CN1705906A

CN1705906A - Display device and display device mounting device

Info

Publication number: CN1705906A
Application number: CN 200380101583
Authority: CN
Inventors: 神戶誠; 津田和彦; 中村浩三; 田口登喜生; 植木俊; 岸本觉
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2002-10-17
Filing date: 2003-10-15
Publication date: 2005-12-07
Anticipated expiration: 2023-10-15
Also published as: CN100504535C

Abstract

A double-sided display which can suitable carry out black display both in a well-lighted place and a dark place is provided. The following members are disposed in the B direction: a first polarizing plate ( 14 ) which allows only a linearly polarized light component to pass through; a liquid crystal layer ( 13 ) which, when a voltage is applied thereto, optically rotates and causes linearly polarized light in one direction to be linearly polarized light in the other direction, while, when no voltage is applied, does not alter the direction of the linearly polarized light; a polarizing selective reflector ( 16 ) which reflects the linearly polarized light in one direction while allows the linearly polarized light in the other direction to pass through; and a second polarizing plate ( 15 ) which absorbs the light in one direction while allows the light in the other direction to pass through. The polarizing selective reflector ( 16 ) is disposed only in the B direction of the liquid crystal layer ( 13 ). Double-sided image reproduction is realized by carrying out reflective image reproduction on the side in the A direction and carrying out transmission image reproduction on the side in the B direction.

Description

Display device and display device mounting device

Technical field

The present invention relates to be fit to have the display device of the display with double faces of two display screens.

Background technology

In recent years, in many display medias, adopt the liquid crystal display device (Liquid CrystalDisplay:LCD) of liquid crystal owing to can show with low power consumption, it is the fastest to be put to practical progress.Consider the display mode and the driving method of this display device, proposed pure matrix and active matrix dual mode.Along with information is carried out multimedization, require display high-resolutionization, high-contrastization, many gray scales (broken colour, standard colour) to change and big visual field angling, can think to be difficult to reply with pure matrix form.Therefore, propose active matric, each pixel is provided with on-off element (active component), drivable scan electrode quantity is increased.Utilize this technology, reaching high-resolutionization, high-contrastization, many gray processings and the big visual field angling of display.In the active matrix type liquid crystal display spare, its structure is: be electrically connected by active component and be arranged to rectangular pixel electrode and by near the sweep trace this pixel electrode.As this active component, the nonlinear element or the 3 terminal nonlinear elements of 2 terminals are arranged, the typical specification product of the active component of current employing are thin film transistor (TFT) (Thin Film Transistor; TFT hereinafter referred to as) (3 terminal component).

In recent years, the liquid crystal display device that uses active component is being popularized in as the mobile device of representative fast with portable phone etc.Mobile device requires under outdoor and indoor two kinds of environment visual high.Existing transmission-type liquid crystal display device can be obtained superior display quality when indoor use, but the problem of the extreme reduction of the outdoor formation display quality of light intensity outside.Developing the transreflective liquid crystal display that uses secondary light source (front lit formula) system and each pixel that reflecting part and two viewing areas of transmissive portions are set in the reflective type liquid crystal display device energetically.

In the mobile devices such as portable phone, the equipment with the screen that shows main information and two kinds of screens of the screen that shows simple and easy information is becoming main flow.The screen that shows main information adopts the liquid crystal board with active matric to show for Large Volume Datas such as display images.The screen that shows simple and easy information is compared with the screen that shows main information, and its viewing area is little, for low capacity data such as demonstration times, adopts the liquid crystal board with pure matrix form to show.Above-mentioned 2 kinds of liquid crystal display devices are disposed back-to-back, realizing double-sided display, but because with 2 kinds of liquid crystal display devices, existence can not thinning, can not gently change, can not cost degradation etc. variety of issue.

In order to solve this point, (the open date: announcement can be carried out the liquid crystal display device of double-sided display by making up 2 reflective polarizer to the patent disclosure 2000-193956 of Japan communique July 14 2000 Christian era).

Figure 15 illustrates the composition of this liquid crystal display device 110.Side at liquid crystal cells 122 disposes the 1st reflective polarizer 118, disposes the 2nd reflective polarizer 142 at the opposite side of liquid crystal cells 122, thereby forms liquid crystal display device 110.In the outside surface side of the 1st reflective polarizer 118,, dispose the 1st absorption-type polariscope 114 again promptly away from a side of liquid crystal cells 122.Also between liquid crystal cells 122 and the 2nd reflective polarizer 142, dispose scattering layer 138.Then, dispose the 2nd absorption-type polariscope 146 in the outside surface side of the 2nd reflective polarizer 142, dispose light absorbing zone 150 freely in the loading and unloading of the outside surface side of the 2nd absorption-type polariscope 146.And then, in the roughly transparent light guide sheet 152 of the outside surface side of the 1st absorption-type polariscope 114 configuration toward liquid crystal cells 122 emergent lights.Light guide sheet 152 has the light source 166 of emergent light.

The axis of homology 146T of the axis of homology 142T of the axis of homology 118T of the axis of homology 144T of the 1st absorption-type polariscope 114 and absorption axes 114A, the 1st reflective polarizer 118 and axis of reflection 118R, the 2nd reflective polarizer 142 and axis of reflection 142R, the 2nd absorption-type polariscope 146 and absorption axes 146A direction separately are as shown in figure 15.

Like this, form the light of the 2nd reflective polarizer 142 reflections on the dark place, can be from the outside surface side of light guide sheet 152 liquid crystal display device 110 be watched as reflection-type from light source 166.Removing under the state of light absorbing zone 150 on the dark place, forming the 2nd reflective polarizer 142 and the 2nd absorption-type polariscope 146 again and make transmittance, can liquid crystal display device be used as transmission-type from the outside surface side of the 2nd reflective polarizer 142 and watch from light source 166.

Yet in the liquid crystal display device 110 that the patent disclosure 2000-193956 of Japan communique discloses, the demonstration of pro and con is all carried out reflection-type with reflective polarizer and is shown, thereby produces following problem.In the bright place, from the outside surface side of the 2nd reflective polarizer 142 liquid crystal display device 110 being used as the transmission-type device watches, then deceive under state shown in Figure 15, to make when showing to revolve and turn 90 degrees from the polarization direction that light guide sheet 152 sides are incided the linearly polarized light of liquid crystal cells 122, but light outside outside surface side's incident of the 2nd reflective polarizer 142 at this moment, the light that incides liquid crystal cells 122 turns back to the outside surface side of the 2nd reflective polarizer 142 just in 118 reflections of the 1st reflective polarizer.Therefore the black quick condition that is shown as, display quality reduces.

Like this, existing double-sided display type liquid crystal display device 110 exists bright place and dark place both sides all can not deceive the problem that shows well.

The present invention finishes in view of above-mentioned existing problem, and its purpose is to provide can both deceive double-sided display escope spare that shows and the display device mounting device that loads this device well on bright place and the dark place.

Summary of the invention

In order to solve above-mentioned problem, display device of the present invention, display media with state of control transmitted light, will be from described display media the side of the either party the both sides toward the described display media of clamping as the 1st side,, and dispose described display media successively from described the 1st side toward described the 2nd side and make the light reflection of the 1st state and the light transmissive selection reflection means of the 2nd state as the 2nd side toward the opposing party's a side; To described display media, only dispose described selection reflection means in described the 2nd side.

According to above-mentioned the present invention, during by display media, display media is controlled the state of this light from the light of the 1st side incident; Control becomes the 1st state, then selects the light of reflection means reflection becoming the 1st state, makes luminous energy return the 1st side of display device.Therefore, can realize bright show state when the 1st side is watched displaying contents.Display media becomes the 2nd state with the State Control of light, then selects the transmittance that reflection means can make becomes the 2nd state, thereby this light is penetrated into the 2nd side of display device.Therefore, can realize that showing slinkingly when the 1st side is watched displaying contents show state.

To be used to from the light of the 1st side incident to show and the bright show state when the 1st side is watched is equivalent to same light is used to show and showing slinkingly when the 2nd side is watched shown state.To be used to from the light of the 1st side incident to show and showing slinkingly when the 1st side is watched shows that state is equivalent to same light is used to show and the bright show state when the 2nd side is watched.That is, in the display device of the present invention, can will be used for from the light of the 1st side incident showing and when the 1st side is watched, carry out reflection-type and show, and will be used for from the light of the 1st side incident showing and when the 2nd side is watched, carry out transmission-type and show.The light that comes from any light source such as the available front lit that is located at display device of the light of the 1st side incident and other sunshines.

On the other hand, making from the light of the 2nd side incident is the 2nd state, then penetrates the selection reflection means, thereby can utilize the control of display media to make light be penetrated into the 1st side, or is absorbed before being penetrated into the 1st side.Different with prior art, to display media only at the 2nd side selection of configuration reflection means, thereby to display media not from the reflected light of the 1st side.At this moment, from the 2nd side incident and form the light of the 2nd state and do not comprise the light of the 1st state, thereby do not selected to turn back to after the reflection means reflection light of the 2nd side.

Therefore, will be used to from the light of the 1st side incident to show and showing slinkingly when the 2nd side is watched shown under the state, and can make after the light reflection of the 2nd side incident and not return, thus dark place not only, and connect bright place, black demonstration is all good.

As a result, can provide bright place and dark place can both deceive the double-side type display device that shows well.

In order to solve above-mentioned problem, display device of the present invention, described state is a polarization state, described selection reflection means is that the light of the 1st polarization state is reflected and the light transmissive polarized light selection reflection means of the 2nd polarization state, and disposing successively from described the 1st side toward described the 2nd side only to make becomes light transmissive the 1st polarization means of regulation polarization state component, described display media, described polarized light selection reflection means and absorb light transmissive the 2nd polarization means that become the light of described the 1st polarization state component and make described the 2nd polarization state component.

According to foregoing invention, the 1st polarization means make the polarization state that becomes regulation from the light of the 1st side incident, for example the 2nd polarization state.This polarized state of light that display media control is passed through; If be controlled to the 1st polarization state, polarized light selects reflection means just to reflect the light that becomes the 1st polarization state, and this light becomes described regulation polarization state once more on display media.Therefore, can realize bright show state when the 1st side is watched displaying contents.Display media becomes the 2nd state with the State Control of light, and then selecting reflection means to make becomes the transmittance of the 2nd state, thereby this light is penetrated into the 2nd side of display device.Therefore, can realize that showing slinkingly when the 1st side is watched displaying contents show state.

On the other hand, the 2nd polarization means make from the light of the 2nd side incident and become the 2nd polarization state, are polarized light and select the reflection means transmission, thereby can utilize the control of display media to make this light in the 1st polarization means transmission, and be penetrated into the 1st side, or absorbed by the 1st polarization means.Different with prior art, display media is only selected reflection means at the 2nd side configuration polarized light, thereby to display media not from the reflected light of the 1st side.At this moment, after the 2nd side incident, penetrate the light of the 2nd polarization means, wherein do not comprise the light of the 1st state, so return the light of the 2nd side after not being subjected to polarized light to select reflection means to reflect owing to absorbed by the 2nd polarization means.

Display device of the present invention, in order to solve above-mentioned problem, described regulation polarization state is a linear polarization state, described the 1st polarization state is the 1st directional ray polarization state, described the 2nd polarization state is and the 2nd directional ray polarization state of described the 1st direction quadrature that described display media is the two formula liquid crystal layers of turning round of 90 degree.

According to foregoing invention, the two display medias of turning round the formula liquid crystal layer of 90 degree are controlled, make the linearly polarized light of the 1st polarization means transmission become the 1st directional ray polarized light, then polarized light selects reflection means to reflect, become the 2nd directional ray polarized light and be controlled to the linearly polarized light that makes the 1st polarization means transmission, then polarized light selects reflection means can carry out transmission.

Display device of the present invention, in order to solve above-mentioned problem, described the 2nd polarization state is a linear polarization state, and in described the 2nd side configuration λ/4 of described the 2nd polarization means slice.

According to foregoing invention, the linearly polarized light that is transmitted to the 2nd side from the 1st side slice becomes circularly polarized light because of λ/4.Therefore, though this light by some reverberation toward the 1st lateral reflection, also incide λ/4 slice once more, make it become linearly polarized light with the direction of above-mentioned linearly polarized light quadrature, thereby absorbed by the 2nd polarization means.

As a result, watch when showing from the 1st side, can show under the state showing slinkingly, prevent to turn back to the light of the 1st side because of reverberation as the reflection-type device.

Display device of the present invention, in order to solve above-mentioned problem, described state is the circular polarization state, described selection reflection means is to make the light reflection of the 1st circular polarization state and make the light transmissive polarized light of the 2nd circular polarization state of sense of rotation and described the 1st circular polarization opposite states select reflection means, disposes light transmissive the 1st axis of homology polarization means that become the linear polarization component that only make prescribed direction successively from described the 1st side toward described the 2nd side, the 1st λ/4 slice, described display media, described polarized light is selected reflection means, the 2nd λ/4 slice, and have the 2nd axis of homology polarization means with the axis of homology of the direction of described the 1st axis of homology polarization means quadrature.

According to the present invention, the 1st axis of homology polarization means make the linearly polarized light that becomes prescribed direction from the light of the 1st side incident, and then penetrate the 1st λ/4 slice, become circularly polarized light.This circular polarization of light state that display media control is passed through; If be controlled to the 1st circular polarization state, polarized light is selected the light of reflection means reflection becoming the 1st circular polarization state.Display media is controlled this circular polarization state once more, and because of the 1st λ/4 slice become the linearly polarized light of described prescribed direction, penetrates the 1st axis of homology polarization means, turns back to the 1st side of display device.Therefore, can realize bright show state when the 1st side is watched displaying contents.It is the 2nd circular polarization state that display media is controlled to the circular polarization of light state, and then polarized light selects reflection means to make the transmittance that becomes the 2nd circular polarization state.The 2nd λ/4 slice make this light become linearly polarized light with the direction of described prescribed direction quadrature, in the 2nd axis of homology polarization means transmission of the axis of homology and the 1st axis of homology polarization means quadrature, and are penetrated into the 2nd side of display device.Therefore, can realize watching showing slinkingly of displaying contents to show state from the 1st side.

On the other hand, the 2nd axis of homology polarization means of the axis of homology and the 1st axis of homology polarization means quadrature make from the light of the 2nd side incident and become linearly polarized light, and this light slice becomes the 2nd circular polarization state because of the 2nd λ/4.Therefore, this light is selected the reflection means transmission at polarized light, thereby the control that utilizes display media forms sense of rotation with from the 1st side incident the time during by the circular polarization state of the circular polarization opposite states of the 1st λ/4 generation, slice become the linearly polarized light of described prescribed direction because of the 1st λ/4, so, be penetrated into the 1st side in the 1st polarization means transmission.Also can utilize the control of display media, form the linear polarization circular polarization of light state that is absorbed by the 1st axis of homology polarization means by the 1st λ/4 acquisition.Different with prior art, to display media, only select reflection means at the 2nd side configuration polarized light, thereby to display media not from the reflected light of the 1st side.At this moment, incide the 2nd λ/4 slice once more, become the linearly polarized light with the direction of the axis of homology quadrature of the 2nd axis of homology polarization means, thereby absorbed by the 2nd axis of homology polarization means from the 2nd side incident and at the light that the metal line of display media reflects.Here, circularly polarized light is not only the wholecircle polarized light, but also comprises ellipticity more than or equal to 0.7 elliptically polarized light.Linearly polarized light is not only polarized light completely, is less than or equal to 0.3 elliptically polarized light but also comprise.

Therefore, the light of the 1st side incident is used to show and showing slinkingly when the 2nd side is watched shown under the state, can makes after the light reflection of the 2nd side incident and not return, thus not only in the dark, and being connected in bright place, black demonstration is all good.

Display device of the present invention in order to solve above-mentioned problem, has absorption and is transmitted to the absorber of light that finish described the 2nd rear flank, makes it insert and to withdraw from light path.

According to foregoing invention, when the 1st side is watched,, can eliminate the reflection of light that is transmitted to the end of the 2nd rear flank from the 1st side, thereby can carry out good black demonstration by inserting absorber of light as the reflection-type device.

Display device of the present invention is for the 1st color filter that solves above-mentioned problem, have described the 1st side that is located at described display media and the 2nd color filter that is located at described the 2nd side of described selection reflection means.

According to foregoing invention, as the reflection-type device when the 1st side is watched, light only passes through the 1st color filter 2 times, and as transmission-type when the 2nd side is watched, light by the 1st color filter and the 2nd color filter each once, thereby the concentration by each color filter of individual settings, can be respectively show and the transmission-type of the 2nd side shows suitably setting brightness and color rendition by the reflection-type of the 1st side.

Display device of the present invention in order to solve above-mentioned problem, has color filter in described the 1st side of described display media, and described color filter has multiple transmissivity district in each pixel of described display media.

Only have in the 1st side under the situation of a color filter, as the reflection-type device when the 1st side is watched, under the bright show state, light passes through color filter 2 times, but as the transmission-type device when the 2nd side is watched, under the bright show state, light only 1 time by color filter, thereby littler than light quantity when the 2nd side is watched when the 1st side is watched.

According to foregoing invention, in the 1st side 1 color filter with multiple transmissivity district is set, thereby can appropriate combination and, and show by the reflection-type of the 1st side respectively and the transmission-type of the 2nd side shows suitable setting brightness and color rendition by the situation different appropriate combination and by different transmissivity districts accordingly with producing above-mentioned light quantity.

Display device of the present invention, in order to solve above-mentioned problem, as described transmissivity district, have described the 2nd side and carry out transmission-type and be arranged in the high-transmission rate district that opposed transmissivity is high on described the 1st side the non-transmission area to transmitted light when showing and be arranged on the low transmissivity district that the transmissivity of the transmission area of described transmitted light is lower than described high-transmission rate district from described the 1st side to described the 2nd side.

According to foregoing invention, as reflection-type when the 1st side is watched, under the bright show state, light 2 times is by the low transmissivity district, thereby under the bright show state, compare by the optical transmission type of 1 low transmissivity with only watching from the 2nd side, light quantity by the low transmissivity district is little, but can use during reflection-type by as when the transmission-type in the non-transmission area of watching the zone of not having contribution on the 1st side the light in opposed high-transmission rate district, thereby can show by the 1st lateral reflection type respectively and the transmission-type of the 2nd side shows suitably setting brightness and color rendition.

Display device of the present invention in order to solve above-mentioned problem, has the light absorption medium in described the 2nd side that drives the drive wire that described display media uses.

According to foregoing invention, light absorbing zone absorbs the light of advancing toward drive wire after the 2nd side incident, thereby can eliminate the reflection from drive wire.

Display device of the present invention in order to solve above-mentioned problem, uses the low reflecting material that reflection of light is suppressed to below the ormal weight to form the drive wire that the described display media of driving is used.

According to foregoing invention, the light that utilizes drive wire to advance toward drive wire after the 2nd side incident is suppressed to and is reflected into below the ormal weight, thereby can eliminate the influence from the reflection of drive wire.

Display device of the present invention, in order to solve above-mentioned problem, make described the 1st side carry out reflection-type when showing and described the 2nd side carry out transmission-type when showing, make the bright dark upset of video data.

According to foregoing invention, make described the 1st side carry out reflection-type when showing and described the 2nd side carry out transmission-type when showing, can make mutual bright showing slinkingly show relationship consistency.

Display device of the present invention, in order to solve above-mentioned problem, make described the 1st side carry out reflection-type when showing and described the 2nd side carry out transmission-type when showing, make video data about upset.

According to foregoing invention, when watching the opposing party after the upset about the side in the display surface of the display surface of the 1st side and the 2nd side, can make display direction consistent with each other.

Display device of the present invention, in order to solve above-mentioned problem, make described the 1st side carry out reflection-type when showing and described the 2nd side carry out transmission-type when showing, make spinning upside down of video data.

According to foregoing invention, when watching the opposing party after the side in the display surface of the display surface of the 1st side and the 2nd side spun upside down, can make display direction consistent with each other.

Display device of the present invention in order to solve above-mentioned problem, to described display media, is provided with the non-transmission area of light in described the 2nd side; To described non-transmission area, dispose described selection reflection means in described the 2nd side; Between at least a portion and described display media of described non-transmission area, be provided with from the 1st side toward the 2nd side by the reflection of light means of described display media.

According to foregoing invention,, the non-transmission area of light is set in described the 2nd side to described display media; To described non-transmission area, dispose described selection reflection means in described the 2nd side, simultaneously also between at least a portion and described display media of described non-transmission area, by the reflection of light means of described display media, the light by display media reflects thereby make from the 1st side toward the 2nd side from the 1st side toward the 2nd side in outfit.Therefore, when the 1st side watches reflection-type to show, can make because of non-transmission area covers with reflection means and not arrive the light reflection of selecting reflection means, can guarantee to show bright.

Display device of the present invention, in order to solve above-mentioned problem, described state is a polarization state, described selection reflection means is that the light of the 1st polarization state is reflected and the light transmissive polarized light selection reflection means of the 2nd polarization state, dispose successively and only make light transmissive the 1st polarization means that become regulation polarization state component from described the 1st side toward described the 2nd side, described display media, described polarized light is selected reflection means, and absorb light transmissive the 2nd polarization means become the light of described the 1st polarization state component and to make described the 2nd polarization state component, and a pair of transparent substrates with the described display media of clamping, select reflection means to be configured in described the 2nd side described polarized light, at described display media and be between the described transparent substrates of described the 2nd side described non-transmission area is set with respect to the transparent substrates that is in described the 2nd side in the described a pair of transparent substrates.

According to foregoing invention, by to being in the transparent substrates of the 2nd side in a pair of transparent substrates, select reflection means at the 2nd side configuration polarized light, and polarized light is selected reflection means be configured in a pair of transparent substrates inboard to compare, product reliability improves, and can also carry out favourable manufacturing process simultaneously.At display media and be between the transparent substrates of the 2nd side the non-transmission area of light is set, select reflection means but dispose above-mentioned polarized light, utilize reflection means to make from the 1st side toward the 2nd side again by the light reflection of display media.Therefore, when the 1st side watches reflection-type to show, can make because of non-transmission area covers with reflection means and not arrive the light reflection of selecting reflection means, can guarantee to show bright.

Display device of the present invention, in order to solve above-mentioned problem, described display media is under the bright show state when described the 1st side is watched, at light that described reflection means is reflected and the light of selecting reflection means to be reflected at described polarized light after described the 1st side incident of described the 1st polarization means, penetrate described the 1st polarization means once more after described the 1st side incident of described the 1st polarization means; Show under the state showing slinkingly when described the 1st side is watched, at light that described reflection means is reflected with select the light of reflection means after described the 1st side incident of described the 1st polarization means towards described polarized light, do not penetrate described the 1st polarization means once more after described the 1st side incident of described the 1st polarization means.

According to foregoing invention, under the bright show state when the 1st side is watched, the polarized state of light that display media control is passed through, make the 1st polarization means after the 1st side incident light that reflection means reflects and the 1st polarization means after the 1st side incident, select the light that reflection means reflects to penetrate the 1st polarization means once more at polarized light, thereby help the light of reflection means reflection and the demonstration that polarized light selects the light of reflection means reflection to become clear simultaneously.Therefore, can guarantee the brightness that reflection-type shows.

Show under the state showing slinkingly when the 1st side is watched, the polarized state of light that display media control is passed through, make the 1st polarization means after the 1st side incident light that reflection means reflects and the 1st polarization means after the 1st side incident, select the light that reflection means reflects not penetrate the 1st polarization means once more at polarized light, thereby the light and the polarized light that help the reflection means reflection select the light of reflection means reflection to deceive demonstration simultaneously.Therefore, can realize showing slinkingly and show and do not have problems state.

Display device of the present invention, in order to solve above-mentioned problem, described the 1st polarization state is the 1st directional ray polarization state, described the 2nd polarization state is and the 2nd directional ray polarization state of described the 1st direction quadrature that described regulation polarization state is the 1st polarization state; Described display media is to the light from described the 1st polarization means of described the 1st side transmission, under bright show state, polarization state is changed, and show under the state showing slinkingly, the polarized state of light that control is passed through, make the phase differential position zero when described the 1st polarization state between each component that is fixed on the polarized light orthogonal axes in the face parallel with described transparent substrates, be pi/2 roughly in the end point of passing through from described the 1st polarization means toward the light of described reflection means, simultaneously also from described reflection means toward described the 1st polarization means the end point of passing through be π roughly, the end point of the light from described the 1st polarization means toward described polarized light selection reflection means is π roughly.

According to foregoing invention, the light that penetrates described the 1st polarization means from the 1st side becomes the 1st directional ray polarized light, under bright show state, display media does not roughly make this light change, thereby will arrive the light reflection that polarized light is selected reflection means, together photosynthetic with reflection means reflection penetrates the 1st polarization means once more.

Show slinkingly and show under the state, display media is controlled, make the phase differential position zero when described the 1st polarization state between each component that is fixed on the polarized light orthogonal axes in the face parallel with described transparent substrates, be pi/2 roughly in the end point of passing through from described the 1st polarization means toward the light of described reflection means, thereby light becomes circularly polarized light, the arrival reflection means.The light of reflection means reflection becomes the polarization sense of rotation anti-circularly polarized light opposite with above-mentioned circularly polarized light, thereby display media is controlled, make the end point of passing through of the light toward described the 1st polarization means form roughly π from reflection means, arrive the 1st polarization means thereby become, and do not penetrate the 1st polarization means with the 2nd directional ray polarization state (i.e. the 2nd polarization state) of the 1st direction quadrature is back.Display media is controlled again, makes above-mentioned phase differential be π roughly in the end point of passing through of the light of selecting reflection means from the 1st polarization means toward polarized light, thereby light becomes arrival polarized light selection approach behind the 2nd polarization state, and penetrates the polarized light selection approach.

Like this, under the bright show state of reflection-type, can guarantee display brightness, simultaneously can also realize showing slinkingly and show and do not have problems state.

Display device of the present invention, in order to solve above-mentioned problem, be in the described display media between described the 1st polarization means and the described reflection means and be in described the 1st polarization means and the opposed described polarized light of different described reflection means and select the display media between the reflection means to compare and be roughly 1 to 2 being connected thickness that described the 1st side and the direction of described the 2nd side see.

According to foregoing invention, between described the 1st polarization means and the described reflection means and described the 1st polarization means and the opposed described polarized light of different described reflection means select between the reflection means, display media is connecting thickness that described the 1st side and the direction of described the 2nd side see than being roughly 1 to 2, thereby the display media that makes 2 zones keeps the such identical type of ECB liquid crystal constant, only just can realize that with different thickness polarized state of light round in 2 zones of consideration controls.Above-mentioned ratio is for roughly 1 to 2 more satisfactory, yet for being equal to or greater than 3 to 10, being less than or equal to 7 to 10, can seek the optical path length coupling of 2 light in the district, improves the utilization ratio of light, thereby can realize the raising of display quality.

Display device of the present invention, in order to solve above-mentioned problem, described display media is under the conventional state that shows, described polarized light selects reflection means to make the wide part transmission that arrives from the 1st side, described the 1st polarization means absorb the most of light that arrives from described reflection means reflection back, and described the 2nd polarization means make the wide part transmission that arrives from described the 1st side; Under the maximum drive state that shows, described polarized light selects reflection means to make the wide partial reflection that arrives from described the 1st side, and described 1 polarization means make the wide part transmission that arrives from described reflection means reflection back.

According to foregoing invention, when liquid crystal is not applied voltage and when applying low-voltage etc. like that, show under the conventional state, polarized light selects reflection means to make the wide part transmission that arrives from the 1st side, the 1st polarization means make wide the partially absorbing that arrives from described reflection means reflection back, and the 2nd polarization means make the wide part transmission that arrives from the 1st side.Again when liquid crystal is applied sufficiently high voltage etc. like that, under the display driver state, polarized light selects reflection means to make the wide partial reflection that arrives from the 1st side, waits 1 polarization means to make the wide part transmission that arrives from reflection means reflection back.

Therefore, when the 1st side watches reflection-type to show, form normal deceiving, when the 2nd side watches transmission-type to show, form Chang Bai, thereby carry out black demonstration in the transmission-type under the driving condition, make the black demonstration of carrying out in the transmission-type good, do not rely on manufacturing process, thereby contrast is improved.

During reflection-type shows, select the zone of reflection means to deceive demonstration with conventional state simultaneously in zone of using reflection means and use polarized light, and carry out white demonstration with driving condition simultaneously.Therefore,, also can make black the demonstration, can realize good demonstration in 2 zones of pixel with demonstration is consistent in vain even comprise 2 zones in 1 pixel.

Display device of the present invention, in order to solve above-mentioned problem, the viewing area of described display media is divided at least and makes the light that incides described display media from described the 1st side be transmitted to the transmission running of the 2nd side to described display media and make the light that incides described display media from described the 1st side reflex to the 1st district of the reflection running of the 2nd side to described display media, and carry out and to reflex to the 2nd district of the reflection running of the 1st side by the light of described display media from described the 1st side, described display media is disposed from the reflection of light means of past described the 2nd side of described the 1st side by described display media in described the 2nd side, and described the 2nd district is carried out the reflection running in described the 2nd district by described reflection means; The transmission running that can finish described the 1st district that utilizes described the 2nd state of control to make the transmission of described selection reflection means and form will be used for from the light that described the 1st side incides described the 1st district transmission-type to the demonstration on described the 2nd side of described display media and show, utilizes described the 1st state of control to make described selection reflection means reflection and the reflection running in described the 1st district that forms will be used for from the light that described the 1st side incides described the 1st district the 1st reflection-type demonstration of the demonstration on described the 1st side of described display media and utilize the reflection in described the 2nd district to operate and will incide the light in described the 1st district for the 2nd reflection-type demonstration to the demonstration on described the 1st side of described display media from described the 1st side.

According to foregoing invention, can when watching display device, the 2nd side use the transmission-type in the 1st district to show, and when watching display device, the 1st side use the reflection-type in the 1st district and the 2nd district to show.

Display device of the present invention, in order to solve above-mentioned problem, during described the 1st reflection-type shows, to light-operatedly make described the 1st state from what described the 1st side incided the 1st district, make its reflection by described selection reflection means, form bright show state, and will light-operatedly make described the 2nd state from what described the 1st side incided the 1st district, make it penetrate described selection reflection means, form to show slinkingly and show; During described the 2nd reflection-type shows, arrive beholder by the light that makes the reflection of described reflection means to the 1st side of described display media, form bright demonstration, and do not arrive beholder, form to show slinkingly and shows the 1st side of described display media by the light that makes the reflection of described reflection means; During described the 1st reflection-type demonstration and described the 2nd reflection-type showed, bright show state showed that with showing slinkingly state is consistent respectively.

According to foregoing invention, during the 1st reflection-type showed and the 2nd reflection-type shows, bright show state showed that with showing slinkingly state distinguishes consistently, thereby the demonstration that they are lumped together is good, can not cancel out each other.Again by the non-transmission area of the light that forms in the display device is set in the 2nd district, the light utilization ratio that the reflection-type of watching from the 1st side is shown improves with the 1st reflection-type demonstration of using the 1st district and uses the 2nd reflection-type in the 2nd district to show the share that both show.

Display device of the present invention, in order to solve above-mentioned problem, during described transmission-type shows, to light-operatedly make described the 1st state from what described the 1st side incided the 1st district, make its reflection by described selection reflection means, form to show slinkingly and shows state, and will light-operatedly make described the 2nd state from what described the 1st side incided the 1st district, make it penetrate described selection reflection means, form bright demonstration.

According to foregoing invention, show as the reflection-type of the bright show state of watching the transmission-type seen from the 2nd side to show from the 1st side, can make showing slinkingly that the transmission-type seen from the 2nd side shows show that state is the bright show state that shows from the reflection-type that the 1st side is seen.

Display device of the present invention in order to solve above-mentioned problem, only makes light transmissive the 1st polarization means that become regulation polarization state component to described display media in described the 1st side configuration.

According to foregoing invention, can carry out the demonstration of high-contrast.

Display device of the present invention, in order to solve above-mentioned problem, described regulation polarization state is a linear polarization state, described the 1st polarization state is the 1st directional ray polarization state, described the 2nd polarization state is the 2nd a directional ray polarization state with described the 1st direction quadrature, the axis of homology of described the 1st polarization means and described polarized light are selected the axis of homology quadrature of reflection means, when the minimum voltage that described display media is applied in the driving voltage, the light that incides described the 1st district from described the 1st side selects reflection means to form to have to select with described polarized light the elliptically polarized light or the linearly polarized light of the parallel major axis of the axis of homology of reflection means at described polarized light, and the light that incides described the 2nd district from described the 1st side is at described reflection means formation elliptically polarized light or circularly polarized light.

According to foregoing invention, use in the reflection-type demonstration in the 1st district and the 2nd district, promptly use demonstration of the 1st reflection-type and the 2nd reflection-type to show in both reflection-type demonstrations, can make both black demonstrations consistent accurately, thereby make black demonstration well.

Display device of the present invention, in order to solve above-mentioned problem, described regulation polarization state is a linear polarization state, described the 1st polarization state is the 1st directional ray polarization state, described the 2nd polarization state is the 2nd a directional ray polarization state with described the 1st direction quadrature, the axis of homology of described the 1st polarization means and described polarized light are selected the axis of homology quadrature of reflection means, when the ceiling voltage that described display media is applied in the driving voltage, the light that incides described the 1st district from described the 1st side selects reflection means to form to have to select with described polarized light the elliptically polarized light or the linearly polarized light of the parallel major axis of the axis of homology of reflection means at described polarized light, and the light that incides described the 2nd district from described the 1st side is at described reflection means formation elliptically polarized light or circularly polarized light.

Display device of the present invention, in order to solve above-mentioned problem, it is that ellipticity is less than or equal to 0.3 elliptically polarized light that described polarized light is selected described elliptically polarized light and described linearly polarized light on the reflection means, and described elliptically polarized light on the described reflection means and circularly polarized light are ellipticities more than or equal to 0.7 elliptically polarized light.

According to foregoing invention, during demonstration of the 1st reflection-type and the 2nd reflection-type showed, the light in the time of making black the demonstration respectively after the reflection did not return the 1st side to the 1st polarization means major part.

Display device of the present invention, in order to solve above-mentioned problem, the described elliptically polarized light on the described polarized light selection reflection means and the ellipticity of described linearly polarized light are less than or equal to 0.22.

According to foregoing invention, the light in the time of making black the demonstration after the reflection does not return the 1st side to the 1st polarization means.

Display device of the present invention, in order to solve above-mentioned problem, the described elliptically polarized light on the described reflection means and the ellipticity of described circularly polarized light are more than or equal to 0.78.

Display device of the present invention in order to solve above-mentioned problem, disposes optical compensatory element in described the 1st side at least to described display media.

According to foregoing invention, be convenient to form polarization state control, the light when being used to make black the demonstration after the reflection does not return the 1st side to the 1st polarization means major part.

Display device of the present invention in order to solve above-mentioned problem, disposes the optical compensatory element with optical path difference to described display media in described the 2nd side.

According to foregoing invention, transmission-type can utilize the optical compensatory element that is in the 2nd side in showing, polarization state control is carried out in the polarization state control of the optical compensatory element of the 1st side in the junction.

Display device of the present invention, in order to solve above-mentioned problem, described optical compensation means are made up of a plurality of optical compensatory elements.

According to foregoing invention, can obtain the polarization state of hope in the vast scope of visible region.

Display device of the present invention, in order to solve above-mentioned problem, the described display media in described the 2nd district is optical path difference more than or equal to 150nm, is less than or equal to the 90 degree twisted-nematic liquid crystal floor of 340nm.

According to foregoing invention, display media uses under the situation of 90 degree twisted-nematic liquid crystal layers, in the black demonstration when reflection-type shows, can obtain ellipticity more than or equal to 0.7 elliptically polarized light on reflection means.

Display device of the present invention, in order to solve above-mentioned problem, the described display media in described the 1st district is the 90 degree twisted-nematic liquid crystal floor of optical path difference more than or equal to 400nm.

According to foregoing invention, use at display media under the situation of 90 degree twisted-nematic liquid crystal layers, when being shown, strengthens transmission-type the liquid crystal layer transmissivity.

Display device of the present invention, in order to solve above-mentioned problem, configuration has the 1st optical compensation means of optical path difference between described the 1st polarization means and described display media, select the optical compensatory element that configuration has optical path difference between the reflection means at described display media and described polarized light, selecting reflection means to absorb in described 2 sides configuration to described polarized light becomes the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means that become described the 2nd polarization state, described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the roughly relation of quadrature, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that does not apply the optical path difference R1 of the value of optical path difference R r of described liquid crystal layer in described the 2nd district of state of voltage and described the 1st optical compensation means satisfies-175nm≤(Rr-R1)≤-105nm, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensation means has the roughly relation of quadrature, and the value that does not apply the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 190nm≤(Rr-R1+R2)≤30nm.

According to foregoing invention, during showing, reflection-type obtains more than or equal to 8% reflectivity with more than or equal to 5 contrast ratio, during showing, transmission-type obtains more than or equal to 8% reflectivity with more than or equal to 10 contrast ratio.

Display device of the present invention, in order to solve above-mentioned problem, configuration has the 1st optical compensation means of optical path difference between described the 1st polarization means and described display media, select the 2nd optical compensatory element that configuration has optical path difference between the reflection means at described display media and described polarized light, selecting reflection means to absorb in described 2 sides configuration to described polarized light becomes the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means that become described the 2nd polarization state, described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the roughly relation of quadrature, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of ceiling voltage in the driving voltage and described the 1st optical compensation means satisfies-175nm≤(Rr-R1)≤-105nm, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensation means has the roughly relation of quadrature, and the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of ceiling voltage in the driving voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 190nm≤(Rr-R1+R2)≤30nm.

Display device of the present invention, in order to solve above-mentioned problem, configuration has the 1st optical compensation means of optical path difference between described the 1st polarization means and described display media, select the 2nd optical compensatory element that configuration has optical path difference between the reflection means at described display media and described polarized light, selecting reflection means to absorb in described 2 sides configuration to described polarized light becomes the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means that become described the 2nd polarization state, described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the relation of almost parallel, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that does not apply the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of voltage and described the 1st optical compensation means satisfies-175nm≤(Rr-R1)≤-105nm, the value that does not apply the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference R t of described liquid crystal layer in described the 1st district of state of voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 25nm≤(Rr-R1+R2)≤50nm when the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensation means has concerning of almost parallel, or the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensatory element satisfies when having concerning of quadrature roughly-50nm≤(Rr-R1-R2)≤25nm.

Display device of the present invention, in order to solve above-mentioned problem, configuration has the 1st optical compensation means of optical path difference between described the 1st polarization means and described display media, select the 2nd optical compensatory element that configuration has optical path difference between the reflection means at described display media and described polarized light, selecting reflection means to absorb in described 2 sides configuration to described polarized light becomes the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means that become described the 2nd polarization state, described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the relation of almost parallel, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of ceiling voltage in the driving voltage and described the 1st optical compensation means satisfies-175nm≤(Rr-R1)≤-105nm, the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of described ceiling voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 25nm≤(Rr-R1+R2)≤50nm when the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensation means has concerning of almost parallel, or the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensatory element satisfies when having concerning of quadrature roughly-50nm≤(Rr-R1-R2)≤25nm.

Display device of the present invention, in order to solve above-mentioned problem, configuration has the 1st optical compensation means of optical path difference between described the 1st polarization means and described display media, select the 2nd optical compensatory element that configuration has optical path difference between the reflection means at described display media and described polarized light, selecting reflection means to absorb in described 2 sides configuration to described polarized light becomes the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means that become described the 2nd polarization state, described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the roughly relation of quadrature, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that does not apply the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of voltage and described the 1st optical compensation means satisfies 100nm≤(Rr-R1)≤170nm, the hysteresis axle of the axis of guide of liquid crystal molecule and the 2nd optical compensation means has the roughly relation of quadrature, and the value that does not apply the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 190nm≤(Rr-R1-R2)≤300nm.

Display device of the present invention, in order to solve above-mentioned problem, configuration has the 1st optical compensation means of optical path difference between described the 1st polarization means and described display media, select the 2nd optical compensatory element that configuration has optical path difference between the reflection means at described display media and described polarized light, selecting reflection means to absorb in described 2 sides configuration to described polarized light becomes the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means that become described the 2nd polarization state, described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the roughly relation of quadrature, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of ceiling voltage in the driving voltage and described the 1st optical compensation means satisfies 100nm≤(Rr-R1)≤170nm, the hysteresis axle of the axis of guide of liquid crystal molecule and the 2nd optical compensation means has the roughly relation of quadrature, and the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of described ceiling voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 190nm≤(Rr-R1-R2)≤300nm.

Display device of the present invention, in order to solve above-mentioned problem, configuration has the 1st optical compensation means of optical path difference between described the 1st polarization means and described display media, select the 2nd optical compensatory element that configuration has optical path difference between the reflection means at described display media and described polarized light, selecting reflection means to absorb in described 2 sides configuration to described polarized light becomes the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means that become described the 2nd polarization state, described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the relation of almost parallel, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that does not apply the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of voltage and described the 1st optical compensation means satisfies 100nm≤(Rr-R1)≤170nm, the hysteresis axle of the axis of guide of liquid crystal molecule and the 2nd optical compensation means has the roughly relation of quadrature, and the value that does not apply the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies-50nm≤(Rr-R1-R2)≤50nm.

Display device of the present invention, in order to solve above-mentioned problem, configuration has the 1st optical compensation means of optical path difference between described the 1st polarization means and described display media, select the 2nd optical compensatory element that configuration has optical path difference between the reflection means at described display media and described polarized light, selecting reflection means to absorb in described 2 sides configuration to described polarized light becomes the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means that become described the 2nd polarization state, described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the relation of almost parallel, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of ceiling voltage in the driving voltage and described the 1st optical compensation means satisfies 100nm≤(Rr-R1)≤170nm, the hysteresis axle of the axis of guide of liquid crystal molecule and the 2nd optical compensation means has the roughly relation of quadrature, and the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of described ceiling voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies-50nm≤(Rr-R1-R2)≤50nm.

Display device of the present invention in order to solve above-mentioned problem, has the light scattering means of light scattering function in described the 1st side configuration to described display media.

According to foregoing invention, see the pattern overlapping that surround lighting causes in the time of avoiding surround lighting from the 1st side incident of display device during transmission-type shows.

Display device of the present invention, in order to solve above-mentioned problem, the degree of distributing always of described display device for more than or equal to 50, be less than or equal to 95.

According to foregoing invention, pattern overlapping that surround lighting causes and contrast ratio reduce and can both be inhibited.

Display device of the present invention, in order to solve above-mentioned problem, the horizontal direction of the device posture of the direction of the axis of homology of described the 1st polarization means when using described display device is consistent.

According to foregoing invention, can improve in conjunction with the polarized light component environment how that electric field vibrates in the horizontal direction the utilization ratio of light.

Display device of the present invention in order to solve above-mentioned problem, has the optical modulation means that can switch travel condition at least one side of described the 1st side of described display device and described the 2nd side to the regulation incident emergent light of described display device in accordance with regulations like that.

According to foregoing invention, switch the travel condition of display device being carried out the light of incident outgoing by utilizing the optical modulation means, can avoid light to keep intact when advancing to display device in the problem of beholder's opposition side reading displayed and the problem that is not suitable for showing.

Display device of the present invention, in order to solve above-mentioned problem, described optical modulation means form the described travel condition of transmissive state to the light switching of advancing from described display device toward outside direction in the described incident emergent light to described optical modulation means and described optical modulation means are formed the described travel condition of scattering state.

According to foregoing invention,, can make beholder's the opposition side can not be to the display device reading displayed by switching to the travel condition that forms scattering state.

Display device of the present invention, in order to solve above-mentioned problem, configuration is shone the light of the demonstration usefulness of described display device as the incident light in the described incident emergent light rayed means, described optical modulation means are configured in described display media side with respect to described rayed means, becoming under the travel condition of described scattering state, making the light of described rayed means irradiation form scattering state described optical modulation means.

According to foregoing invention, when the light with the irradiation of rayed means carries out the transmission-type demonstration, switch to the travel condition that forms scattering state, from seeing that the opposition side that makes the beholder can not be to the display device reading displayed.And, because the optical modulation means are used the light of doing the display device input after making the light of rayed means irradiation under this travel condition become scattering state, even when the light of rayed means irradiation exists gradation unequal even, also can prevent the display performance reduction.

Display device of the present invention, in order to solve above-mentioned problem, described optical modulation means form the described travel condition of transmissive state to the light switching of advancing from described display device toward outside direction in the described incident emergent light to described optical modulation means and described optical modulation means are formed the described travel condition of reflective condition.

According to foregoing invention,, can make beholder's the opposition side can not be to the display device reading displayed by switching to the travel condition that forms reflective condition.

Display device of the present invention, in order to solve above-mentioned problem, described optical modulation means switch that a side that the both sides of the light of 2 polarization states with mutually orthogonal relation form the light of the described travel condition of transmissive state and described 2 polarization states to described optical modulation means forms reflective condition to described optical modulation means and the opposing party to the described travel condition of described optical modulation means formation transmissive state.

According to foregoing invention, by making the light of advancing toward outside direction from described display device in the incident emergent light is a described side of the light of 2 polarization states, a described side is reflective condition, the opposing party under the travel condition of transmissive state, can make beholder's the opposition side can not be to the display device reading displayed.And, under this travel condition, the light of advancing from outside direction during demonstration, a described side of the light of 2 polarization states is a reflective condition in the incident emergent light, even thereby utilize this reflected light, also can make beholder's the opposition side can not be to the display device reading displayed.

Display device of the present invention, in order to solve above-mentioned problem, described optical modulation means switch in the described travel condition of setting the described travel condition of the light path that does not change direct of travel in the described optical modulation means and set the light path that makes the direct of travel bending in described optical modulation means to the light of advancing toward outside direction from described display device in the described incident emergent light.

According to foregoing invention,, can make beholder's the opposition side can not be to the display device reading displayed by switching in the optical modulation means travel condition of setting the light path that makes the direct of travel bending.

Display device of the present invention, in order to solve above-mentioned problem, described optical modulation means form the described travel condition of transmissive state to the light switching of advancing from described display device toward outside direction in the described incident emergent light to described optical modulation means and described optical modulation means are formed the described travel condition of absorbing state.

According to foregoing invention,, can make beholder's the opposition side can not be to the display device reading displayed by switching to the travel condition that forms absorbing state.

Display device of the present invention is in order to solve above-mentioned problem, the rayed means of the light of the demonstration usefulness of the described display device of configuration irradiation, and the protective cover of the described rayed means of described optical modulation means double as.

According to foregoing invention, do not need to be provided with separately protective cover, therefore can carry out the dustproof antifouling of rayed means, and not increase the display device gross thickness.

Display device of the present invention in order to solve above-mentioned problem, uses screen to switch described travel condition in linkage with in the display screen on described the 2nd side of display screen on described the 1st side of described display device and described display device which is used as.

According to foregoing invention, select the display screen of use, then carry out the change action of optical modulation means in combination, thereby do not need to indicate the operation of change action with it.

Display device mounting device of the present invention in order to solve above-mentioned problem, loads any above-mentioned display device, and can be folded into described display device described the 1st side display surface outwardly, the display surface that also makes described the 2nd side simultaneously is inwardly.

According to foregoing invention, can under folding state, utilize the demonstration of the reflection of selecting reflection means at the display surface of the 1st side, and watch from the outside, can under the state of opening, utilize the demonstration of the transmission of selecting reflection means at the display surface of the 2nd side, and watch again.

Display device mounting device of the present invention, in order to solve above-mentioned problem, folded state adopts the member that carries out light absorption with the opposed member of described the 2nd side display surface of described display device down.

According to foregoing invention, when under folding state, watching the display surface of the 1st side, use with the opposed member of the display surface of the 2nd side and carry out light absorption, thereby can make light not arrive the 1st side by display device from the 2nd side, can prevent to show slinkingly show appear in one's mind white.

Display device mounting device of the present invention in order to solve above-mentioned problem, has the operation push-button that indication is overturn demonstration on described the 1st side of described display device and the demonstration on described the 2nd side mutually.

According to foregoing invention, when the demonstration of the demonstration of the 1st side and the 2nd side is the demonstration of upset mutually, can obtain to utilize operation push-button by operation push-button switch to respectively demonstration on the 1st side watch with the 2nd side on the suitable show state watched of demonstration.

Display device mounting device of the present invention, in order to solve above-mentioned problem, described operation push-button is the automatic operation push-button of operating and indicating described demonstration upset with folding switch motion in linkage automatically.

According to foregoing invention, when between the 1st side and the 2nd side, switching the demonstration of watching with open mode and closure state, can obtain the suitable show state that automaticallyes switch respectively by automatic operation push-button.

Display device mounting device of the present invention, in order to solve above-mentioned problem, load the display device described in the

claim

1,2,3,4,15,21 or 46, and have and can be configured to member opposed with the display surface of described the 2nd side of described display device and that carry out light absorption.

According to foregoing invention, when watching the display surface of the 1st side, dispose the member that carries out light absorption opposed to each other, thereby can make light not arrive the 1st side by display device from the 2nd side by display surface with the 2nd side, can prevent to show slinkingly show appear in one's mind white.

Other purpose of the present invention, feature and advantage, the record by hereinafter can be fully understood.Below with reference to understanding interests of the present invention in the description of the drawings.

Description of drawings

Fig. 1 is the sectional view of composition that the display device of embodiment of the present invention 1 is shown.

Fig. 2 is the 1st action diagram of moving of the display device of key diagram 1.

Fig. 3 is the 2nd action diagram of moving of the display device of key diagram 1.

Fig. 4 is the sectional view that illustrates the composition of the display device of the comparative example of the display device of Fig. 1.

Fig. 5 is the outside drawing as the mobile telephone of the display device mounting device of the loading display device of embodiment of the present invention 2.

Fig. 6 (a) and Fig. 6 (b) are the user mode figure of user mode of the mobile telephone of key diagram 5.

Fig. 7 is the sectional view of composition that the display device of embodiment of the present invention 2 is shown.

Fig. 8 is the sectional view of composition that the display device of embodiment of the present invention 3 is shown.

Fig. 9 is the sectional view of composition that the display device of embodiment of the present invention 4 is shown.

Figure 10 is the vertical view of the display device of Fig. 9.

Figure 11 is composition and the 1st sectional view that moves that the display device of embodiment of the present invention 5 is shown.

Figure 12 is the 2nd action diagram of moving that the display device of embodiment of the present invention 5 is shown.

Figure 13 is the axle setting figure of the setting of each in the display device of explanation Figure 11 and Figure 12.

Figure 14 is that the explanation polarized light is selected the thickness of reflector plate and the sectional view of influence thereof.

Figure 15 is the sectional view that the composition of existing display device is shown.

Figure 16 is the sectional view of composition that the display device of embodiment of the present invention 6 is shown.

Figure 17 is the 1st action diagram of moving of the display device of explanation Figure 16.

Figure 18 is the 2nd action diagram of moving of the display device of explanation Figure 16.

Figure 19 is the roughly vertical view of the pixel that has in the display device of embodiment of the present invention 7.

Figure 20 is the sectional view of composition that the display device of embodiment of the present invention 7 is shown.

Figure 21 is the 1st curve map of display characteristic of the display device of explanation Figure 20.

Figure 22 is the 2nd curve map of display characteristic of the display device of explanation Figure 20.

Figure 23 is the sectional view of composition that the display device of embodiment of the present invention 8 and embodiment 9 is shown.

Figure 24 is the 1st curve map that the characteristic of the display device use of explanation embodiment 8 related Figure 23 is used.

Figure 25 is the 2nd curve map that the characteristic of the display device use of explanation embodiment 8 related Figure 23 is used.

Figure 26 is the 3rd curve map that the characteristic of the display device use of explanation embodiment 8 related Figure 23 is used.

Figure 27 is the 4th curve map that the characteristic of the display device use of explanation embodiment 8 related Figure 23 is used.

Figure 28 is the 1st curve map that the characteristic of the display device of explanation embodiment 8 related Figure 23 is used.

Figure 29 is the 2nd curve map that the characteristic of the display device of explanation embodiment 8 related Figure 23 is used.

Figure 30 is the curve map that the relevant characteristic of another composition of the display device of explanation embodiment 8 related Figure 23 is used.

Figure 31 is the figure of each optical axis direction initialization that the display device of embodiment 8 related Figure 23 is shown.

Figure 32 be illustrate embodiment 8 related Figure 23 display device another form in the figure of each optical axis direction initialization.

Figure 33 is the 1st curve map of display characteristic that the display device of embodiment 9 related Figure 23 is shown.

Figure 34 is the 2nd curve map of display characteristic that the display device of embodiment 9 related Figure 23 is shown.

Figure 35 is the 3rd curve map of display characteristic that the display device of embodiment 9 related Figure 23 is shown.

Figure 36 is the 4th curve map of display characteristic that the display device of embodiment 9 related Figure 23 is shown.

Figure 37 is the 5th curve map of display characteristic that the display device of embodiment 9 related Figure 23 is shown.

Figure 38 is the figure of each optical axis direction initialization that the display device of the related Figure 23 of embodiment 9 is shown.

Figure 39 is the 6th curve map of display characteristic that the display device of embodiment 9 related Figure 23 is shown.

Figure 40 is the 7th curve map of display characteristic that the display device of embodiment 9 related Figure 23 is shown.

Figure 41 is the 8th curve map of display characteristic that the display device of embodiment 9 related Figure 23 is shown.

Figure 42 is the sectional view of composition that the display device of embodiment of the present invention 10 is shown.

Figure 43 is the sectional view of composition of optical modulator body that shows the display device of Figure 42.

Figure 44 is the sectional view of another composition of optical modulator body that shows the display device of Figure 42.

Figure 45 is the sectional view of another composition of optical modulator body that shows the display device of Figure 42.

Figure 46 is the sectional view of another composition of optical modulator body that shows the display device of Figure 42.

Figure 47 is the sectional view of another composition of optical modulator body that shows the display device of Figure 42.

Figure 48 is the stereographic map of the optical modulator body of Figure 47.

Figure 49 is the sectional view of another composition of optical modulator body that shows the display device of Figure 42.

Figure 50 is the stereographic map of the optical modulator body of Figure 49.

Figure 51 is the sectional view of another composition of optical modulator body that shows the display device of Figure 42.

Figure 52 (a) and Figure 52 (b) are the front lit stereographic maps that the concealed wire of explanation front lit is used.

Figure 53 is the stereographic map that the mobile telephone folded state of the related Fig. 5 of embodiment of the present invention 2 is shown.

Figure 54 is the side view of the mobile telephone of Figure 53.

Figure 55 illustrates the stereographic map of the state of the mobile telephone of folding Fig. 5 in the other direction.

Figure 56 (a) and Figure 56 (b) are the stereographic maps that illustrates as the notebook type PC of the display device mounting device of embodiment of the present invention 2.

Figure 57 (a) and Figure 57 (b) are the stereographic maps that illustrates as the portable terminal device of the display device mounting device of embodiment of the present invention 2.

Figure 58 (a) and Figure 58 (b) are the stereographic maps that illustrates as the televisor of the display device mounting device of embodiment of the present invention 2.

Figure 59 is the stereographic map that the state of the lid of closing Figure 58 (b) is shown

Figure 60 is the side view of the state of Figure 59.

Figure 61 (a) and Figure 61 (b) are the stereographic maps that illustrates as the digital camera of the display device mounting device of embodiment of the present invention 2.

The invention preferred forms

Below, utilize embodiment to further describe the present invention, but be not subjected to any qualification of these embodiments.

Embodiment 1

Illustrate that according to Fig. 1 to Fig. 4 and Figure 10 an embodiment of the present invention is as follows.

Fig. 1 illustrates the cross section of the liquid crystal display device (display device) 1 of present embodiment and forms.

Liquid crystal display device 1 has the 1st glass substrate the 11, the 2nd glass substrate 12, liquid crystal layer the 13, the 1st polaroid the 14, the 2nd polaroid 15, polarized light selection reflector plate 16, color filter 17, photomask 18, transparency electrode 19, on-off element 20, light absorbing zone 21, light source 22 and light guide sheet 23.Be formed on structure as clamping liquid crystal layer 13 between the 1st glass substrate 11 of a pair of transparent substrates and the 2nd glass substrate 12, and the side from liquid crystal layer 13 toward the 1st glass substrate 11 sides in the both sides of clamping liquid crystal layer 13 is used as A side (the 1st side), and the side from liquid crystal layer 13 toward the 2nd glass substrate 12 sides is used as B side (the 2nd side).

Light source 22 and light guide sheet 23 constitute front lit.Front lit is located at the A side top of liquid crystal display device 1, and light guide sheet 23 with the light of 22 of light sources toward the irradiation of B side.Liquid crystal layer (display media) 13 for example is TN (two formula nematic phase of a turning round) liquid crystal, controls to incident and by the linearly polarized light light of itself, and the polarization direction is revolved and turn 90 degrees when making not making alive, and the polarization direction is constant during making alive.

The 1st polaroid (the 1st polarization means) 14 is located at the A side surface of the 1st glass substrate 11, and this polaroid has in accordance with regulations towards the axis of homology of setting, and only transmission becomes the light of the axial linearly polarized light component of transmission.When 14 incidents do not have polarized light to the 1st polaroid by front lit, form the axial linearly polarized light of transmission and the transmission that are parallel to the 1st polaroid 14.As the 1st polaroid 14, also extended the material that makes the absorber orientation thereby adopt high molecula resin film to sneak into absorbers such as iodine, bitintability dyestuff.As polarizer material, even the material beyond above-mentioned, so long as make no polarized light formation linearly polarized light, any material all can.The 2nd polaroid (the 2nd polarization means) 15 is located at the B side surface of the 2nd glass substrate 12, and the direction of its axis of homology is identical with the 1st polaroid 14.

A side surface in the 2nd glass substrate 12 is provided with polarized light selection reflector plate (selecting reflection means, polarized light to select reflection means) 16.Polarized light selects reflector plate 16 in the polarization direction of the linearly polarized light that incides itself when parallel with axis of reflection, the light of this light as the 1st polarization state (the 1st state, the 1st directional ray polarization state) is reflected, and in the polarization direction when parallel, with of the light transmission in addition of this light as the 2nd polarization state (the 2nd state, the 2nd directional ray polarization state) with the axis of homology.Polarized light selects the axis of reflection and the axis of homology of reflector plate 16 mutually orthogonal.Polarized light selects the axis of reflection of reflector plate 16 to be and the direction of the axis of homology quadrature of the 1st polaroid 14, and polarized light selects the axis of homology of reflector plate 16 parallel with the axis of homology of the 2nd polaroid 15 with the axis of homology of the 1st polaroid 14.Adopt the known polarization light of making by stacked polymeric membrane to select reflector plate in the present embodiment.The polarized light of another linearly polarized light reflection is selected reflector plate so long as make a linearly polarized light transmission, all can.

Color filter 17 is provided with 3 primary colours RGB components at the B side surface of the 1st glass substrate 11 respectively.Select reflector plate 16 to be located at and this color filter 17 opposed zones polarized light.Photomask 18 is adjacent with color filter 17, is located at and on-off element 20 and other opposed zone of connecting up, and covers the light from the A side toward the transmission of B side.

Transparency electrode 19 is located at the B side surface of color filter 17 on the 1st glass substrate 11 and photomask 18 and the A side surface that the polarized light on the 2nd glass substrate 12 is selected reflector plate 16 respectively.As transparent electrode material, adopt ITO (alloy of forming by indium oxide and tin oxide).As transparent electrode material, adopt other metal film with electric conductivity, also identical.In the present embodiment, record and narrate to adopt the example of the transparent electrode material of forming by metal, also can but the resin beyond the metal, semiconductor etc. have transparent material.Also can suitably having connects up connects the contact site 19a of usefulness.

On-off element 20 is for driving the active components such as TFT that each pixel is switched, being located at the A side surface of the 2nd glass substrate 12.Between on-off element 20 and the 2nd glass substrate 12, light absorbing zone 21 is set.

Liquid crystal display device 1 shown in Figure 1 is the display with double faces that can both watch demonstration from A side and B side, can both watch under all environment.When the A side of Fig. 1 was watched, the bright place of light intensity did not make front lit light outside, can utilize outer light to select the reflected light of reflector plate 16 to show at polarized light.The weak dark place of light is lighted front lit outside, and the light of reflection front lit shows on polarized light selection reflector plate 16.On the other hand, when the B side of Fig. 1 is watched, front lit is lighted, can be utilized outer light to select the transmitted light of reflector plate 16 to show at polarized light at bright place.In the dark, front lit is lighted, the light of transmission front lit shows on polarized light selection reflector plate 16.

Display packing when then, describing liquid crystal layer 13 in detail and be the TN layer with Fig. 2 and Fig. 3.

At first, the situation of watching from the A side with Fig. 2 explanation.Make no polarized light pass through the 1st polaroid 14, thereby form linearly polarized light as outer light and front lit light.The 1st polaroid 14 transmissions of Fig. 2 are the linearly polarized light of (parallel to paper) laterally.This linearly polarized light is by liquid crystal layer 13, thereby light rotates, and turns round to turn 90 degrees, and becomes the vertically linearly polarized light of (vertical to paper).When the axis of homology of setting the 1st polaroid 14 for and polarized light selected the axis of homology of reflector plate 16 parallel, linearly polarized light was turned round at liquid crystal layer 13 and is turn 90 degrees, and selected the axis of homology incident orthogonally of reflector plate 16 with polarized light.Like this, linearly polarized light is just selected the axis of reflection incident abreast of reflector plate 16 with polarized light.Be reflected with the linearly polarized light of axis of reflection incident abreast, turn round at liquid crystal layer 13 once more and turn 90 degrees, revert to original linearly polarized light, and penetrate the 1st polaroid 14.Make light turn back to the A side like this, thereby realize bright show state.

When applying voltage on the liquid crystal layer 13, remove reversing of liquid crystal layer 13, liquid crystal molecule becomes the 1st glass substrate 11 state vertical with the 2nd glass substrate 12.Outer light and front lit light are by the 1st polaroid 14, thus the formation linearly polarized light.This linearly polarized light keeps its former state ground by liquid crystal layer 13 because liquid crystal molecule becomes vertically.The axis of homology of the 1st polaroid 14 selects the axis of homology of reflector plate 16 parallel with polarized light, thereby linearly polarized light penetrates polarized light selection reflector plate 16.Because the axis of homology of the 2nd polaroid 15 selects the axis of homology of reflector plate 16 parallel with polarized light, and this linearly polarized light penetrates the 2nd polaroid 15, overflow again toward the B side of liquid crystal display device 1.Make light not return the A side like this, thereby realizing showing slinkingly show state.

Then, the situation of watching from the B side with Fig. 3 explanation.No polarized light as outer light and front lit light passes through the 1st polaroid 14, thereby forms linearly polarized light.The setting of each is identical with Fig. 2 among Fig. 3, and laterally the linearly polarized light of (parallel to paper) penetrates the 1st polaroid 14.This linearly polarized light is by liquid crystal layer 13, thereby light rotates, and turns round to turn 90 degrees, and becomes the vertically linearly polarized light of (vertical to paper).When the axis of homology of setting the 1st polaroid 14 for and polarized light selected the axis of homology of reflector plate 16 parallel, linearly polarized light was turned round at liquid crystal layer 13 and is turn 90 degrees, and selected the axis of homology incident orthogonally of reflector plate 16 with polarized light.Like this, linearly polarized light is just selected the axis of reflection incident abreast of reflector plate 16 with polarized light.Be reflected with the linearly polarized light of axis of reflection incident abreast, turn round at liquid crystal layer 13 once more and turn 90 degrees, be back into original linearly polarized light, and penetrate the 1st polaroid 14.Make light not be transmitted to the B side like this, thereby realizing showing slinkingly show state.

At this moment, light is from the incident of B side, and the 2nd polaroid 15 just makes this light become linearly polarized light, penetrates polarized light and selects reflector plate 16.Thus, this linearly polarized light is turned round at liquid crystal layer 13 and is turn 90 degrees, and becomes the linearly polarized light with the 1st polaroid 14 quadratures, is absorbed by the 1st polaroid 14.Like this, because different, liquid crystal layer 13 is only selected reflector plate 16 at B side configuration polarized light with prior art, to liquid crystal layer 13 not from the reflected light of A side.At this moment, after the incident of B side, penetrate the light of the 2nd polaroid 15,, turn back to the light of B side so be not subjected to polarized light to select reflector plate 16 reflections because of the absorption of the 2nd polaroid 15 does not comprise linearly polarized light with the direction of the 2nd polaroid 15 quadratures.

Therefore, the light of A side incident is used to show and showing slinkingly when the B side is watched shown under the state, the light of B side incident do not reflected back, thereby, can both deceive demonstration well not only at bright place but also at Liang Chu.

Then, when applying voltage on the liquid crystal layer 13, remove reversing of liquid crystal layer 13, liquid crystal molecule becomes the 1st glass substrate 11 state vertical with the 2nd glass substrate 12.Outer light and front lit light are by the 1st polaroid 14, thus the formation linearly polarized light.This linearly polarized light keeps its former state ground by liquid crystal layer 13 because liquid crystal molecule becomes vertically.The axis of homology of the 1st polaroid 14 selects the axis of homology of reflector plate 16 parallel with polarized light, thereby linearly polarized light penetrates polarized light selection reflector plate 16.Because the axis of homology of the 2nd polaroid 15 selects the axis of homology of reflector plate 16 parallel with polarized light, and this linearly polarized light penetrates the 2nd polaroid 15, overflow again toward the B side of liquid crystal display device 1.Like this, just realize bright show state.

Liquid crystal display device 1 has light absorbing zone 21, absorbs the light of advancing toward drive wire after the incident of B side at light absorbing zone 21, thereby eliminates the reflection from metal lines such as drive wires, can prevent to show slinkingly show appear in one's mind under the state white.Not only at the B of on-off element 20 side surface, and at the B of pixel drive line side surface, all can have this light absorbing zone 21.Can be to adding the such light absorbing zone of oblique line 21 among Figure 10, the B side surface in the zone of drive wires such as on-off element 20 and grid bus, source bus line, Cs bus is provided with light absorbing zone 21.

Handle as another antireflection, the also available low reflecting material that the light reflection is suppressed to below the ormal weight forms drive wires such as above-mentioned bus, has nothing to do with having or not above-mentioned light absorbing zone 21.So the light of advancing toward drive wire after the incident of B side is suppressed to reflection below the ormal weight by drive wire, thereby can eliminate the influence of drive wire reflection.

Here, will be illustrated in Fig. 4 as a comparison to the composition of liquid crystal layer 13 when A side and B side both sides are provided with polarized light and select reflector plate 16.The liquid crystal display device 2 of Fig. 4 has another polarized light in the 1st glass substrate 11 and selects reflector plate 16a between the 1st polaroid.The polarized light that will be equivalent to Fig. 1 selects the polarized light of reflector plate 16 to select reflector plate 16b to be located between the 2nd glass substrate 12 and the 2nd polaroid 15.Polarized light selects reflector plate 16a and polarized light to select reflector plate 16b identical.If each polaroid selects the axle setting of reflector plate identical with Fig. 2 and Fig. 3 with each polarized light, then show slinkingly and show under the state, the light of B side incident is after the 2nd polaroid 15 becomes linearly polarized light, penetrate polarized light and select reflector plate 16b, and after liquid crystal layer 13 revolves light to turn 90 degrees, select reflector plate 16a reflection at polarized light.This reflected light after liquid crystal layer 13 is subjected to 90 degree rotations, penetrates polarized light and selects reflector plate 16 and the 2nd polaroid 15 once more, turns back to the B side.

Utilize above-mentioned display method, liquid crystal display device 1 can be watched demonstration by two faces from A side and B side under all environment.Under the situation of above-mentioned composition, the demonstration on the A side realizes bright demonstration with the not alive state of liquid crystal layer 13, realizes showing slinkingly showing with liquid crystal layer 13 alive states.Demonstration on the B side is opposite with the A side, realizes showing slinkingly showing with the not alive state of liquid crystal layer 13, realizes bright demonstration with liquid crystal layer 13 alive states.Hence one can see that, and the demonstration on demonstration on the A side and the B side by its former state, makes bright dark (black and white) upset to same video data.

Therefore, in the present embodiment, driving circuit forms the bright dark circuit structure of upset mutually of the video data of the video data make the A side and B side.By forming the sort circuit structure, when the A side shows and B side when showing, can make to show bright dark mutual relationship unanimity.

In the liquid crystal display device of present embodiment, A side surface (liquid crystal board inboard) in the 2nd glass substrate 12 forms polarized light selection reflector plate 16, but liquid crystal display device 2 as Fig. 4, when selecting reflector plate 16 to be formed on the B side surface (the liquid crystal board outside) of the 2nd glass substrate 12 polarized light, also can obtain same effect.Under this situation, when producing the problem of parallax experienced that the thickness of the 2nd glass substrate 12 causes, the thickness by reducing the 2nd substrate 12 (be preferably less than or equal 0.3mmt) can be avoided.

Embodiment 2

Illustrate that according to Fig. 5 to Fig. 7 and Figure 53 to Figure 61 another embodiment of the present invention is as follows.To have with above-mentioned embodiment 1 in the component units of the component units identical functions said add identical symbol, omit its explanation.

The display device mounting device of two-sided display liquid LCD is loaded in the present embodiment explanation.

At first, example when display device mounting device is portable phone is described.

Mobile telephone has straight formula and collapsible two kinds.In recent years, because image receives and the expansion of display field, the fold type portable telephone terminal is becoming main flow.The fold type portable telephone terminal is used to remove folding state when conversing with data processing.As shown in Figure 5, wait for when receiving, remain on folded state.Under the folded state,, reverse side display AD is set, shows simple and easy information at this display in order to confirm clock and information such as incoming call to be arranged.Front display BD is positioned at the inboard of terminal.

Fig. 6 (a) and (b) illustrate the mobile telephone of the two-sided display liquid LCD (display device) 3 that uses present embodiment, and Fig. 7 illustrates the cross section of liquid crystal display device 3 and forms.

Shown in Fig. 6 (a), show and to converse and during the main information of data processing, BD shows in front display.When confirming to show, watch demonstration from the B side of Fig. 7 with front display BD.Watch under the situation of demonstration from the B side of Fig. 7, during outer light intensity, front lit is lighted, utilize the outer light of transmission to show, or front lit is lighted, transmission front lit light shows.When outer light is weak, front lit is lighted, transmission front lit light shows.Control bright show state and show slinkingly the switching of showing state with the impressed voltage of liquid crystal layer 13.

Shown in Fig. 6 (b), when using mobile telephone with folded state, AD confirms with the reverse side display.At this moment, watch demonstration from the A side of Fig. 7.During outer light intensity, front lit is lighted, utilized polarized light to select reflector plate 16 to make external light reflection and show.When outer light is weak, front lit is lighted, selected reflector plate 16 to make the reflection of front lit light and show with polarized light.Control bright show state and show slinkingly the switching of showing state with the impressed voltage of liquid crystal layer 13.

During bright demonstration (normal white display mode), select reflector plate 16 to make the incident light reflection with polarized light, thereby obtain bright show state.Show slinkingly and show normal black display mode) time, polarized light selects reflector plate 16 to make transmittance, do not circulate, thereby obtaining to show slinkingly shows state.When using mobile telephone with folded state, operating surface overleaf etc. are gone up reflection and are penetrated the light that polarized light is selected reflector plate 16, make its circulation.Therefore, showing slinkingly the black demonstration of showing state becomes quick condition (appearing in one's mind white), thereby might cause that contrast reduces.Outer light passes through liquid crystal display device 3 toward the circulation of A sides because of above-mentioned backside reflection etc., also form show slinkingly show appear in one's mind white.

In order to solve this point, as shown in Figure 7, liquid crystal display device 3 is at the B side surface configuration phase difference film 31 of the 2nd polaroid 15.This phase retardation film 31 is λ/4 films (λ/4 slice).Owing to have phase retardation film 31, the linearly polarized light that penetrates the 2nd polaroid 15 becomes circularly polarized light, and this circularly polarized light reflects on operating surface, once more by phase retardation film 31, thereby obtains linearly polarized light with the axis of homology quadrature of the 2nd polaroid 15.This linearly polarized light incides the 2nd polaroid 15, becomes parallelly with absorption axes, thereby is absorbed, and does not have the light circulation, can keep good showing slinkingly to show.

In the present embodiment, set forth by the B side surface at the 2nd polaroid 15 phase retardation film 31 is set, showing slinkingly of preventing that the backside reflection of operating surface etc. from causing shows that state appears white example in one's mind, but also the available light absorbent material is made operating surface etc.Be equipped with this absorber of light, make it insert and withdraw from, to absorb the light that finishes after the transmission of B side light path.Thus, can prevent to show slinkingly that to show that state appears in one's mind white, carry out good black demonstration.Also can be to enforcement antireflection processing such as operating surfaces.

Explanation prevents to show slinkingly when using mobile telephone with folded state to be shown and appears white method in one's mind.Shown in Figure 53, showing slinkingly when using mobile telephone with folded state shown because polarized light selects reflector plate 16 to make transmittance, do not make its circulation, obtains to show slinkingly and shows state.

Figure 54 illustrates the sectional view of Figure 53.Shown in Figure 54, by the light arrival operation side device 541 of liquid crystal display device 3.The composition structure of the side's of operation device 541 has various operation push-buttons 543 on operation side's substrate 542.The side's of operation substrate 542 is absorber of light or applies light absorption processing, thereby the side's of operation substrate 542 does not reflect light absorption past liquid crystal display device 3 sides circulation.Therefore, can obtain good black demonstration.Various operation push-buttons 543 grades of the side's of operation substrate 542 are carried out light absorption processing yet or form, thereby light do not circulate, obtain good black demonstration with absorber of light.

Among such embodiment that uses Figure 54 mentioned above, set forth by the side's of operation device 541 is become inboard equipment, display button when folding and carried out antireflection processing and prevent to show slinkingly and show and appear white example in one's mind.Yet aspect device design, various operation push-button 543 grades can not add man-hour as antireflection, by following like that folding display with double faces, also can prevent to show slinkingly show appear in one's mind white.

During from A side surface (AD) affirmation demonstration, as indicated above, preferably make to be configured to not cause light to circulate toward the A side because of reflection waits with the opposed face in the back side of A side surface.Yet, various operation push-buttons 543 grades of Figure 54 are not carried out antireflection and add man-hour, shown in Figure 55, can carry out antireflection processing to the inner surface of the face of the various operation push-buttons of configuration operation side's substrate 542 etc., and be configured to toward above-mentioned inner surface the B side surface (BD) of display with double faces folding.Thus, showing slinkingly of can preventing that the A side from showing show appear in one's mind white.

Mobile telephone shown in Fig. 6 (a) and (b) each display that when switching the watching of front display BD and reverse side display AD, overturns.Therefore, when showing when showing and with front display BD with reverse side display AD, utilize driving circuit make video data about upset, then when watching the opposing party after overturning about the side among front display BD and the reverse side display AD, can make display direction consistent with each other.Again, when showing when showing and with front display BD with reverse side display AD, utilize driving circuit to make spinning upside down of video data, when watching the opposing party after then the side among front display BD and the reverse side display AD being spun upside down, can make display direction consistent with each other.

Then, illustrate that the display device mounting device that loads two-sided display liquid crystal demonstration prime is the example of personal computer (hereinafter being designated as PC).

PC has two kinds of Desktop PC and notebook type PC.From the portable aspect of weight, the chance at place such as outdoor with notebook type PC walking is many.Figure 56 illustrates the composition when using two-sided display liquid LCD 3 in the notebook type PC formula.When carrying out the character input, shown in Figure 56 (a), use with the state of opening display with keyboard etc.When wait for receiving and importing, shown in Figure 56 (b), use with folded state without keyboard.When Figure 56 (a) carries out the character input with keyboard like that, show with front display 561.When wait for receiving and importing, show with the reverse side display without keyboard.

When using, watch demonstration from the B side of Fig. 7 with the state of Figure 56 (a).Watch from the B side under the situation of demonstration, during outer light intensity, front lit is lighted, utilize the outer light of transmission to show, or front lit is lighted, transmission front lit light shows.When outer light is weak, front lit is lighted, transmission front lit light shows.Control bright show state and show slinkingly the switching of showing state with the impressed voltage of liquid crystal layer 13.

Shown in Figure 56 (b), when using, confirm with reverse side display 562 with folded state.At this moment, watch demonstration from the A side of Fig. 7.During outer light intensity, front lit is lighted, utilized polarized light to select reflector plate 16 to make external light reflection and show.When outer light is weak, front lit is lighted, transmission front lit light is selected reflector plate 16 to make the reflection of front lit light and is shown with polarized light.Control bright show state and show slinkingly the switching of showing state with the impressed voltage of liquid crystal layer 13.

Among the notebook type PC shown in Figure 56 (a) and (b) at each display that when switching the watching of front display 561 and reverse side display 562, overturns.Therefore, when showing when showing and with front display 561 with reverse side display 562, utilize driving circuit make video data about upset, then when watching the opposing party after overturning about the side in front display 561 and the reverse side display 562, can make display direction consistent with each other.

When showing when showing with reverse side display 562 and with front display 561, if utilize driving circuit to make the upset of video data black and white, to show the video data of wishing, then front display 561 and reverse side display 562 can both be confirmed same demonstration.

Again, when showing when showing and with front display 561 with reverse side display 562, utilize driving circuit to make spinning upside down of video data, when watching the opposing party after then the side in front display 561 and the reverse side display 562 being spun upside down, can make display direction consistent with each other.

Among Figure 56 (a), Figure 56 (b), produce the demonstration upset of overturning about upset of video data black and white and image.Therefore, the such automatic operation push-button of signal of input indicated number upset is pushed automatic operation push-button in linkage with display opening and closing action, thereby is all exported the demonstration of wishing among Figure 56 (a) and Figure 56 (b) during configuration opening and closing display.

Except that the opening and closing display, also can with operation push-buttons such as switches video data be overturn arbitrarily.

In the composition structure of Figure 56, the material that constitutes keyboard and on ﹠ off switch etc. are formed all members carry out absorber of light processing and light absorption is processed.Thus, can prevent to show slinkingly on the reverse side display 562 and appear in one's mind whitely when showing, carry out good demonstration.

Show and appear white other method in one's mind as preventing that reverse side display 562 from showing slinkingly, at B side surface phase retardation film 31 is set as the 2nd polaroid 15 of the liquid crystal display device 3 of liquid crystal board shown in Figure 7, thus showing slinkingly of can preventing that backside reflection such as operating surface from causing show appear in one's mind white.By configuration make between the 2nd polaroid 15 of liquid crystal display device 3 and the 2nd glass substrate can 0 and λ/2 between switch the display device (not shown) of phase differential, also can prevent to show slinkingly show appear in one's mind white.

Then, illustrate that the display device mounting device that loads two-sided display liquid LCD 3 is the example of portable terminal device (PDA, portable game).Figure 57 illustrates the composition when using two-sided display liquid LCD 3 in the portable terminal device.

Operate with grouping key etc., as Figure 57 (a), use display with the state of opening.Wait for when importing when receiving and without grouping key, as Figure 57 (b), use with folded state.When operating with grouping key like that shown in Figure 57 (a), show with front display 571.Under the situation about importing when wait for receiving and without grouping key, show with reverse side display 572.

When using, watch demonstration from the B side of Fig. 7 with the state of Figure 57 (a).Watch under the situation of demonstration from the B side of Fig. 7, during outer light intensity, front lit is lighted, utilize the outer light of transmission to show, or front lit is lighted, transmission front lit light shows.When outer light is weak, front lit is lighted, transmission front lit light shows.Control bright show state and show slinkingly the switching of showing state with the impressed voltage of liquid crystal layer 13.

Shown in Figure 57 (b), when using, confirm with reverse side display 572 with folded state.At this moment, watch demonstration from the A side of Fig. 7.During outer light intensity, front lit is lighted, utilized polarized light to select reflector plate 16 to make external light reflection and show.When outer light is weak, front lit is lighted, selected reflector plate 16 to make the reflection of front lit light and show with polarized light.Control bright show state and show slinkingly the switching of showing state with the impressed voltage of liquid crystal layer 13.

Portable terminal device shown in Figure 57 (a) and (b) each display that when switching the watching of front display 571 and reverse side display 572, overturns.Therefore, when showing when showing and with front display 571 with reverse side display 572, utilize driving circuit make video data about upset, then when watching the opposing party after overturning about the side in front display 571 and the reverse side display 572, can make display direction consistent with each other.

When showing when showing with reverse side display 572 and with front display 571, if utilize driving circuit to make the upset of video data black and white, to show the video data of wishing, then front display 571 and reverse side display 572 can both be confirmed same demonstration.

Again, when showing when showing and with front display 571 with reverse side display 572, utilize driving circuit to make spinning upside down of video data, when watching the opposing party after then the side in front display 571 and the reverse side display 572 being spun upside down, can make display direction consistent with each other.

Among Figure 57 (a), Figure 57 (b), produce the demonstration upset of overturning about upset of video data black and white and image.Therefore, the such automatic operation push-button of signal of input indicated number upset is pushed automatic operation push-button in linkage with display opening and closing action, thereby is all exported the demonstration of wishing among Figure 57 (a) and Figure 57 (b) during configuration opening and closing display.

In the composition structure of Figure 57, the material that constitutes keyboard and on ﹠ off switch etc. are formed all members carry out absorber of light processing and light absorption is processed.Thus, can prevent to show slinkingly on the reverse side display 572 and appear in one's mind whitely when showing, carry out good demonstration.

Show and appear white other method in one's mind as preventing that reverse side display 572 from showing slinkingly, at B side surface phase retardation film 31 is set as the 2nd polaroid 15 of the liquid crystal display device 3 of liquid crystal board shown in Figure 7, thus showing slinkingly of can preventing that backside reflection such as operating surface from causing show appear in one's mind white.By configuration make between the 2nd polaroid 15 of liquid crystal display device 3 and the 2nd glass substrate can 0 and λ/2 between switch the display device (not shown) of phase differential, also can prevent to show slinkingly show appear in one's mind white.

Then, illustrate that the display device mounting device that loads two-sided display liquid LCD 3 is the example of video display devices such as televisor, monitor.Figure 58 illustrates the composition when using two-sided display liquid LCD 3 in the televisor.

Shown in Figure 58 (a), when confirming video, watch demonstration from the B side of Fig. 7 with front display 581.Watch from the B side under the situation of demonstration, during outer light intensity, front lit is lighted, utilize the outer light of transmission to show, or front lit is lighted, transmission front lit light shows.When outer light is weak, front lit is lighted, transmission front lit light shows.Control bright show state and show slinkingly the switching of showing state with the impressed voltage of liquid crystal layer 13.

Shown in Figure 58 (b), when showing affirmation, watch demonstration from the A side of Fig. 7 with reverse side display 582.During outer light intensity, front lit is lighted, utilized polarized light to select reflector plate 16 to make external light reflection and show.During outer light intensity, worry to show slinkingly and show and appear in one's mind whitely, thereby block the lid 583 of Figure 58 (b),, can confirm good demonstration even outer light intensity does not show slinkingly yet and shows and appear in one's mind whitely by front display 581.The composition material of this lid 583 adopts has the light absorption materials with function.Figure 59 illustrates 583 the state that covers that covers, and Figure 60 is the figure that sees this state from the televisor side.As we know from Figure 60, lid 583 can be rotated a lateral margin of televisor as axle.

Show and appear white other method in one's mind as preventing that reverse side display 582 from showing slinkingly, at B side surface phase retardation film 31 is set as the 2nd polaroid 15 of the liquid crystal display device 3 of liquid crystal board shown in Figure 7, thus showing slinkingly of causing of the backside reflection that can prevent to cover etc. show appear in one's mind white.

Even shielding cover 583, by configuration make between the 2nd polaroid 15 of liquid crystal display device 3 and the 2nd glass substrate can 0 and λ/2 between switch the display device (not shown) of phase differential, also can prevent to show slinkingly show appear in one's mind white.

Again, when outer light is weak, front lit is lighted, selected reflector plate 16 to make the reflection of front lit light and show with polarized light.Control bright show state and show slinkingly the switching of showing state with the impressed voltage of liquid crystal layer 13.

When the demonstration of reverse side display 582 is confirmed in the place of the room in darkroom a little less than the light and so on and the front display 581 sides unreflecting objects of configuration (except that liquid crystal board) outside, even not closed lid 583 with light absorption, also demonstration can be watched, thereby 583 opening and closing can be covered according to the brightness of outer light.

Televisor shown in Figure 58 (a) and (b) each display that when switching the watching of front display 581 and reverse side display 612, overturns.Therefore, when showing when showing and with front display 581 with reverse side display 582, utilize driving circuit make video data about upset, then when watching the opposing party after overturning about the side in front display 581 and the reverse side display 582, can make display direction consistent with each other.

When showing when showing with reverse side display 582 and with front display 581, if utilize driving circuit to make the upset of video data black and white, to show the video data of wishing, then front display 581 and reverse side display 582 can both be confirmed same demonstration.

Again, when showing when showing and with front display 581 with reverse side display 582, utilize driving circuit to make spinning upside down of video data, when watching the opposing party after then the side in front display 581 and the reverse side display 582 being spun upside down, can make display direction consistent with each other.

Among Figure 58 (a), Figure 58 (b) owing to show the black and white upset, image also about upset, available demonstration change-over switch 584 grades make the video data upset, so that can watch the demonstration of hope.

Then, illustrate the display device mounting device that loads two-sided display liquid LCD 3 be digital camera, take the photograph (as) record (as) portable video such as machine shows the example that (video/reproductions) installs.Figure 61 illustrates the composition when using two-sided display liquid LCD 3 in the digital camera.

Shown in Figure 61 (a), when confirming video, watch demonstration from the B side of Fig. 7 with front display 611.Watch from the B side under the situation of demonstration, during outer light intensity, front lit is lighted, utilize the outer light of transmission to show, or front lit is lighted, transmission front lit light shows.When outer light is weak, front lit is lighted, transmission front lit light shows.Control bright show state and show slinkingly the switching of showing state with the impressed voltage of liquid crystal layer 13.

Shown in Figure 61 (b), when showing affirmation, watch demonstration from the A side of Fig. 7 with reverse side display 612.During outer light intensity, front lit is lighted, utilized polarized light to select reflector plate 16 to make external light reflection and show.During outer light intensity, worry to show slinkingly and show and appear in one's mind whitely, thereby go up the lid 613 of Figure 61 (b),, can confirm good demonstration even outer light intensity does not show slinkingly yet and shows and appear in one's mind whitely by front display 611 covers.The composition material of this lid 613 adopts has the light absorption materials with function.

Anti-when using with the state to digital camera cover loam cake 613 with above-mentioned Figure 60 explanation shows slinkingly to be shown and appears white method in one's mind.The front display 581 of Figure 60 is taken as front display 611, and reverse side display 582 is taken as reverse side display 612, and lid 583 is taken as and covers 613.Select reflector plate 16 by making light penetrate polarized light, do not circulate, state is shown in showing slinkingly when obtaining to use with the state to digital camera cover loam cake 613 as shown in Figure 60.

Shown in Figure 60, display 612 arrives the light that covers 613 sides by the light of liquid crystal display device 3 from the negative, because lid 613 is light display medias or carried out light absorption processing that the substrate of tegmentum side absorbs, and is not reflected, not toward LCD 3 sides circulation.Therefore, can obtain good black demonstration.

Show and appear white other method in one's mind as preventing that reverse side display 612 from showing slinkingly, at B side surface phase retardation film 31 is set as the 2nd polaroid 15 of the liquid crystal display device 3 of liquid crystal board shown in Figure 7, thus can prevent to cover the reflection of face of 613 etc. causes show slinkingly show appear in one's mind white.

Even do not cover loam cake 613, by configuration make between the 2nd polaroid 15 of liquid crystal display device 3 and the 2nd glass substrate can 0 and λ/2 between switch the display device (not shown) of phase differential, also can prevent to show slinkingly show appear in one's mind white.

When the demonstration of reverse side display 612 is confirmed in the place of the room in darkroom a little less than the light and so on and the front display 611 sides unreflecting objects of configuration (except that liquid crystal board) outside, even not closed lid 613 with light absorption, also demonstration can be watched, thereby 613 opening and closing can be covered according to the brightness of outer light.

Digital camera shown in Figure 61 (a) and (b) each display that when switching the watching of front display 611 and reverse side display 612, overturns.Therefore, when showing when showing and with front display 611 with reverse side display 612, utilize driving circuit make video data about upset, then when watching the opposing party after overturning about the side in front display 611 and the reverse side display 612, can make display direction consistent with each other.

When showing when showing with reverse side display 612 and with front display 611, if utilize driving circuit to make video data black in upset, to show the video data of wishing, then front display 611 and reverse side display 612 can both be confirmed same demonstration.

Again, when showing when showing and with front display 611 with reverse side display 612, utilize driving circuit to make spinning upside down of video data, when watching the opposing party after then the side in front display 611 and the reverse side display 612 being spun upside down, can make display direction consistent with each other.

Among Figure 61 (a), Figure 61 (b) owing to show the black and white upset, image also about upset, available demonstration change-over switch 614 grades make the video data upset, so that can watch the demonstration of hope.

In the present embodiment, set forth the example when adopting two-sided display liquid LCD 3 in portable phone, notebook type PC, portable terminal device, televisor, the digital camera, but can in all over products that is equipped with liquid crystal display device 3, adopt.

For example, be used for being located at the wizard screen of automobile, can by by day with make the bright dark upset of display screen evening, be convenient to watch.Again, when using as two-sided televisor, by embedding the boundary part (for example wall) in two rooms (for example living room and bedroom), an available televisor is as the televisor in two rooms.When using as game machine, display device can be risen, fight person's two sides face-off in table is respectively played.Especially Othello's recreation, go etc., even the black and white state also can play, unaffected in fact.The display device that also can be used for wrist-watch.

Embodiment 3

Illustrate that according to Fig. 8 the another embodiment of the present invention is as follows.To having the identical symbol of component units mark of the component units identical functions of saying with above-mentioned

embodiment

1 and 2, omit its explanation.

Fig. 8 illustrates the cross section of the liquid crystal display device (display device) 4 of present embodiment and forms.Liquid crystal display device 4 is implemented in the display with double faces that A side and B have good color rendition by disposing color filter up and down.

Liquid crystal display device 4 also has color filter (the 2nd color filter) 17b between the 2nd glass substrate 12 and polarized light reflector plate 16 except that the color filter with the color filter 17 that is equivalent to liquid crystal display device 3 among Fig. 7 (the 1st color filter) 17a.

When the A of liquid crystal display device 4 side shows, utilize polarized light reflector plate 16 to show by reflection-type.When the B side shows, carry out transmission-type with the 1st polaroid 14, polarized light reflector plate 16 and the 2nd polaroid 15 and show.During the reflection-type of A side showed, when bright show state, the 1st polaroid 14, color filter 17a, liquid crystal layer 13 incided polarized light reflector plate 16 successively from the light of A side incident.Then, after reflection on the polarized light reflector plate 16, shine the A side by liquid crystal layer 13, color filter 17a, the 1st polaroid 14 once more.Owing to show with reflection, incident light passes through color filter 17a 2 times.Therefore, brightness reduces during the color filter thickness of normal transmissive liquid crystal display device, causes that display quality descends.The thickness of the color filter 17a of Fig. 8 reduces in order to prevent above-mentioned display quality, sets below 1/2 of transmission-type liquid crystal display device for.Thus, even Zong also can obtain colored linearity and the brightness equal by color filter 17a 2 times with transmission.

In order to carry out the demonstration of B side with transmission, successively by the 1st polaroid 14, color filter 17a, liquid crystal layer 13, polarized light reflector plate 16, color filter 17b, the 2nd polaroid 15, phase retardation film 31 shine the B side, thereby realize bright show state from the light of A side incident.When color filter 17a is used for the reflection-type demonstration, thickness is little, thereby the colour that only carries out transmission with this color filter 17a is when showing, the color rendition scope is little, but by lower floor color filter 17b is set, realizes and the equal color rendition of transmission-type liquid crystal display device at polarized light reflector plate 16.Form color filter 17b, making its thickness is below 1/2 of transmission-type liquid crystal display device.Thus, the color filter 17a of A side and the color filter 17b of B side are respectively passed through once, thereby can realize the color rendition equal with transmission-type liquid crystal display device.

Like this, according to liquid crystal display device 4, because the concentration of individual settings each

color filter

17a, 17b, reflection-type demonstration and the transmission-type on the B side that can press respectively on the A side show suitable brightness and the color rendition set.

Embodiment 4

Illustrate that according to Fig. 9 and Figure 10 the another embodiment of the present invention is as follows.To having the identical symbol of component units mark of the component units identical functions of saying with above-mentioned embodiment 1 to 3, omit its explanation.

Fig. 9 illustrates the cross section of the liquid crystal display device (display device) 5 of present embodiment and forms.Liquid crystal display device 5 usefulness 1 metafiltration color chips realizes having good color rendition display with double faces.

Liquid crystal display device 5 comprises the color filter 32 that each pixel has the 2nd district (high-transmission rate district) 32b that is provided with on the position of the photomask 18 that the 1st district (low transmissivity district) 32a is set on the position that is equipped with color filter 17 in Fig. 7 liquid crystal display device 3 and is equipped with Fig. 7.Figure 10 illustrates the composition of color filter 32 with vertical view.The color filter of liquid crystal display device 3 is 1 metafiltration color chips 32.Have and be arranged to select reflector plate (selecting reflection means, polarized light to select reflection means) 33, select reflector plate 16 with the polarized light that replaces liquid crystal display device 3 with whole above-mentioned color filter 32 opposed polarized lights.Polarized light selects reflector plate 33 and polarized light to select reflector plate 16 optical characteristics identical, but according to above-mentioned configuration, not only is arranged on the zone of Fig. 7, and be arranged on the on-off element 20 with bus on.

As implement described in the mode 3, only have in the A side under the situation of 1 color filter, be used as reflection-type when the A side is watched, in the bright show state, light 2 times is by color filter, but is used as transmission-type when the B side is watched, in the bright show state, light only 1 time by color filter, thereby, littler when the A side is watched than light quantity when the B side is watched.

There are metal electrode and metal line on the on-off element 20 He on the bus, so light does not pass through.Therefore, present embodiment is used this zone of transmission-type not being had contribution in the viewing area of watching from the A side.In the color filter 32, show as reflection-type at A side and opposed the 2nd transmissivity district 32b of this non-transmission area, make its thickness little or concentration is light, form the colour filter section that transmissivity improves, its transmissivity is than the 1st transmission area 32a height.Set the area of the 2nd transmissivity district 32b, and become brightness that the reflection-type on the A side shows and color rendition and reflective type liquid crystal display device equal with the 1st transmissivity district 32a.Therefore, the transmissivity of color filter 32 changes on area.

The 1st transmission area 32a is adjusted to thickness and concentration to watch from the B side to form when showing and the equal brightness of transmission-type liquid crystal display device and the transmission-type colour filter section of color rendition.By adjusting the area ratio of this 1st transmission area 32a and the 2nd transmission area 32b, can realize when the B side is watched and equal range of color reproduction and the brightness of transmission-type liquid crystal display device.

Like this, LCD 5 according to present embodiment, with 1 metafiltration color chips, 32 appropriate combination and by a plurality of different transmissivity districts, make its situation corresponding to the different light quantities that produce in reflection-type and the transmission-type, thus the reflection-type on the A side shows and the B side on transmission-type show suitable brightness of each self energy and color rendition.Here, can provide have concurrently on the A side with the equal color rendition of reflective type liquid crystal display device and brightness, B side on the equal color rendition of transmission-type liquid crystal display device and the display with double faces of brightness.

Embodiment 5

Illustrate that according to Figure 11 to Figure 14 the another embodiment of the present invention is as follows.To having the identical symbol of component units mark of the component units identical functions of saying with above-mentioned embodiment 1 to 4, omit its explanation.

In the embodiment 1 to 4, illustrated that polarized light selection reflector plate 16,33 uses the example of azide polymer tunics, but available theory selects reflector plate also identical with other polarized light.The following describes polarized light selects reflector plate to use the situation of cholesteric crystal.

Figure 11 illustrates the cross section of the liquid crystal display device (display device) 6 of present embodiment and forms.

Liquid crystal display device 6 has the 1st glass substrate the 11, the 2nd glass substrate the 12, the 3rd polaroid the 41, the 4th polaroid 42, polarized light and selects the 44, the 2nd λ/4, reflector plate the 43, the 1st λ/4 slices 45, liquid crystal layer 46, light source 33 and light guide sheet 23.Form the structure of clamping liquid crystal layer 46 between the 1st glass substrate 11 and the 2nd glass substrate 12, as A side (the 1st side), the side from liquid crystal layer 46 toward the 2nd glass substrate 12 is as B side (the 2nd side) with the side from liquid crystal layer 46 toward the 1st glass substrate 11 in the both sides of clamping liquid crystal layer 46.Color filter 17, photomask 18, transparency electrode 19, on-off element 20, light absorbing zone 21 that not shown Fig. 1 is such can suitably be set.

The front lit that constitutes by light source 22 and light guide sheet 23 in the setting of the A of liquid crystal display device 6 side top.Liquid crystal layer (display media) is that optical path difference Δ nd is the parallel alignment type nematic liquid crystal layer of λ/2.The circularly polarized light that passes through after 46 pairs of incidents of liquid crystal layer control circular polarization state, not making right circular polarization during making alive is that left, left are right circularly polarized control, makes the constant control of circular polarization during making alive.

The 3rd polaroid (the 1st axis of homology polarization means) 41 is located at the A side of the 1st glass substrate 11, this polaroid have the regulation set for towards the axis of homology, only transmission becomes the light (axis of homology direction hereinafter is described) of the linear polarization component of transmission direction.Material can be identical with the 2nd polaroid 15 with the 1st polaroid 14 of Fig. 1.When the light of no polarization incides the 3rd polaroid 41 by front lit, become and be parallel to the axial linearly polarized light of the 3rd polaroid 41 transmissions and penetrate this polaroid.The 4th polaroid (the 2nd axis of homology polarization means) 42 is located at the B side of the 2nd glass substrate 12, is axis of homology direction and the 3rd polaroid 41 quadratures and the identical polaroid of material.

Polarized light selects reflector plate (selecting reflection means, polarized light to select reflection means) 43 to be made up of cholesteric liquid crystal film, is the left-hand screw cholesteric crystal reflector plate that the left light of incident is reflected.Make the right-hand circularly polarized light transmission.Here, this is in the situation of left state as the 1st circular polarization state (the 1st state, the 1st polarization state).With light be in sense of rotation for the situation of reverse right circularly polarized state as the 2nd circular polarization state (the 2nd state, the 2nd polarization state).

The 1st λ/4 slices 44 are located between the 3rd polaroid 41 and the 1st glass substrate 11, and making from the linearly polarized light of the 3rd polaroid 41 incidents is circular polarization, and to make from the circularly polarized light of liquid crystal layer 46 incidents be linear polarization.The 2nd λ/4 slices 45 are located between the 2nd polaroid 12 and the 4th polaroid 42, and making from the circularly polarized light of the 2nd glass substrate 12 incidents is linear polarization, and to make from the linearly polarized light of the 4th polaroid 42 incidents be circular polarization.

Then, illustrate from watching of A side and watching with Figure 11 and Figure 12 from the B side.

At first, the situation of watching from the A side of Figure 11 is described.No polarized light as outer light and front lit light passes through the 3rd polaroid 41, thereby becomes linearly polarized light.As shown in figure 13, the axis of homology of the 3rd polaroid 41 is set for+45 degree (with 12 o'clock of clock as 0 degree and toward right rotation be used as+), thereby the light of transmission becomes+linearly polarized lights of 45 degree.This linearly polarized light is the 1st λ/4 slices 44 of 0 degree by the axle that lags behind, thereby becomes right-hand circularly polarized light as shown in figure 13.Then, be that 0 degree and Δ nd are the liquid crystal layer 46 that the parallel alignment type nematic liquid crystal layer of λ/2 is formed by the liquid crystal aligning axle, thereby right polarized light become left polarized light when making alive not.Polarized light is selected the circularly polarized light reflection of reflector plate 43 with incident.Polarized light selects the left light of reflector plate 43 reflections once more by liquid crystal layer 46, thereby becomes right-hand circularly polarized light.This right-hand circularly polarized light is once more by the 1st λ/4 slices 44, thereby becomes linearly polarized light.This linearly polarized light penetrates the 3rd polaroid 41, realizes bright show state.

When applying voltage on the liquid crystal layer 46, liquid crystal molecule forms vertical to the 1st glass substrate 11 and the 2nd glass substrate 12, make Δ nd=0.No polarized light as outer light and front lit light passes through the 3rd polaroid 41, thereby becomes+45 linearly polarized lights of spending.This linearly polarized light is the 1st λ/4 slices 44 of 0 degree by the axle that lags behind, thereby becomes right-hand circularly polarized light.Make this right-hand circularly polarized light by liquid crystal layer 46 with keeping intact.Polarized light selects reflector plate 43 to make right-hand circularly polarized light transmission in statu quo.This right-hand circularly polarized light becomes+135 degree linearly polarized lights by the 2nd λ/4 slices 45, and be transmission on+135 the 4th polaroids 42 of spending at the axis of homology, as shown in figure 13.Thus, can make light not return the A side, realize showing slinkingly showing state.

Then, be set forth in the situation that the B side of Figure 12 is watched.As the no polarized light of outer light and front lit light by the 3rd polaroid 41, thereby become+linearly polarized lights of 45 degree, this linearly polarized light is by the 1st λ/4 slices 44, thereby become right-hand circularly polarized light, then, by liquid crystal layer 46, thereby right-hand circularly polarized light becomes left light when making alive not.Polarized light selects reflector plate 43 with the reflection of left light, and the left light of reflection by liquid crystal layer 46, becomes right-hand circularly polarized light once more.Right-hand circularly polarized light by the 1st λ/4 slices 44, becomes linearly polarized light once more.This linearly polarized light penetrates the 3rd polaroid 41, thereby makes light not arrive the B side, realizes showing slinkingly showing state.

On the other hand, at this moment establish the light of existence from the incident of B side, then the 4th polaroid 42 becomes+45 degree linearly polarized lights this light, and the 2nd λ/4 slices 45 make it become right-hand circularly polarized light.Therefore, this light penetrates polarized light and selects reflector plate 43, thereby the control of liquid crystal layer 46 makes it become left light, by the 1st λ/4 slices 44, becomes+linearly polarized lights of 45 degree.Therefore, this light is absorbed by the 3rd polaroid.According to condition, also can produce+135 linearly polarized lights of spending, be penetrated into the A side.

Different with prior art, liquid crystal layer 46 is only selected reflector plate 43 at B side configuration polarized light, thereby liquid crystal layer 46 is not had from A lateral reflection light.At this moment, incide the 2nd λ/4 slices 45 once more, become+linearly polarized lights of 45 degree, thereby absorbed by the 2nd polaroid from the incident of B side and at the light of reflections such as the metal line that drives liquid crystal layer 46.

Therefore, the light of A side incident is used to show and showing slinkingly when the B side is watched shown under the state, can makes from the light of B side incident not reflect, thereby not only in the dark but also at Liang Chu, black demonstration is all good.As a result, liquid crystal display device 6 becomes in bright place and dark place and can both deceive the double-sided display escope spare that shows well.

When applying voltage on the liquid crystal layer 46, liquid crystal molecule forms vertical to the 1st glass substrate 11 and the 2nd glass substrate 12, make Δ nd=0.No polarized light as outer light and front lit light passes through the 3rd polaroid 41, thereby becomes+45 linearly polarized lights of spending.This linearly polarized light is by the 1st λ/4 slices 44, thereby becomes right-hand circularly polarized light.Make this right-hand circularly polarized light by liquid crystal layer 46 with keeping intact.Polarized light selects reflector plate 43 to make right-hand circularly polarized light transmission in statu quo.This right-hand circularly polarized light becomes+135 degree linearly polarized lights by the 2nd λ/4 slices 45, and transmission on the 4th polaroid 42.Thus, can make light not return the A side, realize bright show state.

Then, adopting the polarized light of above-mentioned cholesteric crystal to select reflector plate 43 can make azide polymer stratotype polarized light select the thickness of reflector plate is below 1/10, easily the thickness of control module.With Figure 14 this point is described.

As shown in figure 14, when polarized light selected reflector plate (selecting reflection means, polarized light to select reflection means) 50 with the macromolecule lamination, thickness was 150 μ m ~ 200 μ m.Therefore, in order to control thickness of slab, after applying the encapsulant 51 of thermosetting resin around the plate, wadding 52 is sneaked into by portion within it, makes plate become specific thickness.In the present embodiment,, in encapsulant 51, sneak into glass fibre as wadding 52.After applying encapsulant 51, with the pattern bond one-tenth unification up and down of glass substrate up and down.Then, one side is by desirable condition pressurization, and the temperature that simultaneously raises makes encapsulant 51 sclerosis.At this moment, as shown in figure 14, has polarized light toward inboards when selecting reflector plate 50 from encapsulant 51, encapsulant 51 is applied into 150 μ m ~ 200 μ m, very thick, thus when pressurization produce extending transverselyly, exist encapsulant 51 to expand to the problem of viewing area outward toward desired areas.Select reflector plate 50 with respect to polarized light, liquid crystal layer (display media) 53 extremely thin (a few μ m), encapsulant are 51 thick (during 150 μ m ~ 200m), even insert wadding 54 in the unit, also to be difficult to liquid crystal layer 53 is controlled to the thickness of hope because of the deviation of operation.

Again, as shown in figure 14, the polarized light that connects liquid crystal layer 53 is selected the outermost surface unevenness of reflector plate 50, thereby liquid crystal layer is controlled to a few μ m is subjected to influence as the surface of substrate, very difficulty.

Therefore, select reflector plate 50 to adopt cholesteric crystal, reduce thickness, can carry out the THICKNESS CONTROL of liquid crystal layer 46 easily by polarized light.

So far, set forth embodiment 1 to 5.According to liquid crystal display device of the present invention, select reflector plate and front lit mode by using polarized light, just can under all environment, carry out good watching with a liquid crystal display device from two-sided (positive, reverse side).Therefore, can provide have concurrently thin, light, cost is low, enlarge the liquid crystal display device of many advantages such as display area of simple and easy display screen.

Embodiment 6

Illustrate that according to Figure 16 to Figure 18 the another embodiment of the present invention is as follows.To having the identical symbol of component units mark of the component units identical functions of saying with above-mentioned embodiment 1 to 5, omit its explanation.

Figure 16 illustrates the cross section of the liquid crystal display device (display device) 7 of present embodiment and forms.

Liquid crystal display device 7 has the 1st glass substrate the 11, the 2nd glass substrate 12, liquid crystal layer the 13, the 1st polaroid the 14, the 2nd polaroid 15, polarized light selection reflector plate 16, color filter 171a and 171b, photomask 18, transparency electrode 19, on-off element 20, light source 22, light guide sheet 23, reflector plate 161 and insulating resin layer 162.Form the structure of clamping liquid crystal layer 13 between the 1st glass substrate 11 and the 2nd glass substrate 12, side from liquid crystal layer 13 toward the 1st glass substrate 11 sides in the both sides of clamping liquid crystal layer 13 is used as A side (the 1st side), and the side from liquid crystal layer 13 toward the 2nd glass substrate 12 sides is used as B side (the 2nd side).

On-off element 20 is located at the A side surface of the 2nd glass substrate 12, and this element is for driving the active components such as TFT that each pixel is switched.

The light of 161 pairs of incidents of reflector plate (reflection means) reflects, and does not rely on this polarized state of light.Among Figure 16, it is arranged between on-off element 20 and bus and the liquid crystal layer 13, the light by liquid crystal layer 13 reflexes to the A side from the A side toward the B side.Being located at the on-off element 20 between liquid crystal layer 13 and the 2nd glass substrate and the zone of bus is the non-transmission area of light.Insulating resin layer 162 is located on whole the 2nd glass substrate 12, covers on-off element 20 and bus side.Reflector plate 161 is located on this insulating resin layer 162, opposed with at least a portion of above-mentioned non-transmission area.Here,, micro concavo-convex is set at insulating resin layer 162 in order to improve the visuality of reflector plate 161, and the reflector plate dip stratum is folded thereon, thus have the concavo-convex micro concavo-convex that reflects insulating resin layer 162.

As the material of reflector plate 161, can enumerate aluminium alloy, the silver of aluminium, titaniferous, the silver alloy that contains palladium, copper etc.And, when for example reflector plate 161 uses aluminium (Al),, can adopt the structure that forms the Al/Mo of Al on molybdenum (Mo) film for fear of producing galvanic corrosion because of getting with the direct contacting structure of ITO contact portion in the developing procedure of Al.Continuous stacked Mo (1000 dust) and Al (1000 dust) in this structure, and then with mordant simultaneously etching Mo and Al, thus can carry out the design producing of reflector plate 16.

In the present embodiment, reflector plate 161 is used as reflection means, but is not limited thereto the reflector plate on the also available flat board etc.In order to have and reflector plate 161 equivalent reflection characteristics, usable surface is provided with the member of light-scattering body.

Light source 22 and light guide sheet 23 constitute front lit.Front lit is located at the A side top of liquid crystal display device 7, light guide sheet 23 with the light of 22 of light sources toward the irradiation of B side.Liquid crystal layer (display media) 13 for example is ECB (Electrical controlled birefringence: liquid crystal electrically conerolled birefringence), to inciding the specific light that this passes through after one's death, control is fixed on the phase differential between each component of polarized light orthogonal axes in the face parallel with the 1st glass substrate 11 and the 2nd glass substrate 12.Here, with liquid crystal layer 13 making alive or add under the state of enough low voltage not, the phase differential during from 14 incidents of the 1st polaroid is taken as 0, and the end point of passing through of the light from the 1st polaroid 14 toward reflector plate 161 is pi/2 roughly.So, make from reflector plate 161 light toward the 1st polaroid 14 pass through phase differential on the end point select for π roughly, from the 1st polaroid 14 toward polarized light reflector plate 16 light pass through that phase differential is the roughly control of π on the end point.Applying under the state of sufficiently high voltage on the liquid crystal layer 13 again, making the control that above-mentioned phase differential is constant, polarization state is also constant of the light that passes through.In the above-mentioned explanation, phase differential is labeled as " roughly " in advance, this is because comprise the situation that voltage application and releasing are not followed in the lifting of the part molecule of liquid crystal layer 13.

In order to carry out the control of above-mentioned polarization state, the polarized light that is in the liquid crystal layer 13 (hereinafter being called the reflector plate setting area) between the 1st polaroid 14 and the reflector plate 161 and is in the 1st polaroid 14 and is not opposite to reflector plate 161 is selected the liquid crystal layer 13 (hereinafter being called non-reflector plate setting area) between the reflector plate 16, and its ratio from the direction thickness (hereinafter the thickness with display media (liquid crystal layer) is called element thickness) that connects A side and B side is configured to roughly 1 to 2.Being taken as roughly 1 to 2 is because reflector plate 161 has micro concavo-convex on its surface in the reflector plate setting area, and considers this concavo-convex element thickness deviation that causes.

The 1st polaroid (the 1st polarization means) 14 is located at the A side surface of the 1st glass substrate 11, and this polaroid has in accordance with regulations towards the axis of homology of setting, and only transmission becomes the light of the axial linearly polarized light component of transmission.When 14 incidents do not have polarized light to the 1st polaroid by front lit, form the axial linearly polarized light of transmission and the transmission that are parallel to the 1st polaroid 14.As the 1st polaroid 14, also extended the material that makes the absorber orientation thereby adopt high molecula resin film to sneak into absorbers such as iodine, bitintability dyestuff.As polarizer material, even the material beyond above-mentioned, so long as make no polarized light formation linearly polarized light, any material all can.The 2nd polaroid (the 2nd polarization means) 15 is located at the B side surface of the 2nd glass substrate 12, the direction of its axis of homology and the 1st polaroid 14 quadratures.

A side surface in the 2nd glass substrate 12 is provided with polarized light selection reflector plate (selecting reflection means, polarized light to select reflection means) 16.Polarized light selects reflector plate 16 in the polarization direction of the linearly polarized light that incides itself when parallel with axis of reflection, the light of this light as the 1st polarization state (the 1st state, the 1st directional ray polarization state) is reflected, and in the polarization direction when parallel, with of the light transmission in addition of this light as the 2nd polarization state (the 2nd state, the 2nd directional ray polarization state) with the axis of homology.Polarized light selects the axis of reflection and the axis of homology of reflector plate 16 mutually orthogonal.It is to be in the direction parallel with the axis of homology of the 1st polaroid 14 that polarized light is selected the axis of reflection of reflector plate 16, and polarized light is selected the axis of homology of reflector plate 16 and the axis of homology quadrature of the 1st polaroid 14.Adopt the known polarization light of making by stacked polymeric membrane to select reflector plate in the present embodiment.The polarized light of another linearly polarized light reflection is selected reflector plate so long as make a linearly polarized light transmission, all can.

Color filter 171a is the color filter that non-reflector plate setting area is used, and at the B side surface of the 1st glass substrate 11 3 primary colours RGB components is set respectively.Color filter 171b is the color filter that the reflector plate setting area is used, and disposes transparent color filter here.Therefore, reflector plate 161 is located at color filter 171b opposed zone.And, color filter 171b is set for big with respect to color filter 171a thickness, thereby as indicated above, set roughly the element thickness and the ratio of the element thickness of non-reflector plate setting area of reflector plate setting area for 1 to 2.Here, by the THICKNESS CONTROL element thickness of change color filter 171b, but also can be by at insulating resin layer 162 ladder being set, control module thickness.Photomask 18 is adjacent with color filter 171a, 171b, is located at and part wiring and the opposed zone of part that does not have pixel electrode, blocks the light from the A side toward the transmission of B side.

Transparency electrode 19 is located at color filter 171a, 171b and the B side surface of photomask 18 and the A side surface of the insulating resin layer 162 on the 2nd glass substrate 12 on the 1st glass substrate 11 respectively.As transparent electrode material, adopt ITO (alloy of forming by indium oxide and tin oxide).As transparent electrode material, adopt other metal film with electric conductivity, also identical.In the present embodiment, record and narrate to adopt the example of the transparent electrode material of forming by metal, also can but the resin beyond the metal, semiconductor etc. have transparent material.Also can suitably having connects up connects the contact site 19a of usefulness.

Liquid crystal display device 7 shown in Figure 16 is the display with double faces that can both watch demonstration from A side and B side, can both watch under all environment.When the A side of Figure 16 was watched, the bright place of light intensity did not make front lit light outside, can utilize outer light to select the reflected light of reflector plate 16 and reflector plate 161 to show at polarized light.The weak dark place of light is lighted front lit outside, and the light of reflection front lit shows on polarized light selection reflector plate 16.On the other hand, when the B side of Figure 16 is watched, front lit is lighted, can be utilized outer light to select the transmitted light of reflector plate 16 to show at polarized light at bright place.In the dark, front lit is lighted, the light of transmission front lit shows on polarized light selection reflector plate 16.

Then, describe the display packing that liquid crystal layer 13 is parallel-oriented when layer in detail with Figure 17 and Figure 18.

At first, the situation of watching from the A side with Figure 17 explanation.Explanation does not earlier apply voltage or applies enough low voltage condition.Make no polarized light pass through the 1st polaroid 14, thereby form linearly polarized light as outer light and front lit light.The 1st polaroid 14 transmissions of Figure 17 are the linearly polarized light of (parallel to paper) laterally.In the reflector plate setting area, this linearly polarized light passes through liquid crystal layer 13, thereby awards the roughly phase differential of pi/2, becomes circularly polarized light on reflector plate 161.And Fan She light becomes the opposite circular polarization light to the rotation of the direction of travel of light here, and the rework solution crystal layer 13 again, awards optical path difference, thereby the linearly polarized light of quadrature when becoming with incident when arriving the 1st polaroid 14 is absorbed by the 1st polaroid 14.Thus, become show state.On the other hand, the light by non-reflector plate setting district passes through on liquid crystal layer 13, obtains the roughly phase differential of π, thereby arrives the linearly polarized light of the polarized light quadrature when becoming with incident when polarized light is selected reflector plate 16.Therefore, select reflector plate 16 and the 2nd polaroid 15 through polarized light, light passes through to the liquid crystal board back side (B side), shows state thereby become to show slinkingly when being watched by the A side.

Make the element thickness of liquid crystal layer 13 different in the reflector plate setting area with non-reflector plate setting area like this, award different phase differential to the light that passes through, thereby realize white and black displays simultaneously in reflector plate setting area and non-reflector plate setting area, and both reflections are used for showing, realize that successfully bright reflection-type shows.Make transparently again by color filter 171b, achieving success aspect the reflected light brightness further improving the reflector plate setting area.

Then, when applying voltage on the liquid crystal layer 13, liquid crystal rises, and the polarization of incident light state is constant.Therefore, after the linearly polarized light by the 1st polaroid 14 is all kept this polarization state and reflected unchangeably in reflector plate setting area and non-reflector plate setting area,, thereby when watching, become bright show state by the A side again by the 1st polaroid 14.

Here, the evaluation result of liquid crystal display device 7 being used as the reflection characteristic of reflection type display device when the A side is watched is described.

At first, as with reference to measuring, the result of measurement of reflectivity in the structure of the reflector plate 161 that does not have Fig. 7 is shown.The composition that is used for measuring, liquid crystal board be the aperture opening ratio of transmissive portions equal 66% and the aperture opening ratio of reflector plate 161 equal 0%, polarized light reflector plate 16 is " D-BEF " (trade name) that Sumitomo 3M company makes.This is formed, and the result of measuring equipment (" CM-572 " of Minolta corporate system (measuring equipment the name)) measurement of reflectivity of the brightness of going into to hit with the energy measurement diffusion light is 2.2%.

The result of measurement of reflectivity in the liquid crystal display device 7 of Figure 17 then, is shown.The composition that is used for measuring, liquid crystal board be the aperture opening ratio of transmissive portions equal 66% and the aperture opening ratio of reflector plate 161 equal 13.5%, polarized light reflector plate 16 is " D-BEF " (trade name) that Sumitomo 3M company makes.Result with the measuring equipment measurement of reflectivity identical with reference measure is 3.9%.

From The above results as can be known, in the liquid crystal display device 7, reflectivity is about 2 times in the reference measure, can think that this is that following reason is brought.The polarized light that is contained in the 2nd glass substrate 12 outsides is selected the light of reflector plate 16 reflections because the parallax that the thickness of glass of liquid crystal board causes might pass through not homochromy color filter, and at this moment this wide part is absorbed, thus deepening.Otherwise the light of reflector plate 161 reflections must pass through homochromy color filter, thereby obtains the high reflection of efficient.

Then, the situation of watching from the B side with Figure 18 explanation.Here, in the reflector plate setting area with respect to the non-transmission part of liquid crystal board, the light that arrives reflector plate 161 shows not have contribution to transmission-type, thereby the work of omitting this part of explanation.At first, illustrate that liquid crystal layer 13 does not apply voltage or applies the state of enough low voltage.No polarized light as outer light and front lit light passes through the 1st polaroid 14, thereby becomes linearly polarized light.The 1st polaroid 14 of Figure 18 penetrates the linearly polarized light parallel and horizontal to paper.Transmissive light partly by non-reflector plate setting area passes through liquid crystal layer 13, thereby obtains the roughly phase differential of π, arrives the linearly polarized light of the polarized light quadrature when becoming with incident when polarized light is selected reflector plate 16.Therefore, this light is selected reflector plate 16 and the 2nd polaroid 15 by polarized light, is penetrated into the liquid crystal board back side (B side), thereby becomes bright show state when being watched by the B side.

Then, when applying voltage on the liquid crystal layer 13, liquid crystal rises, and the polarization of incident light state is constant.Therefore, after the linearly polarized light by the 1st polaroid 14 is all kept this polarization state and reflected unchangeably in reflector plate setting area and non-reflector plate setting area,, thereby when watching, become to show slinkingly and show state by the B side again by the 1st polaroid 14.

Light is from the incident of B side, and then the 2nd polaroid 15 makes this light become linearly polarized light, penetrates polarized light and selects reflector plate 16.At making alive not or add under the state of low-voltage, this linearly polarized light liquid crystal layer 13 turn round turn 90 degrees after, become the linearly polarized light parallel with the axis of homology of the 1st polaroid 14, penetrate the 1st polaroid 14.Applying under the state of voltage, this linearly polarized light in statu quo arrives the 1st polaroid 14, is absorbed by the 1st polaroid 14.

Like this, different with prior art, liquid crystal layer 13 is only selected reflector plate 16 at B side configuration polarized light, thus to liquid crystal layer 13 not from the reflected light of A side.At this moment, after the incident of B side, penetrate the light of the 2nd polaroid 15, because the absorption of the 2nd polaroid 15, do not comprise the linearly polarized light with the direction of the axis of homology quadrature of the 2nd polaroid 15, so be not subjected to polarized light to select to turn back to after reflector plate 16 reflections light of B side.

Therefore, the light of A side incident is used to show and showing slinkingly under the state that shows when the B side is watched, the light of B side incident is not reflected, thereby not only in the dark, and at Liang Chu, black demonstration is all good.As a result, liquid crystal display device 7 can all be deceived demonstration well at bright place and dark place.

According to liquid crystal display device 7, the 2nd glass substrate 12 is selected reflector plate 16 at B side configuration polarized light, thereby with select reflector plate 16 to compare at the inboard of the 1st glass substrate 11 and the 2nd glass substrate 12 configuration polarized light, reliability of products is improved, can also carry out simultaneously because of disposing convenient favourable manufacturing process.The non-transmission area of light is set between liquid crystal layer 13 and the 2nd glass substrate 12, select reflector plate 16 but dispose above-mentioned polarized light, has reflector plate 161 again, make from the A side toward the B side by the light reflection of liquid crystal layer 13, therefore, when the A side watches reflection-type to show, can reflect on the reflector plate 16 and blocked by non-transmission area and do not arrive the light that polarized light is selected reflector plate 16, can guarantee that demonstration becomes clear.When having color filter, select the light of reflection on the reflector plate 16 to be reduced with the reflection luminous energy compensating polarizing light of reflector plate 161 by the brightness that the absorbed different with the color filter of incident causes.

According to liquid crystal display device 7, under the bright show state when the A side is watched, the polarized state of light that liquid crystal layer 13 controls are passed through, make after the A side incident of the 1st polaroid 14 at the light of reflector plate 161 reflections and after the A side incident of the 1st polaroid 14, select the light of reflector plate 16 reflections to penetrate the 1st polaroid 14 once more, thereby help the light of reflector plate 161 reflections and bright simultaneously demonstration of light that polarized light is selected reflector plate 16 reflections at polarized light.Therefore, can guarantee the brightness that reflection-type shows.

Showing slinkingly under the state that shows when the A side is watched, the polarized state of light that liquid crystal layer 13 controls are passed through, make after the A side incident of the 1st polaroid 14 at the light of reflector plate 161 reflections and after the A side incident of the 1st polaroid 14, select the light of reflector plate 16 not penetrate the 1st polaroid 14 once more, thereby help the light of reflector plate 161 reflections and black simultaneously demonstration of light that polarized light is selected reflector plate 16 reflections toward polarized light.Therefore, can realize showing slinkingly and show and do not have problems state.

According to liquid crystal display device 7, the light that penetrates the 1st polaroid 14 from the A side becomes the axial linearly polarized light of transmission, but under bright show state, liquid crystal layer 13 makes this polarized state of light roughly constant, thereby the light that arrives polarized light selection reflector plate 16 is reflected, together photosynthetic with reflector plate 161 reflection penetrates the 1st polaroid 14 once more.

Show slinkingly and show under the state, liquid crystal layer 13 is controlled, making the polarized light phase differential is zero when penetrating the state of the 1st polaroid 14, and the end point of passing through of the light from the 1st polaroid 14 toward reflector plate 161 is pi/2 roughly, thereby light arrives reflecting member after becoming circularly polarized light.The light of reflector plate 161 reflections becomes opposite circular polarization light, thereby control by liquid crystal layer 13, make this phase differential that passes through on the end point of from reflector plate 161 light be π roughly toward the 1st polaroid 14, become the axial linearly polarized light of absorption with axis of homology direction quadrature, arrive the 1st polaroid 14, absorbed by the 1st polaroid 14.Liquid crystal layer 13 is controlled again, make above-mentioned phase differential be π roughly in the end point of passing through of the light of selecting reflector plate 16 from the 1st polaroid 14 toward polarized light, thereby light becomes and arrives polarized light behind the 2nd polarization state and select reflector plate 16, and penetrates polarized light and select reflector plate 16.

Thus, under the bright show state of reflection-type, can guarantee display brightness, simultaneously can also realize showing slinkingly and show and do not have problems state.

According to liquid crystal display device 7, liquid crystal layer 13 is in reflector plate setting area and non-reflector plate setting area, the ratio of element thickness is 1 to 2, thereby can keep making the liquid crystal layer 13 in two districts to be same type (ECB liquid crystal), only press the different polarization state that the comes and goes controls that realize considering light in two districts of element thickness.

According to liquid crystal display device 7, on the liquid crystal layer 13 not during making alive or when adding low-voltage etc. like that, showing under the conventional state, polarized light selects reflector plate 16 to make the wide part transmission that arrives from the A side, the 1st polaroid 14 absorbs the most of light that arrived by reflector plate 161 reflection backs, and the 2nd polaroid 15 makes the wide part transmission that arrives from the A side.Again, when applying sufficiently high voltage on the liquid crystal layer 13 etc. like that, under the maximum drive state that shows, the wide part transmission that polarized light selects reflector plate 16 to make the wide partial reflection that arrives from the A side, the 1st polaroid 14 that reflector plate 161 reflection backs are arrived.

Therefore, when the A side watches reflection-type to show, become normal deceiving, when the B side watches transmission-type to show, become Chang Bai.Black display quality under the conventional state of transmission-type depends on manufacturing process, but utilizes above-mentioned composition structure generally than reflection-type difference, becomes with driving condition and carries out black demonstration in the transmission-type.Like this, make the black demonstration of carrying out in the transmission-type good, do not rely on manufacturing process, thereby contrast is improved.

During reflection-type showed, demonstration was deceived simultaneously at conventional state in reflector plate setting area and non-reflector plate setting area, carries out white demonstration simultaneously at the maximum drive state.Therefore, even 1 pixel comprises two zones, also can make in two zones of pixel black show and white demonstration consistent, thereby can realize good demonstration.

Embodiment 7

Illustrate that according to Figure 19 to Figure 22 another embodiment of the present invention is as follows.

Figure 19 illustrates the outline vertical view of 1 pixel 103 of present embodiment, and Figure 20 illustrates the outline sectional view of display device part.1 pixel 103 of the present embodiment of the viewing area of formation display media is divided into the 1st district 101 and the 2nd district 102 at least.The 1st district 101 is formed on the regional interior transmitance region of 1 pixel 103, carries out transmission-type demonstration and reflection-type and show.The 2nd district 102 is formed on the regional interior non-transmission area of light of 1 pixel 103, only carries out reflection-type and show.

Pixel according to present embodiment is formed structure, does not utilize pixel to divide and forms reflection-type viewing area and transmission-type viewing area, thereby can improve the utilization ratio of light.

Then, with Figure 29 displaying principle is described.

Figure 20 is the figure that sees 1 pixel 103 from the side.At least in B side (the 2nd side) polarized light is set and selects reflection horizon (selecting reflection means, polarized light to select reflection means) 105 display media in the 1st district 101.Here, polarized light is set selects reflection horizon 105, it is crossed over to the B side of the display media in the 1st district 101 with to the B side of the display media in the 2nd district 102.Select reflection horizon 105 in the wiring 104 of A side signalization to polarized light.In the A side reflecting member (reflection means) 106 is set with wiring 104 at the 102 pairs of signals in the 2nd district.

Under the situation of present embodiment, polarized light is selected reflection horizon 105 to have and is made the linearly polarized light transmission parallel and horizontal to paper, and makes the vertical linearly polarized light function of reflecting of paper.Reflecting member 106 will be from the A side toward the B side by and the light of incident reflex to the A side, do not rely on polarization state.

The 1st district 101 is described.That is, as shown in figure 20, after the incident of B side, when polarized light selected reflection horizon 105 to become state (the 2nd state, the 2nd configuration status) to the parallel and horizontal linearly polarized light of paper, the light of incident was selected reflection horizon 105 by polarized light to light from the A side.At this moment, the transmission-type of seeing from the B side shows because incident light arrives the beholder, becomes bright show state; The reflection-type of seeing from the A side shows because incident light shows state less than reaching the beholder, become to show slinkingly.

On the other hand, after the incident of B side, when polarized light selected reflection horizon 105 to become state (the 1st state, the 1st configuration status) to the vertical linearly polarized light of paper, the light of incident was selected reflection horizon 105 reflections at polarized light to light from the A side.At this moment, the transmission-type of seeing from the B side shows because incident light shows state less than reaching the beholder, become to show slinkingly; The reflection-type of seeing from the A side shows because the incident light reflection arrives the beholder, becomes bright show state.

Then, the 2nd district 102 is described.The 2nd district 102 only helps to show from the reflection-type that the A side is seen, shows irrelevant with the transmission-type of seeing from the B side.Therefore, need the bright show state in setting the 2nd district 102 to show that with showing slinkingly state is as follows.

Set for: it is to show slinkingly when showing that the reflection-type of the A side in the 1st district 101 shows, the reflection-type of the A side in the 2nd district 102 shows to become simultaneously to show slinkingly and shows, and the reflection-type of the A side in the 1st district 101 shows that the reflection-type demonstration of the A side in the 2nd district 102 becomes bright demonstration simultaneously when being bright demonstrations.At this moment, the reflection-type of seeing from the A side shows becomes the demonstration that the demonstration with the demonstration in the 1st district 101 and the 2nd district 102 lumps together.In the present embodiment, show slinkingly and show that state is all consistent with the 2nd district 102 in the 1st district 101 with bright show state, thereby the demonstration that they are lumped together is good, does not cancel out each other.

Again by only forming the reflecting member 106 in the 2nd district 102, do not sacrifice the brightness that the transmission-type seen from the B side shows at the non-transmission area of the light of display media.Therefore, the transmission-type of seeing from the B side shows, can improve the utilization ratio of light to greatest extent, can become clear and visual high demonstration.

Like this, the display device of present embodiment can carry out transmission-type and show, the A side is incided the state of the parallel linearly polarized light of the paired paper of photocontrol in the 1st district 101, makes it penetrate polarized light selection reflection horizon 105, is used for the demonstration on the B side of display media.The display device of present embodiment can carry out the 1st reflection-type and show, the A side is incided the state of the vertical linearly polarized light of the paired paper of photocontrol in the 1st district 101, makes it be subjected to polarized light to select reflection horizon 105 to reflect, and is used for the demonstration on the A side of display media.The display device of present embodiment also can carry out the 2nd reflection-type and show, after making light that the A side incides the 2nd district 102 be subjected to reflecting member 106 to reflect, is used for the demonstration on the A side of display media.

Then, polarized light selects polarization state and the polarization state on the reflecting member 106 on the reflection horizon 105 big to the influence of contrast of display rate, thereby studies the polarization ellipse rate under each state and the relation of contrast ratio.

Figure 21 illustrates the polarization ellipse rate and relation from the contrast of display rate in the 2nd district 102 that the A side is seen on the reflecting member 106.As can be seen from Figure 21, the ellipticity on the reflecting member 106 in the 2nd district 102 can realize the contrast ratio more than or equal to 5 more than or equal to 0.7 o'clock, can well show.

Figure 22 illustrates polarized light and selects polarization ellipse rate and relation from the contrast of display rate in the 1st district 101 that the B side is seen on the reflection horizon 105.As can be seen from Figure 22, the ellipticity on the selection reflection horizon 105 in the 1st district 101 is less than or equal at 0.3 o'clock, can realize the contrast ratio more than or equal to 10, can well show.So long as the display media of control polarization, the relation of these ellipticities and contrast ratio can both obtain same result.At this moment, from the demonstration in the 1st district 101 that the A side is seen the demonstration of seeing from the B side is changed to show slinkingly and shows state and bright show state, if thereby show well from the transmission-type that the B side is seen, the reflection-type of seeing from the A side shows just good.From Figure 22 also as can be known, the ellipticity on the selection reflection horizon 105 in the 1st district 101 is less than or equal at 0.22 o'clock, can realize the contrast ratio more than or equal to 20, can better show.

As an example realizing that this polarization state is used, need to adjust the display media in the 1st district and the display media in the 2nd district.As its concrete means, the type that can make display media is different in the 1st district and the 2nd district, if but the thickness setting of the display media in the 1st district is become bigger than the thickness of the display media in the 2nd district in the 1st district so that mode such as insulation course to be set, even do not change the type of display media, also can make the polarization state coupling of two viewing areas easily.

Embodiment 8

Illustrate that according to Figure 23 to Figure 32 the another embodiment of the present invention is as follows.

Figure 23 illustrates the composition of the liquid crystal display device (display device) 200 of present embodiment with way of illustration.Liquid crystal display device 200 has ellipsoidal polarizing plate, the 2nd polaroid 207 and the 2nd optical compensatory element 209 of the 1st glass substrate the 201, the 2nd glass substrate 202, liquid crystal layer the 203, the 1st polaroid 204 and the 1st optical compensation element 205 compositions and ellipsoidal polarizing plate, light scattering layer 206, color filter 210a and 210b, photomask 211, transparency electrode 214, on-off element 215, light source 212, light guide sheet 213 and the reflector plate 218 that polarized light selects reflector plate 208 to form.Form the composition structure of clamping liquid crystal layer 203 between the 1st glass substrate (transparent substrates) 201 and the 2nd glass substrate (transparent substrates) 202, and as A side (the 1st side), the side from liquid crystal layer 203 toward the 2nd glass substrate 202 sides is as B side (the 2nd side) with the side from liquid crystal layer 203 toward the 1st glass substrate 201 sides in the both sides of clamping liquid crystal layer 203.Light source 212 and light guide sheet 213 constitute front lit.Front lit is located at the A side top of liquid crystal display device 200, and light guide sheet 203 with the light of 212 of light sources toward the irradiation of B side.Liquid crystal layer (display media, 90 degree twisted-nematic liquid crystal layers) 203 is 90 degree TN types.

The 1st polaroid (the 1st polarization means) 204 is located at the A side surface of the 1st glass substrate 201, and this polaroid has in accordance with regulations towards the axis of homology of setting, and only transmission becomes the light of the axial linearly polarized light component of transmission.By front lit to the 1st polaroid 204 incidents do not have light time of polarization, form the axial linearly polarized light of transmission and the transmission that are parallel to the 1st polaroid 204.As the 1st polaroid 204, also extended the material that makes the absorber orientation thereby adopt high molecula resin film to sneak into absorbers such as iodine, bitintability dyestuff.As polarizer material, even the material beyond above-mentioned, so long as make no polarized light formation linearly polarized light, any material all can.

The 2nd polaroid (the 2nd polarization means) 207 is located at the B side surface of the 2nd glass substrate 202, and the direction of its axis of homology and the 1st polaroid 204 be quadrature roughly.Polarized light is set between the 2nd glass substrate 202 and the 2nd polaroid 207 selects reflector plate (selecting reflection means, polarized light to select reflection means) 208.Polarized light selects reflector plate 208 in the polarization direction of the linearly polarized light that incides itself when parallel with axis of reflection, the light of this light as the 1st polarization state (the 1st state, the 1st directional ray polarization state) is reflected, and in the polarization direction when parallel, with of the light transmission in addition of this light as the 2nd polarization state (the 2nd state, the 2nd directional ray polarization state) with the axis of homology.Polarized light selects the axis of reflection and the axis of homology of reflector plate 208 mutually orthogonal.It is to be in the direction parallel with the axis of homology of the 1st polaroid 204 that polarized light is selected the axis of reflection of reflector plate 208, and the axis of homology of polarized light selection reflector plate 208 and the axis of homology of the 1st polaroid 204 be quadrature roughly.Adopt the known polarization light of making by stacked polymeric membrane to select reflector plate in the present embodiment.The polarized light of another linearly polarized light reflection is selected reflector plate so long as make a linearly polarized light transmission, all can.

The 1st optical compensatory element (optical compensation means) 205 is located between the 1st glass substrate 201 and the 1st polaroid 204.The 2nd optical compensatory element (optical compensation means) 209 is located between the 2nd glass substrate 202 and the polarized light selection reflector plate 208.In the A side of the 1st glass substrate 201 so that the order of the 1st polaroid 204 and the 1st optical compensatory element is provided with light scattering layer 206 for mode arbitrarily.

Color filter 110a is provided with 3 primary colours RGB respectively in the B side of the 1st glass substrate 201, and color filter 201b goes up the configuration clear filter.Reflector plate 218 does not rely on polarization state with the light reflection of incident.Reflector plate 208 is located on the insulating resin layer 216 that is provided with in the substrate and the roughly opposed zone of above-mentioned color filter 110b.Color filter 210b is with respect to RGB color filter 210a, and is big thickness setting, and the element thickness of color filter 210b part is set for other parts element thickness about 1/2.Here, by the THICKNESS CONTROL element thickness of change color filter 210b, but also can be by at insulating resin layer 216 ladder being set, control module thickness.Here, in order to improve the visuality of the reflector plate 218 that does not rely on polarization state, on insulating resin film 216, micro concavo-convex is set.Photomask 211 is adjacent with color filter 210a, 210b, is located at and part wiring and the opposed zone of part that does not have pixel electrode, blocks the light from the A side toward the transmission of B side.

Transparency electrode 214 is located at color filter 210a, 210b and the B side surface of photomask 211 and the A side surface on the 2nd glass substrate 202 on the 1st glass substrate 201 respectively.As transparent electrode material, adopt ITO (alloy of forming by indium oxide and tin oxide).As transparent electrode material, adopt other metal film with electric conductivity, also identical.In the present embodiment, record and narrate to adopt the example of the transparent electrode material of forming by metal, also can but the resin beyond the metal, semiconductor etc. have transparent material.Also can suitably having connects up connects the contact site 217 of usefulness.On-off element 215 is located at the A side surface of the 2nd glass substrate 202, and this element is for driving the active components such as TFT that each pixel is switched.

In the above-mentioned liquid crystal display device 200, color filter 210a and zone opposed with it are the 1st districts 220 that becomes transmitance region, are equivalent to the 1st district 101 of embodiment 7.Color filter 210b and district opposed with it are the 2nd districts 219, are equivalent to the 2nd district 102 of embodiment 7.Constitute the non-transmission area of light in the 2nd district 219 by the on-off element 215 that reflector plate 218 is located at the B side and wiring etc.

Optical design when specifying the such liquid crystal layer 203 of present embodiment and be 90 degree TN.The liquid crystal display device 200 of present embodiment satisfies simultaneously that the reflection-type of seeing from the A side shows and shows both display qualities from the transmission-type that the B side is seen.

The reflection-type of seeing from the A side show the 2nd district 219 that is equivalent to watch display device and the 1st district 220 both, the transmission-type demonstration of seeing from the B side is equivalent to only watch the 1st district 220.In other words, the 2nd district 219 only shows contribution to the reflection-type of watching from the A side, and the 220 pairs of reflection-types of watching from the A side in the 1st district show and show that from the transmission-type that the B side is watched contribution is all arranged.

At first, specify the optical design that the reflection-type in the 2nd district 219 is shown.

In the present embodiment, will show from the reflection-type that the A side is watched to be taken as normal deceiving, will show from the transmission-type that the B side is watched be taken as Chang Bai.In the 2nd district 219 as normal reflection-type demonstration of deceiving, in order to obtain high contrast ratio, preferably the linearly polarized light by the 1st polaroid 204 becomes circularly polarized light on reflector plate 218.Under this situation, when the light of reflection arrived the 1st polaroid 204 once more, the linearly polarized light of quadrature roughly when becoming with incident was subjected to the 1st polaroid 205 and blocks.

Yet, as shown in figure 24, having among the existing 90 degree TN of various optical path differences, linearly polarized light incides by its former state under the situation of liquid crystal layer 203, does not only form ellipticity during making alive on reflector plate 218 and is less than or equal to 0.54 polarization.Under this situation, the linearly polarized light of quadrature roughly when not becoming with incident when the light of reflection arrives the 1st polaroid 204 once more wherein in a large number by the 1st polaroid 204, can not get good shading state.Among Figure 24, even the most approaching circularly polarized condition, its ellipticity is 0.54, can not satisfy shown in the embodiment 7 obtain on the good reflector plate 106 that shows more than or equal to 0.7 ellipticity.

Therefore, in the present embodiment, after will being transformed into elliptically polarized light by the linearly polarized light of the 1st polaroid 204 in advance with the 1st optical compensatory element 205, make its liquid crystal layer 203 that incides 90 degree TN, on reflector plate 218, become ellipticity more than or equal to 0.7 polarized light thereby set for.Yet, will be transformed into the elliptically polarized light aspect in advance by the linearly polarized light of the 1st polaroid 204 and have restriction, its reason is as follows.

The transmission-type of Chang Bai shows original unwanted the 1st optical compensatory element 205 among the 90 degree TN that is provided with like that as indicated above in the 1st district 220, thereby for it is compensated, need with optical path difference equate with the 1st optical compensatory element 205 and optics on select on the reflector plate 208 the 2nd optical compensatory element 209 to be set at polarized light with the state of its quadrature.

At this moment, the 2nd optical compensatory element 209 also has the function that makes linearly polarized light become elliptically polarized light, this reduces transmission-type contrast of display rate, thereby as the 2nd optical compensatory element 209 that uses, with use can only linearly polarized light be transformed into as far as possible the little elliptically polarized light of ellipticity for good.Here, for the element that will make linearly polarized light be transformed into the elliptically polarized light of as far as possible little ellipticity also needs to use the element that can only linearly polarized light be transformed into the little elliptically polarized light of ellipticity as the 1st optical compensatory element 209, the 1 optical compensatory elements 205 as far as possible.Therefore, only need to select with 90 degree TN liquid crystal layers just on reflector plate 218 the formation ellipticity spend the TN liquid crystal layers near 90 of 1 polarized light as far as possible.

Figure 25 illustrates the ellipticity of the ellipsoidal polarizing plate of being made up of the 2nd polaroid the 207, the 2nd optical compensatory element 209 and polarized light selection reflector plate 208 and the relation of transmission-type contrast of display rate.As can be seen from Figure 25, the good transmission type shows more than or equal to 10 contrast ratio in order to realize forming, and needs 209 of the 2nd optical compensatory elements that linearly polarized light is transformed into ellipticity and is less than or equal to 0.3 polarized light.Therefore, also need to make the ellipticity of the ellipsoidal polarizing plate that the 1st polaroid 204 and the 1st optical compensatory element 205 form to be less than or equal to 0.3.

Figure 26 illustrates the ellipticity that makes right-hand circularly polarized light incide the different emergent light of 90 degree during TN of optical path difference.At this moment, be transformed into the ellipsoidal polarizing plate of the ellipticity polarized light identical, on reflector plate 218, form circularly polarized light with the emergent light ellipticity by use.As can be seen from Figure 26, optical path difference makes the ellipticity minimum near 250nm, and the 1st optical compensatory element 205 of use and the ellipticity of the 2nd optical compensatory element 209 diminish, and can keep transmission-type contrast of display rate.When using ellipticity to be less than or equal to the ellipsoidal polarizing plate that 0.3 above-mentioned the 1st optical compensatory element 205 forms, 90 optical path differences of spending TN in the 2nd district 219 that can be transformed into ellipticity and be 1 circularly polarized scope more than or equal to 150nm, be less than or equal to 320nm.And, when using ellipticity to be less than or equal to the ellipsoidal polarizing plate that 0.3 above-mentioned the 1st optical compensatory element 205 forms, can be transformed into optical path difference that ellipticity spends TN more than or equal to 90 of the 2nd district 219 of the scope of 0.7 polarization more than or equal to 150nm, be less than or equal to 340nm.

Above-mentioned liquid crystal display device 200 when the reflection-type of watching from the A side is shown as black the demonstration, applies OFF voltage, i.e. minimum voltage in the driving voltage on the liquid crystal layer 203 under the Δ ε of medium anisotropy of expression liquid crystal layer 203 is positive situation.At this moment, the light that incides the 1st district 220 from the A side selects reflector plate 208 to become to have to select with polarized light the elliptically polarized light or the linearly polarized light of the parallel major axis of the axis of homology of reflector plate 208 at polarized light.The light that incides the 2nd district 219 becomes elliptically polarized light or circularly polarized light on reflector plate 218.Therefore, use during the 1st district 220 and both reflection-types of the 2nd district 219 show, can make both black demonstrations unanimities accurately, deceive demonstration well.

Otherwise the Δ ε of liquid crystal layer 203 is under the negative situation, when the reflection-type of watching from the A side is shown as black the demonstration, applies ON voltage on the liquid crystal layer 203, i.e. ceiling voltage in the driving voltage.At this moment, the light that incides the 1st district 220 from the A side selects reflector plate 208 to become to have to select with polarized light the elliptically polarized light or the linearly polarized light of the parallel major axis of the axis of homology of reflector plate 208 at polarized light.The light that incides the 2nd district 219 becomes elliptically polarized light or circularly polarized light on reflector plate 218.Therefore, use during the 1st district 220 and both reflection-types of the 2nd district 219 show, can make both black demonstrations unanimities accurately, deceive demonstration well.

On the other hand, the 1st district 220 is 90 degree TN of Chang Bai, owing to apply enough voltage, irrelevant with the value of the optical path difference of liquid crystal layer 203, and the 1st optical compensatory element 205 and the 2nd optical compensatory element 209 have optical path difference about equally and the relation of the axle quadrature that lags behind, thereby can carry out good black demonstration.Yet as shown in figure 27, the transmissivity during making alive does not depend on the optical path difference of liquid crystal layer 203, and the transmissivity height is under the situation of 400nm.

Utilize above-mentioned optical design, make liquid crystal display device 200.Specifically, the element thickness that liquid crystal layer 203 is made into the 2nd district 219 is 2.8 μ m, and the element thickness in the 1st district 220 is 5.6 μ m.Orientation process on the 1st glass substrate 201 and the 2nd glass substrate 202 is parallel-oriented, fills the liquid-crystal composition of 100 left-handed μ m of Δ n=0.089 and spontaneous spacing with methods such as vacuum impregnations.

The liquid crystal layer 203 in the 2nd district 219 is that optical path difference is the 90 degree TN of 250nm, the ellipticity of the emergent light to it during from reflector plate 218 incident circularly polarized lights is 0.18, and it be-70 to spend during as forward as 0 degree, counter-clockwise sense of rotation that long axis of ellipse is ground direction with the downside substrate.In the setting of each optical element, with optical path difference is the major axis of the hysteresis axle of the 1st optical compensatory element 205 of the 138nm elliptically polarized light of outgoing when setting the reflector plate 218 incident circularly polarized lights that are parallel to from the 2nd district 219 for, and sets the angle of the hysteresis axle of the absorption axes of the 1st polaroid 204 or the axis of homology and the 1st optical compensatory element 205 for-10 degree.On the other hand, the 2nd optical compensatory element 209, its optical path difference is 138nm, its hysteresis axle has the roughly relation of quadrature with the hysteresis axle of the 1st optical compensatory element 205.Polarized light selects the axis of reflection of reflector plate 208 and the absorption axes of the 2nd polaroid 207 to have the relation of almost parallel, and the absorption axes of the absorption axes of the 2nd polaroid 207 and the 1st polaroid has the roughly relation of quadrature.

The photoelectric characteristic that Figure 28 and Figure 29 illustrate that the reflection-type of seeing from the A side of the liquid crystal display device 200 that utilizes the present embodiment that said method makes shows and show from the transmission-type that the B side is seen.Among Figure 28, Figure 29, solid line illustrates the characteristic of the liquid crystal display device 200 of present embodiment, and dotted line illustrates the characteristic of existing display device without optical compensatory element as a comparative example.Figure 31 illustrates the set angle of each optic axis in the present embodiment.

In the present embodiment, for linearly polarized light is transformed into elliptically polarized light, λ/4 slice that with optical path difference are 138nm are as the 1st optical compensatory element 205, but be not limited thereto, also available by changing the method that optical path difference itself is transformed into elliptically polarized light, set by the axle of suitably optimizing each optic axis under this situation, can obtain the effect identical with present embodiment.

Then the situation of explanation is: in the liquid crystal display device 200, the lamination-type element that the multi-disc optical element is formed is used as the 1st optical compensatory element 205, so that use the circularly polarized light of formation in a big way of visible region on reflector plate 218.

As an example, the set angle of each optic axis when Figure 32 illustrates the 2nd optical compensatory element 209 that uses the 1st optical compensatory element 205 be made up of as the optical compensatory element 205b of 275nm as the optical compensatory element 205a of 138nm and optical path difference optical path difference and be made up of as the optical compensatory element 209b of 275nm as the optical compensatory element 209a of 138nm and optical path difference optical path difference.Under this situation, the contrast ratio of reflection-type further improves, and Figure 30 illustrates its photoelectric characteristic.Among Figure 30, solid line illustrates the characteristic of the liquid crystal display device 200 that the composition of Figure 32 brings, and dotted line illustrates the characteristic of existing display device without optical compensatory element as a comparative example.

Embodiment 9

Illustrate that according to Figure 23, Figure 33 to Figure 41 another embodiment of the present invention is as follows.

The display device of present embodiment is taken as even orientation to the liquid crystal display device 200 of Figure 23 with liquid crystal layer 203, for example is ECB (Electrical controlled birefringence: the liquid crystal of type electrically conerolled birefringence).203 pairs of this liquid crystal layers incide a polarized light that this passes through after one's death awards phase differential.Here, liquid crystal layer 203 set for do not apply voltage or apply under the enough low voltage, award the phase differential of λ/2 in the 1st district 220, and award the phase differential of λ/4 in the 2nd district 219.

The general optical design of this liquid crystal display device 200 then, is described.Liquid crystal display device 200 satisfies simultaneously that the reflection-type of seeing from the A side shows and shows both display qualities from the transmission-type that the B side is seen.The reflection-type of seeing from the A side show the 2nd district 219 that is equivalent to watch liquid crystal display device 200 and the 1st district 220 both, the transmission-type demonstration of seeing from the B side is equivalent to only watch the 1st district 220.In other words, the 2nd district only shows contribution to the reflection-type of seeing from the A side, and the 220 pairs of reflection-types of seeing from the A side in the 1st district show and show that from the transmission-type that the B side is seen contribution is all arranged.

At first, the reflection-type demonstration in the 2nd district 219 is studied.

In the making of liquid crystal display device 220, it is that element thickness in 2.5 μ m, the 1st district 220 is 5.0 μ m that liquid crystal layer 203 is made element thickness in the 2nd district 219.Orientation process on the 1st glass substrate 201 and the 2nd glass substrate 202 is taken as parallel-oriented, and fills the liquid-crystal composition of Δ n=0.065 with vacuum impregnation.

Use the reflection-type in liquid crystal display device 200 researchs the 2nd district 219 of making as stated above to show.The optical path difference R1 of the 1st optical compensatory element (optical compensation means, the 1st optical compensation means) 205 is changed, to the situation and parallel situation measurement of reflectivity and contrast ratio of hysteresis axle with the liquid crystal molecule axis of guide quadrature of liquid crystal layer 203 of the 1st optical compensatory element 205.Figure 33 illustrates its result.The optical path difference of liquid crystal layer 203 is as the optical path difference that applies the not making alive state of minimum voltage in the driving voltage (OFF voltage) state.The optical path difference of the liquid crystal layer 203 in the 2nd district 219 is taken as Rr.The zone of Rr-R1 is the situation of the liquid crystal molecule axis of guide quadrature of the hysteresis axle of the 1st optical compensatory element 205 and liquid crystal layer 103, to the pairing phase differential of optical path difference of awarding by light than the optical path difference R1 share of little the 1st optical compensatory element 205 of optical path difference Rr of liquid crystal layer 203.The zone of Rr+R1 is the hysteresis axle of the 1st optical compensatory element 205 situation parallel with the liquid crystal molecule axis of guide of liquid crystal layer 103, to the phase differential of awarding by light between the pairing quadrature component of optical path difference that optical path difference R1 share that the optical path difference Rr of liquid crystal layer 203 adds the 1st optical compensatory element 205 obtains.

Here, if reflectivity more than or equal to 8%, contrast ratio is more than or equal to 5, just can carry out good demonstration.What all satisfy above-mentioned value with the reflectivity shown in the fine line with the contrast ratio shown in the heavy line among Figure 33 is the zone that limits.The situation of its qualification is: in the hysteresis axle that satisfies the 1st optical compensatory element 205 and the zone that the liquid crystal molecule axis of guide has orthogonality relation Rr-R1 more than or equal to-175nm, be less than or equal to-the hysteresis axle of regional or the 1st optical compensatory element 205 of 105nm and the zone that the liquid crystal molecule axis of guide has orthogonality relation in Rr+R1 more than or equal to 100nm, be less than or equal to the zone of 170nm.At this moment, the polarized light ellipticity on the reflector plate 218 that forms in the 2nd district 219 is more than or equal to 0.7.

Be the Rr-R1=-137nm in two best zones and the situation of Rr+R1=133nm to being in Rr-R1 shown in Figure 33 or Rr+R1, the not transmissivity and the contrast ratio of making alive state of liquid crystal layer 203 transmission-type that Figure 34 to Figure 37 illustrates the optical path difference R2 that makes the 2nd optical compensatory element (optical compensation means, the 2nd optical compensation means) 209 respectively to be seen from the B side when changing shows.Parallel and the quadrature of putting down in writing on the curve of Figure 34 to Figure 37 means the relation of the liquid crystal molecule axis of guide of the hysteresis axle of the 2nd optical compensatory element 209 and liquid crystal layer 203.Among these figure, the optical path difference Rt of the liquid crystal layer 203 in the 1st district 220 is with the thickness difference of the optical path difference Rr in the 2nd district 219, liquid crystal layer 203 and difference.

Curve when Figure 34 is Rr-R1=-137nm illustrates in the 1st polaroid 204 and the 2nd polaroid 207, and the axis of homology or absorption axes have the situation of orthogonality relation.Curve when Figure 35 is Rr-R1=-137nm illustrates in the 1st polaroid 204 and the 2nd polaroid 207, and the axis of homology or absorption axes have the situation of parallel relation.Figure 34 and Figure 35 to the situation and parallel situation of hysteresis axle with the liquid crystal molecule axis of guide quadrature of the 2nd optical compensatory element 209, illustrate the result who measures transmissivity and contrast ratio respectively.The hysteresis axle of region representation the 2nd optical compensatory element 209 of Rt-R1-R2 and the situation of liquid crystal molecule axis of guide quadrature, the hysteresis axle situation parallel of region representation the 2nd optical compensatory element 209 of Rt-R1+R2 with the liquid crystal molecule axis of guide.Here, if transmissivity more than or equal to 8%, contrast ratio is more than or equal to 10, just can carry out good demonstration.

What all satisfy above-mentioned value with the contrast ratio shown in reflectivity shown in the fine line and the heavy line among Figure 34 is the zone that limits, be present in the hysteresis axle of the 2nd optical compensatory element 209 and the zone that the liquid crystal molecule axis of guide has parallel relation, and Rt-R1+R2 more than or equal to 190nm, be less than or equal to 300nm.

What all satisfy above-mentioned value with the contrast ratio shown in reflectivity shown in the fine line and the heavy line among Figure 35 is the zone that limits, the hysteresis axle and the liquid crystal molecule axis of guide at the 2nd optical compensatory element 209 have in the district of parallel relation, are Rt-R1+R2 more than or equal to 25nm, are less than or equal to the zone of 50nm.The hysteresis axle and the liquid crystal molecule axis of guide at the 2nd optical compensatory element 209 have in the district of vertical relation, are Rt-R1-R2 more than or equal to-50nm, are less than or equal to the zone of 25nm.

Figure 36 is the result to Rr+R1=133nm, illustrates in the 1st polaroid 204 and the 2nd polaroid 207, and the axis of homology or absorption axes have the situation of orthogonality relation.Figure 37 is the result to Rr+R1=133nm, illustrates in the 1st polaroid 204 and the 2nd polaroid 207, and the axis of homology or absorption axes have the situation of orthogonality relation.To the situation and parallel situation of hysteresis axle with the liquid crystal molecule axis of guide quadrature of the 2nd optical compensatory element 209, measure transmissivity and contrast ratio.The hysteresis axle of region representation the 2nd optical compensatory element 209 of Rt-R1-R2 and the situation of liquid crystal molecule axis of guide quadrature, the hysteresis axle situation parallel of region representation the 2nd optical compensatory element 209 of Rt-R1+R2 with the liquid crystal molecule axis of guide.Here, if transmissivity more than or equal to 8%, contrast ratio is more than or equal to 10, just can carry out good demonstration.

What all satisfy above-mentioned value with the contrast ratio shown in reflectivity shown in the fine line and the heavy line among Figure 36 is the zone that limits, be present in the hysteresis axle of the 2nd optical compensatory element 209 and the zone that the liquid crystal molecule axis of guide has orthogonality relation, and Rt-R1+R2 more than or equal to 190nm, be less than or equal to 300nm.

What all satisfy above-mentioned value with the contrast ratio shown in reflectivity shown in the fine line and the heavy line among Figure 37 is the zone that limits, be present in the hysteresis axle of the 2nd optical compensatory element 209 and the zone that the liquid crystal molecule axis of guide has orthogonality relation, and Rt-R1+R2 more than or equal to-50nm, be less than or equal to the zone of 50nm.

Figure 34 to Figure 37 illustrates the transmission-type characteristics showed of seeing from the B side from the 1st district 220, and the reflection-type characteristics showed of seeing from the A side also is shown simultaneously.The reflection-type of seeing from the A side shows it is the bright secretly flip displays of (black and white) that shows from the transmission-type that the B side is seen.That is, good from the transmission-type characteristics showed that the A side in the 1st district 220 is seen, just simultaneously also good from the reflection-type characteristics showed that the B side in the 1st district 220 is seen.

In the present embodiment, the optical path difference Rr that the 2nd district 219 of liquid crystal layer 203 has been described is that the optical path difference Rt in 162.5nm, the 2nd district 220 is the situation of 325nm, but optical path difference Rr, Rt are not limited thereto.

The concrete optical design value of above-mentioned liquid crystal display device 200 then, is described.With mentioned above identical, in the making of liquid crystal display device 200, the element thickness that liquid crystal layer 203 is made into the 2nd district 219 is 2.5 μ m, and the element thickness in the 1st district 220 is 5.0 μ m.Orientation process on the 1st glass substrate 201 and the 2nd glass substrate 202 is parallel-oriented, fills the liquid-crystal composition of Δ n=0.065 with methods such as vacuum impregnations.In the 1st optical compensatory element 205, materials used is that PVA (polyvinylcarbazole) and its optical path difference R1 are the polymeric membrane of 300nm.In addition, the 1st optical compensatory element 205 is set, the angle that makes the hysteresis axle of the liquid crystal molecule axis of guide and the 1st optical compensatory element 205 is 90 degree.

In the 2nd optical compensatory element 209, materials used is that PVA (polyvinylcarbazole) and its optical path difference R2 are the polymeric membrane of 220n m.The 2nd optical compensatory element 209 is set, and the angle that makes the hysteresis axle of the liquid crystal molecule axis of guide and the 2nd optical compensatory element 209 is 0 degree.As shown in figure 38, being arranged to the axis of homology of the 1st polaroid 204 and the angle of the 1st optical compensatory element 205 is 45 degree, make polarized light select the axis of homology of reflector plate 208 consistent, and be arranged to the axis of homology formation orthogonality relation of these axis of homology and the 1st polaroid 204 with the axis of homology of the 2nd polaroid 207.

The angle that also can be arranged to the hysteresis axle of the absorption axes of the 1st polaroid 204 and the 1st optical compensatory element 205 is 45 degree, make polarized light select the axis of reflection of reflector plate 208 consistent, and be arranged to the absorption axes formation orthogonality relation of these absorption axes and the 1st polaroid 204 with the absorption axes of the 2nd polaroid 207.

Display characteristic measurement result with the liquid crystal display device 200 of above optical design value is shown below.

At Figure 39 and Figure 40 photoelectric characteristic that the reflection-type seen from the A side shows and the photoelectric characteristic that shows from the transmission-type that the B side is seen are shown respectively.Figure 39 illustrates the voltage that liquid crystal layer 203 applies and the relation of reflectivity, and Figure 40 illustrates the voltage that liquid crystal layer 203 applies and the relation of transmissivity.Distinguish that reflection-type shown in Figure 39 shows, transmission-type demonstration shown in Figure 40 all realizes enough brightness and contrast ratio.The reflection-type of seeing from the A side shows it is common-black type, the transmission-type of seeing from the B side shows it is normally white, but do not watch from A side and B side simultaneously on liquid crystal display device 200 its structures of present embodiment, thereby can utilize the black and white tumbler switch respectively the A side to be shown and the in good time black and white of selecting of B side demonstration.Also can have about image the switch that upset, image spin upside down etc. concurrently.

Otherwise the Δ ε of liquid crystal layer 203 is under the negative situation, when the reflection-type of watching from the A side is shown as black the demonstration, applies ON voltage on the liquid crystal layer 203, i.e. ceiling voltage in the driving voltage.At this moment, the light that incides the 1st district 220 from the A side selects reflector plate 208 to become to have to select with polarized light the elliptically polarized light or the linearly polarized light of the parallel major axis of the axis of homology of reflector plate 208 at polarized light.The light that incides the 2nd district 219 becomes elliptically polarized light or circularly polarized light on reflector plate 218.Therefore, use during the 1st district 220 and both reflection-types of the 2nd district 219 show, can make both black demonstrations unanimities accurately, deceive demonstration well.Applying on the liquid crystal layer 203 under the state of ON voltage, obtaining the relation of above-mentioned each optical path difference Rr, Rt, R1, R2.

But it is identical with embodiment 8 that the control of above-mentioned each elliptically polarized light ellipticity is not limited to.

The function of the light scattering layer 206 that liquid crystal display device 200 has then, is described.

The liquid crystal display device 200 of present embodiment is under the situation that the transmission-type of seeing from the B side shows, in demonstration, can not only be used to light from front lit, and can utilize cross over front lit incident from around light, thereby different with existing transmissive display spare, can realize also that under bright environment high-quality transmission-type shows.Yet, after the light that peripheral reflection comes incides the 1st district 200 of liquid crystal display device 200, when not scattering ground passes through, the deep or light (pattern of indoor floor, desk for example of ambient light; The pattern of outdoor ground) in statu quo is superimposed upon in the demonstration.That is, produce phenomenon identical when passing through clear glass and see desk, floor, ground, display quality is greatly reduced.Avoid this phenomenon by making liquid crystal display device 200 have the function of light being carried out scattering, can reaching.Therefore, at liquid crystal display device 200 light scattering layer 206 is set.On the other hand, again to light scattering layer 206 suitable selective scattering intensity, make this light scattering layer 206 not cause contrast ratio to reduce.

When the degree of distributing always of liquid crystal display device 200 is too big, see that from the A side reflection-type shows, sees that from the B side transmission-type contrast of display rate all reduces, front face brightness is descended.And, see that from the A side reflection-type shows, image blurring remarkable.According to above viewpoint, best degree of distributing in the liquid crystal display device 200 of research present embodiment.Degree of distributing is 50, and the pattern overlapping that the light around making causes is roughly eliminated.Even also distinguish the pattern that contrast is high,, also be eliminated by degree of distributing is taken as 60.Among Figure 41,, the reflection-type contrast of display rate seen from the A side is shown and the measurement result of the transmission-type contrast of display rate seen from the B side to the situation of the different light scattering layer of various degree of distributing is set on the display device identical with Figure 23.

Display device is when always degree of distributing is little, though the contrast ratio height produces the problem on using for above-mentioned reasons.Degree of distributing greater than 90 situation under, contrast significantly reduces, and has the problem in the practicality.The reflection-type contrast of display rate that makes like that mentioned above is more than or equal to 5, and transmission-type contrast of display rate is more than or equal to 10, then can carry out practically no problem demonstration, thereby when preferably making degree of distributing maximum for being less than or equal to 95.

By these research, distinguish display device always degree of distributing more than or equal to 50, be less than or equal to 95, preferably more than or equal to 60, be less than or equal at 90 o'clock, can solve pattern overlapping and the contrast ratio that above-mentioned surround lighting causes and reduce.

Therefore, light scattering layer 206 can be set, the degree of distributing always that makes liquid crystal display device 200 more than or equal to 50, be less than or equal to 95, perhaps more than or equal to 60, be less than or equal to 90.Have the light scattering function by the arbitrary member (for example color filter 210a, the 1st glass substrate the 201, the 2nd glass substrate 202, insulating resin layer 216 etc.) that makes liquid crystal display device 200, can omit light scattering layer 206.

The relation that position and display characteristic are set of light scattering layer 206 then, is described.

At first, when table 1 illustrates liquid crystal layer 203 position is set is taken as the A side of light scattering layer 206 and when being taken as the B side, measure the result of the contrast ratio of display device 200 respectively.

Table 1

	The reflection-type of seeing from the A side shows	The transmission-type of seeing from the B side shows
	The reflection-type of seeing from the A side shows	The transmission-type of seeing from the B side shows	Be arranged on the A side	??17	??120
Be arranged on the B side	??30	??20	Be arranged on the A side	??17	??120
Be arranged on the B side	??30	??20	Do not establish light scattering layer	??30	??150

At this moment, as the degree of distributing of light scattering layer 206, adopt 80.Liquid crystal layer 203 when the A side is provided with light scattering layer 206, though it is low to become the reflection-type contrast of display rate of the demonstration of seeing from the A side, is become the transmission-type contrast of display rate height of the demonstration of seeing from the B side.In this case, transmission-type contrast of display rate reduces than the reduction of reflection-type contrast of display rate significantly.On the other hand, liquid crystal layer 203 when the B side is provided with light scattering layer 206, is become the reflection-type contrast of display rate height of the demonstration of seeing from the A side, the transmission-type contrast of display rate that becomes the demonstration of seeing from the B side greatly reduces.Distinguish: it preferentially is very wise move that transmission-type is shown, the scheme that liquid crystal layer 203 is arranged on the A side improves the function as liquid crystal display device 200.

The transmission-type demonstration of seeing from the B side can utilize light on every side, but at this moment Zhou Wei light is according to environment, often the polarized light component that vibrates in the horizontal direction of electric field is many, the horizontal direction of the device posture of the axis of homology by making the 1st polaroid 204 when using liquid crystal display device 200 is roughly consistent, can improve the utilization ratio of light.

Embodiment 10

Illustrate that according to Figure 42 to Figure 52 the another embodiment of the present invention is as follows.To having the component units mark same-sign of the component units identical functions of saying with above-mentioned embodiment 1, omit its explanation.

Figure 42 illustrates the cross section of the liquid crystal display device (display device) 300 of present embodiment and forms.Display device 300 has the 1st glass substrate the 11, the 2nd glass substrate 12, liquid crystal layer the 13, the 1st polaroid the 14, the 2nd polaroid 15, polarized light selection reflector plate 16, color filter 17, photomask 18, transparency electrode 19, on-off element 20, light absorbing zone 21, light source 22, light guide sheet 23 and optical modulator body 310.That is, its liquid crystal display device 1 of forming setting forth in the embodiment 1 adds optical modulator body 310.

Form the structure of clamping liquid crystal layer 13 between the 1st glass substrate 11 and the 2nd glass substrate 12, side from liquid crystal layer 13 toward the 1st glass substrate 11 sides in the both sides of clamping liquid crystal layer 13 is used as A side (the 1st side), and the side from liquid crystal layer 13 toward the 2nd glass substrate 12 sides is used as B side (the 2nd side).This liquid crystal display device 300 is the display with double faces that can both watch demonstration from A side and B side.

The display with double faces that has two display screens like this can be watched demonstration from the two sides of display device under all environment.Yet, one side during for bright show state another side show state for showing slinkingly, another side was bright show state when one side was shown state for showing slinkingly, to the total image that shows that bright secretly (black and white) overturns of same video data.When the light of this flipped image is remained unchanged, can read flipped image to display device in a side opposite with the beholder.During from the very strong surround lighting of the transmission side of demonstration incident, can be from the show state identical that overturns about the reflection side of demonstrationing watch with transmission demonstration side.

Like this, in the existing display device with two display screens, owing to can see the demonstration of using screen from the back side, existing problems aspect privacy.By being equipped with optical modulator body 310, there not being the visuality of not supplying with the back displays that the user watches in the present embodiment head it off to double-sided display escope spare, thereby the display device of taking the protection privacy into account is provided.

310 pairs of light guide sheet 23 of optical modulator body (optical modulation means) are located at the A side.At the light of the regulation of A side incident outgoing, can switch travel condition in accordance with regulations like that in 310 pairs of liquid crystal display devices 300 of optical modulator body.

To the emergent light in the incident emergent light of liquid crystal display device 300 when not having optical modulator body 31, be used for demonstration on the A side or the demonstration on the B side, formation can be supplied with beholder's state (comprising flipped image), and advances toward the outside of liquid crystal display device 300.As the light of the A side that shines liquid crystal display device 300, exist the light of liquid crystal display device 300 from the 1st polaroid 14 toward the outside outgoing of A side.

Incident light in the incident emergent light of liquid crystal display device 300 when not having optical modulator body 31, in order to be used for demonstration on the A side or the demonstration on the B side, is advanced toward the inside of liquid crystal display device 300 before taking out the regulation polarized light.As the light that incides liquid crystal display device 300 from the A side, exist the light of liquid crystal display device 300 from past the 1st polaroid 14 incidents in outside of A side.Thereafter, for the direct of travel of switches light, optical modulator body 310 switches between modulation condition and non-modulation state.Optical modulator body 310 can be provided at least one side of A side and B side, the following describes the situation that it is located at the A side.

When the A side was watched liquid crystal display device 300, making 310 pairs of optical modulator bodies supply with the polarized light (promptly shining the light of A side from the 1st polaroid 14) that the A side shows was non-modulation state.Optical modulator body 310 forms the travel condition that is transmissive state to light that advances from the 1st polaroid 14 toward the A skidding and the light of advancing from the A side toward the 1st polaroid 14 under non-modulation state.At this moment, can utilize front lit or outer light to select the reflected light of reflector plate 16 to carry out the demonstration of watching from the A side at polarized light.

On the other hand, when the B side is watched liquid crystal display device 300, make 310 pairs of optical modulator bodies supply with the light polarization light (promptly shining the light of A side) that the A side shows and be modulation condition from the 1st polaroid 14.Optical modulator body 310 is under modulation condition, and the direct of travel that will become common transmissive state to the light that advances from the 1st polaroid 14 toward the A skiddings is modulated into the travel condition that forms different conditions, makes the A side can not recognition image.And to the light of advancing toward the 1st polaroid 14 from the A side, the travel condition that can keep becoming transmissive state is constant, also can be modulated to the travel condition that becomes different conditions from the travel condition that becomes transmissive state.At this moment, can utilize outer light or front lit to select the transmitted light of reflector plate 16 to carry out the demonstration of watching from the B side at polarized light.Yet, by optical modulator body 310 is taken as modulation condition, can not discern the flipped image that the B side shows from the A side, institute is so that the visuality reduction that shows can be protected privacy.

The concrete composition of optical modulator body 310 then, is described.

Optical modulator body 310 shown in Figure 43 is made of the 3rd glass substrate the 301, the 4th glass substrate 302, light scattering layer 303, a pair of transparency electrode 304 and 305.From the A side toward the B side, dispose the 3rd glass substrate 301, transparency electrode 304, light scattering layer 303, transparency electrode 304, light scattering layer 303, transparency electrode the 304, the 4th glass substrate 302 successively.

Light scattering layer 303 uses the macromolecule diffused liquid crystal (Polymer DispersedLiquid Crystal:PDLC) of UV cured formula, forms transparency electrode 104 at whole screen.Pre-polymerization liquid crystal compound as the macromolecule diffused liquid crystal of UV cured formula, for example (DIC company makes to mix UV cured material with 10: 90 weight ratio, commodity are called Mix C) and medium anisotropy be that (メ Le Network company makes for the liquid crystal of minus, commodity are called ZLI-4318) potpourri add a small amount of polymerization catalyst agent (manufacturing of チバガィギ company), thereby obtain.By this prepolymer is carried out polymerization, obtain this macromolecule diffused liquid crystal.On the transparency electrode 304 of two substrate surfaces of enclosing liquid crystal, apply the vertical alignment layer of liquid crystal to alignment films approximate vertical orientation.

Incide the light of above such macromolecule diffused liquid crystal layer of making, according to the voltage that applies, its travel condition switches to scattering state and transmissive state.Here, liquid crystal layer becomes pellucidity to light when setting not making alive for, and liquid crystal layer becomes modulation condition when applying voltage.

In the above-mentioned example, medium anisotropy is used as the liquid crystal that liquid crystal layer is used for negative material, vertical alignment layer is used as alignment films, but liquid crystal and alignment films are not limited thereto, the usable medium anisotropy is the positive liquid crystal material and the liquid crystal material of horizontal alignment respectively, also can be hybrid orientation, curved orientation etc. by combination.

Among Figure 43, when the B side is watched, as the no polarized light of outer light and front lit light by the 1st polaroid 14, thereby become linearly polarized light.Laterally the linearly polarized light of (parallel to paper) penetrates the 1st polaroid 14.This linearly polarized light is by liquid crystal layer 13, thereby light rotates, and turns round to turn 90 degrees, and becomes vertically (vertical to paper) linearly polarized light.When the axis of homology of setting the 1st polaroid 14 for and polarized light selected the axis of homology of reflector plate 16 parallel, linearly polarized light was turned round at liquid crystal layer 13 and is turn 90 degrees, and selected the axis of homology incident orthogonally of reflector plate 16 with polarized light.Thus, make linearly polarized light be parallel to the axis of reflection ground incident that polarized light is selected reflector plate 16.The linearly polarized light that is parallel to axis of reflection incident is reflected, and turns round at liquid crystal layer 13 once more to turn 90 degrees, and reverts to original linearly polarized light, penetrates the 1st polaroid 14.

Like this, make light not be transmitted to the B side, show state, but simultaneously when the A side is watched, show the bright state of this transmitted light thereby realize showing slinkingly.The B side is under the bright show state, and light on every side penetrates the 1st polaroid 14 as the x wire polarized light during from the incident of B side, and transmitted light is remained unchanged, and then viewed in the A of liquid crystal display device 300 side is bright demonstration.

Here, when light scattering layer 303 was applied voltage, light scattering layer 303 became modulation condition (right side of Figure 43), made the bright display light direct scattering of the A side that is penetrated into liquid crystal display device 300, thereby can make image blurring.Simultaneously, the surround lighting that incides the no polarization state of optical modulator body 310 from the A side is subjected to direct scattering at light scattering layer 303.The surround lighting of the no polarization state of scattering becomes the polarized light component that is parallel to paper at the 1st polaroid 14, can be used for the demonstration on the B side.The exploring degree, light scattering layer 303 that the image visual reduction effect that scattering causes depends on display image the value of the degree of distributing of scattering state and liquid crystal display device 300 and light scattering layer 303 apart from d.Therefore, the degree of distributing of best scattering state is more than or equal to 50.

The utilization ratio that the surround lighting that interpolation optical modulator body 310 brings shows the B side depends on the all-optical transmittance under light scattering layer 303 scattering states, thereby best all-optical transmittance is more than or equal to 50%.

On the other hand, during making alive, light scattering layer 303 is not non-modulation state (left side of Figure 43), stops the incident light from the B side, uses front lit light or environment reflection of light to show thereby can be watched by the A side.

The A side is used as under the user mode of waiting for the reception screen, and aspect the inhibition power consumption, light scattering layer 303 is good with " the reversal PDLC " shown in the present embodiment, but is not limited thereto.

But design organization also makes itself and voltage that the use of switching A side display screen and B side display screen changes in linkage to transparency electrode 304 apply state, and switches the modulation condition of optical modulator body 310.

Also optical modulator body 310 can be configured between the light guide sheet 23 and the 1st polaroid 14 of front lit.At this moment, 310 pairs of light guide sheet 23 of optical modulator body are positioned at liquid crystal layer 13 sides.Light guide sheet 23 is rayed means that irradiation shows the light of usefulness, and the light of light source 22 outgoing is shone as the light that incides liquid crystal display device 300.Optical modulator body 310 will incide light own as the light of liquid crystal display device 300 incident outgoing is handled owing to be configured between light guide sheet 23 and the 1st polaroid 14.

In the common front lit, when illumination is lighted, from light guide sheet two jiaos of generation concealed wires on one side of configuration light source.Figure 52 illustrates the state that produces concealed wire.The state that Figure 52 (a) illustrates is: when the B side is watched light guide sheet 23, when to see one angle in two sides of the light guide sheet 23 of vertical quadrature of light source 22 being watched, concealed wire 600 extends toward opposition side sloped-end light guide sheet 23 and light source 22 ground from the boundary vicinity of another side and light source 22.The state that Figure 52 (b) illustrates is: with opposite among Figure 52 (a), with seeing when watching into the angle of above-mentioned another side, concealed wire 600 from the boundary vicinity of an above-mentioned side and light source 22 toward opposition side sloped-end light guide sheet 23 and light source 22 ground extension.

So watch under the situation that is subjected to this light-struck liquid crystal display device from the B side, when front lit was lighted, this concealed wire caused display performance to reduce.Therefore, mentioned above like that, configuration optical modulator body 310 between the light guide sheet 23 of front lit and the 1st polaroid 14 makes this light scattering layer 303 be suitable scattering state, thereby can prevent the display performance reduction that concealed wire causes when the B side is watched.Simultaneously, make visuality reduction, thereby can also protect privacy as the A side demonstration of non-use screen.

Then, describe another concrete composition of optical modulator body 310 in detail with Figure 44.The optical modulator body 310 of Figure 44 by the 3rd glass substrate the 301, the 4th glass substrate 302, select reflection switchable layer 320, a pair of

transparency electrode

304 and 305, λ/4

slices

304 and 305 to constitute.Select reflection switchable layer 320 to replace the light scattering layer 303 of the optical modulator body 310 of Figure 43, and λ/4 303 pairs of the 4th glass substrate 302 are configured in the B side.

Here, as selecting reflection switchable layer 320, use the broad-band-cholesteric liquid-crystal layer, and form transparency electrode 304 at whole screen.Adjust this broad-band-cholesteric liquid-crystal layer, become the state of the right-hand circularly polarized light in reflect visible light district selectively when making not making alive, becoming during making alive light is the non-modulation state of pellucidity.

When the A side is watched (right side of Figure 44), apply voltage toward a pair of transparency electrode 404, make and select reflection switchable layer 320 to be non-modulation state, thereby watch A side as before to show.Otherwise, when the B side is watched (left side of Figure 44), make from visuality and reduce the outside of unwanted A side, can also in the demonstration of B side, utilize the light that constitutes the bright demonstration on the A side again and from the light of B side penetrating LCD device spare 300.That is, when the B side was watched, linearly polarized light passed through to the A side of liquid crystal display device 300 through the 1st polaroid 14, and what comprise in this linearly polarized light that the front lit light belt comes incides the light that passes through behind the liquid crystal display device 300 to the contributive light of bright demonstration on the A side with from the B side.

Here, the axis of homology of the 1st polaroid 14 is set for be parallel to paper and be laterally (this direction is taken as 0 degree, clock is left-handed to be+).The hysteresis axle of λ/4 slices 330 is set for+45 degree, linearly polarized light by λ/4 slices 330 after, become right-hand circularly polarized light.Select reflection switchable layer 320 to be not alive state by making, only reflect right-hand circularly polarized light selectively, thereby can not watch the A side of liquid crystal display device 300 to show from the outside.The right polarized light that is reflected by λ/4 slices 330, reverts to original linearly polarized light once more.This linear polarization luminous energy penetrates the 1st polaroid 14, thereby can be reused for the demonstration of B side.At this moment, the surround lighting that incides optical modulator body 310 from the A side is also only reflected right-hand circularly polarized light, the then transmission of left light selectively.The left light of transmission becomes the light vertical with paper through λ/4 slices 330, is absorbed by the 1st polaroid 14.

Therefore, the composition of Figure 44 is preferably used in the A side display light that utilizes liquid crystal display device 300 in the demonstration of B side and is better than utilizing under the situation of surround lighting, the weak environment of the light of (A side) around just being used for.

Another concrete composition of optical modulator body 310 then, is described with Figure 45.Among Figure 45, for the 1st polaroid 14 of liquid crystal display device 300, B side part is identical with Figure 44, thereby omits.The composition of the optical modulator body 310 of Figure 45 is except that the set angle of λ/4 slices 330, and is identical with Figure 44.Here, the hysteresis axle of λ/4 slices 330 is set for+135 degree, the polarized light that makes the 1st polaroid by liquid crystal display device 300 slices 330 becomes left light in λ/4.

When the A side is watched (right side of Figure 45),, make and select reflection switchable layer 320 to be non-modulation state, thereby watch A side as before to show for a pair of transparency electrode 304 applies voltage.Otherwise, when the B side is watched (left side of Figure 45), because making alive not selects reflection switchable layer 320 only to reflect right-hand circularly polarized light selectively.At this moment, polarized light by liquid crystal display device 300 is a circularly polarized light, thereby penetrate and select reflection switchable layer 320, but incide from the A side optical modulator body 310 surround lighting about 50% be subjected to selecting 320 reflections of reflection switchable layer, thereby, can not see that the A side shows (contrast significantly reduces) as watching with half-mirror.Simultaneously, penetrate from about 50% residue surround lighting (left light) of A side and to select reflection switchable layer 320, through λ/4 slices 330, become the linearly polarized light that is parallel to paper, penetrate the 1st polaroid 14, thereby can be used for the demonstration of B side.Roughly the same when surround lighting utilization ratio at this moment and no optics preparer structure 310.

Therefore, opposite with the composition of Figure 44, the environment of the light intensity of (A side) around the composition of Figure 45 is preferably used in.

Can be with Figure 46 explanation according to the example of the method that illustrates among the method that illustrates among environment light intensity switching Figure 44 and Figure 45.The composition member of having stated label is identical with above-mentioned member.The optical modulator body 310 of Figure 46 has parallel alignment type nematic liquid crystal layer 340 (hereinafter referred to as liquid crystal layer 340), the 5th glass substrate the 341, the 6th glass substrate 342 and whole and goes up a pair of

transparency electrode

343 and 343 that forms, with λ/4 that replace Figure 44 and Figure 45 slices 330.Dispose the 5th glass substrate 341, transparency electrode 343, liquid crystal layer 340, transparency electrode the 343, the 6th glass substrate 342 successively from the A side toward the B side.The liquid crystal molecular orientation axle that makes liquid crystal layer 340 is+45 degree to the axis of homology of the 1st polaroid 14, and Δ nd is 3 λ/4 when setting not making alive for.

During environmental light intensity, making alive not on the liquid crystal layer 340.At this moment, penetrate the 1st polaroid 14 and be parallel to the phase differential of the polarized light of paper, become left light by liquid crystal layer 340 acquisition Δ nd=3 λ/4.Therefore, A side display light penetrates selects reflection switchable layer 320, but reflects about 50% strong surround lighting, forms as half-mirror, thereby keeps privacy.Simultaneously, can also in showing, the B side utilize the light transmissive left light of strong environment.

On the other hand, when surround lighting is weak, apply suitable voltage on liquid crystal layer 345, making the optical path difference Δ nd of liquid crystal layer 345 is λ/4.At this moment, the polarized light parallel with paper becomes right-hand circularly polarized light by the phase differential of liquid crystal layer 340 acquisition λ/4.Therefore, A side display light be can't see from the outside selecting reflection on the reflection switchable layer 320, can be used for the B side once more and show.

Also can be by liquid crystal layer 340 is controlled to other optical path difference, the control ellipticity becomes according to the most effective means of utilizing light of ambient light intensity liquid crystal layer 340.

The another concrete composition of optical modulator body 310 then, is described with Figure 47 and Figure 48.

Figure 47 illustrates the sectional view to sectional view quadrature shown in Figure 46 with Figure 42.That is, by the 1st polaroid 14 only with the polarized light of paper quadrature.

The optical modulation member 310 of Figure 47 is made of the 3rd glass substrate 301, a pair of

transparency electrode

304 and 304, prism-like member 400, liquid crystal 401.Dispose transparency electrode 304, prism-like member 400, liquid crystal 401, transparency electrode the 304, the 3rd glass substrate 301 successively from the A side toward the B side.

Prism-like member 400 is structures of making at the space utilization propylene resin of a pair of

transparency electrode

304 and 304 clampings.What this structure formed is shaped as: remove from the space of a pair of

transparency electrode

304 and 304 clampings on the 3rd glass substrate 301 with the direction of the axis of homology quadrature of the 1st polaroid 14 and arrange a plurality of the extension abreast with this axis of homology and the trequetrous space of about 60 degree of drift angle, and a rectangle parallel sided that makes this post is arrangement pitches in the 3rd glass substrate 301 to equal triangle length (about 100 μ m) on one side.

The 3rd glass substrate 301 of bonding this prism-like member 400 and formation transparency electrode 304, and at hole portion filling liquid crystal 401.Liquid crystal 401 adopts eurymeric liquid crystal ZLI-5049-100 (manufacturing of MERCK company), Δ n=0.2027 (the refractive index n o to normal light is 1.5065, is 1.7092 to the refractive index n e of unusual light).At this moment, liquid crystal molecular orientation is the even orientation of the direction of vertical paper.Figure 48 is the stereographic map of the optical modulator body 310 of Figure 47.The axis of homology of the 1st polaroid 14 is parallel with the molecular orientation of liquid crystal 401.

When watching the A side to show, on a pair of up and down transparency electrode 304, apply voltage, make liquid crystal molecule respond (left side of Figure 47).At this moment, penetrate advancing of the 1st polaroid perpendicular to the polarized light of paper refractive index n o=1.5065 according to 401 pairs of normal lights of liquid crystal.Here, the refractive index of propylene resin is about 1.5, thereby this polarized light almost do not have refringence on the interface of liquid crystal 401 and prism-like member 400, advances always.At this moment, optical modulation member 310 becomes the non-modulation state of light path, inner light path is set for do not change from the advance direct of travel of the light that comes of the 1st polaroid 14.

On the other hand, when the B side is watched,, make liquid crystal molecule perpendicular to paper (right side of Figure 47) as not alive state.At this moment, penetrate advancing of the 1st polaroid 14 perpendicular to the polarized light of paper refractive index n e=1.7092 according to 401 pairs of unusual light of liquid crystal, here, the refractive index of propylene resin is about 1.5, thereby this polarized light produces reflection and refraction according to the refringence on the interface of liquid crystal 401 and prism-like member 400.At this moment, optical modulator body 301 becomes the optical path modulation state, inner light path is set for make from the advance direct of travel bending of the light that comes of the 1st polaroid 14.

Thus, can not watch the A side to show, advance after this interface is divided into normal light and unusual light from the surround lighting of A side incident simultaneously.At this moment, to perpendicular to the polarized light refractive index of paper since the refractive index of liquid crystal 401 greater than the refractive index of prism-like member 400, surround lighting efficiently is taken in this not total reflection of interface, can be used for the B side and shows.

Another concrete composition of optical modulator body 310 then, is described with Figure 49 and Figure 50.

As Figure 49 and shown in Figure 50, this optical modulator body 310 uses the disk shape member 402 of the column type of falling the semicircle of the about 100 μ m of spacing that make with propylene resin.Figure 49 is and the equidirectional sectional view of Figure 47 that Figure 50 is a stereographic map.Disk shape member 402 make the triangular prism in the space that formation removes from the space of a pair of

transparency electrode

304 and 304 clampings in order to form prism-like member 400 conspire to create into the rectangle cross section parallel with the 3rd glass substrate 301 the semicolumn string.The bearing of trend of semicolumn is parallel with the axis of homology of the 1st polaroid 14, and the diameter of semicircle equals above-mentioned spacing, about 100 μ m.

When watching the A side to show, on a pair of up and down transparency electrode 304, apply voltage, make liquid crystal molecule respond (left side of Figure 49).At this moment, light is advanced always, and is identical with Figure 47.In the case, optical modulation member 310 becomes the non-modulation state of light path, inner light path is set for do not change from the advance direct of travel of the light that comes of the 1st polaroid 14.

On the other hand, when the B side is watched,, make liquid crystal molecule perpendicular to paper (right side of Figure 49) as not alive state.In the composition of Figure 48 and Figure 49, liquid crystal 401 forms curved surface with the interface of disk shape member 402, from the polarized light vertical of liquid crystal display device 300 with paper in this interfacial refraction, reflection, but owing to make refractive index is 1.7092 and 1.5 interface, incident angle produces total reflection more than or equal to this polarized light of about 60.7 degree, can be reused for the B side.Owing to the surround lighting from the A side does not produce total reflection, be taken into again, can be used for the B side of liquid crystal display device 300.At this moment, optical modulator body 310 becomes the optical path modulation state, sets inner light path, makes from the advance direct of travel bending of the light that comes of the 1st polaroid 14.

Another concrete composition of optical modulator body 310 then, is described with Figure 51.

The optical modulator body 310 of Figure 51 is made of the 3rd glass substrate the 301, the 4th glass substrate 302, host and guest's liquid crystal layer 500, a pair of transparency electrode 304 and 304.Dispose the 3rd glass substrate 301, transparency electrode 304, host and guest's liquid crystal layer 500, transparency electrode the 304, the 4th glass substrate 302 successively from the A side toward the B side.Form transparency electrode 304 at whole screen.Host and guest's liquid crystal layer 500 usefulness liquid crystal molecules are orientated, and the axis of homology of pigment molecular and the 1st polaroid 14 is orientated (right side of Figure 51) abreast when making making alive not.At this moment, the polarized light by the 1st polaroid 14 is absorbed by this pigment molecular.This forms light becomes absorbing state to optical modulator body 310 travel condition.When applying voltage, liquid crystal molecule is to the 3rd glass substrate 301 and the 4th glass substrate 302 approximate vertical orientation, and the absorption that pigment causes reduces, thereby becomes pellucidity.This is light becomes transmissive state to optical modulator body 310 a travel condition.

When the A side is watched, apply voltage toward a pair of

transparency electrode

304 and 304, make host and guest's liquid crystal layer 500 be non-modulation state (pellucidity), optical modulator body 310 is become the travel condition (left side of Figure 51) of transmissive state, can watch A side as before to show thereby switch to light.On the other hand, when the B side was watched, by host and guest's liquid crystal layer 500 is taken as modulation condition, switching to light became the travel condition (right side of Figure 51) of absorbing state to optical modulator body 310, thereby can not watch the A side to show from the outside.

Also can make the orientation of liquid crystal molecule have the above helical structure of 360 degree, and absorb the WT pattern of whole polarized lights when using making alive not.

So far, set forth present embodiment.In whole examples, but the protective cover of optical modulator body 310 double as front lits (light guide sheet 23).In the past, front lit need prevent dust antifouling usefulness protective cover, but, do not need to be provided with separately protective cover by optical modulator body 310 is configured to protective cover, can reduce the thickness of entire equipment.

Also can set up an organization, switch the modulation condition and the non-modulation state of optical modulator body 310 in linkage with the action of the display screen that uses in the A side of switching liquid crystal display spare 1 and the B side display screen.At this moment, do not need to indicate the operation of optical modulator body 310 action switchings.

So far, each embodiment has been described.The embodiment and the embodiment that finish in the invention preferred forms part illustrate the technology of the present invention content after all, should not only limit to this instantiation narrow sense ground and explain, in spirit of the present invention and claims scope of putting down in writing later, can do various conversion and put into practice.

Industrial practicality

The present invention can be used for portable phone, notebook type PC, portable terminal device, televisor, digital camera etc., can carry out excellent screen and show.

Claims

1, a kind of display device is characterized in that,

The display media of state with control transmitted light, will be from described display media the side of the either party the both sides toward the described display media of clamping as the 1st side,, and dispose successively as the 2nd side toward the opposing party's a side from past described the 2nd side of described the 1st side

Described display media and

The light of the 1st state is reflected and the light transmissive selection reflection means of the 2nd state;

To described display media, only dispose described selection reflection means in described the 2nd side.

2, the display device described in claim 1 is characterized in that,

Described state is a polarization state,

Described selection reflection means is that the light of the 1st polarization state is reflected and the light transmissive polarized light selection reflection means of the 2nd polarization state,

Dispose successively from described the 1st side toward described the 2nd side

Only make light transmissive the 1st polarization means that become regulation polarization state component,

Described display media,

Described polarized light select reflection means and

Absorption becomes the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means of described the 2nd polarization state component.

3, the display device described in claim 2 is characterized in that,

Described regulation polarization state is a linear polarization state,

Described the 1st polarization state is the 1st directional ray polarization state, and described the 2nd polarization state is the 2nd a directional ray polarization state with described the 1st direction quadrature,

Described display media is the two formula liquid crystal layers of turning round of 90 degree.

4, the display device described in claim 2 or 3 is characterized in that,

Described the 2nd polarization state is a linear polarization state,

In described the 2nd side configuration λ/4 of described the 2nd polarization means slice.

5, the display device described in claim 1 is characterized in that,

Described state is the circular polarization state,

Described selection reflection means is to make the light reflection of the 1st circular polarization state and make the light transmissive polarized light of the 2nd circular polarization state of sense of rotation and described the 1st circular polarization opposite states select reflection means,

Dispose successively from described the 1st side toward described the 2nd side

Only make prescribed direction light transmissive the 1st axis of homology polarization means that become the linear polarization component,

The 1st λ/4 slice,

Described display media,

Described polarized light selection reflection means,

The 2nd λ/4 slice and

Have the 2nd axis of homology polarization means with the axis of homology of the direction of described the 1st axis of homology polarization means quadrature.

6, as each described display device in the claim 1 to 5, it is characterized in that,

Have absorption and be transmitted to the absorber of light that finish described the 2nd rear flank, make it insert and to withdraw from light path.

7, as each described display device in the claim 1 to 6, it is characterized in that,

The 1st color filter and the 2nd color filter that is located at described the 2nd side of described selection reflection means with described the 1st side that is located at described display media.

8, as each described display device in the claim 1 to 6, it is characterized in that,

Described the 1st side at described display media has color filter, and described color filter has multiple transmissivity district in each pixel of described display media.

9, the display device described in claim 8 is characterized in that,

As described transmissivity district, have described the 2nd side and carry out transmission-type and be arranged in the high-transmission rate district that opposed transmissivity is high on described the 1st side the non-transmission area to transmitted light when showing and be arranged on the low transmissivity district that the transmissivity of the transmission area of described transmitted light is lower than described high-transmission rate district from described the 1st side to described the 2nd side.

10, as each described display device in the claim 1 to 4, it is characterized in that,

Have the light absorption medium in described the 2nd side that drives the drive wire that described display media uses.

11, as each described display device in the claim 1 to 4, it is characterized in that,

Form the drive wire that the described display media of driving is used with the low reflecting material that reflection of light is suppressed to below the ormal weight.

12, as each described display device in the claim 1 to 4, it is characterized in that,

Make described the 1st side carry out reflection-type when showing and described the 2nd side carry out transmission-type when showing, make the bright dark upset of video data.

13, as each described display device in the claim 1 to 4, it is characterized in that,

Make described the 1st side carry out reflection-type when showing and described the 2nd side carry out transmission-type when showing, make video data about upset.

14, as each described display device in the claim 1 to 4, it is characterized in that,

Make described the 1st side carry out reflection-type when showing and described the 2nd side carry out transmission-type when showing, make spinning upside down of video data.

15, the display device described in claim 1 is characterized in that,

To described display media, the non-transmission area of light is set in described the 2nd side;

To described non-transmission area, dispose described selection reflection means in described the 2nd side;

Between at least a portion and described display media of described non-transmission area, be provided with from the 1st side toward the 2nd side by the reflection of light means of described display media.

16, the display device described in claim 15 is characterized in that,

Described state is a polarization state,

Dispose successively from described the 1st side toward described the 2nd side

Described display media,

Described polarized light select reflection means and

Absorption becomes the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means of described the 2nd polarization state component,

A pair of transparent substrates with the described display media of clamping,

Select reflection means to be configured in described the 2nd side described polarized light with respect to the transparent substrates that is in described the 2nd side in the described a pair of transparent substrates,

At described display media and be between the described transparent substrates of described the 2nd side described non-transmission area is set.

17, the display device described in claim 16 is characterized in that,

The polarized state of light that described display media control is passed through makes

Under the bright show state when described the 1st side is watched, at light that described reflection means is reflected and the light of selecting reflection means to be reflected at described polarized light after described the 1st side incident of described the 1st polarization means, penetrate described the 1st polarization means once more after described the 1st side incident of described the 1st polarization means;

And show under the state in showing slinkingly when described the 1st side is watched, at light that described reflection means is reflected with select the light of reflection means after described the 1st side incident of described the 1st polarization means towards described polarized light, do not penetrate described the 1st polarization means once more after described the 1st side incident of described the 1st polarization means.

18, the display device described in claim 17 is characterized in that,

Described regulation polarization state is the 1st polarization state;

To light from described the 1st polarization means of described the 1st side transmission, under bright show state, polarization state is changed,

And show under the state showing slinkingly, the polarized state of light that control is passed through, make the phase differential position zero when described the 1st polarization state between each component that is fixed on the polarized light orthogonal axes in the face parallel with described transparent substrates, be pi/2 roughly in the end point of passing through from described the 1st polarization means toward the light of described reflection means, also be π roughly in the end point of passing through from described reflection means toward the light of described the 1st polarization means simultaneously, the end point of the light from described the 1st polarization means toward described polarized light selection reflection means is π roughly.

19, the display device described in claim 18 is characterized in that,

Be in the described display media between described the 1st polarization means and the described reflection means and be in described the 1st polarization means and the opposed described polarized light of different described reflection means is selected display media between the reflection means, connecting thickness that described the 1st side and the direction of described the 2nd side see than being roughly 1 to 2.

20, as each described display device in the claim 17 to 19, it is characterized in that,

Described display media is under the conventional state that shows, described polarized light selects reflection means to make the wide part transmission that arrives from the 1st side, described the 1st polarization means absorb the most of light that arrives from described reflection means reflection back, and described the 2nd polarization means make the wide part transmission that arrives from described the 1st side;

Under the maximum drive state that shows, described polarized light selects reflection means to make the wide partial reflection that arrives from described the 1st side, and described 1 polarization means make the wide part transmission that arrives from described reflection means reflection back.

21, the display device described in claim 1 is characterized in that,

The viewing area of described display media be divided at least make the light that incides described display media from described the 1st side be transmitted to the transmission running of the 2nd side to described display media and make the light that incides described display media from described the 1st side described display media is reflexed to the 2nd side the reflection running the 1st district and carry out and will reflex to the 2nd district that the reflection of the 1st side operates from the light of described the 1st side by described display media

Described display media in described the 2nd side, is disposed from the reflection of light means of past described the 2nd side of described the 1st side by described display media,

Described the 2nd district is carried out the reflection running in described the 2nd district by described reflection means; Can finish

The transmission running in described the 1st district that utilizes described the 2nd state of control to make the transmission of described selection reflection means and form, will be used for from the light that described the 1st side incides described the 1st district to the demonstration on described the 2nd side of described display media the transmission-type demonstration,

The reflection running in described the 1st district that utilizes described the 1st state of control to make described selection reflection means reflection and form, will be used for from the light that described the 1st side incides described the 1st district to the 1st reflection-type demonstration of the demonstration on described the 1st side of described display media and

Utilize the reflection running in described the 2nd district will be used for from the light that described the 1st side incides described the 1st district the 2nd reflection-type of the demonstration on described the 1st side of described display media is shown.

22, the display device described in claim 21 is characterized in that,

During described the 1st reflection-type shows, to light-operatedly make described the 1st state from what described the 1st side incided the 1st district, make its reflection by described selection reflection means, form bright show state, and will light-operatedly make described the 2nd state from what described the 1st side incided the 1st district, make it penetrate described selection reflection means, form to show slinkingly and show;

During described the 2nd reflection-type shows, arrive beholder by the light that makes the reflection of described reflection means to the 1st side of described display media, form bright demonstration, and do not arrive beholder, form to show slinkingly and shows the 1st side of described display media by the light that makes the reflection of described reflection means;

During described the 1st reflection-type demonstration and described the 2nd reflection-type showed, bright show state showed that with showing slinkingly state is consistent respectively.

23, the display device described in claim 22 is characterized in that,

During described transmission-type shows, to light-operatedly make described the 1st state from what described the 1st side incided the 1st district, make its reflection by described selection reflection means, formation shows slinkingly shows state, and will light-operatedly make described the 2nd state from what described the 1st side incided the 1st district, make it penetrate described selection reflection means, form bright demonstration.

24, the display device described in claim 21 is characterized in that,

Described state is a polarization state,

Described demonstration means are only made light transmissive the 1st polarization means that become regulation polarization state component in described the 1st side configuration.

25, the display device described in claim 24 is characterized in that,

Described regulation polarization state is a linear polarization state,

The axis of homology of described the 1st polarization means and described polarized light are selected the axis of homology quadrature of reflection means,

When the minimum voltage that described display media is applied in the driving voltage,

The light that incides described the 1st district from described the 1st side forms elliptically polarized light or the linearly polarized light with major axis parallel with the axis of homology of described polarized light selection reflection means at described polarized light selection reflection means, and

The light that incides described the 2nd district from described the 1st side forms elliptically polarized light or circularly polarized light at described reflection means.

26, the display device described in claim 24 is characterized in that,

Described regulation polarization state is a linear polarization state,

When the ceiling voltage that described display media is applied in the driving voltage,

27, the display device described in claim 25 or 26 is characterized in that,

It is that ellipticity is less than or equal to 0.3 elliptically polarized light that described polarized light is selected described elliptically polarized light and described linearly polarized light on the reflection means,

Described elliptically polarized light on the described reflection means and circularly polarized light be ellipticity more than or equal to or 0.7 elliptically polarized light.

28, the display device described in claim 27 is characterized in that,

The described elliptically polarized light on the described polarized light selection reflection means and the ellipticity of described linearly polarized light are less than or equal to 0.22.

29, the display device described in claim 27 is characterized in that,

The described elliptically polarized light on the described reflection means and the ellipticity of described circularly polarized light are more than or equal to 0.78.

30, the display device described in claim 25 or 26 is characterized in that,

The optical compensation means that described display media had at least optical path difference in described the 1st side configuration.

31, the display device described in claim 30 is characterized in that,

The optical compensation means that described display media had optical path difference in described the 2nd side configuration.

32, the display device described in claim 30 is characterized in that,

Described optical compensation means are made up of a plurality of optical compensatory elements.

33, the display device described in claim 27 is characterized in that,

The described display media in described the 2nd district is optical path difference more than or equal to 150nm, is less than or equal to the 90 degree twisted-nematic liquid crystal floor of 340nm.

34, the display device described in claim 27 is characterized in that,

The described demonstration matchmaker in described the 1st district is the 90 degree twisted-nematic liquid crystal floor of optical path difference more than or equal to 400nm.

35, the display device described in claim 25 is characterized in that,

Between described the 1st polarization means and described display media, configuration has the 1st optical compensation means of optical path difference,

Select between the reflection means at described display media and described polarized light, the optical compensatory element that configuration has optical path difference,

Select reflection means in described 2 sides to described polarized light, configuration absorbs to be become the light of described the 1st polarization state component and makes light transmissive the 2nd polarization means that become described the 2nd polarization state,

Described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the roughly relation of quadrature, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of minimum voltage in the driving voltage and described the 1st optical compensation means satisfies-175nm≤(Rr-R1)≤-105nm, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensation means has the roughly relation of quadrature, and the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of minimum voltage in the driving voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 190nm≤(Rr-R1+R2)≤30nm.

36, the display device described in claim 26 is characterized in that,

Select between the reflection means at described display media and described polarized light, the 2nd optical compensatory element that configuration has optical path difference,

Described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the roughly relation of quadrature, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of ceiling voltage in the driving voltage and described the 1st optical compensation means satisfies-175nm≤(Rr-R1)≤-105nm, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensation means has the roughly relation of quadrature, and the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of ceiling voltage in the driving voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 190nm≤(Rr-R1+R2)≤30nm.

37, the display device described in claim 25 is characterized in that,

Described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the relation of almost parallel, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of minimum voltage in the driving voltage and described the 1st optical compensation means satisfies-175nm≤(Rr-R1)≤-105nm, the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of described minimum voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 25nm≤(Rr-R1+R2)≤50nm when the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensation means has concerning of almost parallel, or the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensatory element satisfies when having concerning of quadrature roughly-50nm≤(Rr-R1-R2)≤25nm.

38, the display device described in claim 26 is characterized in that,

Described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the relation of almost parallel, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of ceiling voltage in the driving voltage and described the 1st optical compensation means satisfies-175nm≤(Rr-R1)≤-105nm, the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of described ceiling voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 25nm≤(Rr-R1+R2)≤50nm when the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensation means has concerning of almost parallel, or the hysteresis axle of the axis of guide of liquid crystal molecule and described the 2nd optical compensatory element satisfies when having concerning of quadrature roughly-50nm≤(Rr-R1-R2)≤25nm.

39, the display device described in claim 25 is characterized in that,

Described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the roughly relation of quadrature, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of minimum voltage in the driving voltage and described the 1st optical compensation means satisfies 100nm≤(Rr-R1)≤170nm, the hysteresis axle of the axis of guide of liquid crystal molecule and the 2nd optical compensation means has the roughly relation of quadrature, and the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of described minimum voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 190nm≤(Rr-R1-R2)≤300nm.

40, the display device described in claim 26 is characterized in that,

Described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the roughly relation of quadrature, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of ceiling voltage in the driving voltage and described the 1st optical compensation means satisfies 100nm≤(Rr-R1)≤170nm, the hysteresis axle of the axis of guide of liquid crystal molecule and the 2nd optical compensation means has the roughly relation of quadrature, and the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of described ceiling voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies 190nm≤(Rr-R1-R2)≤300nm.

41, the display device described in claim 25 is characterized in that,

Described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the relation of almost parallel, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of minimum voltage in the driving voltage and described the 1st optical compensation means satisfies 100nm≤(Rr-R1)≤170nm, the hysteresis axle of the axis of guide of liquid crystal molecule and the 2nd optical compensation means has the roughly relation of quadrature, and the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of described minimum voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies-50nm≤(Rr-R1-R2)≤50nm.

42, the display device described in claim 26 is characterized in that,

Described display media is the liquid crystal layer of almost parallel orientation, the axis of homology of the axis of homology of described the 1st polarization means and described the 2nd polarization means has the relation of almost parallel, the hysteresis axle of the axis of guide of liquid crystal molecule and described the 1st optical compensation means has the roughly relation of quadrature, the value that applies the optical path difference R1 of the value of optical path difference Rr of described liquid crystal layer in described the 2nd district of state of ceiling voltage in the driving voltage and described the 1st optical compensation means satisfies 100nm≤(Rr-R1)≤170nm, the hysteresis axle of the axis of guide of liquid crystal molecule and the 2nd optical compensation means has the roughly relation of quadrature, and the value that applies the optical path difference R2 of the value of optical path difference R1 of the value of optical path difference Rt of described liquid crystal layer in described the 1st district of state of described ceiling voltage and described the 1st optical compensation means and described the 2nd optical compensation means satisfies-50nm≤(Rr-R1-R2)≤50nm.

43, the display device described in claim 21 is characterized in that,

In described the 1st side, configuration has the light scattering means of light scattering function to described display media.

44, the display device described in claim 43 is characterized in that,

The degree of distributing always of described display device more than or equal to 50, be less than or equal to 95.

45, the display device described in claim 25 or 26 is characterized in that,

The horizontal direction of the device posture of the direction of the axis of homology of described the 1st polarization means when using described display device is consistent.

46, as each described display device in the claim 1,2,3,4,15 and 21, it is characterized in that,

Have the optical modulation means that to switch travel condition at least one side of described the 1st side of described display device and described the 2nd side to the regulation incident emergent light of described display device in accordance with regulations like that.

47, the display device described in claim 46 is characterized in that,

The light of described optical modulation means to advancing toward outside direction from described display device in the described incident emergent light, switching form the described travel condition of transmissive state to described optical modulation means and described optical modulation means are formed the described travel condition of scattering state.

48, the display device described in claim 47 is characterized in that,

Configuration is shone the light of the demonstration usefulness of described display device as the incident light in the described incident emergent light rayed means,

Described optical modulation means are configured in described display media side with respect to described rayed means, are becoming under the travel condition of described scattering state, make the light of described rayed means irradiation form scattering state to described optical modulation means.

49, the display device described in claim 46 is characterized in that,

The light of described optical modulation means to advancing toward outside direction from described display device in the described incident emergent light, switching form the described travel condition of transmissive state to described optical modulation means and described optical modulation means are formed the described travel condition of reflective condition.

50, the display device described in claim 46 is characterized in that,

Described optical modulation means switch that a side that the both sides of the light of 2 polarization states with mutually orthogonal relation form the light of the described travel condition of transmissive state and described 2 polarization states to described optical modulation means forms reflective condition to described optical modulation means and the opposing party to the described travel condition of described optical modulation means formation transmissive state.

51, the display device described in claim 46 is characterized in that,

The light of described optical modulation means to advancing toward outside direction from described display device in the described incident emergent light, switch in setting in the described optical modulation means do not change direct of travel light path described travel condition and in described optical modulation means, set the described travel condition of the light path that makes the direct of travel bending.

52, the display device described in claim 46 is characterized in that,

The light of described optical modulation means to advancing toward outside direction from described display device in the described incident emergent light, switching form the described travel condition of transmissive state to described optical modulation means and described optical modulation means are formed the described travel condition of absorbing state.

53, the display device described in claim 46 is characterized in that,

The rayed means of the light of the demonstration usefulness of the described display device of configuration irradiation, and the protective cover of the described rayed means of described optical modulation means double as.

54, as each described display device in the claim 46 to 53, it is characterized in that,

Described optical modulation means use screen to switch described travel condition in linkage with in the display screen on described the 2nd side of display screen on described the 1st side of described display device and described display device any is used as.

55, a kind of display device mounting device is characterized in that,

Load each described display device in the claim 1,2,3,4,15,21 and 46, and can be folded into described display device described the 1st side display surface outwardly, the display surface that also makes described the 2nd side simultaneously is inwardly.

56, the display device mounting device described in claim 55 is characterized in that,

Folded state adopts the member that carries out light absorption with the opposed member of described the 2nd side display surface of described display device down.

57, the display device mounting device described in claim 55 or 56 is characterized in that,

Has the operation push-button that indication is overturn demonstration on described the 1st side of described display device and the demonstration on described the 2nd side mutually.

58, the display device mounting device described in claim 57 is characterized in that,

Described operation push-button is the automatic operation push-button of operating and indicating described demonstration upset with folding switch motion in linkage automatically.

59, a kind of display device mounting device is characterized in that,

Load each described display device in the claim 1,2,3,4,15,21 and 46, and have and can be configured to member opposed with the display surface of described the 2nd side of described display device and that carry out light absorption.