CN2606372Y - Liquid crystal display device and electronic apparatus - Google Patents

Abstract

The utility model provides a semi-transmitting reflecting liquid crystal display device with excellent observation particularly improving the luminance when in transmission mode. The liquid crystal display device 20 of the utility model is the semi-transmitting reflecting liquid crystal display device holding the liquid crystal 26 between the upper base plate 24 and the lower base plate 23 arranged vis-a-vis each other, arranging a semi-transmitting reflecting layer 35 comprising cholestane liquid crystal layers 34r, 34g, 34b on the lower base plate 23, and having a backlight source 22. Phase difference plates 42, 44, and polarization filter plates 43, 45 are separately arranged in turn starting from one side of the base plate on the outsides of the upper base plate 24 and the lower base plate 23, and on the lower side of the semi-transmitting reflecting layer 35, a pigment color filter layer 32 having pigment layers 31r, 31g, 31b making the semi-transmitting reflecting layer 35 transmit the chromatic light with the same color as the selection reflection light of the cholestane liquid crystal layers 34r, 34g, 34b is arranged.

Description

Liquid crystal indicator and electronic equipment

Technical field

The utility model relates to liquid crystal indicator and electronic equipment, particularly relates to the formation of the liquid crystal indicator of the Transflective that not only also has good the watching property that can carry out bright fully demonstration when reflective-mode when transmission mode.

Background technology

Reflective liquid crystal indicator owing to do not have the light source of backlight etc., so power consumption is little, just was used for all mancarried electronic aids etc. in the past more.Yet reflective liquid crystal indicator owing to utilize the outer light of natural light or illumination light etc. to show, just exists the problem that is difficult to watch demonstration at dark place, place.So people have just proposed such liquid crystal indicator: similarly utilize outer light in bright place with common reflective LCD device, then watch demonstration to become possibility by means of the light source of inside is feasible at dark place, place.Promptly, this liquid crystal indicator, be a kind ofly to have both reflective and display mode transmission-type by means of employing, and according to around brightness switch to the display mode of any pattern in reflective-mode or the transmission mode, even if make the device shown that when reducing power consumption, under dark occasion, also can become clear.Below, in this manual, this liquid crystal indicator is called ' transflective liquid crystal display device '.

Form as the transflective liquid crystal display device, people proposed at infrabasal plate inner face (below, in this manual, sometimes also the face of the liquid crystal side of substrate is called inner face, outside the face of a side is called in contrast) be provided with the reflectance coating that on metal films such as aluminium, has formed transmittance usefulness slit (opening portion), make this reflectance coating play a part the liquid crystal indicator of Transflective film.This liquid crystal indicator has the influence of the parallax that prevents that the thickness by infrabasal plate from causing owing on the inner face of infrabasal plate metal film being set, particularly prevent the effect of colour mixture in the structure of using color filter.

Figure 13 shows an example of the transflective liquid crystal display device of using this Transflective film.

In this liquid crystal indicator 100, between a pair of transparency carrier 101,102, seized liquid crystal 103 on both sides by the arms, stacked reflectance coating 104, dielectric film 106 on infrabasal plate 101, form the downside electrode 108 that the nesa coating by indium tin oxide (below be abbreviated as ITO) etc. constitutes thereon, form alignment films 107, make downside electrode 108 is covered.On the other hand, on upper substrate 102, formation has R (red), G (green), each uveal color filter 109 of B (indigo plant), the stack flat film 111 thereon, lateral electrode 112 on forming on this planarization film 111 that nesa coating by ITO etc. constitutes, form alignment films 113, make lateral electrode on this 112 is covered.

Reflectance coating 104, the metal film high with the light reflectivity of aluminium etc. forms, and on this reflectance coating 104, all forms the slit 110 that transmittance is used on each pixel.By means of this slit 110, reflectance coating 104 plays a part Transflective film (therefore, this film being called the Transflective film).In addition, the outside of upper substrate 102 side begin to dispose successively from upper substrate 102 1 sides forward scattering plate 118, polarizer 119, on polarization plate 114, dispose 1/4 wavelength plate 115, polarization plate 116 down successively in the outside of infrabasal plate 101 side.In addition, backlight 117 (lighting device) the following side that is configured in infrabasal plate 101 is than following polarization plate 116 down below also.

When under reflective-mode, using liquid crystal indicator shown in Figure 13 under the bright place, the outer light of the sunshine of going into to shine from the top of upper substrate 102, illumination light etc. is seeing through liquid crystal 103 and after the reflection of the surface of the Transflective film 104 on the infrabasal plate 101, see through liquid crystal 103 once more, to upper substrate 102 1 side outgoing.In addition, be in when using under the transmission mode in dark place, from the light of backlight 117 outgoing of the below that is arranged on infrabasal plate 101,110 the part place Transflective film 104 in the slit then, sees through liquid crystal 103, to upper substrate 102 1 side outgoing.The result becomes to these light and participates in showing with various patterns.

Yet, reflection horizon as such reflective LCD device, used for example high metal film of light reflectivity of aluminium or silver etc. in the past, with respect to this, in the last few years, people have proposed to make the thin dielectric film with different refractive indexes alternatively to carry out the dielectric mirror of lamination or have used the cholesterol reflecting plate of cholesteryl liquid crystal, perhaps use the scheme of the holographic reflecting plate etc. of hologram component.These novel reflecting plates use the feature of constituent material not only to work as catoptrical reflecting plate neatly, also have functions peculiar.

Wherein, cholesteryl liquid crystal presents liquid crystal phase more than a certain temperature (liquid crystal transition temperature), and in liquid crystal phase, liquid crystal molecule adopts with certain pitch helical structure periodically.Owing to this structure, have the light of the optionally reflection wavelength consistent with the pitch of spiral, see through the character of light in addition.Therefore since can be for example uitraviolet intensity when making the liquid crystal sclerosis or the temperature pitch of controlling spiral, so can change catoptrical color partly, can be used as reflective color filter.In addition, if make the cholesteryl liquid crystal layer of the coloured light of the different color of a plurality of selection reflections carry out lamination, can also play a role as reflecting plate with all reflect white of rhythmo structure.

But, in such existing transflective liquid crystal display device shown in Figure 13, exist such problem: irrelevant although can watch demonstration with having or not of outer light,, with when the reflective-mode relatively, the brightness of the demonstration during transmission mode is much lower.This is that being presented at when resulting from transmission mode only can be utilized only about half of this point within the light that penetrates from backlight in the demonstration, have only the light in the slit of having passed through the Transflective film just in demonstration, to utilize this point and be provided with the problem of 1/4 wavelength plate and following polarization plate this point etc. in the outside of infrabasal plate one side.

In existing transflective liquid crystal display device, reflex time during with transmission display mode be different, particularly within the light that when transmission, penetrates from backlight only about half of by on polarization plate absorb and have only the remaining only about half of demonstration that just is used in.In other words, with respect under the situation of reflective-mode, the major part of the linearly polarized light of going into to shine from upper substrate one side is used for obviously showing, similarly show that under the situation of transmission mode the light that advances to upper substrate one side from the lower surface of liquid crystal layer just must be circularly polarized light substantially for reflective-mode the time.Yet, half within this circularly polarized light and since from upper substrate when the outside is penetrated by on polarization plate sponge, so just become finally for only incide within the light on the liquid crystal layer substantially half just participate in the demonstration.As mentioned above, just existed the essential factor of the demonstration deepening under transmission mode originally from displaying principle.

In addition, when transmission mode owing to utilize the light in transmission slit to show, thus the area in slit to the ratio (aperture opening ratio in other words) of the area of whole Transflective film with about the brightness of demonstration.If strengthen this aperture opening ratio, though becoming, the demonstration can make transmission mode the time becomes clear, when aperture opening ratio increases, because the area of the non-opening portion of Transflective film reduces, so the demonstration deepening of reflective-mode.Therefore, in order to ensure the brightness of reflective-mode, just can not be increased to the aperture opening ratio in slit to a certain degree more than, the brightness that improves transmission mode exists a boundary.

Secondly, in the transflective liquid crystal display device, need 1/4 wavelength plate from its displaying principle in the outside of infrabasal plate one side, the brightness when transmission mode is just not enough for this reason, below its reason of explanation.But, in the following description, show showing slinkingly under applying state at non-selection voltage, selecting voltage to apply the next formation of obviously showing of state, describe.

At first, in liquid crystal indicator shown in Figure 13 100, carrying out under the situation that showing slinkingly of reflective-mode show, the light of going into to shine from the outside of upper substrate 102, polarization plate 114 sees through under the axle situation parallel with paper on establishing, owing to the last polarization plate 114 that sees through on the upper substrate 102, become to having the linearly polarized light of the polarizing axis parallel with paper, become by means of the birefringence effect of liquid crystal 103 in during through liquid crystal 103 and be circularly polarized light substantially.Then, carry out reflex time when the surface of the Transflective film 104 on infrabasal plate 101, become the circularly polarized light for contrary rotation, transflective liquid crystal 103 once more, and the linearly polarized light that becomes to having the polarizing axis vertical with paper arrives substrate 102.Here, because the last polarization plate 114 of upper substrate 102 is to have the polarization plate that see through axle parallel with paper, so light in the reflection of Transflective film 104 places, absorbed by last polarization plate 114 and not the outside of rework solution crystal device 100 (beholder's one side), liquid crystal indicator 100 becomes to showing slinkingly and shows.

Otherwise, under the situation about obviously showing of reflective-mode, after adding voltage for liquid crystal 103, because the direction of orientation of liquid crystal 103 changes, so the outer light of going into to shine from the outside of upper substrate 102, seen through just to become behind the liquid crystal 103 and be linearly polarized light, be not reflected at Transflective film 104 places with not adding any change, keep having last polarization plate 114 returning to external (beholder one side) of the original state ground of the linearly polarized light parallel with paper through upper substrate 102, liquid crystal indicator 100 obviously shows.

On the other hand, in above-mentioned liquid crystal indicator 100, carrying out under the situation of the demonstration under the transmission mode, from the light of backlight 117 ejaculations, from the lateral liquid crystal cells incident of infrabasal plate 101, within this light those transmissions the light in slit 110 become the light that shows for participating in.

, in liquid crystal indicator 100, show that as mentioned above, with same when the reflective-mode, 110 light that advance to upper substrate 102 must be that substantially circularly polarized light can not from the slit here in order to show slinkingly.Therefore, owing to penetrate and light by slit 110 must become and is circularly polarized light substantially, be used for making the linearly polarized light that has seen through behind time polarization plate 116 to be transformed into 1/4 wavelength plate 115 of circularly polarized light substantially so must have from backlight 117.

Here, the light that penetrates from backlight 117, if be conceived to those not light in transmission slit 110, then establishing from backlight 117 ejaculations, and seeing through under the axle situation vertical of following polarization plate 116 with paper, that sees through polarization plate 116 down be engraved in for the moment become to the linearly polarized light vertical with paper after, by means of through 1/4 wavelength plate 115, become and be circularly polarized light substantially, arrival Transflective film 104.Then, after the lower surface place at Transflective film 104 is reflected, become circularly polarized light, through behind 1/4 wavelength plate 115, become once more to having the linearly polarized light of the polarizing axis parallel with paper for contrary rotation.Then, this linearly polarized light is had the following polarization plate that see through axle vertical with paper 116 absorptions.That is, within the light that penetrates from backlight 117, those not the light by slit 110 after the lower surface place of Transflective film 104 is reflected, absorbed fully by the following polarization plate 116 of infrabasal plate 101 substantially.

As mentioned above, in transflective liquid crystal display device 100, when transmission mode, owing to be reflected at Transflective film 104 places and the light by slit 110 is not all absorbed by the following polarization plate 116 of infrabasal plate 101 substantially, so only can be used in demonstration from the part of the light of backlight 117 ejaculations.Promptly, if polarization plate 116 turns back in the backlight 117 and is not absorbed by polarization plate 116 down under the supposition transmission, then the result just becomes the briliancy that improves backlight 117 for the light that originally penetrates from backlight 117 and this back light actual effect ground, thereby the brightness that can improve transmission mode.In other words, do not see through slit 110 and the light of reflection if in demonstration, can utilize once more at Transflective film 104 places, the brightness that then can improve transmission mode.But,, then can not realize this goal if with existing formation.

The utility model content

The utility model is for solving above-mentioned problem utility model, and purpose is to be provided in the transflective liquid crystal display device, has particularly improved the good liquid crystal indicator of watching property of the brightness that shows when transmission mode.In addition, the purpose of this utility model also is to provide the electronic equipment that possesses the above-mentioned liquid crystal indicator with good watching property.

To achieve these goals, liquid crystal indicator of the present utility model, be a kind of have liquid crystal layer seize on both sides by the arms in toward each other the configuration upper substrate and the liquid crystal indicator of the liquid crystal layer between the infrabasal plate, it is characterized in that: in inner face one side of above-mentioned infrabasal plate, begin to set gradually a plurality of uveal color filter layer with the pigment that contains different colors from substrate one side, with the part in the circularly polarized light that makes it to reflect sense of rotation with regulation, see through the Transflective layer of the cholesteryl liquid crystal layer of a part, setting is gone into injection device and is gone into injection device from the infrabasal plate one side elliptically polarized light of above-mentioned infrabasal plate one side incident elliptically polarized light from the upper substrate one side elliptically polarized light of above-mentioned upper substrate one side incident elliptically polarized light for above-mentioned liquid crystal layer, simultaneously, above-mentioned liquid crystal layer, be to select electric field to apply state, non-selection electric field applies under either party state in the state, make reversal of poles into the elliptically polarized light that shines, in the opposing party's state, then do not change the liquid crystal layer of polarity, reflected waveband at least a portion of the above-mentioned cholesteryl liquid crystal layer of uveal transmission wave band of each of above-mentioned color filter layer and the position corresponding with above-mentioned each uvea is piled up.

Cholesteryl liquid crystal, the screw pitch with wavelength and liquid crystal molecule equate and the so-called selection reflectivity of the circularly polarized light of the reflection sense of rotation identical with the coiling direction of spiral optionally.Even if those equate with the screw pitch of liquid crystal molecule that with the light and the wavelength of the unequal wavelength of screw pitch of liquid crystal molecule the circularly polarized light that has opposite sense of rotation with the coiling direction of spiral will be through cholesteryl liquid crystal conversely speaking.In addition, the cholesteryl liquid crystal layer that in the utility model, uses, also have the reflection of a circularly polarized light part, the part that make the wavelength sense of rotation equal and identical with the coiling direction of spiral with the screw pitch of liquid crystal molecule and see through rather than 100% function that sees through, this point is a feature of the present utility model.By means of above effect, this cholesteryl liquid crystal layer plays a part the Transflective layer.

Discoveries such as the utility model people: in reflective LCD device, under the situation of using the reflection horizon that constitutes by the cholesteryl liquid crystal that is proposed in the last few years, if the polarized state of light that incides on the liquid crystal cells is an elliptically polarized light, if apply, make the reversal of poles of elliptic polarization light state establish liquid crystal mode like that under any situation when non-selection electric field applies adding toward the selection electric field of liquid crystal layer, display mode is become be same pattern, saying from displaying principle just can be so that not deepening of transmission mode.In addition, also find: when transmission shows at the light that reflexes to infrabasal plate one side by means of the selection reflection of cholesteryl liquid crystal, even if the formation of outside one side of infrabasal plate work become with have identical state now under also can utilize again.Be conceived to these points, just reach to having proposed formation of the present utility model.Below, the displaying principle of liquid crystal indicator of the present utility model is described and utilizes reason again with Fig. 3 at the light of Transflective layer place reflection.

Fig. 3 is the key diagram that is used for illustrating the displaying principle of liquid crystal indicator of the present utility model.

Employing is seized liquid crystal layer 3 on both sides by the arms between upper substrate 1 that is made of the pair of light-transmissive substrate and infrabasal plate 2 and is constituted liquid crystal cells 4.Inner face one side at infrabasal plate 2 sets gradually color filter layer 6 (the following pigment color filter layer that also is called) with the uvea 5 (for example the uvea as red (R) describes in Fig. 3) that contains pigment and the Transflective layer 7 that is made of cholesteryl liquid crystal layer 8.Cholesteryl liquid crystal layer 8, be to make the part reflection in the circularly polarized light of sense of rotation of wave band (look) with regulation, regulation, the liquid crystal layer of a part of transmission, in this explanation, for example, be in redness right-circularly polarized light (below, also be called right-circularly polarized light) within make 80% reflection, make the liquid crystal layer of 20% transmission.The transmission wave band of the uvea 5 of pigment color filter layer 6 and the position reflected waveband of cholesteryl liquid crystal layer 8 thereon carry out overlapping, in this case, make configuration on the red light transmissive uvea 5 make it to select the cholesteryl liquid crystal layer 8 of reflection red light.

In addition, liquid crystal indicator of the present utility model, setting is gone into injection device for liquid crystal layer 3 from the upper substrate side elliptically polarized light of upper substrate 1 one side incident elliptically polarized lights, in Fig. 3, the last polarization plate 9 that sees through the linearly polarized light of a direction constitutes upper substrates one side elliptically polarized light with last 1/4 wavelength plate 10 that makes the linearly polarized light that has seen through polarization plate 9 on this be transformed into circularly polarized light and goes into injection device.In addition, in Fig. 3, also be provided with for liquid crystal layer 3 and go into injection device from the infrabasal plate side elliptically polarized light of infrabasal plate 2 one side incident elliptically polarized lights, same with upper substrate 1 one sides, following polarization plate 11 and following 1/4 wavelength plate 12 constitute the infrabasal plate elliptically polarized lights and go into injection device.Here, regulation upper substrate one side and infrabasal plate one side all make the axle that sees through of polarization plate 9,11 become and be the parallel direction of the paper of Fig. 3, under the linearly polarized light of this direction incides situation on 1/4 wavelength plate 10,12, penetrate right-circularly polarized light.

Liquid crystal layer 3 is to make the liquid crystal layer that reverses into the polarity (sense of rotation) of the circularly polarized light that shines by means of having or not of selecting that electric field applies, for example, when non-selection voltage applies (during liquid crystal OFF), liquid crystal molecule 13 just becomes the liquid crystal molecule for the phase differential that has λ/2 (λ is the incident light wavelength) under the state of lying down, therefore, the right-circularly polarized light of going into to shine is varied to left circularly polarized light after transflective liquid crystal layer 3, left circularly polarized light then is transformed into right-circularly polarized light.On the other hand, when selecting voltage to apply (during liquid crystal ON), phase differential disappears under liquid crystal molecule state on one's feet, and the polarity of circularly polarized light (sense of rotation) is constant.

In liquid crystal indicator shown in Figure 3, carrying out (left end of Fig. 3) under the situation about obviously showing of reflective-mode, the light of going into to shine from the outside of upper substrate 1, become to having the linearly polarized light of the polarizing axis parallel by means of the last polarization plate 9 that sees through on the upper substrate 1 with paper, then, be right-circularly polarized light by means of becoming through last 1/4 wavelength plate 10.At this moment, if make liquid crystal become state in advance for ON, because the sense of rotation of circularly polarized light is constant as mentioned above, so see through liquid crystal layer 3 arrival Transflective layers 7 and also will keep the original state of right-circularly polarized light constant even if incide under the situation on the liquid crystal layer 3 this light at right-circularly polarized light.

Here, big difference between the existing Transflective layer of use metal film etc. and the Transflective layer of the present utility model of use cholesteryl liquid crystal, be so a bit: with respect under the situation of the Transflective layer that constitutes by metal film, at reflex time, the sense of rotation of circularly polarized light becomes on the contrary, after the right-circularly polarized light reflection, just become in other words and be left circularly polarized light, and under the situation of the Transflective layer that uses cholesteryl liquid crystal, the sense of rotation of circularly polarized light is constant, and that is to say is that the right-circularly polarized light reflection also keeps the original state of right-circularly polarized light constant.Therefore, the result just become for the right-circularly polarized light of redness 80% after Transflective layer 7 place on the infrabasal plate 2 reflections, advance through liquid crystal layer 3 to upper substrate 1 once more.At this moment because liquid crystal also is the ON state, so though polarization state still keeps the original state of right-circularly polarized light constant, but afterwards owing to seeing through last 1/4 wavelength plate 10, be varied to linearly polarized light with polarizing axis parallel with paper, because this linearly polarized light can see through last polarization plate 9, so will turn back to outside (beholder's one side), liquid crystal indicator carries out bright (redness) and shows.

Otherwise, carrying out under the situation (several the 2nd) that showing slinkingly of reflective-mode show from the right of Fig. 3, when making liquid crystal become to the OFF state, because liquid crystal layer 3 has the phase differential of λ/2, so after having seen through liquid crystal layer 3, just becoming, the right-circularly polarized light of going into to shine from upper substrate 1 one sides is left circularly polarized light.In Fig. 3, the cholesteryl liquid crystal layer 8 that constitutes Transflective layer 7 only is the liquid crystal layer of the part of reflection right-circularly polarized light after all, so left circularly polarized light will be through Transflective layer 7.Then, by means of seeing through 1/4 wavelength plate 12 down, be varied to linearly polarized light with polarizing axis vertical with paper, this linearly polarized light, owing to be absorbed at following polarization plate 11 places, thus can returning to external (beholder's one side), and liquid crystal indicator shows slinkingly and shows.

On the other hand, carrying out under the situation of the demonstration under the transmission mode, for example will be from lateral liquid crystal cells 4 incidents of infrabasal plate 2 from the light of ejaculations such as backlight, this light becomes the light that shows for participating in.Here, carrying out under the situation that showing slinkingly of transmission mode show (right-hand member of Fig. 3), the result just becomes effect same substantially when upper substrate 1 one sides from infrabasal plate 2 one side direction and produce with reflective-mode.In other words, in Fig. 3, owing to also possess and same following polarization plate 11 of upper substrate 1 and 1/4 wavelength plate 12 down, so from infrabasal plate 2 one side direction liquid crystal layers 3 incident right-circularly polarized lights, it is 20% through Transflective layer 7 in infrabasal plate 2 one sides.Here, if liquid crystal is the OFF state, be left circularly polarized light owing to becoming in that moment that arrives upper substrate 1 one sides, see through last 1/4 wavelength plate 10, be varied to linearly polarized light with polarizing axis vertical with paper, because this linearly polarized light is absorbed at last polarization plate 9 places, so can not penetrate to outside (beholder's one side), liquid crystal indicator shows slinkingly and shows.

Carrying out under the situation about obviously showing of transmission mode (Fig. 3 from the left side several the 2nd), light from infrabasal plate 2 one side incidents, become to having the linearly polarized light of the polarizing axis parallel by means of polarization plate 11 under seeing through with paper, then, have benefited from seeing through 1/4 wavelength plate 12 down and become uvea 5, penetrate after becoming right-circularly polarized light for redness for transmission pigment color filter layer 6 behind the right-circularly polarized light.Penetrate 20% in light at this, the Transflective layer 7 that can transmission constitutes by cholesteryl liquid crystal, if liquid crystal is the ON state, then 20% right-circularly polarized light will be kept its polarization state original state and arrive upper substrate 1 one sides unchangeably.Then, right-circularly polarized light is varied to the linearly polarized light with polarizing axis parallel with paper owing to seeing through last 1/4 wavelength plate 10, because this linearly polarized light can see through last polarization plate 9, so with returning to external (beholder's one side), liquid crystal indicator carries out bright (redness) and shows.

On the other hand, under the situation about obviously showing of transmission mode, the result will become in transmission within the right-circularly polarized light of redness of uvea 5 of pigment color filter layer 6,80% constitute by cholesteryl liquid crystal Transflective layer 7 place towards lateral reflection down.At this moment, as mentioned above, because cholesteryl liquid crystal has the character of the sense of rotation that does not change the reflection circle polarized light, so reflected light is a right-circularly polarized light., afterwards, just become behind 1/4 wavelength plate 12 under the right-hand circular polarization light transmission to having the linearly polarized light of the polarizing axis parallel with paper, this linearly polarized light can see through the following polarization plate 11 with polarizing axis parallel with paper for this reason.So, when the linearly polarized light that has with the identical polarizing axis of the axis of homology of following polarization plate 11, when infrabasal plate 2 one sides penetrated, this light for example had benefited from locating to be reflected and importing to liquid crystal cells 4 one sides once more at the reflecting plate that possesses backlight etc., can utilize in demonstration again.

In addition, though illustrated last, when showing slinkingly of transmission mode shown transmission pigment color filter layer 6 uvea 5 right-circularly polarized light the 80% Transflective layer 7 place reflection that is also constituting by cholesteryl liquid crystal and penetrate from the outside of infrabasal plate 2 one side direction liquid crystal cells 4 after be directed to liquid crystal cells 4 once more, but this light all is absorbed at last polarization plate 9 places in any case, thus for show slinkingly show the special obstruction of nothing.In addition, when carrying out obviously the showing of reflective-mode since from the right-circularly polarized light of going into to shine 20% with transmission Transflective layer 7, so formerly after the outside ejaculation of infrabasal plate 2 one side direction liquid crystal cells 4, import liquid crystal cells 4 once more.This light is owing to participating in demonstration, so even if the demonstration of reflective-mode also can be kept bright demonstration.

As mentioned above, in liquid crystal indicator of the present utility model, when reflection and transmission, can use same display mode, particularly be conceived under the situation about obviously showing of transmission mode, transmission the major part of light of the Transflective layer that constitutes by cholesteryl liquid crystal will participate in showing and the part that can not resemble the existing transflective liquid crystal display device light of going into to shine from infrabasal plate one side is absorbed at last polarization plate.On the other hand, the light in the Transflective layer place reflection that is made of cholesteryl liquid crystal then can utilize in demonstration again.Certainly, the cholesteryl liquid crystal place that uses in last explanation is reflected into 80%, is transmitted as only example of 20% this ratio, and how the ratio of reflection and transmission changes can.But, no matter be which type of ratio, can maximally utilise the effect of the circularly polarized light of the Transflective layer that transmission is made of cholesteryl liquid crystal, the effect that can utilize again in demonstration with the circularly polarized light that reflects at Transflective layer place complements each other, in the brightness that can keep the reflection demonstration, can improve the brightness that transmission shows highlyer, thereby can realize the liquid crystal indicator of the Transflective that watching property is good than prior art.

In addition, in last explanation, though all the light that imports into from upper substrate one side, infrabasal plate one side is decided to be ' (dextrorotation) circularly polarized light ' as desirable form, but for the action that realizes said liquid crystal indicator of the present utility model be not must be perfect circularly polarized light can not, on wide significance, say it also can is ' elliptically polarized light '.

In above-mentioned liquid crystal indicator of the present utility model, it is desirable to possess the lighting device that makes light incident for liquid crystal cells from infrabasal plate one side.

In liquid crystal indicator of the present utility model, for transmissive display mode being done to become must with certain install from infrabasal plate one side incident elliptically polarized light identical with reflection display mode.For this reason, though adopt which type of device all right, it is the way of so-called backlight from the lighting device of infrabasal plate one side incident light that employing possesses for liquid crystal cells, can easily realize from the formation of infrabasal plate one side incident elliptically polarized light.

Go into the concrete scheme that injection device and above-mentioned infrabasal plate side elliptically polarized light are gone into injection device as above-mentioned upper substrate side elliptically polarized light, can constitute by the device that has the polarization plate that sees through a directional ray polarized light and will be transformed to the polarizer of elliptically polarized light through the linearly polarized light of this polarization plate.

Have benefited from these 2 optical components are separately positioned on upper substrate one side and infrabasal plate one side, just can be easily be transformed into elliptically polarized light, can become to being suitable for liquid crystal indicator of the present utility model the outer light of sunshine, illumination light etc. with from the illumination light of backlight.

As above-mentioned polarizer,, it is desirable to use 1/4 wavelength plate though suitable the selection has the polarizer of phase differential arbitrarily.

Under the situation of using 1/4 wavelength plate, owing to can be transformed into the linearly polarized light that penetrates from polarization plate at the elliptically polarized light of wide significance circularly polarized light particularly, so can improve the utilization factor of light the most highly, can realize the liquid crystal indicator of more bright demonstration.But, the polarizer that is arranged on upper substrate one side is also had under the situation of function of colorimetric compensation, just can select to have the polarizer of phase differential arbitrarily and be not limited to 1/4 wavelength plate.

Above-mentioned cholesteryl liquid crystal layer, be the liquid crystal layer that works as reflective color filter, can use the reflected waveband of above-mentioned cholesteryl liquid crystal layer in the zone of above-mentioned each regulation and each uveal transmission wave band at least a portion of above-mentioned color filter layer to carry out overlapping liquid crystal layer the different coloured light of the corresponding wavelength of the reflection of the regioselectivity of each regulation ground and the screw pitch of liquid crystal molecule.Change a kind of saying, can use in the zone of each afore mentioned rules liquid crystal layer from the solid colour of the catoptrical color of above-mentioned cholesteryl liquid crystal layer and the transmitted light in each uvea of above-mentioned color filter layer.

Cholesteryl liquid crystal layer in the liquid crystal indicator of the present utility model, can adopt the different a plurality of layers of the screw pitch that makes liquid crystal molecule to carry out the ways of lamination, the reflection horizon that makes it to contain as reflection the circularly polarized light of all wave bands is that so-called white reflecting plate plays a role.In addition, make the screw pitch that in the zone of each regulation, changes liquid crystal molecule if do to become, and the light of the reflection wavelength corresponding with this regional screw pitch optionally, then just can make each zone play a part for example to distinguish the reflection of light formula color filter of reflect red (R), green (G), indigo plant (B) look.Under situation about working, make the demonstration of the color that each some color in the viewing area is all different become possibility owing to above-mentioned displaying principle as reflective color filter.In this case, the cholesteryl liquid crystal layer mainly plays a part the color filter that reflection shows usefulness, and the color filter layer that contains pigment mainly plays the color filter effect that transmission shows usefulness.

In addition, also can make to become such formation: between infrabasal plate and color filter layer, on the zone of above-mentioned each regulation, the cholesteryl liquid crystal layer of a part of the coloured light of the wave band beyond the reflected waveband be reflected in the cholesteryl liquid crystal layer that constitutes the Transflective layer at least is set also.In other words, also can constitute also between infrabasal plate and color filter layer, on the zone of above-mentioned each regulation, the color that reflection and transmitted light in each uvea of color filter layer be set be in the complementary colors relation color coloured light be the cholesteryl liquid crystal layer of a part at least.

Use Fig. 4 that effect, the effect of the cholesteryl liquid crystal layer of new affix are described here.

The difference of Fig. 4 and Fig. 3 is: the downside of the pigment color filter layer on infrabasal plate, the affix selection is reflected in the coloured light of the reflected waveband wave band in addition of the cholesteryl liquid crystal layer that constitutes the Transflective layer, in other words, the color of reflection and transmitted light in each uvea of color filter layer is in the cholesteryl liquid crystal layer of coloured light of the relation of complementary colors.In Fig. 4, specifically, color with respect to the transmitted light of the reflected light of the cholesteryl liquid crystal layer that constitutes the Transflective layer and pigment color filter layer be red (R), makes the use of getting up of this 2 layer laminate of cholesteryl liquid crystal layer of the light of selecting reflection green (G) and blueness (B) respectively.In addition, in the following description, only the change that forms owing to new affix cholesteryl liquid crystal layer is partly described, then omitted with the explanation of common those displaying principles of Fig. 3 basically.

For reflective-mode, the circularly polarized light of redness of the uvea 5 of infrabasal plate 2 one side transmission pigment color filter layers 6 from upper substrate 1 one side direction can transmission be selected the cholesteryl liquid crystal layer 14 of reflects green and is selected the cholesteryl liquid crystal layer 15 of reflect blue light.In addition, though exist in the selected reflection respectively of cholesteryl liquid crystal layer 14,15 place of downside, green light and the blue light that advances to upper substrate 1 one sides still is absorbed at uvea 5 places of the redness of pigment color filter layer 6 owing to these light, so can be to liquid crystal layer 3 one side outgoing once more.Therefore, under the situation of reflective-mode, on displaying principle, almost there is not any variation with last explanation.

Secondly, for transmission mode, effect and effect for cholesteryl liquid crystal layer 14,15 that downside is described, particularly when being conceived to obviously to show the situation of (from the 2nd of the left-hand digit of Fig. 4), become light under seeing through behind 1/4 wavelength plate 12 for right-circularly polarized light, at the right-circularly polarized light of cholesteryl liquid crystal layer 15 place's reflection blue, the right-circularly polarized light of reflection green then at cholesteryl liquid crystal layer 14 place.With respect to this, red right-hand circular polarization transmittance cholesteryl liquid crystal layer 14,15, also transmission after the uvea 5 of redness of pigment color filter layer 6,80% being reflected wherein at Transflective layer 7 place.

Under the situation of Fig. 3 of the cholesteryl liquid crystal layer that does not have downside, right-circularly polarized light from following 1/4 wavelength plate, 12 1 side incidents, because all to uvea 5 incidents of the redness of pigment color filter layer 6, green light composition in the incident light and blue light composition are absorbed at uvea 5 places of redness, and these compositions can not turn back to after this to utilize in the circulation again and go.With respect to this, under the situation of the Fig. 4 that is provided with downside cholesteryl liquid crystal layer 14,15, since from the right-circularly polarized light of down 1/4 wavelength plate, 12 incidents before uvea 5 incidents of the redness of pigment color filter layer 6 earlier to 14,15 incident of cholesteryl liquid crystal layer, green light composition and blue light composition so be reflected before it in right-circularly polarized light can not be absorbed at uvea 5 places of redness, with from the reflex components in the red light composition, return and utilize circulation again from 7 reflection of Transflective layer.Consequently, can obtain more bright transmission and show as all improving the efficient of utilizing again.

Electronic equipment of the present utility model is characterized in that possessing above-mentioned liquid crystal indicator of the present utility model.

If adopt this formation, then can provide the demonstration that possesses when transmission mode also bright, the electronic equipment of the liquid-crystal display section that watching property is good.

The simple declaration of accompanying drawing

Fig. 1 shows the cross-section structure of the liquid crystal indicator of embodiment 1 of the present utility model.

Fig. 1 shows the cross-section structure of the liquid crystal indicator of embodiment 2 of the present utility model.

Fig. 3 is the mode chart that is used for illustrating with respect to the displaying principle of the liquid crystal indicator of above-mentioned embodiment 1.

Fig. 4 is the mode chart that is used for illustrating with respect to the displaying principle of the liquid crystal indicator of above-mentioned embodiment 2.

The Transflective that Fig. 5 shows the color filter of embodiment 3 distributes.

Fig. 6 shows the cross-section structure of the liquid crystal indicator of embodiment 4.

The Transflective that Fig. 7 shows the color filter of embodiment 5 distributes.

The Transflective that Fig. 8 shows the color filter of embodiment 6 distributes.

Fig. 9 shows the cross-section structure of the liquid crystal indicator of embodiment 7.

The oblique view of Figure 10 shows an example of electronic equipment of the present utility model.

The oblique view of Figure 11 shows another example of electronic equipment of the present utility model.

The oblique view of Figure 12 shows another example of electronic equipment of the present utility model.

The sectional view of Figure 13 has illustrated an example of existing liquid crystal indicator.

The explanation of symbol

1,24 upper substrate; 2,23 infrabasal plates; 3,26 liquid crystal layers; 4,21 liquid crystal cells; 5,31r, 31g, 31b uvea; 6,32 pigment color filter layers; 7,35 Transflective layers; 8,34r, 34g, 34b, 51,52r, 52g, 52b cholesteryl liquid crystal layer; Polarization plate on 9,43 (upper substrate side elliptically polarized light is gone into injection device); Polarizer on 10,42 (upper substrate side elliptically polarized light is gone into injection device); 11,45 times polarization plates (infrabasal plate side elliptically polarized light is gone into injection device); 14,15 cholesteryl liquid crystal layers; 20,50 liquid crystal indicators; 22 backlights (lighting device) are specifically executed scheme

[embodiment 1]

Below, referring to Fig. 1 embodiment 1 of the present utility model is described.

Fig. 1 shows the cross-section structure of the liquid crystal indicator of the present embodiment, and the present embodiment is an example of Transflective color liquid crystal display arrangement.In addition, in following accompanying drawing,, the thickness of each inscape and the ratio of size etc. are changed aptly in order to be easy to watch drawing.

The liquid crystal indicator 20 of the present embodiment as shown in Figure 1, possesses liquid crystal cells 21 and backlight 22 (lighting device).Liquid crystal cells 21 disposes infrabasal plate 23 and upper substrate 24 in opposite directions, seizes on both sides by the arms between this upper substrate 24 and infrabasal plate 23 by phase differential being set at the liquid crystal layer 26 that the STN of λ/2 for example (supertwist is to row) liquid crystal etc. constitutes.At the back of liquid crystal cells 21 side (outside one side of infrabasal plate 23) configuration backlight 22.Backlight 22 possesses light source 27, light guide plate 28 and the reflecting plate 29 etc. by formations such as LED (light emitting diode).

Inner face one side of the infrabasal plate 23 that constitutes in transmission material by glass or plastics etc., formation has uvea 31r, the 31g of the pigment of the different color that for example contains R, G, B, the pigment colour filter 32 of 31b, form thereon by select by lining overlay 33 that cholesteryl liquid crystal layer 34r, 34g, the 34b of the coloured light of reflection R, G, these different colors of B constitute Transflective layer 35.Cholesteryl liquid crystal layer 34r, 34g, 34b reflect the part in the circularly polarized light of those sense of rotation with regulation in each coloured light, a transmission part specifically, for example makes the reflection of 80% within the right-circularly polarized light, makes 20% transmission.The reflection and the ratio of transmission can be set at reflection: in the scope of transmission=8: 2～about 1: 9, as the manufacture method of this setting, the thickness of controlling cholesteryl liquid crystal layer 34r, 34g, 34b is exactly one of method.

Thereon cholesteryl liquid crystal layer 34r of each uvea 31r of pigment color filter layer 32, the transmission wave band of 31g, 31b and position, the reflected waveband of 34g, 34b are piled up substantially, at this moment, at the cholesteryl liquid crystal layer 34r that makes selection of configuration reflection red light on the red light transmissive uvea 31r, at the cholesteryl liquid crystal layer 34g that makes selection of configuration reflects green on the green light transmissive uvea 31g, at the cholesteryl liquid crystal layer 34b that makes selection of configuration reflect blue light on the blue light transmissive uvea 31b.Cholesteryl liquid crystal layer 34r, 34g, 34b select the light of the reflection wavelength consistent with the screw pitch of liquid crystal molecule.In addition, for example, the uitraviolet intensity when adopting change to make the cholesteryl liquid crystal sclerosis or the way of temperature, control screw pitch partly,, just can obtain selecting the liquid crystal layer of reflect blue light if screw pitch is controlled to about 450nm, if control to about 550nm, then can obtain selecting the liquid crystal layer of reflects green,, wholely work as reflective color filter if be controlled to be 650nm then can obtain selecting the liquid crystal layer of reflection red light.

Color filter with respect to cholesteryl liquid crystal layer 34r, 34g, the 34b color when being used for forming reflection and showing works, and the color filter of 32 of the pigment color filter layers color when being used for forming transmission and showing works.The graphics shape of the planarity of each color of uvea 31r, the 31g of these pigment color filter layers 32,31b and position cholesteryl liquid crystal layer 34r, 34g, 34b thereon, for example can adopt those as ribbon, inlay grid-like, Delta shape etc. and be the same shape of the known existing color filter of people.

Above the Transflective layer 35 of inner face one side of infrabasal plate 23, form the lower electrode 37 that the nesa coating by ITO etc. constitutes via lining overlay 36, form the alignment films 38 that the resin by polyimide etc. constitutes thereon.On the other hand,, also form the upper electrode 39 that the nesa coating by ITO etc. constitutes, form the alignment films 40 that the resin by polyimide etc. constitutes thereon in inner face one side of upper substrate 24.In the electrode that is made of these lower electrodes 37, upper electrode 39 constitutes, can adopt the active matrix mode of the on-off element that uses thin film transistor (TFT) (TFT), thin film diode (TFD) etc., any mode in the passive matrix mode.

In the outside of upper substrate 24 side, begin to set gradually upward polarizer 42 and last polarization plate 43 (constitute upper substrate one side elliptically polarized light by both party and go into injection device) from substrate one side.On the other hand, in the outside of infrabasal plate 23 side, begin to set gradually down polarizer 44 and following polarization plate 45 (constitute infrabasal plate one side elliptically polarized light by both party and go into injection device) from substrate one side.Polarizer 42,44 and polarization plate 43,45 on these, it is the circularly polarized light that has the sense of rotation of regulation for 26 incidents to liquid crystal layer, from the displaying principle of liquid crystal indicator of the present utility model, must be consistent substantially from the circularly polarized light of upper substrate 24 1 side incidents and sense of rotation from the circularly polarized light of infrabasal plate 23 incidents.For this reason, the direction that the direction that sees through axle of last polarization plate 43 and following polarization plate 45 all must be parallel with the paper among Fig. 1 is consistent substantially.But, particularly be arranged under the situation of function that the polarizer of also wanting to make upper substrate 24 1 sides has colorimetric compensation, can select to have the polarizer of phase differential arbitrarily and be not must be that 1/4 wavelength plate can not.

As for the displaying principle of the liquid crystal indicator 20 of above-mentioned formation, owing in ' utility model content ', explain, so here omitted.As mentioned above, if adopt the liquid crystal indicator 20 of the present embodiment, when reflection and transmission, can use same display mode, particularly be conceived under the situation about obviously showing of transmission mode, transmission the major part of light of the Transflective layer 35 that constitutes by cholesteryl liquid crystal layer 34r, 34g, 34b will participate in showing and the part that can not resemble the existing transflective liquid crystal display device light of going into to shine from infrabasal plate one side is absorbed at last polarization plate.On the other hand,, be not directed to the light of liquid crystal layer 26, then can in transmission shows, utilize again in the Transflective layer 35 place reflection that constitutes by cholesteryl liquid crystal layer 34r, 34g, 34b.As mentioned above, the effect of circularly polarized light of the Transflective layer 35 that constitutes by cholesteryl liquid crystal layer 34r, 34g, 34b that can maximally utilise transmission, the effect that can utilize again in demonstration with the circularly polarized light that reflects at Transflective layer 35 place complements each other, in the brightness that can keep the reflection demonstration, can improve the brightness that transmission shows highlyer, thereby can realize the liquid crystal indicator of the Transflective that watching property is good than prior art.

[embodiment 2]

Below, referring to Fig. 2 embodiment 2 of the present utility model is described.

Fig. 2 shows the cross-section structure of the liquid crystal indicator of the present embodiment.The basic comprising of the liquid crystal indicator of the present embodiment and embodiment 1 are same substantially, and difference only is also to add in the bottom of pigment color filter layer cholesteryl liquid crystal layer this point is arranged.Therefore, in Fig. 2, give same label and omit its detailed explanation for the inscape that those and Fig. 1 are common.

The liquid crystal indicator 50 of the present embodiment, as shown in Figure 2, the downside of the pigment color filter layer 32 on infrabasal plate 23, the additional coloured light that reflected waveband (each uvea 31r of pigment color filter layer 32, the transmission wave band of 31g, the 31b) wave band in addition of cholesteryl liquid crystal layer 34r that the reflection selected constitutes Transflective layer 35,34g, 34b is arranged, in other words, select the color of transmitted light of each uvea 31r, 31g, the 31b of reflection and pigment color filter layer 32 to be in the cholesteryl liquid crystal layer 51 of coloured light of the relation of complementary colors.

In Fig. 2, specifically the color at the transmitted light of the reflected light of the cholesteryl liquid crystal layer that constitutes Transflective layer 35 and pigment color filter layer 32 be the zone (34r of redness (R), 31r), lamination uses 2 layers of cholesteryl liquid crystal layer 52g of the light of selecting reflection green (G) and blue (B) look respectively, 52b, zone (34g at green (G), 31g), lamination uses 2 layers of cholesteryl liquid crystal layer 52b of the light of selecting blue (B) and red (R) look of reflection respectively, 52r, zone (34b at blue (B), 31b), lamination uses 2 layers of cholesteryl liquid crystal layer 52r of the light of selecting reflect red (R) and green (G) look respectively, 52g.As mentioned above, because as long as each uvea 31r of pigment color filter layer 32,31g, the relation that the color of the transmitted light of 31b and cholesteryl liquid crystal layer 51 all catoptrical color of selection are in complementary colors gets final product, so also lamination cholesteryl liquid crystal layer as described above 2 layers not, on the zone of red (R), only dispose 1 layer of cholesteryl liquid crystal layer of selecting the light of reflection cyan and replace, on the zone of green (G), only dispose 1 layer and select the wine-colored cholesteryl liquid crystal layer of reflection, on the zone of blue (B), only dispose 1 layer of cholesteryl liquid crystal layer of selecting the reflection sodium yellow.Also can make the multilayer of cholesteryl liquid crystal layer formation more than 3 layers of the relation of selecting reflection colour to be in complementary colors.

As for the displaying principle of the liquid crystal indicator 50 of above-mentioned formation, owing in ' utility model content ', explain, so here also omitted.As mentioned above, if adopt the liquid crystal indicator 50 of the present embodiment, since when transmission shows from the circularly polarized light that descends polarizer 44 1 side incidents at uvea 31r of all kinds to pigment color filter layer 32,31g, elder generation is to 51 incident of cholesteryl liquid crystal layer before the 31b incident, so within circularly polarized light, uvea 31r for pigment color filter layer 32,31g, the color of 31b is in the coloured light composition of complementary colors, can be at these uveas 31r, 31g, the 31b place is absorbed, but before this, at cholesteryl liquid crystal layer 52r, 52g, the 52b place is reflected, and returns and utilizes circulation again.Therefore, as the efficient of utilizing again that all can improve light, can obtain more bright transmission and show.

[embodiment 3]

Below referring to Fig. 5 embodiment 3 of the present utility model is described.

Near reflected waveband and the pigment color filter of cholesteryl liquid crystal layer 550nm that Fig. 5 shows the present embodiment distributes at the transmission wave band of 550nm.In other words, show the zone of green (G) look of the pigment of color filter.Here, though be limited to the explanation that green (G) is carried out, also be same for red (R) and blue (B).In directive wave section zone, the light of transmission wave band can be from backlight one side transmission.The basic comprising of the liquid crystal indicator of the present embodiment and embodiment 1 are same substantially, and difference only is that the reflected waveband of the cholesteryl liquid crystal layer on the pigment color filter layer becomes than the narrow this point of transmission wave band of pigment color filter layer.So-called here reflected waveband is narrower than transmission wave band, is defined as half the wavelength width (it is called half breadth) that is equivalent to reflectivity or transmissivity and comprises reflected waveband in the transmission wave band.Specifically in Fig. 5, because the half breadth of transmission wave band is from 500nm to 580nm, reflected waveband is from 520nm to 560nm, so be equivalent to embodiment 3.Therefore, structure and Fig. 1 are common, and its detailed description is omitted.

Owing to select the refractive index anisotropy Δ n of reflection wavelength width and cholesteryl liquid crystal layer to be in proportionate relationship, can adopt the way that forms Δ n for a short time to realize.

Can adopt the reflected waveband that makes cholesteryl liquid crystal layer 34r, 34g, 34b to become to the way littler and improve transmissivity than the transmission wave band of pigment color filter layer 32.

[embodiment 4]

Below, referring to Fig. 6 embodiment 4 of the present utility model is described.

Fig. 6 shows the cross-section structure of the liquid crystal indicator of the present embodiment.The basic comprising of the liquid crystal indicator of the present embodiment and embodiment 1 are same substantially, difference only is that the formation area of the cholesteryl liquid crystal layer on the pigment color filter layer forms forr a short time than the formation area of pigment color filter layer, and is formed with the layer this point through light betwixt.Therefore in Fig. 6, give same label and omit its detailed explanation for the common inscape of those and Fig. 1.

In this formation, on the pigment color filter layer, exist the zone that does not have the cholesteryl liquid crystal layer, and cover with the layer that makes light transmission.In this zone, the illumination light from backlight one side can not reflected by the cholesteryl liquid crystal layer to liquid crystal layer incident.Adopt the way of making to become such structure, can improve transmissivity.

[embodiment 5]

Below, referring to Fig. 7 embodiment 5 of the present utility model is described.

Fig. 7 shows near the 550nm of cholesteryl liquid crystal layer of the present embodiment reflected waveband and the 550nm transmission wave band of pigment color filter distributes.The basic comprising of the liquid crystal indicator of the present embodiment and embodiment 1 are same substantially, and difference only is that the cholesteryl liquid crystal layer is made into and makes and reflect and the transmission this point in a certain certain wave strong point.Therefore, structure and Fig. 1 are common, and its detailed explanation is omitted.

In this constituted, the cholesteryl liquid crystal layer was made into and makes a certain certain wavelengths place reflect and transmission.As one of method that realizes this purpose, can adopt and be made into the way realization that the feasible cholesteryl liquid crystal layer comparison bed thickness that reflects fully for specific wavelength forms for a short time.This structure increases from the light of illumination light transmission in cholesteric alcohol layer of backlight one side, can expect the demonstration that becomes clear.

[embodiment 6]

Below, referring to Fig. 8 embodiment 6 of the present utility model is described.

Fig. 8 shows near the 550nm of cholesteryl liquid crystal layer of the present embodiment reflected waveband and the 550nm transmission wave band of pigment color filter distributes.The basic comprising of the liquid crystal indicator of the present embodiment and embodiment 2 are same substantially, difference only is the reflected waveband of the cholesteryl liquid crystal layer between infrabasal plate and the pigment color filter layer, than the also narrow this point of complementary colors wave band of each uveal transmission peak wavelength of pigment color filter layer.Therefore, structure and Fig. 2 are common, and its detailed explanation is omitted.

Under the situation of this formation, owing to form the reflected waveband of the cholesteryl liquid crystal layer between infrabasal plate and the pigment color filter layer also narrowlyer than the complementary colors wave band of each uveal transmission peak wavelength of pigment color filter layer, so can make light beyond green (G) look from backlight one side return backlight one side and be not absorbed, circulate so can return to utilize again at pigment color filter place.In addition, can also prevent to reflect colour mixture in the demonstration.Therefore as the efficient of utilizing again that all can improve light, can obtain more bright transmission and show.Though the explanation here is only limited near green (G) wavelength, near red (R), blue (B) wavelength, also be same.

[embodiment 7]

Below, referring to Fig. 9 embodiment 7 of the present utility model is described.

Fig. 9 shows the cross-section structure of the liquid crystal indicator of the present embodiment.The basic comprising of the liquid crystal indicator of the present embodiment and embodiment 2 are same substantially, and difference only is that the formation area of the cholesteryl liquid crystal layer between infrabasal plate and pigment color filter layer forms than the big this point of each uveal formation area of pigment color filter layer.Therefore in Fig. 9, give same label and omit its detailed explanation for the common inscape of those and Fig. 2.

In this formation, because the formation area of the cholesteryl liquid crystal layer between infrabasal plate and pigment color filter layer is bigger than each uveal formation area of pigment color filter layer, so can make light from backlight one side return backlight one side and be not absorbed, circulate so can return to utilize again at pigment color filter place.Therefore as the efficient of utilizing again that all can improve light, can obtain more bright transmission and show.

[electronic equipment]

Example to the electronic equipment of the liquid crystal indicator that possesses above-mentioned embodiment describes.

The oblique view of Figure 10 shows an example of mobile phone.In Figure 10, label 1000 expression mobile phone main bodys, the liquid-crystal display section of above-mentioned liquid crystal indicator is used in label 1001 expressions.

The oblique view of Figure 11 shows an example of watch style electronic equipment.In Figure 11, label 1100 expression wrist-watch main bodys, the liquid-crystal display section of above-mentioned liquid crystal indicator is used in label 1101 expressions.

The oblique view of Figure 12 shows an example of the portable information processing terminal of word processor, personal computer etc.In Figure 12, label 1200 is signal conditioning packages, and label 1202 is importations of keyboard etc., and label 1204 is signal conditioning package main bodys, and the liquid-crystal display section of above-mentioned liquid crystal indicator is used in label 1206 expressions.

Figure 10 is to electronic equipment shown in Figure 12, owing to possess the liquid-crystal display section of the liquid crystal indicator that uses above-mentioned embodiment, even if so the transmission mode demonstration that also can obtain becoming clear, thereby can realize possessing the electronic equipment of the liquid-crystal display section that watching property is all good in all environments for use.

In addition, technical scope of the present utility model is not limited to above-mentioned embodiment, can add all changes in the scope that does not deviate from aim of the present utility model.For example, in the above-described embodiment, though what go into that injection device uses as elliptically polarized light is polarization plate and 1/4 wavelength plate, so long as for liquid crystal layer can the incident elliptically polarized light member, also can use other optical component.

In addition, in the utility model, though it is desirable to make circularly polarized light to liquid crystal layer incident in demonstration, to utilize, be not leave no choice but be defined in circularly polarized light can not, as long as allow the utilization ratio of light how much to reduce, also can use elliptically polarized light.In addition, in the above-described embodiment, though what enumerate is for each zone, the catoptrical color of the cholesteryl liquid crystal layer of the color of each uveal transmitted light of pigment color filter layer and the position corresponding with above-mentioned each uvea is homochromy, in other words, the example that the reflected waveband of the cholesteryl liquid crystal layer of uveal transmission wave band of each of pigment color filter layer and the position corresponding with each uvea is piled up substantially, but, for this point also is that as long as allow the utilization ratio of light how much to reduce at least a portion of above-mentioned 2 wave bands is piled up and gets final product.

As mentioned above, if adopt the utility model then when reflex time and transmission, can use same display mode, particularly in transmission mode, passed through by the cholesteryl liquid crystal layer constitute the major part of light of Transflective layer will participate in showing and the part that can not resemble the existing transflective liquid crystal display device light of going into to shine from infrabasal plate one side is absorbed at last polarization plate.On the other hand, reflect at the Transflective layer place that is made of the cholesteryl liquid crystal layer, the light from infrabasal plate one side that does not import in the liquid crystal layer then can utilize in transmission shows again.So, the ratio prior art of the brightness raising that just in the brightness of keeping the reflection demonstration transmission is shown is also high, can realize the liquid crystal indicator of the Transflective that watching property is good.

Claims (16)

1. liquid crystal indicator, be to have liquid crystal layer is seized on both sides by the arms in the upper substrate of configuration toward each other and the liquid crystal indicator of the liquid crystal cells between the infrabasal plate, it is characterized in that: in inner face one side of above-mentioned infrabasal plate, begin to be provided with successively from substrate one side and possess a plurality of uveal color filter layer that contains color dye, with a part that has in the elliptically polarized light that makes it to reflect sense of rotation with regulation, the Transflective layer of the cholesteryl liquid crystal layer of a transmission part, be provided with for above-mentioned liquid crystal layer to go into injection device and go into injection device from the infrabasal plate one side elliptically polarized light of above-mentioned infrabasal plate one side incident elliptically polarized light from the upper substrate one side elliptically polarized light of above-mentioned upper substrate one side incident elliptically polarized light, simultaneously, above-mentioned liquid crystal layer, be to select electric field to apply state, non-selection electric field applies under either party state in the state, make reversal of poles into the elliptically polarized light that shines, under the opposing party's state, then do not change the liquid crystal layer of polarity, reflected waveband at least a portion of the above-mentioned cholesteryl liquid crystal layer of uveal transmission wave band of each of above-mentioned color filter layer and the position corresponding with above-mentioned each uvea is piled up.

2. liquid crystal indicator according to claim 1 is characterized in that: possess from the lighting device of above-mentioned infrabasal plate one side to above-mentioned liquid crystal cells incident light.

3. liquid crystal indicator according to claim 2, it is characterized in that: above-mentioned upper substrate one side elliptically polarized light goes into injection device and above-mentioned infrabasal plate one side elliptically polarized light is gone into injection device, have a direction of transmission linearly polarized light polarization plate and make the linearly polarized light that has seen through this polarization plate be transformed into the polarizer of elliptically polarized light.

4. liquid crystal indicator according to claim 3 is characterized in that: above-mentioned polarizer is 1/4 wavelength plate.

5. liquid crystal indicator according to claim 1, it is characterized in that: above-mentioned cholesteryl liquid crystal layer, in the zone of each regulation, all play a part to select the reflective color filter of the different coloured light of the corresponding wavelength of the reflection and the screw pitch of liquid crystal molecule, on the zone of above-mentioned each regulation, the uveal transmission wave band of each of the reflected waveband of above-mentioned cholesteryl liquid crystal layer and above-mentioned color filter layer at least a portion is piled up.

6. according to any one the described liquid crystal indicator in the claim 1 to 5, it is characterized in that: above-mentioned cholesteryl liquid crystal layer forms on the zone of afore mentioned rules, and the area on this formed plane is littler than the area on the formed plane of above-mentioned color filter layer.

7. according to any one the described liquid crystal indicator in the claim 1 to 5, it is characterized in that: the reflected waveband of above-mentioned cholesteryl liquid crystal layer is narrower than each uveal transmission wave band of above-mentioned color filter.

8. according to any one the described liquid crystal indicator in the claim 1 to 5, it is characterized in that: above-mentioned cholesteryl liquid crystal layer has reflection and transmission at a certain wavelength place.

9. liquid crystal indicator according to claim 1, it is characterized in that: above-mentioned cholesteryl liquid crystal layer, in the zone of each regulation, all play a part to select the reflective color filter of the different coloured light of the corresponding wavelength of the reflection and the screw pitch of liquid crystal molecule, in the zone of above-mentioned each regulation, from the solid colour of each uveal transmitted light of the catoptrical color of above-mentioned cholesteryl liquid crystal layer and above-mentioned color filter layer.

10. according to claim 1,5 or 9 described liquid crystal indicators, it is characterized in that: above-mentioned cholesteryl liquid crystal layer is provided with in the zone of above-mentioned each regulation, and covers with the light transmission layer between each uvea.

11. according to claim 5 or 9 described liquid crystal indicators, it is characterized in that: also between above-mentioned infrabasal plate and above-mentioned color filter layer, in the zone of above-mentioned each regulation, be provided with the cholesteryl liquid crystal layer of at least a portion of the coloured light of the wave band beyond the reflected waveband of the above-mentioned cholesteryl liquid crystal layer of reflection.

12. according to claim 5 or 9 described liquid crystal indicators, it is characterized in that: between above-mentioned infrabasal plate and above-mentioned color filter layer, form the cholesteryl liquid crystal layer, the area on this formed plane is than the area on the formed plane of above-mentioned color filter layer or identical or big.

13. according to claim 5 or 9 described liquid crystal indicators, it is characterized in that: between above-mentioned infrabasal plate and above-mentioned color filter layer, the reflected waveband of set cholesteryl liquid crystal layer is narrower than the complementary colors wave band of each uveal transmission wave band of above-mentioned color filter layer.

14. according to claim 5 or 9 described liquid crystal indicators, it is characterized in that: also between above-mentioned infrabasal plate and above-mentioned color filter layer, in the zone of above-mentioned each regulation, the color that is provided with reflection and each uveal transmitted light of above-mentioned color filter layer is in the cholesteryl liquid crystal layer of at least a portion of coloured light of color of the relation of complementary colors.

15. according to claim 5 or 9 described liquid crystal indicators, it is characterized in that: between above-mentioned infrabasal plate and above-mentioned color filter layer, in the zone of above-mentioned each regulation, be provided with above-mentioned cholesteryl liquid crystal layer, and cover with transparent layer between each uvea.

16. an electronic equipment is characterized in that: possess any one the described liquid crystal indicator in the claim 1 to 15.

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