WO2009081771A1

WO2009081771A1 - Display device

Info

Publication number: WO2009081771A1
Application number: PCT/JP2008/072672
Authority: WO
Inventors: Shigeru Shibazaki
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2007-12-21
Filing date: 2008-12-12
Publication date: 2009-07-02
Also published as: JP4452741B2; JP2009151209A

Abstract

Liquid crystals forming pixel portions (12, 14) of a light transmission scattering type liquid crystal (7) are orientated to be parallel to a polarization axis of a polarization light source (17) from a first direction and form, on a surface of a thin film-shaped electrode (1), a micro grating as compared to the wavelength of a polarization light source light (21). Thus, the polarization light source light (21) is reflected between the rear surfaces of the thin film-shaped electrode (1) and the light transmission scattering type liquid crystal (7) and then reflected by an inclined portion (1a) of the thin film electrode (1) so as to come into a pixel portion (13) in the region where the inclined portion (1a) of a light transmission scattering type liquid crystal panel (8) is formed and is spread/emitted as a radiation light (16). It should be noted that by adjusting the position of the inclined portion (1a), it is possible to control the position of the display pixel portion (13) from which the radiation light (16) is emitted. This enables provision of a display device which can effectively use light.

Description

Display device

The present invention relates to a display apparatus, and in particular, a light source system capable of performing luminance modulation by an input video signal, and outputting / irradiating its R, G, B output light to pixels constituting a predetermined horizontal scanning line, line-sequential scanning The present invention relates to a display device (display device) for displaying an image.

In recent years, LCD type displays and the like have been widely used. Furthermore, as a next-generation display device, for example, a display device using a light transmission scattering type liquid crystal has been proposed (see Patent Document 1). This display device uses the relationship between the polarization characteristic of the incident light of the light transmission / scattering type liquid crystal and the electro-optical polarization characteristic of the liquid crystal as its basic principle, and combines these two basic principles.

That is, as shown in FIG. 1A of Patent Document 1, the structure of the display of Patent Document 1 is a light source system for reproducing all pixels for one line in the horizontal scanning line direction, which can perform luminance modulation with an input video signal. A mechanism for outputting light converted into p or s polarized light in the light source system, and displaying the output light of the light source system for reproducing all pixels for one line in the horizontal scanning line direction on the user's viewing side And a device having a function of non-displaying and a function of line-sequentially scanning the output light of the light source system, and a drive circuit (not shown) for operating the function. As a mechanism for line-sequentially scanning the output light of the light source system, for example, a mechanism for moving the inside of the liquid crystal layer by utilizing the electro-optical characteristics of the light transmissive scattering type liquid crystal and drive control for performing the movement in association with display. A circuit and a circuit may be provided.

Further, as a technique using a method of bending the light emission direction from the display device by 90 degrees with respect to the incident direction, for example, there is a technique described in Patent Document 2.

The optical switch function part of patent document 2 has the light ray direction change member 201, as shown in FIG. 8, This light direction change member has electroconductivity, such as a metal material, a polymeric material, an inorganic material, etc. A bendable film or thin film can be used, for example, a thin film of TiNi is used, and the thin film has a thickness of 4 μm. At least one surface of the thin film is a mirror surface to be a reflective portion. A thin film of a TiNi alloy is corrosion resistant, soft, and has superelasticity that is resistant to plastic deformation. Since the thin film of the TiNi alloy is a shape memory alloy, it can store the state of curvature and can maintain the previous state even during a power failure.

On the other hand, the attracting portions 204 (3, 4) and 205 (5, 6) can attract the light beam direction changing member. For example, two attracting portions 204 (3, 4) and 205 (5, 6) are disposed to face each other, and the light ray redirecting member 201 is disposed in the space between them. The attracting portions 204 (3, 4) and 205 (5, 6) are provided with attracting means (actuators: 3 to 6) for attracting the light beam direction changing member 201.

The attracting means may be any means capable of attracting the light beam redirecting member, and for example, means such as an electric field, a magnetic field, air or the like may be used. When the attracting means utilizes an electric field, a plurality of electrodes are arranged side by side along the longitudinal direction of the beam redirecting member at each of the pair of attracting parts. For example, multiple parallel electrodes are mounted side by side along the direction of the incident beam. The density of the number of electrodes determines the minimum travel distance of the bend. By applying a voltage, for example 500 V (an example in which the thin film of the TiNi alloy is used and the distance between the attracting portions is 1 mm), to ground the beam redirecting member, electrostatic attractive force is applied to the beam redirecting member. Once generated, the beam redirecting member can be electrically attracted to the electrode. If an electrode is used, a non-contacting layer is placed between the electrode and the beam redirecting member to insulate between the electrode and the beam redirecting member. Also, if direct contact between the suction means and the beam redirecting member is not desirable, a non-contact layer is disposed between them. When air is used for suction, the light redirecting member can be suctioned to the attracting portion by arranging an aspirator for sucking in the attracting portion.

In addition, when a magnetic field is used, for example, a method of attaching a magnet or other magnetic material to at least one of the beam redirecting member or the attracting portion may be used. In that case, a device for generating electromagnetic induction is arranged to attract or release the magnet or other magnetic material. The device for generating the electromagnetic induction may be attached, for example, to the pulling part, but may be attached to the beam redirecting member or both as required. By attaching a magnet to at least one side and a magnet or other magnetic body to the other side, a self-holding function can be provided, and the state can be maintained without applying external energy such as energization. If the self-holding function is not required, attach a magnetic body other than a magnet to one side and attach a device that generates an electromagnetic induction to the other.

The attraction part provides a transmitting part through which the light beam can be transmitted at the place where the light beam passes. For the transmission part, for example, a transparent member such as ITO or glass can be used, and a space through which light can pass can be provided in the attraction part. Thereby, light can be emitted from a desired place.
JP 2007-183559 JP 2004-240308 A

FIG. 9 is a view showing an example of an ideal operation mechanism when the mechanism of the optical switch described in Patent Document 2 is applied to a display of the type described in Patent Document 1. As shown in FIG. In the case of ideally operating the above-mentioned optical switch function, as shown in FIG. 9, an insulator film provided on the inner surface of the first substrate 8 and the second substrate 11 disposed opposite to each other. The incident light 202 traveling along the substrate surface in the space formed between 9 and 10 is reflected by the thin film mirror electrode 201 disposed between the

insulator films

9 and 10, and the display is substantially perpendicular to the substrate surface The light 203 is used. FIG. 10 is a diagram schematically showing the problem of the configuration shown in FIG. In fact, the incident light is not a perfect parallel light, but in fact, as shown by the reference numeral 208, the incident light is reflected in the space by being reflected by the

insulating films

9 and 10, etc. The component of the reflected light that is not perpendicular to the substrate surface increases (209).

Therefore, in the structure shown in FIG. 9, it is understood that there is a problem in the diameter, parallelism, and linearity of the light source luminous flux when the light switch function part is reduced in size and size and actually used in a display.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a display device with good light utilization efficiency which does not depend on the diameter, parallelism, linearity and the like of the light source light flux. Another object of the present invention is to provide a double-sided display function of a display device.

According to one aspect of the present invention, a first substrate, a second substrate spaced apart from the first substrate by a certain distance, and a second substrate, the first substrate, and the second substrate And a light guide mechanism provided in a space formed between the two substrates, wherein the first substrate is a display device that performs display by pixels provided in a matrix in a two-dimensional plane of the substrate, A light transmissive scattering type liquid crystal panel provided on the side opposite to the second substrate, a plurality of transparent first plural electrodes provided on the second substrate side and arranged in the pixel column direction, and the electrodes And a first insulator film provided on the second substrate side, wherein the second substrate is provided on the first substrate side, and is disposed side by side in the pixel column direction. A second plurality of electrodes forming an electrode pair with a plurality of electrodes, and the first group of the second plurality of electrodes A second insulator film provided on the side, and the light guide mechanism is a thin film electrode disposed between the insulator film provided on the first substrate and the second substrate And extend in the same direction as the first and second plural electrodes respectively provided on the first substrate and the second substrate, and by the voltage applied to the first and second plural electrodes Between a first region in surface contact with the first insulator film surface, a second region in surface contact with the second insulator film surface, and the first region and the second region An input image having a strip-like thin film-like electrode having an inclined surface inclined with respect to the substrate surface and having a large number of diffraction gratings formed on the surface on the first substrate side and having a light reflection function In turning on / off the light transmission / scattering type liquid crystal panel disposed on the first substrate based on a signal A first voltage control mechanism capable of moving the pixel region in the column direction, and applying a voltage to the first plurality of electrodes and the second plurality of electrodes to line the inclined portion of the thin film electrode A second voltage control mechanism capable of moving in a direction, and introduction of polarized light in the column direction between insulator films disposed on the first substrate and the second substrate which are the light guide mechanism A light source system including a light source for introducing light in a first direction disposed at the same position, and polarized light from the light source, a scattering region of the light transmission / scattering type liquid crystal panel by the first voltage control mechanism And a synchronization control unit that synchronizes the timing of voltage application between the first voltage control mechanism and the second voltage control mechanism so that a region forming the inclined portion is formed at the same position. To provide a display device characterized by Be served. The diffraction grating preferably has a sufficiently small pitch with respect to the wavelength of incident light.

The first voltage control mechanism is configured to obtain a plurality of electro-optical characteristics in each of a plurality of striped liquid crystal layers defined by the thin film electrode and the light transmission / scattering type liquid crystal substrate. Control the on / off of the voltage applied to the electrode. The light transmission / scattering type liquid crystal material which controls the polarization direction of light introduced from the light source system in the first direction, and controls voltage between electrodes in the light transmission / scattering type liquid crystal panel by turning on / off The light is emitted from a predetermined pixel based on the scattering. The second voltage control mechanism drives the thin film electrode, controls the direction of polarized light introduced from the light source system in the first direction, and inputs the light to a pixel of the light transmission scattering type liquid crystal. When the output light of the light source system is s-polarized light, the light from the light source is aligned by orienting the polarization axis of the light transmission and scattering liquid crystal of the light transmission and scattering liquid crystal panel parallel to the output light. Propagates between the first substrate and the second substrate. When the output light of the light source system is p-polarized light, the polarization axis of the light transmission / scattering liquid crystal of the light transmission / scattering liquid crystal panel is oriented perpendicular to the polarization axis of the light from the light source, and the light from the light source is It propagates between the first substrate and the second substrate.

By respective applied voltages through respective insulator films between the thin film electrode, the first substrate, and the first and second electrodes disposed on the second substrate, The position of the inclined portion of the thin film electrode is determined by inclining the thin film electrode at a predetermined angle and changing the position to which a voltage is applied to the first plurality of electrodes and the second plurality of electrodes. It can be adjusted. It has a mechanism for converting the light flux of the light source into a rectangular and flat, and depolarizing it into p-polarized light or s-polarized light.

Also, in a space formed between the first substrate, a second substrate spaced apart from the first substrate by a distance, and the space formed between the first substrate and the second substrate. A display device having a light guide mechanism to be provided and performing display by pixels provided in a matrix on a two-dimensional plane of a substrate, wherein the first substrate is opposite to the second substrate A light transmission / scattering type liquid crystal panel provided on the second substrate side, a plurality of transparent first plurality of electrodes provided on the second substrate side and arranged in the pixel column direction, and provided on the second substrate side of the electrodes A light transmission / scattering type liquid crystal panel provided on the side opposite to the first substrate, and the second substrate provided on the first substrate side. A plurality of second pluralities arranged side by side in the pixel column direction and forming an electrode pair with the first plurality of electrodes; And a second insulator film provided on the first substrate side of the second plurality of electrodes, and the light guide mechanism includes the first substrate and the second substrate. A thin film-like electrode disposed between insulator films provided on the first and second substrates and extending in the same direction as the first and second plural electrodes respectively provided on the first substrate and the second substrate A first region in surface contact with the first insulator film surface by a voltage applied to the first and second plurality of electrodes, and a second region in surface contact with the second insulator film surface And a plurality of diffraction gratings formed on both sides of the first and second substrates, and having an inclined surface which is inclined with respect to the substrate surface between the first region and the second region. And a strip-like thin film electrode having a light reflection function, and the first and second groups based on an input video signal. A first voltage control mechanism capable of moving the pixel region in the column direction by turning on / off the light transmission / scattering type liquid crystal panel disposed in the second plurality of electrodes and the plurality of second electrodes A second voltage control mechanism capable of moving the inclined portion of the thin film electrode in the column direction by applying a voltage thereto, and the first substrate and the second substrate which are the light guide mechanism. A light source system including a light source for introducing light in a first direction and a second direction disposed at positions where light travels in the column direction and is introduced between insulating films disposed, and polarized light from the light source And the first voltage control mechanism and the first voltage control mechanism so that the scattering region of the light scattering type liquid crystal panel by the first voltage control mechanism and the region forming the inclined portion are formed at the same position. Timing of voltage application with the second voltage control mechanism And a synchronization control unit that synchronizes the display units.

Within a plurality of striped liquid crystal layers defined by the plurality of thin film electrodes, the plurality of thin electrodes, and the light transmissive scattering type liquid crystals respectively provided on the first substrate side and the second substrate side A third voltage control mechanism is provided to control on / off of voltages applied to the plurality of electrodes so as to obtain a plurality of electro-optical characteristics in each. In addition, the light transmission / scattering type provided on the first substrate side and the second substrate side is controlled by controlling the polarization direction of light introduced from the light source system in the first direction and the second direction. It is characterized in that the light is emitted from a predetermined pixel based on the scattering of the light transmission / scattering type liquid crystal material controlled by turning on / off the voltage between the electrodes in the liquid crystal panel. Furthermore, the plurality of thin film electrodes are driven to control the direction of polarized light introduced from the light source system in the first direction and the second direction, and the first substrate side and the second substrate side are controlled. It has a fourth voltage control mechanism to be input to the pixels of each of the provided light transmissive scattering type liquid crystal panels.

The display device according to the present invention can realize a very thin display panel. In addition, since a backlight is unnecessary, the display structure can be realized with a light transmission / scattering liquid crystal panel thickness (about 2 to 3 mm).

In addition, the display device according to the present invention has the advantage of being able to display on both sides using a single display panel.

It is a figure which shows the example of a whole structure of the display apparatus by the 1st Embodiment of this invention. It is a transmission perspective view centering on the strip shaped thin film electrode part in this embodiment. It is sectional drawing which shows the structural example of the light guide mechanism part (optical switch function part) in this Embodiment. It is a figure corresponding to FIG. 3, and is a figure which shows the course of light in detail. It is a figure which shows the mode of a drive of a strip shaped thin film electrode part. It is sectional drawing which shows the constructional example of the light guide mechanism part (switch function part) in the double-sided display apparatus in the 2nd Embodiment of this invention. It is a figure corresponding to FIG. 6, and is a figure which shows the course of light in detail. It is a figure which shows the principle of the conventional optical switch function. It is sectional drawing which shows the structure of the conventional optical switch function part using a strip shaped thin film electrode. It is a figure which shows the operation example of the structure shown in FIG. It is a figure which shows the problem of the structure shown to FIG. It is a figure which shows the orientation example (when light source light is p polarization | polarized-light) of the light transmissive scattering type liquid crystal by this Embodiment. It is a figure explaining the diffraction efficiency of the fine pitch diffraction grating by this embodiment. It is a figure which shows the example of the electrode structure of the light transmissive scattering type liquid crystal panel adapted to input light (21s). It is a figure which shows the example of the electrode structure of the light transmissive scattering type liquid crystal panel adapted to input light (21p).

Explanation of sign

DESCRIPTION OF SYMBOLS 1 thin film-like electrode 2. diffraction grating 3 4 drive transparent electrode 5 6 drive electrode 7 light transmissive scattering type liquid crystal panel 8 1st board | substrate 9 insulator film 10: insulator film, 11: second substrate, 17: space.

Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings. The left figure of FIG. 13 is a figure which shows the diffraction efficiency of the diffraction grating (fine pitch diffraction grating) which has the dimension shown to the FIG. 3 right figure. The horizontal axis is the period T (related to the wavelength λ), and the vertical axis is the diffraction efficiency. As shown in FIG. 13, the diffraction efficiency of the diffraction grating with a sufficiently small pitch with respect to the wavelength λ of the incident light is 100%, and it can be seen that light propagation without loss is possible. The inventor has conceived to apply this principle to a display device. In general, it is known that the pitch of the diffraction grating should be ≦ 0.2λ.

From this, assuming that the input minimum wavelength is 400 nm, the pitch of the diffraction grating formed on the strip thin film electrode surface disposed in the light guide may be 80 nm or less, and this size is determined by the current nanotechnology technology. It turns out that it is a level that can be produced. The pitch of the diffraction grating formed of the light transmissive scattering type liquid crystal sealed in the second substrate corresponds to the pitch between liquid crystal molecules and is about 2 nm, so it becomes a diffraction grating without reflection loss. Therefore, the incident light shown in FIGS. 9 and 10 propagates without loss while being repeatedly reflected in the light guide formed on the upper and lower surfaces, and is reflected as shown in FIG. It is possible to output efficiently from the scattering type liquid crystal surface.

Hereinafter, the embodiments of the present invention will be described more specifically. First, an example of the overall configuration of a single-sided display device will be described. Since the principle is the same in the case of double-sided display, the drawings that can be shared are omitted.

FIG. 1 is a view showing an example of the configuration of a display device according to the present embodiment. As shown in FIG. 1, the basic configuration of the display apparatus 100 according to the present embodiment is the polarized light source system 102 described above, a first substrate, and is defined by a plurality of optical switch function arrays 106 and internal electrodes. And a light switch function drive system 104 and a second substrate 105. The first substrate 106 and the second substrate 105 are provided. On the second substrate 105, a plurality of electrodes for driving thin film electrodes are disposed.

Hereinafter, the display device according to the present embodiment will be described in detail. FIG. 2 is a transparent perspective view of the display apparatus centering on the thin film thin film electrode 1 in the first embodiment, in which the arrangement direction of the thin film electrode 1 is shown. FIG. 3 is a cross-sectional view showing a configuration example of the light guide mechanism in the first embodiment. As shown in FIG. 2, the display device (partial view) shows

pixel rows

112, 113, 114 (only three rows are shown in the figure) extending along the traveling direction of incident light. In the light guide mechanism according to the present embodiment, the first substrate 8 is the light transmission / scattering type liquid crystal panel 7. Drive

transparent electrodes

3 and 4 for driving the thin film electrode 1 are provided on the back surface (inner surface side) of the first substrate 8. The inner surface side is covered with an insulator film 9.

The second substrate 11 is transparent, and driving

electrodes

5 and 6 for driving the thin film electrode 1 are provided on the upper surface (inner surface side), and these are covered with the insulator film 10.

Furthermore, in the space 17 formed between the insulator film 9 on the first substrate 8 side and the insulator film 10 on the second substrate 11 side, the diffraction grating 2 is formed on the surface on the first substrate 8 side. The thin film electrode 1 on which the is formed is disposed to form a light guide mechanism.

Next, description will be made with reference to FIG. As shown in FIG. 4, transparent

plural electrodes

3 and 4 provided on the back surface side (inner surface side) of the first substrate 8 (here, plural electrodes are collectively indicated by reference numerals 3 and 4) and The voltage applied to the

transparent electrodes

4 and 5 among the

transparent electrodes

5 and 6 provided on the surface of the second substrate 11 (here, a plurality of electrodes are grouped and indicated by reference numerals 5 and 6) Thus, the thin film electrode 1 disposed in the space between the first substrate 8 and the second substrate 11 is attracted to the first

transparent electrodes

4 and 5. The portion between them is disposed in the space 25 between the first substrate 8 and the second substrate 11, and is inclined at a predetermined angle with respect to the substrate surface in the space 25. FIG. 4 is a diagram showing the operation of the display device according to the present embodiment. The alignment of the liquid crystals forming the

pixel sections

12 and 14 of the light transmission / scattering type liquid crystal panel 7 is parallel to the polarization axis of the polarized light source light 21 from the first direction and at the wavelength of the polarized light source light 21. In comparison, as described above, since an extremely thin grating is formed on the surface of the thin film electrode 1, the polarized light source light 21 is reflected between the thin film electrode 1 and the back surface of the light transmission scattering type liquid crystal panel 7 The light travels in the space 25 while being reflected by the inclined portion 1a of 1, and is incident on the pixel portion 13 on the region where the inclined portion 1a of the light transmission / scattering type liquid crystal panel 8 is formed, and diffused and emitted as radiation 16 Is configured as. In addition, the position of the pixel part 13 corresponding to the position where the emitted light 16 is radiate | emitted can be controlled by adjusting the formation position of the inclination part 1a.

FIG. 5 is a view showing a state of driving of the thin film electrode 1 of the display apparatus according to the present embodiment for one row of FIG. 2 following FIG. 4 and Table 1 shows the position of the thin film electrode in FIG. It is a table | surface which shows the relationship between an upper side drive electrode and a lower side drive electrode.

As shown to FIG. 5 (A), the thin film electrode 1 by which the diffraction grating 2 is formed in the upper surface is a figure which shows the state provided in the position A. FIG. In this case, when the pixel to be displayed is indicated by reference numeral 13, the upper drive electrode group 1 = a) is off, the upper drive electrode group 2 = b) is on, and the upper drive electrode group 3 = c). ON, lower drive electrode group 4 = d) ON, lower drive electrode group 5 = e) OFF, lower drive electrode group 6 = f) OFF, lower drive electrode 7 = g) The thin film electrode 1 is attracted to the on side when it is off and one of the electrodes is on and the other is off, and basically it is not when both are on and when both are off it is floating. , The area can be sloped. 5A, the inclined portion A is formed in the pixel portion 13 and the incident light 21-25 becomes the outgoing light 22. In FIG. 5B, the inclined portion B is formed in the pixel portion 16 and the incident light 21- A portion 25 is the emitted light 23, and in FIG. 5C, a slope C is formed in the pixel section 19, and a voltage is applied to the electrode group so that the incident light 21-25 becomes the emitted light 24.

In the light transmission / scattering type liquid crystal panel 7 in synchronization with these operations, the position of the display pixel is 13, 16, as the area where the inclined portion is formed moves to A, B, C. It is configured to move as shown at 19. By these operations,

radiation light

22, 23, 24 from a predetermined pixel is radiated and scattered from the

positions

13, 16, 19 of the transparent electrodes toward the display direction (the upper side of the figure). The orientation of the

pixel portions

12, 13 and 14 of the light transmissive scattering type liquid crystal at this time will be described later.

In addition,

insulator films

9 and 10 are disposed between the

transparent electrodes

3, 4, 5 and 6 provided on the first substrate 1 and the second substrate 2 and the thin film electrode 1, and are transparent. A short circuit between the

electrodes

3, 4, 5, 6 and the thin film electrode 1 is prevented. As an example and thickness of a suitable insulating film which does not cause short circuit, for example, about 1 to 2 μm is preferable.

Next, the structure and operation of the light transmissive scattering type liquid crystal in the case of s-polarized input light will be described. FIG. 11 is a view showing an alignment example of the light transmission / scattering type liquid crystal in this case, and is a view showing an example in the case where the light source light is s-polarized light.

(1) Display Method of the Pixel 13s of FIG. 5 FIG. 11 is a view showing the alignment state of the light transmission scattering type liquid crystal, and the lower view is a cross sectional view along the line AA 'in the upper figure is there. Description will be made with reference to FIG. 5 as appropriate. The input light 21s is oriented as shown by

reference numerals

60 and 62 by the voltage applied between the side electrodes 50 disposed on the partition walls of the light transmission and scattering type liquid crystal panel unit 7, and forms the

diffraction grating portions

12s and 14s. Do. The diffraction grating sections 12s to 14s are indicated by broken lines. Although the following

diffraction grating sections

12s and 14s and the diffraction grating 2 of the thin film electrode 1 in FIG. 4 are both diffraction gratings, the diffraction grating formed in the light transmission scattering type liquid crystal is obtained by the liquid crystal molecular alignment. It is The diffraction grating on the thin film electrode surface is formed physically. The pitches of the gratings are all equal to or less than the wavelength.

In addition, it is general that the side electrode pairs disposed on the side wall surrounding the light transmission and scattering type liquid crystal are adjacent to each other in a state where they overlap each other by a predetermined width. An insulator is interposed in this overlapping region. In addition, the light source system is a second light condensing lens or a second light condensing lens in which a light source capable of luminance modulation by an input video signal, a first light condensing lens, a glass rod, and a polarization conversion element are bonded. And a condenser lens. The surface of the glass rod excluding the entrance and exit surfaces is mirror-processed.

The output light of the light source system capable of luminance modulation by the input video signal is reflected by the thin film electrode, and is input to the light transmission and scattering type liquid crystal substrate. Then, the image can be displayed and reproduced by line-sequential scanning by outputting to pixels constituting a predetermined horizontal scanning line. The thin film electrode is arranged to be orthogonally inclined at a position avoiding the incident direction of the outgoing light for each of the R, G and B pixels formed by sealing the light transmission scattering type liquid crystal, and the first substrate and the second A control mechanism is provided to turn on / off each of the substrate and the thin film electrode. With this control mechanism, light can be emitted from a desired pixel based on the scattering of the light transmissive scattering type liquid crystal obtained by controlling the direction of the output polarized light.

As shown in FIG. 5A and FIG. 14, the input light 21s is totally reflected by the diffraction grating portion 12s, reflected by the inclined portion A of the thin film electrode 1 and travels toward the first substrate 8 side. Input light 80 s to the pixel 13 s of the mold panel unit 7. As the pixel 13s is shown in the center state of FIG. 11, no voltage is applied and the liquid crystal molecules are in the scattering state, so the input light 80s shown in FIG. Scatter from

The user can recognize this scattered light as display light.

(2) Display Method of the Next Pixel As shown in FIG. 11, when the side electrode pairs 50 and 51 are connected by the

switches

54 and 55 respectively and a predetermined voltage is applied to the electrodes, the diffraction grating portion of the light transmission scattering type liquid crystal 12s becomes longer in the vertical scanning direction, and the diffraction grating portion 14s becomes shorter.

Therefore, the total reflection position of the input light 21s moves by one pixel in the vertical direction. At the moved pixel position, scattered light can be recognized as display light according to the same principle as the display of the pixel 13s. The term "total reflection position" also refers to a diffraction grating surface formed in the light transmission scattering liquid crystal and a diffraction grating surface formed on a thin film electrode surface.

(3) Display Method of the Next Pixel The

side electrodes

50, 51, 52 are connected by the

switches

54, 55, 56, 57, respectively, and a predetermined voltage is applied to the side electrodes. Is further elongated in the vertical direction, and the diffraction grating portion 14s is further shortened. Therefore, the total reflection position of the input light 21s is moved by one more pixel in the vertical direction. At the moved pixel position, scattered light can be recognized as display light according to the same principle as the display of the pixel 13s.

The timing of the applied voltage between the side electrodes 50 and the timing of the application of the voltage to the driving transparent electrode are controlled so that the position of the pixel 13s and the position of the reflection portion of the strip thin film electrode portion become the same. Ru. A control circuit for controlling such a drive circuit may be provided.

In the case of p-polarization, the control circuit applies an alternating voltage between the

electrodes

70, 71, 72 as shown in FIG. For example, the even numbered electrodes such as 70 and 72 are made common, the odd numbered electrodes such as 71 and 73 are made common, and the polarities are connected to be different from each other.

Next, the structure and operation of the light transmissive scattering type liquid crystal when the input light is p-polarized light will be described. FIG. 12 is a diagram showing an example of alignment of the light transmissive scattering type liquid crystal when the input light is p-polarized light, and corresponds to FIG. FIG. 15 is a diagram corresponding to FIG.

(1) Display Method of Pixel 13p FIG. 12 shows the alignment state of the light transmission / scattering type liquid crystal, and the lower figure is a cross-sectional view along the line BB ′ in the upper figure.

The input light 21p is oriented as indicated by

reference numerals

74 and 76 by voltages applied between the flat electrodes 70-71 and 72-73 disposed on the back surface of the front substrate of the light transmission scattering type liquid crystal panel section 7, The diffraction grating portion 12p is formed.

The input light 21p is totally reflected by the diffraction grating portion 12p, is reflected by the inclined portion of the thin film electrode 1, and is input to the pixel 13p of the light transmission and scattering type panel portion 7 as the input light 80p. The input light 80 p is scattered from the surface of the light transmission / scattering type liquid crystal panel unit 7 because the pixel 13 p is in a non-application and scattering state. The user can recognize this scattered light as the display light 16.

(2) Next Pixel Display Method When a predetermined voltage is applied between the side electrode pair 70-71 and 71-72, the diffraction grating portion 12p of the light transmission scattering type liquid crystal is elongated in the vertical direction, and the diffraction grating portion 14p is It becomes short. The total reflection position of the input light 21p moves by one pixel in the vertical direction. The display is the same as the display of the pixel 13p, so the description is omitted.

(3) Next-Pixel Display Method When a predetermined voltage is applied between the side electrodes 70-71, 71-72, and 72-73, the diffraction grating portion 12p of the light transmission scattering type liquid crystal is further elongated in the vertical direction. The diffraction grating portion 14p is further shortened. The display is the same as the display of the pixel 13p, so the description is omitted.

Next, a display device according to a second embodiment of the present invention will be described. The basic configuration and basic operation of the display device according to the present embodiment are the same as those of the display device according to the first embodiment, and therefore, the differences will be mainly described. FIG. 6 is a view showing an example of the configuration of a display apparatus centering on the light guide mechanism according to the present embodiment. As shown in FIG. 6, the diffraction grating 2 is provided not only on one side of the thin film electrode 1 but also on both front and back sides. Further, not only the first substrate 8 but also the second substrate 11 is provided with the same structure as the panel 7 using the light transmission / scattering type liquid crystal. As a result, the polarized light source light is formed by the space defined by the first substrate 8 and the second substrate 11 and along the first direction in the light guide portion to be the light introduction portion, and along the substrate surface. It is introduced in both of the second direction which is the opposite direction (26, 28). The inclination angle is preferably about 45 degrees so as to be the same for both.

The polarized light source light introduced in this manner is, as shown in FIG. 6, the scattered display pixels of the light transmission / scattering type liquid crystal panel enclosed in the first substrate 8 and the second substrate 11, respectively. It is comprised so that it can carry out radiation diffusion simultaneously from the parts 31 and 34 (display light 27 and 29). Similarly to the first embodiment, the

display pixel portions

31 and 34 have the

electrode groups

3 and 4 and the

electrode groups

5 and 6 based on the voltages applied to a large number of electrode groups insulated by the insulating

films

8 and 9. And the on / off of the voltage application. The orientation of the

pixel sections

30, 31 and 32 (both sides) of the light transmission / scattering type liquid crystal at this time is the same as that shown in FIG. Further, the configuration of the thin film electrode 1 is also the same as that of the first embodiment except that the diffraction grating 2 is provided on both the front and back sides. FIG. 7 is a diagram illustrating in more detail the progress of the incident lights 26 and 28 in the configuration of FIG. The incident lights 26 and 28 are diffracted by the diffraction grating of the thin film electrode 1 and scattered by the scattered

light

27 and 29 from the display pixel portion 31 on the first substrate 8 side and the display pixel portion 34 on the second substrate side. It becomes display light, and the same screen can be viewed from both the first substrate 8 side and the second substrate 11 side. At this time, since the incident light is efficiently condensed on the

display pixel portions

31 and 34 by the inclined portion and the diffraction grating, good display can be performed on both sides.

Also in the display device according to the present embodiment described above, the main optical system material in the path from the signal light source to the scattering surface (display surface) is only the liquid crystal reflection surface and the thin film electrode, It has the advantage of improving. Further, since a light source emitting light of a predetermined wavelength is used as the signal light source, a color filter is not necessary. Also, since the black level can be realized by setting the light emission of the signal light source to 0, it is theoretically possible to make the contrast ratio infinite.

The display device according to the present embodiment is in principle a self-emission type, and the contrast ratio is not limited by the backlight brightness as in TFT-LCD, and the signal light source is independent in RGB pixel units. Therefore, the same speed luminance modulation as that of a CRT or the like is possible.

Therefore, there is an advantage that the contrast ratio of each adjacent pixel can be freely set. The contrast ratio between adjacent pixels is significantly improved over TFT-LCD.

A very thin display panel can be realized. There is an advantage that the display structure can be realized with a light transmission / scattering liquid crystal panel thickness (about 2 to 3 mm) or so, since a backlight is not necessary.

There is also an advantage that the color reproducibility is good. Since the signal light source is independent for each pixel, the degree of freedom in setting the chromaticity coordinate values of each of the RGB colors is high. For example, color reproducibility of NTSC, HDTV, etc. can be reproduced faithfully.

In addition, since the signal light source independently corresponds to the pixel unit, a multi-primary-color display can be realized in which C (cyan), M (magenta), Y (yellow) and the like other than RGB are added in the future of the display evolution. can do.

Further, since the substrate material is black and reflection of external light is small, a display capable of high contrast display even in a bright room can be realized.

The present invention is applicable to a display device and an electronic device using the same.

Claims

A first substrate, a second substrate spaced apart from the first substrate by a distance, and a space formed between the first substrate and the second substrate A display device having a light guide mechanism and performing display by pixels provided in a matrix on a two-dimensional plane of a substrate,
The first substrate is a light transmission / scattering type liquid crystal panel provided on the opposite side to the second substrate, and a transparent first substrate provided on the second substrate side and arranged in the pixel column direction. A plurality of electrodes, and a first insulator film provided on the second substrate side of the electrodes;
The second substrate is provided on the first substrate side, arranged in the pixel column direction, and forming a pair of electrodes with the first plurality of electrodes; and the second substrate A second insulator film provided on the first substrate side of the plurality of electrodes;
The light guide mechanism is a thin film-like electrode disposed between the first substrate and an insulator film provided on the second substrate, and the light guide mechanism is provided for each of the first substrate and the second substrate. A first region extending in the same direction as the provided first and second plural electrodes, and in surface contact with the first insulator film surface by a voltage applied to the first and second plural electrodes; A second region in surface contact with the second insulator film surface, and an inclined surface inclined with respect to the substrate surface between the first region and the second region; A strip-like thin film electrode having a large number of diffraction gratings formed on the surface of the substrate side of the
A first voltage control mechanism capable of moving a pixel region in a column direction by turning on / off the light transmission / scattering type liquid crystal panel disposed on the first substrate based on an input video signal;
A second voltage control mechanism capable of moving the inclined portion of the thin film electrode in the column direction by applying a voltage to the first plurality of electrodes and the second plurality of electrodes;
The light is introduced between the insulator films disposed on the first substrate and the second substrate, which are the light guide mechanism, in the column direction, and light is introduced in a first direction disposed at a position for introducing polarized light. A light source system including a light source
The polarized light from the light source is formed so that the scattering area of the light transmission / scattering type liquid crystal panel by the first voltage control mechanism and the area forming the inclined portion are formed at the same position. A display device comprising: a synchronization control unit that synchronizes voltage application timings of the first voltage control mechanism and the second voltage control mechanism.
The display device according to claim 1, wherein the diffraction grating has a sufficiently small pitch with respect to the wavelength of incident light.
The first voltage control mechanism is configured to obtain a plurality of electro-optical characteristics in each of a plurality of striped liquid crystal layers defined by the thin film electrode and the light transmissive scattering type liquid crystal panel. The display apparatus according to claim 1, wherein on / off control of a voltage applied to the electrode is performed.
The light transmission / scattering type liquid crystal material which controls the polarization direction of light introduced from the light source system in the first direction, and controls voltage between electrodes in the light transmission / scattering type liquid crystal panel by turning on / off The display apparatus according to any one of claims 1 to 3, wherein the light is emitted from a predetermined pixel based on scattering.
The second voltage control mechanism drives the thin film electrode, controls the direction of polarized light introduced from the light source system in the first direction, and causes the light transmission scattering liquid crystal pixel to input the light. The display device according to any one of claims 1 to 4, characterized in that.
When the output light of the light source system is s-polarized light, the light from the light source is the light from the light source by orienting the polarization axis of the light transmission and scattering liquid crystal of the light transmission and scattering liquid crystal panel parallel to the output light. The display apparatus according to any one of claims 1 to 5, wherein the display apparatus propagates between the first substrate and the second substrate.
When the output light of the light source system is p-polarized light, the polarization axis of the light transmission / scattering liquid crystal of the light transmission / scattering liquid crystal panel is oriented perpendicular to the polarization axis of the light from the light source, and the light from the light source is The display apparatus according to any one of claims 1 to 5, wherein the display apparatus propagates between the first substrate and the second substrate.
By respective applied voltages through respective insulator films between the thin film electrode, the first substrate, and the first and second electrodes disposed on the second substrate, The position of the inclined portion of the thin film electrode is determined by inclining the thin film electrode at a predetermined angle and changing the position to which a voltage is applied to the first plurality of electrodes and the second plurality of electrodes. A display device according to any of the preceding claims, characterized in that it is adjusted.
The display apparatus according to any one of claims 1 to 8, further comprising a mechanism for converting the light flux of the light source into a rectangular and flat light and depolarizing the light into p-polarized light or s-polarized light.
A sealing material having a through hole for introducing output light from the light source to the inclined electrode surface of the thin film electrode formed between the first substrate and the second substrate is formed in the light guide portion. 10. A display device according to any one of the preceding claims, characterized in that
The side electrode pairs disposed on the side wall surrounding the light transmission / scattering type liquid crystal are adjacent to each other in a state of overlapping each other by a predetermined width, and an insulator is interposed in the overlapping region. A display device according to any one of the preceding claims.
The light source system is a second light collecting lens in which a light source capable of luminance modulation by an input video signal, a first light collecting lens, a glass rod, and a polarization converting element are bonded. A display device according to any one of the preceding claims, characterized in that it comprises a lens.
The display device according to claim 12, wherein a surface of the glass rod excluding an incident / exit surface is mirror-processed.
The display device according to any one of claims 1 to 13, wherein a region of the scattering state and the reflection state region are switched by an applied voltage of a side electrode surrounding the light transmissive scattering type liquid crystal.
A light source system comprising the display device according to any one of claims 1 to 14 and capable of performing luminance modulation by an input video signal, and reflecting light output from the light source system by the thin film electrode, the light transmission scattering A system for inputting to a liquid crystal substrate, outputting to pixels constituting a predetermined horizontal scanning line, and displaying and reproducing an image by line sequential scanning,
The thin film-like electrodes disposed orthogonally inclined at positions avoiding the incident direction of the emitted light for each of R, G and B pixels formed by sealing the light transmission scattering type liquid crystal;
A control mechanism for controlling on / off of each of the first and second substrates and the thin film electrode;
A display system characterized in that light is emitted from a desired pixel based on the scattering of the light transmission / scattering type liquid crystal obtained by controlling the direction of the output polarized light by the control mechanism.
A first substrate, a second substrate spaced apart from the first substrate by a distance, and a space formed between the first substrate and the second substrate A display device having a light guide mechanism and performing display by pixels provided in a matrix on a two-dimensional plane of a substrate,
The first substrate is a light transmission / scattering type liquid crystal panel provided on the opposite side to the second substrate, and a transparent first substrate provided on the second substrate side and arranged in the pixel column direction. A plurality of electrodes, and a first insulator film provided on the second substrate side of the electrodes;
The second substrate is provided on the light transmission / scattering type liquid crystal panel provided on the side opposite to the first substrate, and on the side of the first substrate, and arranged in parallel in the pixel column direction. And a second insulator film provided on the first substrate side of the second plurality of electrodes to form an electrode pair with the electrode of
The light guide mechanism is a thin film-like electrode disposed between the first substrate and an insulator film provided on the second substrate, and the light guide mechanism is provided for each of the first substrate and the second substrate. A first region extending in the same direction as the provided first and second plural electrodes, and in surface contact with the first insulator film surface by a voltage applied to the first and second plural electrodes; A second region in surface contact with the second insulator film surface, and an inclined surface inclined with respect to the substrate surface between the first region and the second region; And a strip-like thin film electrode having a large number of diffraction gratings formed on both sides of the second substrate and having a light reflection function,
A first voltage control mechanism capable of moving a pixel region in a column direction by turning on and off the light transmission / scattering type liquid crystal panel disposed on the first and second substrates based on an input video signal;
A second voltage control mechanism capable of moving the inclined portion of the thin film electrode in the column direction by applying a voltage to the first plurality of electrodes and the second plurality of electrodes;
A first direction and a second direction disposed at positions where the polarized light is introduced to advance in the column direction between the insulator films disposed on the first substrate and the second substrate which are the light guide mechanism. A light source system comprising a light source for introducing light in a direction and
The polarized light from the light source is formed so that the scattering area of the light transmission / scattering type liquid crystal panel by the first voltage control mechanism and the area forming the inclined portion are formed at the same position. And a synchronization control unit for synchronizing timings of voltage application between the first voltage control mechanism and the second voltage control mechanism.
17. The dual display display device according to claim 16, wherein the diffraction grating has a sufficiently small pitch with respect to the wavelength of incident light.
Within a plurality of striped liquid crystal layers defined by the plurality of thin film electrodes, the plurality of thin electrodes, and the light transmissive scattering type liquid crystals respectively provided on the first substrate side and the second substrate side The double-sided display device according to claim 16, further comprising: a third voltage control mechanism that performs on / off control of voltages applied to the plurality of electrodes so as to obtain a plurality of electro-optical characteristics in each. .
The light transmission / scattering type liquid crystal panel provided on the first substrate side and the second substrate side by controlling the polarization direction of light introduced from the light source system in the first direction and the second direction. The double-sided display according to claim 16 or 17, wherein the light is emitted from a predetermined pixel based on scattering of the light transmission / scattering type liquid crystal material controlled by turning on / off a voltage between the electrodes in the inner side. Display device.
Driving the plurality of thin film electrodes to control the direction of polarized light introduced from the light source system in the first direction and the second direction, and provided on the first substrate side and the second substrate side 20. The double-sided display device according to claim 17, further comprising: a fourth voltage control mechanism to be input to a pixel of each of the light transmission / scattering type liquid crystal panels.
When the output light of the light source system is s-polarized light, the light transmission is caused by the voltage applied to the electrode pair of the light transmission / scattering type liquid crystal provided on the first substrate side and the second substrate side. The polarization axis of the scattering liquid crystal is aligned horizontally to the first substrate surface and the second substrate surface, and the output light of the light source system is the first from the first direction and the second direction, respectively. 21. A dual-sided display device according to any one of claims 16 to 20, which propagates between the second substrate and the second substrate.
When the output light of the light source system is p-polarized light, the light transmission is caused by the voltage applied to the electrode pair of the light transmissive scattering type liquid crystal provided on the first substrate side and the second substrate side. The polarization axis of the scattering type liquid crystal is made parallel to the output light p polarization from the first and second directions, and the output light of the light source system is respectively from the first direction and the second direction. 21. A dual-sided display as claimed in any one of claims 16 to 20, propagating between a first substrate and a second substrate.
The light source system according to the present invention has a mechanism for converting the light flux of the light source from each of the light source systems propagating in the first and second directions into a rectangular and flat, and depolarizing it into p polarized light or s polarized light. 22. A double sided display device as claimed in any one of the preceding claims.
Having a through-hole of the output light formed on the sealing material and inputting the output light from the light source system from the first and second directions provided between the first substrate and the second substrate 24. A dual sided display device as claimed in any one of claims 16 to 23, characterized in that.
The side electrode pairs disposed on the side walls of the light transmission / scattering type liquid crystal panel on the side of the first substrate and the side of the second substrate are adjacent to each other in a state where they overlap each other by a predetermined width. The double-sided display device according to any one of claims 16 to 23, wherein an insulator is inserted in the area.
The light source system is a second light source in which output light in a first direction and output light in a second direction can be intensity-modulated by an input video signal, a first condenser lens, a glass rod, and a polarization conversion element The display apparatus according to any one of claims 16 to 23, further comprising a second condensing lens in which a condensing lens or a polarization conversion element and a wavelength plate are bonded.
The double-sided display apparatus according to claim 26, wherein a surface of the glass rod excluding the incident / exit surface is mirror-processed.
The side electrode pairs disposed on the side wall surrounding the light transmission / scattering type liquid crystal enclosed in the first substrate and the second substrate are adjacent to each other in a state in which they overlap each other by a predetermined width. 28. A dual sided display device as claimed in any of claims 16 to 27, characterized in that an insulator is interposed in the wrapped area.
In each of the light source systems from the first and second directions, a second light collecting lens or a polarization conversion obtained by bonding a light source capable of performing luminance modulation with an input video signal, a first light collecting lens, a glass rod, and a polarization conversion element 29. A double-sided display as claimed in any one of claims 16 to 28, characterized in that it comprises a second condenser lens in which the element and the wave plate are bonded.
30. The double-sided display as claimed in claim 29, wherein a surface of the glass rod excluding an incident / exit surface is mirror-processed.
The thin film-like electrodes disposed orthogonally inclined at positions avoiding the incident direction of the emitted light for each of R, G and B pixels formed by sealing the light transmission scattering type liquid crystal;
A control mechanism for controlling on / off of each of the first and second substrates and the thin film electrode;
29. The light is emitted from a desired pixel based on the scattering of the light transmission / scattering type liquid crystal obtained by controlling the direction of the output polarized light by the control mechanism. The double-sided display device according to claim 1.
By interlocking the input of the input video signal and the voltage control mechanism, each of the light source light outputted from the first and second directions is the first substrate surface and / or the second substrate surface. The double-sided display device according to any one of claims 16 to 29, further comprising: a control unit that performs control to output in units of one pixel.
The control unit performs control capable of controlling output of the light source light alternately or simultaneously from pixels located at the same position between the first substrate surface and the second substrate surface according to the input video signal. 33. A dual sided display device as claimed in claim 32.
Output light in which light source light of the light source system is controlled to p or s polarized light is introduced in the direction of vertical scanning, and a space sandwiched between the insulating band film of the first substrate and the insulating band film of the second substrate is The light propagates and is reflected on both sides of the thin film electrode having a predetermined inclination, and is emitted to the light transmission dispersion type liquid crystal layer disposed on the first substrate side and the second substrate side. The invention is characterized in that the light source light is emitted from the first substrate surface and the second substrate surface based on the electro-optical characteristics of the light transmission / scattering type liquid crystal material controlled by turning on / off an applied voltage. The double-sided display device according to any one of 16 to 27.
Output light in which source light of a plurality of light source systems corresponding to the number of display pixels is controlled to p or s polarization is introduced in the direction of vertical scanning, and voltages at two pairs of opposite electrode pairs are controlled by on / off The screen is formed by emitting the polarized light source light from the first substrate surface and the second substrate surface by line sequential scanning based on the electro-optical characteristics of the light transmission / scattering type liquid crystal material. The double-sided display device according to any one of Items 16 to 28.
Based on the scattering of the light transmission / scattering type liquid crystal material, which controls the direction of polarized light introduced from the light source system in the first direction, and controls the voltage at two pairs of opposite electrode pairs by on / off The double-sided display device according to any one of claims 16 to 31, wherein the light is emitted from a predetermined pixel and / or the first substrate surface and / or the second substrate surface.
When the output light from the light source system is s-polarized light, the polarization axis of the light transmission / scattering type liquid crystal is made horizontal to the first substrate surface by a voltage applied to the first and second counter electrodes. The light output from the light source system is directed between the electrodes and propagates through the space sandwiched between the insulating band film of the first substrate and the insulating band film of the second substrate, and a thin film electrode having a predetermined inclination 33. The voltage application mechanism according to claim 16, further comprising: a voltage application mechanism that reflects light on both sides and emits the light to the light transmission dispersion type liquid crystal layer disposed on the first substrate side and the second substrate side. The double-sided display device according to claim 1.
When the output light from the light source system is p-polarized light, the polarization axis of the light transmissive scattering type liquid crystal is output in the first and second directions by a voltage applied to the first and second counter electrodes. The light source system is oriented vertically to polarized light source light, and the output light of the light source system propagates in the space between the insulating band film of the first substrate and the insulating band film of the second substrate between the electrodes, It has a voltage application mechanism which reflects light from both sides of a thin film electrode having a predetermined inclination and causes the light transmission dispersion type liquid crystal layer disposed on the first substrate side and the second substrate side to emit light. 34. A dual display display device according to any one of claims 16 to 33.
A voltage is applied to the first and second counter electrode pairs so that output light, which is p-polarized light or s-polarized light of the light source system, is output from the emission surface of the pixel through the incident path to the pixel. 35. A dual sided display as claimed in any one of claims 20 to 34, characterized in that it has a voltage control mechanism which turns off together.
36. The device according to any one of claims 20 to 35, characterized in that it has a one-polarization mechanism for converting the light flux of the light source from the light source system into a rectangle and a flat and depolarizing it into p-polarization or s-polarization. Double-sided display device.
A through hole formed in a sealing material for sealing the liquid crystal and introducing the output light from the light source system into the space sandwiched between the insulating band film of the first substrate and the insulating band film of the second substrate 37. A dual sided display device according to any of claims 20 to 36, characterized in that
The electrodes disposed on the side walls of the respective light transmissive scattering type liquid crystals disposed on the first and second substrates are disposed adjacent to each other in a state of overlapping each other by a predetermined width, and the overlapping regions An apparatus according to any one of claims 16 to 37, characterized in that an insulator is inserted in the.
The light source system includes a light source capable of luminance modulation by an input video signal, a first condensing lens and a glass rod, and a second condensing lens or polarization converting element laminated with a polarization conversion element and a wavelength plate The double-sided display apparatus according to any one of claims 16 to 38, further comprising a second condenser lens.
The display device according to claim 43, wherein a surface of the screen forming the glass rod excluding an incident / exit surface is mirror-processed.
A signal processing system and a signal system for enabling display of the same content as the display content of the first substrate surface on the second substrate surface or display of different display content with a single display panel 44. A dual sided display device according to any one of the claims 16 to 43, characterized in that it comprises.
45. A scanning direction control means capable of arbitrarily setting a horizontal scanning direction of each of the display surface of the first substrate and the display surface of the second substrate. An information processing apparatus comprising the double-sided display according to the above.
The region in the scattering state and the region in the reflection state are switched according to an applied voltage of the side electrodes of the first and second light transmission / scattering type liquid crystals, according to any one of claims 1 to 15. 47. A display as claimed in any one of claims 16 to 46 and a dual display as claimed in any one of claims 16 to 46.
17. A display device according to any one of the preceding claims, characterized in that the light sources are arranged in different colors with adjacent light sources.
48. A dual display display device as claimed in any of claims 17 to 47, wherein the light sources are arranged in different colors with adjacent light sources.
Light emitted to one side of the substrate from an adjacent light source is arranged in the same color along the second direction, and light emitted to the opposite side of the substrate is directed to the second direction 49. A dual sided display device according to any one of claims 17 to 46, 48, wherein different color arrangements are provided along the.
50. The light according to claim 17, wherein the light emitted from one of the adjacent light sources to one side and the other side of the substrate is alternately emitted along the second direction. The double-sided display device according to any one of the above.
A light source system capable of performing luminance modulation by an input video signal, and the output light of the light source system is reflected by the thin film electrode, input to the light transmission and scattering type liquid crystal panel, and output to pixels constituting a predetermined horizontal scanning line. A system for displaying and reproducing an image by line sequential scanning,
The thin film-like electrodes disposed orthogonally inclined at positions avoiding the incident direction of the emitted light for each of R, G and B pixels formed by sealing the light transmission scattering type liquid crystal;
A control mechanism for controlling on / off of each of the first and second substrates and the thin film electrode;
A double-sided display system characterized in that light is emitted from a desired pixel based on the scattering of the light transmission / scattering type liquid crystal obtained by controlling the first and second directions of the output polarized light by the control mechanism. .
A light source system capable of performing luminance modulation by an input video signal, and the output light of the light source system is reflected by the thin film electrode, input to the light transmission and scattering type liquid crystal panel, and output to pixels constituting a predetermined horizontal scanning line. A system for displaying and reproducing an image by line sequential scanning,
The thin film-like electrodes disposed orthogonally inclined at positions avoiding the incident direction of the emitted light for each of R, G and B pixels formed by sealing the light transmission scattering type liquid crystal;
A control mechanism for controlling on / off of each of the first and second substrates and the thin film electrode;
In a system capable of causing light emission from a desired pixel based on the scattering of the light transmissive scattering type liquid crystal obtained by controlling the first and second directions of the output polarized light by the control mechanism, the light The display device according to any one of claims 1 to 14, characterized in that the orientation of the transmissive scattering type liquid crystal can be switched horizontally or vertically to the polarization axis of the output polarized light source light.
A light source system capable of performing luminance modulation by an input video signal, and the output light of the light source system is reflected by the thin film electrode, input to the light transmissive scattering type liquid crystal substrate, and output to pixels constituting a predetermined horizontal scanning line. A system for displaying and reproducing an image by line sequential scanning,
The thin film-like electrodes disposed orthogonally inclined at positions avoiding the incident direction of the emitted light for each of R, G and B pixels formed by sealing the light transmission scattering type liquid crystal;
A control mechanism for controlling on / off of each of the first and second substrates and the thin film electrode;
In a system capable of causing light emission from a desired pixel based on the scattering of the light transmissive scattering type liquid crystal obtained by controlling the first and second directions of the output polarized light by the control mechanism, the light The double-sided display according to any one of claims 15 to 46, 48, 49, characterized in that the orientation of the transmission / scattering type liquid crystal can be switched horizontally or vertically to the polarization axis of the output polarized light source light. Display device.