JP2009175569A - Liquid crystal device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal device capable of improving light use efficiency to increase front luminance, and to provide an electronic apparatus. <P>SOLUTION: The liquid crystal device 10 includes a liquid crystal layer 18 disposed between a pair of opposite substrates 14 and 16, polarizing plates 46 and 48 disposed in parallel to the pair of substrates 14 and 16, and a color filter 40 disposed on the opposite side of the liquid crystal layer 18 across the polarizing plate 48. The polarizing plate 48 is disposed on the opposite side from the liquid-crystal-layer-side surface of the substrate 16 between the pair of substrates 14 and 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid crystal device and an electronic apparatus.

  2. Description of the Related Art Conventionally, in a liquid crystal device having a structure in which an element substrate on which a switching element is formed and a counter substrate on which a color filter is opposed to each other are bonded together by a sealing material, There is known a liquid crystal panel in which a light shielding member is formed in a region corresponding to 1 to function as a black mask (see, for example, Patent Document 1).

JP 2003-295178 A

  However, in a liquid crystal panel having a conventional structure, since a material in which a pigment is dispersed in a polymer binder is used as a color filter layer, the polarization of incident light is disturbed in the pigment portion, resulting in an elliptically polarized component. Incident light leaks, and as a result, the contrast of the liquid crystal panel is deteriorated, so that a reduction in contrast cannot be prevented. Further, in the conventional liquid crystal display device, the color filter and the polarizing plate are installed in such a manner that the glass substrate is sandwiched between them, and the thickness of the glass substrate is usually about 1 mm. Since it is impossible to reduce the distance, the disadvantage of high viewing angle dependency that the sharpness of the display is lost when viewing the screen of the liquid crystal display device from an oblique direction is unavoidable, and it is a big problem of improving display image quality. It has become. When depolarization occurs in the color filter layer in this way, the transmitted light in the pixels in the dark state increases as compared with the case where there is little or no depolarization, and the performance of the apparatus deteriorates.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A liquid crystal layer disposed between a pair of opposing substrates, a polarizing plate disposed in parallel with the pair of substrates, and a liquid crystal layer disposed on the opposite side of the polarizing plate A liquid crystal device comprising: a color filter;

  According to this, by bringing the color filter out of the polarizing plate, depolarization by the color filter is eliminated, the light use efficiency is improved, and the liquid crystal device capable of increasing the front luminance is provided.

  Application Example 2 In the above liquid crystal device, the polarizing plate is disposed on the opposite side of the liquid crystal layer side surface of one of the pair of substrates. .

  According to this, since a polarizing plate is arrange | positioned on the outer surface of a board | substrate, preparation of a polarizing plate becomes easy.

  Application Example 3 In the liquid crystal device, the color filter corresponds to each pixel region and is formed on a substrate outside the polarizing plate.

  According to this, after producing a color filter, it can be set as the structure closely_contact | adhered to a polarizing plate, and preparation of a color filter becomes easy.

  Application Example 4 In the above liquid crystal device, the one substrate is thinly polished.

  According to this, the color filter is disposed in the vicinity of the liquid crystal layer, and it becomes easy to correspond to the pixel region.

  Application Example 5 In the liquid crystal device, the light emitted from the surface light emitter is disposed between the surface light emitter disposed outside the color filter, and the surface light emitter and the color filter. A liquid crystal device further comprising a converging lens for converging on a pixel region.

  According to this, the light incident on the liquid crystal device is converged on the pixel area by the converging lens, and the light use efficiency becomes very high. Also, the front brightness is improved. Furthermore, since the front luminance is improved, even when a liquid crystal device having the same front luminance is configured, power consumption can be reduced.

  Application Example 6 In the above-described liquid crystal device, the polarizing plate is disposed on a surface on the liquid crystal layer side of one of the pair of substrates, and the color filter includes the one substrate and the polarizing plate. A liquid crystal device, wherein the liquid crystal device is disposed between a plate and a plate.

  According to this, since the polarizing plate and the color filter are arranged on the inner surface of the substrate, the liquid crystal device can be thinned.

  Application Example 7 In the above liquid crystal device, the polarizing plate is a grid having a polarization separation function, including a plurality of fine wires.

  According to this, in the incident light, a component having a polarization axis parallel to the fine wire is reflected in the grid, and a component having a polarization axis perpendicular to the fine wire is transmitted. As described above, incident light can be separated into reflected light and transmitted light having different polarization states.

  Application Example 8 Electronic equipment including the liquid crystal device described above.

  According to this, since the liquid crystal device is mounted, it is possible to provide an electronic device that can improve the front luminance and improve the visibility.

  Hereinafter, embodiments will be described with reference to the drawings. In the present embodiment, the liquid crystal device will be described by taking, as an example, a liquid crystal device using an element substrate on which switching elements such as TFTs (thin film transistors) are formed and a counter substrate disposed to face the element substrate.

(First embodiment)
(Liquid crystal device)
1A and 1B are diagrams illustrating a schematic configuration of a liquid crystal device 10 according to the present embodiment, in which FIG. 1A is a perspective view and FIG. 1B is a cross-sectional view taken along a line II in FIG. The liquid crystal device 10 includes an element substrate 14 and a counter substrate 16 (one substrate) as a pair of substrates bonded to each other with a frame-shaped sealing material 12 therebetween. Liquid crystal 18 is sealed in a space surrounded by the element substrate 14, the counter substrate 16, and the sealing material 12. The element substrate 14 is larger than the counter substrate 16 and is bonded in a state where a part of the element substrate 14 protrudes from the counter substrate 16. A driver IC 20 for driving the liquid crystal 18 is mounted on the protruding portion. The liquid crystal device 10 performs display in the display area 22 in which the liquid crystal 18 is sealed. The liquid crystal device 10 is a transmissive liquid crystal device.

  FIG. 2 is an enlarged plan view of the display area 22 of the liquid crystal device 10 according to the present embodiment. As shown in this figure, the liquid crystal device 10 has a large number of rectangular pixels 24R, 24G, and 24B corresponding to red, green, and blue (hereinafter, simply referred to as pixels 24 when the colors are not distinguished). Yes. The pixels 24 are arranged in a matrix, and all the colors of the pixels 24 arranged in a certain column are the same. In other words, the pixels 24 are arranged so that corresponding colors are arranged in a stripe pattern. A set of three adjacent pixels 24R, 24G, and 24B arranged in the row direction is the minimum unit (pixel) for display. The liquid crystal device 10 can display various colors in each pixel by adjusting the luminance balance of the pixels 24R, 24G, and 24B.

  A light shielding layer (black mask) 26 is disposed between adjacent pixels 24. The light blocking layer 26 plays a role of improving the contrast of display by blocking light leaking from between the pixels 24.

Next, a detailed configuration of the pixel 24 will be described with reference to FIG.
FIG. 3 is a schematic cross-sectional view showing a detailed configuration of the pixel 24 according to the present embodiment, and shows a state when the liquid crystal device 10 is cut along the column direction at a certain pixel 24.

  The element substrate 14 is configured with a glass substrate 28 as a base, and the counter substrate 16 is configured with a glass substrate 30 as a base. A TFT (Thin Film Transistor) element 32 is formed on the surface of the glass substrate 28 facing the glass substrate 30. More specifically, a gate electrode 32g, a gate insulating film 34, and a semiconductor layer 32a are stacked in this order on the glass substrate 28. A source electrode 32s is formed in the source region of the semiconductor layer 32a, and a drain region is formed in the drain region. Is formed with the drain electrode 32d partially overlapping. The source electrode 32s is connected to a data line (not shown). The TFT layer 32 is configured by the semiconductor layer 32a, the source electrode 32s, the drain electrode 32d, the gate electrode 32g, and the like.

On the TFT element 32, an interlayer insulating film 36 made of SiO ₂ or SiN is formed. The interlayer insulating film 36 may be further multilayered as necessary.

  On the interlayer insulating film 36, a pixel electrode 38 made of ITO having optical transparency is formed. The pixel electrode 38 is electrically connected to the drain electrode 32 d of the TFT element 32 through a contact hole provided through the interlayer insulating film 36. An alignment film (not shown) is formed on the pixel electrode 38. The element substrate 14 is composed of components from the glass substrate 28 to the alignment film.

  On the other hand, the glass substrate 30 which is the base of the counter substrate 16 is thinly polished. An overcoat 42 made of a resin having optical transparency is formed on the surface of the glass substrate 30 that faces the element substrate 14.

  A common electrode 44 made of ITO is formed on the overcoat 42. An alignment film (not shown) is formed on the common electrode 44. The counter substrate 16 is configured by components from the glass substrate 30 to the alignment film.

A TN mode liquid crystal 18 is disposed between the element substrate 14 and the counter substrate 16. The liquid crystal 18 changes the alignment direction according to the magnitude of the drive voltage applied between the pixel electrode 38 and the common electrode 44, and changes the polarization state of the transmitted light according to the alignment direction. Further, polarizing plates 46 and 48 disposed in parallel to the element substrate 14 and the counter substrate 16 are attached to the outside of the element substrate 14 and the counter substrate 16, respectively.
FIG. 4 is a diagram showing the directions of the optical axes of the polarizing plates 46 and 48 according to the present embodiment. In FIG. 4, arrows attached to the polarizing plates 46 and 48 indicate transmission axes. Thus, the polarizing plates 46 and 48 are disposed so that the transmission axes are orthogonal to each other.

  Returning to FIG. 3, the color filter 40 is formed outside the polarizing plate 48. The color filter 40 corresponds to the area of each pixel 24. The color filter 40 can change the transmitted light to a predetermined color (for example, red, green, or blue) by absorbing light having a specific wavelength in the incident light. A light shielding layer 26 made of black resin having a light shielding property is formed in a region between adjacent pixels 24.

  A surface light source device 50 as a surface light emitter is disposed at a position facing the polarizing plate 46. The surface light source device 50 is an edge light type. The light guide plate 52 is formed in a plate shape with a light transmissive material (for example, acrylic resin) having a high refractive index. On the lower surface of the light guide plate 52, a diffuse reflection layer 54 for diffusing and reflecting light is provided. The diffuse reflection layer 54 is for reducing the luminance unevenness and directivity of the surface light source device 50, and the surface roughness of the light guide plate 52 is increased by dot printing or the surface roughness is increased by cutting. The pattern changes in accordance with the distance from the fluorescent tube (cold cathode tube) 56. A fluorescent tube 56 is disposed on one side surface (incident side end surface) of the light guide plate 52, and a reflection sheet 58 is disposed from the outer periphery of the fluorescent tube 56 to the lower surface of the light guide plate 52. A diffusion plate 60 is provided on the upper surface (light exit surface) of the light guide plate 52.

  Light emitted from the fluorescent tube 56 enters the light guide plate 52 from the incident side end face. The light is confined in the light guide plate 52 and repeatedly reflected on the upper surface (light emission surface) and the lower surface (diffuse reflection layer 54) of the light guide plate 52, and light is incident when the incident angle with respect to the light emission surface becomes smaller than the critical angle of total reflection. The light is emitted from the emission surface and transmitted through the diffusion plate 60 to be emitted as uniform diffused light (Lambert light). The reflection sheet 58 efficiently guides the light from the fluorescent tube 56 to the light guide plate 52 and prevents light from being emitted from the lower surface of the light guide plate 52 so that 100% light can be extracted from the light emission surface. There is to do. Such an edge light type surface light source device 50 is suitable for thinning. The liquid crystal device 10 is a device that performs display using the polarization selection function of the polarizing plates 46 and 48 and the polarization conversion function of the liquid crystal 18.

  Here, the display principle of the liquid crystal device 10 will be described with reference to FIGS. 3 and 4. Incident light 62 incident from the surface light source device 50 passes through the element substrate 14 and enters the liquid crystal 18. Here, when the liquid crystal 18 is in the OFF state, the linearly polarized light transmitted through the polarizing plate 46 is converted into linearly polarized light orthogonal to the polarization by the optical rotation of the liquid crystal 18 and transmitted through the polarizing plate 48 to the observer. Visible. That is, when the liquid crystal 18 is in the OFF state, a bright display is performed. On the other hand, when the liquid crystal 18 is in the ON state, the linearly polarized light transmitted through the polarizing plate 46 is transmitted by the liquid crystal 18 without undergoing polarization conversion and is absorbed by the polarizing plate 48. That is, when the liquid crystal 18 is in the ON state, light is not transmitted to the observer side and dark display is performed.

  Thus, by disposing the color filter 40 between the polarizing plates 46 and 48, depolarization by the color filter 40 is eliminated, and the utilization efficiency of the surface light source device 50 can be improved. Thereby, the light quantity of the surface light source device 50 can be saved, and by extension, power consumption can be reduced.

(Manufacturing method of liquid crystal device)
Next, a method for manufacturing the liquid crystal device 10 will be described with reference to FIG.
FIG. 5 is a flowchart showing a method for manufacturing the liquid crystal device 10 according to the present embodiment. In FIG. 5, a process P <b> 11 and a process P <b> 12 are processes for manufacturing the element substrate 14, and a process P <b> 21 and a process P <b> 22 are processes for manufacturing the counter substrate 16. Process P31 to Process P34 are processes for manufacturing the liquid crystal device 10 by combining the element substrate 14 and the counter substrate 16. Process P11 and process P12 and process P21 and process P22 are performed independently, respectively.

  First, in step P11, a circuit element layer including the TFT element 32, various wirings, the interlayer insulating film 36, and the like is formed on the glass substrate 28.

  Next, in the process P12, the pixel electrode 38 is formed on the interlayer insulating film 36. Subsequent to the process P12, an alignment film is applied and a rubbing process is performed, and the element substrate 14 is completed through the processes P11 and P12.

  On the other hand, in step P21, an overcoat 42 is formed on the glass substrate 30. This step is performed using a spin coating method, a photolithography method, or the like.

  Next, in Step P22, the common electrode 44 is formed by being laminated on the overcoat 42. Following the process P22, alignment film application and rubbing are performed, and the counter substrate 16 is completed through the processes P21 and P22.

  In step P31, the element substrate 14 and the counter substrate 16 are bonded together. The bonding is performed by applying the sealing material 12 to the element substrate 14 or the counter substrate 16 and performing alignment (positioning), and then contacting and pressing the element substrate 14 and the counter substrate 16.

  In Step P32, the liquid crystal 18 is injected between the element substrate 14 and the counter substrate 16 from the opening (injection port) of the sealing material 12, and the injection port is sealed.

  In step P33, polarizing plates 46 and 48 are attached to the outside of the element substrate 14 and the counter substrate 16, respectively.

  In Step P <b> 34, the color filter 40 and the light shielding layer 26 are formed on the polarizing plate 48. This step is performed using a spin coating method, a photolithography method, or the like. Thereafter, the surface light source device 50 is appropriately attached to complete the liquid crystal device 10.

  The above is a manufacturing method in which the liquid crystal 18 is injected after bonding, but instead, the liquid crystal 18 is dropped onto the element substrate 14 or the counter substrate 16 before bonding, and then both substrates are bonded together. It can also be manufactured.

(Second Embodiment)
Next, a second embodiment will be described with reference to the drawings.
FIG. 6 is a schematic cross-sectional view showing a detailed configuration of the pixel 24 according to the present embodiment, and shows a state when the liquid crystal device 64 is cut along the column direction at a certain pixel 24. The liquid crystal device 64 of the present embodiment is a TFT active matrix transmission type liquid crystal device, similar to the liquid crystal device 10 according to the first embodiment, and is characterized by the color filter 40 and the polarizing plate 46. , 48. Accordingly, since the basic configuration of the liquid crystal device 64 of the present embodiment is the same as that of the liquid crystal device 10 of the first embodiment, common components are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.

  In the liquid crystal device 64 of this embodiment, as shown in FIG. 6, the color filter 40 is formed outside the polarizing plate 46. The color filter 40 corresponds to the area of each pixel 24. The color filter 40 can change the transmitted light to a predetermined color (for example, red, green, or blue) by absorbing light having a specific wavelength in the incident light. A glass substrate 28 which is a base of the element substrate 14 is thinly polished.

(Third embodiment)
Next, a third embodiment will be described with reference to the drawings.
FIG. 7 is a schematic cross-sectional view showing a detailed configuration of the pixel 24 according to the present embodiment, and shows a state when the liquid crystal device 66 is cut along the column direction at a certain pixel 24. The liquid crystal device 66 of the present embodiment is a TFT active matrix type transmissive liquid crystal device, similar to the liquid crystal device 10 according to the first embodiment, and is characterized by the color filter 40 and the polarizing plate 46. And the wire grid polarization element 68. Accordingly, since the basic configuration of the liquid crystal device 66 of the present embodiment is the same as that of the liquid crystal device 10 of the first embodiment, common components are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.

  In the liquid crystal device 66 of the present embodiment, as shown in FIG. 7, the color filter 40 is formed on the surface of the glass substrate 30 that is the base of the counter substrate 16 that faces the element substrate 14. The color filter 40 can change the transmitted light to a predetermined color (for example, red, green, or blue) by absorbing light having a specific wavelength in the incident light. A light shielding layer 26 made of black resin having a light shielding property is formed in a region between adjacent pixels 24. On the color filter 40, an overcoat 42 made of a resin having optical transparency is formed.

  On the overcoat 42, a wire grid polarization element 68 having a polarization separation function including a plurality of fine wires is formed. On the wire grid polarizing element 68, an insulating layer 69 made of a resin having optical transparency is formed.

  A common electrode 44 made of ITO is formed on the insulating layer 69. An alignment film (not shown) is formed on the common electrode 44. The counter substrate 16 is configured by components from the glass substrate 30 to the alignment film.

  The wire grid polarization element 68 is an optical element having a polarization separation function. This is an element with many conductor fine wires arranged at a pitch shorter than the wavelength of light, and reflects the component having the polarization axis parallel to the fine wires in the incident light and also polarized light perpendicular to the fine wires. It has the property of penetrating a component having an axis.

  FIG. 8 is a diagram illustrating the function of the wire grid polarizing element 68 according to the present embodiment. As shown in FIG. 8, the incident light 70 to the wire grid polarization element 68 has a component p having a polarization axis parallel to the fine wire and reflected by the wire grid polarization element 68 and having a polarization axis perpendicular to the fine wire. S passes through the wire grid polarization element 68. That is, the wire grid polarization element 68 has a polarization separation function, and can separate the incident light 70 into reflected light 70r and transmitted light 70t having different polarization states. In the incident light 70, a component having a polarization axis parallel to the fine wire is reflected by the wire grid polarization element 68, and a component having a polarization axis perpendicular to the fine wire is transmitted. As described above, according to the wire grid polarization element 68, the incident light 70 can be separated into the reflected light 70r and the transmitted light 70t having different polarization states. The polarizing plate 46 and the wire grid polarizing element 68 are arranged so that their transmission axes are orthogonal to each other.

  Here, the display principle of the liquid crystal device 66 will be described with reference to FIG. Incident light 62 incident from the surface light source device 50 passes through the element substrate 14 and enters the liquid crystal 18. Here, when the liquid crystal 18 is in the OFF state, the linearly polarized light transmitted through the polarizing plate 46 is converted into linearly polarized light orthogonal to the optical rotation of the liquid crystal 18 and transmitted through the wire grid polarizing element 68 for observation. Visible to the person. That is, when the liquid crystal 18 is in the OFF state, a bright display is performed. On the other hand, when the liquid crystal 18 is in the ON state, the linearly polarized light that has passed through the polarizing plate 46 passes through the liquid crystal 18 without undergoing polarization conversion, and is reflected by the wire grid polarizing element 68. That is, when the liquid crystal 18 is in the ON state, light is not transmitted to the observer side and dark display is performed.

  Since the liquid crystal device 66 having the above-described configuration includes the wire grid polarizing element 68 having the polarization separation function on the inner surface of the opposing substrate, the thinning can be realized and the parallax caused by the thickness of the substrate can be achieved. High-quality display can be performed.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to the drawings.
FIG. 9 is a schematic cross-sectional view showing a detailed configuration of the pixel 24 according to the present embodiment, and shows a state when the liquid crystal device 78 is cut along the column direction at a certain pixel 24. 10A and 10B are diagrams showing a surface light source device including a lens array sheet (converging lens) 80 of the liquid crystal device 78 according to the present embodiment, in which FIG. 10A is an exploded perspective view partly broken, and FIG. 10B is a lens. FIG. 10 is an operation explanatory diagram of the array sheet 80. The liquid crystal device 78 of the present embodiment is a TFT active matrix type transmissive liquid crystal device, similar to the liquid crystal device 10 according to the first embodiment, and is characterized by the convergence of incident light 62. . Accordingly, since the basic configuration of the liquid crystal device 78 of the present embodiment is the same as that of the liquid crystal device 10 of the first embodiment, common components are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.

  As shown in FIG. 9, the liquid crystal device 78 of the present embodiment is provided with a surface light source device 81 in which a lens array sheet 80 is disposed in front of the diffusion plate 60. In the surface light source device 81, the light converged by the lens array sheet 80 is converged to the pixel opening 82 of the liquid crystal device 78 as shown in FIG. In the liquid crystal device 78, an electrode such as a TFT and a wiring (black matrix portion) 84 for driving the TFT are provided on the inner surface of one glass substrate 28, and light transmission is performed on the inner surface of the other glass substrate 30. A liquid crystal material is sealed in a gap formed between the glass substrates 28 and 30. Further, polarizing plates 46 and 48 are disposed on the outer surfaces of the glass substrates 28 and 30. Accordingly, the liquid crystal device 78 has a pixel opening 82 surrounded by electrodes and wirings 84. Microlenses 86 are arranged on the lens array sheet 80 so as to correspond to the respective pixel openings 82 of the liquid crystal device 78, and as shown in FIG. The light R is prevented from being blocked by the electrodes of the liquid crystal device 78 and the wiring 84 by being converged in the pixel opening 82. Further, since the lens array sheet 80 converges the light incident on the micro lens 86 into the pixel opening 82 of the liquid crystal device 78, the distance between the micro lens 86 and the pixel opening 82 is larger than that of the glass substrate 28 or the micro lens 86. Is held by a light-transmitting material 88 having a small refractive index.

  The lens array sheet 80 can be manufactured by a so-called 2P method (Photo-Polymerization method). That is, an energy ray curable resin such as an ultraviolet curable resin is transferred to the surface of the substrate by a stamper on which a reverse pattern of the lens array sheet 80 is formed, and the resin is cured by irradiating energy rays such as ultraviolet rays through the substrate. Then, the lens array sheet 80 is formed with an energy ray curable resin.

  In this embodiment, the lens array sheet 80 is disposed on the element substrate 14 side with the pattern surface side facing the element substrate 14. The light (uniformly diffused light) emitted from the light guide plate 52 and passed through the diffusion plate 60 is incident on the lens array sheet 80, and is effectively converged into the pixel opening 82 of the liquid crystal device 78 by each microlens 86. The light passes through the pixel opening 82 of the liquid crystal device 78 without being blocked by the electrode or the wiring 84 of the device 78 (see FIG. 10B).

  According to this, the light incident on the liquid crystal device 78 is converged in the pixel opening 82 of the liquid crystal device 78 by the lens array sheet 80, and the light use efficiency becomes very high. Further, the front luminance of the liquid crystal device 78 is also improved. Furthermore, since the front luminance is improved, even when the liquid crystal device 78 having the same front luminance is configured, the power consumption of the surface light source device 81 can be reduced.

(Electronics)
FIG. 11 is a perspective view illustrating an example of an electronic apparatus according to the present embodiment. A cellular phone (electronic device) 100 illustrated in FIG. 11 includes the liquid crystal device of the above embodiment as a small-sized display unit 102, and includes a plurality of operation buttons 104, an earpiece 106, and a mouthpiece 108. Yes. Since the liquid crystal device of the above embodiment can smoothly perform the initial transition operation in the OCB mode in a short time with a low voltage, it is possible to provide the mobile phone 100 including the liquid crystal display unit with excellent display quality. .

  The liquid crystal device of each of the above embodiments is not limited to the electronic device described above, but an electronic book, a personal computer, a digital still camera, a liquid crystal television, a viewfinder type or a monitor direct view type video tape recorder, pager, electronic notebook, calculator, word processor. Can be used as an image display means for devices such as workstations, videophones, POS terminals, touch panels, etc., and is a high-speed response LCD for the purpose of supporting moving pictures on mobile phone LCDs and in-vehicle LCDs. In any electronic device such as a 3D liquid crystal display using a sequential (FS) display method, a two-screen liquid crystal display, and a light valve for a projection television, it is possible to obtain a bright and high contrast display quality. .

(Modification 1)
The liquid crystal device of the above embodiment is a transmissive liquid crystal device, but is not limited to this, and may be, for example, a reflective or transflective liquid crystal device.

(Modification 2)
In the above embodiment, the pixels 24 of the liquid crystal device have red, green, and blue pixels 24R, 24G, and 24B arranged in a stripe shape. Instead, the pixels 24 have a delta arrangement as shown in FIG. Also good. In this arrangement, the pixels 24R, 24G, and 24B are arranged so that the pixels 24R, 24G, and 24B are always included one by one regardless of how the three adjacent pixels 24 are selected in a triangular shape. Yes. Even with the liquid crystal device having such a configuration, depolarization by the color filter is eliminated, and high-quality display can be performed to improve the light utilization efficiency and increase the front luminance without increasing the power consumption of the surface light source device. .

(Modification 3)
The liquid crystal device of the above embodiment is of a normally white mode that performs bright display when the liquid crystal 18 is in the OFF state, but by appropriately changing the optical axes of the polarizing plates 46 and 48 and the wire grid polarizing element 68. A normally black mode device that performs dark display when the liquid crystal 18 is in an OFF state can also be used.

(Modification 4)
The mode of the liquid crystal 18 included in the liquid crystal device of the embodiment is not limited to the TN mode, but is IPS (In Plain Switching), FFS (Fringe Field Switching), VA (Vertical Alignment), and STN (Super Twisted Nematic). ) And the like can be employed. When using depolarization by the color filter, increasing the light utilization efficiency without increasing the power consumption of the surface light source device, and increasing the front luminance, among these modes, the wide viewing angle The resulting IPS, FFS, and VA are preferred. If the liquid crystal 18 is set to a mode in which a wide viewing angle is obtained, an image viewed at a viewing angle inclined from the front can be displayed with high brightness and high quality.

(Modification 5)
The color filter 40 provided outside the polarizing plate 46 or the polarizing plate 48 included in the liquid crystal device of the embodiment may be formed on a substrate disposed outside the polarizing plate 46 or the polarizing plate 48.

1 is a diagram illustrating a schematic configuration of a liquid crystal device according to a first embodiment. FIG. 3 is an enlarged plan view of a display area of the liquid crystal device according to the first embodiment. FIG. 3 is a schematic cross-sectional view illustrating a detailed configuration of a pixel according to the first embodiment. The figure which shows the direction of the optical axis of the polarizing plate which concerns on 1st Embodiment. 5 is a flowchart showing a method for manufacturing the liquid crystal device according to the first embodiment. FIG. 6 is a schematic cross-sectional view illustrating a detailed configuration of a pixel according to a second embodiment. FIG. 10 is a schematic cross-sectional view illustrating a detailed configuration of a pixel according to a third embodiment. The figure which shows the function of the wire grid polarizing element which concerns on 3rd Embodiment. FIG. 10 is a schematic cross-sectional view illustrating a detailed configuration of a pixel according to a fourth embodiment. The figure which shows the surface light source device provided with the lens array sheet of the liquid crystal device which concerns on 4th Embodiment. FIG. 11 is a perspective view illustrating an example of an electronic apparatus according to the embodiment. The figure which shows arrangement | positioning of the pixel of the liquid crystal device in a modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Liquid crystal device 12 ... Sealing material 14 ... Element board | substrate 16 ... Counter board | substrate (one board | substrate) 18 ... Liquid crystal (liquid crystal layer) 20 ... Driver IC 22 ... Display area 24 ... Pixel 26 ... Light-shielding layer (black mask) 28, 30 ... Glass substrate 32 ... TFT element 32a ... Semiconductor layer 32d ... Drain electrode 32g ... Gate electrode 32s ... Source electrode 34 ... Gate insulating film 36 ... Interlayer insulating film 38 ... Pixel electrode 40 ... Color filter 42 ... Overcoat 44 ... Common electrode 46 , 48 ... Polarizing plate 50 ... Surface light source device 52 ... Light guide plate 54 ... Diffuse reflective layer 56 ... Fluorescent tube (cold cathode tube) 58 ... Reflective sheet 60 ... Diffuser plate 62 ... Incident light 64, 66 ... Liquid crystal device 68 ... Wire grid Polarizing element 69 ... Insulating layer 70 ... Incident light 70r ... Reflected light 70t ... Transmitted light 78 ... Liquid crystal device 8 DESCRIPTION OF SYMBOLS ... Lens array sheet (convergence lens) 81 ... Surface light source device 82 ... Pixel opening 84 ... Wiring 86 ... Microlens 88 ... Light-transmitting material 100 ... Cell-phone (electronic device) 102 ... Display part 104 ... Operation button 106 ... Earpiece 108: Mouthpiece.

Claims (8)

A liquid crystal layer disposed between a pair of opposing substrates;
A polarizing plate disposed in parallel with the pair of substrates;
A color filter disposed on the opposite side of the liquid crystal layer across the polarizing plate;
A liquid crystal device comprising: The liquid crystal device according to claim 1,
The liquid crystal device, wherein the polarizing plate is disposed on a side opposite to the surface on the liquid crystal layer side of one of the pair of substrates. The liquid crystal device according to claim 2,
The liquid crystal device, wherein the color filter corresponds to a region of each pixel and is formed on a substrate outside the polarizing plate. The liquid crystal device according to claim 2 or 3,
The liquid crystal device, wherein the one substrate is thinly polished. The liquid crystal device according to any one of claims 2 to 4,
A surface light emitter disposed outside the color filter;
A converging lens for converging light emitted from the surface light emitter to the area of the pixel between the surface light emitter and the color filter;
A liquid crystal device further comprising: The liquid crystal device according to claim 1,
The polarizing plate is disposed on the liquid crystal layer side surface of one of the pair of substrates,
The liquid crystal device, wherein the color filter is disposed between the one substrate and the polarizing plate. The liquid crystal device according to claim 6,
The liquid crystal device, wherein the polarizing plate is a grid including a plurality of fine wires and having a polarization separation function.   An electronic apparatus comprising the liquid crystal device according to claim 1.

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