JP2006220711A - Liquid crystal device, substrate for liquid crystal device, and electronic appliance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal device which is bright in its reflective display and is excellent in contrast in its transmissive display, and also to provide a substrate for the liquid crystal device, and an electronic appliance equipped with the liquid crystal device. <P>SOLUTION: Because a width a of a first light shielding film 14a arranged between transmissive regions 12 of mutually adjacent subpixels 11 is larger than a width b of a second light shielding film 14b arranged between reflective regions 13 of mutually adjacent subpixels 11, color mixing is prevented and the contrast is improved by certainly separating the transmissive regions 12 of the mutually adjacent subpixels 11 from each other, with the first light shielding film 14a having the large width, and at the same time, the reflective display is made bright by suppressing reduction of reflected light, with the second light shielding film 14b having the small width in the reflective region 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electronic device such as a personal computer or a mobile phone, a liquid crystal device used in these electronic devices, and a substrate for a liquid crystal device.

  Conventionally, a liquid crystal device or the like is used as a display device of an electronic device such as a personal computer or a mobile phone. As this liquid crystal device, for example, a transflective type including a transmission region that transmits light and a reflection region that reflects light is known. The transflective liquid crystal device includes, for example, a plurality of pixels, and each pixel includes three sub-pixels each having a transmission region and a reflection region. These sub-pixels are formed by red (R), green (G), and blue (B) color filters, and a light-shielding film (black) is used between the sub-pixels to improve contrast ratio and prevent color mixing. (Matrix) is formed, but if the width of the light-shielding film is increased in order to prevent misalignment when the light-shielding film is formed or the opposing substrates are bonded together, the light-shielding film narrows the transmissive region, for example, thereby providing a bright display. There was a problem that it was not possible.

  In order to solve this problem, a light-shielding pattern that is not affected by the misalignment of the pair of substrates is provided along the data line at both edges of the data line on one substrate, and the opposing substrate is aligned with the data line. Thus, a technique for providing a light shielding film is disclosed. (For example, refer to Patent Document 1).

In addition, a reflective film made of, for example, aluminum is provided in the reflective area, and an aluminum film is provided between the sub-pixels in the transmissive area. The forming technique is also known.
Japanese Patent Laying-Open No. 2004-77544 (paragraph [0082], FIG. 7).

  However, in the technique of Patent Document 1 described above, for example, since the width of the light shielding film is the same between the transmission region and the reflection region, it is possible to reduce the width of the light shielding film in the transmission region in which the light amount is to be secured in the reflection region. If the contrast ratio is lowered and the contrast ratio is increased in the transmissive region by increasing the width of the light shielding film, the problem remains that the amount of light decreases in the reflective region.

  SUMMARY An advantage of some aspects of the invention is that it provides a liquid crystal device that is bright in reflective display and excellent in contrast with a reflective display, a substrate for the liquid crystal device, and an electronic device including the liquid crystal device. .

  In order to achieve the above object, a liquid crystal device according to a main aspect of the present invention includes a plurality of subpixels each including a pair of substrates that hold liquid crystal, a transmission region that transmits light, and a reflection region that reflects light. A pixel configured such that the transmission regions of adjacent sub-pixels are arranged in parallel via a light-shielding film and the reflection regions of adjacent sub-pixels are arranged in parallel via the light-shielding film. The first light-shielding film provided between the transmission regions of the adjacent sub-pixels, and the second light-shielding film provided between the reflection regions of the adjacent sub-pixels. The width of the first light shielding film is larger than the width of the second light shielding film.

  In the present invention, the light shielding film includes a first light shielding film provided between the transmission regions of adjacent subpixels, and a second light shielding film provided between the reflection regions of the adjacent subpixels. And the width of the first light-shielding film is larger than the width of the second light-shielding film, so that the transmission region of the adjacent sub-pixels is reliably separated by the wide first light-shielding film, thereby improving the contrast. In addition to being able to improve, the second light-shielding film having a narrow width in the reflection region can suppress the decrease in reflected light and brighten the reflective display.

  According to an aspect of the invention, the sub-pixel includes a reflective film provided in the reflective region, and an extending portion that extends from the reflective film so as to overlap the first light shielding film. It is characterized by that. As a result, the sub-pixel has the reflective film provided in the reflective region and the extending portion that extends from the reflective film so as to overlap the first light shielding film. By forming the mounting portion integrally, it can be easily manufactured and the manufacturing cost can be reduced.

  According to an embodiment of the present invention, the width of the first light shielding film is narrower than the width of the extending portion. As a result, the width of the first light shielding film is narrower than the width of the extending portion. For example, when the width of the first light shielding film is wider than the width of the extending portion, It is possible to prevent the color from changing due to the overlapping of the first light-shielding films.

  According to an embodiment of the present invention, a width between the first light shielding films in the transmission region is determined by the first light shielding film. Accordingly, since the width between the first light shielding films in the transmission region is determined by the first light shielding film, for example, the transmission region can be easily adjusted only by adjusting the width of the first light shielding film. Can do.

  According to an embodiment of the present invention, the first light shielding film is also provided in a part between the reflection regions of the adjacent sub-pixels. Thus, conventionally, for example, when the light shielding film provided between the transmission regions of the adjacent sub-pixels is not provided between the reflection regions of the adjacent sub-pixels, the extended portion is caused by a manufacturing error. Is exposed without being covered by the first light-shielding film, and light is reflected on the exposed extended portion to reduce the contrast. However, the first light-shielding light provided between the transmission regions of the adjacent sub-pixels is reduced. Since the film is also provided at a part between the reflection regions of the adjacent sub-pixels, it is possible to prevent a decrease in contrast by reliably covering the extending portion with the first light-shielding film.

  Here, “provided over a part” means that, for example, the extended portion is provided so as not to be exposed more than necessary to prevent color mixing even when a positional deviation due to a manufacturing error occurs during manufacturing of the liquid crystal device. Say.

  According to an aspect of the present invention, the liquid crystal is set to a first thickness in the transmissive region, and is set to a second thickness that is thinner than the first thickness in the reflective region, The first light-shielding film is provided between the adjacent sub-pixels up to a boundary between the liquid crystal having the first thickness and the liquid crystal having the second thickness. Thereby, the liquid crystal is set to the first thickness in the transmissive region, and is set to the second thickness that is thinner than the first thickness in the reflective region, and the first light shielding film is formed between adjacent sub-pixels. Between the first thickness liquid crystal and the second thickness liquid crystal, so that the extension portion is surely covered with the first light-shielding film to prevent a decrease in contrast. In addition, it is possible to prevent the optical path length of the light reflected by the transmission region and the reflection region from being different and lowering the contrast.

  According to one aspect of the present invention, at least one of the first and second light-shielding films is formed by stacking adjacent colored layers provided in adjacent sub-pixels. Features. Accordingly, at least one of the first and second light-shielding films is formed by stacking adjacent colored layers provided in the adjacent sub-pixels. Therefore, a coloring layer material for coloring The light shielding film can be manufactured by using as it is, thereby reducing the manufacturing process and reducing the cost.

  According to an embodiment of the present invention, the light shielding film is made of metal. Thereby, since the light shielding film is made of metal, the light shielding can be reliably performed as compared with, for example, the case where the material of the colored layer is used as it is.

  According to an aspect of the present invention, the light shielding film is formed of a black resin. Thereby, since the light shielding film is formed of black resin, light can be reliably shielded and contrast can be improved as compared with the case where the light shielding film is formed by overlapping the colored layers, for example.

  A substrate for a liquid crystal device according to another aspect of the present invention includes a plurality of subpixels each having a transmission region that transmits light and a reflection region that reflects light, and the transmission regions of adjacent subpixels are shielded from each other. The pixel includes a pixel that is arranged side by side through a film and the reflection regions of adjacent subpixels are arranged side by side through the light shielding film, and the light shielding film is a transmission region of the adjacent subpixel. A first light-shielding film provided between each other and a second light-shielding film provided between the reflective regions of the adjacent sub-pixels, and the width of the first light-shielding film is It is larger than the width of the second light shielding film.

  In the present invention, the light shielding film includes a first light shielding film provided between the transmission regions of adjacent subpixels, and a second light shielding film provided between the reflection regions of the adjacent subpixels. And the width of the first light-shielding film is larger than the width of the second light-shielding film, so that the transmission region of the adjacent sub-pixels is reliably separated by the wide first light-shielding film, thereby improving the contrast. In addition to being able to improve, the second light-shielding film having a narrow width in the reflection region can suppress the decrease in reflected light and brighten the reflective display.

  An electronic apparatus according to another aspect of the present invention includes the above-described liquid crystal device.

  In the present invention, since the liquid crystal device is provided with a reflective display, a bright transmissive display, and an excellent contrast, an electronic device having an excellent display performance can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, a liquid crystal device, specifically, an active matrix liquid crystal device using TFD (Thin Film Diode thin film diode), which is a reflective transflective two-terminal switching element, and the liquid crystal thereof. Although an electronic apparatus using the apparatus will be described, the present invention is not limited to this. Moreover, in the following drawings, in order to make each structure easy to understand, the actual structure and the scale and number of each structure are different.

  (First embodiment)

  1 is a schematic perspective view of a liquid crystal device according to a first embodiment of the present invention, FIG. 2 is a schematic plan view of a liquid crystal panel of the liquid crystal device of FIG. 1, and FIG. 3 is a cross-sectional view of the liquid crystal panel of FIG. 4 is a cross-sectional view taken along line BB of the liquid crystal panel of FIG. 2, and FIG. 5 is a cross-sectional view taken along line CC of the liquid crystal panel of FIG. In FIG. 2, a substrate on the side opposite to the substrate on which the colored layer described later is provided, a planarization film, a cell thickness adjusting layer, an alignment film, a scan electrode, and an alignment film on the substrate on which the colored layer is provided. Illustration is omitted.

  (Configuration of liquid crystal device)

  The liquid crystal device 1 includes, for example, a liquid crystal panel 2 and a circuit board 3 connected to the liquid crystal panel 2 as shown in FIG. Here, in addition to the circuit board 3, the liquid crystal device 1 is provided with a lighting device such as a backlight (not shown) and other incidental mechanisms as necessary.

  As shown in FIG. 1, the liquid crystal panel 2 includes a pair of substrates 5 and 6 bonded together with a sealant 4, and a TN (Twist Nematic) type liquid crystal 7 sealed in a gap between the substrates 5 and 6. And.

  For example, as shown in FIG. 1, the substrate 5 is provided with a plurality of pixels 10, which are minimum units for displaying characters and the like, arranged in the X direction and the Y direction. As shown in FIG. 2, the pixel 10 is formed by arranging, for example, three substantially rectangular sub-pixels 11 in parallel in the X direction via a first light shielding film 14a and a second light shielding film 14b described later. .

  As shown in FIG. 2, the sub-pixel 11 includes a substantially rectangular transmission region 12 that transmits light from a backlight (not shown) provided on the opposite side of the substrate 5 from the liquid crystal 7 side, and a substrate from the substrate 6 side. And a reflection region 13 having a substantially rectangular shape for reflecting light incident toward the side 5. The transmissive region 12 is provided next to the reflective region 13 in the Y direction. That is, the reflective region 13 is provided in the substantially upper half in the Y direction in FIG. 2, and the transmissive region 12 is provided in the substantially lower half in the Y direction in FIG. The plurality of sub-pixels 11 are provided such that transmission regions 12 (reflection regions 13) of adjacent sub-pixels 11 are adjacent to each other in the X direction via a first light-shielding film 14a and a second light-shielding film 14b described later. ing. The position and shape of the transmissive region 12 are not limited to this, and for example, the transmissive region may be provided at a plurality of locations.

  As shown in FIG. 3, a resin base layer 15 is provided on the surface of the substrate 5 on the liquid crystal 7 side. A plurality of concavo-convex portions are formed in the base layer 15, and a reflective film 16 is formed in a region that becomes the reflective region 13 on the surface of the base layer 15 on the liquid crystal 7 side. As shown in FIG. 5, the reflection film 16 is formed integrally with an extending portion 16 a extending in the Y direction so as to overlap a first light shielding film 14 a described later. For example, aluminum or an aluminum alloy is used as a constituent material of the reflective film 16. The reflective film 16 has an uneven shape that follows the uneven shape of the underlayer 15.

  As shown in FIG. 2, the extending portion 16 a extends from the reflective film 16 in the vicinity between the reflective regions 13 adjacent in the X direction to the transmissive region 12 side in the Y direction. The extending portion 16a is formed integrally with the reflective film 16, and aluminum or an aluminum alloy is used as a constituent material of the extending portion 16a, for example.

  On the liquid crystal 7 side such as the base layer 15 and the reflective film 16, red, green, and blue colored layers 17R, 17G, and 17B are formed for each sub-pixel 11 as shown in FIGS. Yes. As the colored layer material, for example, a photosensitive resin colored with a pigment can be used. A first light shielding film 14a and a second light shielding film 14b that shield light are formed between the adjacent colored layers 17R, 17G, and 17B.

  As shown in FIG. 2, the first light shielding film 14 a is provided between the transmission regions 12 of the adjacent subpixels 11, and the second light shielding film 14 b is formed between the reflection regions 13 of the adjacent subpixels 11. It is provided between. The width a of the first light shielding film 14a in the X direction is set to be larger than the width b of the second light shielding film 14b in the X direction. For example, as shown in FIG. 4, a green colored layer 17G is superimposed on a blue colored layer 17B to form a second light-shielding film 14b, and a green colored layer 17B is formed on the blue colored layer 17B as shown in FIG. The colored layer 17G is overlaid to form the first light shielding film 14a. The other first light-shielding film 14a and second light-shielding film 14b are similarly formed by overlapping adjacent colored layers 17R and 17G. The width a of the first light shielding film 14a is set to, for example, 8 μm to 10 μm, and the width b of the second light shielding film 14b is set to, for example, 2 μm to 3 μm. Here, the width a of the first light shielding film 14a needs to be set smaller than the width of the extending portion 16a, and the width of the extending portion 16a is set to 13.5 μm in consideration of positional deviation. Therefore, the width a of the first light shielding film 14a is preferably 13.5 μm or less. Further, when the first light shielding film 14a is formed by a method other than the lamination of the colored layers, the width a of the first light shielding film 14a can be made wider than the width of the extending portion 16a, but the luminance is lowered. Therefore, it is not preferable to increase the width from that point.

  The width a of the first light shielding film 14a is narrower than the width d of the extending portion 16a. As shown in FIG. 2, the extending portion 16 a determines the width of the transmissive region 12 in the X direction where the sub-pixels 11 are adjacent to each other. As shown in FIG. 2, the width c between the first light shielding films 14a in the X direction in which the sub-pixels 11 are adjacent is determined by the first light shielding film 14a. As shown in FIG. 2, the first light-shielding film 14 a is provided across a portion between the transmission regions 12 of the adjacent subpixels 11 and between the reflection regions 13 of the adjacent subpixels 11. The phrase “provided partly” means that, for example, the extended portion 16a is provided so as not to be exposed more than necessary to prevent color mixing even when a positional shift due to a manufacturing error occurs during the manufacture of the liquid crystal device 1. . Thus, the extended portion 16a extending from the reflective film 16 is reliably covered with the first light shielding film 14a in the boundary region between the transmissive region 12 and the reflective region 13. In addition, when importance is attached to the contrast, the first light shielding film 14a may be provided in a part between the reflection regions 13, and when importance is attached to the luminance, the second light shielding film 14b is provided between the transmission regions 12. It may be provided also in a part between. Since each colored layer 17R, 17G and 17B has a different light absorption rate, the colored layers 17R and 17G have, for example, a substantially circular hole 17r and a substantially elliptical shape as shown in FIGS. A hole 17g having a shape is formed. Thereby, for example, the brightness of the reflective display is improved.

  As shown in FIG. 2, a third light shielding film 14c is provided in the X direction at the boundary between the pixels 10 adjacent in the Y direction. The third light shielding film 14c is formed, for example, by stacking three layers of colored layers 17R, 17G, and 17B.

  Further, a flattening film 18 is provided on the liquid crystal 7 side such as the colored layers 17R, 17G, and 17B and the reflective film 16 as shown in FIG. 3, and on the liquid crystal 7 side of the flattening film 18 in the reflective region 13. A cell thickness adjusting layer 19 for adjusting the thickness of the liquid crystal 7 in the Z direction is provided. Accordingly, as shown in FIG. 3, the thickness h1 of the liquid crystal 7 in the transmissive region 12 in the Z direction is larger than the thickness h2 of the liquid crystal 7 in the reflective region 13 in the Z direction. The first light-shielding film 14a is provided to at least the boundary between the liquid crystal 7 having a thickness h1 and the liquid crystal 7 having a thickness h2. On the liquid crystal 7 side of the planarizing film 18 and the cell thickness adjusting layer 19, a scanning electrode 20 made of a transparent conductor such as ITO (Indium Tin Oxide) is formed in the X direction.

  An alignment film 21 made of, for example, a polyimide resin is formed on the scanning electrode 20, and a polarizing plate (not shown) is provided on the side opposite to the liquid crystal 7 side of the substrate 5.

  On the other hand, on the substrate 6, for example, as shown in FIG. 3, a plurality of pixel electrodes 22 arranged in a matrix on the surface on the liquid crystal 7 side, and a strip shape in a direction intersecting the scanning electrode 20 in the boundary region of each pixel electrode 22. 1, a pixel electrode 22 and a TFD 24 connected to the signal electrode 23 are disposed, and an alignment film 25 is formed on the liquid crystal 7 side of the pixel electrode 22 and the like. The pixel electrode 22 is formed of a transparent conductor such as ITO. Similarly to the substrate 5, a polarizing plate (not shown) is provided on the opposite side of the substrate 6 from the liquid crystal side.

  Here, the substrate 5 and the substrate 6 are plate-like members formed of a light-transmitting material such as glass or synthetic resin as shown in FIG. 1, for example, and the substrate 5 protrudes outward from the substrate 6 ( (Hereinafter referred to as “overhang portion”) 26.

  Next, as shown in FIG. 1, the overhang portion 26 includes a scan electrode wire 27 and a signal electrode wire 28 extending from the region where the scan electrode 20 and the signal electrode 23 are surrounded by the seal material 4 to the overhang portion 26, For example, a liquid crystal driving IC 29 for supplying a liquid crystal driving current to the electrode wirings 27 and 28 is provided.

  In addition, a plurality of electrode terminals (not shown) provided in the mounting region on the substrate 5 corresponding to the mounting surface of the liquid crystal driving IC 29 and the current from the circuit board 3 are supplied to the projecting portion 26 for liquid crystal driving. A plurality of input terminals (not shown) for input to the IC 29 are provided. The electrode terminals are connected to the scanning electrode wiring 27 and the signal electrode wiring 28, respectively.

  Further, the overhang portion 26 includes an external terminal (not shown) that receives current from the circuit board 3, an input wiring 30 that supplies current from the outside to the input terminal, and the like. The signal electrode 23 is made of a metal material such as Ta, Cr, or TaW.

  Next, the circuit board 3 is configured by forming and mounting a wiring pattern 32 or the like on a base substrate 31 as shown in FIG.

  Here, the base substrate 31 is a flexible film-like member, and the wiring pattern 32 is formed of, for example, copper or the like, and a terminal (not shown) is formed at the end on the overhang portion 26 side. This terminal is connected to an external terminal via, for example, an ACF.

  (Manufacturing method of liquid crystal device)

  Next, a method for manufacturing the liquid crystal device 1 will be described with reference to the drawings.

  FIG. 6 is a flowchart showing a manufacturing process of the liquid crystal device 1 of the first embodiment.

  First, the substrate 5 is washed and dried, and, for example, a positive photosensitive resin is applied to the substrate 5 to form an underlayer 15 having irregularities (S1).

  Next, aluminum is formed with a substantially constant thickness so as to cover the base layer 15 by sputtering or the like, and the reflective film is partially removed so that the extended portion 16a remains, for example, by etching, and a plurality of openings through which light can be transmitted are formed. The provided reflective film 16 is formed (S2).

  Next, a colored layer material is applied so as to cover the reflective film 16 and the base layer 15, prebaked, and exposed and developed by an exposure apparatus or the like (not shown), whereby the colored layers 17 R, 17 G, and 17 B are applied. And the first light shielding film 14a and the second light shielding film 14b are formed (S3). At this time, the width a in the X direction of the first light shielding film 14a is made larger than the width b in the X direction of the second light shielding film 14b as shown in FIG. A first light-shielding film 14a is provided over a portion between the reflection regions 13 of the adjacent sub-pixels 11 from between the regions 12. Here, “provided over a part” means that, for example, even when there is an alignment error when forming the first light shielding film 14a, the extended portion 16a is not exposed more than necessary to prevent color mixing. This means that the first light-shielding film 14a is provided. Note that the first light-shielding film 14a and the second light-shielding film 14b may be separately formed without being simultaneously formed.

  Next, a flattening film 18 is formed using a transparent photosensitive resin so as to cover the colored layer 17 and the reflective film 16, and the transparent photosensitive resin for adjusting the cell thickness is formed on the flattening film 18 that becomes the reflective region 13. Is applied to form a cell thickness adjusting layer 19 (S4). At this time, as shown in FIG. 3, the thickness h1 of the liquid crystal 7 in the transmissive region 12 in the Z direction is set to be larger than the thickness h2 of the liquid crystal 7 in the reflective region 13 in the Z direction. For example, in the transmissive region 12 and the reflective region 13, the thicknesses h1 and h2 are set so as to correct the optical path difference of the light transmitted through the liquid crystal 7 between the transmissive display and the reflective display.

  Subsequently, a thin film made of ITO is similarly formed and patterned on the planarizing film 18 and the cell thickness adjusting layer 19 so as to correspond to the colored layers 17R, 17G, and 17B, thereby forming the scanning electrode 20 (S5). Further, an alignment film 21 is formed so as to cover the scanning electrode 20, and a rubbing process is performed.

  On the other hand, the pixel electrode 22, the signal electrode 23, and the TFD 24 are formed on the substrate 6 facing the substrate 5, and an alignment film 25 is formed so as to cover the pixel electrode 22 and the like, and a rubbing process is performed (S6).

  Subsequently, the sealing material 4 is provided on the substrate 5 and the substrates 5 and 6 are bonded together (S7). At this time, the first light-shielding film 14a and the second light-shielding film 14b on the substrate 5 side are opposed to the boundary regions of the pixel electrodes 22 on the substrate 6 side.

  Then, for example, the liquid crystal 7 is injected from the injection port formed in the sealing material 4 to seal the injection port, a polarizing plate is provided outside the substrates 5 and 6, and the circuit board 3 is connected to the liquid crystal panel 2. Thus, the liquid crystal device 1 is manufactured (S8).

  This is the end of the description of the method for manufacturing the liquid crystal device 1.

  As described above, according to the present embodiment, the width a of the first light shielding film 14 a provided between the transmission regions 12 of the adjacent sub-pixels 11 is set between the reflection regions 13 of the adjacent sub-pixels 11. Since it is larger than the width b of the provided second light-shielding film 14b, the transmission regions 12 of the adjacent sub-pixels 11 are reliably separated by the first light-shielding film 14a having a large width, thereby preventing color mixing and improving the contrast. In addition to being able to improve, the second light-shielding film 14b having a narrow width in the reflective region 13 can suppress the decrease in reflected light and brighten the reflective display.

  4 and 5, the sub-pixel 11 has a reflective film 16 in the reflective region 13, and the extending portion 16a is integrally formed from the reflective film 16 so as to overlap the first light shielding film 14a. Since it is extended, for example, the liquid crystal device 1 can be easily manufactured and the manufacturing cost can be reduced as compared with the case where the reflective film 16 and the extended portion 16a are separately manufactured.

  Furthermore, since the width a of the first light shielding film 14a is narrower than the width d of the extending portion 16a, for example, even if the position of the first light shielding film 14a is shifted due to an error in manufacturing the first light shielding film 14a, The colored layer 17R or the like does not protrude into the transmissive region 12 of adjacent sub-pixels of different colors, and as a result, it is possible to prevent the color of transmissive display from changing. Further, for example, when the width a of the first light shielding film 14a is wider than the width d of the extending portion 16a, the colored layer 17R and the like forming the first light shielding film 14a are formed in the transmission regions 12 of adjacent sub-pixels of different colors. It is possible to prevent the color from protruding and changing.

  Furthermore, since the width c between the first light shielding films 14a in the X direction in which the sub-pixels 11 are adjacent is determined by the first light shielding film 14a, for example, the width c in the X direction in which the sub-pixels 11 are adjacent to each other. Can be easily adjusted only by adjusting the width a of the first light-shielding film 14a.

  Further, conventionally, for example, when the light shielding film provided between the transmission regions 12 of the adjacent subpixels 11 is not provided between the reflection regions of the adjacent subpixels, due to an error in manufacturing. The extended portion 16a is exposed without being covered with the first light shielding film 14a, and the external light is reflected on the exposed extended portion 16a and the contrast is lowered. However, the first light shielding film 14a is adjacent to the adjacent light shielding film 14a. The extended portion 16a is surely covered with the first light-shielding film 14a because it is provided over a part between the reflective regions 13 of the adjacent sub-pixels 11 from between the transmissive regions 12 of the pixel 11. Thus, it is possible to prevent the optical path length of the light reflected by the extending portion 16a exposed in the transmissive region 12 and the reflective film 16 in the reflective region 13 from being different, and to prevent a decrease in contrast.

  Further, the thickness h1 of the liquid crystal 7 in the transmissive region 12 in the Z direction is larger than the thickness h2 of the liquid crystal 7 in the reflective region 13, and at least the first light-shielding film 14a is thicker than the liquid crystal 7 having the thickness h1. Since the h2 is provided up to the boundary with the liquid crystal 7, it is possible to prevent the decrease in contrast by reliably covering the extending portion 16a with the first light shielding film 14a.

  Further, since the first light shielding film 14a and the second light shielding film 14b are formed by stacking, for example, colored layers 17R and 17G that form the adjacent subpixels 11, colored layers 17R and 17G for coloring. The first light shielding film 14a and the second light shielding film 14b can be manufactured by using the materials 17 and 17B as they are, and the manufacturing process can be reduced and the cost can be reduced.

  (Second Embodiment)

  Next, a liquid crystal device according to a second embodiment of the present invention will be described. In addition, in embodiment after this embodiment, the same code | symbol is attached | subjected to the same structural member as the said embodiment, the description is abbreviate | omitted, and it demonstrates centering on a different location.

  FIG. 7 is a cross-sectional view in the reflection region of the liquid crystal panel of the liquid crystal device of the second embodiment, and FIG. 8 is a cross-sectional view in the transmission region of the liquid crystal panel of the liquid crystal device of the second embodiment.

  In the above embodiment, an example in which the colored layers 17R, 17G, and 17B and the reflective film 16 are provided on the same substrate 5 has been described. However, in the present embodiment, the colored layers 17R, 17G, and 17B are disposed on the substrate 6 side. Is provided. That is, on the liquid crystal 7 side of the planarizing film 18, as shown in FIGS. 7 and 8, for example, a plurality of pixel electrodes 22 arranged in a matrix and a band shape extending in the Y direction in the boundary region between the pixel electrodes 22. A plurality of signal electrodes (not shown), a pixel electrode 22 and a TFD (not shown) connected to the signal electrodes are arranged, and an alignment film 21 is formed on the liquid crystal 7 side such as the pixel electrode 22. The pixel electrode 22 is formed of a transparent conductor such as ITO.

  On the other hand, on the liquid crystal 7 side of the substrate 6, colored layers 17R, 17G, and 17B are formed for each sub-pixel 42 as shown in FIGS. A first light shielding film 14a and a second light shielding film 14b that shield light are formed between the adjacent colored layers 17R, 17G, and 17B.

  As shown in FIG. 8, the first light shielding film 14a is provided between the transmission regions 44 of the adjacent sub-pixels 42 so as to face the extending portion 16a, and the second light shielding film 14b is formed as shown in FIG. As shown in FIG. 3, the reflective regions 43 of the adjacent sub-pixels 42 are provided opposite to the boundary region of the adjacent pixel electrodes 22. As shown in FIGS. 7 and 8, the width a in the X direction of the first light shielding film 14a is larger than the width b in the X direction of the second light shielding film 14b. For example, as shown in FIG. 7, a green colored layer 17G is overlaid on a blue colored layer 17B to form a second light-shielding film 14b, and a green colored layer 17B is formed on the blue colored layer 17B as shown in FIG. The colored layer 17G is overlaid to form the first light shielding film 14a. The other first light-shielding film 14a and second light-shielding film 14b are similarly formed by overlapping adjacent colored layers 17R and 17G. Also in this embodiment, the width a of the first light shielding film 14a is set to, for example, 8 μm to 10 μm, and the width b of the second light shielding film 14b is set to, for example, 2 μm to 3 μm.

  The width a of the first light shielding film 14a is narrower than the width d of the extending portion 16a as shown in FIG. As shown in FIG. 8, the extending portion 16a determines the width of the transmission region 44 in the X direction where the sub-pixels 42 are adjacent to each other. As shown in FIG. 8, the first light shielding film 14a determines the width c between the first light shielding films 14a in the X direction where the sub-pixels 42 are adjacent to each other. Similar to the first embodiment, the first light-shielding film 14a is provided over a portion between the transmission regions 44 of the adjacent sub-pixels 42 and between the reflection regions 43 of the adjacent sub-pixels 42. It has been. Thereby, in the boundary region between the transmissive region 44 and the reflective region 43, the extended portion 16a extending from the reflective film 16 is surely opposed to the first light shielding film 14a.

  Further, a flattening film 48 is provided on the liquid crystal 7 side of the colored layers 17R, 17G, and 17B, as shown in FIGS. 7 and 8, and the liquid crystal 7 side of the flattening film 48 in the reflective region 43 is provided on the liquid crystal 7 side. 7 is provided with a cell thickness adjusting layer 49 for adjusting the thickness in the Z direction. As a result, as shown in FIG. 7, the thickness h1 of the liquid crystal 7 in the transmissive region 44 in the Z direction is larger than the thickness h2 of the liquid crystal 7 in the reflective region 43 in the Z direction. The first light-shielding film 14a is provided at least up to the boundary between the liquid crystal 7 having a thickness h1 and the liquid crystal 7 having a thickness h2 as in the above embodiment. On the liquid crystal 7 side of the planarizing film 48 and the cell thickness adjusting layer 49, a scanning electrode 20 made of a transparent conductor such as ITO (Indium Tin Oxide) is formed in the X direction.

  An alignment film 25 made of, for example, a polyimide resin is formed on the scanning electrode 20, and a polarizing plate (not shown) is provided on the side of the substrate 6 opposite to the liquid crystal 7 side.

  Further, similarly to the above-described embodiment, the transmission region 44 is provided next to the reflection region 43 in the Y direction. The plurality of sub-pixels 42 are provided such that transmission regions 44 (reflection regions 43) of adjacent sub-pixels 42 are adjacent to each other in the X direction via the first light-shielding film 14a and the second light-shielding film 14b. Yes.

  As described above, according to the present embodiment, the width a of the first light shielding film 14a is larger than the width b of the second light shielding film 14b as shown in FIGS. By reliably separating the regions 12 from each other by the wide first light-shielding film 14a, color mixing can be prevented and contrast can be improved, and the reflected light can be reflected by the second light-shielding film 14b having a narrow width in the reflective region 13. It is possible to make the reflection display brighter by suppressing the decrease of. As in the present embodiment, the present invention can be applied to liquid crystal devices having a variety of configurations as in the case where the colored layers 17R, 17G, and 17B serving as color filters are provided on the substrate 6 side.

  (Third embodiment)

  FIG. 9 is a cross-sectional view in the reflection region of the liquid crystal panel of the liquid crystal device of the third embodiment, and FIG. 10 is a cross-sectional view in the transmission region of the liquid crystal panel of the liquid crystal device of the third embodiment.

  In the above-described embodiment, the example in which the first light-shielding film 14a and the second light-shielding film 14b are formed by overlapping the adjacent colored layers 17R, 17G, and 17B is shown, but in the present embodiment, the colored layers 17R, 17G, and The first light-shielding film 55a and the second light-shielding film 55b shown in FIGS. 9 and 10 are provided on the substrate 6 instead of the substrate 5 side on which 17B is provided. The first light-shielding film 55a and the second light-shielding film 55b are boundaries formed by the adjacent colored layers 17R, 17G, and 17B between the pixel electrodes 22 provided in plurality on the substrate 6, for example, the colored layer 17R and the colored layer. It is provided so as to face the boundary with 17G. The first light-shielding film 55a and the second light-shielding film 55b are formed, for example, by overlapping three layers of metal films or red, green, and blue coloring materials used in the first embodiment.

  The liquid crystal device 50 according to the present embodiment includes a plurality of pixels 51 that are a minimum unit provided in the X direction and the Y direction, and the pixel 51 includes, for example, a first light shielding film 55a and a second light shielding film. Three are formed in parallel in the X direction via the film 55b.

  The sub-pixel 52 includes a reflection region 53 that reflects light incident from the substrate 6 side toward the substrate 5 side, and a transmission region 54 that transmits light from a backlight (not shown). The transmissive region 54 is provided next to the reflective region 53 in the Y direction, as in the above embodiment. The plurality of sub-pixels 52 are provided such that the transmission regions 54 (reflection regions 53) of the adjacent sub-pixels 52 are adjacent to each other in the X direction via the first light-shielding film 14a (second light-shielding film 14b). ing.

  As shown in FIG. 9, a base layer 15 is provided on the surface of the substrate 5 on the liquid crystal 7 side, and a plurality of uneven portions are formed in the base layer 15. A reflective film 16 is formed in a region to be the reflective region 53 on the surface of the base layer 15 on the liquid crystal 7 side as shown in FIG. As shown in FIG. 10, the reflective film 16 is formed integrally with an extending portion 16a extending in the Y direction so as to face the first light shielding film 55a and the second light shielding film 55b.

  Colored layers 17R, 17G, and 17B are formed adjacent to each other on the liquid crystal 7 side such as the base layer 15 and the reflective film 16.

  Further, a planarizing film 18 is provided on the liquid crystal 7 side of the colored layers 17R, 17G, and 17B, and a cell thickness adjusting layer 19 is provided on the liquid crystal 7 side of the planarizing film 18 in the reflective region 53. . As a result, as shown in FIG. 10, the thickness h1 of the liquid crystal 7 in the transmissive region 54 in the Z direction is thicker than the thickness h2 of the liquid crystal 7 in the reflective region 13 in the Z direction. On the liquid crystal 7 side of the planarizing film 18 and the cell thickness adjusting layer 19, a scanning electrode 20 made of a transparent conductor such as ITO is formed in the X direction.

  An alignment film 21 made of, for example, a polyimide resin is formed on the scanning electrode 20, and a polarizing plate (not shown) is provided on the side opposite to the liquid crystal 7 side of the substrate 5.

  On the other hand, on the substrate 6, for example, as shown in FIG. 9, a plurality of pixel electrodes 22 arranged in a matrix on the surface on the liquid crystal 7 side, and a strip shape in a direction intersecting the scanning electrode 20 in the boundary region of each pixel electrode 22. A plurality of signal electrodes (not shown) extending to the pixel electrode 22 and a pixel electrode 22 and a TFD (not shown) connected to the signal electrodes are disposed. Further, between the pixel electrodes 22, for example, the first light-shielding film 55a and the second light-shielding film 55a are formed on the surface of the substrate 6 on the liquid crystal 7 side so as to face the boundary between the colored layer 17R and the colored layer 17G along the Y direction. A light shielding film 55b is provided.

  The first light-shielding film 55a is provided so that the width a in the X direction is larger than the width b in the X direction of the second light-shielding film 55b as shown in FIGS. As shown in FIG. 10, the width a of the first light shielding film 55a is larger than the width b of the second light shielding film 55b as shown in FIG. As shown in FIG. 10, the width a of the first light shielding film 55a is narrower than the width d of the extending portion 16a. As shown in FIG. 10, the extending portion 16a determines the width c of the transmissive region 54 in the X direction where the sub-pixels 52 are adjacent to each other. The first light-shielding film 55 a is provided over a part between the transmission regions 54 of the adjacent sub-pixels 52 and between the reflection regions 53 of the adjacent sub-pixels 52. Thereby, in the boundary region between the reflective region 53 and the transmissive region 54, the extended portion 16a extended from the reflective film 16 surely faces the first light shielding film 55a.

  An alignment film 25 is formed on the liquid crystal 7 side such as the pixel electrode 22, the first light-shielding film 55a, and the second light-shielding film 55b.

  As described above, according to the present embodiment, the first light shielding film 55a and the second light shielding film 55b are provided on the substrate 6 so as to face the boundary formed by the adjacent colored layers 17R, 17G, and 17B. In addition, since the width a of the first light shielding film 55a is larger than the width b of the second light shielding film 55b, the contrast is improved by reliably separating the transmission regions 54 of the adjacent sub-pixels 52 from each other. In addition, the reflection display 53 can be brightened by suppressing the decrease of the reflected light by the first light shielding film 55a in the reflection region 53. The present invention can be applied to liquid crystal devices having various configurations as in the present embodiment. Further, for example, by forming the first light-shielding film 55a on the substrate 6 while forming the colored layers 17R, 17G, and 17B on the substrate 5, the manufacturing time of the liquid crystal device can be reduced and the manufacturing time can be shortened. .

  Further, when the first light-shielding film 55a and the second light-shielding film 55b are metal films, for example, as in the first embodiment, the first light-shielding film 14a and Compared with the case where the second light shielding film 14b is formed, the light can be reliably shielded, and a high contrast display can be obtained.

  (Fourth Embodiment / Electronic Device)

  Next, an electronic apparatus according to the fourth embodiment of the present invention including the above-described liquid crystal device 1 will be described.

  FIG. 11: is a schematic block diagram of the whole structure of the display control system of the electronic device concerning the 4th Embodiment of this invention.

  The electronic device 300 includes, for example, a liquid crystal panel 2 and a display control circuit 390 as a display control system as shown in FIG. 11, and the display control circuit 390 includes a display information output source 391, a display information processing circuit 392, a power supply circuit 393, and the like. A timing generator 394 and the like are included.

  The liquid crystal panel 2 has a drive circuit 361 including a liquid crystal drive IC 29 for driving the display area I.

  The display information output source 391 includes a memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory), a storage unit such as a magnetic recording disk or an optical recording disk, and a tuning circuit that tunes and outputs a digital image signal. It has. Further, the display information output source 391 is configured to supply display information to the display information processing circuit 392 in the form of a predetermined format image signal or the like based on various clock signals generated by the timing generator 394.

  The display information processing circuit 392 includes various well-known circuits such as a serial-parallel conversion circuit, an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, and a clamp circuit, and executes processing of input display information to display the image. Information is supplied to the drive circuit 361 together with the clock signal CLK. The power supply circuit 393 supplies a predetermined voltage to each component described above.

  As described above, according to the present embodiment, since the liquid crystal device 1 is provided which is bright in reflective display and bright in transmissive display and excellent in contrast, an electronic apparatus having excellent display performance can be obtained.

  Specific electronic devices include mobile phones, personal computers, digital cameras, etc., as well as touch panels equipped with liquid crystal devices, projectors, liquid crystal televisions, viewfinder type, monitor direct view type video tape recorders, car navigation systems, pagers, Examples include electronic notebooks, calculators, word processors, workstations, videophones, POS terminals, and the like. Needless to say, for example, the above-described liquid crystal device 1 or the like is applicable as a display unit of these various electronic devices.

  Note that the electronic apparatus of the present invention is not limited to the above-described example, and it is needless to say that various modifications can be made without departing from the gist of the present invention. Moreover, you may combine said each embodiment in the range which does not change the summary of this invention.

  For example, the TFD type liquid crystal device 1 and the like have been described in the above-described embodiment, but the present invention is not limited to this. For example, a TFT (Thin Film Transistor) active matrix type or passive matrix type liquid crystal device may be used. Further, the present invention may be applied to various liquid crystal devices such as an electronic device provided with a touch panel.

  In the first embodiment and the like, the first light-shielding film 14a and the second light-shielding film 14b are formed by stacking coloring materials. However, the light-shielding film is made of a black resin containing carbon or the like. You may make it make it. Thereby, for example, compared with the case where the first light-shielding film 14a and the second light-shielding film 14b are formed by overlapping the colored layers, light can be shielded more reliably and the contrast can be improved.

  Furthermore, in the first embodiment, an example in which the third light shielding film 14c formed by stacking three layers of the colored layers 17R, 17G, and 17B is provided at a position that is a boundary in the Y direction of each pixel 10 is provided. Although shown, instead of the third light shielding film 14c, for example, a metal light shielding film may be provided on the surface of the substrate 6 on the liquid crystal 7 side. Even in this way, the pixels 10 adjacent in the Y direction can be reliably separated, and a high contrast display can be obtained.

1 is a schematic perspective view of a liquid crystal device according to a first embodiment of the present invention. It is a schematic plan view of the liquid crystal panel of the liquid crystal device of FIG. It is AA sectional drawing of the liquid crystal panel of FIG. It is BB sectional drawing of the liquid crystal panel of FIG. It is CC sectional drawing of the liquid crystal panel of FIG. 4 is a flowchart illustrating a manufacturing process of the liquid crystal device according to the first embodiment. It is sectional drawing in the reflective area | region of the liquid crystal panel of the liquid crystal device of 2nd Embodiment. It is sectional drawing in the permeation | transmission area | region of the liquid crystal panel of the liquid crystal device of 2nd Embodiment. It is sectional drawing in the reflective area | region of the liquid crystal panel of the liquid crystal device of 3rd Embodiment. It is sectional drawing in the permeation | transmission area | region of the liquid crystal panel of the liquid crystal device of 3rd Embodiment. It is a schematic block diagram of the display control system of the electronic device of 4th Embodiment which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 40, 50 ... Liquid crystal device, 2 ... Liquid crystal panel, 10, 41 ... Pixel, 11, 42 ... Sub-pixel, 12, 44 ... Transmission region, 13, 43 ... Reflection region, 14a, 55a ... 1st light shielding film , 14b, 55b ... second light shielding film, 16a ... extending portion, 300 electronic equipment

Claims (11)

A pair of substrates for holding liquid crystal;
A plurality of sub-pixels each having a transmissive region that transmits light and a reflective region that reflects light, wherein the transmissive regions of adjacent sub-pixels are arranged side by side through a light-shielding film and the adjacent sub-pixels A plurality of the reflective regions are arranged side by side through the light shielding film,
The light-shielding film has a first light-shielding film provided between the transmission regions of the adjacent sub-pixels and a second light-shielding film provided between the reflection regions of the adjacent sub-pixels. The width of the first light shielding film is larger than the width of the second light shielding film. The subpixel includes a reflective film provided in the reflective region;
The liquid crystal device according to claim 1, further comprising: an extending portion that extends from the reflective film so as to overlap the first light shielding film.   The liquid crystal device according to claim 2, wherein a width of the first light shielding film is narrower than a width of the extending portion.   4. The liquid crystal device according to claim 1, wherein a width between the first light shielding films in the transmission region is determined by the first light shielding film. 5. .   The said 1st light shielding film is provided also in a part between reflective areas of the said adjacent sub pixel, The Claim 1 characterized by the above-mentioned. Liquid crystal device. The liquid crystal is set to a first thickness in the transmissive region, and is set to a second thickness that is thinner than the first thickness in the reflective region;
The first light shielding film is provided between the adjacent sub-pixels up to a boundary between the liquid crystal having the first thickness and the liquid crystal having a second thickness. The liquid crystal device according to any one of claims 1 to 4.   7. At least one of the first and second light shielding films is formed by stacking adjacent colored layers provided in the adjacent subpixels. The liquid crystal device according to any one of the above.   The liquid crystal device according to claim 1, wherein the light shielding film is made of metal.   The liquid crystal device according to claim 1, wherein the light shielding film is formed of a black resin. A plurality of sub-pixels each having a transmissive region that transmits light and a reflective region that reflects light, wherein the transmissive regions of adjacent sub-pixels are arranged side by side through a light-shielding film and the adjacent sub-pixels Comprising the pixels configured such that the reflective regions are arranged in parallel via the light shielding film,
The light-shielding film includes a first light-shielding film provided between the transmission regions of the adjacent sub-pixels and a second light-shielding film provided between the reflection regions of the adjacent sub-pixels. And a width of the first light shielding film is larger than a width of the second light shielding film.   An electronic apparatus comprising the liquid crystal device according to any one of claims 1 to 9.

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