JP2003107461A - Electro-optical device, color filter substrate and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electro-optical device and a color filter substrate capable of ensuring both brightness of reflective display and saturation of transmissive display when used in a display device capable of performing both reflective display and transmissive display. SOLUTION: A reflective layer 212 having an aperture 212a for each pixel is formed on a first substrate 211, and a colored layer 214 for constituting a color filter is formed thereon. A surface protection layer 215 is formed on the colored layer 214, and a transparent 216 is formed further thereon. The colored layer 214 is constituted so as to cover the aperture 212a in a two-dimensional direction, but overlaps only a part of a reflection surface in the pixel in a two-dimensional direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electro-optical device, a color filter substrate and an electronic device, and more particularly to a technique suitable as a structure of a color electro-optical device having a reflective layer.

[0002]

2. Description of the Related Art Conventionally, a reflective transflective liquid crystal display panel has been known in which both a reflective display utilizing external light and a transmissive display utilizing illumination light such as a backlight can be visually recognized. ing. This reflective semi-transmissive liquid crystal display panel has a reflective layer for reflecting external light in the panel, and the reflective layer is configured to be able to transmit illumination light such as a backlight. For this type of reflective layer,
Some liquid crystal display panels are provided with an opening (slit) having a predetermined area for each pixel.

FIG. 20 is a schematic cross-sectional view showing a schematic structure of a conventional reflective / semi-transmissive liquid crystal display panel 100. The liquid crystal display panel 100 includes a substrate 101 and a substrate 1.
No. 02 and No. 02 are bonded together by the sealing material 103, and the substrate 1
A liquid crystal 104 is enclosed between 01 and the substrate 102.

A reflective layer 111 having an opening 111a and a reflective portion 111b for each pixel is formed on the inner surface of the substrate 101, and the colored layers 112r, 11 are provided on the reflective layer 111.
A color filter 112 including 2g, 112b and a surface protection layer 112p is formed. Color filter 11
The transparent electrode 113 is formed on the surface of the second surface protection layer 112p.

On the other hand, the transparent electrode 1 is formed on the inner surface of the substrate 102.
21 is formed so as to intersect with the transparent electrode 113 on the opposing substrate 101. The substrate 1
On 01 or on the substrate 102, an alignment film, a hard transparent film, or the like is appropriately formed as necessary.

A retardation plate (1/4 wavelength plate) 105 and a polarizing plate 106 are sequentially arranged on the outer surface of the substrate 102, and a retardation plate (1/4 wavelength plate) is disposed on the outer surface of the substrate 101. ) 107 and the polarizing plate 108 are sequentially arranged.

The liquid crystal display panel 1 constructed as described above
When 00 is installed in an electronic device such as a mobile phone or a portable information terminal, the backlight 00 is installed with the backlight 109 disposed behind it. In the liquid crystal display panel 100, the reflection path R is used in a bright place such as daytime or indoors.
After the external light is transmitted through the liquid crystal 104 along the
Since the light is reflected at b and is transmitted through the liquid crystal 104 again to be emitted, the reflective display is visually recognized. On the other hand, in a dark place such as at night or outdoors, by lighting the backlight 109, the opening portion 111 of the illumination light of the backlight 109 is turned on.
The light passing through the liquid crystal display panel 1 is transmitted along the transmission path T.
Since it is emitted after passing through 00, the transmissive display is visible.

[0008]

However, in the above-mentioned conventional reflective / semi-transmissive liquid crystal display panel 100,
In the reflection path R, light passes through the color filter 112 twice, whereas in the transmission path T, light passes through the color filter 112 only once. Therefore, the brightness of the reflection display is higher than that of the transmission display. However, there is a problem that the saturation in the transmissive display becomes worse than that in the reflective display. That is, since the display brightness tends to be insufficient in the reflective display, the color filter 11
It is necessary to set the light transmittance of No. 2 high to secure the brightness of the display, but if this is done, it becomes impossible to obtain sufficient saturation in the transmissive display.

Further, since the number of times light passes through the color filter is different between the reflective display and the transmissive display as described above, the color of the reflective display and the color of the transmissive display are significantly different from each other. There is also a problem that it gives a feeling of strangeness.

Therefore, the present invention is to solve the above-mentioned problems, and the problem thereof is that when used in a display device capable of both reflective display and transmissive display, the brightness and transmissive display of the reflective display are improved. An object of the present invention is to provide a color filter substrate capable of ensuring display saturation as well. Another object of the present invention is to provide a reflective semi-transmissive electro-optical device capable of ensuring both the brightness of reflective display and the saturation of transmissive display. Further, it is an object of the present invention to realize a display technique capable of reducing the difference in color between reflective display and transmissive display.

[0011]

In order to solve the above-mentioned problems, the present inventor constructed a colored layer so that the colored layer overlaps only part of the reflective layer in a planar manner, and the colored layer on the other part of the reflective layer. It was found that the brightness of the reflected light reflected by the reflective layer can be ensured by configuring so that they do not overlap.

In particular, in the case of a reflective semi-transmissive electro-optical device, a reflective layer having an optical aperture is provided and then a colored layer is at least partially overlapped with the optical aperture. By configuring the colored layer to overlap only part of the reflective layer, it is possible to improve the saturation of the transmissive display while ensuring the brightness of the reflective display.

More specifically, the color layer is set to a predetermined color density in advance so that a transmissive display can be favorably obtained in the state where the color layer is superposed on the optical aperture. The brightness of the reflective display can be ensured by adjusting the ratio of overlapping with the reflective layer.

The electro-optical device of the present invention includes an electro-optical material layer (for example, a liquid crystal layer) disposed between a pair of substrates, and one of the pair of substrates and the electro-optical material layer. A colored layer, and a reflective layer having a reflection portion and an opening for reflecting light that has passed through the electro-optical material layer and the coloring layer, and the coloring layer is arranged on the opening. It is characterized in that it is arranged only on a part of the reflecting portion.

According to the present invention, since the colored layer is arranged on the opening and only on a part of the reflecting portion, the reflected light is reflected depending on the overlapping ratio of the colored layer to the reflecting layer. While it is possible to adjust the brightness, such adjustment is independent of the overlapping state of the colored layer and the optical aperture, so that the color of transmitted light can be prevented from being affected. . Therefore, the influence of the colored layer on the reflected light and the influence of the colored layer on the transmitted light can be set independently of each other.

Here, the ratio of the area of the reflecting portion overlapping the colored layer to the area of the reflecting layer (hereinafter, simply referred to as "reflection coloring ratio") is the same as that of the coloring layer with respect to the area of the opening. It is preferably smaller than the ratio of the areas of the overlapping openings (hereinafter, simply referred to as "transmissive coloring ratio"). Since the reflected light is transmitted through the colored layer twice, the transmitted light passing through the optical aperture is transmitted through the colored layer only once. Therefore, the brightness of the reflected light is normally lower than that of the transmitted light. Is less than the saturation of the reflected light, but the brightness of the reflected light can be increased and the saturation of the transmitted light is relatively improved by making the reflection coloring ratio smaller than the transmission coloring ratio. It is possible to reduce the color difference between the reflected light and the transmitted light.

Further, it is preferable that the colored layer is arranged so as to completely cover the opening. Since the colored layer is arranged so as to completely cover the optical aperture,
The saturation of transmitted light can be further increased.

Here, the reflective layer and the colored layer may be disposed on one of the pair of substrates, and the reflective layer may be one of the pair of substrates. In some cases, the colored layer is disposed on the upper side, and the colored layer is disposed on the other substrate of the pair of substrates. In any case, the same optical effect can be obtained optically.

Further, it is preferable that the colored layer is arranged so as to project from above the opening to above the reflecting portion around the opening. By arranging the colored layer so as to project from the opening to the surrounding reflection part,
It is possible to form the colored layer as one body.
Therefore, it is not necessary to form the pattern of the colored layer so finely, and it is possible to manufacture the colored layer more easily and with a high yield.

In another electro-optical device of the present invention, an electro-optical material layer disposed on a plurality of pixels, a colored layer disposed on each of the pixels, and a colored layer disposed on each of the pixels. A reflective layer having a reflective portion and an opening for reflecting light that has passed through the electro-optical material layer and the colored layer,
The colored layer is arranged on the opening,
It is characterized in that it is arranged only on a part of the reflecting portion.

According to the present invention, in the plurality of pixels, the coloring layer is arranged on the opening and only on a part of the reflecting portion, so that the overlapping ratio of the coloring layer with respect to the reflecting layer can be improved. Accordingly, the brightness of the reflected light can be adjusted for each pixel, but since such adjustment is independent of the overlapping state of the colored layer and the optical aperture, the color of the transmitted light is not affected. You can choose not to give. Therefore, the influence of the colored layer on the reflected light and the influence of the colored layer on the transmitted light can be set independently for each pixel.

Here, in each of the pixels, a ratio of an area of a portion of the reflective portion that overlaps the colored layer with respect to an entire area of the reflective portion is such that the opening portion that overlaps the colored layer with respect to an entire area of the opening portion. It is preferable that the ratio is smaller than the area ratio of the portion. Since the reflected light is transmitted through the colored layer twice, the transmitted light passing through the optical aperture is transmitted through the colored layer only once. Therefore, the brightness of the reflected light is normally lower than that of the transmitted light. Is less saturated than the reflected light,
By making the reflection coloring ratio smaller than the transmission coloring ratio,
The brightness of the reflected light can be increased for each pixel, the saturation of the transmitted light can be relatively improved, and the difference in color between the reflected light and the transmitted light can be reduced for each pixel. .

Further, it is preferable that the colored layer is arranged so as to completely cover the opening. Since the colored layer is arranged so as to completely cover the optical aperture,
The saturation of transmitted light can be further increased.

In addition, a pair of substrates sandwiching the electro-optical material layer may be provided, and the reflective layer and the colored layer may be disposed on one of the pair of substrates. The layer may be disposed on one of the pair of substrates, and the colored layer may be disposed on the other substrate of the pair of substrates. In any case, the same optical effect can be obtained optically.

Further, in each of the pixels, it is preferable that the colored layer is arranged so as to project from above the opening to above the reflecting portion around the opening. According to this, since the colored layer can be provided for each pixel so as to have an integrated structure which projects from the region overlapping the opening in plan view onto the surrounding reflective layer, the pattern of the colored layer is formed so finely. Therefore, it is possible to manufacture it more easily and with a high yield.

In a different electro-optical device of the present invention, the pair of display electrodes, the electro-optical material layer disposed between the pair of display electrodes, and the pair of display electrodes are overlapped in a plane. A plurality of pixels arranged corresponding to a region, a coloring layer arranged in each of the pixels, and light passing through the electro-optical material layer and the coloring layer arranged in each of the pixels. It is characterized in that the colored layer is provided on the opening and at the same time, the colored layer is provided on the opening.

In this case, the areas of the openings corresponding to each of the plurality of pixels are substantially the same, and the area of the colored layer corresponding to at least one of the plurality of pixels is The area of the colored layer corresponding to the plurality of pixels is preferably different.

Further, another electro-optical device of the present invention comprises an electro-optical material layer arranged on a plurality of pixels, and a plurality of kinds of colored layers having different colors arranged on the pixels. A reflective layer disposed on each of the pixels, the reflective layer having a reflection portion that reflects light that has passed through the electro-optical material layer and the colored layer, and an opening portion, wherein the colored layer has the opening portion and the reflective portion. It is characterized in that it is disposed on the upper side, and at least one of the plurality of types of colored layers is disposed only on a part of the reflective portion.

In the present invention, it is preferable that the area of the opening of the reflective layer is the same between the pixels having the colored layers of different colors. By configuring the pixels having the colored layers of different colors with different areas of the opening of the reflective layer to have the same amount of incident light in the pixels of each color, the color adjustment of the transmissive display can be relatively performed. It can be done easily. In addition, since the area of the reflective portion is the same in the pixels having the colored layers of different colors, it is easy to adjust the area of the colored layer on the reflective portion for each color when performing the color adjustment of the reflective display. Become.

In the present invention, it is preferable that the coating area ratio of the colored layer on the reflective portion (equivalent to the above-mentioned reflective coloring ratio) is different between the pixels having the colored layers of at least two different colors. . Thereby, the optical characteristics of the colored layers of the respective colors are adjusted so as to optimize the color of the transmissive display realized by the light transmitted through the openings, and the coverage of the colored layers of the respective colors overlapping with the reflective portion is adjusted. This makes it possible to optimize the color of the reflective display. Therefore, the color of transmissive display and the color of reflective display can be adjusted independently for each color.

In the present invention, it is preferable that the colored layers of red, green, and blue are provided, and the coverage of the green colored layer is smaller than the coverage of the red and blue colored layers. . The transmissive display is composed of light that has been transmitted through the colored layer only once in the region overlapping the opening, whereas the reflective display is mainly composed of light that is transmitted through the colored layer twice in the region overlapping the reflective portion. In addition, the light reflected by the colored layer in the region overlapping the opening is also affected. Therefore, in general, the reflective display has higher saturation than the transmissive display, but tends to be dark. By the way, since the relative luminous efficiency has a peak in the wavelength region of yellow-green, it becomes dark as the saturation of red and blue light increases, whereas it becomes difficult to become dark even if the saturation of green light is increased. As a result, if it is attempted to increase the brightness in the reflective display, the saturations of red and blue are likely to decrease. Therefore, in the pixels of red and blue, the saturation is ensured by increasing the coverage area ratio (that is, eliminating or reducing the area of the reflective portion that does not overlap the colored layer).
For green pixels, lower the coverage percentage (ie,
By increasing the amount of reflected light by increasing the area of the reflective portion that does not overlap the colored layer), it is possible to significantly increase the brightness while ensuring the color reproducibility of reflective display.

In the present invention, it is preferable that the covering area ratio of the green colored layer is 30 to 50%, and the covering area ratio of the red and blue colored layers is 60 to 100%. By setting the green coverage area ratio and the red and blue coverage area ratios within the above ranges, it is possible to improve the color reproducibility and brightness of the reflective display while ensuring the color reproducibility of the transmissive display. In particular, the coverage of the green colored layer is 35 to 4
5%, the coverage of the red and blue colored layers is 85 to 1
The most preferable range is 00%.

In the present invention, it is preferable that the reflecting portion is arranged around the entire circumference of the opening. As a result, the opening is formed in the reflective layer so as to be surrounded by the reflective portion, so that even if some positional misalignment occurs between the colored layer and the reflective layer, it is covered with the colored layer. It is possible to prevent a non-existing region from occurring in the opening. In particular, it is desirable that the opening be formed substantially in the center of the reflective layer.

In the present invention, the aperture ratio of the opening to the reflective layer is preferably 30 to 70%. Generally, when the aperture ratio of the reflective layer is large, the transmissive display is bright, but on the contrary, the reflective display is dark. Therefore, it is necessary to set the aperture ratio of the reflective layer so as to balance the transmissive display and the reflective display. More specifically, if the aperture ratio is too small, it is necessary to increase the illuminance of the backlight, which increases the power consumption of the backlight. On the other hand, if the aperture ratio is too large, the reflective display becomes dark and it becomes difficult to visually recognize it. In this embodiment, since the brightness of the reflective display can be obtained by providing a region that does not overlap with the colored layer in a part of the reflective portion, compared to the case where the structure in which the colored layer is laminated on the entire reflective layer is adopted. Thus, it becomes possible to balance the transmissive display and the reflective display in the above range where the aperture ratio is large, and good color quality can be realized in both the transmissive display and the reflective display. If the aperture ratio is less than the above range, the power consumption increases because it is necessary to secure the brightness of the transmissive display, and thus it becomes difficult to adopt it in a mobile electronic device such as a mobile phone. Also,
When the aperture ratio exceeds the above range, it becomes difficult to achieve both lightness and saturation in reflective display, and it becomes difficult to secure color quality in reflective display.

An electronic apparatus according to the present invention is characterized by having any one of the above electro-optical devices and a control means for controlling the electro-optical devices. In particular, an electronic device including a liquid crystal display device capable of color display as an electro-optical device, for example, a mobile phone, a portable information terminal, an image pickup device having a liquid crystal display function, or the like can be given. As a result, when the electro-optical device is used as the display unit of the electronic device, it is possible to reduce the color difference between the reflective display and the transmissive display and realize high display quality.

It should be noted that the reflective display and the transmissive display each have a coloring mode suitable for each color, and it is sufficient if a separate color filter can be provided for each.
In reality, both displays must be realized with a common color filter. In the present invention, by mutually changing the reflection coloring ratio and the transmission coloring ratio as described above,
Even if the coloring layer is common, it is possible to separately set the coloring mode of the reflective display and the coloring mode of the transmissive display.

Next, the color filter substrate of the present invention includes a substrate, a reflective layer disposed on the substrate, having a reflective portion for reflecting light and an opening, and a colored layer disposed on the substrate. And the colored layer is disposed on the opening and only on a part of the reflective portion.

According to the present invention, since the colored layer is arranged on the opening and only on a part of the reflective portion, the reflected light is reflected depending on the overlapping ratio of the colored layer to the reflective layer. While it is possible to adjust the brightness,
Since such adjustment is irrelevant to the overlapping state of the colored layer and the optical aperture, it is possible to prevent the color of transmitted light from being affected. Therefore, the influence of the colored layer on the reflected light and the influence of the colored layer on the transmitted light can be set independently of each other.

Here, the ratio of the area of the reflective portion where the colored layer is disposed to the total area of the reflective portion is defined as the area of the opening where the colored layer is disposed relative to the total area of the opening. It is preferable that the ratio is smaller than the ratio. Since the reflected light is transmitted through the colored layer twice, the transmitted light passing through the optical aperture is transmitted through the colored layer only once. Therefore, the brightness of the reflected light is normally lower than that of the transmitted light. Is less than the saturation of the reflected light, but the brightness of the reflected light can be increased for each pixel by making the reflection coloring ratio smaller than the transmission coloring ratio, and the saturation of the transmitted light is relatively The difference in color between the reflected light and the transmitted light can be reduced for each pixel.

Further, it is preferable that the colored layer is arranged so as to completely cover the target opening. By disposing the coloring layer so as to completely cover the optical aperture, the saturation of the transmitted light can be further increased.

Further, it is preferable that the colored layer is arranged so as to project from above the opening to above the reflecting portion around the opening. By disposing the coloring layer so as to project from the opening to the surrounding reflecting portion, it is possible to form the coloring layer as an integral body. Therefore, it is not necessary to form the pattern of the colored layer so finely, and it is possible to manufacture the colored layer more easily and with a high yield.

Another color filter substrate of the present invention is a substrate on which pixels are set, a colored layer arranged on the substrate according to the pixels, and a coloring layer arranged on the substrate according to the pixels, A reflecting layer that reflects light and a reflecting layer having an opening, wherein the coloring layer is arranged on the opening and at least a part of the reflecting portion. .

According to the present invention, since the colored layer is arranged on the opening and only on a part of the reflecting portion, the reflected light is reflected depending on the overlapping ratio of the colored layer to the reflecting layer. While it is possible to adjust the brightness for each pixel, such adjustment is independent of the overlapping state of the colored layer and the optical aperture, so that the color of transmitted light should not be affected. be able to. Therefore, the influence of the colored layer on the reflected light and the influence of the colored layer on the transmitted light can be set independently of each other.

Here, the ratio of the area of the reflective part where the colored layer is arranged to the total area of the reflective part is the ratio of the area of the opening where the colored layer is arranged to the total area of the opening. It is preferably smaller than. Since the reflected light is transmitted through the colored layer twice, the transmitted light passing through the optical aperture is transmitted through the colored layer only once. Therefore, the brightness of the reflected light is normally lower than that of the transmitted light. Is less than the saturation of the reflected light, but the brightness of the reflected light can be increased for each pixel by making the reflection coloring ratio smaller than the transmission coloring ratio, and the saturation of the transmitted light is relatively The difference in color between the reflected light and the transmitted light can be reduced for each pixel.

Further, it is preferable that the colored layer is arranged so as to completely cover the opening. Since the colored layer is arranged so as to completely cover the optical aperture,
The saturation of transmitted light can be further increased.

Further, it is preferable that the colored layer is arranged so as to project from above the opening to above the reflecting portion around the opening. By disposing the coloring layer so as to project from the opening to the surrounding reflecting portion, it is possible to form the coloring layer as an integral body. Therefore, it is not necessary to form the pattern of the colored layer so finely, and it is possible to manufacture the colored layer more easily and with a high yield.

Next, another color filter substrate of the present invention comprises a substrate on which pixels are set, and a plurality of types of colored layers having different colors, which are arranged on the substrate according to the pixels. A reflective layer disposed on the substrate according to the pixel, the reflective layer having a reflection portion for reflecting light and an opening portion; and the colored layer disposed on the opening portion and the reflection portion, and At least one of the colored layers of the kind of colored layers is disposed only on a part of the reflective portion.

In the present invention, it is preferable that the area of the opening of the reflective layer is the same between the pixels having the colored layers of different colors. By configuring the pixels having the colored layers of different colors with different areas of the opening of the reflective layer to have the same amount of incident light in the pixels of each color, the color adjustment of the transmissive display can be relatively performed. It can be done easily. In addition, since the area of the reflective portion is the same in the pixels having the colored layers of different colors, it is easy to adjust the area of the colored layer on the reflective portion for each color when performing the color adjustment of the reflective display. Become.

Further, it is preferable that a coverage area ratio of the colored layer on the reflective portion is different between the pixels having the colored layers of at least two different colors. Thereby, the optical characteristics of the colored layers of the respective colors are adjusted so as to optimize the color of the transmissive display realized by the light transmitted through the openings, and the coverage of the colored layers of the respective colors overlapping with the reflective portion is adjusted. This makes it possible to optimize the color of the reflective display. Therefore, the color of transmissive display and the color of reflective display can be adjusted independently for each color.

In this case, it is preferable that the colored layers of red, green and blue are provided, and the coverage of the colored layers of green is smaller than the coverage of the colored layers of red and blue. . The transmissive display is composed of light that has been transmitted through the colored layer only once in the region overlapping the opening, whereas the reflective display is mainly composed of light that is transmitted through the colored layer twice in the region overlapping the reflective portion. In addition, the light reflected by the colored layer in the region overlapping the opening is also affected. Therefore, in general, the reflective display has higher saturation than the transmissive display, but tends to be dark. By the way, since the relative luminous efficiency has a peak in the wavelength region of yellow-green, it becomes dark as the saturation of red and blue light increases, whereas it becomes difficult to become dark even if the saturation of green light is increased. As a result, if it is attempted to increase the brightness in the reflective display, the saturations of red and blue are likely to decrease. Therefore, in the red and blue pixels, the saturation is ensured by increasing the coverage area ratio (that is, by eliminating or reducing the area of the reflection part that does not overlap the colored layer), and in the green pixel. If the amount of reflected light is increased by lowering the coating area ratio (that is, increasing the area of the reflective portion that does not overlap the colored layer), the color reproducibility of the reflective display is ensured and the lightness is significantly increased. It will be possible.

Further, it is preferable that the covering area ratio of the green colored layer is 30 to 50%, and the covering area ratio of the red and blue colored layers is 60 to 100%. By setting the green coverage area ratio and the red and blue coverage area ratios within the above ranges, it is possible to improve the color reproducibility and brightness of the reflective display while ensuring the color reproducibility of the transmissive display. In particular, it is most preferable that the coverage of the green colored layer is in the range of 35 to 45%, and the coverage of the red and blue colored layers is in the range of 85 to 100%.

Further, it is preferable that the reflecting portion is arranged around the entire circumference of the opening. As a result, the opening is formed in the reflective layer so as to be surrounded by the reflective portion, so that even if some positional misalignment occurs between the colored layer and the reflective layer, it is covered with the colored layer. It is possible to prevent a non-existing region from occurring in the opening. In particular,
It is desirable that the opening be formed substantially in the center of the reflective layer.

Further, it is preferable that the aperture ratio of the opening to the reflective layer is 30 to 70%. Generally, when the aperture ratio of the reflective layer is large, the transmissive display is bright, but on the contrary, the reflective display is dark. Therefore, it is necessary to set the aperture ratio of the reflective layer so as to balance the transmissive display and the reflective display. More specifically, if the aperture ratio is too small,
It is necessary to increase the illuminance of the backlight, which increases the power consumption of the backlight. On the other hand, if the aperture ratio is too large, the reflective display becomes dark and it becomes difficult to visually recognize it. In the present embodiment, since the brightness of the reflective display can be obtained by providing a region that does not overlap with the colored layer in a part of the reflective portion, when adopting a structure in which the colored layer is stacked on the entire reflective layer, Compared with a case where a colored layer having different optical characteristics is formed in the portion overlapping the reflective portion and the portion overlapping the opening, it is possible to balance the transmissive display and the reflective display in the above range where the aperture ratio is large. Good color quality can be realized in both transmissive display and reflective display. If the aperture ratio is less than the above range, the power consumption increases because it is necessary to secure the brightness of the transmissive display, and thus it becomes difficult to adopt it in a mobile electronic device such as a mobile phone. If the aperture ratio exceeds the above range, it becomes difficult to achieve both brightness and saturation in reflective display, and it becomes difficult to secure color quality in reflective display.

[0054]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of an electro-optical device, a color filter substrate and an electronic apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment] FIG. 1 shows a liquid crystal panel 200 constituting an electro-optical device according to the first embodiment of the present invention.
2 (a) is a schematic cross-sectional view of the liquid crystal panel 200, and FIG. 2 (b) is an enlarged partial plan view of a color filter substrate 210 forming the liquid crystal panel 200. Is.

This electro-optical device includes a liquid crystal panel 2 having a so-called reflective / semi-transmissive passive matrix structure.
00, an illuminating device such as a backlight and a front light, a case body, and the like, which are not shown, are appropriately attached to the display device 00.

As shown in FIG. 1, the liquid crystal panel 200 is
Transparent first substrate 211 made of glass plate, synthetic resin plate, or the like
And a counter substrate 220 having a similar second substrate 221 facing the color filter substrate 210 as a base.
And the liquid crystal 232 are pasted together via the sealing material 230, the liquid crystal 232 is injected into the inside of the sealing material 230 from the injection port 230a, and then the cell structure is sealed by the sealing material 231.

A plurality of parallel stripe-shaped transparent electrodes 216 are formed on the inner surface of the first substrate 211 (the surface facing the second substrate 221), and a plurality of parallel stripe-shaped transparent electrodes 216 are formed on the inner surface of the second substrate 221. A transparent electrode 222 is formed. The transparent electrode 216 is conductively connected to the wiring 218A, and the transparent electrode 222 is conductively connected to the wiring 228. The transparent electrodes 216 and the transparent electrodes 222 are orthogonal to each other, and the intersecting regions form a large number of pixels arranged in a matrix, and these pixel arrangements are arranged in the liquid crystal display region A.
Are configured.

The first substrate 211 has a substrate projecting portion 210T projecting outside the outer shape of the second substrate 221,
The wiring 218A, the wiring 218B conductively connected to the wiring 228 via the vertical conduction portion formed of a part of the sealing material 230, and the wiring 218A are independently formed on the substrate extension 210T. An input terminal portion 219 including a plurality of wiring patterns is formed. Also, the substrate overhanging portion 2
A semiconductor IC 261 including a liquid crystal drive circuit and the like is mounted on the 10T so as to be conductively connected to the wirings 218A and 218B and the input terminal portion 219.
In addition, a flexible wiring board 263 is mounted on the end of the board extension 210T so as to be conductively connected to the input terminal portion 219.

In this liquid crystal panel 200, as shown in FIG. 2, a retardation plate (1/4) is provided on the outer surface of the first substrate 211.
A wavelength plate) 240 and a polarizing plate 241 are arranged, and a retardation plate (1/4 wavelength plate) 250 and a polarizing plate 251 are arranged on the outer surface of the second substrate 221.

<Structure of Color Filter Substrate 210> Next, the structure of the color filter substrate 210 will be described in detail with reference to FIGS. 2 (a) and 2 (b). A reflective layer 212 is formed on the surface of the first substrate 211, and an opening 212a is provided for each pixel. Of this reflective layer 212,
A portion other than the opening 212a is a reflecting portion 212b that substantially reflects light. In the case of this embodiment, a reflective layer 212 having an opening 212a and a reflective portion 212b is formed for each pixel. However, the reflective layer 212 may be formed over the entire liquid crystal display area A, and only the opening 212a may be formed for each pixel.

A colored layer 214 is formed on the reflective layer 212, and a surface protective layer (overcoat layer) 215 made of a transparent resin or the like is coated on the colored layer 214. This colored layer 214
The surface protection layer 215 forms a color filter.

The coloring layer 214 is usually made to have a predetermined color tone by dispersing a coloring material such as a pigment or a dye in a transparent resin. As an example of the color tone of the coloring layer, there is a color filter having a combination of three colors of R (red), G (green) and B (blue) as a primary color filter, but the color tone is not limited to this, and a complementary color system Can be formed in various color tones. Usually, a colored resist having a predetermined color pattern is formed by applying a colored resist made of a photosensitive resin containing a coloring material such as a pigment or a dye on the surface of a substrate and removing unnecessary portions by a photolithography method. Here, when forming a colored layer of a plurality of color tones, the above steps are repeated.

As an arrangement pattern of the colored layers, FIG.
Although the stripe arrangement is adopted in the illustrated example shown in (b), various pattern shapes such as a delta arrangement and a diagonal mosaic arrangement can be adopted in addition to the stripe arrangement. Further, a light-shielding film (black matrix or black mask) for shielding light in the inter-pixel region can be formed as a part of the colored layer around each of the RGB colored layers.

On the surface protection layer 215, a transparent electrode 2 made of a transparent conductor such as ITO (indium tin oxide) is formed.
16 are formed. The transparent electrode 216 is formed in a strip shape extending in the vertical direction in FIG. 2B, and a plurality of transparent electrodes 216 are arranged in parallel with each other to form a stripe shape. An alignment film 217 made of polyimide resin or the like is formed on the transparent electrode 216.

In the present embodiment, as shown in FIG. 2B, the colored layer 214 constituting the color filter is planarly overlapped so as to completely cover the opening 212a of the reflective layer 212 in each pixel. And the opening 21
2a toward the periphery from the area that overlaps with 2a in plan view.
It is integrally formed so as to project onto the reflecting portion 212b around the periphery 12a.

The colored layer 214 is not formed over the entire pixels, but is formed so as to overlap only a part of the reflective layer 212. That is, in the reflective layer 212, a region that overlaps the colored layer 214 in a plane (an inner peripheral region facing the opening 212a in the illustrated example) and a region that does not overlap the colored layer 214 in a plane (an outer peripheral region in the illustrated example). Exists.

On the other hand, in the liquid crystal panel 200, a counter substrate 220 facing the color filter substrate 210.
Is a layer in which a transparent electrode 222 similar to the above, a hard protective film 223 made of SiO ₂ or TiO ₂ , and an alignment film 224 similar to the above are sequentially laminated on a second substrate 221 made of glass or the like.

In the present embodiment configured as described above, a part of the external light incident on the reflecting portion 212b from the counter substrate 220 side passes through the colored layer 214 and then the reflecting portion 212b.
Part of the light is reflected by the reflection part 212b without passing through the colored layer 214, and is again transmitted through the counter substrate 220 and emitted. At this time, external light that passes through the colored layer 214 passes through the colored layer 214 twice, but external light that does not pass through the colored layer 214 exits without passing through the colored layer 214.
Therefore, the brightness of the reflective display can be improved as compared with the case where the colored layer 214 covers the entire reflective layer 212 in the pixel.

On the other hand, since the colored layer 214 completely covers the opening 212a of the reflective layer 212, for example, when a backlight or the like is arranged behind the color filter substrate 210 and illumination light is emitted from the back, A part of the illumination light passes through the opening 212a and the coloring layer 214, and the liquid crystal 2
The light passes through 32 and the counter substrate 220 and is emitted. Therefore, since the transmitted light is transmitted through the colored layer 214 only once, the color of the transmissive display according to the color density of the colored layer 214 (the degree to which the spectral distribution in the visible light region is biased when light is transmitted). Is obtained. At this time, the saturation of the reflected light is reduced because the reflected light component that does not pass through the colored layer is included as described above, so that the saturation of the transmissive display is relatively increased.

In this embodiment, the optical characteristics of the colored layer 214 are formed so as to correspond to the transmissive display, and the colored layer 214 is formed.
By adjusting the reflection area of the reflection part 212b that overlaps in a plane, it is possible to secure the color of the reflection type display, especially the brightness. Therefore, it is possible to increase the saturation of the transmissive display while ensuring the brightness of the reflective display. It is also possible to reduce the difference in color (particularly, saturation and lightness) between the reflective display and the transmissive display.

The above-described effect is obtained by forming the colored layer to have a substantially uniform color density (for example, the density of the coloring material such as a pigment or a dye is substantially uniform) as in the ordinary color filter manufacturing process. In addition, it is particularly suitable when the colored layer is formed to have a substantially uniform thickness as a whole. In this case, the optical characteristics of the region of the colored layer 214 that overlaps the opening 212a in a plane and the region of the colored layer 214 that overlaps the reflection part 212b in a plane substantially match, so that the conventional structure has a reflective display. The effect of the present invention is particularly remarkable because a large difference in saturation and lightness is inevitably generated between the color of (1) and the color of the transmissive display.

The reflective type display and the transmissive type display each have a coloring mode suitable for each color, and it suffices that a separate color filter can be provided for each, but in reality, a common color filter is used for both. It is preferable in terms of manufacturing to realize the display of. In the present embodiment, the reflection coloring ratio and the transmission coloring ratio are mutually changed as described above, so that the coloring mode of the reflective display and the coloring mode of the transmissive display are separately set even if the coloring layer is common. It became possible to do.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. 3 (a) and 3 (b). In the liquid crystal panel 300 of this embodiment, the same first substrate 311, second substrate 321, and
Coloring layer 314, surface protection layer 315, transparent electrode 316, alignment film 317, transparent electrode 322, hard protection film 323, alignment film 324, sealing material 330, liquid crystal 332, retardation plate 34.
Since it has 0,350 and polarizing plates 341,351,
Description of these is omitted.

In the liquid crystal panel 300 of the present embodiment, the reflective layer 312 is formed almost entirely over the liquid crystal display area, and the opening 312a is provided for each pixel. In the reflective layer 312, a portion other than the opening 312a is a reflective portion 312b that substantially reflects light.
Further, the black light-shielding film 3 made of black resin or the like is provided in the inter-pixel region.
14BM is formed. As the black resin, a colorant such as a black pigment or dye dispersed in a transparent resin,
Alternatively, a colorant having three colors of R (red), G (green) and B (blue) mixed together and dispersed in a transparent resin is used.

In this embodiment, the reflection layer 312 is integrally formed over a plurality of pixels. However, as in the first embodiment, a reflection layer is formed for each pixel, and the black layer is formed between the reflection layers. A light shielding film may be formed.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIGS. 4 (a) and 4 (b). The liquid crystal panel 400 of this embodiment is the second
A first substrate 411, a second substrate 421, and a reflective layer 41 having an opening 412a and a reflective portion 412b similar to those in the embodiment.
2, transparent electrode 416, alignment film 417, transparent electrode 422,
Since the alignment film 423, the sealant 430, the liquid crystal 432, the retardation plates 440 and 450, and the polarization plates 441 and 451 are included, the description thereof will be omitted.

In this embodiment, as shown in FIG. 4A, the color filter is formed on the second substrate 421 instead of the first substrate 421 on which the reflection layer 412 is formed. More specifically, the colored layer 4 is formed on the second substrate 421.
24 is formed for each pixel, and the same black light shielding film 424BM as that of the second embodiment is formed in the inter-pixel region. A transparent surface protective layer 425 is formed on the colored layer 424 and the black light shielding film 424BM.

A transparent electrode 42 is formed on the surface protective layer 425.
2 is formed, and the alignment film 42 is formed on the transparent electrode 422.
3 is formed.

As shown in FIG. 4B, the colored layer 424 (dotted line in the figure) of the color filter substrate 420 is different from the reflective substrate 410 on which the reflective layer 412 is formed.
12 and the openings 412a in the plan view.
It is configured to completely cover a. In addition, the colored layer 4
24 is integrally configured so as to project from a region overlapping with the opening 412a in a plane direction toward a surrounding region to a region overlapping with the reflecting portion 412b of the reflecting layer 412. That is, the reflective layer 412 includes a region that overlaps with the colored layer 424 in a plane (an inner peripheral region in the illustrated example) and a region that does not overlap with the colored layer 424 in a plane (an outer peripheral region in the illustrated example).

Even when the reflective layer 412 and the colored layer 424 are formed on different substrates as in this embodiment, the reflective layer 4
If the planar overlapping mode of 12 and the colored layer 424 is configured as described above, the same operational effects as those of the first and second embodiments can be obtained.

[Other Configuration Example] Next, FIG.
With reference to (d) and FIGS. 6A to 6D, other configuration examples applicable to each of the above embodiments will be described. In each configuration example described below, only the planar positional relationship between the reflective layer and the colored layer is shown and described.

(Structure example 1) Structure example 1 shown in FIG.
In each pixel, a colored layer 514 having an R (red) hue is formed on the reflective layer 512 having the opening 512a in each pixel.
r, a colored layer 514g exhibiting a hue of G (green), and B
The colored layers 514b having a hue of (blue) are formed to overlap each other in a plane. In this configuration example, the colored layers 514 r and 5 in each pixel are similar to the above-described embodiments.
Each of 14g and 514b is configured to completely cover the opening 512a, and is integrally configured so as to extend from a region overlapping with the opening 512a in a plane to a region overlapping with a surrounding reflection surface in a plane.

(Structure example 2) Structure example 2 shown in FIG. 5 (b)
In each pixel, the colored layer 61 exhibiting a hue of R (red) is formed on the reflective layer 612 having the opening 612a in each pixel.
4r, a colored layer 614g exhibiting a hue of G (green), and B
The colored layers 614b having a hue of (blue) are formed to overlap each other in a plane. In this configuration example, each colored layer 614r, 614g, 614b has an opening 612a.
Is not completely covered, and there is a region that does not planarly overlap the colored layer in a part of the opening 612a.

In this configuration example 2, in order to reduce the color difference between the reflective display and the transmissive display, the reflective coloring ratio (the area ratio of the area overlapping the colored layer to the total reflection area of the reflective layer 612 in plan view). ) Is the transmission coloring ratio (the area ratio of the region that planarly overlaps the colored layer with respect to the total opening area of the opening 612a).
It is configured to be smaller than. As a result, the brightness of the reflective display is improved and the saturation of the transmissive display is relatively increased.

(Structural example 3) Structural example 3 shown in FIG.
In each pixel, a plurality of colored layers 714r exhibiting a hue of R (red) are provided so as to overlap each other on the reflective layer 712 having the opening 712a in a plane.
715r and 716r, colored layers 714g, 715g and 716g exhibiting a G (green) hue, and colored layers 714b, 715b and 716b exhibiting a B (blue) hue are formed.

In this configuration example, the colored layers 714r, 714
g, 714b overlaps with the opening 712a in a plane, and the other colored layers 715r, 715g, 715b, 716.
r, 716g, and 716b are configured so as to planarly overlap only on the reflective surface of the reflective layer 712. In this way, a plurality of colored layers may be configured to overlap each other in each pixel in plan view.

(Structural Example 4) Structural Example 4 shown in FIG.
In the above, on the reflective layer 812 having the opening 812a, the colored layer 814r exhibiting a hue of R (red) and G
The colored layer 814g having a (green) hue and the colored layer 814b having a B (blue) hue are formed to overlap each other in a plane. In this configuration example, the colored layer 812
r, 812g, 812b are configured so as to have different areas from each other, and as a result, the reflection coloring ratio (ratio of the reflection area overlapping the coloring layer to the total reflection area in the pixel in plan view).
Are different values depending on the hues R (red), G (green) and B (blue) of the colored layer. More generally speaking, the ratio of the above-mentioned reflection coloring ratio to the transmission coloring ratio (ratio of the opening area that overlaps the colored layer in plan view with the total opening area in the pixel) is different for each color. Has become.

According to the present configuration example 4, not only can the colors of the reflection type display and the transmission type display be set separately as in the above-described embodiment and other configuration examples, but also the reflection coloring ratio (or the reflection coloring ratio and the transmission type) can be set. By setting the (ratio to the coloring ratio) for each color, an appropriate color can be obtained according to the material of the colored layer of each color.

(Structure example 5) Structure example 5 shown in FIG.
In the reflective layer 912, a plurality of (two in the illustrated example) openings 912a are provided for each pixel. A portion of the reflective layer 912 other than the opening 912a is a reflective portion 912b that substantially reflects light. The colored layers 914r and 914 that planarly overlap with the reflective layer 912 are provided.
g and 914b are configured to respectively cover the plurality of openings 912a and planarly overlap only a part of the reflecting portion 912b.

(Structure example 6) A structure example 6 shown in FIG.
In, the plurality of (three in the illustrated example) colored layers 1014r, 1014g, and 1014 that planarly overlap the reflective layer 1012 having the opening 1012a and the reflective portion 1012b.
b, 1015r, 1015g, 1015b, 1016
r, 1016g, 1016b are provided. Here, the colored layers 1014r, 1014g, 1014b are configured to overlap the opening 1012a in a plane, and the colored layers 1015r, 1015g, 1015b, 1016r, 1 are formed.
016g and 1016b are configured so as to planarly overlap only a part of the reflecting portion. Then, the colored layer 1014
r, 1014g, 1014b are colored layers 1015r, 10
15g, 1015b, 1016r, 1016g, 101
6b has a color density higher than that of 6b, that is, it contains a coloring material such as a pigment or a dye at a higher density.

In the sixth structural example, the colored layers 1014r, 1014g, 1014 overlapping the opening 1012a in plan view.
b has a high light density, and the colored layers 1015r and 101 are configured to planarly overlap only a part of the reflecting portion 1012b.
5g, 1015b, 1016r, 1016g, 1016
Since the light density of b is low, the saturation of the transmitted light becomes relatively higher and the reflected light becomes brighter than in the case of each of the above embodiments.

As described above, the present invention does not exclude a case where the light densities of the colored layers are partially different. In particular, regarding the colored layer, it is desirable that the light density of the region that overlaps with the optical opening of the reflective layer in the plane is high, and the light density of the region that overlaps with the other reflective layer is low.

(Structure example 7) Structure example 7 shown in FIG.
In, a plurality of (two in the illustrated example) colored layers 1114r, 1114g, and 1114 that planarly overlap the reflective layer 1112 having the opening 1112a and the reflective portion 1112b.
b, 1115r, 1115g, 1115b are provided. The colored layers 1114r, 1114g, 1114b and the colored layers 1115r, 1115g, 1115b are laminated or arranged so as to overlap each other in plan view. Note that FIG. 6D shows the reflective layer 1112 and the colored layer 1114 in this configuration example 7.
r, 1114g, 1114b and colored layers 1115r, 1
It is a cross-sectional view in the case where 115g and 1115b are formed by laminating each other.

In the configuration example 7, the coloring layer 1114 is used.
r, 1114g, 1114b and colored layers 1115r, 11
In a region where 15 g and 1115 b are overlapped in a plane, that is, in a region where the opening 1112 a is overlapped in a plane, the thickness of the coloring layer is substantially large, and the coloring layers 1114 r,
In the region where 1114g and 1114b are formed and which does not planarly overlap with the colored layers 1115r, 1115g and 1115b, that is, in the region where the reflective portion 1112b planarly overlaps, the thickness of the colored layer is substantially It is configured to be thin. Therefore, the saturation of the transmitted light is further improved by the thick colored layer, and the brightness of the reflected light is further improved by partially forming the thin colored layer.

As described above, the present invention does not exclude the case where the colored layer is formed by partially changing the thickness. In particular, it is desirable that the colored layer is formed to be substantially thick in a region overlapping with the optical aperture of the reflective layer in a plane and substantially thin in a region overlapping with other reflective layers in a plane.

Here, in order to enhance the above effect, the colored layers 1115r, 1 overlapping the opening 1112a in plan view.
The color density of 115g and 1115b is high, and the opening 1012
a colored layer 1114 configured to project from a region that planarly overlaps a to a region that planarly overlaps a part of the reflecting surface.
The color densities of r, 1114g, and 1114b may be lowered.

(Structural Example 8) FIG. 7 schematically shows the structure of structural example 8. In this configuration example 8, in the R pixel and the B pixel, the colored layer 1214 is entirely formed on the reflective layer 1212.
r and 1214b are formed, the colored layer 121 is formed so as to overlap only a part of the reflective layer 1212 in the G pixel.
4 g are formed. The colored layer 1214g has an opening 1
212a is entirely covered and spreads so as to project to the opening edge, whereby the colored layer 1214g is configured to overlap only a part of the reflective portion 1212b.

In the eighth structural example, the reflective layer 1212
Aperture ratio (opening 12 with respect to the total area of the reflective layer 1212)
The area ratio of 12a) is 30 to 7 in common for each RGB pixel.
It is 0%. Further, the coverage area ratio of the G pixel (reflecting portion 121
The ratio of the area of the colored layer 1214g to the area of 2b) is 4
It is 0 to 80%.

With the above configuration, in the R pixel and the B pixel, the coverage area ratio of the colored layers 1214r and 1214b to the reflective portion 1212b (the reflective portion 1212b).
The ratio of the area of the colored layer that overlaps the reflective portion 1212 with respect to the area of, i.e., the reflective coloring ratio) is 100% to ensure the saturation, and in the G pixel, the coverage of the colored layer 1214g to the reflective portion 1212b. The lightness is increased by lowering. This makes it possible to increase the brightness of the reflective display without substantially reducing the saturations of R and B.

(Structural Example 9) FIG. 8 schematically shows the structure of structural example 9. In this configuration example 9, in the B pixel, the reflective layer 1312 is entirely covered with the colored layer 1314b (coverage area ratio 100%), and in the R pixel, the colored layer 1314r.
Opening 1314ra exposing a part of the reflective layer 1312
Is equipped with. Further, in the G pixel, the colored layer 1314g is configured so as to completely overlap with the opening 1312a of the reflective layer 1312 and to project to the periphery thereof, thereby forming the reflective portion 1312.
It only overlaps a part on 12b.

Further, in the ninth structural example, the reflective layer 1
The aperture ratio of 312 is 30 to 70% in common for each RGB pixel.
Is. Further, the coverage area ratio of the R pixel is 60 to 100%,
The coverage area ratio of the G pixel is 40 to 80%.

(Structural Example 10) FIG. 9 schematically shows the structure of the structural example 10. In this configuration example 10, in the B pixel, the reflective layer 1412 is entirely covered with the colored layer 1414b (coverage area ratio 100%), and in the R pixel, the colored layer 1414.
The opening 141 where 14r exposes a part of the reflective layer 1412
It has 4ra. In this example, two openings 1414ra are provided. Further, in the G pixel, the colored layer 141
4g completely overlaps with the opening 1412a of the reflection layer 1412, and is configured so as to project to the periphery thereof and overlaps only a part of the reflection part 1412b.

Further, in the tenth structural example, the aperture ratio of the reflective layer 1412 is 30 to 70 in common for each pixel of RGB.
%. The coverage area ratio of the R pixel is 60 to 100.
%, The coverage area ratio of the G pixel is 40 to 80%.

(Structure Example 11) FIG. 10 shows a structure example 11
The configuration of is schematically shown. In this configuration example 11, B
In the pixel, the coloring layer 1514b includes an opening 1514ba that exposes part of the reflective layer 1512. In this example, two openings 1514ba are provided. In the R pixel, the coloring layer 1514r has an opening 1514ra that exposes part of the reflective layer 1512. In this example, two openings 1514ra are provided. Further, in the G pixel, the colored layer 1514g is the opening 1512 of the reflective layer 1512.
It completely overlaps with a, and is configured so as to project to the periphery thereof and overlaps only a part on the reflecting portion 1512b.

Further, in the eleventh configuration example, the aperture ratio of the reflective layer 1512 is 30 to 70 in common for each pixel of RGB.
%. Further, the coverage area ratio of the B pixel is 70 to 100.
%, The coverage area ratio of the R pixel is 60 to 100%, and the coverage area ratio of the G pixel is 40 to 80%.

(Structural Example 12) FIG. 11 shows a structural example 12
The configuration of is schematically shown. In this configuration example 12, B
In the pixel, the coloring layer 1614b includes an opening 1614ba which exposes part of the reflective layer 1612. In this example, two openings 1614ba are provided. Further, in the R pixel, the colored layer 1614r includes an opening 1614ra that exposes part of the reflective layer 1612. In this example, two openings 1614ra are provided. Further, in the G pixel, the colored layer 1614g is the opening 1612 of the reflective layer 1612.
It completely overlaps with a, and is configured so as to project to the periphery thereof so as to overlap only a part on the reflecting portion 1612b.

Further, in the twelfth structural example, the aperture ratio of the reflective layer 1612 is 30% which is common to each pixel of RGB. Further, the coverage area ratio of the B pixel is 65.3%, the coverage area ratio of the R pixel is 65.3%, and the coverage area ratio of the G pixel is 30.
2%.

(Structure Example 13) FIG. 12 shows a structure example 13
The configuration of is schematically shown. In this configuration example 13, B
In the pixel, the coloring layer 1714b includes an opening 1714ba that exposes part of the reflective layer 1712. In this example, two openings 1714ba are provided. Further, in the R pixel, the colored layer 1714r has an opening 1714ra that exposes part of the reflective layer 1712. In this example, two openings 1714ra are provided. Further, in the G pixel, the colored layer 1714g is the opening 1712 of the reflective layer 1712.
It completely overlaps with a, and is configured so as to project to the periphery thereof and overlaps only a part on the reflecting portion 1712b.

Further, in the configuration example 13, the aperture ratio of the reflective layer 1712 is 30% in common for each of the RGB pixels. The coverage area ratio of the B pixel is 75.4%, the coverage area ratio of the R pixel is 75.4%, and the coverage area ratio of the G pixel is 40.
2%.

(Structure Example 14) FIG. 13 shows a structure example 14
The configuration of is schematically shown. In this configuration example 14, B
In the pixel, the coloring layer 1814b includes an opening 1814ba that exposes part of the reflective layer 1812. In this example, two openings 1814ba are provided. Further, in the R pixel, the colored layer 1814r includes an opening 1814ra that exposes a part of the reflective layer 1812. In this example, two openings 1814ra are provided. Further, in the G pixel, the colored layer 1814g is the opening 1812 of the reflective layer 1812.
It completely overlaps with a, and is configured so as to project to the periphery thereof so as to overlap only a part on the reflecting portion 1812b.

Further, in the configuration example 14, the aperture ratio of the reflective layer 1812 is 50% in common for each of the RGB pixels. The coverage area ratio of B pixel is 75.4%, the coverage area ratio of R pixel is 75.4%, and the coverage area ratio of G pixel is 47.
7%.

(Configuration Example 15) FIG. 14 shows a configuration example 15
The configuration of is schematically shown. In the configuration example 15, the reflective layer 1912 of each pixel includes a pair of left and right reflective portions 1912b.
Are provided in a separated state, and the opening 1912 is provided therebetween.
a is formed. In the B pixel and the R pixel, the colored layer 1
914b and 1914r entirely cover the reflective layer 1912. Further, in the G pixel, the colored layer 1914g completely overlaps with the opening 1912a of the reflective layer 1912 and is configured to project to the periphery of the opening 1912a.
It only overlaps a part on 2b. That is, the reflector 1
Reference numeral 912b denotes an opening 19 provided in the colored layer 1914g.
It is partially exposed by 14 ga.

Further, in the configuration example 15, the aperture ratio of the reflective layer 1912 is 70% in common for each of the RGB pixels. Further, the coverage area ratio of the B pixel and the R pixel is 100%,
The coverage area ratio of the G pixel is 50.0%.

(Optical Characteristics) Next, FIG. 15 shows the optical characteristics of Configuration Examples 8 to 11 described above. FIG. 15 shows 19
In the xy chromaticity diagram in the 31CIE xyz color system, the color data of the transmitted light and the reflected light of the RGB pixel of each of the above configuration examples is shown. Generally, in the xy chromaticity diagram, as shown in FIG. 16, the tint that is actually visually recognized within a bell-shaped range with the tint (hue and saturation) of single wavelength light in the visible light region as a boundary line. Are arranged. When color display is performed using three color layers (for example, RGB), it is possible to form a tint within a triangle formed by connecting the data points of each color layer RGB. . Basically, the larger the area of the triangle, the higher the quality of color display.

FIG. 15 shows transparent display color data (data points surrounded by a dashed line in the figure) of the above-mentioned configuration examples 8 to 11.
The color data of the reflective display (data points surrounded by the two-dot chain line in the figure) are also shown. Here, the diamonds indicate the data points of configuration example 8, the squares indicate the data points of configuration example 9, the triangles indicate the data points of configuration example 10, and the crosses indicate the data points of configuration example 11. In addition, H in the drawing indicates a data point displayed in white.

In FIG. 15, in order to compare with the color data of the above configuration example, the aperture ratio of the reflective layer is set to 30% and RG is set.
B, a transmissive portion coloring layer overlapping the opening portion and a reflecting portion coloring layer overlapping the reflecting portion are separately formed for each color.
The measurement was performed also in the case of using a color filter substrate formed by a 6-step process in which patterning was performed once, and is shown by a black dot in the figure as a comparative example. Here, FIG. 17A shows the spectral transmittance of the colored layer of the transmission part, and FIG.
Shows the spectral transmittance of the colored layer of the reflection part. In the transmissive region (opening), the light passes through the transmissive colored layer only once, whereas in the reflective region (reflective part) the light travels back and forth twice through the reflective colored layer. Figure 1 shows the colored layer
As shown in FIG. 7 (a), an optical element exhibiting relatively high saturation optical characteristics (low average transmittance T) is used, and the reflective portion coloring layer has relatively high saturation as shown in FIG. 17 (b). Although the average transmittance T is low, it has high optical characteristics. As a result, the brightness of the reflective display can be improved while ensuring the saturation of the transmissive display.

In Structural Examples 8 to 11 according to the present invention,
A colored layer having the same optical characteristics as the colored layer of the transmissive portion of the comparative example of the above six-stage process, that is, the spectral transmittance shown in FIG. 17A was used. As a result, as shown in FIG. 15, it was possible to obtain a reflective display color quality close to that of the comparative example. In particular, the configuration example 11 has substantially the same hue and saturation as those of the comparative example. As described above, according to the present invention, it is possible to realize the color quality equivalent to the case where the optical characteristics of the filter portions of the transmission area and the reflection area are separately set. Further, as compared with the comparative example, patterning (for example, a photolithography process) is not required twice for each of the RGB colors, so that there is an advantage that the manufacturing cost can be significantly reduced.

As shown in Structural Examples 8 to 15, it is preferable that the areas of the openings of the reflective layer are the same between the pixels having the colored layers of different colors. This is because the same amount of incident light can be applied to the pixels of each color by configuring the pixels having the colored layers of different colors with different areas of the opening of the reflective layer, and thus the color adjustment of the transmissive display. This is because it becomes possible to perform relatively easily. For example, if the opening area forming the transmissive region is RG
Since each B color is the same as each other, the appearance of the color is similar to that of the transmissive display device. Therefore, the color layers of each of the RGB colors are appropriately adjusted based on the color material of the color filter used in the transmissive display device. Then, the optical characteristics of the coloring material can be set. In addition, since the area of the reflective portion is the same in the pixels having the colored layers of different colors, it is easy to adjust the area of the colored layer on the reflective portion for each color when performing the color adjustment of the reflective display. Become. For example, since the area of the reflection part that constitutes the reflection area is the same for each of the RGB colors, the appearance of the colors is similar to that of the reflective display device.
The coating area ratio can be set for each colored layer of each color by appropriately adjusting it based on the color filter used in the reflective display device.

In the above configuration example, the coverage area ratio of the colored layer on the reflective portion is different between the pixels having the colored layers of at least two different colors. This allows
The reflective display is achieved by adjusting the optical characteristics of the colored layers of each color so as to optimize the color of the transmissive display realized by the light transmitted through the opening, and by adjusting the covering area ratio of the colored layers of the respective colors that overlap the reflective portion. It is possible to optimize the color of. Therefore, the color of transmissive display and the color of reflective display can be adjusted independently for each color.

When the colored layers of red, green, and blue are provided, the coverage of the green colored layer is made smaller than the coverage of the red and blue colored layers, so that the reflective display It is possible to improve brightness while suppressing a decrease in saturation. The transmissive display is composed of light that has been transmitted through the colored layer only once in the area that overlaps the opening, whereas the reflective display is mainly composed of light that is transmitted through the colored layer twice in the area that overlaps the reflective portion. Since the reflected light reflected by the portion of the colored layer in the overlapping area is also partially affected, the reflective display generally has higher saturation than the transmissive display, but tends to be dark. Therefore, in the reflective display, as the optical characteristic of the colored layer, it is necessary to increase the lightness even if the saturation is slightly decreased.

However, in particular, the relative luminous efficiency has a wavelength of 555n.
Since it has a peak at m, even if the amount of light energy is the same, green and yellow look brighter than red and blue, and therefore the relationship between saturation and brightness differs for each color. For example, in order to make the colored layers of red (R pixels) and blue (B pixels) brighter, light other than red and blue (specific luminous efficiency) is used unless the light energy in the red and blue wavelength regions is significantly increased. Since there is no way but to increase the high green or yellow light), if the total amount of light is limited, it will cause a significant decrease in saturation that is not worth improving the brightness. On the other hand, in the case of green (G pixel) mainly having a wavelength range with high relative visibility, it is difficult for the color to become dark even if the saturation is increased, and therefore the saturation is not significantly reduced even if the brightness is increased. Absent.

In the case of the present invention, both the saturation and the lightness in the reflective display are achieved by adjusting the coating area ratio on the reflective portion of the colored layer. In this case, in the R pixel and the B pixel, when the coverage area ratio is greatly reduced, the area becomes brighter but the saturation sharply decreases. Therefore, it is preferable to set the coverage area ratio as high as 60 to 100%. on the other hand,
In the G pixel, by reducing the covering area ratio, the reflected light includes light in the wavelength bands of red and blue other than green, but the relative luminous efficiency is large with respect to these other wavelength bands. Since the saturation does not decrease so much due to the difference, it is preferable to set the coverage rate as low as 35 to 50%. By setting the green coverage area ratio and the red and blue coverage area ratios within the above ranges, it is possible to improve the color reproducibility and brightness of the reflective display while ensuring the color reproducibility of the transmissive display.

In any of the above-mentioned configuration examples, the reflecting portion is arranged around the entire circumference of the opening. That is, the opening is formed in the reflective layer so as to be surrounded by the reflective portion. Therefore, even if some displacement occurs between the colored layer and the reflective layer, it is possible to prevent a region not covered with the colored layer from being formed in the opening. In particular, since the opening is formed substantially in the center of the reflective layer, the colored layer can be formed so as to overlap with the central portion of the reflective layer and its surroundings. Performance is less affected and stable production is possible.

The aperture ratio of the aperture with respect to the reflective layer is 30.
It is preferably ˜70%. Generally, when the aperture ratio of the reflective layer is large, the transmissive display is bright, but on the contrary, the reflective display is dark. Therefore, it is necessary to set the aperture ratio of the reflective layer so as to balance the transmissive display and the reflective display. More specifically, if the aperture ratio is too small, it is necessary to increase the illuminance of the backlight, which increases the power consumption of the backlight. On the other hand, if the aperture ratio is too large, the reflective display becomes dark and it becomes difficult to visually recognize it. In this embodiment, since the brightness of the reflective display can be obtained by providing a region that does not overlap with the colored layer in a part of the reflective portion, compared to the case where the structure in which the colored layer is laminated on the entire reflective layer is adopted. Thus, it becomes possible to balance the transmissive display and the reflective display in the above range where the aperture ratio is large, and good color quality can be realized in both the transmissive display and the reflective display. If the aperture ratio is less than the above range, the power consumption increases because it is necessary to secure the brightness of the transmissive display, and thus it becomes difficult to adopt it in a mobile electronic device such as a mobile phone. Further, if the aperture ratio exceeds the above range, it becomes difficult to achieve both brightness and saturation in reflective display,
It becomes difficult to ensure color quality in reflective display.

[Embodiment of Electronic Equipment] An embodiment in which the electro-optical device including the liquid crystal panel is used as a display device of electronic equipment will be described. FIG. 18 is a schematic configuration diagram showing the overall configuration of this embodiment. The electronic device shown here has a liquid crystal panel 200 similar to the above, and a control means 1200 for controlling the same. Here, the liquid crystal panel 200 is conceptually divided into a panel structure 200A and a drive circuit 200B composed of a semiconductor IC or the like. Further, the control means 1200 controls the display information output source 121.
0, a display processing circuit 1220, a power supply circuit 1230,
A timing generator 1240.

The display information output source 1210 is a ROM (Read
Only a memory (RAM) or a random access memory (RAM), 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 are generated by the timing generator 1240. Based on various clock signals, display information is supplied to the display information processing circuit 1220 in the form of an image signal of a predetermined format or the like.

The display information processing circuit 1220 is serial-
It is equipped with various well-known circuits such as a parallel conversion circuit, an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, and a clamp circuit, executes input display information, and outputs the image information to the drive circuit 200B together with the clock signal CLK. Supply. The drive circuit 200B includes a scan line drive circuit, a data line drive circuit, and an inspection circuit. In addition, the power supply circuit 123
0 supplies a predetermined voltage to each component described above.

FIG. 19 shows a mobile phone which is an embodiment of an electronic device according to the present invention. This mobile phone 2000
A circuit board 2001 is arranged inside the case body 2010, and the liquid crystal panel 2 described above is provided for the circuit board 2001.
00 is implemented. Operation buttons 2020 are arranged on the front surface of the case body 2010, and an antenna 2030 is attached to and retractable from one end. Earpiece 20
A speaker is arranged inside 40, and a microphone is built inside the transmitter 2050.

The liquid crystal panel 200 installed in the case body 2010 is constructed so that the display surface (the above liquid crystal display area A) can be viewed through the display window 2060.

The electro-optical device and the electronic apparatus according to the present invention are not limited to the above-mentioned illustrated examples, and it goes without saying that various modifications can be made without departing from the scope of the present invention. For example, although the liquid crystal panel shown in each of the above embodiments has a simple matrix type structure,
FT (thin film transistor) and TFD (thin film diode)
The present invention can also be applied to an active matrix type liquid crystal device using active elements (active elements) such as Further, although the liquid crystal panel of the above-mentioned embodiment has a so-called COG type structure, it is configured to connect a flexible wiring substrate or a TAB substrate to a liquid crystal panel which does not have a structure in which an IC chip is directly mounted, for example, a liquid crystal panel. It does not matter even if it is a thing.

In the above-described embodiments, the case where the electro-optical device is applied to a liquid crystal device has been described. However, the present invention is not limited to this, and an electroluminescent device, particularly an organic electroluminescent device, an inorganic electroluminescent device, or the like. Plasma display devices, FED (field emission display) devices, LED (light emitting diode) display devices, electrophoretic display devices, thin cathode ray tubes, small televisions using liquid crystal shutters, digital micromirror devices (D
The present invention can be applied to various electro-optical devices such as devices using MD).

[0133]

As described above, according to the present invention,
It is possible to improve the saturation of the transmissive display while ensuring the brightness of the reflective display. In addition, the difference in color between the reflective display and the transmissive display can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a liquid crystal panel showing an appearance of a liquid crystal panel 200 in a first embodiment of an electro-optical device according to the invention.

FIG. 2 is a schematic sectional view (a) schematically showing a sectional structure of the first embodiment and a schematic enlarged plan view (b) of a color filter substrate.

FIG. 3 is a schematic sectional view (a) schematically showing a sectional structure of a liquid crystal panel 300 in a second embodiment of an electro-optical device according to the invention and a schematic enlarged plan view (b) of a color filter substrate.

FIG. 4 is a schematic sectional view (a) schematically showing a sectional structure of a liquid crystal panel 400 in a third embodiment of an electro-optical device according to the invention, and a schematic enlarged plan view (b) of a color filter substrate.

5A to 5D are schematic explanatory views (a) to (d) schematically showing an overlapping state of a reflective layer and a colored layer in other configuration examples 1 to 4.

FIG. 6 is a schematic explanatory view (a) to (c) schematically showing an overlapping state of a reflective layer and a colored layer in other configuration examples 5 to 7;
9 is a schematic cross-sectional view (d) of Configuration Example 7. FIG.

FIG. 7 is a schematic explanatory view schematically showing a configuration of a configuration example 8 according to the present invention.

FIG. 8 is a schematic explanatory view schematically showing a configuration of a configuration example 9 according to the present invention.

FIG. 9 is a schematic explanatory view schematically showing a configuration of a configuration example 10 according to the present invention.

FIG. 10 is a schematic explanatory diagram that schematically shows the configuration of Configuration Example 11 according to the present invention.

FIG. 11 is a schematic explanatory diagram schematically showing a configuration of a configuration example 12 according to the present invention.

FIG. 12 is a schematic explanatory view schematically showing a configuration of a configuration example 13 according to the present invention.

FIG. 13 is a schematic explanatory diagram that schematically shows the configuration of Configuration Example 14 according to the present invention.

FIG. 14 is a schematic explanatory view schematically showing a configuration of a configuration example 15 according to the present invention.

FIG. 15 is an xy chromaticity diagram showing a comparison between the colored layers of Structural Examples 8 to 11 and the color data of the comparative example of the six-step process.

FIG. 16 is a chromaticity diagram of a 1931 CIExyz color system.

FIG. 17 is graphs (a) and (b) showing the spectral transmittance of the colored layer.

FIG. 18 is a schematic configuration diagram showing a block configuration of an embodiment of an electronic device according to the invention.

FIG. 19 is a schematic perspective view showing the external appearance of an embodiment of the electronic device.

FIG. 20 is a schematic cross-sectional view schematically showing the structure of a conventional reflective transflective liquid crystal panel.

[Explanation of symbols]

200 LCD panel 211 First substrate 212 reflective layer 212a opening 212b Reflector 214 Colored layer 215 Surface protection layer 216 transparent electrode 221 second substrate 222 transparent electrode 230 sealing material 240,250 Polarizer

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2H048 BA02 BA45 BB02 BB07 BB08                       BB10 BB37 BB42                 2H091 FA02Y FA14Y FD04 FD06                       GA01

Claims (17)

[Claims] 1. In an electro-optical device, an electro-optical material layer disposed between a pair of substrates, and a colored layer disposed between one of the pair of substrates and the electro-optical material layer. The electro-optical material layer and a reflective layer having a reflection portion that reflects light that has passed through the colored layer, and a reflective layer having an opening portion, the colored layer is arranged on the opening portion,
An electro-optical device, wherein the electro-optical device is arranged only on a part of the reflecting portion. 2. The ratio of the area of the reflective portion where the colored layer is arranged to the area of the reflective portion is calculated from the ratio of the area of the opening where the colored layer is arranged to the area of the opening. The electro-optical device according to claim 1, wherein the electro-optical device is also small. 3. The electro-optical device according to claim 1, wherein the colored layer is arranged so as to completely cover the opening. 4. The electro-optical device according to claim 1, wherein the colored layer is arranged so as to project from above the opening to above the reflecting portion around the opening. . 5. An electro-optical device, comprising: a pair of display electrodes, an electro-optical material layer disposed between the pair of display electrodes, and a planar overlapping region of the pair of display electrodes. A plurality of pixels arranged in a plurality, a coloring layer arranged in each of the pixels, and a reflecting portion arranged in each of the pixels and reflecting light passing through the electro-optical material layer and the coloring layer. And a reflective layer having an opening, the colored layer is arranged on the opening,
An electro-optical device, wherein the electro-optical device is arranged on a part of the reflecting portion. 6. The area of the opening corresponding to each of the plurality of pixels is substantially the same, and the area of the colored layer corresponding to at least one of the plurality of pixels is the same as the other areas. The electro-optical device according to claim 5, wherein the area of the colored layer corresponding to a plurality of pixels is different. 7. In the electro-optical device, an electro-optical material layer arranged on a plurality of pixels, a plurality of kinds of colored layers having different colors arranged on the pixel, and on each of the pixels. And a reflective layer having a reflective portion and an opening for reflecting light that has passed through the electro-optical material layer and the colored layer, wherein the colored layer is disposed on the opening and the reflective portion. The electro-optical device is characterized in that at least one of the plurality of types of colored layers is disposed only on a part of the reflective portion. 8. The electro-optical device according to claim 7, wherein the areas of the openings of the reflective layer are the same between the pixels having the colored layers of different colors. 9. The electro-optical device according to claim 7, wherein a coverage area ratio of the colored layer on the reflective portion is different between the pixels provided with the colored layers of at least two different colors. . 10. The colored layers of red, green, and blue are provided, and the coverage of the colored layers of green is smaller than the coverage of the colored layers of red and blue. The electro-optical device according to claim 9. 11. The covering area ratio of the colored layer of green is 3
The coating area ratio of the red and blue colored layers is 60 to 100%.
The electro-optical device according to item 0. 12. The electro-optical device according to claim 1, wherein the reflecting portion is arranged around the entire circumference of the opening. 13. The electro-optical device according to claim 1, 5 or 7, wherein an aperture ratio of the opening to the reflective layer is 30 to 70%. 14. An electronic apparatus comprising: the electro-optical device according to claim 1, 5 or 7, and a control unit that controls the electro-optical device. 15. A color filter substrate, comprising: a substrate, a reflective layer disposed on the substrate, having a reflective portion that reflects light, and an opening, and a colored layer disposed on the substrate, The color filter substrate, wherein the coloring layer is arranged on the opening and is arranged only on a part of the reflecting portion. 16. In a color filter substrate, a substrate on which pixels are set, a colored layer arranged on the substrate according to the pixels, and a coloring layer arranged on the substrate according to the pixels to reflect light. A color filter substrate, comprising: a reflective layer having a reflective portion and an opening, wherein the colored layer is disposed on the opening and at least a part of the reflective portion. 17. A color filter substrate, wherein a substrate on which pixels are set, a plurality of types of colored layers having different colors and arranged on the substrate according to the pixels, and the substrate according to the pixels are provided. A reflective layer disposed on the substrate, the reflective layer having a reflection portion that reflects light and an opening portion, wherein the colored layer is disposed on the opening portion and the reflective portion, and among the plurality of types of colored layers. The color filter substrate, wherein at least one kind of the colored layer is disposed only on a part of the reflective portion.