JP2004280126A - Color filter substrate and electro-optic device, method for manufacturing color filter substrate and method for manufacturing electro-optic device, and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter substrate capable of assuring both of the brightness of a reflection display and the saturation of a transmission display and an electro-optic device of reflective transflective type and to decrease the differences in the colors between the reflection display and the transmission display. <P>SOLUTION: The color filter substrate is constituted by forming a reflection layer 211 provided with apertures 211a on a substrate 201 and forming color filters 212 provided with colored layers 212r, 212g and 212b thereon. The colored layers are provided with dark color parts 212 on the apertures 211a of the reflection layer 211. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a color filter substrate and an electro-optical device, and a method for manufacturing a color filter substrate and an electro-optical device, and more particularly, to a structure of a color filter suitable for use in a transflective electro-optical device. .

  2. Description of the Related Art Conventionally, there has been known a transflective liquid crystal display panel capable of visually recognizing both a reflective display using external light and a transmissive display using illumination light such as a backlight. The transflective liquid crystal display panel has a reflective layer for reflecting external light in the panel, and the reflective layer is configured to transmit illumination light such as a backlight. is there. As this type of reflective layer, there is a reflective layer having a pattern having a predetermined ratio of openings (slits) for each pixel of a liquid crystal display panel.

  FIG. 18 is a schematic cross-sectional view schematically showing a schematic structure of a conventional transflective liquid crystal display panel 100. The liquid crystal display panel 100 has a structure in which a substrate 101 and a substrate 102 are bonded to each other with a sealant 103, and a liquid crystal 104 is sealed between the substrate 101 and the substrate 102.

  On the inner surface of the substrate 101, a reflective layer 111 having an opening 111a for each pixel is formed, and a color filter 112 having colored layers 112r, 112g, 112b and a protective film 112p is formed on the reflective layer 111. Have been. The transparent electrode 113 is formed on the surface of the protective film 112p of the color filter 112.

  On the other hand, a transparent electrode 121 is formed on the inner surface of the substrate 102, and is configured to intersect the transparent electrode 113 on the opposing substrate 101. Note that an alignment film, a hard transparent film, or the like is appropriately formed on the transparent electrode 113 on the substrate 101 and on the transparent electrode 121 on the substrate 102 as necessary.

  On the outer surface of the substrate 102, a retardation plate (1/4 wavelength plate) 105 and a polarizing plate 106 are sequentially arranged. On the outer surface of the substrate 101, a retardation plate (1/4 wavelength plate) 107 and The polarizing plates 108 are sequentially arranged.

  When the liquid crystal display panel 100 configured as described above is installed in an electronic device such as a mobile phone or a portable information terminal, the liquid crystal display panel 100 is installed with the backlight 109 arranged behind it. In the liquid crystal display panel 100, in a bright place such as in the daytime or indoors, external light passes through the liquid crystal 104 along the reflection path R, is reflected by the reflective layer 111, and is transmitted through the liquid crystal 104 again and emitted. , And the reflection type display is visually recognized. On the other hand, in a dark place such as at night or outdoors, the backlight 109 is turned on, so that light of the illumination light of the backlight 109 that has passed through the opening 111a passes through the liquid crystal display panel 100 along the transmission path T and is emitted. Therefore, the transmissive display is visually recognized.

  However, in the conventional transflective liquid crystal display panel 100, light passes through the color filter 112 twice in the reflection path R, whereas light passes through the color filter 112 only once in the transmission path T. Since the light passes through, there is a problem that the saturation of the transmission type display is lower than the saturation of the reflection type display. That is, since the display brightness tends to be insufficient in the reflection type display, it is necessary to secure the display brightness by setting the light transmittance of the color filter 112 to be high. Sufficient saturation cannot be obtained in the transmissive display.

  Further, as described above, the number of times light passes through the color filter is different between the reflective display and the transmissive display, so that the color of the reflective display is greatly different from the color of the transmissive display. There is also the problem of giving.

  Therefore, the present invention is to solve the above-mentioned problems, and the problem is that when used in a display device capable of both a reflective display and a transmissive display, the brightness of the reflective display and the color of the transmissive display are improved. It is an object of the present invention to provide a color filter substrate capable of ensuring both the degree and the degree. Another object of the present invention is to provide a transflective electro-optical device capable of securing both the brightness of the reflective display and the saturation of the transmissive display. It is another object of the present invention to realize a display technique capable of reducing a difference in color between a reflective display and a transmissive display.

  In order to solve the above problems, a color filter substrate of the present invention includes a substrate, a colored layer disposed on the substrate, and having a light-colored portion and a dark-colored portion having a higher light density than the light-colored portion; And a reflective layer having a transmission part that is substantially capable of transmitting light, wherein the dark color part is disposed so as to overlap at least the transmission part in a plane.

  According to the present invention, a colored layer having a light-colored portion and a dark-colored portion is provided, and the dark-colored portion is arranged so as to overlap at least the transmissive portion of the reflective layer. Is transmitted through the dark portion, so that the saturation of the transmitted light can be improved as compared with the related art.

  Here, the light density refers to the ability per unit thickness of the colored layer to bias the wavelength distribution of light. If the light density is high (larger), the saturation (colorfulness) of transmitted light becomes stronger, and the light density becomes higher. The lower (the lower) the saturation of the transmitted light is reduced. When the coloring layer contains a coloring material such as a pigment or a dye, the light density usually has a positive correlation with the amount of the coloring material.

Specific parameters having a correlation with the concept of color density include, for example, the Y value of the XYZ color system or the L ^* value of the Lab color system corresponding to luminous transmittance or lightness, that is, the visible light region (for example, The integrated value of the spectral transmittance in the light wavelength range of 380 nm to 780 nm) can be used. The Y value and the L ^* value have a negative correlation (for example, an inverse proportional relationship) with the color density. Accordingly, the Y value and L ^* values of the dark color portion becomes smaller than the Y value and L ^* value of the color portion.

As a specific parameter having a correlation with the concept of color density, a polygonal area formed of points corresponding to the hue of the colored layer on the chromaticity diagram can also be used. The area of this polygon has a positive correlation (for example, a proportional relationship) with the color density. Therefore, for example, a polygon composed of points corresponding to the hue of the dark portion on the xy chromaticity diagram of the CIE (1931) color system or the a ^* b ^* chromaticity diagram of the CIE (1976) color system The area is larger than the area of the polygon formed by the points corresponding to the hue of the light-colored portion on the same chromaticity diagram. In addition, for example, in the case of having three colored layers, the polygon is a triangle.

  Further, the transmission part of the reflection layer is substantially capable of transmitting light, and the transmission part may be configured by providing an opening in a part of the reflection layer. The transmission part may be formed by forming a part thin.

  In this case, it is preferable that the light-colored portion is disposed so as to overlap the reflective layer except for the transmission portion in a plane, and the dark-colored portion is disposed on the substrate on which the light-colored portion is not disposed. In this structure, the light-colored portion and the dark-colored portion are formed in different plane regions, so that the thickness of the color filter can be reduced and the surface thereof can be made flat.

  Further, the reflection layer has a reflection portion in a portion other than the transmission portion, the transmission portion is an opening provided in the reflection layer, and the light-colored portion overlaps at least the reflection portion in a plane. Are preferably arranged.

  Further, it is preferable that the colored layer has a laminated structure of the light color portion and the dark color portion. In this structure, since it can be configured only by laminating the light-colored portion and the dark-colored portion, it is possible to easily manufacture. In this case, either the light-colored portion or the dark-colored portion may be configured above.

  Here, a light-transmitting layer that is partially disposed between the reflective layer and the colored layer and substantially transmits light is provided, and the dark-colored portion is disposed in a region where the light-transmitting layer is not disposed. It is preferred that With this configuration, a surface step can be provided between the light-colored portion and the dark-colored portion depending on the presence or absence of the light-transmitting layer. Further, when the surface step between the light-colored portion and the dark-colored portion is configured to be smaller than the thickness of the light-transmitting layer partially disposed, the dark-colored portion can be configured to be thicker than the light-colored portion. Therefore, the saturation of transmitted light can be further increased.

  At this time, the light transmitting layer preferably has a scattering function of scattering light. In this manner, when the reflective display is viewed through the color filter substrate, it is possible to reduce the dazzling of the illumination light or sunlight due to the regular reflection of the reflective layer, the reflection of the background, and the like. Here, the scattering function of the light-transmitting layer can be obtained by fine irregularities on the surface of the light-transmitting layer, fine particles dispersed and arranged inside the light-transmitting layer, and the like.

Furthermore, it is preferable that an underlayer is provided partially between the reflection layer and the substrate, and the dark portion is disposed in a region where the underlayer is not disposed.
With this configuration, a surface step can be provided between the light-colored portion and the dark-colored portion depending on the presence or absence of the underlayer. Further, when the surface step between the light-colored portion and the dark-colored portion is configured to be smaller than the thickness of the partially disposed underlayer, the dark-colored portion can be configured to be thicker than the light-colored portion. Therefore, the saturation of transmitted light can be further increased.

  At this time, it is desirable that the surface of the reflective layer has fine irregularities that scatter light. In this manner, when the reflective display is viewed through the color filter substrate, it is possible to reduce the dazzling of the illumination light or sunlight due to the regular reflection of the reflective layer, the reflection of the background, and the like.

  In each of the above means, it is preferable that the substrate has a concave portion, and the dark color portion is disposed in the concave portion. By disposing the dark portion in the concave portion, it is possible to provide a surface step between the light portion and the dark portion of the colored layer. When the surface step between the light-colored portion and the dark-colored portion is configured to be smaller than the depth of the concave portion, the dark-colored portion can be configured to be thicker than the light-colored portion. Therefore, the saturation of transmitted light can be further increased.

  Next, another color filter substrate of the present invention is provided with a colored layer having a dark color portion disposed on the substrate, wherein the dark color portion has a higher light density than other portions. When the coloring layer has a dark portion, the saturation of light passing through the dark portion can be higher than the saturation of light passing through other portions. Therefore, by using this color filter substrate in a liquid crystal device having a reflection layer having a transmission part (opening) that substantially transmits light, and disposing the color filter substrate so as to match the dark color part with the transmission part, the conventional color filter substrate is used. Can also increase the saturation of transmitted light. Here, the color filter substrate preferably has a dark color portion for each of the plurality of pixel regions.

  A light-transmitting layer partially disposed between the substrate and the colored layer, the light-transmitting layer being substantially light-transmittable; and the dark-colored portion being disposed in a region where the light-transmitting layer is not disposed. Is preferred. According to this color filter substrate, a surface step can be provided between the light-colored portion and the dark-colored portion depending on the presence or absence of the light-transmitting layer. Further, when the surface step between the light-colored portion and the dark-colored portion is configured to be smaller than the thickness of the light-transmitting layer partially disposed, the dark-colored portion can be configured to be thicker than the light-colored portion. Therefore, the saturation of transmitted light can be further increased.

  Further, it is preferable that the substrate has a concave portion, and the dark color portion is disposed in the concave portion. By disposing the dark portion in the concave portion, it is possible to provide a surface step between the light portion and the dark portion of the colored layer. When the surface step between the light-colored portion and the dark-colored portion is configured to be smaller than the depth of the concave portion, the dark-colored portion can be configured to be thicker than the light-colored portion. Therefore, the saturation of transmitted light can be further increased.

  Next, the electro-optical device of the present invention includes an electro-optical layer containing an electro-optical material, a substrate supporting the electro-optical layer, and a transmission portion disposed on the substrate and substantially transmitting light. A reflective layer, comprising a colored layer disposed on the substrate, and having a light-colored portion and a dark-colored portion having a higher light density than the light-colored portion, wherein the dark-colored portion overlaps at least the transmission portion in a plane. It is characterized by being arranged.

  According to the present invention, since the dark portion is disposed so as to overlap the transmission portion of the reflection layer in a plane, light passing through the transmission portion of the reflection layer passes through the dark portion, The saturation of transmitted light can be improved as compared with the related art.

  Here, it is preferable that the light-colored portion is disposed so as to overlap the reflective layer except for the transmission portion in a planar manner, and the dark-colored portion is disposed in a region where the light-colored portion is not disposed. In this structure, the light-colored portion and the dark-colored portion are formed in different plane regions, so that the thickness of the color filter can be reduced and the surface thereof can be made flat.

  Further, it is preferable that the colored layer has a laminated structure of the light-colored portion and the dark-colored portion. In this structure, since it can be configured only by laminating the light-colored portion and the dark-colored portion, it is possible to easily manufacture. In this case, either the light-colored portion or the dark-colored portion may be configured above.

  Furthermore, a light-transmitting layer disposed between the reflective layer and the colored layer and substantially transmitting light is provided, and the dark-colored portion is disposed in a region where the light-transmitting layer is not disposed. Is preferred. With this configuration, a surface step can be provided between the light-colored portion and the dark-colored portion depending on the presence or absence of the light-transmitting layer. Further, when the surface step between the light-colored portion and the dark-colored portion is configured to be smaller than the thickness of the light-transmitting layer partially disposed, the dark-colored portion can be configured to be thicker than the light-colored portion. Therefore, the saturation of transmitted light can be further increased.

  At this time, the light transmitting layer preferably has a scattering function of scattering light. In this manner, when the reflective display is viewed through the color filter substrate, it is possible to reduce the dazzling of the illumination light or sunlight due to the regular reflection of the reflective layer, the reflection of the background, and the like. Here, the scattering function of the light-transmitting layer can be obtained by fine irregularities on the surface of the light-transmitting layer, fine particles dispersed and arranged inside the light-transmitting layer, and the like.

  Further, it is preferable that an underlayer is provided partially between the reflection layer and the substrate, and the dark portion is disposed on the substrate on which the underlayer is not disposed. With this configuration, a surface step can be provided between the light-colored portion and the dark-colored portion depending on the presence or absence of the underlayer. Further, when the surface step between the light-colored portion and the dark-colored portion is configured to be smaller than the thickness of the partially disposed underlayer, the dark-colored portion can be configured to be thicker than the light-colored portion. Therefore, the saturation of transmitted light can be further increased.

  Here, it is desirable that the surface of the reflective layer has fine irregularities that scatter light. In this way, when viewing the reflective display, it is possible to reduce glare caused by illumination light or sunlight due to regular reflection of the reflective layer, reflection of the background, and the like.

  Further, it is preferable that a concave portion is provided in the base, and the dark color portion is arranged in the concave portion. By disposing the dark portion in the concave portion, it is possible to provide a surface step between the light portion and the dark portion of the colored layer. When the surface step between the light-colored portion and the dark-colored portion is configured to be smaller than the depth of the concave portion, the dark-colored portion can be configured to be thicker than the light-colored portion. Therefore, the saturation of transmitted light can be further increased.

  The above-described electro-optical device may include an opposing substrate disposed to oppose the substrate via the electro-optical layer.

  Further, another electro-optical device according to the present invention includes an electro-optical layer including an electro-optical material, a first substrate that supports the electro-optical layer, and an optical device that is disposed on the first substrate and substantially emits light. A reflective layer having a transmissive portion capable of transmitting light; a second substrate disposed opposite to the first substrate; and a light-colored portion disposed on the second substrate and having a light density higher than that of the light-colored portion. A colored layer having a high dark color portion, wherein the dark color portion is arranged to overlap at least the transmission portion in a plane.

  According to the present invention, a reflective layer having a transmitting portion is disposed on a first substrate, a colored layer having a light-colored portion and a dark-colored portion is disposed on a second substrate, and the dark-colored portion is planar at least in the transmitting portion. Is arranged so that light passing through the transmitting portion of the reflective layer passes through the dark portion, so that the saturation of the transmitted light can be improved.

  Here, a light-transmitting layer which is partially disposed between the second substrate and the coloring layer and which can substantially transmit light is provided, and the dark portion is a region where the light-transmitting layer is not disposed. Are preferably arranged. With this configuration, a surface step can be provided between the light-colored portion and the dark-colored portion depending on the presence or absence of the light-transmitting layer. Further, when the surface step between the light-colored portion and the dark-colored portion is configured to be smaller than the thickness of the light-transmitting layer partially disposed, the dark-colored portion can be configured to be thicker than the light-colored portion. Therefore, the saturation of transmitted light can be further increased.

  Further, it is preferable that the second substrate has a concave portion, and the dark portion is arranged in the concave portion. By disposing the dark portion in the concave portion, it is possible to provide a surface step between the light portion and the dark portion of the colored layer. When the surface step between the light-colored portion and the dark-colored portion is configured to be smaller than the depth of the concave portion, the dark-colored portion can be configured to be thicker than the light-colored portion. Therefore, the saturation of transmitted light can be further increased.

  Note that a first substrate and a second substrate are provided on both sides of an electro-optical layer containing an electro-optical material, and a coloring layer is provided on one of the first substrate and the second substrate. Alternatively, it is also possible to dispose a limited coloring layer in a region that overlaps the transmission portion of the reflection layer on the other substrate in a plane. In this case, since the light that has passed through the transmitting portion of the reflective layer is transmitted through the limited colored layer, the saturation of the transmitted light can be improved. Here, it is desirable that the light density of the limited coloring layer is higher than that of the coloring layer.

  Next, in the method of manufacturing a color filter substrate according to the present invention, a step of forming a light-colored portion of the colored layer in the first region and a step of forming a light-emitting portion in the second region adjacent to the first region more lightly than the light-colored portion Forming a dark portion of the colored layer having a high density.

  Further, in the method of manufacturing an electro-optical device according to the present invention, a step of forming a light-colored portion of the colored layer in the first region, and a step of forming a light-density portion in the second region adjacent to the first region more lightly than the light-colored portion Forming a dark portion of a colored layer having a high color filter substrate.

  Next, the electronic device of the present invention is a reflection device having an electro-optic layer containing an electro-optic material, a substrate supporting the electro-optic layer, and a transmission portion disposed on the substrate and substantially transmitting light. A color layer having a light-colored portion and a dark-colored portion having a higher light density than the light-colored portion, wherein the dark-colored portion is arranged to overlap at least the transmission portion in a plane. And an electro-optical device.

  Further, another electronic device of the present invention includes an electro-optic layer including an electro-optic material, a first substrate supporting the electro-optic layer, and an optical device disposed on the first substrate and substantially transmitting light. A reflective layer having a possible transmissive portion, a second substrate disposed opposite the first substrate, and a light-colored portion disposed on the second substrate and having a higher light density than the light-colored portion A coloring layer having a dark color portion, wherein the dark color portion includes an electro-optical device arranged to overlap at least the transmission portion in a plane.

  Next, embodiments of a color filter substrate, an electro-optical device, and a method of manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is a schematic sectional view schematically showing a substrate 201 which is a first embodiment of a color filter substrate according to the present invention, and a liquid crystal display panel 200 which is a first embodiment of an electro-optical device using the color filter substrate. It is.

  In the liquid crystal display panel 200, a substrate 201 made of glass, plastic, or the like is bonded to a substrate 202 via a sealant 203, and a liquid crystal 204 is sealed inside. The substrate 202, the transparent electrode 221 formed on the substrate 202, the retardation plates 205 and 207, and the polarizing plates 206 and 208 are exactly the same as those in the above-described conventional example shown in FIG.

  In the present embodiment, on the inner surface of the substrate 201, a reflective layer 211 having an opening 211a as a transmission part through which light can substantially pass is formed. The reflection layer 211 can be formed of a thin film of aluminum, an aluminum alloy, a silver alloy, or the like. The opening portion 211a has a predetermined aperture ratio (for example, 10 to 30%) based on the entire area of the pixel G for each of the pixels G arranged in a matrix in the vertical and horizontal directions along the inner surface of the substrate 210. Is formed.

  FIG. 9 shows a plan view of the substrate 201 as viewed from above. The opening 211a is formed in a rectangular shape in a plan view as shown by, for example, a dotted leader line in FIG. However, the position of the opening 211a and the shape of the opening 211 are arbitrary, and the number of the openings 211a is also arbitrary. Unlike the present embodiment, a plurality of openings may be provided for each pixel.

  On the reflective layer 211, for example, in the case of a primary color filter, colored layers 212r, 212g, and 212b of three colors of R (red), G (green), and B (blue) are provided, for example, in a known manner. The pixels G are arranged in an appropriate arrangement such as a stripe arrangement, a delta (triangle) arrangement, and a diagonal mosaic (diagonal) arrangement (a color filter having a stripe arrangement is shown in FIG. 9). Here, between the pixels G, the colored layers 212r, 212g, and 212b are overlapped with each other to form an overlap light-shielding portion 212BM that exhibits light-shielding properties. Here, the surface of each of the colored layers 212r, 212g, and 212b is basically substantially flat except for the overlapping light-shielding portion 212BM.

  In each of the colored layers 212r, 212g, and 212b, a dark portion 212c is provided on the opening 211a of the reflective layer 211, and portions other than the dark portion 212c have a lower light density than the dark portion 212c. It is a light colored part. The dark-colored portion 212c having a high light density is configured such that the concentration of a coloring material such as a pigment or a dye dispersed in the translucent resin is higher than the concentration of the light-colored portion.

  A protective film 212p made of a transparent resin or the like is formed on the coloring layers 212r, 212g, 212b and the overlapping light shielding portion 212BM. The protective film 212p protects the coloring layer from corrosion and contamination due to chemicals and the like during the process and planarizes the surface of the color filter 212.

  On the color filter 212, a transparent electrode 213 made of a transparent conductor such as ITO (indium tin oxide) is formed. In the present embodiment, the transparent electrodes 213 are formed in a plurality of parallel stripes. The transparent electrode 231 extends in a direction orthogonal to the transparent electrode 221 similarly formed in a stripe shape on the substrate 202, and includes a transparent electrode 213 and a transparent electrode 221 (indicated by a dashed line in FIG. 9). Of the liquid crystal display panel 200 (portion of the reflective layer 211, the color filter 212, the transparent electrode 213, the liquid crystal 204, and the transparent electrode 221 within the intersection area) included in the intersection area of the pixel G. ing.

  In the present embodiment, each of the colored layers 212 is formed above the opening 211a of the reflective layer 211 by forming a deep dark portion 212c having a higher light density than other portions. The saturation of light passing through the dark-colored portions 212c of the coloring layers 212r, 212g, and 212b increases, and the saturation of light passing through the other light-colored portions decreases relatively.

  In the liquid crystal display panel 200, when the reflection type display is performed, the light passes along the reflection path R and is visually recognized, and when the transmission type display is performed, the light passes along the transmission path T. Is visually recognized. At this time, the color filter 212 functions in the reflection path T in the same manner as in the related art, but since the transmission path T passes through the opening 211a of the reflection layer 211, the transmitted light passes through the dark color part 212c of the coloring layers 212r, 212g, and 212b. As a result, the saturation in the transmissive display is improved as compared with the case of the conventional structure shown in FIG.

  Therefore, in the present embodiment, by forming the dark-colored portion 212c at a position overlapping the opening 211a of the reflective layer 211 in the color filter 212 in a planar manner, it is possible to transmit light without impairing the brightness of the reflective display. It is possible to improve the saturation of the type display. In particular, the difference in color between the reflective display and the transmissive display can be reduced as compared with the related art.

  Here, when the thickness of the dark color portion 212c is equal to that of the other light color portions, the same light is transmitted through the dark color portion and the light color portion having twice the thickness. It is preferable that the colors are substantially equal to each other. At this time, in this specification, it is assumed that the color density of the dark color part 212c is twice that of the light color part. When this expression of color density is used, more specifically, the color density of the dark color portion is preferably in the range of 1.4 to 2.6 times that of the light color portion, and particularly 1.7 to 2 times. It is preferably within a range of 3 times. In this way, the difference between the saturation of the reflective display and the saturation of the transmissive display can be further reduced, and the difference in color between the two displays can be further reduced. In addition, when the content is within the above range, it can be easily produced by adjusting the concentration of the pigment or the dye.

  In the present embodiment, the light-colored portions and the dark-colored portions 212c are arranged in a plane on the coloring layers 212r, 121g, and 212b, so that the surface (the upper surface in the drawing) of the coloring layers 212r, 212g, and 212b is formed. The unevenness can be reduced, and in particular, the colored layer can be formed flat by making the light-colored portion and the dark-colored portion have the same thickness. Therefore, the flatness of the surface of the color filter 212 can be improved, and the display quality of the liquid crystal display panel can be improved.

  Note that the opening of the reflective layer is not limited to the case where the opening is substantially an opening, but may be any transmitting part that is configured to substantially transmit light. For example, it includes a case where light is substantially transmitted by forming a part of the reflective layer thinly.

[Second embodiment]
Next, a color filter substrate 301 and a liquid crystal display panel 300 according to a second embodiment of the present invention will be described with reference to FIG. In this embodiment, substrates 301 and 302, sealing material 303, liquid crystal 304, transparent electrodes 313 and 321, retardation plates 305 and 307, and polarizing plates 306 and 308, which are configured in the same manner as in the first embodiment, are provided. Therefore, these descriptions are omitted.

  In the present embodiment, a reflective layer 311 having an opening 311a as a transmission portion through which light can substantially pass is provided on the surface of the substrate 301, and coloring layers 312r, 312g, and 312b are provided on the reflective layer 311. Are formed for each pixel. Each of these coloring layers is formed over the entire pixel so as to cover the opening 311a. The colored layer has a light-colored portion formed over the entire pixel on the reflective layer 311, and a light-colored portion laminated on the light-colored portion and having the same hue as the light-colored portion and a higher color density than the light-colored portion. And a color part 312c.

  In the present embodiment, since the coloring layers 312r, 312g, and 312b are formed by a laminated structure of the light-colored portion and the dark-colored portion 312c, light passes through only the light-colored portion on the reflection path R as in the first embodiment. However, unlike the first embodiment, light passes through both the light-colored portion and the dark-colored portion 312c in the transmission path T. Therefore, similarly to the first embodiment, the saturation of the transmissive display is improved, and the difference between the colors of the reflective display and the transmissive display can be reduced. In this case, since the transmitted light is configured to transmit through both the light-colored portion and the dark-colored portion, in this embodiment, the thickness of the dark-colored portion 312c is smaller than the thickness of the dark-colored portion in the first embodiment. can do. For example, in the case where the light density of the dark color portion is 2 in the light color portion, in order to obtain optical characteristics equivalent to those of the first embodiment in the present embodiment, the thickness of the dark color portion 312c is set to the thickness of the light color portion. Should be reduced to half.

[Third embodiment]
Next, a color filter substrate 401 and a liquid crystal display panel 400 according to a third embodiment of the present invention will be described with reference to FIG. This embodiment also includes substrates 401 and 402, a sealing material 403, a liquid crystal 404, transparent electrodes 413 and 421, retardation plates 405 and 407, and polarizing plates 406 and 408 configured similarly to the first embodiment. Therefore, these descriptions are omitted.

  Further, similarly to the above-described embodiment, in the present embodiment, the reflective layer 411 having the opening 411a as a transmission part capable of substantially transmitting light is formed on the substrate 401, and the coloring layer is directly colored thereon. A color filter 412 including the layers 412r, 412g, and 412b, the overlapping light-shielding portion 412BM, and the protective film 412p is formed.

  In this embodiment, a concave portion 401a is formed for each pixel on the substrate 401, and the concave portion 401a is formed at a position and a shape substantially matching the opening 411a of the reflective layer 411 in a plane. A dark-colored portion 412c that forms a part of the colored portion is formed in the concave portion 401a, and a light-colored light-colored portion having a light density lower than that of the dark-colored portion is formed on the entire pixel on the dark-colored portion 412c. Is formed.

  Also in this embodiment, since the colored layers 412r, 412g, and 412b have a structure in which a light-colored portion and a dark-colored portion are laminated, the same optical and operational effects as those of the second embodiment can be obtained. However, in this embodiment, since the concave portion 401a is formed on the substrate 401 and the dark color portion 412c is formed in the concave portion 401a, the flatness of the surface of the coloring layer is enhanced as compared with the case of the second embodiment. be able to.

[Fourth embodiment]
Next, a color filter substrate 501 and a liquid crystal display panel 500 according to a fourth embodiment of the present invention will be described with reference to FIG. This embodiment also includes substrates 501 and 502, a sealing material 503, a liquid crystal 504, transparent electrodes 513 and 521, retardation plates 505 and 507, and polarizing plates 506 and 508 configured in the same manner as the first embodiment. Therefore, these descriptions are omitted.

  In the present embodiment, unlike the first to third embodiments in which the color filter is formed on the substrate provided with the reflective layer, the color filter is provided on the substrate 501 provided with the reflective layer 511. Instead of being formed, a color filter 522 is formed over a substrate 502 facing the substrate 501.

  A reflective layer 511 having an opening 511a as a transmission part through which light can be transmitted substantially is formed on the substrate 501 as in the above embodiments, and a transparent insulating film 512 is formed on the reflective layer 511. Is formed, and a transparent electrode 513 is formed on the insulating film 512.

  On the other hand, colored layers 522r, 522g, and 522b are formed on the substrate 502, and a portion of each of the colored layers that overlaps the opening 511a of the reflective layer 511 in a planar manner has a higher light density than other portions. The portion 522c. The overlapping light-shielding portion 522BM and the protective film 522p are provided on the coloring layer to form a color filter 522.

  In the present embodiment, light passing through the reflection path R passes through the light-colored portion of the colored layer twice, and light passing through the transmission path T passes through the dark-colored portion 522c. Similar functions and effects can be obtained.

  The color filter substrate of this embodiment is a substrate 502. Unlike the previous embodiments, no reflective layer is formed on the substrate 502. That is, the color filter substrate of the present embodiment is formed as a substrate facing the substrate 501 on which the reflective layer is formed. By providing a dark color portion in a part of the provided coloring layer, the color characteristics of the transflective liquid crystal display panel can be improved.

  In this embodiment, the color filter 522 having the same structure as that of the first embodiment is formed on the substrate 502 facing the substrate 501 on which the reflective layer 511 is formed. The structure may be a structure in which a dark color portion is superimposed on a light color portion as in the second embodiment, or a structure in which a light color portion is superimposed on a dark color portion as in the third embodiment. In particular, a structure in which a concave portion is provided on the substrate 502 and a dark color portion is formed in the concave portion may be employed.

[Fifth Embodiment]
Next, a color filter substrate and an electro-optical device according to a fifth embodiment of the invention will be described with reference to FIG. FIG. 5 is a schematic sectional view schematically showing the structure of the liquid crystal display panel 600 of the present embodiment.

  The liquid crystal display panel 600 includes substrates 601 and 602, a sealant 603, a liquid crystal 604, transparent electrodes 613 and 621, retardation plates 605 and 607, and polarizing plates 606 and 608 configured in the same manner as in the first embodiment. Therefore, these descriptions are omitted.

  Further, as in the first embodiment, a reflection layer 611 having an opening 611a as a transmission part through which light can substantially pass is formed on the surface of the substrate 601, and a color filter 612 is formed on the reflection layer 611. Is formed. In the present embodiment, the color filter 612 includes coloring layers 612r, 612g, and 612b having a uniform color density, a light-shielding portion 612BM, and a protective layer 612p.

  On the other hand, on the substrate 602, dark layers 622r, 622g, and 622b are formed only at positions overlapping the opening 611a of the reflective layer 611 in a plane. An electrode 621 is formed. The dark layers 622r, 622g, 622b have a higher color density than the color layers 612r, 612g, 612b.

  In the present embodiment, the light passing through the reflection path R passes through the colored layer on the substrate 601 twice without passing through the dark color layer formed in the above-described limited range, but passes through the transmission path T. The light transmits through the colored layer after passing through the colored layer. Therefore, compared to the liquid crystal display panel having the conventional structure shown in FIG. 18, the saturation of the transmissive display can be increased, and the difference in color between the reflective display and the transmissive display can be reduced.

  In the present embodiment, the colored layer on the substrate 601 is formed over the entire pixel, and the dark layer on the substrate 602 is formed in a limited range that overlaps the opening 611a of the reflective layer 611 in a plane. Alternatively, the coloring layer on the substrate 601 may be formed so as to avoid the opening 611a of the reflective layer 611. In this embodiment, the light-colored layer is formed on the substrate 601 on which the reflective layer 611 is formed. Conversely, the dark-colored layer is formed on one substrate on which the reflective layer is formed. And a light-colored layer may be formed on the other substrate.

[Sixth embodiment]
Next, a liquid crystal display panel 700 according to a sixth embodiment of the present invention will be described with reference to FIG. In this embodiment, the substrates 701 and 702, the sealing material 703, the liquid crystal 704, the retardation plates 705 and 707, the polarizing plates 706 and 708, and the openings are similar to the liquid crystal display panel 100 having the conventional structure shown in FIG. A reflective layer 711 provided with 711a, and a color filter 712 having colored layers 712r, 712g, and 712b are provided.

In this embodiment, a reflection layer 711 having an opening 711a as a transmission part through which light can be substantially transmitted is formed for each pixel on a substrate 701, and the above-mentioned opening is formed on the reflection layer 711. The light transmitting layer 714 is partially formed so as to avoid 711a. The light-transmitting layer 714 can be formed of an inorganic substance such as SiO ₂ or TiO ₂ or a resin such as an acrylic resin or an epoxy resin, and may be any as long as it has a light-transmitting property in a visible light region. It is preferably transparent to visible light, for example, one having an average transmittance of 70% or more and a small chromatic dispersion (for example, a variation of transmittance of 10% or less) in a visible light region.

  In addition, over the opening 711 a, which is a region where the light-transmitting layer 714 is not formed, a dark color portion 712 c is formed directly on the substrate 701. Light-colored portions having lower light density than the dark-colored portions 712c are formed on the light-transmitting layer 714, and the dark-colored portions 712c and the light-colored portions form coloring layers 712r, 712g, and 712b. .

  In the present embodiment, a step is formed between the dark-colored portion 712c and the light-colored portion of the colored layer due to the formation of the light-transmitting layer 714, whereby the opening 711a of the reflective layer 711 in the pixel is formed. The liquid crystal 704 is configured so as to be thicker in a region overlapping with the opening 711a and thinner in a region other than the region overlapping with the opening 711a. For this reason, compared with the case where the thickness of the liquid crystal 704 is substantially equal between the region that planarly overlaps with the opening of the reflective layer and the other region as in the above-described first to fifth embodiments. , It is possible to make the transmissive display brighter. Here, it is preferable that the liquid crystal thickness in a region overlapping the opening of the reflective layer in a plane is approximately twice as large as the liquid crystal thickness in other regions.

  FIG. 16 is an explanatory diagram for explaining the effect when the thickness of the liquid crystal is changed as described above. As described above, the light-transmitting layer T is formed on the reflective layer R, the light-colored portion C1 is formed thereon, and the dark-colored portion C2 is formed directly on the opening Ra of the reflective layer R. It is assumed that the liquid crystal thickness D2 in a region overlapping the opening Ra in a plane is twice as large as the liquid crystal thickness D1 in other regions. Here, for convenience of explanation, it is assumed that a homogeneous liquid crystal cell is configured. It is assumed that the retardation of the liquid crystal cell is Δn · D1 = λ / 4 and Δn · D2 = λ / 2 (Δn is the optical anisotropy of the liquid crystal and λ is the wavelength of light).

  In the above situation, when the liquid crystal cell is in a light transmitting state, in a transmissive display, as shown in FIG. 16A, illumination light from a backlight or the like passes through the polarizing plate P2 and becomes linearly polarized light. By passing through a phase difference plate (1/4 wavelength plate) D2, for example, it becomes right-handed circularly polarized light, and then passes through a liquid crystal layer having a cell thickness of D2. The light becomes polarized light, passes through the phase difference plate D1, becomes the original linearly polarized light, and passes through the polarizing plate P1.

  Further, when the liquid crystal cell is in the light transmitting state as described above, in the reflective display, as shown in FIG. 16B, the external light passes through the polarizing plate P1 to become linearly polarized light, and the phase difference plate (1/1). (4 wavelength plate) By passing through D1, it becomes, for example, clockwise circularly polarized light, and after passing twice through the liquid crystal layer having a cell thickness of D1, the phase difference further advances by 波長 wavelength to become counterclockwise circularly polarized light, The light returns to the original linearly polarized light by passing through the retardation plate D1 again, and passes through the polarizing plate P1.

  In the transmissive display, as shown in FIG. 16C, if the thickness of the liquid crystal passing therethrough is D1, the retardation is λ / 4, so that the illumination light is transmitted through the polarizing plate P2 and the retardation plate D2. The polarization state after passing through the liquid crystal after passing through becomes a linearly polarized light in a direction orthogonal to the initial state, then passes through the phase difference plate D1, becomes a left-handed circularly polarized light, and further passes through the polarizing plate P1. At this time, the polarized light component that can pass through the polarizing plate P1 is approximately half the amount of light that can pass when the thickness of the liquid crystal is D2.

  As described above, in the case of the transflective liquid crystal display panel as in the present embodiment, the thickness of the liquid crystal in the region that overlaps the opening of the reflective layer in a plane is the thickness of the liquid crystal in the other region. When the thickness is larger than the thickness, the light transmission amount in the light transmission state increases. In particular, when the liquid crystal thickness in a region that overlaps the opening in a plane is twice as large as the liquid crystal thickness in the other region, the light transmission amount is also almost doubled. Become. The transmittance may not be improved if the liquid crystal cell is not of the homogeneous type and twist is present in the liquid crystal layer. For example, in the case of a liquid crystal having a twist of 40 degrees, the thickness of the liquid crystal in a region that overlaps the opening in a plane is doubled. By doing so, an improvement in transmittance of about 40% can be obtained.

[Seventh embodiment]
Next, a liquid crystal display panel 800 according to a seventh embodiment of the present invention will be described with reference to FIG. In this embodiment, the substrates 801 and 802, the sealant 803, the liquid crystal 804, the retarders 805 and 807, the polarizers 806 and 808, and the openings are similar to the liquid crystal display panel 100 having the conventional structure shown in FIG. A reflective layer 811 provided with 811a and a color filter 812 having colored layers 812r, 812g and 812b are provided.

  In this embodiment, a base layer 814 is partially formed on a substrate 801, and a reflective layer 811 is formed on the base layer 814. Here, the reflective layer 811 has an opening 811 a as a transmission part that can substantially transmit light for each pixel, and the opening 811 a is provided corresponding to a region where the base layer 814 is not formed. . In a region where the base layer 814 is not formed, a dark portion 812c is formed on the substrate 801. Light-colored portions having a lower light density than the dark-colored portions 812c are formed on the reflective layer 811. These light-colored portions and the dark-colored portions 812c form coloring layers 812r, 812g, and 812b, respectively.

  In the present embodiment, the underlayer 814 can be made of the same material as the light-transmitting layer of the sixth embodiment, but is not necessarily required to have a light-transmitting property, and is formed of a material having a light-shielding property. It does not matter.

  Also in the present embodiment, similarly to the sixth embodiment, the liquid crystal 804 is configured to be thick in a region that planarly overlaps with the opening 811a of the reflective layer 811, and to be thin in other regions.

[Eighth Embodiment]
Next, a liquid crystal display panel 900 according to an eighth embodiment of the present invention will be described with reference to FIG. In this embodiment, the substrates 901 and 902, the sealing material 903, the liquid crystal 904, the phase difference plates 905 and 907, the polarizing plates 906 and 908, and the openings are similar to the liquid crystal display panel 100 having the conventional structure shown in FIG. A reflective layer 911 including 911a and a color filter 912 including colored layers 912r, 912g, and 912b are provided.

  In this embodiment, as in the sixth embodiment, a reflective layer 911 having an opening 911a as a transmission part through which light can substantially pass is formed on a substrate 901. A light-transmitting layer 914 is partially formed so as to avoid the opening 911a, a dark-colored portion 912c is formed on the substrate 901 in a region where the opening 911a is formed, and a light-colored portion is formed on the light-transmitting layer 914. The colored layers 912r, 912g, and 912b are formed by the dark color portion 912c and the light color portion, respectively.

  In the present embodiment, a black light-shielding layer 912BM is formed in a region between pixels on the light-transmitting layer 914 instead of the overlapping light-shielding layer in each of the above-described embodiments. As the black light-shielding layer 612BM, a black resin material, for example, a material in which a black pigment is dispersed in a resin can be used. On the black light-shielding layer 912BM, the coloring layers 912r, 912g, and 912b are sequentially formed, and a protective film 912p is formed thereon to form a color filter 912. Each colored layer is formed such that its periphery overlaps the black light-shielding layer 912BM.

  In this embodiment, a step of forming the black light-shielding layer 612BM is separately required, but the thickness of the color filter is reduced and the flatness of the color filter surface is improved as compared with the case where the overlapping light-shielding layer is used. Can be.

[Ninth embodiment]
Next, a method for manufacturing a color filter substrate will be described as a ninth embodiment according to the present invention with reference to FIG. This method of manufacturing a color filter substrate relates to the manufacture of a color filter substrate used in the liquid crystal display panel 200 of the first embodiment.

  On the surface of the substrate 201, first, a metal such as aluminum, an aluminum alloy, a silver alloy, or chromium is formed into a thin film by a vapor deposition method, a sputtering method, or the like, and is patterned using a known photolithography method. As a result, a reflective layer 211 having an opening 211a is formed as shown in FIG.

  Next, as shown in FIG. 10B, a colored photosensitive resin (photosensitive resist) formed by dispersing a pigment, a dye, or the like having a predetermined hue is applied, and is exposed and developed in a predetermined pattern. The light-colored portion of the colored layer 212r is formed by performing the patterning. The light-colored portion has a pattern shape in which a non-formation region (opening) is provided in a portion of the reflective layer 211 above the opening 211a. Thereafter, a photosensitive resin in which the concentration of a coloring material such as a pigment or a dye is higher than that of the light-colored portion is applied, and patterning is performed in the same manner as described above, thereby forming a dark-colored portion 212c as shown in FIG. Is formed in the non-formation region of the light-colored portion. Then, by repeating the same process as above for the colored portions 212g and 212b of other hues, the colored layers of each color having the dark colored portions 212c are sequentially formed as shown in FIG. Go. Here, the respective colored layers are patterned so as to overlap each other in the inter-pixel region, and an overlapping light-shielding layer 212BM in which a plurality of (three in the illustrated example) colored layers are overlapped is formed.

  In addition, as a procedure for forming the colored layer, the light-colored portion may be formed after the dark-colored portion 212c is formed. Alternatively, the light-colored portions may be sequentially formed on the colored layers of a plurality of hues, and then the dark-colored portions may be sequentially formed. Conversely, the dark-colored portions may be sequentially formed on the colored layers of a plurality of hues. May be sequentially formed.

  In the step of forming the colored layer, a material having a high leveling property is used as a photosensitive resin, and the photosensitive resin is applied by a method that easily obtains flatness such as a spin coating method. As a result, the surface of each colored layer is formed almost flat in the pixel.

  The surface of the color filter substrate thus formed is formed substantially flat by forming a protection layer 212p (not shown). Thereafter, the liquid crystal display panel 200 shown in FIG. 1 is formed using the substrate 201 which is a color filter substrate.

  In manufacturing the liquid crystal display panel 200 shown in FIG. 1, a transparent conductor is applied by sputtering on the color filter 212 formed on the substrate 201 as described above, and is patterned by a known photolithography method. To form a transparent electrode 213. After that, an alignment film made of a polyimide resin or the like is formed on the transparent electrode 213, and rubbing treatment or the like is performed.

  Next, the above-described substrate 201 is bonded to the substrate 202 via the sealing material 203 to form a panel structure. At this time, the transparent electrode 221 and the same alignment film as described above are already formed on the surface of the substrate 202. The substrate 201 and the substrate 202 are bonded to each other by a spacer (not shown) dispersedly arranged between the substrates, a spacer mixed in the sealing material 203, or the like so as to have a substantially predetermined substrate interval.

  Thereafter, the liquid crystal 204 is injected through an opening (not shown) of the sealing material 203, and the opening of the sealing material 203 is closed with a sealing material such as an ultraviolet curing resin. After the main panel structure is completed in this way, the above-mentioned retardation plates 205 and 207 and the polarizing plates 206 and 208 are attached to the outer surfaces of the substrates 201 and 202 by a method such as sticking.

  This embodiment includes a step of forming a colored layer having a light-colored portion and a dark-colored portion having a higher light density than the light-colored portion on a substrate, and a process of forming a reflective layer having a transmissive portion on the substrate. In the step of forming the colored layer, the dark portion is formed on the transmission portion, and the light portion is formed on the reflection layer excluding the transmission portion. According to this, by providing the light-colored portion and the dark-colored portion in the colored layer, the saturation can be changed according to the light emission position. Further, by forming a dark color portion in a predetermined region on the substrate and a light color portion outside the predetermined region, the dark color portion and the light color portion are formed in mutually different plane regions, so that the thickness of the color filter is reduced. Since the surface can be flattened, the characteristics of the electro-optical device can be improved.

[Tenth embodiment]
Next, a method of manufacturing a color filter substrate according to a tenth embodiment of the present invention will be described with reference to FIG. This embodiment is a method for manufacturing a color filter substrate corresponding to the substrate 301 used in the liquid crystal display panel 300 of the second embodiment shown in FIG.

  In this embodiment, first, as shown in FIG. 11A, a reflective layer 311 having an opening 311a is formed on a substrate 301.

  Next, as shown in FIG. 11B, a light-colored portion of the colored layer 312r is formed on the reflective layer 311. The light-colored portion is formed so as to cover the opening 311a of the reflection layer 311.

  Thereafter, as shown in FIG. 11C, a dark color portion 312c is formed on the light color portion only in a region directly above the opening 311a of the reflective layer 311. The dark color portion 312c is partially formed on the light color portion. The colored layer 312r in which the portions 312c are stacked is completed. Then, such a process is similarly repeated for other hues to form the colored layers 312r, 312g, and 312b as shown in FIG. At this time, the overlapping light shielding portion 312BM is also formed in the same manner as described above.

  In the present embodiment, the colored layers are sequentially formed for each hue. However, after the light-colored portions are formed for a plurality of hues, the dark-colored portions may be sequentially formed for a plurality of hues.

  When the liquid crystal display panel 300 shown in FIG. 2 is formed using the color filter substrate of the present embodiment, the same operation as in the ninth embodiment is performed.

  In the present embodiment, the method includes a step of forming a colored layer having a light-colored portion and a dark-colored portion having a higher light density than the light-colored portion on the substrate. The light-colored portion is formed only on a region overlapping the transmission portion of the layer, and the light-colored portion is formed on the substrate including the region. According to this, since the dark color portion and the light color portion overlap each other in the region where the transparent portion overlaps, there is no need to form the light color portion in conformity with the dark color portion, and the device can be easily manufactured. In this case, either the light-colored portion or the dark-colored portion may be formed on the upper side, and even if the light-colored portion and the dark-colored portion are stacked on each other, they overlap each other in a plane but separate from each other. It may be configured to be in a state.

[Eleventh embodiment]
Next, a method of manufacturing a color filter substrate according to an eleventh embodiment of the present invention will be described with reference to FIG. This embodiment is a method for manufacturing a color filter substrate corresponding to the substrate 401 used in the liquid crystal display panel 400 of the third embodiment shown in FIG.

  In this embodiment, first, as shown in FIG. 12A, a concave portion 401a is formed in a substrate 401. The concave portion 401a can be formed by forming a mask made of a resist or the like (not shown) on the surface of the substrate 401 and selectively etching the substrate 401 by wet etching using a hydrofluoric acid-based etchant.

  Next, a reflective layer 411 is formed on the surface of the substrate 401 in the same manner as in the ninth and tenth embodiments. In the reflective layer 411, an opening 411a is provided in a formation region of the concave portion 401a by a photolithography method or the like.

  Thereafter, as shown in FIG. 12B, a dark color portion 312c of the coloring layer 312r is formed in the concave portion 401a. Then, as shown in FIG. 12C, a light-colored portion is further formed on the dark-colored portion 412c to form a colored layer 412r. Here, the light-colored portion is formed so as to cover not only the dark-colored portion 412c but also the entire pixel. Thereafter, a film is formed for other hues in the same manner as described above, and the colored layers 412g and 412b are formed.

  In the present embodiment, after forming a dark color portion, a light color portion having the same hue is formed to form a colored layer, and this procedure is repeated for each hue. However, the dark color portion is formed for a plurality of hues. After that, light-colored portions may be sequentially formed for a plurality of hues.

  When a liquid crystal display panel is formed using the color filter substrate of the present embodiment, the same operation as in the ninth embodiment is performed.

  In this embodiment, the method includes a step of forming a concave portion on the surface of the substrate, and the transmitting portion of the reflective layer is configured to overlap the concave portion. Therefore, after forming the concave portion on the surface of the substrate, the concave portion is formed. By forming the dark-colored part in the dark area, it becomes possible to form the dark-colored part thickly.

[Twelfth embodiment]
Next, a method of manufacturing a color filter substrate according to a twelfth embodiment of the present invention will be described with reference to FIG. This embodiment is a method for manufacturing a color filter substrate corresponding to the substrate 701 used in the liquid crystal display panel 700 of the sixth embodiment shown in FIG.

  In this embodiment, first, as shown in FIG. 13A, a reflective layer 711 is formed on a substrate 701. An opening 711a is formed in the reflective layer 711 for each pixel. Next, as shown in FIG. 13B, a light transmitting layer 714 is formed over the reflective layer 711. In the light-transmitting layer 714, a non-formation region (opening) is provided over the opening 711a.

The light transmitting layer 714 is formed in a portion of the reflective layer 711 except for a region immediately above the opening 711a. The light-transmitting layer 714 is formed by, for example, forming an inorganic layer or an organic layer over the entire surface of the substrate 701 and the reflective layer 711, and then selectively using a photolithography method or the like to selectively cover a portion directly above the opening 711a. It can be formed by removing. As a material of the light-transmitting layer 714, a transparent inorganic substance such as SiO ₂ or TiO ₂ , or a transparent organic resin such as an acrylic resin or an epoxy resin can be used.

  Next, as shown in FIG. 13C, a dark portion 712c is formed on the substrate 701 in the region of the opening 711a of the reflective layer 711, and a light portion is formed on the light transmitting layer 714. , A colored layer 712r composed of a dark portion 712c and a light portion. After that, the same process is performed for each of the other hues, and the colored layers 712g and 712b are formed as shown in FIG.

  In the present embodiment, either the dark color portion 712c or the light color portion may be formed first. Further, in this embodiment, the dark color portion and the light color portion are formed before and after each color layer, but the dark color portion is formed before and after a plurality of hues, and the light color portion is formed into a plurality of hues. May be formed in succession.

  When a liquid crystal display panel is formed using the color filter substrate of the present embodiment, the same operation as in the ninth embodiment is performed.

  In this embodiment, a step of forming a colored layer having a light-colored portion and a dark-colored portion having a higher light density than the light-colored portion on the substrate, a process of forming a reflective layer having a transmissive portion on the substrate, Forming a light-transmitting layer capable of substantially transmitting light; and forming the light-transmitting layer on the reflective layer excluding the transmitting portion, and forming a colored layer. The dark color portion is formed on the transmission portion, and the light color portion is formed on the light transmission layer. According to this, it is possible to provide a surface step between the light-colored portion and the dark-colored portion in the colored layer depending on the presence or absence of the light-transmitting layer formed on the reflective layer. In addition, it is possible to form the dark color portion thicker than the light color portion, and it is possible to further improve the saturation of transmitted light.

[Thirteenth embodiment]
Next, a method of manufacturing a color filter substrate according to a thirteenth embodiment of the present invention will be described with reference to FIG. This embodiment is a method for manufacturing a color filter substrate corresponding to the substrate 801 used in the liquid crystal display panel 800 of the seventh embodiment shown in FIG.

  In this embodiment, first, a base layer 814 is partially formed on a substrate 701 as shown in FIG. The base layer 814 has a predetermined non-formation region (opening) for each pixel. Next, a reflective layer 811 is formed over the base layer 814. An opening 811a is formed in the reflective layer 811 for each pixel. The opening 811a is configured to planarly match the non-forming region of the base layer 814.

  The underlayer 814 can be formed using the same material as the light-transmitting layer of the twelfth embodiment in the same manner, and can be formed using any material other than the light-transmitting material.

  Next, as shown in FIG. 14C, a dark portion 812c is formed on the substrate 801 in a region of the opening 811a of the reflection layer 811, and a light portion is formed on the reflection layer 811. A colored layer 812r including a dark portion 812c and a light portion is formed. After that, the same process is performed for each of the other hues to form the colored layers 812g and 812b as shown in FIG.

  In the present embodiment, the dark portion 812c and the light portion may be formed first. Further, in this embodiment, the dark color portion and the light color portion are formed before and after each color layer, but the dark color portion is formed before and after a plurality of hues, and the light color portion is formed into a plurality of hues. May be formed in succession.

  When a liquid crystal display panel is formed using the color filter substrate of the present embodiment, the same operation as in the ninth embodiment is performed.

  In this embodiment, a step of forming a colored layer having a light-colored part and a dark-colored part having a higher light density than the light-colored part on the substrate, a step of partially forming an underlayer on the substrate, and a step of forming a transparent part on the substrate Forming a reflective layer having a transparent layer in the non-forming region of the base layer, and forming a colored layer in the non-forming region of the base layer in the forming of the reflective layer. The light-colored portion is formed on the reflection layer except for the transmission portion of the reflection layer. Thereby, a surface step can be provided between the light-colored portion and the dark-colored portion in the colored layer depending on the presence or absence of the underlayer. In addition, it is possible to form the dark color part thicker than the light color part, and it is possible to improve the saturation of the transmitted light passing through the transmission part.

[14th Embodiment]
Next, a method of manufacturing a color filter substrate according to a fourteenth embodiment of the present invention will be described with reference to FIG. This embodiment is a method for manufacturing a color filter substrate corresponding to the substrate 901 used in the liquid crystal display panel 900 of the eighth embodiment shown in FIG.

  In this embodiment, first, as shown in FIG. 15A, a reflective layer 911 having an opening 911a is formed on the surface of a substrate 901. Thereafter, a light transmitting layer 914 is formed on the reflective layer 911. Form. In the light-transmitting layer 914, an opening 914a is provided over the opening 911a of the reflective layer 911.

  Next, as shown in FIG. 15B, a black light-blocking layer 912BM is formed over the substrate 901 and the light-transmitting layer 914. More specifically, as shown in FIG. 15A, a black photosensitive resin 912t is applied, exposed to a predetermined pattern, and patterned by a development process.

  Next, as shown in FIG. 15C, a coloring layer 912r is formed by a photolithography method. More specifically, a dark portion 912c is formed on the substrate 901 in the opening 911a of the reflective layer 911, and a light-color portion having a smaller color density than the dark portion 912c is formed in a pixel region other than the opening 911a. The dark portion 912c and the light portion form a colored layer 912r.

  Further, as shown in FIG. 15D, coloring layers 912g and 912b exhibiting other hues are similarly formed. In this embodiment, either the dark portion 912c or the light portion may be formed first. Further, in this embodiment, the dark color portion and the light color portion are formed before and after each color layer, but the dark color portion is formed before and after a plurality of hues, and the light color portion is formed into a plurality of hues. May be formed in succession.

  In this embodiment, a light transmitting layer 914 is formed on the reflective layer 911, and a black light shielding layer 912BM is formed on the light transmitting layer 914. By the way, conventionally, when the black light-shielding layer 912BM is formed directly on the reflective layer made of metal, a residue of the black resin adheres to a region where the black resin is removed at the time of patterning the black resin, and this residue has a brightness of the color filter. There is a known problem of lowering the temperature. However, in this embodiment, since the black light-blocking layer 912BM is formed on the light-transmitting layer 914 that covers the reflective layer 911, a residue of black resin is less likely to be generated, and a high-quality bright color filter 912 can be formed. .

  When a liquid crystal display panel is formed using the color filter substrate of the present embodiment, the same operation as in the ninth embodiment is performed.

  In the present embodiment, since the black light-shielding layer is formed instead of the overlapping light-shielding layer in each of the embodiments described above, the thickness of the color filter can be reduced and the flatness of the surface of the color filter can be improved. It is configured to be able to. This black light-shielding layer can be used instead of the overlapping light-shielding layer in each of the first to thirteenth embodiments.

  In this embodiment, a step of forming a colored layer having a light-colored portion and a dark-colored portion having a higher light density than that of the light-colored portion on the substrate; a step of forming a reflective layer having a transmissive portion on the substrate; Forming a light-transmitting layer through which light can be transmitted, and in the step of forming a light-transmitting layer, the step of forming a light-transmitting layer on the reflective layer excluding a transmitting portion and forming a colored layer The dark color portion is formed on the transmission portion, and the light color portion is formed on the light transmission layer. This makes it possible to provide a surface step between the light-colored part and the dark-colored part in the colored layer depending on the presence or absence of the light-transmitting layer formed on the reflective layer. In addition, it is possible to form the dark color portion thicker than the light color portion, and it is possible to further improve the saturation of transmitted light.

[Other configuration examples]
Next, another configuration example that can be used in each of the embodiments described above will be described with reference to FIG.

  In the configuration example shown in FIG. 17A, a concave portion 1001a is formed on the surface of the substrate 1001, and fine irregularities 1001b are formed on the surface other than the concave portion 1001a. Is formed with a reflective layer 1011. The reflective layer 1011 has an opening 1011a in a region above the concave portion 1001a. On these structures, the color filters 1012 having the coloring layers described in the above embodiments are formed.

  In the present configuration example, the reflective layer 1011 is formed on the unevenness 1001b, so that the reflective layer 1011 is formed in a finely uneven shape as a whole. For this reason, the reflected light reflected by the reflective layer 1011 is appropriately scattered. Therefore, when a liquid crystal display panel is configured, in a reflective display, it is dazzled by illumination light or sunlight, or the background of the display surface is Reflection can be prevented.

  Here, the above-mentioned unevenness 1001b can be formed to a surface roughness suitable for light scattering by selecting a composition of an etching solution such as a hydrofluoric acid in advance and etching using this etching solution. Alternatively, it can be formed by forming a mask using a photolithography method and performing etching through the mask.

  This configuration example can be applied to any of the above-described embodiments in which a concave portion is formed on a substrate surface and a reflective layer is directly formed on the substrate surface. Further, even in the embodiment in which the concave portion is not formed, it is possible to apply only the structure of the concave and convex 1001b and the reflective layer 1011 thereon.

  In the configuration example shown in FIG. 17B, a reflective layer 1111 having an opening 1111a is formed on a substrate 1101, and a light transmitting layer 1114 is formed on the reflective layer 1111. The opening 1114a of the light transmitting layer 1114 is formed above and corresponding to the opening 1111a of the reflective layer 1111. Then, a color filter 1112 is formed on the light transmitting layer 1114.

  In this configuration example, fine particles (for example, silica particles) having a different light refractive index from the material of the light transmitting layer 1114 are dispersed and arranged inside the light transmitting layer 1114. For this reason, both the light traveling toward the reflective layer 1111 and the light reflected by the reflective layer 1111 are scattered by the translucent layer 1114, so that glare and reflection in the reflective display can be reduced as in the above configuration example. Can be. This configuration example can be applied to all of the above embodiments in which a light-transmitting layer is provided on a reflective layer.

  In the configuration example shown in FIG. 17C, a reflective layer 1211 having an opening 1211a is formed on a substrate 1201, and a light transmitting layer 1214 is formed on the reflective layer 1211. The opening 1214a of the light transmitting layer 1214 is formed above and corresponding to the opening 1211a of the reflection layer 1211. Then, a color filter 1212 is formed on the light transmitting layer 1214.

  In this configuration example, fine irregularities 1214b are formed on the surface of the light transmitting layer 1214, and the irregularities 1214b scatter both light traveling toward the reflective layer 1211 and light reflected by the reflective layer 1211. I have. Therefore, in this configuration example as well, glare and reflection in the reflective display can be similarly reduced. The irregularities 1214b can be softened by heating after forming a periodic structure by patterning a material disposed on a substrate at a predetermined period, in addition to the etching method described in the above description of the configuration example shown in FIG. And imparting an appropriate fluidity to form an uneven shape. This configuration example can be applied to all of the above embodiments in which a light-transmitting layer is provided on a reflective layer.

  In the configuration example shown in FIG. 17D, a base layer 1314 having an opening 1314a is formed on a substrate 1301, fine irregularities 1314b are formed on the surface of the base layer 1314, and reflection is performed thereon. A layer 1311 is formed. The reflective layer 1311 has an opening 1311a directly above the base layer 1314a. Here, the unevenness 1314b of the base layer 1314 can be formed by a method similar to the unevenness forming method for the light-transmitting layer illustrated in FIG. A color filter 1312 is formed on the reflective layer 1311.

  In this configuration example, since the reflective layer 1311 is formed on the unevenness 1314b of the base layer 1314, the reflective surface is formed in a fine uneven shape, whereby dazzling and glare can be reduced as described above. This configuration example can be applied to all embodiments in which a reflective layer is formed on a base layer.

[Example 1]
Next, with reference to FIG. 19, a more detailed example 1 applicable to each of the above embodiments will be described. FIG. 19 is an enlarged partial cross-sectional view schematically showing a part of the cross-sectional structure of the color filter substrate, and a schematic plan view of the color filter in a region corresponding thereto. Here, the enlarged partial cross-sectional view is a cross-sectional view taken along line PQ of the schematic plan view.

  In the first embodiment, a light transmitting layer 1414 is formed on a substrate 1401. The light transmitting layer 1414 is made of a material capable of transmitting light, for example, a transparent material. In particular, it is preferable to be made of an organic insulating material. On the surface 1414 a of the light transmitting layer 1414, an uneven pattern formed of a regular or irregular repeating pattern of peaks and valleys is formed. This uneven pattern can be formed by the method described with reference to FIGS. The thickness of the light transmitting layer 1414 is, for example, about 2 μm.

  On the light transmitting layer 1414, a reflective layer 1411 made of Al, an Al alloy, silver, a silver alloy such as an APC alloy, or the like is formed. This reflective layer 1411 can be formed by a sputtering method, an evaporation method, or the like. The reflection layer 1411 is formed on the surface of the light-transmitting layer 1414 so that the reflection surface is formed in an uneven shape. The thickness of the reflective layer 1411 is, for example, about 0.2 μm. The reflective layer 1411 has an opening 1411a for each pixel region.

  A color filter 1412 made of a known photosensitive resin material or the like is formed on the light transmitting layer 1414 and the reflective layer 1411. The color filter 1412 includes dark portions 1412 rc (red dark portions), 1412 gc (green dark portions), and 1412 bc (dark blue portions) formed on the opening 1411 a, and formed on the reflective layer 1411. A colored layer having the light colored portions 1412r (red light colored portion), 1412g (green light colored portion), and 1412b (blue light colored portion) is included.

  Further, between the pixel regions, a light-shielding portion 1412BM formed by laminating the dark-colored portions 1412rc, 1412gc, and 1412bc on the light-colored portions 1412r, 1412g, and 1412b is formed. The overlapping light-shielding portion 1412BM is configured so that, for example, the light-colored portion 1412b is approximately 1.0 μm, the light-colored portion 1412g is approximately 0.5 μm, and the light-colored portion 1412r is approximately 0.5 μm from the lower layer.

On the colored layer configured as described above, a protective layer 1412p made of a translucent material made of an acrylic resin or another organic resin is formed. The protective layer 1412p is formed on the light-colored portions 1412r, 1412g, and 1412b, but is not formed on the dark-colored portions 1412rc, 1412gc, and 1412bc. The protective layer 1412p can be formed by, for example, forming an inorganic layer or an organic layer over the entire surface and then selectively removing a portion above a region immediately above the opening 1411a by photolithography or the like. As a material of the protective layer 1412p, in addition to an organic resin such as a transparent acrylic resin or an epoxy resin, a transparent inorganic substance such as SiO ₂ or TiO ₂ can be used. The thickness of the protective layer 1412p is, for example, about 2.2 μm.

  A transparent electrode 1413 made of a transparent conductor is formed on the protective layer 1412p. The transparent electrode 1413, which is formed on the protective layer 1412p, directly reflects the presence or absence of the protective layer 1412p, and has a main height difference Δh between a portion where the protective layer 1412p exists and a portion where the protective layer 1412p does not exist. The height difference Δh is, for example, about 2.0 μm. In addition, a gap between adjacent transparent electrodes 1413 is disposed on the overlapping light shielding portion 1412BM. The illustrated gap between the adjacent transparent electrodes 1413 is about 8 to 10 μm.

  In this embodiment, since the overlapping light-shielding portion 1412BM is formed by stacking the dark portions 1412rc, 1412gc, and 1412bc, the transmittance of the stacked structure can be reduced as compared with the case where the light-color portions are stacked. It is possible to more completely block the light between the regions. Further, since the overlapping light-shielding portion 1412BM is directly laminated on any of the light-colored portions 1412r, 1412g, and 1412b formed in the pixel region, the light transmittance of the region where the overlapping light-shielding portion 1412BM is disposed is further reduced. And the height difference Δh can be easily provided. Note that the overlapping light-shielding portion 1412BM has a structure in which three layers are stacked on the light-colored portion, but may have a structure in which only two layers or one layer is stacked.

  In the first embodiment, when configured with the thickness dimensions shown in the above examples, the entire thickness of the color filter substrate is 5.2 to 5.3 μm, and the thickness of the liquid crystal layer in the reflection region is 3. With a thickness of 25 μm, a TN type liquid crystal panel or an STN type liquid crystal panel can be formed. In this case, the thickness of the liquid crystal layer in the transmission region becomes 5.25 μm. In this case, as shown in FIG. 16, the liquid crystal layer is not a homogeneous liquid crystal layer, and the thickness of the liquid crystal layer in the transmission region is not twice as large as the thickness of the liquid crystal layer in the reflection region. Since the thickness of the liquid crystal layer is increased by about 60% with respect to the thickness of the liquid crystal layer in the reflective area, the transmittance in both the reflective display and the transmissive display can be improved by optimizing the retardation value of the liquid crystal layer. Therefore, a bright display can be obtained.

[Example 2]
Next, a second example applicable to the above embodiment will be described with reference to FIG. FIG. 20 is an enlarged partial cross-sectional view schematically showing a part of the cross-sectional structure of the color filter substrate, and a schematic plan view of the color filter in a region corresponding thereto. Here, the enlarged partial cross-sectional view is a cross-sectional view taken along line PQ of the schematic plan view.

  In the second embodiment, a concavo-convex pattern formed by etching or the like on a surface 1501a of a substrate 1501 and having peaks and valleys repeated regularly or irregularly is formed. Then, a reflective layer 1511 made of Al, an Al alloy, silver, a silver alloy such as an APC alloy, or the like is formed directly on the surface 1501a of the substrate 1501. This reflective layer 1511 can be formed by a sputtering method, an evaporation method, or the like. The reflective layer 1511 has a concave-convex shape on its reflective surface reflecting the concave-convex pattern on the surface 1501a. The thickness of the reflection layer 1511 is, for example, about 0.2 μm. The reflective layer 1511 has an opening 1511a for each pixel region.

  A color filter 1512 made of a known photosensitive resin material or the like is formed on the reflective layer 1511. The color filter 1512 includes dark portions 1512 rc (red dark portion), 1512 gc (green dark portion), and 1512 bc (dark blue portion) formed on the opening 1511 a, and formed on the reflective layer 1511. A colored layer having the light colored portions 1512r (red light colored portion), 1512g (green light colored portion), and 1512b (blue light colored portion) is included.

On the color filter 1512 configured as described above, a protective layer 1512p made of a translucent material made of acrylic resin or other organic resin is formed. The protective layer 1512p is formed on the light-colored portions 1512r, 1512g, and 1512b, but is not formed on the dark-colored portions 1512rc, 1512gc, and 1512bc. The protective layer 1512p can be formed, for example, by forming an inorganic layer or an organic layer over the entire surface and then selectively removing a portion above a region immediately above the opening 1511a by photolithography or the like. As a material of the protective layer 1512p, in addition to an organic resin such as a transparent acrylic resin or an epoxy resin, a transparent inorganic substance such as SiO ₂ or TiO ₂ can be used. The thickness of the protective layer 1512p is, for example, about 2.2 μm.

  A transparent electrode 1513 made of a transparent conductor is formed on the protective layer 1512p. The transparent electrode 1513, which is formed on the protective layer 1512p, directly reflects the presence or absence of the protective layer 1512p, and has a main height difference Δh between a portion where the protective layer 1512p exists and a portion where the protective layer 1512p does not exist. The height difference Δh is, for example, about 2.0 μm.

  In the second embodiment, the overlap light shielding portion formed in the first embodiment is not formed. Instead, the gap G between adjacent transparent electrodes 1513 is narrowed to a width of about 4 to 6 μm. In this embodiment, in the gap G between the adjacent transparent electrodes 1513, a horizontal electric field is generated due to the potential difference between the adjacent transparent electrodes 1513 in the driving state of the display body. The light shielding effect in the gap G is obtained by utilizing the alignment of the liquid crystal molecules.

  Also in the second embodiment, in the case where the liquid crystal layer has the thickness dimensions shown in the above examples, it is possible to configure a TN type liquid crystal panel or an STN type liquid crystal panel by setting the thickness of the liquid crystal layer in the reflection region to 3.25 μm. become. In this case, the thickness of the liquid crystal layer in the transmission region becomes 5.25 μm. In this case, as shown in FIG. 16, the liquid crystal layer is not a homogeneous liquid crystal layer, and the thickness of the liquid crystal layer in the transmission region is not twice as large as the thickness of the liquid crystal layer in the reflection region. Since the thickness of the liquid crystal layer is increased by about 60% with respect to the thickness of the liquid crystal layer in the reflective area, the transmittance in both the reflective display and the transmissive display can be improved by optimizing the retardation value of the liquid crystal layer. Therefore, a bright display can be obtained.

[Example 3]
Next, a more detailed example 3 applicable to each of the above embodiments will be described with reference to FIG. FIG. 21 is an enlarged partial cross-sectional view schematically showing a part of the cross-sectional structure of the color filter substrate, and a schematic plan view of the color filter in a region corresponding thereto. Here, the enlarged partial cross-sectional view is a cross-sectional view taken along line PQ of the schematic plan view.

  In the third embodiment, a reflective layer 1611 made of Al, an Al alloy, silver, a silver alloy such as an APC alloy, or the like is formed on the substrate 1601. This reflective layer 1611 can be formed by a sputtering method, an evaporation method, or the like. The reflective layer 1611 is formed flat on the flat surface of the substrate 1601. The thickness of the reflection layer 1611 is, for example, about 0.2 μm. An opening 1611a is provided in the reflection layer 1611 for each pixel region.

  A color filter 1612 made of a known photosensitive resin material or the like is formed on the reflective layer 1611. The color filter 1612 includes dark portions 1612 rc (red dark portion), 1612 gc (green dark portion), and 1612 bc (dark blue portion) formed on the opening 1611 a, and formed on the reflective layer 1611. A colored layer having the light colored portions 1612r (red light colored portion), 1612g (green light colored portion), and 1612b (blue light colored portion) is included.

  Further, between the pixel regions, a light-shielding portion 1612BM formed by laminating the dark-colored portions 1612rc, 1612gc, and 1612bc on the light-colored portions 1612r, 1612g, and 1612b is formed. In the overlapping light shielding portion 1612BM, for example, the light-colored portion 1612b is about 1.0 μm, the light-colored portion 1612g is about 0.5 μm, and the light-colored portion 1612r is about 0.5 μm in order from the lower layer.

On the color filter 1612 configured as described above, a protective layer 1612p made of a translucent material made of acrylic resin or other organic resin is formed. The protective layer 1612p has a substantially flat surface including the portion where the overlapping light shielding portion 1612BM is formed. As a material of the protective layer 1612p, in addition to an organic resin such as a transparent acrylic resin or an epoxy resin, a transparent inorganic substance such as SiO ₂ or TiO ₂ can be used. The thickness of the protective layer 1612p is, for example, about 2.2 μm.

  A transparent electrode 1613 made of a transparent conductor is formed on the protective layer 1612p.

  In the present embodiment, the overlapping light-shielding portion 1612BM is formed by stacking the dark-colored portions 1612rc, 1612gc, and 1612bc, so that the light-shielding between the pixel regions can be performed more completely. In addition, since the overlapping light shielding portion 1612BM is directly laminated on any of the light color portions 1612r, 1612g, and 1612b formed in the pixel region, the light transmittance of the overlapping light shielding portion 1612BM can be further reduced. Note that the overlapping light-shielding portion 1612BM has a structure in which three layers are stacked on the light-colored portion, but may have a structure in which only two layers or one layer is stacked.

  In the third embodiment, the scattering layer 1619 is disposed on the observation side of the color filter 1612. The scattering layer 1619 reduces reflection of the background in a specific viewing angle direction, glare, lack of brightness, and the like due to regular reflection of external light by the reflection layer 1611. It is preferable that the scattering layer 1619 has a forward scattering characteristic. For example, a material in which fine particles composed of another transparent material having a slightly different refractive index from the base material are dispersed in a transparent base material may be used.

  Further, as the scattering layer 1619, an adhesive layer having an adhesive function can be used. For example, a material in which a transparent adhesive is used as a base material and transparent fine particles having a slightly different refractive index from the base material are dispersed is used. In this case, as shown in the figure, the substrate 1602 on the observation side (indicated by a two-dot chain line in the figure) is used as an adhesive layer for bonding a retardation plate 1605 or a polarizing plate 1606 further disposed on the observation side. Can be. Note that the structure and the liquid crystal layer on the surface of the substrate 1602 are omitted in the drawing.

[Configuration example of color filter]
Lastly, a configuration example of the color filters 1412, 1512, and 1612 of the first to third embodiments according to the present invention will be described with reference to FIGS. Note that this configuration example can be similarly applied to the color filters of the above embodiments other than the first to third embodiments. FIG. 22 is a spectral characteristic diagram (a) showing spectral characteristics of transmitted light in a dark color portion of the color filter, an xy chromaticity diagram (b) of the CIE (1931) color system of the transmitted light, and FIG. FIG. 23 is an a ^* b ^* chromaticity diagram (c) of the CIE (1976) color system, and FIG. 23 is a spectral characteristic diagram (a) showing the spectral characteristics of light transmitted through the light-colored portion of the color filter; An xy chromaticity diagram (b) of the CIE (1931) color system and an a ^* b ^* chromaticity diagram (c) of the CIE (1976) color system of the transmitted light. Here, each of the above figures shows the result of calculating the spectral transmittance and chromaticity coordinates of the transmitted light that has been transmitted once through each dark color portion or each light color portion using the same C light source.

  As shown in FIG. 22, the main transmission region of the red-dark portion (R) is 600 to 700 nm, and the average transmittance of this region is about 90%, and particularly, the transmittance is maximum in the region of 640 to 700 nm. (About 95%). The main transmission region of the green dark portion (G) is 495 to 570 nm, and the average transmittance in this region is about 85%, and particularly, the transmittance is maximum (about 90%) in the region of 510 to 550 nm. ing. The main transmission region of the deep blue portion (B) is 435 to 500 nm, and the average transmittance in this region is about 85%, and particularly, the transmittance is maximum (about 88%) in the region of 445 to 480 nm. ing.

Further, the Y value of the CIE color system (1931) is about 24 to 26 for the deep red part (R), about 70 to 72 for the deep green part (G), and about 29 to 31 for the deep blue part (B). It is. L ^* values of the CIE color system (1976) are about 56 to 58 in the deep red part (R), 86 to 88 in the deep green part (G), and about 60 to 62 in the deep blue part (B). is there.

Further, the area of a triangle having three vertices corresponding to the hues of the deep red part (R), the deep green part (G), and the deep blue part (B) on the chromaticity diagram is about 0.1. 05 (on the xy chromaticity diagram) and about 7000 (on the a ^* b ^* chromaticity diagram).

  On the other hand, as shown in FIG. 23, the main transmissive region of the red-and-light color portion (R) is 585 to 700 nm, and the average transmissivity of this region is about 93%, and particularly, the transmissivity is 590 to 700 nm. It is the maximum (about 96%). The main transmissive area of the green light color portion (G) is 480 to 600 nm, the average transmissivity of this area is about 92%, and the transmissivity becomes maximum (about 94%) especially in the area of 500 to 580 nm. I have. The main transmissive area of the blue and pale color portion (B) is 430 to 510 nm, the average transmissivity of this area is about 89%, and the transmissivity is maximum (about 92%) especially in the area of 440 to 500 nm. I have.

The Y value of the CIE color system (1931) is 46 to 48 in the red light color part (R), 89 to 91 in the green light color part (G), and 44 to 46 in the blue light color part (B). L ^* values of the CIE color system (1976) are about 73 to 75 in the deep red part (R), about 95 to 97 in the deep green part (G), and about 72 to 74 in the deep blue part (B). is there.

Further, on the chromaticity diagram, the area of a triangle having three points as vertices corresponding to the hues of the red light color portion (R), the green light color portion (G), and the blue light color portion (B) is about 0.01 (xy). Chromaticity diagram) and about 1700 (a ^* b ^* chromaticity diagram).

As described above, the relationship of the optical density between the dark color portion and the light color portion in the optical characteristics is such that the light color portion is larger than the dark color portion in the Y value or L ^* value corresponding to luminous transmittance or lightness. . Here, the value of the light color portion is preferably about 1.2 to 2.5 times the value of the dark color portion. Regarding the area of the triangle on the chromaticity diagram corresponding to the saturation, the area of the triangle on the chromaticity diagram of the dark portion is larger than the area of the triangle on the chromaticity diagram of the light portion. Here, the area of the triangle on the chromaticity diagram of the dark portion is preferably about 3 to 8 times the area of the triangle on the chromaticity diagram of the light portion.

  The light density can be defined not only by the index on the optical characteristics as described above, but also by the manufacturing conditions and the structure. For example, there is a magnitude relationship between the amounts of coloring materials such as pigments and dyes which are mixed in a state of being dispersed in the coloring layer when forming the coloring layer of the color filter. That is, the amount (weight or volume) of the coloring material per unit volume is larger in the dark color part than in the light color part.

[Electronics]
Finally, a specific example of an electronic apparatus including the electro-optical device (liquid crystal display panel) of each of the above embodiments will be described. FIG. 24 is a schematic perspective view showing the appearance of a mobile phone 2000 as an example of the electronic apparatus. The mobile phone 2000 is provided with an operation unit 2002 provided with an operation switch on the surface of a casing 2001, and a sound detection unit 2003 including a detector such as a microphone and a sound generation unit 2004 including a sound generator such as a speaker. Are provided. A display unit 2005 is provided in a part of the casing 2001, and the display screen of the electro-optical device according to each of the above-described embodiments disposed inside the display unit 2005 can be viewed through the display unit 2005. A display signal is sent from a control unit provided inside the casing 2001 to the electro-optical device, and a display image corresponding to the display signal is displayed.

  FIG. 25 is a schematic perspective view showing the appearance of a wristwatch 3000 as an example of the electronic apparatus. This wristwatch 3000 has a watch main body 3001 and a watch band 3002. The watch main body 3001 is provided with external operation members 3003 and 3004. A display unit 3005 is provided on the front surface of the timepiece main body 3001, and the display screen of the electro-optical device according to each of the above-described embodiments is configured to be visually recognized through the display unit 3005. For this electro-optical device, a display signal is sent from a control unit (clock circuit) provided inside the watch main body 3001, and a display image corresponding to the display signal is displayed.

  FIG. 26 is a schematic perspective view showing the external appearance of a computer device 4000 as an example of the electronic apparatus. In the computer device 4000, an MPU (microprocessor unit) is configured inside a main body section 4001, and an operation section 4002 is provided on an outer surface of the main body section 4001. Further, a display unit 4003 is provided, and the electro-optical device of each of the above-described embodiments is accommodated inside the display unit 4003. Then, the display screen of the electro-optical device can be visually recognized through the display unit 4003. The electro-optical device is configured to receive a display signal from an MPU provided inside the main body 4001 and display a display image corresponding to the display signal.

  The color filter substrate and the electro-optical device, the method for manufacturing the color filter substrate, the method for manufacturing the electro-optical device, and the electronic apparatus according to the present invention are not limited to the illustrated examples described above, and the gist of the present invention Of course, various changes can be made without departing from the scope.

  For example, in each of the embodiments described above, a passive matrix type liquid crystal display panel has been exemplified. However, as an electro-optical device of the present invention, an active matrix type liquid crystal display panel (for example, a TFT (thin film transistor), The present invention can be similarly applied to a liquid crystal display panel having a TFD (thin film diode) as a switching element. In addition, the present invention is similarly applied not only to liquid crystal display panels but also to various electro-optical devices capable of controlling a display state for each of a plurality of pixels, such as electroluminescence devices, organic electroluminescence devices, and plasma display devices. It is possible to do.

  Further, the color filter substrate of the present invention is not limited to the above-described electro-optical device, and can be used for various display devices, imaging devices, and other various optical devices.

FIG. 1 is a schematic sectional view schematically showing a structure of a liquid crystal display panel according to a first embodiment of the present invention. It is a schematic sectional view showing typically the structure of the liquid crystal display panel of a 2nd embodiment concerning the present invention. It is an outline sectional view showing typically the structure of the liquid crystal display panel of a 3rd embodiment concerning the present invention. It is an outline sectional view showing typically the structure of the liquid crystal display panel of a 4th embodiment concerning the present invention. It is an outline sectional view showing typically the structure of the liquid crystal display panel of a 5th embodiment concerning the present invention. It is an outline sectional view showing typically the structure of the liquid crystal display panel of a 6th embodiment concerning the present invention. It is an outline sectional view showing typically the structure of the liquid crystal display panel of a 7th embodiment concerning the present invention. It is an outline sectional view showing typically the structure of the liquid crystal display panel of an 8th embodiment concerning the present invention. FIG. 2 is a schematic plan view schematically illustrating a planar structure of the color filter substrate according to the first embodiment. It is a schematic process drawing (a)-(d) showing typically the manufacturing method of the color filter substrate of a 9th embodiment concerning the present invention. It is a schematic process drawing (a)-(d) showing typically the manufacturing method of the color filter substrate of a 10th embodiment concerning the present invention. It is a schematic process drawing (a)-(d) showing typically the manufacturing method of the color filter substrate of an 11th embodiment concerning the present invention. It is a schematic process drawing (a)-(d) which shows typically the manufacturing method of the color filter substrate of a 12th embodiment concerning the present invention. It is a schematic process drawing (a)-(d) which shows typically the manufacturing method of the color filter substrate of a 13th embodiment concerning the present invention. It is a schematic process drawing (a)-(d) which shows typically the manufacturing method of the color filter substrate of a 14th embodiment concerning the present invention. FIG. 3 is an explanatory diagram for explaining an optical function of the liquid crystal display panel according to the present invention. It is a schematic partial sectional view (a)-(d) showing typically other examples of composition applicable to each above-mentioned embodiment. It is a schematic sectional drawing which shows typically the structure of the transflective liquid crystal display panel of a conventional structure. 3A and 3B are an enlarged partial cross-sectional view of a color filter substrate according to a first embodiment and a plan view of a color filter to show a more specific structure. FIG. 9 is an enlarged partial cross-sectional view of a color filter substrate according to a second embodiment and a plan view of the color filter to show a more specific structure. FIG. 9 is an enlarged partial cross-sectional view of a color filter substrate according to a third embodiment and a plan view of the color filter to show a more specific structure. FIG. 9 is a diagram illustrating a spectral transmittance of a dark color portion of the color filters formed in Examples 1 to 3, an xy chromaticity diagram, and an a ^* b ^* chromaticity diagram. It is a figure which shows the spectral transmittance in the light color part of the color filter formed in Examples 1-3, an xy chromaticity diagram, and an a ^* b ^* chromaticity diagram. FIG. 1 is a schematic perspective view illustrating an appearance of a mobile phone as an example of an electronic apparatus including the electro-optical device according to each embodiment. FIG. 1 is a schematic perspective view illustrating the appearance of a timepiece (wristwatch) as an example of an electronic apparatus including the electro-optical device according to each embodiment. FIG. 1 is a schematic perspective view illustrating an appearance of a computer (information terminal) as an example of an electronic apparatus including an electro-optical device according to each embodiment.

Explanation of reference numerals

200 liquid crystal display panel, 201, 202 substrate, 203 sealing material, 204 liquid crystal, 205, 207 retardation plate, 206, 208 polarizing plate, 209 backlight, 211 reflection layer, 211a opening, 212 color filter, 212r, 212g, 212b colored layer, 212BM overlapping light shielding layer, 212c dark portion, 213,221 transparent electrode, R reflection path, T transmission path

Claims (17)

In the color filter substrate,
Board and
A colored layer disposed on the substrate, and having a light-colored portion and a dark-colored portion having a higher light density than the light-colored portion;
A reflective layer disposed on the substrate, and having a transmissive portion capable of substantially transmitting light,
The color filter substrate, wherein the dark color portion is arranged so as to overlap at least the transmission portion in a plane. The reflection layer has a reflection portion in a portion other than the transmission portion,
The transmission section is an opening provided in the reflection layer,
The color filter substrate according to claim 1, wherein the light-colored portion is disposed so as to overlap at least the reflection portion in a plane.   The color filter substrate according to claim 1, wherein the coloring layer has a laminated structure of the light-colored portion and the dark-colored portion.   A light-transmitting layer that is partially disposed between the reflective layer and the colored layer and that can substantially transmit light; and the dark-colored portion is disposed in a region where the light-transmitting layer is not disposed. The color filter substrate according to claim 1, wherein:   The color filter substrate according to claim 4, wherein the light transmitting layer has a scattering function of scattering light.   2. The device according to claim 1, further comprising an underlayer partially disposed between the reflective layer and the substrate, wherein the dark portion is disposed in a region where the underlayer is not disposed. 3. Color filter substrate.   The color filter substrate according to claim 6, wherein the surface of the reflective layer has fine irregularities that scatter light.   The color filter substrate according to claim 1, wherein the substrate has a concave portion, and the dark portion is disposed in the concave portion. A colored layer having a dark portion, which is disposed on the substrate,
A color filter substrate, wherein the dark color portion has a higher light density than other portions.   A light-transmitting layer partially disposed between the substrate and the coloring layer and capable of substantially transmitting light; and the dark-colored portion is disposed in a region where the light-transmitting layer is not disposed. The color filter substrate according to claim 9, wherein:   The color filter substrate according to claim 9, wherein the substrate has a concave portion, and the dark color portion is disposed in the concave portion. In electro-optical devices,
An electro-optic layer containing an electro-optic material;
A substrate supporting the electro-optic layer,
A reflective layer disposed on the substrate, and having a transmissive portion capable of substantially transmitting light; and a colored layer disposed on the substrate, and having a dark color portion having a light density higher than the light color portion and the light color portion. With
The electro-optical device according to claim 1, wherein the dark color portion is arranged so as to overlap at least the transmission portion in a plane. In electro-optical devices,
An electro-optic layer containing an electro-optic material;
A first substrate supporting the electro-optic layer;
A reflective layer disposed on the first substrate, the reflective layer having a transmissive portion capable of substantially transmitting light;
A second substrate disposed opposite to the first substrate;
A colored layer disposed on the second substrate and having a light-colored portion and a dark-colored portion having a higher light density than the light-colored portion;
The electro-optical device according to claim 1, wherein the dark color portion is arranged so as to overlap at least the transmission portion in a plane. In a method for manufacturing a color filter substrate,
Forming a light-colored portion of the colored layer in the first region;
Forming, in a second region adjacent to the first region, a dark color portion of a colored layer having a higher light density than the light color portion;
A method for manufacturing a color filter substrate, comprising: A method for manufacturing an electro-optical device, comprising the method for manufacturing a color filter substrate according to claim 14 as a step. An electronic apparatus comprising the electro-optical device according to claim 12. An electronic apparatus comprising the electro-optical device according to claim 13.

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