JP2003107457A - Semi-transmissive reflecting plate and semi-transmissive color liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a semi-transmissive reflecting plate used for semi- transmissive reflecting color liquid crystal display device with excellent color reproducibility in a color filter and high quality and to provide a semi- transmissive reflecting color liquid crystal display device with the characteristics above. SOLUTION: The semi-transmissive reflecting plate is characterized in that a resin black film is formed on one side of a glass plate, a light guide path is formed in the resin black film so that a light from a light source being a backlight made incident from a side opposite to the side of the glass plate, on which the resin black film is formed, passes through the light guide path, after a metallic film is formed in the resin black film on which the light guide path is formed, a light guide path is formed also in the metallic film by etching corresponding to the light guide path formed in the resin black film, when a color filter pixel is formed thereon in a post-process, and the metallic film at a border of an adjacent color filter pixel is removed by etching so that the resin black film at the border acts like a black matrix.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-transmissive reflective plate used in a high-quality transflective color liquid crystal display device having excellent color reproducibility of a color filter and a transflective color liquid crystal display having the above characteristics. Regarding the device.

[0002]

2. Description of the Related Art In recent years, a semi-transmissive color having a high reflection efficiency over a wide angle in both bright and dark places and a wide viewing angle in any direction by utilizing light from a backlight as well as outside light. Liquid crystal display devices are receiving attention. For example, Japanese Patent Laid-Open No. 2000-19
No. 507, a surface of a transparent plate such as a glass plate through which light is transmitted is made uniform and fine by sandblasting, and a metal film such as aluminum is formed thereon as a reflective film by a vacuum deposition method or the like, Disclosed is an inner surface diffusion semi-transmission type reflection plate in which a light guide path through which light passes at a constant and uniform interval is formed by etching, and a transparent protection film is formed on the reflection film of the inner surface diffusion semi-transmission type reflection plate. An internal diffusion semi-transmissive color liquid crystal display device in which a reflective film is formed to prevent oxidation, the surface is flattened, and a color filter layer and a transparent electrode layer are formed on the surface to form one substrate for liquid crystal display. Is disclosed. According to this inner surface diffusion semi-transmissive type color liquid crystal display device, light incident from the outside is diffusely reflected by the surface of the reflection film to be uniformly diffused, and light from the backlight as a light source passes through the light guide path to the front side. Since it is radiated to the outside, it is possible to efficiently use the light from the outside and the light from the light source, and it has a high reflection efficiency over a wide angle both in bright and dark places, and has a wide viewing angle in any direction. The effect is obtained.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The inner surface diffusion transflective color liquid crystal display device described in Japanese Patent Application Laid-Open No. 000-19507 has the above-mentioned excellent characteristics, but it is not always satisfactory in the color reproducibility of the color filter. Therefore, the present invention provides a semi-transmissive reflective plate used in a high-quality transflective color liquid crystal display device having excellent color reproducibility of a color filter and a transflective color liquid crystal display device having the above characteristics. To aim.

[0004]

A semi-transmissive reflector according to the present invention made on the basis of the above points is as described in claim 1.
A resin black film is formed on one surface of the glass plate, and the light source uses a backlight that is incident from a surface opposite to the surface of the glass plate on which the resin black film is formed. A light guide path is formed on the resin black film, and a metal film is further formed on the resin black film having the light guide path formed thereon. Then, the metal corresponding to the light guide path formed on the resin black film is formed. The light guide path is formed in the film by etching, and when the color filter pixel is formed on the light guide path in a later step, the resin black film functions as a black matrix at the boundary portion between the adjacent color filter pixels. It is characterized in that the metal film in the portion is removed by etching. A semi-transmissive reflector according to a second aspect is the semi-transmissive reflector according to the first aspect, wherein the surface of the metal film is a flat surface. The transflective reflector according to claim 3 is the transflective reflector according to claim 1, characterized in that fine irregularities are formed on the surface of the metal film so that the inner surface can diffuse. The transflective reflector according to claim 4 is the transflective reflector according to claim 3, wherein the resin black film has fine irregularities on its surface by exposure and development by a photolithography method and a light guide path. Are formed. The transflective reflector according to claim 5 is the transflective reflector according to claim 4, wherein the fine irregularities are formed in a random pattern having a periodicity. Further, the semi-transmissive color liquid crystal display device of the present invention, as described in claim 6,
It is characterized by comprising the semi-transmissive reflection plate described in any one of 1. The transflective color liquid crystal display device according to claim 7 is the transflective color liquid crystal display device according to claim 6, wherein a color filter layer is directly formed on the transflective reflection plate according to claim 2. A transparent electrode layer and an alignment film are formed on the color filter layer via a flattening film to form one substrate for a liquid crystal display, and a light diffusion film is provided to face the substrate via the liquid crystal layer. A semi-transmissive color liquid crystal display device having a color liquid crystal display mechanism by disposing the other substrate for liquid crystal display, wherein a single light guide path is formed in the resin black film and the metal film. The color filter layer is formed so as to be filled with one color filter material. Also,
The transflective color liquid crystal display device according to claim 8 is the transflective color liquid crystal display device according to claim 6, wherein a color filter layer is directly formed on the transflective reflection plate according to claim 3. A transparent electrode layer and an alignment film are formed on a color filter layer via a flattening film to form one substrate for liquid crystal display, and the other substrate for liquid crystal display is opposed to the substrate via the liquid crystal layer. Is a transflective color liquid crystal display device having a color liquid crystal display mechanism in which a single color filter material is filled in a light guide formed in the resin black film and the metal film. Thus, the color filter layer is formed.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The semi-transmissive reflection plate of the present invention has a resin black film formed on one surface of a glass plate and an opposite surface of the glass plate on which the resin black film is formed. A light guide path is formed in the resin black film so that light having a light source of a backlight incident from a surface passes therethrough,
Further, after a metal film is formed on the resin black film on which the light guide path is formed, a light guide path is also formed on the metal film by etching corresponding to the light guide path formed on the resin black film. In addition, when a color filter pixel is formed on it in a later step, the metal film in that portion is removed by etching so that the resin black film functions as a black matrix in the boundary portion between adjacent color filter pixels. It is characterized by being.

In the inner surface diffusion semi-transmission type color liquid crystal display device described in the above-mentioned Japanese Patent Laid-Open No. 2000-19507, the surface of the reflective film is formed on a glass plate having a uniform and fine rough surface. Since the transparent protective film is formed on the surface, the surface is flattened, and the color filter layer is formed thereon, the light guide path formed on the reflective film is filled with the protective film material, and the individual color filters , Red (R), green (G), and blue (B) are formed on the protective film. On the other hand, in the transflective color liquid crystal display device having the transflective plate of the present invention, the color filter layer is directly formed on the metal film which is the reflective film, and the resin black film and the metal film are formed. Since the light guide formed in the above is formed so as to be filled with a single color filter material, the thickness of the color filter is increased, and in particular, a glass plate on which a metal film is formed. The effect of improving the color reproducibility of the color filter when the light incident from the surface opposite to the surface of (1) passes through the light guide path. Further, by removing the metal film at the boundary between the adjacent color filter pixels by etching, the resin black film exposed at that part functions as a black matrix, so that it is necessary to form a black matrix on the metal film. Absent. In general,
When the black matrix is formed on the metal film, the process is performed by the photolithography method.
While it is difficult to pattern the resin black with high precision, the patterning of the metal film can be performed with higher precision than the patterning of the resin black. Therefore, in the semi-transmissive reflector of the present invention, the boundary portion (that is, ,
Since the line width of the black matrix portion) can be narrowed (can be set to 8 μm to 10 μm),
The color filter pixel area per unit substrate area can be increased. Therefore, since it is possible to increase the area of the opening formed as the light guide path per unit substrate area, it is possible to effectively use both the external light and the light using the backlight as a light source, and it is possible to reflect and transmit light. Also in, the brightness can be improved. Further, if the black matrix is not sufficiently developed on the metal film, a thin film of resin black residue is formed on the metal film on which the color filter pixel is formed, and May cause a decrease in reflectance. Further, when the color filter pixel is formed in the frame formed by the black matrix, the color filter material overflows over the end portion of the black matrix, resulting in an overlapping step at that portion, resulting in a color filter. The surface flatness as described above may be impaired, resulting in lack of uniformity. On the other hand, the transflective reflector of the present invention does not have such a problem.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A transflective reflector of the present invention and a transflective color liquid crystal display device equipped with this reflector will now be specifically described with reference to the accompanying drawings. In addition,
The present invention is not limited to the description below.

FIG. 1 shows an embodiment of an external diffusion semi-transmissive reflection plate belonging to the semi-transmissive reflection plate of the present invention. The outer surface diffusion semi-transmissive reflection plate A1 is, for example, as shown in FIG.
It is manufactured as shown in FIG.

That is, first, as shown in FIG.
A resin black film 11 is formed on the glass plate 2 which is a transparent substrate. As a constituent material of the resin black film 11, a material in which carbon or titanium is dispersed in a photoresist is preferably used. A light guide path 11a is formed in the resin black film 11 so that light having a light source of a backlight incident from a surface opposite to the surface of the glass plate 2 on which the resin black film 11 is formed passes.
The resin black film 11 in which the light guide path 11a is formed can be easily formed by, for example, exposure and development by a photolithography method. Specifically, after coating the resin on the glass plate 2 by a coating method such as a spin coating method, the temperature is 80 ° C. to 120 ° C. using a heating device such as a heating furnace.
Prebaking is performed by heating for 1 minute or more in the temperature range of 1 to form a resin black layer. Next, according to a conventional method, a predetermined fine pattern (a pattern for forming the light guide path 11a on the resin black film 11) is exposed with high accuracy using a photomask, and then a portion other than the pattern portion is exposed. The resin black layer is developed by using a predetermined developing solution to remove the resin, and finally, the resin black layer is baked by post-baking by heating at about 240 ° C. for 60 minutes or more using a heating device such as a heating furnace. By the above operation, the pattern on the photomask is accurately transferred to the resin black layer to form the resin black film 11 in which the light guide path 11a is formed.

The thickness of the resin black film 11 is 0.5.
It is desirable to set the thickness to μm to 1.0 μm. With such a film thickness, the balance between the transmitted color of light from the backlight as a light source and the reflected color of external light becomes good, and excellent color reproducibility can be obtained. The pattern for forming the light guide path 11a is not particularly limited, but the size of the formed light guide path 11a should be smaller than the size of each color filter pixel formed later. It is desirable that the pattern be such that at least one or more light guide paths 11a exist in the area of each color filter pixel. in this case,
The aperture ratio of the opening formed as the light guide path 11a in the region of each color filter pixel is preferably 10% to 30%. This is because if the aperture ratio is less than 10%, the transmittance may decrease, while if the aperture ratio exceeds 30%, the reflectance may decrease.

Then, as shown in FIG. 2B, a metal film 12 to be a reflection film is formed on the resin black film 11 on which the light guide path 11a is formed. The metal film 12 is made of aluminum or silver and has a film thickness of 0.1 μm to 0.5 μm.
Those with m are desirable. Such a metal film 12 can be easily formed by, for example, a vacuum deposition method or a sputtering method.

Finally, as shown in FIG. 2C, the surface opposite to the surface of the glass plate 2 on which the metal film 12 is formed, corresponding to the light guide path 11a formed on the resin black film 11. A light guide path is formed in the metal film 12 by etching so that light from the backlight incident from the light source passes through, and the light guide path 11a formed in the resin black film is used as the light guide path 13, and in a later step. When the color filter pixel is formed on the black matrix function portion 14, the metal film in the portion is removed by etching so that the resin black film 11 functions as a black matrix in the boundary portion between the adjacent color filter pixels. Then, the manufacturing of the outer surface diffusion semi-transmissive reflection plate A1 is completed. The formation of the light guide path 13 and the formation of the black matrix functional portion 14 are preferably carried out by a photolithography method using a photomask on which a fine pattern is drawn with high precision so that both can be performed simultaneously.

The outer surface diffusion / semi-transmissive reflector A1 manufactured as described above has the resin black film 11 and the metal film 12 formed in the light guide path 1 so that the light having the backlight as a light source passes through.
Since 3 is formed, this light can be emitted through the light guide path 13 to the front side. Therefore, it becomes possible to efficiently use the external light and the light from the light source. In addition, the black matrix function part 14 includes the metal film 1
Since it is formed by etching No. 2, it is highly accurate, and there is no problem that may occur when the black matrix is formed on the metal film as described above.

FIG. 3 shows an embodiment of a color filter layer formed on the outer surface diffusion semi-transmissive reflection plate A1. Three types of color filters, namely red (R) 18
The color filter layer composed of R, green (G) 18G, and blue (B) 18B is formed directly on the metal film 12, and the light guide path 13 formed on the resin black film 11 and the metal film 12.
It is formed so that a single color filter material is filled therein. Therefore, the thickness of the color filter is increased, and in particular, the color of the color filter when the light incident from the surface opposite to the surface of the glass plate on which the metal film 12 is formed passes through the light guide path 13. Effective for improving reproducibility. In FIG. 3, the color filter layer is formed so that the color filter material does not enter the black matrix function part 14, but even if the color filter material enters the black matrix function part 14, I don't care. Further, in consideration of the surface smoothness of the color filter, the film thickness of the resin black film 11 is preferably 1.0 μm or less.

FIG. 4 shows an embodiment of an external diffusion semi-transmissive color liquid crystal display device having an external diffusion semi-transmissive reflection plate A1. This outer surface diffusion semi-transmissive color liquid crystal display device B1 has a color filter layer (18R, 18) on the outer surface diffusion semi-transmissive reflection plate A1 in the manner as shown in FIG.
G, 18B) is directly formed, and the transparent electrode layer 20 made of ITO and the alignment film 21 are formed on the color filter layer through the planarizing film 19 to form one substrate for liquid crystal display. Then, the other substrate for liquid crystal display is arranged so as to face the substrate with the liquid crystal layer 4 sealed by the sealant 3 interposed therebetween. This substrate comprises a light diffusion film 5 and a polarizing plate 6 which are sequentially provided on the upper surface of the glass substrate 1 from the top.
And a retardation plate 7 and 8, and a transparent electrode layer 15 made of ITO, a flattening film 16 and an alignment film 17 are laminated on the lower surface of the glass substrate 1. . A back light 30 such as a lamp is arranged on the back surface side of the external diffusion semi-transmissive reflection plate A1 to form the external diffusion transflective color liquid crystal display device B1. The backlight 30 consumes less power than that used in a transmissive color liquid crystal display device, and is preferably one that can uniformly illuminate the outer surface diffusion semi-transmissive reflector A1. The transparent electrode layer 20 may be omitted by providing the metal film 12 with an electrode function to form a reflective electrode plate.

The light diffusing film 5 may have diffusivity due to the unevenness of the surface, or may contain a diffusing agent inside the film and has diffusing property due to the difference in refractive index between the resin and the diffusing agent. May be Further, in order to prevent the surface of the light diffusion film 5 from being scratched, a transparent protective film may be laminated or a hard coat layer may be provided. In order to prevent reflection of external light, an anti-glare layer that forms fine irregularities on the surface to diffusely reflect external light, or an antireflection layer formed of a multilayer film of dielectric thin films may be formed. In addition,
External diffusion semi-transmissive color liquid crystal display device B1 shown in FIG.
In the above, the light diffusion film 5 is provided on the upper surface of the polarizing plate 6, but the light diffusion film 5 may be provided on the lower surface of the polarizing plate 6.

FIG. 5 shows an embodiment of an inner surface diffusion semi-transmission type reflection plate belonging to the semi-transmission type reflection plate of the present invention. In FIG. 5, 32 is a glass substrate, 41 is a resin black film, 42 is a metal film, 43 is a light guide path, and 44 is a black matrix function part. The inner surface diffusion / semitransmissive reflection plate A2 forms a light guide path in the resin black film when performing step (a) in the manufacturing process of the outer surface diffusion / semitransmission type reflection plate A1 shown in FIG. 2, for example. By forming the surface with fine irregularities, a metal film to be a reflection film in the same step (b) is formed corresponding to the fine irregularities of the resin black film so that the inner surface can diffuse, and finally with the same step (c). It is manufactured by performing similar steps.

The step of forming the light guide path on the resin black film and making the surface thereof finely rugged includes, for example, a predetermined fine pattern (for making the surface of the resin black film finely rugged and forming the light guide path. The pattern can be easily formed by a photolithography method using a photomask on which a pattern is drawn with high accuracy. Specific conditions and the like may be the same as the conditions for performing the step (a) in the manufacturing process of the outer surface diffusion semi-transmissive reflection plate A1 shown in FIG.

By forming the fine irregularities in a random pattern having a periodicity, light incident from the outside can be diffused more uniformly on the surface. Further, the formation of the resin black film having the fine irregularities on its surface and the light guide path formed thereon can be easily carried out by the exposure and development by the photolithography method as described above. Is not limited to this method. For example, JP-A-11-521
As described in Japanese Patent Publication No. 10, a transfer mold is used to form fine irregularities on the surface of a resin black layer, and then exposure and development are performed by a photolithography method to form a light guide path to form a resin black film. It may be formed. The thickness of the resin black film is 1 μm to 3 μm at the maximum (convex portion of the uneven portion) and 0 μm to 2 μm at the minimum (recessed portion of the uneven portion).
It is preferable that the height difference is m and the maximum difference in height is 2.5 μm or less from the viewpoint of preventing a decrease in reflectance. From the same viewpoint, it is desirable that the pitch of fine irregularities (distance between adjacent convex portions) be 15 μm to 25 μm. Further, the pattern for forming the light guide path may be the same as that of the outer surface diffusion semi-transmissive reflection plate A1.

The metal film 42 of the inner surface diffusion semi-transmissive reflection plate A2 manufactured as described above is formed on the resin black film 41 having fine irregularities on its surface. As described above, since the fine irregularities on the surface of the resin black film can be easily and freely formed by using a photolithography method or the like, the fine irregularities on the surface of the metal film in the inner diffusion semi-transmissive reflection plate A2 can be formed. Has an advantage that it can be easily and freely formed corresponding to the fine irregularities on the surface of the resin black film, and the light incident from the outside can be diffusely reflected by the surface of the reflective film and diffused uniformly. Further, since the light guide path 43 is formed in the resin black film 41 and the metal film 42 so that the light having the backlight as the light source passes, this light can be passed through the light guide path 43 and emitted to the front side. it can. Therefore, it becomes possible to efficiently use the external light and the light from the light source. Further, since the black matrix function section 44 is formed by etching the metal film 42, the black matrix function section 44 has high accuracy, and there is no problem that may occur when the black matrix is formed on the metal film as described above.

FIG. 6 shows an embodiment of a color filter layer formed on the inner surface diffusion semi-transmissive reflection plate A2. Three types of color filters, namely red (R) 48
The color filter layer composed of R, green (G) 48G, and blue (B) 48B is formed directly on the metal film 42, and the light guide path 43 formed on the resin black film 41 and the metal film 42.
It is formed so that a single color filter material is filled therein. Therefore, the thickness of the color filter is increased, and in particular, the color of the color filter when the light incident from the surface opposite to the surface of the glass plate on which the metal film 42 is formed passes through the light guide path 43. Effective for improving reproducibility. Although the color filter layer is formed in FIG. 6 so that the color filter material does not enter the black matrix function part 44, even if the color filter material enters the black matrix function part 44, I don't care.

FIG. 7 shows an embodiment of an internal diffusion semi-transmissive color liquid crystal display device having an internal diffusion semi-transmissive reflection plate A2. This inner surface diffusion semi-transmission type color liquid crystal display device B2 has a color filter layer (48R, 48R) on the inner surface diffusion semi-transmission type reflection plate A2 in the mode as shown in FIG.
G, 48B) is directly formed, and the transparent electrode layer 50 made of ITO and the alignment film 51 are formed on the color filter layer via the flattening film 49 to form one substrate for liquid crystal display. Then, the liquid crystal layer 34 sealed with the sealing agent 33.
The other substrate for liquid crystal display is arranged so as to face the substrate via the. This substrate includes a polarizing plate 36 and retardation plates 37 and 38 which are sequentially provided from the top on the upper surface side of the glass substrate 31, and the glass substrate 3 is provided.
A transparent electrode layer 45 made of ITO, a flattening film 46, and an alignment film 47 are laminated on the lower surface side of 1. A back light 60 such as a lamp is arranged on the back side of the inner surface diffusion semi-transmission type reflection plate A2 to form the inner surface diffusion semi-transmission type color liquid crystal display device B2. Backlight 60
Is more power-saving than that used in a transmissive color liquid crystal display device, and is preferably one that can uniformly illuminate the inner surface diffusion semi-transmissive reflector A2. The transparent electrode layer 5 is formed by providing the metal film 42 with an electrode function to form a reflective electrode plate.
A configuration in which 0 is omitted may be used.

FIG. 8 is an enlarged sectional view showing light diffusion and light transmission of the inner surface diffusion / semitransmissive reflection plate A2. Light incident from the outside is diffusely reflected by the fine irregularities on the surface of the metal film 42 formed corresponding to the fine irregularities on the surface of the resin black film 41, and diffused uniformly. Further, light incident from the outside is also diffusedly reflected at the corners of the light guide path 43 formed on the resin black film 41 and the metal film 42. And the inner surface diffusion semi-transmissive reflector A
The light having the backlight 60 arranged on the back side of 2 as a light source passes through the light guide path 43 and is emitted to the front side. At this time, since the light guide path 43 is filled with a single color filter material to increase the film thickness of the color filter, the color reproducibility of the color filter is improved. Further, since the black matrix function part 44 is formed by etching the metal film 42, it has high accuracy, prevents light leakage, and secures contrast.

[0024]

According to the present invention, a semi-transmissive reflector used in a high-quality transflective color liquid crystal display device having excellent color reproducibility of a color filter and a transflective color liquid crystal display having the above characteristics. It becomes possible to provide a device.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an external diffusion semi-transmissive reflection plate of the present invention.

FIG. 2 is a view showing one manufacturing process of the outer surface diffusion semi-transmissive reflection plate shown in FIG.

FIG. 3 is a view showing an embodiment of a color filter layer formed on the outer surface diffusion semi-transmissive reflection plate shown in FIG.

FIG. 4 is a diagram showing an embodiment of an external diffusion semi-transmissive color liquid crystal display device including the external diffusion semi-transmissive reflection plate shown in FIG.

FIG. 5 is a diagram showing an embodiment of an inner surface diffusion semi-transmission type reflection plate of the present invention.

FIG. 6 is a view showing an embodiment of a color filter layer formed on the inner surface diffusion semi-transmissive reflection plate shown in FIG.

7 is a diagram showing an embodiment of an inner surface diffusion semi-transmission type color liquid crystal display device including the inner surface diffusion semi-transmission type reflection plate shown in FIG.

FIG. 8 is an enlarged cross-sectional view showing light diffusion and light transmission of the inner surface diffusion semi-transmission type reflection plate shown in FIG.

[Explanation of symbols]

A1 Outer surface diffusion / semitransmissive reflection plate A2 Inner surface diffusion / semitransmission type reflection plate B1 Outer surface diffusion / semitransmission type color liquid crystal display device B2 Inner surface diffusion / semitransmission type color liquid crystal display device 1, 2, 31, 32 Glass substrate 4, 34 Liquid crystal 5 Light diffusion film 11, 41 Resin black film 12, 42 Metal film 13, 43 Light guide path 14, 44 Black matrix functional part 18R, 18G, 18B, 48R, 48G, 48B Color filter layer

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor, Teru Koyama             Fukushima Prefecture Iwaki City Town Takasaka Town Yokata Kida No.145             1 Inside Andes Intec Co., Ltd. (72) Inventor Hiromi Kikuchi             Fukushima Prefecture Iwaki City Town Takasaka Town Yokata Kida No.145             1 Inside Andes Intec Co., Ltd. F-term (reference) 2H042 AA09 AA15 AA26                 2H048 BA45 BA48 BB01 BB02 BB07                       BB08 BB42                 2H091 FA02Y FA14Z FA23Z FA31Z                       FA34Z FA41Z FB08 FC01                       FC02 FC26 LA17 LA19

Claims (8)

[Claims] 1. A resin black film is formed on one surface of a glass plate, and light emitted from a backlight as a light source is incident from a surface opposite to the surface of the glass plate on which the resin black film is formed. A light guide path is formed on the resin black film so as to pass therethrough, and a metal film is further formed on the resin black film on which the light guide path is formed, and then the light guide path is formed on the resin black film. Then, a light guide path is also formed in the metal film by etching, and when a color filter pixel is formed thereon in a later step, the resin black film forms a black matrix at a boundary portion between adjacent color filter pixels. A semi-transmissive reflection plate, wherein the metal film in the portion is removed by etching so as to function as. 2. The semi-transmissive reflection plate according to claim 1, wherein the surface of the metal film is flat. 3. The semi-transmissive reflection plate according to claim 1, wherein fine indentations are formed on the surface of the metal film to enable diffusion on the inner surface. 4. The semi-transmissive reflection according to claim 3, wherein the resin black film has fine irregularities on its surface and a light guide path is formed by exposure and development by a photolithography method. Board. 5. The fine irregularities are formed in a random pattern having periodicity.
The semi-transmissive reflector described. 6. A transflective color liquid crystal display device comprising the transflective reflector according to claim 1. Description: 7. A liquid crystal in which a color filter layer is directly formed on the semi-transmissive reflection plate according to claim 2, and a transparent electrode layer and an alignment film are formed on the color filter layer via a flattening film. A semi-transmissive color having a color liquid crystal display mechanism by disposing the other substrate for liquid crystal display, which is one substrate for display and is provided with a light diffusion film so as to face the substrate via a liquid crystal layer. A liquid crystal display device,
7. The transflective film according to claim 6, wherein the color filter layer is formed so that a single color filter material is filled in a light guide formed in the resin black film and the metal film. Type color liquid crystal display device. 8. A liquid crystal in which a color filter layer is directly formed on the semi-transmissive reflection plate according to claim 3, and a transparent electrode layer and an alignment film are formed on the color filter layer via a flattening film. A transflective color liquid crystal display device having a color liquid crystal display mechanism by disposing the other substrate for liquid crystal display so as to face the substrate through a liquid crystal layer as one substrate for display, 7. The transflective film according to claim 6, wherein the color filter layer is formed so that a single color filter material is filled in a light guide formed in the resin black film and the metal film. Type color liquid crystal display device.