JP2001305316A - Reflection plate, reflection type display device using the same and method for manufacturing reflection plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a resin layer as the base of a reflection plate having recesses and projections on the surface and scattering property in easy processes and to easily form recesses and projections without generating moire. SOLUTION: A mixture solution is prepared by dissolving a first resin material and a second resin material having photosensitivity in a common solvent, and applied and preliminarily baked on a substrate 301 on which driving elements and terminals of the driving elements are formed. As for the second resin material, a material which is less soluble with the solvent in the mixture liquid than the first resin material is selected so that when the solvent is dried to cause phase separation by preliminary baking, the second resin material first aggregates to produce drops. Thus, a resin layer having the second resin part 308a consisting of the second resin material dispersed and held in the first resin part 308b consisting of the first resin material is formed after preliminary baking. In this process, the form of the second resin part 308a appears on the surface of the resin layer to form fine recesses and projections on the surface of the resin layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflection plate for displaying by utilizing external light, a method of manufacturing the same, and a reflection type display device provided with the reflection plate.

[0002]

2. Description of the Related Art A reflection type display element is a type which performs display by reflecting external light with a reflection plate, and has a feature of consuming less power than a self-luminous display element. Used for equipment. However, there is a drawback that the display is darker than in the transmission type because external light is used.
For this reason, it is indispensable to use a reflector having high efficiency of using external light and excellent visibility to obtain high display quality.

The reflectance can be increased by using a metal film such as aluminum or silver having a high reflectance as the reflector. However, when a mirror-like reflecting plate is used on a flat substrate, light is reflected only in the direction of regular reflection as shown in FIG. 6 (b). Therefore, when viewed from this direction, the light source is not reflected. , The display becomes difficult to see, and in other directions, there is almost no reflected light, so that the display becomes very dark. In order to solve this problem, by forming fine irregularities on the surface of the reflector, the reflected light is scattered as shown in FIG. 6A to suppress the reflection of the light source, and the brightness (reflectance) There has been proposed a reflection type liquid crystal display device having improved visibility such as a viewing angle (Japanese Patent Laid-Open No. 6-27481).
No.).

In this conventional example, as shown in FIG. 7, protrusions 414a and 414b serving as bases of unevenness are formed by driving elements 4a and 4b.
10 is formed on the substrate 411 on which the projections 414 are formed.
a, 414b, by applying a resin layer 415,
Create smooth irregularities. By forming a reflecting member 419 on this, fine irregularities are formed on the surface of the reflecting plate to form a reflecting plate having good visibility.

As described above, by forming fine and smooth irregularities on the resin layer 415 which is the base of the reflecting member 419, the reflected light can be scattered, and the reflected light can be scattered. And a reflection type display element having a wide viewing angle can be configured.

[0006]

However, in the above-mentioned conventional method, the steps of forming fine and smooth irregularities are: 1) forming projections serving as a base for the irregularities; and 2) forming a resin on the projections. Two steps of applying and smoothing the layer were required, which was redundant.

Further, the projections 414a, 41 of the prior art described above.
4b is formed by applying a photosensitive material and then exposing and developing to leave projections only at predetermined positions, but if the pattern of projections on the photomask at the time of exposure has regularity. In addition, moiré patterns are generated due to interference of light, making it very difficult to see. For this reason, irregularities are required for the fine unevenness arrangement, and in the case of the conventional example,
It was necessary to consider irregularities in the arrangement of the uneven pattern of the photomask.

The present invention has been made to solve the above-mentioned conventional problems. The present invention reduces the number of steps for forming a concavo-convex shape as compared with the related art, and easily forms a concavo-convex without irregularities so as not to cause moire. It is another object of the present invention to provide a reflective display device including the reflective plate.

[0009]

According to a first aspect of the present invention, there is provided a reflection plate, comprising: a substrate;
A resin layer formed on the substrate and having fine irregularities on its surface, and a reflecting member provided on the resin layer and reflecting light, wherein the resin layer has at least two types of resin portions. The irregularities are formed by a configuration in which they are dispersed and held.

According to a second aspect of the present invention, there is provided the reflector according to the first aspect, wherein the unevenness is formed corresponding to at least two types of arrangement of the resin portions.

According to a third aspect of the present invention, there is provided the reflector according to the first aspect, wherein a step of the unevenness is 0.7 μm or less.

[0012] With the above configuration, a configuration in which fine irregularities are formed on the surface of the reflection plate can be realized, so that a reflection plate having good reflection characteristics can be realized. In particular, it is possible to adopt a configuration in which a fine step having the unevenness of 0.7 μm or less is formed, and it is possible to obtain a reflector having better reflection characteristics.

According to a fourth aspect of the present invention, there is provided the reflector according to the first aspect, wherein the at least two kinds of the resin portions are formed by phase separation of a liquid containing at least two kinds of resin materials applied on the substrate. Characterized by being formed by:

According to the above arrangement, after applying the mixed solution on the substrate, at least two kinds of resin materials are phase-separated,
As a result, since at least two types of resin portions are formed, irregularities having no regularity can be formed on the surface of the resin layer. A reflection plate having reflection characteristics can be obtained.

According to a fifth aspect of the present invention, there is provided the reflector according to the first aspect, wherein at least two kinds of the resin portions have different shrinkage rates.

According to this configuration, irregularities on the surface of the resin layer can be easily formed.

According to a sixth aspect of the present invention, there is provided a reflective display element, wherein the reflective plate according to any one of the first to fifth aspects and a light control means provided on the reflective plate for controlling a light absorption amount. When,
It is characterized by having.

According to this configuration, fine irregularities can be formed on the surface of the reflection plate, and a reflection type display element having good reflection characteristics can be realized.

According to a seventh aspect of the present invention, there is provided the reflective display element according to the sixth aspect, wherein the resin material contains a photosensitive resin.

According to an eighth aspect of the present invention, in the reflective display element of the sixth aspect, an active element is further formed on the substrate, and the resin layer is formed so as to cover the active element. A contact hole reaching the active element is formed in the resin layer, and the active element and the reflection member are electrically connected via the contact hole.

According to this configuration, an opening (contact hole) penetrating the resin layer is formed, and the active element formed in advance on the substrate and the electrode on the resin layer are connected to each other through the opening to form an opening on the resin layer. The voltage applied to the reflective member can be controlled, and the display operation of the reflective display element can be performed by the active element on the substrate.

According to a ninth aspect of the present invention, there is provided a substrate, a resin layer formed on the substrate and having fine irregularities on a surface, and a reflecting member provided on the resin layer and reflecting light. The resin layer is a method of manufacturing a reflection plate having the unevenness formed by dispersing and holding at least two types of resin parts, wherein a mixed liquid containing at least two or more types of resin materials is prepared. A mixed liquid preparation step, a coating step of applying the mixed liquid on a substrate, and a resin forming a resin layer having irregularities on the surface by phase-separating a resin material contained in the mixed liquid applied on the substrate The method includes a layer step and a reflecting member forming step of forming a reflecting member on the resin layer.

According to this method, the step of forming a resin layer for forming surface irregularities can be realized in one step, and a reflector having no regularity of irregularities and no moire can be formed.

[0024]

(Embodiment 1) An example of an embodiment of a reflection plate and a reflection type display element of the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view of a reflection type liquid crystal display device using liquid crystal as a light control means, and shows a sectional view of one pixel at the center of a display portion. It should be noted that some parts are omitted in the drawings, and some parts of the drawings are different from actual ones.

As shown in FIG. 1, the reflection type liquid crystal display device is a so-called single-polarizer type reflection type color liquid crystal display device. A predetermined gap is provided between the substrate 301 and the counter substrate 302, and the gap has a liquid crystal layer 303 filled with liquid crystal. On the counter substrate 302, color filters 304 corresponding to each color of red R, green G, and blue B are arranged for each pixel, and a common electrode 305 made of a transparent conductive film is provided inside the color filters 304. A polarizing plate 306 and a retardation plate 307 are provided outside the counter substrate 302.

On the substrate 301, a resin layer 308 having an uneven surface is provided, and a reflection member 309 for reflecting incident light is formed on the resin layer 308. The irregularities on the surface of the resin layer 308 scatter the reflected light to suppress the reflection of the light source and to obtain the visibility such as the reflectance and the viewing angle.

The resin layer 308 is formed by forming a second resin portion 308a made of a second resin material dispersed and held in a first resin portion 308b made of a first resin material. The convex shape of the resin layer 308 is formed along the shape of the second resin portion 308a.

The second resin portion has a thickness of about 2 μm,
It is a droplet having a diameter of about 10 μm. The central portion of the droplet of the second resin portion (the top of the convex shape of the resin layer) and the portion of the resin layer 3 between the droplets (the bottom of the concave shape of the resin layer)
08 has a thickness difference of about 0.5 μm. Note that the difference in thickness, diameter, and thickness of the droplets of the second resin portion may be different from the above, and may be a non-droplet shape, for example, a rod shape.

The second resin portion is formed by phase separation from a mixed liquid of the first resin material, the second resin material, and the solvent, and the arrangement of the second resin portion is naturally generated. It has irregularities to be fixed. Note that phase separation is a phenomenon in which a mixed solution in which different materials are compatible is separated into phases in which the ratio of each material is high.

The reflecting member 309 on the resin layer 308 is
Metals whose main component is aluminum having a high reflectivity is approximately 0.1%.
The film was formed to a thickness of 2 μm. Note that a metal other than aluminum, for example, a metal containing silver as a main component, can be used for the reflection member.

The reflection member 309 is divided for each pixel, also serves as a pixel electrode, and is connected to the drain terminal 311 a of the drive element 311 on the substrate 301 through an opening (contact hole) 310 penetrating the resin layer 308. ing. With this configuration, the driving element 311 on the substrate 301 allows the reflection member 309 also serving as a pixel electrode and the common electrode 305
Can be changed, and the display operation can be performed.

With this configuration, the light incident from the counter substrate 302 side is reflected by the polarizing plate 306 and the retardation plate 3.
07, the counter substrate 302, the color filter 305, and the liquid crystal layer 303, the light is reflected by the reflection member 309, and passes through the reverse path to enter the eyes of the viewer of the reflective display element. At this time, by controlling the voltage applied to the liquid crystal layer, light absorption and transmission can be controlled. As described above, in the present embodiment, the liquid crystal layer is used as a light control unit.

Next, the resin layer 3 of the reflective display element of the present invention
The step of forming the 08 irregularities will be described with reference to FIG. FIG. 2 is a schematic explanatory view showing a step of forming a resin layer of the reflective display element according to the first embodiment of the present invention.

First, as shown in FIG. 2A, a mixed solution was prepared by dissolving a photosensitive first resin material and a second photosensitive resin material in a common solvent. Here, an acrylic positive photosensitive material is used for the first resin material, and a styrene positive photosensitive material is used for the second resin material. The ratio of the first resin material to the second resin material is 40: Adjusted to 60 weight percent. The solvent used was propylene glycol monomethyl ether acetate (PGMEA). Here, as the second resin material, a material having lower solubility in PGMEA, which is a common solvent, than the first resin material was selected. In addition, the solubility in a common solvent,
As long as the first resin material is different from the second resin material in combination, materials other than those described above can be used as the first and second resin materials and the solvent. Next, the mixed solution was applied onto the substrate 301 on which the driving elements 311 and the terminals 311a of the driving elements were previously formed, and prebaked. The application was performed by spin coating, and the substrate was prebaked on a hot plate set at a predetermined temperature. When the solvent is dried by pre-baking, the second resin material is less soluble in the solvent in the mixed liquid than the first resin material, so that the second resin material 308a ′ is not dissolved as shown in FIG. After phase separation, they aggregate and collect first.

Next, after the second resin material is aggregated to form the second resin portion 308a as shown in FIG. 2C, the first resin material 308b 'remains and becomes the first resin portion 308b. The second resin portion 308a was covered.

In this way, as shown in FIG. 2D, after the pre-bake, the second resin portion 3 made of the second resin material is placed in the first resin portion 308b made of the first resin material.
08a was dispersed and held to form a resin layer. At this time, since the first resin material and the second resin material use materials having different surface tensions, the shape of the surface of the resin layer is formed along the shape of the second resin portion, and Fine irregularities were formed on the surface.

Here, if the pre-baking is performed at a temperature of about 100 ° C., the solvent volatilizes rapidly from the mixed solution after application, so that the time required for the second resin material to coagulate is shortened.
The size of each second resin portion is reduced as shown in FIG.
When the second resin portion is small, the surface of the resin layer 8 has almost the same height as shown in FIG. 4, and no irregularities are formed. For this reason, the prebaking was performed by performing a two-stage prebaking in which a high-temperature prebaking of about 100 ° C was performed after a low-temperature prebaking at a temperature 20 to 30 ° C higher than the normal temperature after coating.

Specifically, a hot plate at 50 ° C.
After drying for 1 minute, the substrate was dried on a hot plate at 100 ° C. for 2 minutes. In this way, the solvent evaporates slowly during the low-temperature pre-bake, so that the second resin material aggregates to form the structure shown in FIG. 2C, and then the first and second resins are subjected to the high-temperature pre-bake. The solvent was volatilized from both of the materials to form the shape of FIG. 2 (d).

In the present embodiment, the low-temperature pre-bake is performed. However, even if a low-pressure drying or air-flow drying step is used instead of or in addition to this step, the solvent volatilization is higher than in the high-temperature pre-baking. Can be slow,
Droplets of the second resin material are grown to form the second resin portion, and irregularities can be formed on the surface of the resin layer as described above.

After forming a resin layer having an uneven surface on the surface by the above-described method, the resin layer on the terminal of the drive element formed in advance on the substrate 301 is formed by mask exposure, development, and rinsing for exposing only the opening. It was removed and a contact hole was opened. Next, the resin material 1 and the resin material 2 were baked for 1 hour in a thermostat at a curing temperature of 200 ° C. After baking, a reflective member 309 containing aluminum as a main component was formed on the resin film, and was patterned into a pixel shape as shown in FIG. 2E by photolithography and etching. The reflection member 9 patterned into the pixel shape is connected to the drain terminal 311 of the drive element 311 on the substrate through the contact hole formed in the resin film.
a.

Next, the substrate 3 on which the reflecting member is patterned
In No. 01, an alignment film (not shown) for aligning the liquid crystal of the liquid crystal layer in a predetermined direction was formed. On the other hand, the counter substrate 3 on which the color filter 304 and the common electrode 305 have been formed in advance.
In 02, an alignment film was formed in the same manner as the substrate 301, and the substrate 301 and the counter substrate 302 were bonded to each other while maintaining a constant gap, and liquid crystal was injected into the gap. Thereafter, the polarizing plate 306 and the retardation plate 307 were bonded on the opposing substrate 302 to complete the reflection type liquid crystal display device of the present embodiment as shown in FIG.

As described above, according to the method of manufacturing a reflective display element of the present invention, as described in JP-A-6-27481, 1) a projection serving as a base for unevenness is formed; 2) a projection There is no need to perform two steps of applying a resin layer thereon to make it smooth, and a resin layer having an uneven surface can be formed in a single step. And excellent reflection characteristics.

In the case where irregularities are formed on the surface of the resin film according to the present invention, irregular arrangement is determined spontaneously, so that irregular irregular shapes can be formed on the surface of the resin film. For this reason, there is an advantage that moire caused by the regularity of the uneven arrangement does not occur.

Further, according to the present invention, fine irregularities can be formed on the surface of the reflecting plate, and in particular, the irregularities can be made as fine as 0.7 μm or less.
A reflection plate having better reflection characteristics can be obtained.

The size of the droplets of the second resin portion is as follows:
2) The ratio of the resin material to the second resin material, and 2) the pre-bake condition of the resin layer. Of these, 2) is as described above. Regarding 1), in the present embodiment, the ratio of the second resin material to the total of the first and second resin materials is set to 40% by weight. However, when this ratio is approximately less than 50% by weight, the thickness of the film is reduced. In comparison, the thickness of the droplet is small, and no irregularities are formed on the film surface. On the other hand, when it is more than 50% by weight, the second thickness is larger than that of the film, so that irregularities can be formed on the surface of the resin layer.

In the present embodiment, a single solvent is used, but a plurality of solvents may be mixed and used. For example, a first resin material that is easily dissolved in the solvent A and a second resin material that is easily dissolved in the solvent B are
A mixed solution dissolved in a mixed solvent of the solvents A and B is prepared.
In this case, a material having a higher volatility in the solvent B than in the solvent A is selected. In this case, during prebaking, the solvent B volatilizes from the mixed solution first, and the second resin material that is hardly soluble in the solvent A starts to aggregate first. Also in this method, the resin layer in which the second resin portion is dispersed and held in the first resin portion can be formed, and the same effect as in the above embodiment can be obtained.

Although a solvent is used in the present embodiment, it is not necessary to use a solvent as long as the combination is compatible with the first resin material and the second resin material.

In the present embodiment, the resin film in which the second resin portion is dispersed and held in the first resin portion is formed by aggregating the second resin material during the pre-baking. Here, by using, as the first resin material, a material having a different shrinkage ratio due to heating during curing than the second resin material, it is possible to form larger irregularities on the surface of the resin layer. FIG. 3 shows this state. FIG. 3 is a schematic explanatory view for explaining formation of unevenness on the surface of the resin layer of the reflective display element.

As shown in FIG. 3A, after the pre-baking, no irregularities are formed on the surface of the resin layer, or even if the irregularities are slight, for example, when the contraction rate of the first resin material is large, After curing, as shown in FIG.
8b becomes smaller, and it becomes possible to form necessary irregularities on the surface of the resin layer 308.

In this embodiment, a photosensitive material is used for both the first resin material and the second resin material. With this configuration, it is possible to connect the pixel electrode and the terminal of the driving element through the opening. The size of the opening is the second
When the second resin portion is sufficiently larger than the second resin portion formed of the resin material, the second resin material does not necessarily need to be a photosensitive material. In this case, if the first resin material is a photosensitive material, the opening can be opened because the second resin portion located at the opening is simultaneously cleaned and removed during mask exposure, development, and cleaning.

The second resin material may be a liquid which is liquid after pre-baking and solidifies after firing the first and second resin materials. For example, when an epoxy resin that is liquid at normal temperature before curing is used as the second resin material, it is liquid when the second resin portion aggregates during prebaking. For this reason, when forming an opening in the resin layer,
The second resin portion located at the opening can be washed away by the developing and washing steps of the first resin portion. By the subsequent baking, the second resin portion held by the first resin portion is thermally crosslinked and solidified. According to this method, a non-photosensitive material can be used as the second resin material.

In this embodiment, a so-called active matrix type liquid crystal display element in which a voltage applied to each pixel is controlled by a driving element on a substrate corresponding to each pixel has been described as an example. The reflective display element of the present invention may be configured by a configuration having no driving element. In a configuration without a driving element, for example, a substrate provided with a comb-shaped reflecting member and a counter substrate formed with a comb-shaped transparent electrode are arranged so that the comb-shaped directions are perpendicular to each other, 2. Description of the Related Art There is a so-called passive matrix type liquid crystal display element in which liquid crystal is sealed in a gap, a liquid crystal is sealed in the gap, and a voltage is applied to each point where the electrodes of the upper and lower substrates intersect as a pixel.
In the passive matrix type, there is an STN (super twisted nematic) type liquid crystal display element in which the twist angle of the liquid crystal between the upper and lower substrates is 180 degrees or more. In the case of a configuration in which each pixel does not have a driving element, the resin layer includes
It is not necessary to form an opening that penetrates the drive element, and therefore, a material having no photosensitivity can be used for both the first resin material and the second resin material.

(Embodiment 2) A reflector, a reflective display element and a method of manufacturing the same of a reflective display element according to a second embodiment of the present invention will be described. Embodiment 2 is different from Embodiment 1 in the configuration of the resin layer, and the other parts are common. Therefore, in the second embodiment, only the step of forming the resin layer will be described with reference to FIG. FIG.
FIG. 7 is a schematic explanatory view showing a step of forming a resin layer of a reflective display element according to Embodiment 2 of the present invention.

The first resin material having photosensitivity and the second resin material
A mixed solution was prepared by dissolving the above resin material in a common solvent. Here, an acrylic positive photosensitive material is used for the first resin material, and a styrene positive photosensitive material is used for the second resin material, and the ratio of the first resin material to the second resin material is set to 50.
Adjusted to 50 weight percent. In the second embodiment, the compatibility between the first resin material and the second resin material is higher than that in the first embodiment.

Next, the mixed solution was applied onto the substrate 301 on which the driving elements 311 and the terminals 311a of the driving elements were previously formed, and prebaked. By drying the solvent by pre-baking, the first resin material and the second resin material are phase-separated from each other as shown in FIG.
As shown in (b), a first resin portion 308c made of a first resin material and a second resin portion 308c made of a second resin material are formed in a network.
A resin layer 308 separated from the resin portion 308d by phase separation was formed.

Next, the resin layer on the terminals 311a of the driving elements formed in advance on the substrate 301 is removed by mask exposure, development, and rinsing steps that expose only the openings, and contact holes are formed as shown in FIG. 310 was opened.

Next, the first resin material and the second resin material were baked for 1 hour in a thermostat at a curing temperature of 200 ° C. Fine unevenness was formed on the surface of the resin layer 308 by selecting a material having a different heat shrinkage ratio between the first resin material and the second resin material during curing. In the case of this embodiment, the second
Since the heat shrinkage of the resin material is larger than the heat shrinkage of the first resin material, the thickness of the second resin portion 308d is reduced, and as shown in FIG. Fine irregularities corresponding to the arrangement of each resin material were formed on the surface of the resin layer 308. The heat shrinkage of the first resin material may be higher than the heat shrinkage of the second resin material.

After baking, a reflection member 309 containing aluminum as a main component is formed on the resin film, and the reflection member 309 is formed by photolithography and etching as shown in FIG. 2E described in the first embodiment. The member 309 was patterned into a pixel shape. The reflecting member 309 was connected to the terminal 311a of the driving element on the substrate via the contact hole 310 formed in the resin film.

Thereafter, the same steps as those of the first embodiment were performed to complete a reflection type liquid crystal display device.

As described above, according to the configuration and the manufacturing method of the second embodiment, fine irregularities can be formed on the surface of the resin layer similarly to the first embodiment, and the same effect can be obtained.

The form of the resin layer when the resin material constituting the resin layer is applied to the substrate and phase-separated by pre-baking changes according to the type and ratio of the material. Other than the case where one of them is formed as a droplet, as in the case of the second embodiment, when two kinds of resins are irregularly intertwined and one of the resins becomes a network forming a network, There is. Thus, Embodiment 1,
In either case, fine irregularities can be formed on the surface of the resin layer in accordance with the arrangement of the two types of resin portions,
Similar effects can be obtained.

(Other Matters) (1) In the above embodiment, the reflection type liquid crystal display device using liquid crystal was shown as the light control means. However, the reflection type display device of the present invention is a display device using liquid crystal. It is not limited to the element. For example, it can be applied to an electrophoretic display that controls light absorption and transmission by moving fine particles dispersed in a solution by an electric field, and can be used for a reflective display element other than a liquid crystal display element. Can be.

(2) In the above embodiment, two types of resin parts are formed by phase separation. However, two types of resin parts can be formed by a method other than phase separation. That is,
In a state where two types of resin materials are not in a compatible state but simply mixed, for example, by heating or irradiating ultraviolet rays, two types of resin materials are separated to form two types of resin parts. Can also.

(3) In the above embodiment, the resin layer is formed of two types of resin materials, but the same effect can be obtained by using three or more types of resin materials.

(4) In the above embodiment, fine irregularities are formed on the surface of the resin layer by using materials having different heat shrinkage rates at the time of curing. However, physical properties such as viscosity, surface tension and the like depend on the material. Fine irregularities can be formed on the surface of the resin layer also by a method such as using a different material.

[0066]

According to the above construction, a resin layer having fine irregularities on its surface is formed as a base of a reflecting member in a single step, thereby simplifying the steps and providing a reflecting plate having good reflection characteristics. , And a reflective display device including the reflective plate.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a reflective display element according to Embodiment 1 of the present invention.

FIG. 2 is a schematic explanatory view showing a step of forming a resin layer of the reflective display element according to the first embodiment of the present invention.

FIG. 3 is a schematic explanatory view for explaining formation of a resin layer of a reflective display element.

FIG. 4 is a schematic explanatory view for explaining formation of unevenness on the surface of a resin layer of a reflective display element.

FIG. 5 is a schematic explanatory view showing a step of forming a resin layer of a reflective display element according to Embodiment 2 of the present invention.

6A and 6B are explanatory diagrams illustrating directions of light reflected by a reflecting member of a reflective display element, and FIG. 6A is an explanatory diagram illustrating a direction of reflecting light by a reflecting member having fine irregularities. 6 (b)
FIG. 4 is an explanatory diagram showing a light reflection direction on a reflection member having a mirror surface.

FIG. 7 is an explanatory diagram showing a configuration of a conventional reflective display element.

[Explanation of symbols]

 301 substrate 302 opposing substrate 303 liquid crystal layer 304 color filter 305 common electrode 306 polarizing plate 307 retardation plate 308 resin layer 309 reflecting member 310 opening (contact hole) 311 driving element 311a drain terminal of driving element

Claims (9)

[Claims] 1. A substrate, a resin layer formed on the substrate and having fine irregularities on a surface, and a reflecting member provided on the resin layer and reflecting light, wherein the resin layer is A reflector having a structure in which at least two kinds of resin parts are dispersedly held with each other; 2. The reflection plate according to claim 1, wherein the irregularities are formed corresponding to at least two types of arrangement of the resin portions. 3. The reflector according to claim 1, wherein a step of the unevenness is 0.7 μm or less. 4. The reflection plate according to claim 1, wherein the at least two types of resin portions are formed by phase separation of a liquid containing at least two types of resin materials applied on the substrate. . 5. The reflection plate according to claim 1, wherein the shrinkage rates of at least two types of resin portions are different from each other. 6. A reflection-type display element, comprising: the reflection plate according to claim 1; and light control means provided on the reflection plate for controlling an amount of light absorbed. 7. The reflective display device according to claim 6, wherein the resin portion includes a photosensitive resin. 8. An active element is further formed on the substrate, the resin layer is formed so as to cover the active element, and a contact hole reaching the active element is formed in the resin layer. 7. The reflective display device according to claim 6, wherein the active element and the reflective member are electrically connected via the contact hole. 9. A substrate, a resin layer formed on the substrate and having fine irregularities on the surface, and a reflecting member provided on the resin layer and reflecting light, wherein the resin layer A method of manufacturing a reflection plate having the irregularities formed by dispersing and holding at least two types of resin parts, wherein a mixed liquid preparation step of preparing a mixed liquid containing at least two types of resin materials; A coating step of applying the mixture on a substrate; a resin layer step of phase-separating a resin material contained in the mixture applied on the substrate to form a resin layer having irregularities on the surface; A method for manufacturing a reflection plate, comprising: a reflection member forming step of forming a reflection member thereon.