JP2004317619A - Method of manufacturing substrate for liquid crystal display panel, and substrate for liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a substrate for an excellent liquid crystal display panel with improved productivity and with a lessened fear of foreign matter contamination by reducing the number of manufacturing steps of the substrate for the liquid crystal display panel. <P>SOLUTION: A reflection film 5 is formed on a reflection region 6 of a surface of a transparent substrate 2 and simultaneously a light shielding film 10 is formed on boundary parts of respective dots 3 on the transparent substrate 2 with the same material as that of the construction material of the reflection film 5. A blue color filter 11B is formed on a disposed position of a specified dot 3 out of the respective dots 3 and simultaneously absorption films 12a, 12b are formed on the boundary parts of respective dots 3 with the same material as that of the construction material of the respective blue color filters 11B. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a liquid crystal display panel substrate and a liquid crystal display panel substrate, and more particularly to a liquid crystal display panel substrate used in a reflective or transflective liquid crystal display panel that performs color display using external light. And a liquid crystal display panel substrate.
[0002]
[Prior art]
2. Description of the Related Art Generally, a liquid crystal display device for displaying information such as a specific figure or character is often used as a display device of a computer, a mobile phone, or the like. A liquid crystal display panel for selectively applying a voltage to a predetermined portion of the substrate to display information such as a specific figure or character is built in.
[0003]
In recent years, as such a liquid crystal display panel, a reflection type or transflective type liquid crystal display panel which performs display by reflecting external light has been frequently used for reasons such as saving power consumption.
[0004]
The transflective liquid crystal display panel has a reflection area for reflecting external light in each dot and a transmission area for transmitting irradiation light from the opposite viewing side of the liquid crystal display panel. are doing. Here, one dot refers to a range of one color unit in one pixel. In a liquid crystal display panel for performing color display, red (R), green (G), It refers to the range of each color unit of blue (B).
[0005]
This transflective liquid crystal display panel has a pair of transparent substrates, and at a position corresponding to each of the reflection areas on the viewing side of the transparent substrate on the opposite viewing side of the transparent substrates, a metal thin film or the like is used. Reflective film is provided. Further, a black mask film made of a photosensitive resin material or the like is provided at a boundary portion between the adjacent dots on the surface on the viewing side of the reflective film and the transparent substrate. Further, R, G, and B color filters are provided on the viewing side of the black mask film, the reflection film, and the transparent substrate so as to correspond to the dots, respectively. , A smoothing layer is sequentially provided on the surface on the viewing side. In addition, a plurality of transparent electrodes and an alignment film are sequentially disposed on the surface on the viewing side of the smoothing layer to constitute a liquid crystal display panel substrate.
[0006]
In addition, a plurality of transparent electrodes and an alignment film are sequentially disposed on the surface on the opposite viewing side of the transparent substrate on the viewing side of the pair of transparent substrates to constitute a substrate for a liquid crystal display panel.
[0007]
Further, each of the liquid crystal display panel substrates is integrally formed via a sealing material disposed around the liquid crystal display panel substrate, and a liquid crystal and a plurality of spacers are sealed inside the sealing material. Thus, a liquid crystal display panel is formed.
[0008]
When color display is performed by reflecting external light in the transflective liquid crystal display panel, the light transmitted through a color filter or the like after reflecting the external light on a reflective film in each reflective area. Is emitted from the liquid crystal display panel to perform a desired display. At this time, for example, when light transmitted through the R color filter from the viewing side of the liquid crystal display panel and reflected by the reflection film is emitted from the R color filter to the viewing side of the liquid crystal display panel via the G color filter. , R and G are mixed and displayed, and a desired color cannot be displayed. Therefore, the liquid crystal display panel prevents the colors from being mixed by absorbing light transmitted through each of the plurality of color filters by a black mask film disposed at the boundary between the dots. The colors were displayed in color.
[0009]
[Problems to be solved by the invention]
However, in the above-described liquid crystal display panel, when manufacturing the substrate for the liquid crystal display panel on the anti-viewing side, the reflection film, the black mask film, and the film of each color filter are formed on the viewing side of the transparent substrate on the anti-viewing side. Must be sequentially applied with a photosensitive resin material, exposed through a photomask and developed to remove unnecessary portions, and then post-baked.The same process is repeated several times to form each film. I had to film. For this reason, foreign substances such as dust and dust are likely to be mixed in such a repetitive process, and there is a problem that it takes a long time to repeat the same process, resulting in poor productivity.
[0010]
The present invention has been made in view of these points, and provides a method for manufacturing a liquid crystal display panel substrate and a liquid crystal display panel substrate that can improve productivity and reduce the risk of contamination by foreign substances. The purpose is to:
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a method of manufacturing a substrate for a liquid crystal display panel according to the invention according to claim 1, wherein a reflective film is formed on a predetermined portion of a surface on a viewing side of the substrate, and a boundary of each dot on the substrate. A light-shielding film is formed on the light-shielding film by using the same material as the constituent material of the reflection film, a B color filter is formed at a position where each predetermined dot among the dots is disposed, and the B color filter is formed on the light-shielding film. An absorbing film made of a filter is formed, and an R or G color filter is formed at an arrangement position of each of the predetermined dots.
[0012]
Here, the predetermined portion on which the reflective film is formed refers to each reflective region of the liquid crystal display panel when the substrate for a liquid crystal display panel is used for a transflective liquid crystal display panel, and is used for a reflective liquid crystal display panel. When used, it refers to the entire surface of the substrate.
[0013]
According to the first aspect of the present invention, the light-shielding film can be formed in the same step as the reflective film, and the absorbing film can be formed in the same step as each color filter of B. The step of forming a black mask as an absorption film can be omitted, and thus the number of steps of manufacturing a liquid crystal display panel substrate can be reduced.
[0014]
In a second aspect of the present invention, in the method of manufacturing a liquid crystal display panel substrate, at least one of the R and G color filters is stacked on the light-shielding film to form the absorption film. It is characterized by.
[0015]
According to the second aspect of the present invention, since the absorbing film is constituted by at least one of the B, R, and G color filters, the light absorptivity of the absorbing film is further increased to transmit the light through the plurality of color filters. It is possible to further prevent the colors of the light to be mixed from being mixed.
[0016]
According to a third aspect of the present invention, in the liquid crystal display panel substrate, a reflective film is provided on a predetermined portion of a surface on a viewing side of the substrate, and the reflective film is formed on a boundary portion of each dot on the substrate. A light-shielding film made of the same material as the material is provided, a B color filter is provided at a position where each predetermined dot is disposed among the dots, and the B color filter is provided on the light-shielding film. An absorbing film made of a filter is provided, and R or G color filters are provided at the positions of the predetermined dots among the dots.
[0017]
According to the third aspect of the present invention, the light-shielding film can be formed in the same step as the reflective film, and the absorbing film can be formed in the same step as each color filter of B. The step of forming a black mask as an absorption film can be omitted, and thus the number of steps of manufacturing a liquid crystal display panel substrate can be reduced.
[0018]
Further, in the liquid crystal display panel substrate according to the invention of claim 4, the absorption film is a laminate of the B color filter and at least one of the R or G color filters. I do.
[0019]
According to the fourth aspect of the present invention, since the absorption film is constituted by at least one of the color filters of B, R and G, the light absorption in the absorption film is further increased and the light is transmitted through the plurality of color filters. It is possible to further prevent the colors of the light to be mixed from being mixed.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a liquid crystal display panel substrate according to the present invention will be described with reference to FIGS. Here, in the present embodiment, a liquid crystal display panel substrate used for a transflective liquid crystal display panel will be described, and the viewing side of the liquid crystal display panel will be the front side.
[0021]
FIG. 1 is a plan view showing a main part of the liquid crystal display panel substrate according to the present embodiment, FIG. 2 is a cross-sectional view taken along AA of the liquid crystal display panel substrate of FIG. 1, and FIG. FIG. 2 is a sectional view taken along line BB of the liquid crystal display panel substrate of FIG.
[0022]
As shown in FIGS. 1, 2 and 3, the present liquid crystal display panel substrate 1 has a transparent substrate 2 made of glass or the like, and on both sides of each dot 3 on the surface of the transparent substrate 2, A reflection film 5 made of a metal thin film is provided so as to straddle the boundary between the adjacent dots 3, and each reflection region 6 reflects external light. An opening 7 is formed between each reflection area 6 in each dot 3 to be each transmission area 8 for transmitting irradiation light from the back side of the transflective liquid crystal display panel. .
[0023]
Further, a light-shielding film 10 made of the same material as the metal thin film forming the reflection film 5 is provided at both ends of each of the dots 3 and at a boundary between the adjacent dots 3. The light-shielding film 10 shields light emitted from the back side of the transflective liquid crystal display panel using the liquid crystal display panel substrate 1.
[0024]
Thus, the metal thin films forming the reflection film 5 and the light shielding film 10 are integrally formed in a planar shape in a lattice shape.
[0025]
Further, on the surface of the reflection area 6 in the reflection film 5 and the surface of each transmission area 8 in the transparent substrate 2, R, G, and B color filters 11R, 11G, and 11B for one dot 3 are arranged. Is established.
[0026]
Further, the B color filter 11B is provided on the surface of the light shielding film 10, and the B color filter 11B is provided on both sides of each dot 3 and at the boundary between the adjacent dots 3. The color filter 11B, the color filter 11R of R, and the color filter 11G of G are sequentially laminated and disposed to form an absorption film 12, which is a laminate of color filters. Here, the B color filter 11B has a higher light absorptivity than the R and G color filters 11R and 11G, and the R and G color filters 11R and 11G are provided on the surface of the B color filter 11B. Since the layers are stacked, the light absorptivity of the absorbing film 12 is further increased. The absorption film 12 reflects the light colored by being reflected by the reflection film 5 or transmitted through the openings 7 and transmitted through, for example, the R color filter 11R in each dot 3. Before reaching the G color filter 11G of the dot to be transmitted and transmitting through the G color filter 11G, the function of absorbing the coloring in the R color filter 11R is achieved.
[0027]
A smoothing layer 14 is provided on the surface of each of the color filters 11R, 11G, 11B and each of the absorbing films 12, and a plurality of transparent electrodes (not shown) and alignment layers are provided on the surface of the smoothing layer 14. Films are sequentially arranged, whereby the liquid crystal display panel substrate 1 is formed, and is used as the liquid crystal display panel substrate 1 on the back side of the transflective liquid crystal display panel.
[0028]
Further, the other liquid crystal display panel substrate (not shown) used for the transflective liquid crystal display panel has a structure in which a plurality of transparent electrodes and an alignment film are sequentially arranged on the back surface of a transparent substrate made of glass or the like. Accordingly, the substrate is a liquid crystal display panel substrate on the front side of the transflective liquid crystal display panel. A sealing material (not shown) is arranged and integrally formed at a peripheral portion of the facing surface of each of the liquid crystal display panel substrates, and a liquid crystal and a plurality of liquid crystals (not shown) are provided inside the sealing material. Spacers are enclosed to form a transflective liquid crystal display panel.
[0029]
Next, a method for manufacturing the liquid crystal display panel substrate 1 according to the present embodiment will be described.
[0030]
First, a metal thin film is formed on the surface of the transparent substrate 2 by a sputtering method or the like, and a resist is applied to the surface of the metal thin film. Next, using a photomask, the resist is exposed, developed, and post-baked, and the metal thin film in the portion of each transmission region 8 is etched to form each opening 7. After that, the remaining resist is removed to form the reflection film 5 on each reflection area 6, and the light-shielding film 10 is formed on both ends of each dot 3 at the boundary between adjacent dots 3. It is formed integrally with the film 5.
[0031]
Subsequently, a photosensitive resin of B is applied to the surfaces of the reflective film 5 and the transparent substrate 2, and a predetermined arranging position of each dot 3 and a boundary portion of all the dots 3 are applied by using a photolithography method. The B color filter 11B is formed.
[0032]
Further, an R photosensitive resin is applied to the surfaces of the reflection film 5 and the transparent substrate 2, and R color filters 11 R are formed at predetermined positions of the respective dots 3 by using a photolithography method. An R color filter 11R is formed on the surface of the B color filter 11B at the boundary between both sides of each dot 3. Further, the G color filters 11G are formed at the predetermined positions of the respective dots 3 by the same process, and the G color filters 11G are formed on the surfaces of the R color filters 11R and at the boundary portions on both sides of the respective dots 3. The G color filter 11G is formed. Thereby, each of the color filters 11B of B formed at the boundary portion in the vertical direction (see FIG. 1) of each of the dots 3 is used as the first absorbing film 12a, and the horizontal direction of each of the dots 3 (see FIG. 1). The laminated body of the B, R, and G color filters 11B, 11R, and 11G formed at the boundary portion is referred to as a second absorption film 12b.
[0033]
Then, a smoothing layer 14 is formed on the surface of each of the R, G, B color filters 11R, 11G, 11B, and then a plurality of transparent electrodes and an alignment film are sequentially formed on the surface of the smoothing layer 14. Then, the liquid crystal display panel substrate 1 on the back side of the transflective liquid crystal display panel is formed.
[0034]
According to the present embodiment, the light-shielding film 10 can be formed in the same process as that of the reflection film 5, and the first absorption film 12a and the second absorption film 12b are formed of the B, R, and G color filters 11R, 11G, and 11G. Since it can be formed in the same step as 11B, the step of forming a black mask can be omitted, thereby reducing the number of steps of manufacturing the liquid crystal display panel substrate 1.
[0035]
Therefore, the productivity of the liquid crystal display panel substrate 1 can be improved, and the chance of foreign substances being mixed is reduced by omitting the step of forming the black mask, thereby producing a good liquid crystal display panel substrate 1. be able to.
[0036]
Further, in the present embodiment, since the second absorption film 12b is constituted by the B, R, and G color filters 11B, 11R, and 11G, the light absorption rate of the second absorption film 12b is further increased so that the plurality of light absorption ratios are increased. The color mixture of the light transmitted through the color filters 11R, 11G, and 11B can be prevented, and as a result, the liquid crystal display panel using the liquid crystal display panel substrate 1 can perform good color display.
[0037]
Note that the present invention is not limited to the above embodiment, and can be variously modified as needed.
[0038]
For example, the arrangement positions of the reflection area 6 and the transmission area 8 within each dot 3 are not limited to the arrangement positions in the present embodiment.
[0039]
In addition, although the first absorption film 12a and the second absorption film 12b, which is a laminate, are mixed in the liquid crystal display panel substrate 1, only the first absorption film 12a may be provided, or the second absorption film 12a may be provided. Only 12b may be provided. Further, a two-layer body of B and G may be used as the second absorption film 12b. In the case of a two-layer body, it is better to select a color filter having a low transmittance.
[0040]
Further, in the present embodiment, the liquid crystal display panel substrate used for the transflective liquid crystal display panel has been described. However, the present invention is not limited to this, and may be used for a reflective liquid crystal display panel. . In the case of this reflection type liquid crystal display panel, the reflection film is disposed on the entire surface of the transparent substrate.
[0041]
【The invention's effect】
As described above, according to the method of manufacturing a substrate for a liquid crystal display panel according to the first aspect of the present invention, the number of manufacturing steps of the substrate for a liquid crystal display panel can be reduced, so that the production of the substrate for a liquid crystal display panel can be reduced. In addition to improving the performance, it is possible to manufacture a good liquid crystal display panel substrate by omitting the step of forming a black mask, thereby reducing the chance of entry of foreign matter.
[0042]
According to the method for manufacturing a substrate for a liquid crystal display panel according to the second aspect of the present invention, the absorption film is constituted by each of the color filters of at least one of B and R or G. The liquid crystal display panel using the substrate for the liquid crystal display panel can provide a good color display by increasing the absorptance of the liquid crystal and preventing the colors of the light transmitted through the plurality of color filters from being mixed. It can be performed.
[0043]
Further, according to the liquid crystal display panel substrate according to the third aspect of the present invention, the number of steps for manufacturing the liquid crystal display panel substrate can be reduced, and thus the productivity of the liquid crystal display panel substrate can be improved. In addition, by omitting the step of forming a black mask, it is possible to reduce the chance of entry of foreign matter and to manufacture a favorable liquid crystal display panel substrate.
[0044]
Furthermore, according to the liquid crystal display panel substrate according to the fourth aspect of the present invention, since the absorbing film is constituted by each of the color filters of at least one of B and R or G, light absorption in the absorbing film is achieved. It is possible to prevent the colors of light passing through a plurality of color filters from being mixed by increasing the efficiency, and as a result, the liquid crystal display panel using the liquid crystal display panel substrate performs excellent color display. be able to.
[Brief description of the drawings]
FIG. 1 is a plan view showing a main part of a liquid crystal display panel substrate according to the present invention. FIG. 2 is a cross-sectional view taken along line AA of the liquid crystal display panel substrate shown in FIG. 1. FIG. Sectional view at BB showing the substrate for use.
REFERENCE SIGNS LIST 1 Liquid crystal display panel substrate 2 Transparent substrate 3 Dots 5 Reflective film 6 Reflective area 7 Opening 8 Transmissive area 10 Light-shielding film 11B Color filter 11R B Color filter 11G Color filter 12a, 12b Absorption film 14 Smoothing layer

Claims (4)

Forming a reflective film on a predetermined portion of the surface on the viewing side of the substrate,
Forming a light-shielding film at the boundary portion of each dot on the substrate with the same material as the constituent material of the reflection film;
Forming a blue color filter at a predetermined position of each of the dots;
Forming an absorbing film made of the blue color filter on the light shielding film,
A method for manufacturing a substrate for a liquid crystal display panel, wherein a red or green color filter is formed at an arrangement position of a predetermined one of the dots. 2. The method according to claim 1, wherein at least one of the red and green color filters is laminated on the light-shielding film to form the absorption film. 3. A reflective film is provided on a predetermined portion of the surface on the viewing side of the substrate, and a light-shielding film made of the same material as that of the reflective film is provided on a boundary portion of each dot on the substrate,
A blue color filter is disposed at a predetermined dot arrangement position among the dots, and an absorption film made of the blue color filter is disposed on the light shielding film,
A substrate for a liquid crystal display panel, wherein a red or green color filter is provided at an arrangement position of a predetermined dot among the dots. 4. The liquid crystal display panel substrate according to claim 3, wherein the absorption film is a laminate of a blue color filter and at least one of the red or green color filters.

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