JP3188288B2 - Color filter, method of manufacturing the same, and liquid crystal display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large color filter, a method of manufacturing the same , and a liquid crystal display panel . Specifically, large color filter and a method for manufacturing the arrangement thereof of improving display quality by using a large-sized liquid crystal display device good flatness
To a liquid crystal display panel .

[0002]

2. Description of the Related Art FIG. 4 is a sectional view of a conventional color liquid crystal display device. Referring to FIG. 1, reference numerals 1 and 1 'denote transparent glass substrates. One glass substrate 1 has a transparent electrode 2 and an alignment film 3 formed in stripes, and the other glass substrate 1' has a thin metal film such as Cr. The black matrix 4 is formed by
A pixel pattern of three colors of red R, green G, and blue B is formed thereon, and a stripe-shaped electrode 2 ′ and an alignment film 3 ′ are formed thereon via a smoothing layer 6. The liquid crystal 7 is filled between 3 '. The striped transparent electrodes 2 and 2 'are orthogonal to each other and form a matrix, and the blue, green and red colors of the color filter 5 are also arranged in a matrix.

An example of a method for manufacturing a color filter of such a color liquid crystal display device will be described with reference to FIG. First
(a) As shown in the figure, a light shielding film 9 such as Cr is formed on a transparent glass substrate 8.
Is formed. Next, as shown in FIG. 2B, a photoresist is applied on the Cr film 9 and is exposed and developed using a mask to form a photoresist pattern 10. Next, as shown in FIG. 3C, the Cr film is etched to remove unnecessary portions, and a black matrix pattern 11 is formed as shown in FIG.

Next, as shown in FIG. 1E, a photocurable resist 12 of one of red, green and blue (for example, red) is applied on the black matrix pattern 11, and then a mask 13 is applied as shown in FIG. Exposure, development, and curing are performed to create a red pixel pattern 14 as shown in FIG. Similarly, green and blue patterns 15 and 16 are formed as shown in FIG. Finally (i)
As shown in the figure, a flat coating film 17 of a top coat layer is formed of a transparent resin on the red, green, and blue pixel patterns 14, 15, 16 to complete a color filter. After that, a transparent electrode 18 is formed on the flattening film 17.

[0005]

In the above-described conventional method for manufacturing a color filter, the steps of the black matrix pattern 11 formed on the glass substrate 8 cause unevenness in the pixel patterns 14, 15, 16 thereon. Therefore, even if the flattening film 17 is formed, unevenness is formed. Therefore, there is a problem that the cell thickness is not uniform when the panel is formed, and the liquid crystal display quality is deteriorated. There is also a method of polishing after forming a pixel pattern or after forming a top coat to eliminate irregularities, but the result is not good.

An object of the present invention is to provide a color filter with good flatness, a method of manufacturing the same , and a liquid crystal display panel .

[0007]

[0008]

According to a method of manufacturing a color filter of the present invention, a step of forming a black matrix pattern comprising a light-shielding film on a first substrate is provided.
Red, green and blue pixel patterns 22 and 2 on a second substrate 25
Forming the first and second transparent substrates 21 and 25 and bonding the first and second transparent substrates 21 and 25 using an adhesive or a resin 29 so that the black matrix pattern 20 and the pixel patterns 22, 23 and 24 face each other. And a process. Further, in addition to the above, the substrate is a transparent glass substrate or a transparent film.

In addition, markers 27 and 28 for positioning are formed on the first and second substrates 21 and 25, respectively. In addition, the light shielding film 26 is formed of Cr or a black light curable resist. In addition, the pixel patterns 22 , 23 , and 24 are formed by a photolithography method or a printing method using a photocurable colored resist. With this configuration, a color filter with good flatness can be obtained.

Also, a method for manufacturing a liquid crystal display panel according to the present invention.
In this embodiment, a block formed of a light shielding film 26 on the first substrate 21 is formed.
Forming a rack matrix pattern 20;
, Green and blue pixel patterns 22, 23,
Forming the first and second substrates 21 and
5, the black matrix pattern 20 and the pixel pattern
Adhesive or wood so that 22, 23 and 24 face each other
Bonding step using a fat 29.
A liquid crystal layer is sandwiched between the first substrate 21 and the second substrate 25.
Of the opposing surfaces of the first substrate 21 and the second substrate 25
At least one is provided with an electrode . Large liquid with no display unevenness by adopting this configuration
A crystal display panel is obtained.

[0011]

The first transparent substrate 21 on which the black matrix pattern 20 is formed and the red, green and blue pixel patterns 2
The second transparent substrate 25 on which 2, 23, and 24 are formed is provided with a black matrix pattern 20 and pixel patterns 22 and 2.
By bonding the color filters 3 and 24 so as to face each other to form a color filter, there is no unevenness because both surfaces remain as a transparent substrate, and thus the flatness is good.

[0012]

FIG. 1 is a sectional view showing an embodiment of a color filter according to the present invention. In this embodiment, as shown in the figure, a first transparent substrate 21 on which a black matrix 20 is formed, and a pixel pattern 22 of three colors of red R, green G, and blue B corresponding to the black matrix pattern 20. , 23, and 24 are bonded together with an adhesive or resin 29 such that the black matrix pattern 20 and the pixel patterns 22, 23, and 24 face each other.

A glass substrate is used for the first transparent substrate 21, and a glass substrate or a transparent film is used for the second transparent substrate 25. The black matrix 20 is formed by photolithography of a film formed of Cr or a black light-curable resist, and is formed of pixel patterns 22, 23, and 24.
Is formed by a printing method or a pigment dispersion method.

In this embodiment constructed as described above, the black matrix 20 and the pixel patterns 22, 23, 24 are adhered to each other between the two transparent substrates 21, 25. Has no unevenness, and good flatness can be obtained. Therefore, when used in a color liquid crystal display device, there is no display unevenness and the display quality is good.

Next, a first embodiment of a method for manufacturing a color filter according to the present invention will be described with reference to FIG. In this embodiment, first, as shown in FIG. 2A, a light-shielding film 26 (thickness 1000 mm) made of a metal such as Cr is deposited on a first transparent substrate 21 made of glass by vapor deposition or the like. Next, a photoresist is applied on the light-shielding film 26, exposed and developed using a mask, and then etched to remove an unnecessary portion of the light-shielding film 26, and as shown in FIG. The marker 27 is formed.

Next, as shown in FIG. 2C, a photocurable resist in which a red pigment is dispersed is applied on a second transparent substrate 25 made of glass or a transparent film and dried.
The red pixel pattern 22 is formed by exposing, developing, and curing using a mask. Similarly, a green pixel pattern 23 and a blue pixel pattern 24 are formed. Further, the alignment marker 28 is formed simultaneously with the pixel pattern in any color.

Next, as shown in FIG. 2D, the first transparent substrate 21 on which the black matrix pattern 20 is formed and the second transparent substrate 25 on which the pixel patterns 22, 23, 24 are formed, The black matrix pattern 20 and the pixel patterns 22, 23, and 24 face each other, are aligned with each other by the alignment markers 27 and 28, and are bonded using an adhesive or a resin 29. The bonding with the adhesive or the resin 29 may be performed only on the outer periphery of the transparent substrates 21 and 25 as shown in FIG. 5D or on the entire surface of the substrate as shown in FIG. As the resin for bonding, a thermosetting resin, a photocurable resin, or an ultraviolet curable resin is used. After bonding, the thermosetting resin is heated, the photocurable resin is light, and the ultraviolet curable resin is ultraviolet. Let it cure.

Next, a second embodiment of the method for manufacturing a color filter according to the present invention will be described with reference to FIG. In this embodiment, first, as shown in FIG. 3A, a photocurable photoresist in which a black pigment material is dispersed is applied on a first transparent substrate 21 made of glass, dried, exposed, developed and cured. Shading pattern,
Alternatively, a black matrix pattern 20 composed of a light-shielding pattern patterned by a photolithography method by applying a metal film such as Cr and a positioning marker 27 are formed. The thickness of the black matrix pattern 20 is the same as the thickness of a pixel pattern to be formed later.

Next, as shown in FIG. 3B, a photocurable colored photoresist is applied on a second transparent substrate 25 made of a transparent film, and the red, green, and blue pixel patterns 22 are formed by photolithography. 23, 24 and alignment marker 28
To form The pixel pattern may be formed by electrodeposition or printing.

Next, as shown in FIG. 3C, a first transparent substrate 21 is formed.
And the second transparent substrate 25 so that the black matrix pattern 20 and the pixel patterns 22, 23, 24 face each other, and the positioning markers 27,
The position is adjusted by 28 and bonded by an adhesive or a resin 29. An ultraviolet curing resin or the like is used as the bonding resin. It is preferable that the black matrix pattern 20 and the pixel pattern are in close contact with each other as much as possible, and the clearance is preferably such that light leakage does not affect the gap. Further, the adhesive or resin may be used to fill only the outer periphery of the transparent substrate or to fill the gap between the black matrix pattern and the pixel pattern.

According to the first and second embodiments of the method for manufacturing a color filter described above, since the surface of the color filter is the surface of a glass substrate or a transparent film, there is no unevenness and good flatness can be obtained. Also use this color filter
LCD panels have flat color filters
Therefore, good display quality without display unevenness can be obtained.

[0022]

According to the present invention, since the color filter is flattened, there is no unevenness in the display section and the cell thickness is constant. Accordingly, display unevenness due to the unevenness seen in the prior art does not occur, and the display quality can be improved. This manufacturing method is particularly effective for manufacturing color filters for large substrates.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a color filter of the present invention.

FIG. 2 is a diagram for explaining a first embodiment of a method for manufacturing a color filter of the present invention.

FIG. 3 is a drawing for explaining a second embodiment of the method for manufacturing a color filter of the present invention.

FIG. 4 is a cross-sectional view showing a conventional color liquid crystal display device.

FIG. 5 is a view for explaining a method of manufacturing a color filter of a conventional color liquid crystal display device.

[Explanation of symbols]

 Reference Signs List 20 black matrix 21 first transparent substrate 22, 23, 24 pixel pattern 25 second transparent substrate 26 light shielding film 27, 28 alignment marker 29 adhesive or resin

Claims (6)

(57) [Claims] 1. A light-shielding film (26) on a first substrate (21).
A step of forming a black matrix pattern (20) comprising: a step of forming red, green and blue pixel patterns (22, 23, 24) on a second substrate (25); The substrate (21, 25) is replaced with a black matrix pattern (20) and a pixel pattern (22, 23, 24).
And bonding together using an adhesive or a resin (29) so that the color filters face each other. 2. A method for producing a color filter according to claim 1, wherein said substrate is a transparent glass substrate or a transparent film. Wherein said first method of manufacturing a color filter according to claim 1, wherein the markers for positioning the second substrate (21, 25) (27, 28) is being formed. 4. The light-shielding film (26) is formed of Cr or a black light-curable resist.
2. The method for producing a color filter according to 1 . 5. The pixel pattern (22, 23, 24)
Claim, characterized in that it is formed by a photolithography method or a printing method using a photo-curable colored resist is 1
A method for producing the color filter according to the above. 6. A light-shielding film (26) on a first substrate (21).
A black matrix pattern (20) made of
And red, green and blue pixel patterns on the second substrate (25).
Forming a turn (22, 23, 24);
1. The second substrate (21, 25) is a black matrix
Pattern (20) and pixel pattern (22, 23, 24)
Using an adhesive or resin (29) so that they face each other
And bonding the first substrate (2
A liquid crystal layer is sandwiched between 1) and the second substrate (25).
Opposing the first substrate (21) and the second substrate (25)
At least one of the surfaces to be provided with electrodes.
A method for manufacturing a liquid crystal display panel .