Liquid crystal display device with partition walls made of color filter layers as a dam for the light shielding material
View Patent ↗A color filter layer is formed on a glass substrate of a counter substrate. A bank pattern is formed of the same material as a red color-filter portion, a green color filter portion and a blue color filter portion of the color filter layer at the outside of the color filter layer on the glass substrate in the same step. A light shielding material is coated in a bank between the bank pattern and the color filter layer to form a light shielding layer. The light shielding layer can be formed so as to be continuous with the peripheral edge of the color filter layer. The light shielding layer is less likely to overlap with the inside of a display frame portion of the liquid crystal panel, and the aperture ratio is less likely to be reduced. The number of manufacturing steps of the light shielding layer is reduced.
1. A method of producing a liquid crystal display device comprising, on a light transmissible substrate, pixels that are arranged in a display area for displaying an image and have a color filter layer including colored layers of a plurality of colors and the color filter layer formed by resin resist, and a light shielding layer for light-shielding a light shielded area arranged along an outside portion of the display area, the method comprising:
forming the color filter layer on the light transmissible substrate, so that when the color filter layer is formed of the colored layers of a plurality of colors, a first color filter layer and a pair of partition wall lower stage portions are formed of a first colored resin of a first color, the pair of partition wall lower stage portions spaced from each other at a predetermined interval, surround the outside portion of the display area and the light shielded area, and constitute a part of a dam pattern, and a second color filter layer and a partition wall upper stage portion are formed of a second colored resin of a second color, the partition wall upper stage portion serving as an other portion of the dam pattern on an upper surface of at least the partition wall lower stage portion at an inner peripheral side of the pair of partition wall lower stage portions; and
forming the light shielding layer, so that when the light shielding layer is formed, ink having a light shielding material is dropped from an ink jet nozzle onto an upper surface of the light transmissible substrate between the pair of partition wall lower stage portions, the light shielding layer formed so as to surround the display area at the light shielded area between an outer peripheral side of the pair of partition wall lower stage portions and the display area.
2. The liquid crystal display device producing method according to claim 1 , wherein
when the color filter layer is successively formed of the colored layers of a plurality of colors, the colored layer located at an outermost side of the color filter layer and the dam pattern are formed by laminating the colored layers of different colors; and
the light shielding material is injected between the colored layer located at the outermost side of the color filter layer thus laminated and the dam pattern to form the light shielding layer.
3. The liquid crystal display device producing method according to claim 1 , wherein
the dam pattern is a pair of partition walls that are disposed so as to be spaced from each other at the predetermined interval and surround an outside portion of the display area and the light shielded area, and side surfaces of the pair of partition walls are designed as tapered surfaces; and
when the light shielding layer is formed, ink having the light shielding resin material is dropped from the ink jet nozzle onto the upper surface of the light transmissible substrate between the pair of partition walls.
4. The liquid crystal display device producing method according to claim 1 , wherein the light transmissible substrate is an array substrate having switching elements arranged in a matrix form and pixel electrodes connected to the switching elements.
5. A method of producing a liquid crystal display device comprising, on a light transmissible substrate, pixels that are arranged in a display area for displaying an image and have a color filter layer including colored layers of a plurality of colors and the color filter layer formed by resin resist, and a light shielding layer for light-shielding a light shielded area arranged along an outside portion of the display area, the method comprising:
forming the color filter layer on the light transmissible substrate, so that when the color filter layer is formed of the colored layers of a plurality of colors, a first color filter layer and a pair of partition wall lower stage portions are formed of a first colored resin of a first color, the pair of partition wall lower stage portions spaced from each other at a predetermined interval, surround the outside portion of the display area and the light shielded area, and constitute a part of a dam pattern, and a second color filter layer and partition wall upper stage portions are formed of a second colored resin of a second color, the partition wall upper stage portions forming a groove along an associated partition wall and the partition wall upper stage portions serving as an other portion of the dam pattern on the upper surface of at least the partition wall lower stage portion at the inner peripheral side of the pair of partition wall lower stage portions; and
forming the light shielding layer, so that when the light shielding layer is formed, ink having a light shielding material is dropped from an ink jet nozzle onto an upper surface of the light transmissible substrate between the pair of partition wall lower stage portions, the light shield layer formed so as to surround the display area at the light shielded area between an outer peripheral side of the pair of partition wall lower stage portions and the display area.
6. The liquid crystal display device producing method according to claim 5 , wherein
when the color filter layer is successively formed of the colored layers of a plurality of colors, the colored layer located at an outermost side of the color filter layer and the dam pattern are formed by laminating the colored layers of different colors; and
the light shielding material is injected between the colored layer located at the outermost side of the color filter layer thus laminated and the dam pattern to form the light shielding layer.
7. The liquid crystal display device producing method according to claim 5 , wherein a distance from a jetting port of the ink jet nozzle to the upper end of the partition wall upper stage portion is set to 60 μm to 90 μm when ink is dropped from the ink jet nozzle.
8. The liquid crystal display device producing method according to claim 5 , wherein
the dam pattern is a pair of partition walls that are disposed so as to be spaced from each other at the predetermined interval and surround an outside portion of the display area and the light shielded area, and side surfaces of the pair of partition walls are designed as tapered surfaces; and
when the light shielding layer is formed, ink having the light shielding resin material is dropped from the ink jet nozzle onto the upper surface of the light transmissible substrate between the pair of partition walls.
9. The liquid crystal display device producing method according to claim 5 , wherein the light transmissible substrate is an array substrate having switching elements arranged in a matrix form and pixel electrodes connected to the switching elements.