Substrate for liquid crystal display device and liquid crystal display device including the same
View Patent ↗The invention relates to a substrate for a liquid crystal display device used as a display part of an electronic equipment and a liquid crystal display device including the same, and has an object to provide a substrate for a liquid crystal display device in which high manufacturing yield and excellent display quality can be obtained, and a liquid crystal display device including the same. The substrate for the liquid crystal display device includes a base substrate for holding a liquid crystal in cooperation with an opposite substrate arranged to be opposite thereto, and a pillar spacer provided to maintain a cell gap between the base substrate and the opposite substrate, wherein the pillar spacer includes a first layer formed on the base substrate to linearly extend in a first direction and to have an almost constant width W in a second direction orthogonal to the first direction, and a second layer which is patterned to partially overlap with the first layer at an overlap accuracy X and in which a width in the first direction is almost constant and a length L 1 in the second direction satisfies a relation of L 1 ≧W+2X.
1. A substrate for a liquid crystal display device, comprising:
a base substrate for holding a liquid crystal in cooperation with an opposite substrate arranged to be opposite thereto; and
a pillar spacer provided to maintain a cell gap between the base substrate and the opposite substrate,
wherein the pillar spacer includes a first layer formed on the base substrate to linearly extend in a first direction and to have an almost constant width W in a second direction orthogonal to the first direction, and a second layer which is patterned to partially overlap with the first layer at an overlap accuracy X and in which a width in the first direction is almost constant and a length L 1 in the second direction satisfies a relation of L 1 ≧W+2X.
2. A substrate for a liquid crystal display device according to claim 1 , wherein the second layer linearly extends in the second direction.
3. A substrate for a liquid crystal display device according to claim 2 , wherein the first layer includes a resin overlap part in which a plurality of color filter layers are laminated.
4. A substrate for a liquid crystal display device according to claim 2 , further comprising a plurality of bus lines formed on the base substrate to intersect with each other through an insulating film,
wherein the first layer is formed on the bus lines.
5. A substrate for a liquid crystal display device according to claim 4 , further comprising a thin film transistor formed in a vicinity of each of intersecting positions of the plurality of bus lines,
wherein the first layer is formed to cover the thin film transistor.
6. A substrate for a liquid crystal display device according to claim 1 , wherein the first layer includes a resin overlap part in which a plurality of color filter layers are laminated.
7. A substrate for a liquid crystal display device according to claim 6 , further comprising a plurality of bus lines formed on the base substrate to intersect with each other through an insulating film,
wherein the first layer is formed on the bus lines.
8. A substrate for a liquid crystal display device according to claim 7 , further comprising a thin film transistor formed in a vicinity of each of intersecting positions of the plurality of bus lines,
wherein the first layer is formed to cover the thin film transistor.
9. A substrate for a liquid crystal display device according to claim 1 , further comprising a plurality of bus lines formed on the base substrate to intersect with each other through an insulating film,
wherein the first layer is formed on the bus lines.
10. A substrate for a liquid crystal display device according to claim 9 , further comprising a thin film transistor formed in a vicinity of each of intersecting positions of the plurality of bus lines,
wherein the first layer is formed to cover the thin film transistor.
11. A substrate for a liquid crystal display device according to claim 1 , wherein the second layer is patterned by using a mirror projection exposure system, and
the length L 1 satisfies a relation of L 1 ≧W+3 μm.
12. A substrate for a liquid crystal display device according to claim 1 , wherein the second layer is patterned by using a proximity exposure system, and
the length L 1 satisfies a relation of L 1 ≧W+6 μm.
13. A liquid crystal display device comprising a pair of substrates arranged to be opposite to each other, and a liquid crystal sealed between the pair of substrates,
wherein a substrate for a liquid crystal display device according to claim 1 is used as one of the pair of substrates.
14. A liquid crystal display device comprising:
a pair of substrates attached to each other at an attaching accuracy Y;
a liquid crystal sealed between the pair of substrates; and
a pillar spacer provided to maintain a cell gap between the pair of substrates,
wherein the pillar spacer includes a first layer formed on one of the pair of substrates to linearly extend in a first direction and to have an almost constant width W in a second direction orthogonal to the first direction, and a second layer which is formed on the other of the pair of substrates to partially overlap with the first layer and in which a width in the first direction is almost constant and a length L 2 in the second direction satisfies a relation of L 2 ≧W+2Y.
15. A liquid crystal display device according to claim 14 , wherein the length L 2 satisfies a relation of L 2 ≧W+8 μm.