Multi-domain liquid crystal display
View Patent ↗A thin film transistor array substrate for a liquid crystal display is provided with a gate line assembly, a data line assembly, thin film transistors, and pixel electrodes. Each pixel electrode has an opening pattern. A color filter substrate faces the thin film transistor array substrate while bearing color filters, a black matrix, and a common electrode. The common electrode has an opening pattern. The opening patterns of the pixel and the common electrodes partition the pixel region into a plurality of upper and lower domains and a plurality of left and right domains. The volume occupied by the upper and lower domains is established to be larger than the volume occupied by the left and right domains.
1. A liquid crystal display, comprising:
a first insulating substrate;
a first wiring line assembly formed on the first insulating substrate including a plurality of first wiring lines;
a second wiring line assembly crossing over the first wiring line assembly including a plurality of second wiring lines to define pixel regions and insulated from the first wiring line assembly;
a pixel electrode formed at each pixel region, the pixel electrode is formed in a substantially rectangular shape having a long side and a short side;
a thin film transistor connected to the first wiring line assembly, the second wiring line assembly, and the pixel electrode;
a second insulating substrate facing the first insulating substrate;
a common electrode formed on the second insulating substrate;
a first domain partitioning member formed at any one of the first and the second insulating substrates; and
a second domain partitioning member formed at any one of the first and the second insulating substrates,
wherein the first and the second domain partitioning members partition the pixel region into a plurality of left and right domains, directors of liquid crystal molecules in the left and right domains are arranged substantially parallel to the short side when an electric field is formed between the pixel electrode and the common electrode and a plurality of upper and lower domains directors of liquid crystal molecules in the upper and lower domains are arranged substantially parallel to the long side when an electric field is formed between the pixel electrode and the common electrode, and
an area occupied by the upper and lower domains is larger than the area occupied by the left and right domains.
2. The liquid crystal display of claim 1 , wherein the area occupied by the upper and lower domains is about 60-90% of the entire pixel region.
3. The liquid crystal display of claim 1 , wherein the area occupied by the upper and lower domains is about 80% or more of the entire pixel region.
4. The liquid crystal display of claim 1 , wherein an opening pattern is formed in the pixel electrode as the first domain partitioning member.
5. The liquid crystal display of claim 1 , wherein an opening pattern is formed in the common electrode as the second domain partitioning member.
6. The liquid crystal display of claim 1 , wherein a protrusion pattern is formed on the common electrode as the second domain partitioning member.
7. The liquid crystal display of claim 1 , wherein the pixel electrode is arranged between a plurality of first and second wiring lines and sides of the pixel electrode close to the wiring lines are patterned with the same outline as the first and second wiring lines.
8. The liquid crystal display of claim 7 , wherein an opening pattern is formed in the pixel electrode as the first domain partitioning member having first and second opening portions, the first opening partitions a narrow portion of the pixel electrode along the direction of the second wiring line and the second opening portion partitions a wide portion of the pixel electrode along the direction of the first wiring line.
9. The liquid crystal display of claim 8 , further comprising a storage capacitor line assembly crossing over the second wiring line assembly and is insulated from the second wiring line assembly,
wherein the storage capacitor line assembly includes first and second storage capacitor lines overlapped with the first and the second opening portions, respectively.
10. The liquid crystal display of claim 1 , wherein the upper and lower domains are classified into first and second upper and lower domains and the area occupied by the first upper and lower domains is larger than the area occupied by the second upper and lower domains.
11. The liquid crystal display of claim 1 , further comprising a vertically aligned liquid crystal layer.
12. A liquid crystal display, comprising:
a first insulating substrate;
a second insulating substrate formed over and facing the first insulating substrate;
a plurality of first lines formed on the first insulating substrate and extending in a first direction;
a plurality of second lines insulated from and intersecting the plurality of first lines and extending in a second direction, wherein intersections of the first and second lines define a plurality of pixel regions;
a plurality of pixel electrodes, each provided at each pixel region, and having a substantially rectangular shape with a long side and a short side;
a plurality of thin film transistors arranged in the pixel regions;
a first domain partitioning member formed on the first insulating substrate within each pixel region; and
a second domain partitioning member formed on the second insulating substrate within each pixel region,
wherein the first and second domain partitioning members partition the pixel region into a plurality of first regions, each first region comprising a first domain and a second domain arranged in the second direction, directors of liquid crystals in the first region being oriented substantially parallel to the long side of the corresponding pixel electrode when an electric field is applied to the liquid crystals, and
the first region occupies about 60% to about 90% of the corresponding pixel region.
13. The liquid crystal display of claim 12 , wherein the first domain partitioning member includes an opening formed in the pixel electrode.
14. The liquid crystal display of claim 12 , wherein the second domain partitioning member comprises an opening formed in a common electrode arranged on the second insulating substrate.
15. The liquid crystal display of claim 12 , wherein the second domain partitioning member comprises a protrusion formed on a common electrode.
16. The liquid crystal display of claim 15 , wherein the second domain partitioning member further comprises an opening formed in the common electrode.
17. The liquid crystal display of claim 15 , further comprising a storage capacitor line insulated from and crossing over at least one of the plurality of second wires.
18. The liquid crystal display of claim 16 , further comprising a vertically aligned liquid crystal layer.
19. The liquid crystal display of claim 16 , wherein the first region occupies about 80% or more of the corresponding pixel region.
20. The liquid crystal display of claim 12 , wherein the first and second domain partitioning members partition the pixel region into the plurality of first regions and a plurality of second regions, each second region comprising a third domain and a fourth domain arranged in the first direction.
21. The liquid crystal display of claim 20 , wherein directors of liquid crystals in the second region are oriented substantially parallel to the short side of the corresponding pixel electrode.