LIQUID CRYSTAL DISPLAY DEVICE

• US 20130093983A1
• Filed: 09/04/2012
• Published: 04/18/2013
• Est. Priority Date: 10/17/2011
• Status: Abandoned Application

• Current Assignee: Japan Display Central Incorporated (Japan Display Incorporated)
• Original Assignee: Japan Display Central Incorporated (Japan Display Incorporated)
• Inventors: HIROSAWA, Jin, KIZU, Noriyuki
• Application Number:
  US13/602,629
• Publication Number:
  US 20130093983A1
• Time in Patent Office: Days
• US Class Current: 349/96
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 2201/121 common or background

Abstract

In one embodiment, a first signal line is arranged on a first insulating substrate and extending in a first direction. A second signal line extends in a second direction orthogonally crossing the first direction. A first electrode is formed between the second signal lines extending in the second direction on the first insulating substrate. A color filter layer is formed on a second insulating substrate facing the first substrate. A second electrode is formed of opaque wiring material on the color filter layer facing the first insulating substrate and extending in the second direction on the both sides sandwiching the first electrode. An edge of the color filter layer is located above the second signal line.

Claims

1. A liquid crystal display device, comprising:

a first substrate including a first insulating substrate, a first signal line arranged extending in a first direction, a second signal line extending in a second direction orthogonally crossing the first direction, and a first electrode extending in the second direction, the first and second signal lines and the first electrode being arranged on the first insulating substrate;

a second substrate including a second insulating substrate, a color filter layer formed on the second insulating substrate facing the first substrate, and a second electrode formed of opaque wiring material on the color filter layer facing the first substrate and extending in the second direction on the both sides sandwiching the first electrode, wherein an edge of the color filter layer is located above the second signal line; and

a liquid crystal layer held between the first substrate and the second substrate and having liquid crystal molecules.

2. The liquid crystal display device according to claim 1, wherein the second electrode overlaps with the edge of the color filter.

3. The liquid crystal display device according to claim 1, wherein the first electrode is formed of a pixel electrode, and the second electrode is formed of a common electrode.

4. The liquid crystal display device according to claim 1, wherein

the second substrate includes an overcoat layer arranged between the color filter layer and the second electrode, and

the second electrode is arranged on the edge of the color filter layer.

5. The liquid crystal display device according to claim 1, wherein the second electrode is arranged above the second signal line.

6. The liquid crystal display device according to claim 1, wherein the second electrode is formed of black conductive material.

7. The liquid crystal display device according to claim 1, wherein the second electrode is formed of at least one of metal materials of a group consisting of aluminum (Al), titanium (Ti), silver (Ag), molybdenum (Mo), tungsten (W), copper (Cu), and chromium (Cr), or metal alloy including at least one of the metal materials of the group.

8. The liquid crystal display device according to claim 1 further comprising a first polarizing plate arranged on an external surface of the first substrate and having a first absorption axis, and a second polarizing plate arranged on an external surface of the second substrate and having a second absorption axis in a Cross Nicol relationship with the first absorption axis, wherein the first absorption axis is substantially in parallel with the first direction or the second direction.

9. A liquid crystal display device, comprising:

a first substrate including a pair of gate lines extending in a first direction, a pair of source lines extending in a second direction orthogonally crossing the first direction, and a pixel electrode arranged between the pair of source lines extending in the second direction;

a second substrate including a color filter layer formed on the second substrate facing the first substrate, a common electrode formed of opaque wiring material on the color filter layer facing the first substrate and extending in the second direction on the both sides sandwiching the pixel electrode, wherein the common electrode is arranged on an edge of the color filter layer; and

a liquid crystal layer held between the first substrate and the second substrate and having liquid crystal molecules.

10. The liquid crystal display device according to claim 9, wherein the second substrate includes an overcoat layer arranged between the color filter layer and the common electrode.

11. The liquid crystal display device according to claim 9, wherein the common electrode is arranged above the source line.

12. The liquid crystal display device according to claim 9, wherein the common electrode is formed of black conductive material.

13. The liquid crystal display device according to claim 9, wherein the second electrode is formed of at least one of metal materials of a group consisting of aluminum (Al), titanium (Ti), silver (Ag), molybdenum (Mo), tungsten (W), copper (Cu), and chromium (Cr), or metal alloy including at least one of the metal materials of the group.

14. The liquid crystal display device according to claim 9 further comprising a first polarizing plate arranged on an external surface of the first substrate and having a first absorption axis, and a second polarizing plate arranged on an external surface of the second substrate and having a second absorption axis in a Cross Nicol relationship with the first absorption axis, wherein the first absorption axis is substantially in parallel with the first direction or the second direction.