Transflective liquid crystal display device

• US 8,040,448 B2
• Filed: 05/09/2011
• Issued: 10/18/2011
• Est. Priority Date: 02/01/2006
• Status: Active Grant

• Current Assignee: Japan Display Incorporated, Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Hirota, Shoichi, Nagata, Tetsuya, Itou, Osamu, Imayama, Hirotaka
• Primary Examiner(s): Rude; Timothy L
• Application Number:
  US13/103,329
• Publication Number:
  US 20110211149A1
• Time in Patent Office: 162 Days
• Field of Search: None
• US Class Current: 349/39
• CPC Class Codes: G02F 1/133504 Diffusing, scattering, diffracting elements associated to illuminating devices G02F1/133606
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]

Abstract

A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer formed between the first substrate and the second substrate, and a transistor formed in a pixel. A first insulating layer is formed over the transistor, a first electrode is formed on the first insulating layer, a second insulating layer is formed on the first electrode, a second electrode is formed on the second insulating layer, and the first electrode has a plane shape and the second electrode has a line shape portion.

Claims

1. A liquid crystal display device comprising:

a first substrate;

a second substrate;

a liquid crystal layer formed between the first substrate and the second substrate; and

a transistor formed in a pixel;

wherein a first insulating layer is formed over the transistor, a first electrode is formed on the first insulating layer, a second insulating layer is formed on the first electrode, a second electrode is formed on the second insulating layer, and the first electrode has a plane shape and the second electrode has a line shape portion.

2. The liquid crystal display device according to claim 1, wherein the second insulating layer is formed of plural layers.

3. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is a transflective liquid crystal display device.

4. A liquid crystal display device comprising:

a first substrate;

a second substrate;

a liquid crystal layer formed between the first substrate and the second substrate; and

a transistor formed in a pixel;

wherein a first insulating layer is formed over the transistor, and a storage capacitance is formed on the first insulating layer.

5. The liquid crystal display device according to claim 4, wherein the storage capacitance is formed by a first electrode formed on the first insulating layer, a second insulating layer is formed on the first electrode, and a second electrode formed on the second insulating layer.

6. The liquid crystal display device according to claim 5, wherein the first electrode has a plane shape and the second electrode has a line shape portion.

7. The liquid crystal display device according to claim 6, wherein the second insulating layer is formed of plural layers.

8. The liquid crystal display device according to claim 7, wherein the liquid crystal display device is a transflective liquid crystal display device.