Liquid crystal display device

• US 9,304,359 B2
• Filed: 01/24/2013
• Issued: 04/05/2016
• Est. Priority Date: 12/15/2008
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Japan Display Incorporated, Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Nagami, Takahiro
• Primary Examiner(s): Nguyen, Hoan C
• Application Number:
  US13/749,161
• Publication Number:
  US 20130135569A1
• Time in Patent Office: 1,167 Days
• Field of Search: 349 42- 43, 349155-156, 349/153, 349/190
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/13398 Spacer materials; Spacer properties
• CPC Class Codes: G02F 1/1341 Filling or closing of cells

Abstract

A display device includes a display panel having a display region and a peripheral region, the display panel including a TFT substrate, a counter substrate fixed to the TFT substrate by seal material formed at the peripheral region, and liquid crystal interposed between the TFT substrate and the counter substrate. The TFT substrate includes an inorganic film and an organic film, with first column spacers being formed on the counter substrate. The organic film includes a first part which has an island-like shape formed at the peripheral region and a second part formed at the display region, and the seal material covers at least one of the first column spacers and the first part of the organic film, and is in contact with the inorganic film. The first part of the organic film is separated from the second part of the organic film of the organic film.

Claims

1. A display device comprising:

a display panel having a display region and a peripheral region, the display panel including a TFT substrate, a counter substrate fixed to the TFT substrate by seal material formed at the peripheral region, and liquid crystal interposed between the TFT substrate and the counter substrate;

wherein the TFT substrate includes an inorganic film and an organic film disposed between the inorganic film and the liquid crystal, with first column spacers being formed on the counter substrate;

wherein the organic film includes a first part which has an island-like shape formed at the peripheral region and a second part formed at the display region;

wherein the seal material is an adhesive to fix the TFT substrate and the counter substrate, and the seal material covers at least one of the first column spacers and the first part of the organic film; and

wherein the first part of the organic film is separated from the second part of the organic film, and the seal material is in contact with the inorganic film at an area between the first part of the organic film and the second part of the organic film.

2. A display device according to claim 1, wherein the inorganic film is formed between the organic film and the TFT substrate.

3. A display device according to claim 1, wherein second column spacers are formed on the counter substrate outside of the seal material at the peripheral region, and the organic film includes a third part which has an island-like shape facing the second column spacers.

4. A display device according to claim 1, wherein the TFT substrate includes a first electrode and a second electrode formed between the organic film and the liquid crystal.

5. A display device according to claim 1, wherein in the seal portion, semiconductor films are formed like islands on the TFT substrate.

6. A liquid crystal display device according to claim 1, wherein in the seal portion, color filters are formed like islands on the counter substrate.

7. A display device according to claim 2, wherein second column spacers are formed on the counter substrate outside of the seal material at the peripheral region, and the organic film includes a third part which has an island-like shape facing the second column spacers.

8. A display device according to claim 2, wherein the TFT substrate includes a first electrode and a second electrode formed between the organic film and the liquid crystal.

9. A display device according to claim 2, wherein in the seal portion, semiconductor films are formed like islands on the TFT substrate.

10. A liquid crystal display device according to claim 2, wherein in the seal portion, a color filters are formed like islands on the counter substrate.

11. A display device according to claim 4, wherein second column spacers are formed on the counter substrate outside of the seal material at the peripheral region, and the organic film includes a third part which has an island-like shape facing the second column spacers.

12. A display device according to claim 4, wherein in the seal portion, semiconductor films are formed like islands on the TFT substrate.

13. A liquid crystal display device according to claim 4, wherein in the seal portion, color filters are formed like islands on the counter substrate.

14. A liquid crystal display device according to claim 5, wherein in the seal portion, the color filters are formed like islands on a counter substrate side.