Liquid crystal display device

• US 8,363,199 B2
• Filed: 10/01/2009
• Issued: 01/29/2013
• Est. Priority Date: 10/01/2008
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated), Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Yamada, Yasuyuki, Sekiya, Kuninobu
• Primary Examiner(s): Won, Bumsuk
• Assistant Examiner(s): CHANG, CHARLES S
• Application Number:
  US12/571,574
• Publication Number:
  US 20100079718A1
• Time in Patent Office: 1,216 Days
• Field of Search: 349/153, 349/138, 349/190
• US Class Current: 349/153
• CPC Class Codes: G02F 1/133388 with constructional differences between the display region and the peripheral region
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells

Abstract

Provided is a liquid crystal display device including: a first substrate and a second substrate which are arranged so as to be opposed to each other for sandwiching a liquid crystal; an image display portion; a sealing material which seals the liquid crystal; and a light-shielding film which is formed on a liquid crystal side of the second substrate so that a part of the light-shielding film extends beyond the image display portion to overlap with the sealing material, and which has openings in the image display portion, at least in regions of the multiple pixels, in which the part of the light-shielding film that overlaps with the sealing material has a recessed portion formed on a sealing material side of the light-shielding film continuously or discontinuously along a circumferential direction of the sealing material, to a depth that is smaller than a thickness of the light-shielding film.

Claims

1. A liquid crystal display device, comprising:

a first substrate and a second substrate which are arranged so as to be opposed to each other and sandwich a liquid crystal;

an image display portion which is formed by an aggregation of multiple pixels in a direction in which the liquid crystal spreads; and

a sealing material which is provided between the first substrate and the second substrate to surround the image display portion, and which seals the liquid crystal,

wherein one of wiring and a circuit and an insulating film, which covers one of the wiring and the circuit, are formed at least in a region of the first substrate where the sealing material is provided,

wherein the insulating film includes at least an inorganic insulating film placed on a front side, which is closer to the sealing material, and an organic insulating film placed below the inorganic insulating film brought into contact with the inorganic insulating film, and

wherein recessed portions are formed in a sealing material formation region along a circumferential direction of the sealing material formation region, to a depth that makes the recessed portions pass through the inorganic insulating film but not the organic insulating film,

wherein the inorganic film is formed between the recessed portions.

2. The liquid crystal display device according to claim 1,

wherein the recessed portions are formed continuously along the circumferential direction of the sealing material.

3. The liquid crystal display device according to claim 2,

wherein the recessed portions are formed such that multiple recessed portions are placed side by side in a width direction of the sealing material.

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

wherein a plurality of the recessed portions are formed discontinuously along the circumferential direction of the sealing material.

5. The liquid crystal display device according to claim 4,

wherein the recessed portions are formed such that multiple recessed portions are placed side by side in a width direction of the sealing material.

6. The liquid crystal display device according to claim 1,

wherein at least one of a plurality of the recessed portions are formed in the width direction of the sealing material at any point in the circumferential direction of the sealing material.

7. The liquid crystal display device according to claim 1,

wherein the recessed portions are formed such that dots of dot-patterned recessed portions are scattered on the sealing material formation region.

8. The liquid crystal display device according to claim 1,

wherein the recessed portion which does not pass through the organic insulating film is a partially etched portion of the organic insulating film.

9. The liquid crystal display device according to claim 8,

wherein the organic insulating film is thicker than the inorganic insulating film.

10. The liquid crystal display device according to claim 9,

wherein the insulating film further comprises another inorganic insulating film formed below the organic insulating film so that said organic insulating film is sandwiched between said inorganic insulating film and said another inorganic insulating film.

11. The liquid crystal display device according to claim 10,

wherein the organic insulating film is thicker than said another inorganic insulating film.

12. The liquid crystal display device according to claim 1,

wherein the insulating film further comprises another inorganic insulating film formed below the organic insulating film so that said organic insulating film is sandwiched between said inorganic insulating film and said another inorganic insulating film.

13. The liquid crystal display device according to claim 12,

wherein the organic insulating film is thicker than said another inorganic insulating film.