Liquid crystal display device

• US 9,097,922 B2
• Filed: 01/16/2015
• Issued: 08/04/2015
• Est. Priority Date: 12/18/2000
• Status: Expired due to Fees

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated, Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Yanagawa, Kazuhiko, Iwakabe, Yasushi, Nakayoshi, Yoshiaki, Wakagi, Masatoshi
• Primary Examiner(s): DUDEK, JAMES A
• Application Number:
  US14/598,936
• Publication Number:
  US 20150131014A1
• Time in Patent Office: 200 Days
• Field of Search: 349/151
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13306 Circuit arrangements or driving methods for the control of single liquid crystal cells G02F1/132, G02F1/133382 take precedence
• CPC Class Codes: G02F 1/1333 Constructional arrangements; Manufacturing methodsG02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133354 Arrangements for aligning or assembling substrates
• 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
• 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
• 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 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/13629 Multilayer wirings
• CPC Class Codes: G02F 1/136295 Materials; Compositions; Manufacture processes
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/503 Arrangements improving the resistance to shock
• CPC Class Codes: G02F 2202/02 organic material

Abstract

There is provided a liquid crystal display (LCD) device that prevents light leaks near spacers. The LCD device controls the optical transmissivity of a liquid crystal layer interposed between substrates disposed opposite each other, by means of an electric field generated in the layer-thickness direction of the liquid crystal layer. The LCD device includes spacers on a liquid-crystal-side surface of one substrate, signal lines formed on a liquid-crystal-side surface of the other substrate, an insulating film formed to cover the signal lines, and electrodes on the insulating film'"'"'s upper surface. Each electrode contributes to controlling the optical transmissivity of the liquid crystal layer. Each spacer has a vertex surface disposed opposite to the signal lines. A portion of each electrode extends to the upper surface of a corresponding signal line. The extended portion is opposite to a part of a spacer'"'"'s vertex surface disposed opposite to the corresponding signal line.

Claims

1. A display device comprising:

a first substrate;

a signal line formed on a surface of the first substrate;

a driver chip connecting with a terminal of the signal line, and supplying a signal to the signal line; and

an interconnection line other than the signal line formed on the surface, wherein the interconnection line is formed between the first substrate and the driver chip, and extends along a long-side direction of the driver chip between the first substrate and the driver chip, wherein the interconnection line is not electrically connected with the driver chip.

7. The display device according to the claim 1 or 3, wherein

a layer formed with the interconnection line and a layer formed with the terminal are at a same level.

8. The display device according to the claim 1, 2 or 3, further comprising:

a protective layer covering the interconnection line.

9. The display device according to the claim 1, 2 or 3, wherein

the interconnection line is selected from the group consisting of a common line, another signal line, and an inspection line.

15. The display device according to the claim 1, 2 or 3, further comprising:

a recognizing mark formed on the surface.

17. The display device according to the claim 15, wherein the recognizing mark is a cross shape.

18. The display device according to the claim 15, wherein

the recognizing mark is formed near the driver chip or a film-like substrate with a semiconductor integrated circuit.

19. The display device according to the claim 1, 2 or 3, further comprising:

a liquid crystal layer.

20. The display device according to claim 1, 2 or 3, wherein the signal supplied to the signal line is a video signal or a scanning signal.

2. A display device comprising:

a first substrate;

a signal line formed on a surface of the first substrate;

a driver chip connecting with a terminal of the signal line, and supplying a signal to the signal line; and

an interconnection line other than the signal line formed on the surface, wherein the interconnection line is formed between the first substrate and the driver chip, and extends along by a long-side direction of the driver chip between the first substrate and the driver chip, wherein

the terminal is formed on a layer separate from the interconnection line, and

the interconnection line is formed closer to the first substrate than the layer formed with the terminal.

4. The display device according to the claim 2, or 3,

wherein the interconnection line extends through an edge of the driver chip along the long-side direction in a plain view.

5. The display device according to the claim 2, or 3, further comprising:

an anisotropic conductive film contacting the terminal and the driver chip, wherein the anisotropic conductive film overlaps with the interconnection line.

6. The display device according to the claim 2, or 3, further comprising:

a protective layer covering the interconnection line, wherein the protective layer includes an inorganic material layer.

14. The display device according to the claim 6, wherein the inorganic material layer is a silicon nitride layer.

3. A display device comprising:

a first substrate;

a signal line formed on a surface of the first substrate;

a driver chip connecting with a terminal of the signal line, and supplying a signal to the signal line; and

an interconnection line other than the signal line formed on the surface, wherein the interconnection line is formed between the first substrate and the driver chip, and extends along by a long-side direction of the driver chip between the first substrate and the driver chip;

a protective layer covering the signal line; and

an anisotropic conductive film contacting the terminal and the driver chip, wherein

the protective layer includes an organic material layer,

a formation region includes the organic material layer and a non-formation region outside of the organic material layer in the protective layer, and

the anisotropic conductive film is formed on the non-formation region.

10. The display device according to the claim 3, wherein

the driver chip has a bump so as to connect with the terminal electrically, the terminal contacts the anisotropic conductive film, and

a region of the anisotropic conductive film contacts the non-formation region, and the region overlaps with the bump.

11. The display device according to the claim 3, wherein

the protective layer includes an inorganic material layer,

the inorganic material layer is disposed between the first substrate and the organic material layer, and

the inorganic material layer is formed in the formation region and the non-formation region.

12. The display device according to the claim 3, further comprising:

a second substrate facing the first substrate; and

a sealing material disposed between the first substrate and the second substrate,

wherein in a plain view a display area of the first substrate is a center portion of the first substrate relative to the sealing material, and

the display area is the formation region.

13. The display device according to the claim 3, wherein the organic material layer is a resin layer.

16. The display device according to the claim 3, wherein

the protective layer includes an inorganic material layer,

the inorganic material layer is disposed between the first substrate and the organic material layer, and

the recognizing mark is made of a metal material, and covered with the inorganic material layer.