LIQUID CRYSTAL DISPLAY DEVICE

• US 20130258239A1
• Filed: 03/27/2013
• Published: 10/03/2013
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display East Incorporated (Japan Display Incorporated)
• Inventors: FUKAYAMA, Norihisa
• Granted Patent: US 9,081,222 B2
• Time in Patent Office: Days
• US Class Current: 349/60
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/13332 Front frames
• CPC Class Codes: G02F 1/136204 Arrangements to prevent high voltage or static electricity failures
• CPC Class Codes: G02F 2202/22 Antistatic materials or arrangements

Abstract

A conductive elastic sheet includes: an outer portion sandwiched between a resin frame portion and a metal frame portion and brought into contact with the metal frame portion; an inner portion laminated to an image display screen; and a connecting portion connecting the outer and inner portions. An upper surface of the resin frame portion is arranged at a higher position than the image display screen. The outer portion of the conductive elastic sheet is arranged at a higher position than the inner portion. The inner portion of the conductive elastic sheet is laminated to the image display screen in a flat shape. The conductive elastic sheet has a slit formed between the outer and inner portions and adjacent to the connecting portion. The connecting portion is bent in a height increasing direction from the same height position as the inner portion.

Claims

1. A liquid crystal display device comprising:

a liquid crystal display panel which has an image display screen and a back surface on a side opposite to the image display screen;

a resin frame which includes a support portion for supporting the liquid crystal display panel at a peripheral portion of the back surface, and a resin frame portion which surrounds the liquid crystal display panel;

a metal frame which includes a metal frame portion facing a peripheral portion of the image display screen of the liquid crystal display panel and the resin frame portion; and

a conductive elastic sheet which includes;

an outer portion which is sandwiched between the resin frame portion and the metal frame portion and is brought into contact with the metal frame portion;

an inner portion which is laminated to the image display screen of the liquid crystal display panel; and

a connecting portion which connects the outer portion and the inner portion;

wherein at least a portion of an upper surface of the resin frame portion is arranged at a higher position than the image display screen,

at least a portion of the outer portion of the conductive elastic sheet is arranged at a higher position than the inner portion,

the inner portion of the conductive elastic sheet is laminated to the image display screen of the liquid crystal display panel in a flat shape,

the conductive elastic sheet has a slit formed between the outer portion and the inner portion and adjacent to the connecting portion, and

at least one of the outer portion and the connecting portion of the conductive elastic sheet is bent in a height increasing direction from the same height position as the inner portion.

2. The liquid crystal display device according to claim 1, wherein the upper surface of the resin frame portion has an opposedly facing region which opposedly faces the outer portion of the conductive elastic sheet,

the opposedly facing region is formed at a higher position than the image display screen and parallel to the image display screen,

the outer portion of the conductive elastic sheet is arranged in a flat shape, and

the connecting portion is bent in the height increasing direction from the same height position as the inner portion.

3. The liquid crystal display device according to claim 1, wherein the upper surface of the resin frame portion has an opposedly facing region which opposedly faces the outer portion of the conductive elastic sheet,

the opposedly facing region has a parallel region which is formed at the same height as the image display screen and parallel to the image display screen, and an inclined region which is inclined such that a height of the inclined region is increased from the parallel region,

the outer portion of the conductive elastic sheet is arranged in a flat shape on the parallel region, is arranged in an inclined manner on the inclined region, and is bent between the parallel region and the inclined region, and

the connecting portion is arranged in a flat shape at the same height position as the inner portion, and is connected to a portion of the outer portion on the parallel region.

4. The liquid crystal display device according to claim 1, wherein the image display screen has a rectangular planar shape, and

the inner portion of the conductive elastic sheet is laminated to a center portion of a side of the rectangular image display screen.

5. The liquid crystal display device according to claim 1, wherein the outer portion of the conductive elastic sheet is elastically deformed by being compressed between the resin frame portion and the metal frame portion.

6. The liquid crystal display device according to claim 1, wherein the metal frame portion is arranged above the image display screen with a gap formed therebetween.