# US 7,746,419 B2 · Liquid crystal display device

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- Number: US 7,746,419 B2
- Document ID: US7746419B2
- Status: Granted
- Kind: B2
- Application number: 12/457,448
- Filed: 2009-06-11
- Published: 2009-10-15
- Granted: 2010-06-29
- Earliest claimed: 2007-02-22
- Assignees: IPS Alpha Technology, Ltd.; Hitachi Display Devices, Ltd.
- Inventors: Yuji Azuma; Shimon Itakura
- Web page: https://patentgrep.com/patent/US7746419B2

## CPC

- G02F 1/133604: {with lamps}
- G02F 1/133605: {including specially adapted reflectors}
- H01R 12/718: {Contact members provided on the PCB without an insulating housing (contacts for abutting H01R12/714)}
- G02F 1/133608: {including particular frames or supporting means}
- H01R 12/7076: {for connection between PCB and component, e.g. display}
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

A liquid crystal display device of the present invention includes a liquid crystal display panel, and a backlight arranged on a back surface of the liquid crystal display panel. The backlight includes a plurality of rod-shaped light sources, electrode fittings for holding the rod-shaped light sources, and side wall plates covering the electrode fittings. The electrode fittings are connected to a connection portion extending in the parallel-arrangement direction of the rod-shaped light sources. The side wall plate includes a plurality of projecting members arranged in parallel to each other in the extending direction of the connection portion. The connection portion includes positions which are brought into contact with the projecting members and portions which are not brought into contact with the projecting members. By adopting the above-mentioned constitution, the liquid crystal display device can reduce squeals and the like.

## Claims

### Claim 1

A liquid crystal display device comprising:
a liquid crystal display panel; and
a backlight arranged on a back surface of the liquid crystal display panel, wherein
the backlight includes a plurality of rod-shaped light sources arranged in parallel in a plane facing the liquid crystal display panel in an opposed manner, electrode fittings for holding electrode portions of the rod-shaped light sources, side wall plates covering the electrode portions, and a lower frame accommodating the rod-shaped light sources,
the electrode fittings are connected to a connection portion extending in the parallel arrangement direction of the rod-shaped light sources,
wherein the connection portion includes first connection portion arranged at one side of the electrode fitting and second connection portion arranged at the other side of the electrode fitting, and
an inner edge of the first connection portion is straight and an inner edge of the second connection portion is not straight.

### Claim 2 (depends on 1)

The liquid crystal display device according to claim 1, wherein the not straight portion of the second connection portion is dent.

### Claim 3 (depends on 2)

The liquid crystal display device according to claim 2, wherein outer edge of the second connection portion has not straight portion.

### Claim 4 (depends on 3)

The liquid crystal display device according to claim 3, wherein the not straight portion of the outer edge of the second connection portion is dent.

### Claim 5 (depends on 1)

The liquid crystal display device according to claim 1, wherein the second connection portion has dent alternatively at inner side and outer side.

### Claim 6 (depends on 5)

The liquid crystal display device according to claim 5, wherein dent of outer side of the second connection portion faces to the electrode fitting.