LIQUID CRYSTAL DISPLAY DEVICE

• US 20090207126A1
• Filed: 02/11/2009
• Published: 08/20/2009
• Est. Priority Date: 02/14/2008
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Arisato, Kozo, Ichio, Masaki
• Granted Patent: US 8,305,334 B2
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]

Abstract

The invention provides a liquid crystal display device which can reduce the manufacturing cost by reducing the number of parts and simplifying the fabrication and the assembling operation, for the conduction between a metal frame and a color filter substrate. A liquid crystal display panel has a conductive layer on a front surface of a second glass substrate. A panel frame has a side wall part extending along a side wall of the liquid crystal display panel and an upper surface part extending from the side wall part toward a front surface direction of the liquid crystal display panel, integrally formed together. The upper surface part is in contact with the conductive layer of the liquid crystal display panel. A constant potential is applied to the panel frame.

Claims

1. A liquid crystal display device comprising:

a liquid crystal display panel including a first substrate formed with a thin film transistor and a pixel electrode, a second substrate formed with a color filter, and a liquid crystal layer disposed between the first substrate and the second substrate;

a panel frame housing the liquid crystal display panel; and

a backlight supplying the liquid crystal display panel with light, wherein

the liquid crystal display panel has a conductive layer on a front surface of the second substrate,

the panel frame has a side wall part extending along a side wall of the liquid crystal display panel and an upper surface part extending from the side wall part toward an image display area of the liquid crystal display panel,

the upper surface part is in contact with the conductive layer of the liquid crystal display panel, and

a constant potential is applied to the panel frame.

2. The liquid crystal display device according to claim 1, wherein the conductive layer is an ITO film disposed on the second substrate.

3. The liquid crystal display device according to claim 1, wherein the conductive layer is a polarizer.

4. The liquid crystal display device according to claim 1, wherein the upper surface part of the panel frame covers a periphery part of the liquid crystal display panel from a front surface side and has a protruding part extending to the liquid crystal display panel.

5. The liquid crystal display device according to claim 1, wherein an edge part of the upper surface part of the panel frame is located closer to the liquid crystal display panel than a root part of the side wall part and the upper surface part is.

6. The liquid crystal display device according to claim 1, wherein the panel frame is a metal frame.

7. The liquid crystal display device according to claim 1, wherein the liquid crystal display panel is a liquid crystal display panel of a horizontal electric field type.

8. The liquid crystal display device according to claim 1, wherein the panel frame is formed to have a rectangular shape, and the upper surface part of the panel frame is formed with a slit at a corner part formed by one side of the rectangle and another side adjacent to the one side.

9. The liquid crystal display device according to claim 8, wherein the upper surface part of the panel frame covers a periphery part of the liquid crystal display panel from a front surface side and has a protruding part in contact with the liquid crystal display panel, and the protruding part is formed on the entire area of the one side.