LIQUID CRYSTAL DISPLAY DEVICE

• US 20130342784A1
• Filed: 06/18/2013
• Published: 12/26/2013
• Est. Priority Date: 06/22/2012
• Status: Abandoned Application

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: WATANABE, Saburo
• Application Number:
  US13/920,328
• Publication Number:
  US 20130342784A1
• Time in Patent Office: Days
• US Class Current: 349/58
• CPC Class Codes: G02B 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133314 Back frames
• CPC Class Codes: G02F 1/133385 with cooling means, e.g. fans

Abstract

The backlight includes a surface-mount type light emitting component that emits light in an upper surface direction, a wiring board on which the light emitting component is mounted, and a light guide plate overlapping with the liquid crystal display panel. The frame integrally includes a first portion that supports the light guide plate, a second portion facing an edge surface of the light guide plate with a gap, and a third portion that supports the liquid crystal display panel. The wiring board is attached to the second portion such that the light from the light emitting component is incident on the edge surface of the light guide plate. The metal block is fixed to the housing and a surface of the second portion of the frame, the surface being on the side opposite to a surface on which the wiring board is attached.

Claims

1. A liquid crystal display device comprising:

a liquid crystal display panel;

a sidelight type backlight used as a surface light source of the liquid crystal display panel;

a frame that supports the liquid crystal display panel and the backlight;

a housing; and

a metal block present between the frame and the housing;

wherein

the backlight includes a surface-mount type light emitting component that emits light in an upper surface direction, a wiring board on which the light emitting component is mounted, and a light guide plate arranged so as to overlap with the liquid crystal display panel,

the frame integrally includes a first portion that supports the light guide plate, a second portion facing an edge surface of the light guide plate with a gap, and a third portion that supports the liquid crystal display panel,

the wiring board is attached to the second portion such that the light from the light emitting component is incident on the edge surface of the light guide plate, and

the metal block is fixed to the housing and a surface of the second portion of the frame, the surface being on the side opposite to a surface on which the wiring board is attached.

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

the frame is formed by bending a metal plate having a uniform thickness.

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

the frame extends, from the first portion that supports the light guide plate, in a direction away from the light guide plate in a direction facing the light guide plate, bends to extend in a direction in which the edge surface of the light guide plate faces, and bends to reach the second portion.

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

the metal block is in contact with the second portion of the frame.

5. The liquid crystal display device according to claim 1, wherein

the metal block is in contact with the housing.

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

the frame supports a rear surface of the liquid crystal display panel,

the liquid crystal display device further has an outer frame that supports a front surface of the liquid crystal display panel, and

a portion of the outer frame is interposed between the metal block and the housing.