Liquid crystal display device and electronic device

• US 9,664,951 B2
• Filed: 08/10/2012
• Issued: 05/30/2017
• Est. Priority Date: 08/17/2011
• Status: Expired due to Fees

• Current Assignee: 138 East LCD Advancements Limited (Vector Capital Corporation)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Urano, Nobutaka, Momose, Yoichi
• Primary Examiner(s): Merlin, Jessica M
• Assistant Examiner(s): Teets, Mark
• Application Number:
  US13/572,130
• Publication Number:
  US 20130044271A1
• Time in Patent Office: 1,754 Days
• Field of Search: 362634
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• 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: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02B 6/009 of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 1/133628 with cooling means
• CPC Class Codes: G02F 2201/46 Fixing elements

Abstract

A liquid crystal display device is provided which includes a liquid crystal panel, a light guide plate having a plurality of side surfaces, a plurality of light emitting elements; a light source substrate having a mounting surface on which the plurality of the light emitting elements are mounted, a light source support member made of metal, including a substrate support plate portion supporting the light source substrate, with the substrate support plate portion coming into contact with a rear surface of the mounting surface, a first surface and a second surface different from the first surface, and a metal frame accommodating the liquid crystal panel and the light guide plate, and including a first contact portion that comes into contact with the first surface and a second contact portion that comes into contact with the second surface.

Claims

1. A liquid crystal display device comprising:

a first metal frame including a bottom plate;

a light guide plate having a main surface and a side surface, arranged such that the main surface overlaps the bottom plate of the first metal frame;

a plurality of light emitting elements arranged along the side surface and each of the plurality of the light emitting elements having a light emitting surface facing the side surface;

a light source substrate having a mounting surface on which the plurality of the light emitting elements are mounted;

a light source support member made of metal including a substrate support plate portion supporting the light source substrate, the substrate support plate portion contacting a rear surface of the light source substrate;

a liquid crystal panel disposing in an opposite direction to the first metal frame with respect to the light guide plate;

a second metal frame including a front plate covering a peripheral area of the liquid crystal panel; and

a resin frame including a plate-shaped support portion to interpose the light guide plate between the bottom plate of the first metal frame and the plate-shaped support portion, and including an opening between the light source support member and the second metal frame,

wherein the light source support member has a first contact portion that contacts the first metal frame and a second contact portion that extends through the opening and contacts a bottom surface of the second metal frame that is parallel to the main surface through the opening; and

wherein a top surface of the second contact portion that extends through the opening and contacts the bottom surface of the second metal frame does not protrude from a top surface of the resin frame.

2. The liquid crystal display device according to claim 1, wherein the light source support member is completely disposed away from the light guide plate in a plane view from a normal direction of the main surface.

3. The liquid crystal display device according to claim 1, wherein the resin frame is between the first metal frame and the second metal frame.

4. A liquid crystal display device comprising:

a liquid crystal panel;

a light guide plate having a main surface and a side surface;

a plurality of light emitting elements arranged along the side surface;

a light source substrate having a mounting surface on which the plurality of the light emitting elements are mounted;

a light source support member made of metal including a substrate support plate portion supporting the light source substrate;

a metal frame accommodating the liquid crystal panel and the light source support member, and including a front plate covering a peripheral area of the liquid crystal panel; and

a resin frame disposed between the light source support member and the front plate, and including an opening between the light source support member and the front plate,

wherein the light source support member has a contact portion that extends through the opening and contacts a bottom surface of the front plate that is parallel to the main surface through the opening; and

wherein a top surface of the contact portion that extends through the opening and contacts the bottom surface of the front plate does not protrude from a top surface of the resin frame.