LIQUID CRYSTAL DISPLAY DEVICE AND ELECTRONIC DEVICE

• US 20130044271A1
• Filed: 08/10/2012
• Published: 02/21/2013
• Est. Priority Date: 08/17/2011
• Status: Active Grant

• Current Assignee: 138 East LCD Advancements Limited (Vector Capital Corporation)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: MOMOSE, Yoichi, URANO, Nobutaka
• Granted Patent: US 9,664,951 B2
• Time in Patent Office: Days
• US Class Current: 349/58
• 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 liquid crystal panel;

a light guide plate having a main surface through which light is emitted to the liquid crystal panel, and a plurality of side surfaces, provided on one side of the liquid crystal panel;

a plurality of light emitting elements arranged along at least one side surface among the plurality of side surfaces of the light guide plate and each of the plurality of the light emitting elements having a light emitting surface, facing the side surface, designated as a light incident portion;

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 with a plurality of surfaces, 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, with the plurality of surfaces including 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.

2. The liquid crystal display device according to claim 1, wherein the first contact portion and the second contact portion of the metal frame disposed on inside surface of the metal frame that is accommodating the liquid crystal panel and the light guide plate.

3. The liquid crystal display device according to claim 1, wherein the first surface and the second surface of the light source support member is arranged so as to adjoin each other.

4. The liquid crystal display device according to claim 1, wherein the plurality of surfaces of the light source support member includes a third surface that is arranged between the first surface and the second surface of the light source support member, so as to face the light incident portion of the light guide plate.

15. An electronic device comprising the liquid crystal display device according to claim 1.

5. A liquid crystal display device comprising:

a first metal frame including a bottom plate;

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

a plurality of light emitting elements arranged along at least one side surface among the plurality of side surfaces of the light guide plate and each of the plurality of the light emitting elements having a light emitting surface facing the side surface, designated as a light incident portion;

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

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

wherein the light source support member has a first contact surface that comes into contact with the first metal frame and a second contact surface that comes into contact with the second metal frame.

6. The liquid crystal display device according to claim 5, further comprising a resin frame which includes 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 of the resin frame, and to interpose the liquid crystal panel between the plate-shaped support portion of the resin frame and the second metal frame, wherein the light incident portion of the light guide plate arranged between the second contact surface of the light source support member and the plate-shaped support portions, in a plane view from a normal direction of the main surface.

7. The liquid crystal display device according to claim 6, wherein the resin frame is provided further to an inside than the light source support member, with respect to an in-plane direction of the light guide plate in the plane view from the normal direction of the main surface.

8. The liquid crystal display device according to claim 6,

wherein the substrate support plate portion faces the light incident portion, and

wherein the light source support member includes:

a first plate that bends from an end portion of the substrate support plate portion, which is positioned in a direction of the bottom plate of the first metal frame, so as to form the first contact surface and overlap the bottom plate; and

a second plate that bends from an end portion of the substrate support plate portion, which is positioned in a direction of the front plate of the second metal frame, so as to form the second contact surface and overlap the front plate.

9. The liquid crystal display device according to claim 8, wherein the first plate forms from the substrate support plate portion both in a direction in which the light guide plate is positioned, and in the opposite direction to the direction in which the light guide plate is positioned.

10. The liquid crystal display device according to claim 8, wherein the second plate forms from the substrate support plate portion both in a direction in which the light guide plate is positioned, and in the opposite direction to the direction in which the light guide plate is positioned.

11. The liquid crystal display device according to claim 6, wherein a planar direction of the mounting surface intersects a planar direction of the light incident portion, the second metal frame includes a side plate extending from an edge of the front plate toward the first metal frame, the light source support member is arranged such that at least a part of the substrate support plate portion overlap the bottom plate of the first metal frame serving as the first contact surface, and the light source support member includes a first plate that bends from an end portion of the substrate support plate portion, which is positioned in the opposite direction to the direction in which the light guide plate is arranged, such that at least a part of the first plate overlap the side plate of the second metal frame serving as the second contact surface.

12. The liquid crystal display device according to claim 11, wherein the light source support member further comprises a second plate that bends from a tip of the first plate in a direction in which the light guide plate is positioned, such that at least a part of the second plate and at least a part of first plate includes the second contact surface.

13. The liquid crystal display device according to claim 5, further comprising a resin frame which includes 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,

wherein the resin frame includes an opening in an area of the resin frame interposed between the light source support member and the second metal frame, and

wherein the second contact surface is a portion of the light source support member which protrudes into the opening and comes into contact with the second metal frame.

14. The liquid crystal display device according to claim 5, further comprising a resin frame which includes 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,

wherein the resin frame includes an opening in an area of the resin frame interposed between the light source support member and the second metal frame, and

wherein the second contact surface is a portion of the light source support member on which the second metal frame protrudes into the opening and comes into contact with the light source support member.