Display device, electronic apparatus and lighting device

• US 9,448,355 B2
• Filed: 01/27/2016
• Issued: 09/20/2016
• Est. Priority Date: 07/11/2011
• Status: Active Grant

• 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): TSO, LAURA K
• Application Number:
  US15/008,003
• Publication Number:
  US 20160139325A1
• Time in Patent Office: 237 Days
• Field of Search: 362/249.02, 362/611, 362/612, 362/613
• US Class Current: 1/1
• CPC Class Codes: G02B 6/0011 the light guides being planar or of plate-like form
• 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 6/009 of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: G02B 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133601 for spatial active dimming
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side

Abstract

In a lighting device of a display device, a plurality of light emitting elements are mounted on a surface of a light source substrate, and the light source substrate is supported by a light source support member by means of a positioning (fixing) structure such as a metal screw. The plurality of light emitting elements are divided into a plurality of blocks, and the emission light amount can be controlled with respect to each of the blocks. Although the head of the screw is exposed on the surface of the light source substrate, the screw is located between adjacent ones of the blocks. Therefore, even though the illuminating light intensity becomes partially discontinuous owing to the presence of the screw, degradation of display quality originating from such discontinuity can be suppressed.

Claims

1. A display device, comprising:

a lighting device; and

a display panel that faces to the lighting device,

wherein the lighting device includes;

a first light source substrate that includes a first surface on which a first light emitting element is mounted;

a second light source substrate includes a second surface on which a second light emitting element is mounted;

a first light source support member that hold the first light source substrate;

a light guide element that faces to the first surface and the second surface; and

a light source driver which controls the first light emitting element and the second light emitting element,

wherein the first light emitting element emits a first light and the second light emitting element emits a second light,

the light source driver controls each of an amount of light to be emitted from the first light emitting element and an amount of light to be emitted from the second light emitting element individually in conjunction with an image to be displayed,

a first positioning structure is located between the first light emitting element and a first side of the first light source substrate, the first side is closest to the second light source substrate among all of a plurality of sides of the first light source substrate, and the first positioning structure fixes the first light source substrate to the first light source support member.

2. The display device according to claim 1,

wherein at least a part of the first positioning structure is exposed on the first surface of the first light source substrate.

3. The display device according to claim 1,

wherein the first positioning structure fixes the first light source substrate to the first light source support member from the first surface of the first light source substrate.

4. The display device according to claim 1,

the lighting device includes a second light source support member that hold the second light source substrate,

wherein a second positioning structure is located between the second light emitting element and a second side of the second light source substrate, the second side is closest to the first light source substrate among all of a plurality of sides of the second light source substrate, and the second positioning structure fixes the second light source substrate to the second light source support member.

5. The display device according to claim 4,

wherein at least a part of the second positioning structure is exposed on the second surface of the second light source substrate.

6. The display device according to claim 4,

wherein the second positioning structure fixes the second light source substrate to the second light source support member from the second surface of the second light source substrate.