Light source device and display apparatus

• US 9,874,677 B2
• Filed: 04/16/2014
• Issued: 01/23/2018
• Est. Priority Date: 04/16/2014
• Status: Active Grant

• Current Assignee: Sakai Display Products Corporation (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sakai Display Products Corporation (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Sasaki, Tomoo
• Primary Examiner(s): DUDEK, JAMES A
• Application Number:
  US15/121,707
• Publication Number:
  US 20170123138A1
• Time in Patent Office: 1,378 Days
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02B 6/0053 Prismatic sheet or layer; Brightness enhancement element, sheet or layer
• CPC Class Codes: G02B 6/0055 Reflecting element, sheet or layer
• 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: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/13332 Front frames

Abstract

The present invention provides a light source device which includes a light guide plate configured to emit light entered from a light source of a side face through one surface of the light guide plate, and an optical sheet disposed to face the one surface of the light guide plate, wherein the light source device includes interval holding parts which are provided along side faces of the light guide plate, and are configured so that one end portions thereof are disposed between the optical sheet and the light guide plate to maintain an interval between the optical sheet and the light guide plate, and the one end portions of the interval holding parts have a white color, such that it is possible to prevent shadows of the interval holding parts from being reflected on the display panel provided on a front side of the optical sheet, and a display apparatus including the light source device.

Claims

1. A light source device which includes a light guide plate configured to emit light entered from a light source of a side face of the light guide plate through one surface of the light guide plate, and an optical sheet disposed to face the one surface of the light guide plate, comprising:

an interval holding part which is provided along side face of the light guide plate, and is configured so that one portion thereof is disposed between the optical sheet and the light guide plate to maintain an interval between the optical sheet and the light guide plate,

wherein the interval holding part includes a first portion located between the optical sheet and the light guide plate, and a second portion which is connected to the first portion and is provided at an outside of the light guide plate, the first portion supporting the optical sheet by a tip of the first portion and holding the light guide plate through a buffer member contacting to a predetermined region of the first portion, and

in the first portion, a portion closer to the tip than a predetermined boundary position in the predetermined region has an achromatic color to be able to reflect light and a portion closer to the second portion than the predetermined boundary position has an achromatic color to be able to absorb light.

2. The light source device according to claim 1, wherein the second portion has an achromatic color to be able to absorb light.

3. The light source device according to claim 1, wherein

the first portion includes a parallel portion which is approximately parallel to the one surface of the light guide plate and an orthogonal portion which is approximately orthogonal to the one surface and includes the tip, and

the predetermined boundary position is located in the parallel portion.

4. A display apparatus comprising:

the light source device according to claim 1; and

a display panel configured to display an image using light passed through the optical sheet.

5. A display apparatus comprising:

the light source device according to claim 2; and

a display panel configured to display an image using light passed through the optical sheet.

6. A display apparatus comprising:

the light source device according to claim 3; and

a display panel configured to display an image using light passed through the optical sheet.

7. The light source device according to claim 1, wherein a groove is formed on a surface of the interval holding part facing the one surface of the light guide plate so as to astride the predetermined boundary position, and the buffer member is disposed in the groove.

8. The light source device according to claim 1, wherein the tip of the first portion protrudes from an edge of the first portion toward the optical sheet and abuts the optical sheet.