Illumination device, display device, and television reception device

• US 10,197,721 B2
• Filed: 06/27/2014
• Issued: 02/05/2019
• Est. Priority Date: 07/05/2013
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Ikuta, Kaori
• Primary Examiner(s): Yenke, Brian P
• Assistant Examiner(s): Sanders, Justin B
• Application Number:
  US14/901,958
• Publication Number:
  US 20160274297A1
• Time in Patent Office: 1,684 Days
• Field of Search: 348731
• CPC Class Codes: G02B 6/00 Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/005 provided by one optical element, or plurality thereof, placed on the light output side of the light guide
• CPC Class Codes: G02B 6/0055 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0081 Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02B 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence
• CPC Class Codes: H04N 5/50 Tuning indicators; Automatic tuning control
• CPC Class Codes: H04N 5/64 Constructional details of receivers, e.g. cabinets or dust covers furniture aspects of television cabinets A47B81/06

Abstract

An illumination device includes: a light source; a light guide plate, at least one side face thereof being a light-entering face where light from the light source enters and one surface thereof being a light-exiting surface where light from the light source exits; and a frame-shaped member having a frame shape and including a pressing portion extending inwardly in a plan view and pressing an edge of the light-exiting surface of the light guide plate from above in a side view, an end face of the pressing portion facing inwardly and being exposed to the light-exiting surface thereunder, wherein at least part of the end face of the pressing portion has light-reflecting characteristics and has an inclined surface directed towards the light-exiting surface.

Claims

1. An illumination device, comprising:

a light source;

a light guide plate, at least one side face thereof being a light-entering face where light from the light source enters and one surface thereof being a light-exiting surface where light from the light source exits; and

a frame-shaped member having a frame shape and including a pressing portion extending inwardly in a plan view and pressing an edge of the light-exiting surface of the light guide plate from above in a side view, an end face of the pressing portion facing inwardly and being exposed to the light-exiting surface thereunder,

wherein at least part of said end face of the pressing portion has light-reflecting characteristics and has an inclined surface directed towards the light-exiting surface.

2. The illumination device according to claim 1, further comprising:

an optical sheet that exerts an optical effect on light that exits the light-exiting surface of the light guide plate,

wherein a top surface of the pressing portion supports an edge of the optical sheet.

3. The illumination device according to claim 1, wherein said at least part of said end face of the pressing portion has a curved shape that is recessed towards an inside of the exposed portion.

4. The illumination device according to claim 1, wherein said at least part of said end face of the pressing portion bulges outward from the exposed portion.

5. The illumination device according to claim 1, wherein the pressing portion of the frame-shaped member includes a first member having said end face, and the first member is attached to a remaining structure of the frame-shaped member.

6. The illumination device according to claim 1,

wherein the pressing portion of the frame-shaped member includes a reflective member that has light-reflective characteristics and that is attached to a remaining structure of the frame shaped member, said remaining structure of the frame shaped member being made of a material having light-shielding characteristics.

7. The illumination device according to claim 1, wherein, in said end face of the pressing portion, said at least part of said end face having the inclined surface is located in a position corresponding to said light source.

8. The illumination device according to claim 1, wherein said edge of the light-exiting surface that is pressed by the pressing portion of the frame-shaped member is at a side of the light-entering face of the light guide plate.

9. The illumination device according to claim 1, wherein said end face of the pressing portion is colored white.

10. The illumination device according to claim 1,

wherein the light source is arranged so as to face the light-entering face of the light guide plate, and

wherein the frame-shaped member is arranged such that a part of the frame-shaped member from which the pressing portion extends inwardly covers a gap between the light source and the light-entering face from above.

11. A display device comprising:

the illumination device according to claim 1; and

a display panel that performs display utilizing light from the illumination device.

12. The display device according to claim 11, wherein only a part of said inclined surface at the end face of the pressing portion protrudes toward a display region of the display panel in a plan view.

13. The display device according to claim 11, wherein the frame-shaped member includes a panel-supporting portion having a panel-supporting surface that supports the display panel.

14. The display device according to claim 11, wherein the display panel is a liquid crystal panel using liquid crystal.

15. A television receiver comprising:

the display device according to claim 11; and

a television tuner connected to the display device.