Display Device

• US 20090052206A1
• Filed: 08/12/2008
• Published: 02/26/2009
• Est. Priority Date: 08/20/2007
• Status: Active Grant

• Current Assignee: Meitaku Industry Co., Ltd.
• Original Assignee: Meitaku Industry Co., Ltd.
• Inventors: Murase, Shinzo, Matsui, Hirokazu
• Granted Patent: US 7,883,252 B2
• Time in Patent Office: Days
• US Class Current: 362/612
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G09F 13/0413 Frames or casing structures therefor
• CPC Class Codes: G09F 13/18 Edge-illuminated signs
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00

Abstract

A wall-mounted display device, which uses a light guiding panel for an LED light source includes display body 1 with an optical panel 11 housed in a box-like optical diffusion case 15 with flanges 14 formed on the periphery of a substrate 13. A reflection case 12 fits in the optical diffusion case 15, which has a U-shaped cross section and flanges 14 formed on the upper and lower ends of the substrate 16. LED light sources 18 are respectively disposed on the right and left flanges 14 of the reflection case 12 to supply incident light into the light guiding panel 11. Frame members 22, each having a U-shaped cross section, fit in the upper and lower ends of the display body 1, respectively. Each U-shaped frame member is securely fixed with a screw 21 inserted through the rear surface of the frame member, in such a way that the screw 21 is not exposed from the front side of the display body. Frame members 20, each having an L-shaped cross section, are respectively fixed on the right and left ends of the display body 1, with a magnet 23. A transparent cover panel 3 is disposed detachably between the frame member 20 and the optical diffusion case 15. Brackets 4 are fastened on the U-shaped frame members with screws 21 to allow wall mounting.

Claims

1. A display device, comprising,

a display body including a reflection case and a optical diffusion case, fitted to each other, a light guiding panel sandwiched between said reflection panel and said optical diffusion case, and a LED light source disposed on a flange of one of said cases, which confronts a light incident end surface of said light guiding panel;

frame members disposed so as to fit in one or both of opposed ends of said display body; and

a front cover panel disposed detachably, for covering the illumination surface of said optical diffusion case between said frame members.

2. The display device defined in claim 1, wherein one of said reflection case and said optical diffusion case of said display body comprises a box-like case which has flanges respectively formed at both opposed ends of a substrate and wherein the other of said reflection case and said optical diffusion case has a U-shaped cross section and has flanges formed at one of the opposed ends of said substrate.

3. The display device defined in claim 1, wherein one of said reflection case and said optical diffusion case of said display body has upper and lower flanges, each having a U-shaped cross section, wherein the other of said reflection case and said optical diffusion case has right and left flanges;

and wherein LED light sources are respectively disposed on said upper, lower, right, and left flanges.

4. The display device defined in claim 1, wherein one of said reflection case and said optical diffusion case of said display body is fitted in said light guiding panel to form a flat panel, and wherein the other of said reflection case and said optical diffusion case houses said flat panel and said light guiding panel and has flanges on which LED light sources are disposed.

5. The display device defined in claim 1, wherein said frame member is disposed adjacent at least one of opposed ends of said display body and has a U-shaped cross section, and an erection piece on a rear surface of said frame member and said display body are fastened together with screws, which are inserted through the back surface side thereof but are not exposed on the front side.

6. The display device defined in claim 1, wherein said front cover panel is inserted between the back surface of said frame member and an illumination surface of said optical diffusion case and is detachable between said frame members vertically or horizontally.

7. The display device defined in claim 1, wherein a step or groove is formed in a non-light incident end surface of said light guiding panel and stores conductive leads for LED light sources.

8. The display device defined in claim 1, wherein a storage space for storing conductive leads for LED light sources is formed near to a non-light incident end surface of said light guiding panel in said light guiding panel housing case.

9. The display device defined in claim 1, wherein a wall-mounting bracket is disposed to said frame member, integrally or separately.

10. The display device defined in claim 1, wherein said frame member has a U-shaped cross section, a S-shaped wall mounting bracket is disposed on the back surface of said display body, a back erection piece of said frame member, a display device, and a front erection piece of said wall-mounting bracket are fastened together with screws through the back side of the display device, said screws not protruding through the front side of the display device, and a gap for capillary action prevention is defined between a front erection piece of said wall-mounting bracket and an inner surface of said frame member.