Light emitting diode lamp

• US 4,929,866 A
• Filed: 11/07/1988
• Issued: 05/29/1990
• Est. Priority Date: 11/17/1987
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Cable Industries Limited (Mitsubishi Materials Corporation)
• Original Assignee: Mitsubishi Cable Industries Limited (Mitsubishi Materials Corporation)
• Inventors: Murata, Hiroaki, Tabira, Masatoshi, Inomata, Teruhisa
• Primary Examiner(s): Wieder, Kenneth
• Application Number:
  US07/267,852
• Time in Patent Office: 568 Days
• Field of Search: 313/113, 313/498, 313/499, 313/500, 313/512, 313/116, 362/296, 362/297, 362/310, 362/341, 362/362, 362/367
• US Class Current: 313/500
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21S 43/30 characterised by reflectors
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G02B 6/0048 with stepwise taper
• 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: G09F 13/0422 Reflectors
• CPC Class Codes: G09F 13/14 Arrangements of reflectors therein
• CPC Class Codes: G09F 2013/145 curved reflectors
• CPC Class Codes: G09F 2013/1822 Stair-cased profiled window
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

It is disclosed a light emitting diode lamp composing a window through which light is released forwardly, a plurality of light emitting diodes located at a corner of the window or behind the frame of the window, and a light reflector having a plurality of light reflecting faces whereby light emitted from the light emitting diodes is reflected toward the window. The lamp is suited as an automobile lamp, especially as a tail lamp.

Claims

1. A light emitting diode lamp comprising:

a case;

a plurality of light emitting diodes disposed within said case;

a window forming a part of said case and having at least one window frame, said window allowing light emitted from said plurality of light emitting diodes to pass therethrough, said plurality of light emitting diodes being secured at a corner of said window and behind said window frame;

light reflector means having a plurality of light reflecting faces for dividing and reflecting said light from said plurality of light emitting diodes, and

light-scattering means for scattering said light from said light reflector means to thereby have said light substantially uniformly pass through said window.

2. A light emitting diode lamp as defined in claim 1, wherein said case has said light reflector on an inner surface opposite said window.

3. A light emitting diode lamp as defined in claim 1, wherein said light reflector has a plurality of stepped light reflecting faces.

4. A light emitting diode lamp as defined in claim 1, wherein said light reflector has a plurality of light reflecting faces which are saw-like structures in cross-section.

5. A light emitting diode lamp as defined in claim 2, wherein the light emitting diodes are separately located behind said upper and lower frames of said window.

6. A light emitting diode lamp as defined in claim 2, wherein said light reflector comprises a transparent material, and has a plurality of reflecting faces on a first end surface and a second end surface positioned in said window.

7. A light emitting diode lamp as defined in claim 2, wherein said lamp is for use as a tail lamp of an automobile.