Light emitting diode structure

• US 20070194684A1
• Filed: 02/21/2006
• Published: 08/23/2007
• Est. Priority Date: 02/21/2006
• Status: Abandoned Application

• Current Assignee: Innovative & Superior Technology Inc.
• Original Assignee: Innovative & Superior Technology Inc.
• Inventors: Chen, Yi-Yi, Lin, Chun-Liang, Huang, Ren-Feng
• Application Number:
  US11/357,046
• Publication Number:
  US 20070194684A1
• Time in Patent Office: Days
• US Class Current: 313/463
• CPC Class Codes: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 13/14 the elements being filters or photoluminescent elements, reflectors and refractors
• CPC Class Codes: F21V 5/10 comprising photoluminescent material
• CPC Class Codes: F21V 7/30 the coatings comprising photoluminescent substances
• CPC Class Codes: F21V 9/32 characterised by the arrangement of the photoluminescent material
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light source is positioned so as to face a highly light-pervious side of a unidirectional highly pervious lens, which has a highly reflective side on the other side; the highly reflective side of the unidirectional highly pervious lens is coated with a fluorescent material; therefore, when light emitted from the light source travels to the fluorescent material through the highly light-pervious side and the highly reflective side, the fluorescent material will be excited to produce dispersion of light, and the highly reflective side of the unidirectional highly pervious lens will reflect those light beams of dispersed light from the fluorescent material that head towards the light source.

Claims

1. An improvement on light emitting diode structure, comprising

a unidirectional highly pervious lens, the unidirectional highly pervious lens having a highly reflective side, and a highly light-pervious side;

a light source, the light source being positioned so as to face the highly light-pervious side of the unidirectional highly pervious lens; and

a fluorescent material over the highly reflective side of the unidirectional highly pervious lens;

when light emitted from the light source travels to the fluorescent material through the highly light-pervious side and the highly reflective side, the fluorescent material being going to be excited to produce dispersion of light in all directions, and the highly reflective side of the unidirectional highly pervious lens being going to reflect those light beams of dispersed light from the fluorescent material that head towards the light source.

2. The improvement on light emitting diode structure as recited in claim 1, wherein ratio of light passing through the highly light-pervious side to that passing through the highly reflective side of the unidirectional highly pervious lens is greater than 50%.

3. The improvement on light emitting diode structure as recited in claim 1, wherein the highly reflective side is made by means of coating the unidirectional highly pervious lens with a highly reflective film.

4. The improvement on light emitting diode structure as recited in claim 3, wherein the highly reflective film is made of a compound material of titanium dioxide and silicon oxide.

5. The improvement on light emitting diode structure as recited in claim 4, wherein thickness of the highly reflective film is no greater than 100 nanometers.

6. An improvement on light emitting diode structure, comprising

a unidirectional highly pervious lens, the unidirectional highly pervious lens having a highly reflective side, and a highly light-pervious side;

a light source, the light source being positioned so as to face the highly light-pervious side of the unidirectional highly pervious lens;

a second lens, the lens being positioned in front of the unidirectional highly pervious lens; and

a fluorescent material over one of two sides of said second lens;

whereby when light emitted from the light source travels to the fluorescent material through the unidirectional highly pervious lens and said second lens, the fluorescent material will be excited to produce dispersion of light in all directions, and the highly reflective side of the unidirectional highly pervious lens will reflect those light beams of dispersed light from the fluorescent material that head towards the light source.

7. The improvement on light emitting diode structure as recited in claim 6, wherein ratio of light passing through the highly light-pervious side to that passing through the highly reflective side of the unidirectional highly pervious lens is greater than 50%.

8. The improvement on light emitting diode structure as recited in claim 6, wherein the highly reflective side is made by means of coating the unidirectional highly pervious lens with a highly reflective film.

9. The improvement on light emitting diode structure as recited in claim 8, wherein the highly reflective film is made of a compound material of titanium dioxide and silicon oxide.

10. The improvement on light emitting diode structure as recited in claim 9, wherein thickness of the highly reflective film is no greater than 100 nanometers.

11. An improvement on light emitting diode structure, comprising

a unidirectional highly pervious lens, the unidirectional highly pervious lens having a highly reflective side, and a highly light-pervious side;

a light source, the light source being positioned so as to face the highly light-pervious side of the unidirectional highly pervious lens;

two second lenses, the lenses being positioned in front of the unidirectional highly pervious lens; and

a fluorescent material, the fluorescent material being sandwiched between said two second lenses;

whereby when light emitted from the light source travels to the fluorescent material through the unidirectional highly pervious lens and one of said second lenses, the fluorescent material will be excited to produce dispersion of light in all directions, and the highly reflective side of the unidirectional highly pervious lens will reflect those light beams of dispersed light from the fluorescent material that head towards the light source.

12. The improvement on light emitting diode structure as recited in claim 11, wherein ratio of light passing through the highly light-pervious side to that passing through the highly reflective side of the unidirectional highly pervious lens is greater than 50%.

13. The improvement on light emitting diode structure as recited in claim 11, wherein the highly reflective side is made by means of coating the unidirectional highly pervious lens with a highly reflective film.

14. The improvement on light emitting diode structure as recited in claim 13, wherein the highly reflective film is made of a compound material of titanium dioxide and silicon oxide.

15. The improvement on light emitting diode structure as recited in claim 14, wherein thickness of the highly reflective film is no greater than 100 nanometers.