LIGHT EMITTING UNIT

• US 20100109036A1
• Filed: 10/29/2009
• Published: 05/06/2010
• Est. Priority Date: 10/30/2008
• Status: Active Grant

• Current Assignee: Gio Optoelectronics Corp. (InnoLux Corporation)
• Original Assignee: Gio Optoelectronics Corp. (InnoLux Corporation)
• Inventors: Chen, Tony K.T., CHEN, Kuo-Tso
• Granted Patent: US 8,263,992 B2
• Time in Patent Office: Days
• US Class Current: 257/98
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: H01L 33/60 Reflective elements

Abstract

A light emitting unit includes a substrate, a first reflecting element, a light-emitting diode (LED), and a second reflecting element. At least one part of the substrate is light permeable. The LED is disposed between the substrate and the first reflecting element, and the first and second reflecting elements are disposed on two opposite sides of the substrate, respectively.

Claims

1. A light emitting unit, comprising:

a substrate, wherein at least one part of the substrate is light permeable;

a first reflecting element;

a light-emitting diode (LED) disposed between the substrate and the first reflecting element; and

a second reflecting element, wherein the first reflecting element and the second reflecting element are disposed on two opposite sides of the substrate, respectively.

2. The light emitting unit according to claim 1, wherein the size of the second reflective element is larger than the size of the first reflective element.

3. The light emitting unit according to claim 1, wherein at least one part of light emitted from the LED are reflected by the first reflectively element and the second reflective element, and then passes through the substrate.

4. The light emitting unit according to claim 1, wherein a maximum diameter of the first reflective element is smaller than five times of a maximum side of the LED.

5. The light emitting unit according to claim 1, wherein the first reflective element is a reflective layer, a reflective plate or a reflective cup.

6. The light emitting unit according to claim 1, wherein the second reflective element is a reflective layer, a reflective plate or a reflective cup.

7. The light emitting unit according to claim 1, wherein the material of the substrate comprises glass, sapphire, quartz, a polymer material, or a plastic material.

8. The light emitting unit according to claim 1, wherein the substrate is a circuit substrate.

9. The light emitting unit according to claim 1, wherein the LED is a LED package or a LED die.

10. The light emitting unit according to claim 1, further comprising:

a molding body or an insulation layer at least partially covering the LED and at least partially disposed between the first reflective element and the LED.

11. The light emitting unit according to claim 10, wherein the first reflective element is a reflective layer and is formed on the molding body or the insulation layer.

12. The light emitting unit according to claim 10, further comprising:

a fluorescent conversion material disposed inside the molding body or the insulation layer.

13. The light emitting unit according to claim 1, further comprising:

a fluorescent conversion material disposed between the LED and the substrate.

14. The light emitting unit according to claim 1, further comprising:

a fluorescent conversion material disposed between the substrate and the second reflective element.

15. A light emitting unit, comprising:

a substrate, wherein at least one part of the substrate is light permeable;

a reflecting element; and

a light-emitting diode (LED) disposed between the substrate and the reflecting element;

wherein a maximum diameter of the reflective element is smaller than five times of a maximum side of the LED.

16. The light emitting unit according to claim 15, wherein the reflective element is a reflective layer, a reflective plate or a reflective cup.

17. The light emitting unit according to claim 15, further comprising:

a molding body or an insulation layer at least partially covering the LED and at least partially disposed between the reflective element and the LED.

18. The light emitting unit according to claim 17, wherein the reflective element is a reflective layer and is formed on the molding body or the insulation layer.

19. The light emitting unit according to claim 17, further comprising:

a fluorescent conversion material disposed inside the molding body or the insulation layer.

20. The light emitting unit according to claim 15, wherein the substrate is a circuit substrate.

21. The light emitting unit according to claim 15, wherein the LED is a LED package or a LED die.

22. The light emitting unit according to claim 15, further comprising:

a fluorescent conversion material disposed between the LED and the substrate.

23. The light emitting unit according to claim 15, further comprising:

a fluorescent conversion material disposed between the substrate and the reflective element.