Light-Emitting Diode Apparatus and Method for Making the Same

• US 20120138981A1
• Filed: 12/02/2010
• Published: 06/07/2012
• Est. Priority Date: 12/02/2010
• Status: Abandoned Application

• Current Assignee: Chung-Shan Institute of Science & Technology Armaments Bureau MND (Government of The Republic of China)
• Original Assignee: Chung-Shan Institute of Science & Technology Armaments Bureau MND (Government of The Republic of China)
• Inventors: Chen, Hsuen-Li, Ku, Shih-Liang, Chen, Tai-Hsiang, Hsu, Chan-Wei
• Application Number:
  US12/958,457
• Publication Number:
  US 20120138981A1
• Time in Patent Office: Days
• US Class Current: 257/98
• CPC Class Codes: H01L 2933/0058 relating to optical field-shaping elements
• CPC Class Codes: H01L 2933/0091 Scattering means in or on the semiconductor body or semiconductor body package H01L33/22 takes precedence
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

A light-emitting diode apparatus includes a light-emitting diode, a first package layer provided over the light-emitting diode, and a second package layer provided over the first package layer. The first package layer is dosed with phosphor. The second package layer is not dosed with any phosphor. The second package layer is formed with a textured light-emitting surface.

Claims

1. A light-emitting diode apparatus including:

a light-emitting diode 10;

a first package layer 11 provided over the light-emitting diode 10, wherein the first package layer 11 is dosed with phosphor 12; and

a second package layer 13 provided over the first package layer 11, wherein the second package layer 13 is not dosed with any phosphor, wherein the second package layer 13 is formed with a textured light-emitting surface 130.

2. The light-emitting diode apparatus according to claim 1, wherein the textured light-emitting surface 130 includes a plurality of protuberances 132 formed thereon.

3. The light-emitting diode apparatus according to claim 2, wherein each of the protuberances 132 is in the form of a cone.

4. The light-emitting diode apparatus according to claim 1, wherein the textured light-emitting surface 130 includes a plurality of cavities 134 defined therein.

5. The light-emitting diode apparatus according to claim 4, wherein each of the cavities 134 is in compliance with a cone.

6. The light-emitting diode apparatus according to claim 1, wherein the first package layer 11 is made with a refraction index identical to that of the second package layer 13.

7. The light-emitting diode apparatus according to claim 1, wherein the first package layer 11 is made with a refraction index closed to that of the second package layer 13.

8. The light-emitting diode apparatus according to claim 1, wherein the light-emitting diode 10 is a blue light-emitting diode while the phosphor 12 is yellow phosphor.

9. The light-emitting diode apparatus according to claim 1, including a base 14 for supporting the light-emitting diode 10.

10. A method for making a light-emitting diode apparatus including the steps of:

providing a light-emitting diode 10;

providing a first package layer 11 over the light-emitting diode 10, wherein the first package layer 11 is dosed with phosphor 12; and

providing a second package layer 13 over the first package layer 11, wherein the second package layer 13 is not dosed with any phosphor, wherein the second package layer 13 is formed with a light-emitting surface 130; and

making a texture on the light-emitting surface 130 of the second package layer 13.

11. The method according to claim 10, wherein the step for making the texture on the light-emitting surface 130 of the second package layer 13 includes the steps of:

providing a mold 15, 16 with a plurality of bosses 150, 160; and

pressing the mold 15, 16 onto the light-emitting surface 130, thus making the texture.

12. The method according to claim 11, including the step of curing the light-emitting surface 130 after the step of pressing the mold 15, 16 onto the light-emitting surface 130.

13. The method according to claim 10, wherein the textured light-emitting surface 130 includes a plurality of protuberances 132 formed thereon.

14. The method according to claim 13, wherein each of the protuberances 132 is in the form of a cone.

15. The method according to claim 10, wherein the textured light-emitting surface 130 includes a plurality of cavities 134 defined therein.

16. The method according to claim 15, wherein the each of the cavities 134 is in compliance with a cone.

17. The method according to claim 10, wherein the first package layer 11 is made with a refraction index identical to that of the second package layer 13.

18. The method according to claim 10, wherein the first package layer 11 is made with a refraction index higher than that of the second package layer 13.

19. The method according to claim 10, wherein the light-emitting diode 10 is a blue light-emitting diode while the phosphor 12 is yellow phosphor.

20. The method according to claim 10, including the step of providing a base 14 for supporting the light-emitting diode 10.