LED, Backlight Module, and LCD Device

• US 20130256704A1
• Filed: 03/31/2012
• Published: 10/03/2013
• Est. Priority Date: 03/29/2012
• Status: Abandoned Application

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Hsiao, Yuchun, Tang, Guofu
• Application Number:
  US13/503,849
• Publication Number:
  US 20130256704A1
• Time in Patent Office: Days
• US Class Current: 257/88
• CPC Class Codes: H01L 2224/32245 the item being metallic
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/60 Reflective elements
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

The invention provides a LED, a backlight module, and a LCD device. The LED includes an inner cavity. The bottom of the inner cavity is provided with a chip. Four side walls are arranged around the bottom of the inner cavity. Both ends of the chip are respectively connected with electrodes. Two opposite side walls of the bottom of the inner cavity are provided with at least one convex step surface, and the electrodes at the two ends of the chip are extended to the step surface from the bottom of the inner cavity; the other two side walls adjacent to the step surface are provided with at least one inclined surface which makes an obtuse angle with the bottom of the inner cavity. By selecting the inclination angle of different inclined surfaces, the invention can freely control the scattering range of the emitted light, has strong adaptability, and is suitable for being used as a backlight source of the LCD device. When light enters from the side, the large light emitting angle enables the light to be uniformly emitted into a light guide panel, thereby reducing the phenomenon of hot spots.

Claims

1. A LED, comprising:

an inner cavity;

wherein the bottom of said inner cavity is provided with a chip, four side walls are arranged around the bottom of said inner cavity, both ends of said chip are respectively connected with electrodes, the bottom of the inner cavity are provided with at least one convex step surface at two opposite side walls, and the electrodes at the two ends of said chip are extended to said step surface from the bottom of said inner cavity;

the other two side walls adjacent to the step surface are provided with at least one inclined surface which forms an obtuse angle with the bottom of said inner cavity.

2. The LED of claim 1, wherein one of said two side walls adjacent to said step surface is provided the inclined surface;

said inclined surface intersects the bottom of said inner cavity.

3. The LED of claim 1, wherein both said two side walls adjacent to said step surface are respectively provided with inclined surfaces;

said inclined surfaces intersect the bottom of said inner cavity.

4. The LED of claim 3, wherein the included angles between the inclined surfaces of said two side walls adjacent to said step surface and the bottom are inconsistent.

5. The LED of claim 3, wherein the included angles between the inclined surfaces of said two side walls adjacent to said step surface and the bottom are consistent.

6. The LED of claim 1, wherein the electrode at one end of said chip is connected with a Zener which is arranged on said step surface;

the electrode at the other end of said chip is directly extended outside the inner cavity from the bottom of said inner cavity, and the side wall corresponding thereto is also provided with an inclined surface which intersects the bottom of said inner cavity.

7. The LED of claim 1, wherein the acute angle that said inclined surface intersects the bottom plane of said inner cavity is between 0.5°

and 89°

.

8. The LED of claim 7, wherein the acute angle that said inclined surface intersects the bottom plane of said inner cavity is between 30°

and 60°

.

9. A backlight module, comprising:

an LED;

wherein said LED comprises an inner cavity;

the bottom of said inner cavity is provided with a chip, four side walls are arranged around the bottom of said inner cavity, both ends of said chip are respectively connected with an electrode, the bottom of the inner cavity are provided with at least one convex step surface at two opposite side walls, and the electrodes at the two ends of said chip are extended to said step surface from the bottom of said inner cavity;

the other two side walls adjacent to said step surface are provided with at least one inclined surface which forms an obtuse angle with the bottom of said inner cavity.

10. The backlight module of claim 9, wherein one of said two side walls adjacent to said step surface is provided the inclined surface, and said inclined surface intersects the bottom of said inner cavity.

11. The backlight module of claim 9, wherein both said two side walls adjacent to said step surface are respectively provided inclined surfaces, and said inclined surfaces intersect the bottom of said inner cavity.

12. The backlight module of claim 11, wherein the included angles between the inclined surfaces of said two side walls adjacent to said step surface and the bottom are inconsistent.

13. The backlight module of claim 11, wherein the included angles between the inclined surfaces of said two side walls adjacent to said step surface and the bottom are consistent.

14. The backlight module of claim 9, wherein the electrode at one end of said chip is connected with a Zener, and the Zener is arranged on said step surface;

the electrode at the other end of said chip is directly extended outside the inner cavity from the bottom of said inner cavity, and the side wall corresponding thereto is also provided with an inclined surface which intersects the bottom of said inner cavity.

15. The backlight module of claim 9, wherein the acute angle that said inclined surface intersects the bottom plane of said inner cavity is between 0.5°

and 89°

.

16. The backlight module of claim 15, wherein the acute angle that said inclined surface intersects the bottom plane of said inner cavity is between 30°

and 60°

.

17. A LCD, comprising:

a backlight module of claim 9.