LED DISPLAY AND METHOD FOR MANUFACTURING THE SAME

• US 20150279822A1
• Filed: 03/27/2015
• Published: 10/01/2015
• Est. Priority Date: 04/01/2014
• Status: Active Grant

• Current Assignee: Epistar Corporation (Ennostar, Inc.)
• Original Assignee: Epistar Corporation (Ennostar, Inc.)
• Inventors: HSU, Chia-Liang
• Granted Patent: US 9,768,150 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48095 Kinked
• CPC Class Codes: H01L 2224/49107 on the semiconductor or solid-state body
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/50 Multistep manufacturing processes of assemblies consisting of devices, each device being of a type provided for in group H01L27/00 or H01L29/00 H01L21/50 takes precedence
• 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 33/483 Containers
• CPC Class Codes: H01L 33/50 Wavelength conversion 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

An LED display comprises a first end providing a current, a second end receiving the current, a first LED chip, electrically connected between the first end and the second end, emitting a first light, and a second LED chip, emitting a second light, electrically connected to the first end and is insulated from the second end. The current flows from the first end and through the first LED chip to the second end.

Claims

1. An LED display, comprising:

a first end providing a current;

a second end receiving the current;

a first LED chip, electrically connected between the first end and the second end, emitting a first light; and

a second LED chip, emitting a second light, electrically connected to the first end and is insulated from the second end;

wherein the current flows from the first end and through the first LED chip to the second end.

2. The LED display of claim 1, wherein a peak wavelength of the first light is different from that of the second light.

3. The LED display of claim 1, further comprise a bended cover for delivering the first light and the second light therethrough.

4. The LED display of claim 1, wherein the first light and the second light are of different colors.

5. The LED display of claim 1, further comprising a third LED chip, electrically connected between the first end and the second end, and emitting a third light having a peak wavelength different from that of the first light.

6. The LED display of claim 5, wherein the second LED chip locates between the first LED chip and the third LED chip.

7. The LED display of claim 5, further comprising a fourth LED chip, electrically connected to the first end and the third LED chip, and is configured to emit a fourth light having a peak wavelength different from that of the third light, the second light and the first light.

8. The LED display of claim 1, further comprising a switch connected between the first end and the first LED chip.

9. The LED display of claim 8, wherein the switch has one end connected to the first end and a second end connected both the first LED chip and the second LED chip.

10. The LED display of claim 1, further comprising a first phosphor layer covering the first LED chip and a second phosphor layer covering the second LED chip.

11. The LED display of claim 10, further comprising

a third LED chip connected to the first end and the second end;

and

a third phosphor layer covering the third LED chip.

12. The LED display of claim 11, wherein the third phosphor layer comprises a material absent from the first phosphor layer and the second phosphor layer.

13. The LED display of claim 11, wherein an area of the third phosphor layer is different from that of the first phosphor layer or the second phosphor layer.

14. The LED display of claim 11, wherein the first phosphor layer comprises a first phosphor which is also found in the second phosphor layer, and the second phosphor layer comprises a second phosphor absent from the first phosphor layer.

15. A method of manufacturing an LED display, comprising:

providing a submount having a surface;

providing a first lead and a second lead;

providing a first LED chip and a second LED chip;

forming a first electrical connection structure between the first LED chip and the first lead and a second electrical connection structure between the first LED chip and the second lead;

forming a third electrical connection structure between the second LED chip and the first lead;

cutting off the second electrical connection structure; and

forming a fourth electrical connection structure between the second LED chip and the second lead.

16. The method of claim 15, further comprise forming a bended cover to deliver light emitted from the first LED chip and the second LED chip.

17. The method of claim 15, further comprising forming a switch connected between the first lead and the first LED chip.

18. The method of claim 17, wherein the switch has one end connected to the first lead and a second end connected both the first LED chip and the second LED chip.

19. The method of claim 15, further comprising forming a first phosphor layer covering the first LED chip and forming a second phosphor layer covering the second LED chip.

20. The method of claim 19, further comprising

forming a third LED chip connected to the first lead;

and

forming a third phosphor layer covering the third, wherein the third phosphor layer comprises a phosphor absent from the first phosphor layer and the second phosphor layer.