Lighting device

Patent metadata

Field	Value
Publication number	US-9966366-B2
Application number	US-201615250044-A
Country	US
Kind code	B2
Filing date	Aug 29, 2016
Priority date	Sep 14, 2012
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A lighting device includes a plurality of light-emitting diodes including a first light-emitting diode with a non-rectangular shape in a top view, a submount to which each of the plurality of light-emitting diodes is coupled, and a plurality of conductive elements formed between the submount and the plurality of light-emitting diodes to electrically connecting at least a portion of the plurality of light-emitting diodes with each other in series.

First claim

What is claimed is:

1. A light-emitting device, comprising:
a substrate;
a first mesa structure having a first side facing the substrate, a second side opposite to the first side, p-type electrode and an n-type electrode arranged on the first side;
a passivation layer formed on the first mesa structure and exposing the p-type electrode and the n-type electrode;
a plurality of bonding metals formed on the p-type electrode, the n-type electrode and the passivation layer; and
a second mesa structure adjacent to the first mesa structure on the substrate;
wherein the first mesa structure and the second mesa structure have same shapes with different orientations, or different shapes, in a top view, and
wherein the first mesa structure and the second mesa structure collectively have a pattern different from the shapes of the first mesa structure and the second mesa structure in the top view.

2. The light-emitting device of claim 1 , wherein the first mesa structure and the second mesa structure have triangular shapes.

3. The light-emitting device of claim 1 , wherein the first mesa structure and the second mesa structure collectively have a rectangular or square pattern.

4. The light-emitting device of claim 1 , wherein the first mesa structure and the second mesa structure are configured to not electrically connected in series before bonding to a submount.

5. The light-emitting device of claim 1 , wherein the substrate has an outline similar to the pattern.

6. The light-emitting device of claim 1 , wherein the substrate is a thin-down substrate.

7. The light-emitting device of claim 1 , further comprising a third mesa structure arranged on the substrate, wherein the first mesa structure is nearer the second mesa structure than the third mesa structure.

8. The light-emitting device of claim 1 , wherein the first mesa structure and the second mesa structure have different non-rectangular shapes.

9. A light-emitting device, comprising:
a substrate;
a first mesa structure arranged on the substrate, and having a first p-type electrode, a first n-type electrode and a first shape; and
a second mesa structure electrically separated from the first mesa structure on the substrate, and having a second p-type electrode, a second n-type electrode and a second shape;
wherein the first shape and the second shape collectively form a pattern which is different from the first shape or the second shape, and
wherein the first mesa structure and the second mesa structure are electrically disconnected to each other before bonding to a submount.

10. The light-emitting device of claim 9 , wherein the substrate is a thin-down substrate.

11. The light-emitting device of claim 9 , wherein the substrate is a growth substrate.

12. The light-emitting device of claim 9 , wherein the first mesa structure has a first edge, the second mesa structure has a second edge substantially parallel to the second edge.

13. The light-emitting device of claim 9 , wherein the first mesa structure has a first edge, the second mesa structure has a second edge, the first edge and the second edge have similar lengths.

14. The light-emitting device of claim 9 , wherein the substrate has an outline similar to the pattern.

15. A light-emitting device, comprising:
a substrate;
a first mesa structure arranged on the substrate and having a p-type electrode and an n-type electrode;
a second mesa structure electrically separated from the first mesa structure on the substrate; and
a passivation layer formed on the first mesa structure and the second mesa structure;
wherein the passivation layer and the substrate are arranged on different sides of the first mesa structure, and
wherein the substrate, the first mesa structure, and the second mesa structure have different shapes in a top view.

16. The light-emitting device of claim 15 , wherein the substrate is a thin-down substrate.

17. The light-emitting device of claim 15 , wherein the substrate is a growth substrate.

18. The light-emitting device of claim 15 , wherein the first mesa structure and the second mesa structure collectively have a pattern different to the shapes of the first mesa structure and the second mesa structure.

19. The light-emitting device of claim 15 , further comprising a third mesa structure, wherein the first mesa structure, the second mesa structure, and the third mesa structure collectively have a pattern different from either one shape of the first mesa structure, the second mesa structure, and the third mesa structure.

20. The light-emitting device of claim 15 , wherein the first mesa structure and the second mesa structure are arranged in a pair.

Assignees

• Epistar Corp

Inventors

• Chen Kuan-Chun
• Kuo Hao-Chung
• Lin You-Da
• Li Zhen-Yu

Classifications

• F21S6/00

  Lighting devices intended to be free-standing (F21S9/00, F21S10/00, {F21S13/12} take precedence {lighting devices specially adapted to be transported from place to place, e.g. lighting devices carried on wheeled supports F21L; details of supports for lighting devices F21V21/00}) · CPC title

• F21V7/24

  characterised by the material · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V29/74

  with fins or blades · CPC title

• F21V21/00

  Supporting, suspending, or attaching arrangements for lighting devices (F21V17/00, F21V19/00 take precedence; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q, stands for supporting apparatus or articles in general F16M11/00); Hand grips · CPC title