Light-emitting diode
A light-emitting diode includes: a semiconductor epitaxial structure including a first semiconductor layer, a second semiconductor layer disposed over the first semiconductor layer, an active layer between the first and second semiconductor layers; a first electrode electrically coupled to the first semiconductor layer and including a plurality of first sub-electrodes, wherein the plurality of first sub-electrodes are divided into one or more groups, and any two adjacent first sub-electrodes in the same group have a same projection distance; a second electrode disposed over and electrically coupled to the second semiconductor layer; a third electrode coupled to the plurality of first sub-electrodes and including one or more third sub-electrodes, wherein one of the third sub-electrodes corresponds to one of said one or more groups of the first sub-electrodes and connects first sub-electrodes in the group; and a fourth electrode coupled to the second electrode.
1. A light-emitting diode, comprising:
a semiconductor epitaxial structure including a first semiconductor layer, a second semiconductor layer disposed over the first semiconductor layer, an active layer between the first and second semiconductor layers;
a first electrode electrically coupled to the first semiconductor layer and including a plurality of first sub-electrodes, wherein the plurality of first sub-electrodes are divided into one or more groups, and any two adjacent first sub-electrodes in the same group have a same projection distance;
a second electrode disposed over and electrically coupled to the second semiconductor layer;
a third electrode coupled to the plurality of first sub-electrodes and including one or more third sub-electrodes, wherein one of the third sub-electrodes corresponds to one of said one or more groups of the first sub-electrodes and connects first sub-electrodes in the group; and
a fourth electrode coupled to the second electrode.
2. The light-emitting diode of claim 1 , wherein the plurality of first sub-electrodes are divided into a plurality of groups, and each group of the first sub-electrodes has a same arrangement pattern.
3. The light-emitting diode of claim 1 , wherein the plurality of first sub-electrodes are divided into a plurality of groups, and any two adjacent groups have a same distance therebetween.
4. The light-emitting diode of claim 1 , wherein the second electrode includes a plurality of second sub-electrodes, and any two adjacent first sub-electrodes and/or second sub-electrodes have a same projection distance.
5. The light-emitting diode of claim 4 , wherein:
the first electrode and/or second electrode include(s) six sub-electrodes forming a minimal unit of closely-packed hexagonal structure; and
the six sub-electrodes are composed of one or more of the first sub-electrodes, the second sub-electrodes, or a combination of the first sub-electrodes and the second sub-electrodes.
6. The light-emitting diode of claim 5 , wherein the first sub-electrodes and second sub-electrodes are arranged in a staggered manner.
7. The light-emitting diode of claim 6 , wherein:
three first sub-electrodes constitute one minimal unit of equilateral triangle; and
three second sub-electrodes constitute one minimal unit of equilateral triangle.
8. The light-emitting diode of claim 4 , wherein a number of the first sub-electrodes is smaller than or equal to a number of second sub-electrodes.
9. The light-emitting diode of claim 4 , wherein a ratio of the first sub-electrodes to the second sub-electrodes ranges from 0.3-0.9.
10. The light-emitting diode of claim 4 , wherein:
a distance between two adjacent first sub-electrodes is 10-150 μm; and
a distance between two adjacent second sub-electrodes is 10-150 μm.
11. A light-emitting system, comprising a plurality of the light-emitting diodes of claim 1 , wherein the second electrode each comprises a plurality of second sub-electrodes, and the fourth electrode is coupled to the plurality of second sub-electrodes and includes a plurality of fourth sub-electrodes.
12. The light-emitting system of claim 11 , wherein a ratio between the third sub-electrodes to the fourth sub-electrodes is greater than or equal to 2:1.
13. The light-emitting system of claim 11 , wherein the third sub-electrodes have straight or curved strip pattern.
14. The light-emitting system of claim 13 , wherein the curved strip pattern includes an S-shaped pattern or a Z-shaped pattern.
15. The light-emitting system of claim 11 , wherein the third sub-electrodes have same or different shapes.
16. The light-emitting system of claim 11 , wherein adjacent third sub-electrodes have one or more second sub-electrodes placed therebetween.
17. The light-emitting system of claim 16 , wherein the one or more second sub-electrodes placed between have the same or similar patterns with neighboring third sub-electrodes.
18. The light-emitting system of claim 11 , wherein the fourth sub-electrodes have a hollow pattern.
19. The light-emitting system of claim 11 , further comprising a fifth electrode and a sixth electrode, wherein the fifth electrode is coupled to the plurality of third sub-electrodes, and the sixth electrode is coupled to the plurality of fourth sub-electrodes.
20. The light-emitting system of claim 19 , wherein the fifth electrode and sixth electrode have the same shape and are arranged symmetrically.