Light-emitting device capable of improving the light-emitting efficiency
First Claim
Patent Images
1. A light-emitting device, comprising:
- a substrate having an upper surface and a lower surface opposite to each other and an annular side surface connecting the upper surface and the lower surface;
a light emitting structure disposed on the upper surface of the substrate; and
a coarse structure formed on the annular side surface of the substrate, wherein a ratio of a thickness of the substrate and a thickness of the coarse structure is greater than or equal to 1 and less than or equal to 20, a distance from a side of the coarse structure relatively near the upper surface of the substrate to the upper surface of the substrate is greater than or equal to 10 μ
m and less than or equal to 150 μ
m, and a distance from a side of the coarse structure relatively near the lower surface of the substrate to the lower surface of the substrate is greater than or equal to 0 μ
m and less than or equal to 100 μ
m.
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Accused Products
Abstract
A light-emitting device including a substrate, a light emitting structure and a coarse structure is provided. The substrate has an upper surface and a lower surface opposite to each other, and an annular side surface connecting the upper surface and the lower surface. The light emitting structure is disposed on the upper surface of the substrate. The coarse structure is formed on the annular side surface of the substrate. A ratio of a thickness of the substrate and a thickness of the coarse structure is greater than or equal to 1 and less than or equal to 20. Therefore, the overall light-emitting efficiency of the light-emitting device may be improved.
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Citations
11 Claims
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1. A light-emitting device, comprising:
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a substrate having an upper surface and a lower surface opposite to each other and an annular side surface connecting the upper surface and the lower surface; a light emitting structure disposed on the upper surface of the substrate; and a coarse structure formed on the annular side surface of the substrate, wherein a ratio of a thickness of the substrate and a thickness of the coarse structure is greater than or equal to 1 and less than or equal to 20, a distance from a side of the coarse structure relatively near the upper surface of the substrate to the upper surface of the substrate is greater than or equal to 10 μ
m and less than or equal to 150 μ
m, and a distance from a side of the coarse structure relatively near the lower surface of the substrate to the lower surface of the substrate is greater than or equal to 0 μ
m and less than or equal to 100 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification