IP Library › Granted Patent US 11,015,768
Granted Patent B2
US 11,015,768 · App. 16/375,452 · Granted May 25, 2021

Method of manufacturing light source device

Inventors: Atsushi Yamamoto (Komatsushima, JP); Takeshi Tamura (Tokushima, JP)
Assignee: NICHIA CORPORATION
F21K9/66F21K9/64F21K9/68F21K9/69F21K9/90H01L22/20H01L25/0753H01L33/46H01L33/507F21Y2105/16H01L2933/0025H01L2933/0041
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Quick Facts
Patent No.
US 11,015,768
App. No.
16/375,452
Granted
May 25, 2021
Kind
B2
Abstract

A method of manufacturing a light source device includes: providing a substrate having a plurality of light sources disposed thereon; causing the plurality of light sources to emit light; measuring a first light-intensity distribution of an entire surface that is in parallel to the substrate and located above the plurality of light sources; and based on a measured value of the first light-intensity distribution, forming a light-reflecting pattern above the plurality of light sources to obtain a second light-intensity distribution that is different from the first light-intensity distribution.

Claims (52)

1. A method of manufacturing a light source device, the method comprising:

providing a substrate having a plurality of light sources disposed thereon;

causing the plurality of light sources to emit light;

measuring a first light-intensity distribution of an entire surface that is in parallel to the substrate and located above the plurality of light sources; and

forming a light-reflecting pattern by applying a reflecting material above the plurality of light sources such that a light-reflecting performance of the light-reflecting pattern is adjusted based on a measured value of the first light-intensity distribution to obtain a second light-intensity distribution that is different from the first light-intensity distribution.

2. The method of manufacturing a light source device according to claim 1 , further comprising

arranging a light-diffusing plate above the plurality of light sources,

wherein the measuring of the first light-intensity distribution includes measuring the first light-intensity distribution on the light-diffusing plate.

3. The method of manufacturing a light source device according to claim 2 , wherein

the forming of the light-reflecting pattern includes forming the light-reflecting pattern on one surface of the light-diffusing plate.

4. The method of manufacturing a light source device according to claim 3 , wherein

the forming of the light-reflecting pattern includes forming the light-reflecting pattern using the reflecting material that contains a light-reflecting material made of metal oxide particles.

5. The method of manufacturing a light source device according to claim 3 , wherein

the providing of the substrate includes providing the substrate having the plurality of light sources respectively including one or more light emitting elements and a light-reflecting film disposed on an upper surface of each of the one or more light emitting elements.

6. The method of manufacturing a light source device according to claim 3 , wherein

the providing of the substrate includes providing the substrate further having wall parts surrounding each of the plurality of light sources.

7. The method of manufacturing a light source device according to claim 3 , further comprising

arranging at least one selected from the group consisting of a wavelength-converting sheet, a prism sheet, and a polarizing sheet.

8. The method of manufacturing a light source device according to claim 3 , further comprising

forming a color-converting pattern above the light-reflecting pattern.

9. The method of manufacturing a light source device according to claim 2 , further comprising

arranging a light-transmissive sheet above the plurality of light sources,

wherein the forming of the light-reflecting pattern includes forming the light-reflecting pattern on one surface of the light-transmissive sheet.

10. The method of manufacturing a light source device according to claim 9 , wherein

the forming the light-reflecting pattern includes forming the light-reflecting pattern using the reflecting material that contains a light-reflecting material made of metal oxide particles.

11. The method of manufacturing a light source device according to claim 9 , wherein

the providing of the substrate includes providing the substrate having the plurality of light sources respectively including one or more light emitting elements and a light-reflecting film disposed on an upper surface of each of the one or more light emitting elements.

12. The method of manufacturing a light source device according to claim 9 , wherein

the providing of the substrate includes providing the substrate further having wall parts surrounding each of the plurality of light sources.

13. The method of manufacturing a light source device according to claim 9 , further comprising

arranging at least one selected from the group consisting of a wavelength-converting sheet, a prism sheet, and a polarizing sheet.

14. The method of manufacturing a light source device according to claim 9 , further comprising

forming a color-converting pattern above the light-reflecting pattern.

15. The method of manufacturing a light source device according to claim 1 , further comprising

arranging a light-transmissive sheet above the plurality of light sources,

wherein the forming of the light-reflecting pattern includes forming the light-reflecting pattern on one surface of the light-transmissive sheet.

16. The method of manufacturing a light source device according to claim 1 , wherein

the forming of the light-reflecting pattern includes forming the light-reflecting pattern using the reflecting material that contains a light-reflecting material made of metal oxide particles.

17. The method of manufacturing a light source device according to claim 1 , wherein

the providing of the substrate includes providing the substrate having the plurality of light sources respectively including one or more light emitting elements and a light-reflecting film disposed on an upper surface of each of the one or more light emitting elements.

18. The method of manufacturing a light source device according to claim 1 , wherein

the providing of the substrate includes providing the substrate further having wall parts surrounding each of the plurality of light sources.

19. The method of manufacturing a light source device according to claim 1 , further comprising

arranging at least one selected from the group consisting of a wavelength-converting sheet, a prism sheet, and a polarizing sheet above the plurality of light sources.

20. The method of manufacturing a light source device according to claim 1 , further comprising

forming a color-converting pattern above the light-reflecting pattern.

21. The method of manufacturing a light source device according to claim 1 , wherein

the light-reflecting performance of the light-reflecting pattern is adjusted by adjusting a concentration of a light-reflecting material contained in the reflecting material.

22. The method of manufacturing a light source device according to claim 1 , wherein

the light-reflecting performance of the light-reflecting pattern is adjusted by altering a thickness of the reflecting material applied above the plurality of light sources.

23. The method of manufacturing a light source device according to claim 1 , wherein

the forming of the light-reflecting pattern includes forming the light-reflecting pattern having first regions directly above the plurality of light sources, respectively, and a second region different from the first regions.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 4, 2019
From: YAMAMOTO, ATSUSHI; TAMURA, TAKESHI
To: NICHIA CORPORATION
Reel/Frame 048797/0288 →
Priority Claims (1)
JP JP2018-074008 · Apr 6, 2018 · national
Continuity (1)
Related Publication 20190309913A1 · Oct 10, 2019