US 12,243,968 B2
Wavelength conversion device
I-Hua Chen, Hsin-Chu (TW); and Chi-Tang Hsieh, Hsin-Chu (TW)
Assigned to CORETRONIC CORPORATION, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Oct. 19, 2021, as Appl. No. 17/504,870.
Claims priority of application No. 202011164093.3 (CN), filed on Oct. 27, 2020.
Prior Publication US 2022/0131053 A1, Apr. 28, 2022
Int. Cl. G02B 26/00 (2006.01); H01L 33/50 (2010.01); G02B 7/00 (2021.01); G02B 26/02 (2006.01)
CPC H01L 33/505 (2013.01) [G02B 26/008 (2013.01); H01L 33/502 (2013.01); H01L 33/507 (2013.01); G02B 7/006 (2013.01); G02B 26/023 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A wavelength conversion device, comprising:
a base plate having a geometric center;
at least one wavelength conversion material layer disposed on the base plate;
a balance ring disposed on the base plate and having a balancing part, wherein the balance ring includes an outer periphery and inner areas enclosed by the outer periphery, and the outer periphery is higher than the inner areas relative to the base plate to form an inner wall;
a rotation shaft coinciding with the geometric center of the base plate, and the at least one wavelength conversion material layer, the balance ring and the base plate being configured to rotate about the rotation shaft; and
at least one balancing mass disposed on the inner areas of the balance ring and abutting against the inner wall of the outer periphery of the balance ring,
wherein the balancing part comprises a recess formed by a part of the outer periphery of the balance ring caving in a radial direction towards the rotation shaft, and the recess is configured to expose a part of the base plate.