US 12,449,724 B2
Projection device and light source system thereof
Hung-Ying Lin, Taoyuan (TW)
Assigned to DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed by DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed on Nov. 23, 2022, as Appl. No. 18/058,272.
Claims priority of application No. 202210691761.0 (CN), filed on Jun. 17, 2022.
Prior Publication US 2023/0408896 A1, Dec. 21, 2023
Int. Cl. G03B 21/20 (2006.01)
CPC G03B 21/204 (2013.01) [G03B 21/2013 (2013.01); G03B 21/2053 (2013.01); G03B 21/2066 (2013.01); G03B 21/208 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A light source system, comprising:
a first light source configured to emit a first light beam;
a second light source configured to emit a second light beam, wherein the first light beam has a color or a wavelength range different from those of the second light beam;
a curved surface reflection element having a first focal point, a first curved surface, a second curved surface and a groove, wherein the first curved surface and the second curved surface are opposite to each other, and the groove is configured between the first curved surface and the second curved surface and is adjacent to the first focal point; and
a wavelength conversion element arranged through the groove and having a first surface and a second surface opposite to each other, wherein the first light beam is incident on a first area of the first surface where the first focal point located, and the second light beam is incident on a second area of the second surface where the first focal point located,
wherein the first area comprises at least one light excitation region and a first light reflection region, at least one light excitation region is configured to generate a third light beam through exciting of the first light beam, and the first light reflection region is configured to reflect the first light beam,
wherein the second area comprises a second light reflection region, and the second light reflection region is configured to reflect the second light beam.