US 12,405,522 B2
Light source device and projector
Sota Hirahara, Tokyo (JP); and Masateru Matsubara, Tokyo (JP)
Assigned to SHARP NEC DISPLAY SOLUTIONS, LTD., Tokyo (JP)
Appl. No. 17/912,016
Filed by Sharp NEC Display Solutions, Ltd., Tokyo (JP)
PCT Filed Mar. 18, 2020, PCT No. PCT/JP2020/011965
§ 371(c)(1), (2) Date Sep. 15, 2022,
PCT Pub. No. WO2021/186612, PCT Pub. Date Sep. 23, 2021.
Prior Publication US 2023/0140762 A1, May 4, 2023
Int. Cl. G03B 21/20 (2006.01)
CPC G03B 21/204 (2013.01) [G03B 21/2053 (2013.01); G03B 21/2073 (2013.01); G03B 21/208 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A light source device comprising:
a first laser source; and
a diffusion element that diffuses light, the diffusion element being provided on an optical path of a first laser beam emitted by the first laser source,
wherein the diffusion element comprises, on an incident surface, a first lens array in which a plurality of first lens elements are arranged that divide the first laser beam into a plurality of light beams and further comprises, on an exit surface, a second lens array in which a plurality of second lens elements are arranged that each face a respective first lens element of the plurality of first lens elements and that each emit a light beam incident from the facing first lens element toward an imaging surface, wherein each second lens element forms a light source image in a different region on the imaging surface.