US 11,054,730 B2
Light source module and projection device
Jui Chang, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Dec. 17, 2019, as Appl. No. 16/716,507.
Claims priority of application No. 201822120829.1 (CN), filed on Dec. 18, 2018.
Prior Publication US 2020/0192208 A1, Jun. 18, 2020
Int. Cl. G03B 21/20 (2006.01)
CPC G03B 21/2033 (2013.01) [G03B 21/2013 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A light source module applied to a projection device, wherein the projection device comprises an optical system, and the light source module comprises a plurality of laser emitting elements and a light adjusting device, wherein
each of the plurality of laser emitting elements is configured to emit excitation beam; and
each of the plurality of excitation beams is received by the optical system to emit a sub-beam, and each of the sub-beams is provided with a sub-beam light intensity distribution; and
the light adjusting device is disposed between the optical system and the plurality of laser emitting elements, the light adjusting device comprises a plurality of light adjusting elements, the plurality of excitation beams emitted by the plurality of laser emitting elements penetrate through the light adjusting device and is outputted as an output beam, the output beam is converted into an illumination beam by the optical system, and the illumination beam is provided with illumination beam light intensity distributions, wherein
the plurality of light adjusting elements are disposed corresponding to at least a portion of the plurality of laser emitting elements with reference to the plurality of sub-beam light intensity distributions, so that the illumination beam light intensity distribution conforms to a preset light intensity distribution, and
the plurality of light adjusting elements comprise diffusion sheets with different light diffusion capabilities or light filters with different light filtering capabilities, wherein the plurality of light adjusting elements have a one-to-one correspondence with the plurality of laser emitting elements such that each one of the plurality of light adjustment elements corresponds to the corresponding one of the plurality of laser emitting elements, and the each one of the plurality of light adjustment elements is located on a transmission path of the corresponding excitation beam emitted by the corresponding one of the plurality of laser emitting elements.