US 12,481,207 B2
Laser source and laser projection apparatus
Ke Yan, Shandong (CN); Wei Li, Shandong (CN); and Youliang Tian, Shandong (CN)
Assigned to HISENSE LASER DISPLAY CO., LTD, Qingdao (CN)
Filed by HISENSE LASER DISPLAY CO., LTD, Shandong (CN)
Filed on May 17, 2023, as Appl. No. 18/198,715.
Application 18/198,715 is a continuation of application No. PCT/CN2022/077331, filed on Feb. 22, 2022.
Claims priority of application No. 202110199371.7 (CN), filed on Feb. 22, 2021; application No. 202110199377.4 (CN), filed on Feb. 22, 2021; and application No. 202110351962.1 (CN), filed on Mar. 31, 2021.
Prior Publication US 2023/0314921 A1, Oct. 5, 2023
Int. Cl. G03B 21/20 (2006.01)
CPC G03B 21/2033 (2013.01) [G03B 21/2013 (2013.01); G03B 21/2066 (2013.01); G03B 21/208 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A laser source, comprising:
a laser device including a first laser device and a second laser device, the first laser device being configured to emit a first type laser beam and a second type laser beam, and the second laser device being configured to emit at least the second type laser beam;
a combining lens group including a first combining lens group and a second combining lens group, the first combining lens group being configured to combine the laser beams emitted by the first laser device and propagate the combined laser beams in a first direction, the second combining lens group being configured to reflect the second type laser beam emitted by the second laser device in the first direction; on a plane perpendicular to the first direction, an orthogonal projection of a beam spot provided by the first type laser beam on the first combining lens group being smaller than an orthogonal projection of a beam spot provided by the second type laser beam on the first combining lens group; and
a beam spot angle guiding component, the beam spot angle guiding component being configured to change a divergence angle of at least one of the first type laser beam or the second type laser beam, so as to improve coincidence degree and color uniformity of the beam spot of the first type laser beam and the beam spot of the second type laser beam incident on the combining lens group.