US 12,022,240 B2
Laser projection display method and laser projection apparatus
Jichen Xiao, Shandong (CN); and Yishi Zhao, Shandong (CN)
Assigned to HISENSE LASER DISPLAY CO., LTD., Shandong (CN)
Filed by HISENSE LASER DISPLAY CO., LTD., Shandong (CN)
Filed on May 27, 2021, as Appl. No. 17/332,692.
Application 17/332,692 is a continuation in part of application No. PCT/CN2019/120135, filed on Nov. 22, 2019.
Claims priority of application No. 201811444372.8 (CN), filed on Nov. 29, 2018.
Prior Publication US 2021/0289177 A1, Sep. 16, 2021
Int. Cl. H04N 9/31 (2006.01); G03B 21/00 (2006.01); G03B 21/20 (2006.01)
CPC H04N 9/312 (2013.01) [G03B 21/008 (2013.01); G03B 21/2033 (2013.01); H04N 9/3114 (2013.01); H04N 9/3161 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A laser projection display method, performed at a digital light processing (DLP) control processing portion, comprising:
in an output period for a laser source to output a primary color beam, controlling the laser source to be turned off according to a set rotation switching period, the rotation switching period indicating a moment when the laser source is turned off and a moment when the laser source is turned on;
in the rotation switching period, driving micro-mirrors in a digital micro-mirror device to perform rotation switching between an ON state and an OFF state until the moment when the laser source is turned on indicated by the rotation switching period is reached; and
when the moment when the laser source is turned on is reached, controlling the laser source to be turned on, and driving the micro-mirrors to rotate to project and display an image to be displayed until a next rotation switching period is reached,
wherein before the laser source is controlled to be turned off according to the set rotation switching period in the output period for the laser source to output the primary color beam, the method further comprises:
obtaining timings for the laser source to output illumination beams, the timings indicating output periods for the laser source to output respective primary color beams; and
configuring the rotation switching period according to the output periods for the laser source to output the respective primary color beams, the rotation switching period being less than the output period of the primary color beam.