US 11,856,339 B2
Automatic focusing projection method and system
Wenxiang Li, Shenzhen (CN); Mingnei Ding, Shenzhen (CN); Steve Yeung, Hong Kong (CN); and Zhiqiang Gao, Hong Kong (CN)
Assigned to IVIEW DISPLAYS (SHENZHEN) COMPANY LTD., Shenzhen (CN)
Filed by IVIEW DISPLAYS (SHENZHEN) COMPANY LTD., Shenzhen (CN)
Filed on Dec. 7, 2021, as Appl. No. 17/544,121.
Application 17/544,121 is a continuation of application No. PCT/CN2021/082411, filed on Mar. 23, 2021.
Claims priority of application No. 202011623664.5 (CN), filed on Dec. 31, 2020.
Prior Publication US 2022/0210381 A1, Jun. 30, 2022
Int. Cl. H04N 9/31 (2006.01); G06T 7/521 (2017.01); G02B 7/08 (2021.01); G01B 11/25 (2006.01); G01S 17/894 (2020.01)
CPC H04N 9/317 (2013.01) [G02B 7/08 (2013.01); G06T 7/521 (2017.01); G01B 11/25 (2013.01); G01S 17/894 (2020.01); G06T 2207/10028 (2013.01); G06T 2207/20068 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An automatic focusing projection method, the method being applicable to an automatic focusing projection system, the automatic focusing projection system comprising a ranging unit, a projection unit, and a reflection unit, wherein the ranging unit is configured to acquire a depth image, the projection unit is configured to project an image, and the reflection unit is configured to change a direction of outgoing light of the projection unit; and the automatic focusing projection method comprises:
acquiring a depth image from the ranging unit, and acquiring a vertical projection distance from the ranging unit to a projection plane based on the depth image;
acquiring position information of a center point of a projection picture in the depth image based on an elevation angle of the reflection unit and the vertical projection distance;
acquiring a projection distance between the projection unit and the projection picture based on the position information; and
performing focus adjustment on the projection unit based on the projection distance.