US 12,456,208 B2
3D sensing system and method
Min-Chian Wu, Tainan (TW); Pen-Hsin Chen, Tainan (TW); Ching-Wen Wang, Tainan (TW); Cheng-Che Tsai, Tainan (TW); and Ting-Sheng Hsu, Tainan (TW)
Assigned to HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed by HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed on Jul. 31, 2022, as Appl. No. 17/816,424.
Prior Publication US 2024/0037767 A1, Feb. 1, 2024
Int. Cl. G06T 7/521 (2017.01); G01B 11/25 (2006.01); G02F 1/29 (2006.01)
CPC G06T 7/521 (2017.01) [G01B 11/254 (2013.01); G02F 1/29 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A 3D (3 dimensions) sensing system, comprising:
a liquid crystal lens;
a projector configured to provide a light beam to the liquid crystal lens which applies a first pattern to the light beam to generate a first structured light;
an image sensor configured to capture a first image corresponding to the first structured light; and
a circuit electrically connected to the image sensor, the liquid crystal lens, and the projector, wherein the circuit is configured to calculate first depth information according to the first pattern and the first image, and determine if the first image satisfies a quality requirement,
wherein if the first image does not satisfy the quality requirement, the circuit is configured to control the liquid crystal lens such that the liquid crystal lens applies a second pattern to the light beam to generate a second structured light, and the image sensor is configured to capture a second image corresponding to the second structured light, wherein the second pattern is different from the first pattern,
wherein the circuit is configured to calculate second depth information according to the second pattern and the second image, and combine the first depth information and the second depth information to generate a depth map;
wherein the second pattern is different from the first pattern to enable the second structured light to illuminate regions which are not illuminated by the first structured light.