US 12,131,510 B2
Object detection system capable of compensating varying light intensity
Wu-Feng Chen, Tainan (TW); Ching-Wen Wang, Tainan (TW); Cheng-Che Tsai, Tainan (TW); and Hsueh-Tsung Lu, Tainan (TW)
Assigned to Himax Technologies Limited, Tainan (TW)
Filed by Himax Technologies Limited, Tainan (TW)
Filed on Sep. 28, 2021, as Appl. No. 17/488,004.
Prior Publication US 2023/0098230 A1, Mar. 30, 2023
Int. Cl. G06V 10/145 (2022.01); G03B 21/20 (2006.01); H04N 23/56 (2023.01)
CPC G06V 10/145 (2022.01) [G03B 21/2033 (2013.01); H04N 23/56 (2023.01)] 16 Claims
OG exemplary drawing
 
1. An object detection system capable of compensating varying light intensity, comprising:
a projector that projects an original transmitted light on a scene containing an object;
an adjustable device configured to shape the original transmitted light of the projector, thereby generating a shaped transmitted light; and
an image capture device configured to capture an image from a reflected light from the scene;
wherein the original transmitted light passing through but not being shaped by the adjustable device is alternated with the shaped transmitted light generated by shaping the original transmitted light of the projector, thereby resulting in an integrated image captured by the image capture device;
wherein the adjustable device controls relative light intensity of the original transmitted light passing therethrough, where light intensity at a center of the shaped transmitted light is lower than light intensity close to an edge of the shaped transmitted light;
wherein light intensity of the shaped transmitted light is controlled by the adjustable device to be complementary to light intensity of the original transmitted light to compensate varying light intensity of the original transmitted light, and the shaped transmitted light and the original transmitted light are projected alternately and integrated to produce a light with homogeneous light intensity.