US 12,216,001 B2
Device and method for detecting a light irradiating angle
Mang Ou-Yang, Hsinchu (TW); Yung-Jhe Yan, Taipei (TW); Guan-Yu Huang, Kaohsiung (TW); Tse Yu Cheng, Taoyuan (TW); Chang-Hsun Liu, New Taipei (TW); Yu-Siou Liu, Changhua County (TW); Ying-Wen Jan, Hsinchu (TW); Chen-Yu Chan, Hsinchu (TW); and Tung-Yun Hsieh, Taipei (TW)
Assigned to National Yang Ming Chiao Tung University, Hsinchu (TW)
Filed by NATIONAL YANG MING CHIAO TUNG UNIVERSITY, Hsinchu (TW)
Filed on Mar. 21, 2022, as Appl. No. 17/699,695.
Claims priority of application No. 110148215 (TW), filed on Dec. 22, 2021.
Prior Publication US 2023/0194338 A1, Jun. 22, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01J 1/44 (2006.01); G01J 1/42 (2006.01)
CPC G01J 1/44 (2013.01) [G01J 1/4257 (2013.01); G01J 2001/4266 (2013.01); G01J 2001/444 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A device for detecting a light irradiating angle, used to detect an incident direction of a light ray, comprising:
a solar sensor comprising:
a sensing unit having a first sensing area, a second sensing area, a third sensing area, and a fourth sensing area, wherein the first sensing area, the second sensing area, the third sensing area, and the fourth sensing area are respectively configured to generate a first sensing signal, a second sensing signal, a third sensing signal, and a fourth sensing signal based on an intensity of the light ray; and
a mask covering the sensing unit and having an X-shaped light transmitting portion, wherein the light ray transmits the X-shaped light transmitting portion to form an X-axis light ray and a Y-axis light ray, the X-axis light ray intersects the Y-axis light ray, and an intersection of the X-axis light ray and the Y-axis light ray falls on one of the first sensing area, the second sensing area, the third sensing area, and the fourth sensing area;
a processor coupled to the sensing unit and configured to receive the first sensing signal, the second sensing signal, the third sensing signal, and the fourth sensing signal and determine information of the incident direction based on the first sensing signal, the second sensing signal, the third sensing signal, and the fourth sensing signal;
wherein each of the first sensing area, the second sensing area, the third sensing area, and the fourth sensing area has a shape of an asymmetrical inequilateral trapezoid;
a calibration sensor, the calibration sensor is arranged adjacent to the solar sensor and coupled to the processor, wherein the calibration sensor is configured to generate and transmit a basing signal to the processor, and the processor is configured to incorporate the basing signal, the first sensing signal, the second sensing signal, the third sensing signal, and the fourth sensing signal into representative calibration equations to lead a first calibration sensing signal, a second calibration sensing signal, a third calibration sensing signal, and a fourth calibration sensing signal, and the representative calibration equations include:
I1-D1×magnification=I1c;
I2-D1×magnification=I2c;
I3-D1×magnification=I3c; and
I4-D1×magnification=I4c;
where I1 represents the first sensing signal, I2 represents the second sensing signal, I3 represents the third sensing signal, I4 represents the fourth sensing signal, D1 represents the basing signal, I1c represents the first calibration sensing signal, I2c represents the second calibration sensing signal, I3c represents the third calibration sensing signal, and I4c represents the fourth calibration sensing signal;
wherein the information of the incident direction includes an X-axis incident angle and a Y-axis incident angle, the processor is configured to incorporate the first calibration sensing signal, the second calibration sensing signal, the third calibration sensing signal, and the fourth calibration sensing signal into a first representative equation to lead the X-axis incident angle, the first representative equation includes

OG Complex Work Unit Math
the processor is configured to incorporate the first calibration sensing signal, the second calibration sensing signal, the third calibration sensing signal, and the fourth calibration sensing signal into a second representative equation to lead the Y-axis incident angle, and the second representative equation includes

OG Complex Work Unit Math
where θx represents the X-axis incident angle, θy, represents the Y-axis incident angle, cU represents a weight of the first sensing area, cY represents a weight of the second sensing area, cD represents a weight of the third sensing area, cR represents a weight of the fourth sensing area, and C represents a constant.