US 12,123,773 B2
Voltage control system
Masato Takemoto, Osaka Fu (JP); Shota Yamada, Shiga Ken (JP); and Shinzo Koyama, Osaka Fu (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Sep. 5, 2023, as Appl. No. 18/461,314.
Application 18/461,314 is a continuation of application No. PCT/JP2022/014310, filed on Mar. 25, 2022.
Claims priority of application No. 2021-061118 (JP), filed on Mar. 31, 2021.
Prior Publication US 2023/0408331 A1, Dec. 21, 2023
Int. Cl. G01J 1/44 (2006.01); H01L 31/02 (2006.01); H04N 25/772 (2023.01)
CPC G01J 1/44 (2013.01) [H01L 31/02027 (2013.01); H04N 25/772 (2023.01); G01J 2001/4466 (2013.01); G01J 2001/448 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A voltage control system including an array unit in which a plurality of light receiving elements are arranged and connected to a common anode terminal,
the array unit having a light receiving array part receiving incident light and a light shielding array part shielding the light receiving elements from the incident light by a light shielding mechanism, the voltage control system comprising:
a voltage application unit applying a bias voltage to the anode terminal;
a multiplication state determination unit determining the multiplication state of the light shielding array part based on output signals from cathodes of the light receiving elements in the light shielding array part; and
a voltage setting unit performing voltage setting for the bias voltage to be output from the voltage application unit based on the determination results from the multiplication state determination unit,
wherein
the multiplication state determination unit determines that the light shielding array part is in a multiplied state when the number of light receiving elements in the light shielding array part outputting an output signal equal to or greater than a predetermined first threshold is equal to or greater than a predetermined second threshold, and
when the multiplication state determination unit does not determine that the light shielding array part is in the multiplied state, the voltage setting unit sets a set value of the bias voltage to be greater in absolute value than the previous set voltage.