US 11,862,112 B2
System and method for measuring ambient light
David Maucotel, Saint Cassien (FR)
Assigned to STMicroelectronics (Grenoble 2) SAS, Grenoble (FR)
Filed by STMicroelectronics (Grenoble 2) SAS, Grenoble (FR)
Filed on Apr. 16, 2020, as Appl. No. 16/850,327.
Claims priority of application No. 1904558 (FR), filed on Apr. 30, 2019.
Prior Publication US 2020/0348170 A1, Nov. 5, 2020
Int. Cl. G01J 1/42 (2006.01); G01J 1/02 (2006.01); G09G 5/10 (2006.01); G09G 3/34 (2006.01)
CPC G09G 3/3406 (2013.01) [G09G 5/10 (2013.01); G01J 2001/4238 (2013.01); G09G 2320/0626 (2013.01); G09G 2360/144 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a control circuit configured to provide a binary control signal alternating between a first binary state during first phases and a second binary state during second phases;
a screen controlled by the binary control signal, the screen being configured to emit light during each first phase, and not emit light during each second phase;
a light sensor disposed under the screen or along an edge of the screen, the light sensor configured to provide a measurement signal after a plurality of consecutive measurements across a plurality of consecutive second phases, each measurement being a representative of a quantity of light received by the light sensor during each measurement phase; and
a processing unit configured to determine a setpoint signal based on the measurement signal, the setpoint signal received by the control circuit to set a duration of the first binary state and the second binary state.