US 11,842,680 B2
Semiconductor device and electronic apparatus
Isamu Kawabe, Tenri (JP); Takahiro Inoue, Tenri (JP); Takayuki Shimizu, Tenri (JP); Kohji Hamaguchi, Tenri (JP); and Tetsuro Ikeda, Tenri (JP)
Assigned to Sharp Semiconductor Innovation Corporation, Tenri (JP)
Filed by Sharp Semiconductor Innovation Corporation, Tenri (JP)
Filed on Nov. 16, 2022, as Appl. No. 17/988,744.
Claims priority of application No. 2021-188892 (JP), filed on Nov. 19, 2021.
Prior Publication US 2023/0162671 A1, May 25, 2023
Int. Cl. G09G 3/3225 (2016.01)
CPC G09G 3/3225 (2013.01) [G09G 2360/144 (2013.01); G09G 2360/145 (2013.01); G09G 2360/16 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A semiconductor device comprising:
a light measuring instrument disposed opposite a display surface of a display panel provided with a self-emission element, and disposed for measuring ambient-light illuminance of the display panel;
a storage device configured to store a plurality of first measurements measured by the light measuring instrument in synchronization with a synchronizing signal of the display panel during a plurality of first measurement periods that are shorter than an ON/OFF period of the self-emission element; and
a calculation unit configured to calculate light emission illuminance of the self-emission element in accordance with the plurality of first measurements stored in the storage device, and configured to calculate the ambient-light illuminance by subtracting a value based on the light emission illuminance from a second measurement measured by the light measuring instrument during a second measurement period that is longer than the plurality of first measurement periods.