US 12,136,395 B2
Electro-optical apparatus and electronic device including a transistor for applying a voltage to an anode of a light emitting element
Naobumi Toyomura, Kanagawa (JP)
Assigned to Sony Semiconductor Solutions Corporation, Kanagawa (JP)
Appl. No. 17/420,792
Filed by Sony Semiconductor Solutions Corporation, Kanagawa (JP)
PCT Filed Oct. 17, 2019, PCT No. PCT/JP2019/040812
§ 371(c)(1), (2) Date Jul. 6, 2021,
PCT Pub. No. WO2020/148958, PCT Pub. Date Jul. 23, 2020.
Claims priority of application No. 2019-005409 (JP), filed on Jan. 16, 2019.
Prior Publication US 2022/0114965 A1, Apr. 14, 2022
Int. Cl. G09G 3/3258 (2016.01)
CPC G09G 3/3258 (2013.01) [G09G 2310/0294 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electro-optical apparatus including an active-matrix drive circuit that applies a voltage based on an image signal tone to a light-emitting element, the apparatus comprising:
a first transistor for driving, a source of the first transistor being electrically connected to an anode of the light-emitting element, a drain of the first transistor being electrically connected to a first power supply line, the first power supply providing a first voltage;
a second transistor for setting an anode voltage, the second transistor being electrically connected between the anode and a second power supply line that provides a second voltage, to apply an anode voltage to the anode, the second voltage being different from the first voltage;
a third transistor electrically connected to the anode; and
a first holding capacitor and a second holding capacitor electrically connected in series between the second power supply line and the third transistor, wherein
a gate of the first transistor for driving is electrically connected to a node between the first holding capacitor and the second holding capacitor,
the second holding capacitor and the third transistor are arranged to hold the anode voltage during a light-emission period, and
the second holding capacitor and the third transistor are electrically connected to the source of the first transistor for driving.