US 12,482,421 B2
Display device having driving transistor to drive electro-optical element
Tetsuro Yamamoto, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 15, 2024, as Appl. No. 18/635,598.
Claims priority of application No. 2023-068095 (JP), filed on Apr. 18, 2023; and application No. 2024-016723 (JP), filed on Feb. 6, 2024.
Prior Publication US 2024/0355284 A1, Oct. 24, 2024
Int. Cl. G09G 3/3233 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 2310/08 (2013.01); G09G 2320/0247 (2013.01); G09G 2330/021 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A display device comprising a pixel circuit, the pixel circuit comprising:
a current-driven electro-optical element;
a first power supply from which a current is supplied to the electro-optical element;
a second power supply which is lower in potential than the first power supply;
a signal line via which an image signal is supplied to the electro-optical element;
a writing transistor whose first terminal is coupled to the signal line;
a driving transistor whose first terminal is coupled to a second terminal of the writing transistor, the driving transistor being configured to drive the electro-optical element in accordance with an image signal written by the writing transistor;
a correction transistor coupled between a gate of the driving transistor and a second terminal of the driving transistor;
a second switching transistor coupled between the second terminal of the driving transistor and an anode of the electro-optical element;
an initialization transistor coupled between the anode of the electro-optical element and the second power supply; and
a capacitive element coupled between the gate of the driving transistor and the first power supply, wherein
the correction transistor, the second switching transistor, and the initialization transistor are n-channel transistors, and
a current driving power of the second switching transistor is greater than a current driving power of the correction transistor.