US 12,354,549 B2
Pixel driving circuit, method for driving the same, and display panel
Xuanyun Wang, Hubei (CN); and Chao Dai, Hubei (CN)
Assigned to WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Wuhan (CN)
Filed by WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Hubei (CN)
Filed on May 6, 2024, as Appl. No. 18/656,414.
Application 18/656,414 is a continuation of application No. 17/434,768, granted, now 12,002,423, previously published as PCT/CN2021/088270, filed on Apr. 20, 2021.
Claims priority of application No. 202110387008.8 (CN), filed on Apr. 12, 2021.
Prior Publication US 2024/0290268 A1, Aug. 29, 2024
Int. Cl. G09G 3/3233 (2016.01); G09G 3/32 (2016.01); G09G 3/3266 (2016.01); G09G 3/3291 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 3/32 (2013.01); G09G 3/3266 (2013.01); G09G 3/3291 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/0216 (2013.01); G09G 2310/0278 (2013.01); G09G 2320/0247 (2013.01); G09G 2330/021 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A pixel driving circuit, comprising:
a light-emitting element;
a driving transistor connected between a first voltage end and the light-emitting element, wherein the driving transistor is used for driving the light-emitting element to emit light;
a switching transistor connected between a gate of the driving transistor and an initialization voltage node, and connected to a source or a drain of the driving transistor;
a light controlling transistor connected in series with the driving transistor;
a data transistor connected between the driving transistor and a data voltage node; and
an initialization transistor connected between the switching transistor and the initialization voltage node, wherein the initialization transistor is configured to, in response to a first scan signal, transmit an initialization signal to the source or the drain of the driving transistor, and transmit the initialization signal to the gate of the driving transistor through the switching transistor;
wherein upon both the switching transistor and the initialization transistor being turned on, or upon both the switching transistor and the data transistor being turned on, the initialization signal applied on the initialization voltage node is a constant signal.