A pixel circuit, a display panel and a display device

By designing separate threshold compensation and data writing modules in the pixel circuit, the problem of insufficient threshold voltage compensation under high-frequency driving is solved, and the display uniformity and high-frequency driving effect of the high-frequency display panel are realized.

CN122369375APending Publication Date: 2026-07-10WUHAN TIANMA MICRO ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN TIANMA MICRO ELECTRONICS CO LTD
Filing Date
2026-05-27
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing pixel circuits, when performing threshold voltage compensation and data voltage writing, high-frequency driving causes line time compression, which cannot effectively compensate for the threshold voltage of the driving transistor in the driving circuit, thus affecting the high-frequency display effect.

Method used

Design a pixel circuit that includes a light-emitting element, a driving transistor, a first compensation module, a second compensation module, and a data writing module. By separating the enable stages for threshold compensation and data writing, the threshold compensation time is prevented from being affected by the data writing time, thus ensuring the threshold compensation effect.

Benefits of technology

It improves the display uniformity of the display panel, ensures that the threshold compensation time is not limited by the data write time, and enhances the display effect of high-frequency drive.

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Abstract

This invention discloses a pixel circuit, a display panel, and a display device. The pixel circuit includes a light-emitting element, a driving transistor, a first compensation module, a second compensation module, and a data writing module. The first compensation module transmits a signal from a second node to a first node when a first scan signal is enabled. The second compensation module transmits a first initialization signal to a third node when a second scan signal is enabled. The data writing module writes a data signal to the second node when a third scan signal is enabled. The driving transistor generates a driving current based on the signal from the first node, causing the light-emitting element to emit light according to the driving current. By adjusting the enabling stages of the first compensation module, the second compensation module, and the data writing module, threshold compensation and data writing are performed separately. The compensation time is not affected by the data writing time, ensuring the threshold compensation effect and improving display uniformity.
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