Display panel and display device

By introducing a receiving time statistics module and a dual data signal writing stage into the OLED display panel, the problem of image retention after displaying a fixed pattern for a long time is solved, and the display effect is improved.

CN122454903APending Publication Date: 2026-07-24WUHAN TIANMA MICRO ELECTRONICS CO LTD
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Patent Information

Application Number
CN202610660450.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-13
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

OLED display panels are prone to image retention and permanent burn-in after displaying fixed patterns for a long time, resulting in a decline in display quality.

Method used

A driver chip is introduced into the display panel. The receiving time statistics module counts the time that the pixel circuit continuously receives the same data signal. After detecting the risk of long-term reception, a dual writing process is performed, consisting of a compensation data signal writing stage and an actual data signal writing stage, to correct the threshold drift of the driver transistor.

Benefits of technology

It effectively reduces the phenomenon of long-term defects, improves the accuracy of the gate potential of the driving transistor and the accuracy of the light-emitting driving current, and improves the display effect.

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Abstract

The embodiment of the invention provides a display panel and a display device. The display panel comprises a plurality of pixel circuits and a driving chip, and a data write-in module in each pixel circuit is electrically connected with a driving transistor. The driving chip comprises a receiving time counting module, if the driving chip counts that the duration time is larger than t1, one working period of the pixel circuit comprises a compensation data signal writing stage and an actual data signal writing stage, and in one working period of the pixel circuit with the long residual risk, the actual data signal writing stage is set to be larger than t1. Comprising two data signal write-in stages, so that a pixel circuit firstly enters a compensation data signal write-in stage, a driving transistor receives a compensation data signal different from a compensation data signal received for a long time before, and the grid bias condition of the driving transistor is corrected, so that the threshold drift degree of the driving transistor is reduced; the accuracy of generating the accurate light-emitting driving current by the driving transistor is improved, and the long residual degree of a display picture is reduced.
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