Pixel circuit, display panel and display device

By introducing a first capacitor in the pixel circuit to connect the first driving circuit and the second driving circuit, the driving current flow period is controlled by the capacitive coupling effect, which solves the problem of inaccurate driving current control in the prior art, improves the display effect and stability, especially the display uniformity when displaying at low grayscale.

CN122090761APending Publication Date: 2026-05-26TIANMA ADVANCED DISPLAY TECH INST (XIAMEN) CO LTD
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Patent Information

Application Number
CN202610319895.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-03-29
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In existing pixel circuits, the design of pulse width modulation circuits and pulse amplitude modulation circuits leads to inaccurate control of the drive current, affecting the display effect, especially in low grayscale display, where there are differences in driving characteristics and uneven display.

Method used

The design employs a first driving circuit and a second driving circuit connected by a first capacitor. The coupling effect of the first capacitor is used to control the gate voltage of the transistor in the second driving circuit, which is independent of the output signal of the first driving circuit. This enables precise control of the driving current flow period and protects the transistor threshold compensation information.

Benefits of technology

It improves the performance stability of pixel circuits, enhances low grayscale display effects, reduces the correlation between signals in driving circuits, reduces display unevenness, and improves the uniformity of power supply voltage signals in the display panel.

✦ Generated by Eureka AI based on patent content.
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Abstract

The embodiment of the invention provides a pixel circuit, a display panel and a display device. The pixel circuit comprises a first driving circuit, a second driving circuit and a first capacitor; a first pole plate of the first capacitor is electrically connected with the output end of the first driving circuit, and a second pole plate of the first capacitor is electrically connected with the second driving circuit; the first driving circuit is configured to generate a control current based on a first data signal, and the second driving circuit is configured to generate a driving current based on a second data signal and control a flow period of the driving current based on the control current; the light-emitting element is electrically connected with the second driving circuit to receive the driving current. The problem of improving the performance stability of the pixel circuit can be solved.
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