Cholesteric liquid crystal display circuit, driving method thereof and electronic paper

By adjusting the voltage timing of the cholesteric liquid crystal display circuit and reversing the relationship between the gate-source voltage and the source voltage of the transistor, the impact of transistor leakage on bistable holding performance was resolved, resulting in longer image holding time and higher display reliability.

CN122245254BActive Publication Date: 2026-09-11ANHUI YUTU TECH CO LTD
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Patent Information

Application Number
CN202610677919.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-05-15
Publication Date
2026-09-11
Estimated Expiration
2046-05-15

AI Technical Summary

Technical Problem

In existing cholesteric liquid crystal display panels, transistor leakage current under specific polarities leads to a decrease in bistable state retention performance, resulting in problems such as fading of display content, decreased reflectivity, and erroneous state switching.

Method used

By setting the voltage timing of the gate drive circuit, source drive circuit, and common terminal, the relationship between the gate-source voltage and the source voltage of the switching transistor is controlled, the positive and negative frame modes are reversed, liquid crystal polarization is prevented, leakage is avoided, and the image retention time is extended.

Benefits of technology

It effectively suppresses bistable failure and reflectivity reduction caused by leakage current during long-term static holding of cholesteric liquid crystal display panels, thereby improving the reliability and holding time of the display.

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Abstract

The application discloses a cholesteric liquid crystal display circuit, a driving method thereof and electronic paper, and relates to the technical field of cholesteric liquid crystal display. The voltage time sequence of the gate drive circuit, the source drive circuit and the common electrode end is set. In different time periods, when the corresponding pixel is in a liquid crystal torsion state, the gate-source voltage of the switching transistor is the same; when the corresponding pixel is in a liquid crystal non-torsion state, the gate-source voltage of the switching transistor is the same. In different time periods, when the corresponding pixel is in a liquid crystal torsion state, the source electrode voltage of the switching transistor is greater than the common electrode end; when the corresponding pixel is in a liquid crystal non-torsion state, the source electrode voltage of the switching transistor is less than the common electrode end. Not only the size relationship between the source electrode voltage of the switching transistor and the voltage of the common electrode end is switched to prevent liquid crystal polarization, but also the bistable failure, the reflectivity reduction or the state mis-switching of the cholesteric liquid crystal display panel caused by the leakage in the long-time static keeping process can be inhibited, the picture keeping time is prolonged, and the display reliability is improved.
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