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

By setting the voltage timing control relationship between the gate-source voltage and source voltage of the switching transistor in the cholesteric liquid crystal display panel, the influence of transistor leakage on bistable holding performance is solved, resulting in longer screen holding time and higher display reliability.

CN122245254APending Publication Date: 2026-06-19ANHUI YUTU TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI YUTU TECH CO LTD
Filing Date
2026-05-15
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In existing cholesteric liquid crystal display panels, leakage current of transistors under specific polarities leads to a decrease in bistable state retention performance, resulting in problems such as fading of display content, decreased reflectivity, or 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, causing them to reverse at different times, preventing liquid crystal polarization, avoiding leakage, and extending the image retention time.

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 display reliability.

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Abstract

This invention discloses a cholesteric liquid crystal display circuit, its driving method, and electronic paper, relating to the field of cholesteric liquid crystal display technology. By setting the voltage timing sequence of the gate driving circuit, the source driving circuit, and the common terminal, the gate-source voltage of the switching transistor tends to converge when the corresponding pixel is in a liquid crystal twisted state, and when the corresponding pixel is in a liquid crystal non-twisted state. Furthermore, in different time periods, when the liquid crystal is in a twisted state, the source voltage of the switching transistor is greater than that of the common terminal, and when the liquid crystal is non-twisted, the source voltage of the switching transistor is less than that of the common terminal. This not only prevents liquid crystal polarization by switching the voltage relationship between the source voltage of the switching transistor and the common terminal, but also suppresses bistable failure, reflectivity reduction, or state mis-switching caused by leakage current during long-term static holding of the cholesteric liquid crystal display panel, extending the image holding time and improving display reliability.
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