Bistable chiral alignment type liquid crystal display and drive method thereof

Abstract

The invention discloses a double-steady state hand-opposite nematic LCD and driving method, which is characterized by the following: each pixel of double-steady state hand-opposite nematic LCD contains at least one transistor as pixel switch of input line voltage and capacitance to reserve pixel voltage, which updates image into plural secondary images with secondary images driving the displayed dielectric corresponding condition according to different driving conditions.

Description

technical field [0001] The invention relates to a bistable anti-chiral nematic liquid crystal display and a driving method thereof; in particular, it relates to a bistable anti-chiral nematic liquid crystal display adopting an active driving method. Background technique [0002] Cholesteric liquid crystal (Cholesteric liquid crystal) is a reflective material that provides grayscale images in hyperchromatic colors. The cholesteric liquid crystal material can also be used as a bistable material, and can have a very wide viewing angle (view angle) after special design, and does not need additional components such as polarizers and color filters. Therefore, cholesteric liquid crystal materials can provide displays with high resolution, high color image quality, low power and low price. [0003] The cholesteric liquid crystal material has two stable states, wherein the reflective state (planar state) of the cholesteric liquid crystal material is stable under zero applied electri...

AI Technical Summary

Problems solved by technology

However, based on the limitations of the passive matrix on the drive, it is difficult to improve the resolution, dynamic picture and display quality of the bistable nematic liquid crystal display.

[0005] Furthermore, Philips provides a dynamic driving method in its U.S. Patent No. 6703995 "bistable chiral nematic liquid crystal display and its driving method" to drive active matrix bistable chiral nematic liquid crystal display , in order to achieve the special waveform of the dynamic driving method, it adopts the 5T1C pixel structure, and in order to control the transistors of this structure, a lot of control signals are added, which increases the cost of the driving system and complicates the design of the pixel structure, thereby reducing the manufacturing yield Rate

In addition, the pixel structure has multiple transistors and capacitors, which reduces the aperture ratio in the pixel and affects the display quality.

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