Patent ID: 11947204
Assignee: IRIS OPTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A cholesteric liquid crystal display device, comprising:
a liquid crystal display panel, comprising a plurality of pixels; and
a liquid crystal driving unit, electrically coupled to the liquid crystal display panel, wherein the liquid crystal driving unit applies a column driving voltage and a row driving voltage to corresponding to a previously written designated pixel (C) based on a previously written input signal, and after a transmission process of the previously written input signal is completed, the liquid crystal driving unit activates a power-down signal within a time period so as to lower voltage level of the column driving voltage and the row driving voltage for corresponding to a previously written the designated pixel (C), and the liquid crystal driving unit will apply another row driving voltage and another column driving voltage to the specified pixel (D) corresponding to the subsequent writing based on an input signal for subsequent writing, after the input signal for subsequent writing is transmitted, the liquid crystal driving unit activates the voltage reduction signal within the further period of time to reduce the row driving voltage and column driving voltage applied to the specified pixel (D) corresponding to the subsequent writing;
wherein the power-down signal corresponds to a zero voltage circuit so that the column driving voltage and the row driving voltage for the designated pixel are connected to zero voltage.