A method to drive bi-stable liquid crystal displays and related drivers and displays using same are disclosed. The method and driver use additional high impedance states of the outputs to save power while addressing bi-stable and multi-stable liquid crystal displays. The invention implements high impedance states at the driver outputs, allowing non-addressed sections of the display to electrically float and by doing so reduces the required power to drive the display. Other advantages include improved visual effect of an update, such as reduced flash during the update, simpler operation, and better yields due to a larger operating window.

A pixel structure including a first electrode layer, a second electrode layer and a liquid crystal layer is provided. The first electrode layer includes a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes are used for receiving a first driving voltage, and the second electrodes are used for receiving a second driving voltage. The second electrode layer includes a plurality of third electrodes and a plurality of fourth electrodes, wherein the third electrodes are used for receiving a third driving voltage and the fourth electrodes are used for receiving a fourth driving voltage. The liquid crystal layer is disposed between the first electrode layer and the second electrode layer. The first electrodes and the second electrodes are alternately disposed along a first direction parallel to the liquid crystal layer, and the third electrodes and the fourth electrodes are alternately disposed along the first direction.

The invention provides materials and methods (including driving methods) for reducing the effects of remnant voltages in electro-optic displays.

A bistable display system includes a plurality of pixels arranged in pixel rows and pixel columns. Each pixel has a bistable material between first and second transparent and conductive substrates. A bistable display method includes driving the plurality of pixels having at least one target pixel and at least one non-target pixel and applying a voltage difference across at least one target column and at least one target row to switch the at least one target pixel between transparent and opaque states.

The present invention relates to a cholesteric liquid crystal display, a micro processing unit, and a method for hybrid driving. The cholesteric liquid crystal display comprises a display panel and a micro processing unit. First, a grayscale threshold value needs to be set in advance. The micro processing unit will change the grayscale value of the display unit exceeding the grayscale threshold value to the new grayscale value displayed by the bright state color, and display the image by the DDS driving mode. Then the micro processing unit drives the display image in the PWM drive mode, which can greatly improve the color level and contrast display effect of the image.

The present disclosure provides a method for driving a cholesteric liquid crystal display device. The method includes the following steps: utilizing a driving circuit section to sequentially activate each scanning electrode within a display panel; utilizing the driving circuit section to apply first alternating-current (AC) voltage pulses to pixel circuits on an activated scanning electrode during a first stage within a pulse-width modulation (PWM) scanning procedure of an activated scanning electrode; and utilizing the driving circuit section to apply second AC voltage pulses to the pixel circuits on the activated scanning electrode during a second stage of the PWM scanning procedure. A first voltage amplitude and a first period of the first AC voltage pulses are different from a second voltage amplitude and a second period of the second AC voltage pulses, respectively.

A cholesteric liquid crystal display device with efficient charging capability and its charging method are provided. The cholesteric liquid crystal display device comprises a cholesteric liquid crystal display unit, a power unit, and a control unit. The power unit comprising a solar cell module and an energy storage module electrically connected to the solar cell module. When the control unit detects the electrical energy stored in the energy storage module is less than a threshold, the control unit drives the cholesteric liquid crystal display unit to display in the FC state, then allowing the solar cell module to charge. When the control unit detects that the electrical energy stored in the energy storage module is greater than the threshold, the control unit drives the cholesteric liquid crystal display unit to display in the PL state, thereby reduces any afterimages issues that may occur during image transitions of the display device.

A display device is provided, which includes a display panel. The display panel includes a first substrate, a second substrate, a cholesteric liquid-crystal (ChLC) layer, and a driving circuit section. A plurality of first electrodes formed on the first substrate extend in a first direction. A plurality of second electrodes formed on the second substrate extend in a second direction different from the first direction. The ChLC layer is formed between the first substrate and the second substrate. The driving circuit section is configured to apply a plurality of alternating-current (AC) voltage pulses to pixel circuits at intersections between the first electrodes and the second electrodes. The driving circuit section is further configured to perform a full screen reset procedure to the display panel followed by a pulse-width modulation (PWM) scanning procedure to control cholesteric molecules within the pixel circuits to enter a focal conic state.

A serial electronic label, including a plurality of energy saving displays arranged in a row and a controller. Each of the energy saving displays has a frame update time when updating a display frame. The controller is electrically connected to the energy saving displays, and configured to make the energy saving displays update the display frames thereof in a sequence by a one-to-plurality control method, wherein the frame update times of any two energy saving displays adjacent in the sequence partially overlap each other.

A driving method of cholesteric liquid crystal display is provided. A liquid crystal driving unit is used to output row driving voltage to multiple row circuit structures. Sequentially column driving voltage is outputted to multiple column circuit structures in a scanning manner. Scanning a column circuit structure takes one scanning time sequence. When starting the Nth time sequence of pixels to present the image, a ghost elimination voltage is applied to eliminate the image of the Mth time sequence and present it at the image position of the Nth time sequence, where M=N+1 and the ghost elimination voltage is applied at T. By doing so, the phenomenon of ghosts appearing on cholesteric liquid crystal displays can be improved, and the imaging quality of cholesteric liquid crystal displays can be improved.