TWM665534U - Driving system of active matrix cholesterol liquid crystal display device - Google Patents

Abstract

A driving system of an active matrix cholesterol liquid crystal display device comprises a timing controller generating a voltage control instruction, a gate control instruction and an image display instruction according to a static image parameter data, a data enable signal and a vertical synchronization signal; a power supply module generating and outputting a gate drive voltage and a plurality of data drive voltages to an active matrix according to the voltage control instruction. Array cholesterol liquid crystal display device; the device executes a static image display program according to the gate control instruction, the image display instruction, the gate drive voltage and the data drive voltages, the average voltage of the positive and negative data drive voltages in the program is the same, and the total duration of each positive and negative display cycle is equal to avoid the polarization phenomenon of liquid crystal molecules.

Description

Driving system of active matrix cholesterol liquid crystal display device

A driving system for a cholesterol liquid crystal display device, in particular a driving system for an active matrix cholesterol liquid crystal display device.

Cholesteric Liquid Crystal Display (ChLCD) has a bistable liquid crystal display characteristic, which includes two stable states: planar texture and focal conic texture. When the cholesterol liquid crystal is in a planar state, it can reflect light of a certain wavelength, which can also be called a reflective state or a bright state; when the cholesterol liquid crystal is in a focal conic state, the light can be scattered and then penetrated and absorbed by the black light-absorbing film attached to the back of the cholesterol liquid crystal display device, which can also be called a scattering state or a dark state.

When a driving voltage is applied to cholesterol liquid crystal, the liquid crystal molecules will be affected by the electric field to arrange, rotate and produce different arrangements, allowing the cholesterol liquid crystal to change into a planar state or a conical state. By applying different driving voltages to make the cholesterol liquid crystal present a planar state and a conical state coexisting in a certain proportion, the reflectivity of the cholesterol liquid crystal can be changed, thereby allowing the cholesterol liquid crystal to display different gray levels and colors. Due to the bi-stable characteristics, if the driving voltage is stopped, the cholesterol liquid crystal will stably maintain its original state. In other words, only when the driving voltage is applied, the cholesterol liquid crystal display device will change the display screen due to the change of the liquid crystal molecules. If the driving voltage is stopped, the cholesterol liquid crystal display device will continue to maintain the original display screen. Therefore, compared with other display devices, cholesterol liquid crystal display devices are more often used in static image display.

A common passive matrix cholesteric liquid crystal display (PM ChLCD) has a display panel, a scan driver, a data driver, a plurality of scan lines and a plurality of data lines. The display panel has a plurality of display units. The scan driver is connected to the plurality of scan lines. Each scan line is arranged in the horizontal direction and connected to each display unit on the same horizontal line. The data driver is connected to the plurality of data lines. Each data line is arranged in the vertical direction and connected to each display unit on the same vertical line, so that each display unit is connected to one of the scan lines in the horizontal direction and one of the data lines in the vertical direction.

When the passive matrix cholesterol liquid crystal display device displays a static image, the scan driver drives each scan line in sequence according to the order of the plurality of scan lines, and the data driver cooperates with the driving timing of the plurality of scan lines. When each scan line is driven, a corresponding data signal is input into each display unit through the plurality of data lines. Since the passive matrix cholesterol liquid crystal display device needs to drive each scanning line in sequence, and the passive matrix cholesterol liquid crystal display device adopts passive elements, and since the passive matrix cholesterol liquid crystal display device only has indium tin oxide (ITO) wiring and no thin film transistor, it takes a long time to drive each display unit to complete the update of the display screen, and the use of passive elements also causes the passive matrix cholesterol liquid crystal display device to be slow. The contrast of the display screen of a liquid crystal display device is usually low. It is necessary to increase the time for the data driver to input the data signal to each display unit, or increase the number of times the data driver inputs the data signal to each display unit, so that the cholesterol liquid crystal has enough time to enter the focal cone state, so that the dark state screen display area can be darker and achieve the expected contrast. This also leads to a further increase in the update time required for the display screen.

On the other hand, the passive matrix cholesterol liquid crystal display device is controlled by a timing controller. In addition to storing a complete screen data and performing image processing on the screen data to generate corresponding timing signals and data signals, the timing controller also needs to store the corresponding timing data. The data signal and the data signal can be repeatedly input into each liquid crystal unit through the data driver to increase the brightness of the display screen. For this reason, the timing controller needs to have a built-in larger memory or be connected to a storage device, which makes it impossible to reduce the installation cost of the timing controller and the overall device size cannot be further reduced, making it difficult to promote the miniaturization of the driver device of the cholesterol liquid crystal display device.

In addition, when a voltage of the same polarity is continuously applied to the cholesterol liquid crystal display device, the liquid crystal molecules are easily affected by the voltage and polarized, causing the liquid crystal molecules themselves to have a bias, which in turn causes the deflection angle to be different from the expected one, causing the cholesterol liquid crystal display device to produce afterimages, uneven brightness, display abnormalities, etc.

Considering that the current passive matrix cholesterol liquid crystal display device used for static image display requires a long screen update time due to its driving method, the static image cannot be presented instantly and quickly, which easily affects the user experience. In addition, the setting cost of the timing controller is also high, and the liquid crystal molecules are prone to polarization. Therefore, there is room for and necessity for further improvement of cholesterol liquid crystal display devices.

In view of this, the present invention provides a driving system for an active matrix cholesterol liquid crystal display device, in order to improve the screen update speed of the active matrix cholesterol liquid crystal display device, and alternately drive the active matrix cholesterol liquid crystal display device with driving voltages of opposite polarity to avoid polarization of liquid crystal molecules, in order to improve the service life of the active matrix cholesterol liquid crystal display device.

To achieve the above-mentioned purpose, the driving system of the active matrix cholesterol liquid crystal display device is used to control an active matrix cholesterol liquid crystal display device, the active matrix cholesterol liquid crystal display device includes a gate drive element, a data drive element and a plurality of display units electrically connected to the gate drive element and the data drive element respectively. The driving system of the active matrix cholesterol liquid crystal display device includes: a timing controller connected to the active matrix cholesterol liquid crystal display device and based on a static image parameter data, a data enable signal and a vertical synchronization signal, generating a voltage control instruction, a gate control instruction and an image display instruction, outputting the gate control instruction to the gate drive element, and outputting the image display instruction to the data drive element, and controlling the active matrix cholesterol liquid crystal display device to execute a static image display program; a power supply module, connected to the timing controller and the active matrix cholesterol liquid crystal display device, generating a gate drive voltage and a plurality of data drive voltages according to the voltage control instruction, and outputting the gate drive voltage to the gate drive element , and output the plurality of data drive voltages to the data drive element; wherein, in the static image display program, the timing controller controls the timing of the gate drive element to turn on or off the plurality of display units according to the gate control instruction; the gate drive element controls the opening or closing of the plurality of display units according to the gate drive voltage; the timing controller controls the data drive element to output the plurality of data drive voltages to the turned-on plurality of display units according to the image display instruction; the static image display program includes at least one positive display cycle and at least one negative display cycle. Polarity display cycle, in the at least one positive polarity display cycle, the data driving element outputs the plurality of data driving voltages of positive polarity, and in the at least one negative polarity display cycle, the data driving element outputs the plurality of data driving voltages of negative polarity, the total duration of each positive polarity display cycle is equal to the total duration of each negative polarity display cycle, and the average value of one voltage of the plurality of data driving voltages of positive polarity in each positive polarity display cycle is the same as the average value of another voltage of the plurality of data driving voltages of negative polarity in each negative polarity display cycle.

In the present invention, the timing controller controls the operation of the active matrix cholesterol liquid crystal display device through the gate control instruction and the image display instruction, so that the active matrix cholesterol liquid crystal display device can display a static image, and the power supply module generates the gate driving voltage and the multiple data driving voltages provided to the active matrix cholesterol liquid crystal display device according to the voltage control instruction. Compared with the known passive matrix cholesterol liquid crystal display screen and its driving method, the active matrix cholesterol liquid crystal display screen adopts active elements, and the time required to drive the active matrix cholesterol liquid crystal display device to complete the update of the display screen is shorter than the time required for the passive matrix cholesterol liquid crystal display device, and under the same driving voltage, the contrast of the screen presented by the active matrix cholesterol liquid crystal display device is higher than that of the passive matrix cholesterol liquid crystal display device, and the timing controller does not need to be driven by the same data. The voltage repeatedly drives the active matrix cholesterol liquid crystal display device, so the timing controller does not need to add additional memory to store the complete static image. In addition to saving costs, the timing controller does not need to repeatedly drive the active matrix cholesterol liquid crystal display device with the same data driving voltage to improve the contrast of the screen, thereby reducing the time required to update the active matrix cholesterol liquid crystal display device and its display screen. It helps to speed up the display and update speed of static images, providing users with a faster and more stable reading experience.

In addition, in the static image display process, the present invention uses the multiple data driving voltages of positive polarity and negative polarity with opposite polarities but the same voltage value to drive the active matrix cholesterol liquid crystal display device, preventing the liquid crystal molecules in the active matrix cholesterol liquid crystal display device from being polarized due to continuous driving by the driving voltage of the same polarity, which can reduce the occurrence of afterimages in the display screen and increase the service life of the active matrix cholesterol liquid crystal display device.

1: Driving system of active matrix cholesterol liquid crystal display device

10: Timing controller

11: Power control port

12: Gate control port

13: Data control port

14: Temperature communication port

20: Power supply module

21: Power communication port

22: Gate drive voltage port

23: Data drive voltage port

24: Common electrode voltage port

30: Temperature detection module

31: Temperature signal output port

40: Single chip device

41: Processor

411: e-book software

412: Notepad software

413: Video playback software

414: Image parameter lookup table

415: Image processing program

42: Memory

100: Active matrix cholesterol liquid crystal display device

110: Display panel

111: Display unit

112: Common electrode substrate

113: Common electrode voltage receiving port

120: Gate drive element

121:Gateway communication port

122: Gate voltage input port

123: Common electrode voltage input port

124: Common electrode voltage output port

130: Data driver

131: Data port

132: Data voltage input port

Iv: Voltage control command

Ig: Gate control instruction

Id: Image display command

Vg: Gate drive voltage

Vd: Data drive voltage

Vcom: common electrode voltage

DL: Data Line

GL: Gate line

T: Temperature signal

C: Image control signal

C1: Still image display command

Vsync: vertical synchronization signal

DE: Data enable signal

Va: cross pressure

Rp: Positive reset period

Rn: Negative reset cycle

Sp: Positive polarity display cycle

Sn: Negative display cycle

Figure 1: The driving system of the novel active matrix cholesterol liquid crystal display device and the block diagram of the active matrix cholesterol liquid crystal display device.

Figure 2: Another block diagram of the driving system of the novel active matrix cholesterol liquid crystal display device and the active matrix cholesterol liquid crystal display device.

Figure 3A: Schematic diagram of the signal waveform of the image control signal in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 3B: Schematic diagram of the signal waveform of the vertical synchronization signal in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 3C: Schematic diagram of the signal waveform of the data enable signal in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 3D: A schematic diagram of the voltage waveform of the data driving voltage received by one of the display units in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 3E: A schematic diagram of the voltage waveform of the common electrode voltage corresponding to one of the display units in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 3F: Schematic diagram of the voltage waveform across one of the display units in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 4A: Another signal waveform diagram of the image control signal in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 4B: Another signal waveform diagram of the vertical synchronization signal in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 4C: Another signal waveform diagram of the data enable signal in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 4D: Another voltage waveform diagram of the data driving voltage received by one of the display units in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 4E: Another voltage waveform diagram of the common electrode voltage corresponding to one of the display units in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 4F: Another voltage waveform diagram of the cross-voltage of one of the display units in the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 5: Another block diagram of the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 6: Another block diagram of the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 7: Another block diagram of the driving system of the novel active matrix cholesterol liquid crystal display device.

Figure 8: Flow chart of the steps of the static image display method of the novel active matrix cholesterol liquid crystal display device.

Please refer to Figures 1 to 3F. The driving system 1 of the novel active matrix cholesterol liquid crystal display (AM ChLCD) is used to drive an active matrix cholesterol liquid crystal display 100 to display static images. The driving system 1 of the active matrix cholesterol liquid crystal display includes a timing controller 10 (timing controller IC, TCON) and a power supply module 20. The timing controller 10 can be an electronic device with computing and processing functions such as a processor and a microcontroller, and the power supply module 20 can be a power supply.

The timing controller 10 is signal-connected to the active matrix cholesterol liquid crystal display device 100, and has a power control port 11, a gate control port 12 and a data control port 13. The timing controller 10 generates a voltage control command Iv, a gate control command Ig and an image display command Id according to a static image parameter data, a data enable signal DE and a vertical synchronization signal Vsync (Vertical sync, Vsync). The timing controller 10 transmits the voltage control command Iv to the power supply module 20 through the power control port 11, transmits the gate control command Ig to the active matrix cholesterol liquid crystal display device 100 through the gate control port 12, and transmits the gate control command Ig to the active matrix cholesterol liquid crystal display device 100 through the data The control port 13 outputs the image display instruction Id to the active matrix cholesterol liquid crystal display device 100, and the timing controller 10 controls the active matrix cholesterol liquid crystal display device 100 to execute a screen reset procedure and a static image display procedure through the voltage control instruction Iv, the gate control instruction Ig and the image display instruction Id to reset the active matrix cholesterol liquid crystal display device 100. The active matrix cholesterol liquid crystal display device 100 displays a display screen, and the active matrix cholesterol liquid crystal display device 100 presents a static image from the display screen, wherein the static image parameter data includes a voltage parameter corresponding to each pixel in the static image; the voltage control instruction Iv includes driving the active matrix cholesterol liquid crystal display device 100 to display the static image and resetting the display screen. The gate control instruction Ig includes the update timing of each pixel when the active matrix cholesterol liquid crystal display device 100 displays the static image; the image display instruction Id includes the image format information of the static image, and the voltage value corresponding to each pixel in the static image when the active matrix cholesterol liquid crystal display device 100 is driven to display the static image.

The data enable signal DE is a signal used to define each frame period. The data enable signal DE indicates the start and end of a frame, and the refresh rate of the active matrix cholesterol liquid crystal display device 100 can be changed by adjusting the duration of each frame. The timing controller 10 uses the data enable signal DE as a timing reference for controlling the active matrix cholesterol liquid crystal display device 100 to display static images, and generates the corresponding gate control command Ig, the image display command Id and the voltage control command Iv according to the data enable signal DE.

In one embodiment, the timing controller 10 converts the image display command Id into a voltage differential signal (Mini Low-Voltage Differential Signaling; Mini-LVDS) and transmits it to the active matrix cholesterol liquid crystal display device 100.

In one embodiment, the timing controller 10 can pre-set the duration or number of frames of the screen reset procedure and the static image display procedure; when the timing controller 10 determines that the vertical synchronization signal Vsync is at a vertical synchronization trigger level and the data enable signal DE is at a consistent enable trigger level, the timing controller 10 first controls the active matrix cholesterol liquid crystal display device 100 to execute the screen reset procedure; after the screen reset procedure is completed and the data enable signal DE is at the enable trigger level, the timing controller 10 controls the active matrix cholesterol liquid crystal display device 100 to execute the static image display procedure.

In one embodiment, the timing controller 10 determines whether to execute the screen reset procedure or the static image display procedure according to different potentials of the data enable signal DE. When the timing controller 10 determines that the vertical synchronization signal Vsync is at a vertical synchronization trigger potential and the data enable signal DE is at a first potential, the timing controller 10 controls the active matrix cholesterol liquid crystal display device 100 to execute the screen reset procedure; when the timing controller 10 determines that the data enable signal DE is at a second potential, the timing controller 10 controls the active matrix cholesterol liquid crystal display device 100 to execute the static image display procedure.

The power supply module 20 is signal-connected to the timing controller 10 and electrically connected to the active matrix cholesterol liquid crystal display device 100. The power supply module 20 has a power communication port 21, a gate drive voltage port 22, a plurality of data drive voltage ports 23, and a common electrode voltage port 24. The power communication port 21 is connected to the power control port 11 of the timing controller 10, and the power supply module 20 receives the voltage control instruction Iv from the power control port 11 of the timing controller 10 through the power communication port 21; the gate drive voltage port 22, the plurality of data drive voltage ports 23 and the common electrode voltage port 24 are respectively electrically connected to the active matrix cholesterol liquid crystal display device 100, and the power supply module 20 controls the voltage according to the voltage. The instruction Iv generates a gate drive voltage Vg, a plurality of data drive voltages Vd and a common electrode voltage Vcom respectively, and outputs the gate drive voltage Vg through the gate drive voltage port 22, outputs the plurality of data drive voltages Vd respectively through the plurality of data drive voltage ports 23, and outputs the common electrode voltage Vcom through the common electrode voltage port 24, and each data drive voltage port 23 outputs one of the data drive voltages Vd.

The power communication port 21 of the power supply module 20 communicates with the power control port 11 of the timing controller 10 via an Inter-Integrated Circuit (I ² C) so that the timing controller 10 sets and controls the voltage values output by each gate drive voltage port 22, each data drive voltage port 23 and each common electrode voltage port 24 in the power supply module 20 according to the voltage control instruction Iv.

In one embodiment, the power supply module 20 sets the voltage values and polarities of the gate drive voltage Vg, the multiple data drive voltage Vd, and the common electrode voltage Vcom according to the voltage parameters recorded in the voltage control instruction Iv, so as to generate the positive polarity of the gate drive voltage Vg, the multiple data drive voltage Vd, and the common electrode voltage Vcom, and the negative polarity of the gate drive voltage Vg, the multiple data drive voltage Vd, and the common electrode voltage Vcom. The plurality of data driving voltages Vd and the common electrode voltage Vcom are outputted through the gate driving voltage port 22 to control the opening or closing of the gate, the plurality of data driving voltages Vd of positive polarity or negative polarity are outputted through the plurality of data driving voltage ports 23, and the common electrode voltage Vcom of positive polarity or negative polarity is outputted through the at least one common electrode voltage port 24.

As shown in FIG. 1 and FIG. 2 , the active matrix cholesterol liquid crystal display device 100 includes a display panel 110 , a gate driving element 120 and a data driving element 130 . The display panel 110 includes a plurality of display units 111, a common electrode substrate 112, and a cholesterol liquid crystal layer; each display unit 111 is electrically connected between the gate driver element 120 and the data driver element 130, and corresponds to a pixel in the display screen of the active matrix cholesterol liquid crystal display device 100. Each display unit 111 includes at least one transistor. For example, the at least one transistor is N-type. A gate of each transistor is electrically connected to the gate driver element 120, a source is electrically connected to the data driver element 130, and a drain is electrically connected to the display unit 111. 1; the common electrode substrate 112 is provided with a plurality of common electrode voltage receiving ports 113; the cholesterol liquid crystal layer is provided between each of the display units 111 and the common electrode substrate 112, and the liquid crystal molecules in the cholesterol liquid crystal layer generate an electric field according to a cross-voltage Va between each of the display units 111 and the common electrode substrate 112. The arrangement and rotation change the shape, and the cross-voltage Va is the voltage difference between each display unit 111 and the common electrode substrate 112, and the positive polarity cycle and the negative polarity cycle are distinguished by subtracting the common electrode voltage Vcom received by the common electrode substrate 112 from the multiple data driving voltage Vd received by each display unit 111. For example, when the active matrix cholesterol liquid crystal display device 100 resets the screen, the cross-voltage Va between each display unit 111 and the common electrode substrate 112 is used to distinguish the positive reset cycle Rp and the negative reset cycle Rn. When the active matrix cholesterol liquid crystal display device 100 displays the screen after being reset, the cross-voltage Va between each display unit 111 and the common electrode substrate 112 is used to distinguish the positive display cycle Sp and the negative display cycle Sn. The active matrix cholesterol liquid crystal display device 100 resets and controls the display content of the display screen through the changes of the liquid crystal molecules in the cholesterol liquid crystal layer.

The gate driver element 120 is provided with a gate communication port 121, a gate voltage input port 122 and a plurality of gate lines GL. The gate communication port 121 and the gate voltage input port 122 are provided at the input end of the gate driver element 120, and the plurality of gate lines GL are provided at the output end of the gate driver element 120. The gate communication port 121 is signal-connected to the gate control port 12 of the timing controller 10 so as to transmit the gate communication port 121 to the gate control port 12 of the timing controller 10. The gate control command Ig is received from the timing controller 10, and the gate voltage input port 122 is electrically connected to the gate driving voltage port 22 of the power supply module 20 to receive the gate driving voltage Vg from the power supply module 20 through the gate voltage input port 122; the plurality of gate lines GL can output the gate driving voltage Vg respectively, and each gate line GL is respectively connected to a plurality of display units 111 in the same row or column. Specifically, each gate line GL is connected to the gate driving voltage Vg of the power supply module 20. A gate line GL can be connected to the gate of at least one transistor in a plurality of display units 111 in the same row or column, thereby outputting the gate driving voltage Vg output by the power supply module 20 from the gate of each transistor to the plurality of display units 111 in the same row or column, so as to control the at least one transistor in the display units 111 to turn on or off, and control the operation of the corresponding display units 111 through the switch of the at least one transistor. The gate driving element 120 controls the timing of each plurality of gate lines GL outputting the gate driving voltage Vg according to the gate control instruction Ig, wherein the gate driving element 120 can output the gate driving voltage Vg from one or more gate lines GL at the same time according to the gate control instruction Ig, that is, the timing controller 10 can drive the display units 111 on one or more gate lines GL at the same time through the gate control instruction Ig.

In one embodiment, the gate driver element 120 is provided with a common electrode voltage input port 123 and a common electrode voltage output port 124. The common electrode voltage input port 123 is electrically connected to the common electrode voltage port 24 of the power supply module 20 to receive the common electrode voltage Vco from the power supply module 20 through the common electrode voltage port 24. m, the common electrode voltage output port 124 is electrically connected to the plurality of common electrode voltage receiving ports 113 of the common electrode substrate 112 to transmit the common electrode voltage Vcom to the common electrode substrate 112 via the plurality of common electrode voltage receiving ports 113, thereby changing the overall potential of the common electrode substrate 112 by the common electrode voltage Vcom. When the timing controller 10 controls the active matrix cholesterol liquid crystal display device 100 to execute the screen reset procedure, the timing controller 10 controls the gate driving element 120 through the gate control instruction Ig in the screen reset procedure to output the common electrode voltage Vcom from the common electrode voltage output port 124 to the common electrode substrate 112, and resets the display screen of the active matrix cholesterol liquid crystal display device 100 through the cross-voltage Va between each display unit 111 and the common electrode substrate 112.

The data driver element 130 is provided with a data communication port 131, a plurality of data voltage input ports 132 and a plurality of data lines DL. The data communication port 131 and the plurality of data voltage input ports 132 are provided at the input end of the data driver element 130, and the plurality of data lines DL are provided at the output end of the data driver element 130. The data communication port 131 is signal-connected to the data control port 13 of the timing controller 10 to receive the image display instruction Id from the timing controller 10 through the data communication port 131. The plurality of data voltage input ports 132 are electrically connected to the plurality of data driving voltage ports 23 of the power supply module 20 to receive the image display instruction Id through the plurality of data voltage input ports 132. 132 receives the plurality of data driving voltages Vd from the power supply module 20; the plurality of data lines DL can output the plurality of data driving voltages Vd respectively, and each data line DL is respectively connected to the plurality of display units 111 in the same column or row. Specifically, each data line DL can be connected to the source of at least one transistor in the plurality of display units 111 in the same column or row, thereby outputting the plurality of data driving voltages Vd output by the power supply module 20 to the plurality of display units 111 in the same column or row, and the data driving element 130 controls each data line DL to output one of the corresponding data driving voltages Vd according to the image display instruction Id.

In one embodiment, the data driver element 130 is provided with a common electrode voltage input port 123 and a common electrode voltage output port 124. The common electrode voltage input port 123 is electrically connected to the common electrode voltage port 24 of the power supply module 20 to receive the common electrode voltage Vc from the power supply module 20 through the common electrode voltage port 24. om, the common electrode voltage output port 124 is electrically connected to the plurality of common electrode voltage receiving ports 113 of the common electrode substrate 112 to transmit the common electrode voltage Vcom to the common electrode substrate 112 via the common electrode voltage receiving port 113, thereby changing the overall potential of the common electrode substrate 112 by the common electrode voltage Vcom. When the timing controller 10 controls the active matrix cholesterol liquid crystal display device 100 to execute the screen reset procedure, the timing controller 10 controls the data driving element 130 to output the common electrode voltage Vcom to the common electrode substrate 112 from the common electrode voltage output port 124 in the screen reset procedure through the image display instruction Id, and resets the display screen of the active matrix cholesterol liquid crystal display device 100 by the cross voltage Va between each display unit 111 and the common electrode substrate 112.

In FIG. 1 , the plurality of gate lines GL are arranged in parallel with each other in the horizontal direction and each gate line GL is connected to each display unit 111 located in the same row, and the plurality of data lines DL are arranged in parallel with each other in the vertical direction and each data line DL is connected to each display unit 111 located in the same column. One gate line GL and one data line DL are connected to one display unit 111. When the gate line When GL outputs the gate drive voltage Vg to the display unit 111, the display unit 111 is turned on, and the data line DL can send a data drive voltage Vd corresponding to the display unit 111 to the display unit 111, so that the cross-voltage Va between the display unit 111 and the common electrode substrate 112 changes due to the data drive voltage Vd, thereby controlling the grayscale, brightness and color of a pixel corresponding to the display unit 111.

The at least one transistor in each display unit 111 may be a thin film transistor (TFT); the gate driver element 120 may be a driver chip. For example, if the at least one transistor is N-type, the gate driver element 120 is used to control the switching of each transistor by turning on or off the gate of the at least one transistor in the same row or column of display units 111. The gate driver element 120 may also be called a scanning driver element; the data driver element 13 0 can also be a driver chip. For example, when the at least one transistor is N-type, the data driver element 130 is used to input different voltages from the source of the at least one transistor when the at least one transistor in each display unit 111 is turned on, thereby changing the cross-voltage Va between each display unit 111 and the common electrode substrate 112 to control the brightness, color, and grayscale of the pixel corresponding to each display unit 111.

In FIG. 2 , the common electrode substrate 112 is provided with two common electrode voltage receiving ports 113, and the gate driver 120 and the data driver 130 are provided with a common electrode voltage input port 123 and a common electrode voltage output port 124, respectively, to receive the common electrode voltage Vcom and output the common electrode voltage Vco. m is transmitted to the common electrode substrate 112 through different common electrode voltage receiving ports 113, and the common electrode voltage output port 124 of the gate driver element 120 is electrically connected to one of the common electrode voltage receiving ports 113, and the common electrode voltage output port 124 of the data driver element 130 is electrically connected to the other common electrode voltage receiving port 113. 13 is an example. When the timing controller 10 controls the active matrix cholesterol liquid crystal display device 100 to execute the screen reset procedure, the timing controller 10 controls the gate driving element 120 to output the common electrode voltage Vcom to the common electrode substrate 112 through one of the common electrode voltage receiving ports 113 in the screen reset procedure through the gate control instruction Ig, and controls the data driving element 130 to output the common electrode voltage Vcom to the common electrode substrate 112 through another common electrode voltage receiving port 113 in the screen reset procedure through the image display instruction Id, so as to reset the display screen of the active matrix cholesterol liquid crystal display device 100.

When the timing controller 10 controls the active matrix cholesterol liquid crystal display device 100 to execute the static image display program, on the one hand, the timing controller 10 controls the gate drive element 120 to output the timing of the gate drive voltage Vg from the plurality of gate lines GL in the static image display program through the gate control instruction Ig, and on the other hand, the timing controller 10 controls the data drive element 130 to output one of the corresponding data drive voltages Vd from the plurality of data lines DL in the static image display program through the image display instruction Id, so as to display the static image on the display screen of the active matrix cholesterol liquid crystal display device 100.

In other words, the timing controller 10 outputs the voltage control instruction Iv, the gate control instruction Ig and the image display instruction Id corresponding to the static image data to the power supply module 20, the gate drive element 120 and the data drive element 130 respectively. The timing controller 10 determines the switching timing of the at least one transistor in each display unit 111 through the gate control instruction Ig, and transmits the gate drive voltage Vg to the corresponding display units 111 through each gate line GL according to the switching timing in the gate control instruction Ig, so that each display unit 111 is switched on and off. The opening or closing of at least one transistor in the display unit 111 is determined by the gate control command Ig, and the timing controller 10 sets different data driving voltages Vd output to each display unit 111 through the plurality of data lines DL according to the image display command Id when each display unit 111 is turned on. A pixel corresponding to each display unit 111 can drive the voltage Vd according to the input different data, so that different cross-voltages Va are generated between each display unit 111 and the common electrode substrate 112, thereby displaying the grayscale, brightness, and color corresponding to the static image.

It should be noted that this embodiment is an example of an active matrix cholesterol liquid crystal display device 100 to facilitate the description of the driving system and driving method of the new type, but the active matrix cholesterol liquid crystal display device 100 is not limited to this embodiment, and the cholesterol liquid crystal layer in the active matrix cholesterol liquid crystal display device 100 can be a single-color cholesterol liquid crystal layer, a two-color cholesterol liquid crystal layer, or a multi-color cholesterol liquid crystal layer. The structure of the active matrix cholesterol liquid crystal display device 100 is not the focus of this case, so it is not elaborated here.

Please refer to FIG. 3A to FIG. 3F. The vertical axes of FIG. 3A to FIG. 3F are voltages, and the units can be volts (V). The horizontal axes are time, and the units can be milliseconds (ms). FIG. 3D to FIG. 3F correspond to the data driving voltages Vd, the common electrode voltage Vcom, and the cross-voltage Va generated by the data driving voltages Vd and the common electrode voltage Vcom received by one of the display units 111. After a static image display instruction C1 in an image control signal C is triggered, the timing controller 10 controls the active matrix cholesterol liquid crystal display device 100 to execute the screen reset procedure and the static image display procedure.

The screen reset procedure may include at least one positive reset cycle Rp and at least one negative reset cycle Rn. In the at least one positive reset cycle Rp, the display unit 111 receives the negative common electrode voltage Vcom from the common electrode substrate 112, and in the at least one negative reset cycle Rn, the display unit 111 receives the positive common electrode voltage Vcom from the common electrode substrate 112. Among them, the voltage value of the negative common electrode voltage Vcom is the same as the voltage value of the positive common electrode voltage Vcom, and the total duration of the at least one positive reset cycle Rp is equal to the total duration of the at least one negative reset cycle Rn. Since the negative common electrode voltage Vcom and the positive common electrode voltage Vcom not only have the same voltage duration but also have the same voltage value, it means that in the screen reset procedure, the total voltage average value of the negative common electrode voltage Vcom plus the positive common electrode voltage Vcom is zero.

In the embodiments of FIG. 3A to FIG. 3F, the screen reset procedure includes a plurality of positive reset cycles Rp and a plurality of negative reset cycles Rn. In the screen reset procedure, the plurality of positive reset cycles Rp and the plurality of negative reset cycles Rn are arranged in sequence so that one positive reset cycle Rp is connected between two negative reset cycles Rn, and one negative reset cycle Rn is connected between two positive reset cycles Rp.

Further referring to FIG. 3D to FIG. 3F , in the screen reset procedure, the data driving element 130 does not output any data driving voltage Vd to the display unit 111, which means that the corresponding data driving voltage Vd received by the display unit 111 is zero. For the display unit 111 of the pixel electrode substrate, the cross voltage Va between the pixel electrode substrate and the common electrode substrate 112 is the common electrode voltage Vcom received by the common electrode substrate 112. Therefore, in the screen reset procedure, the voltage waveform of the cross voltage Va of the display unit 111 is the same as the voltage waveform of the received common voltage, but the polarity is opposite. In other words, the data drive voltage Vd of zero minus the common electrode voltage Vcom is equal to the cross-voltage Va waveform with the opposite polarity to the common electrode voltage Vcom.

In the static image display procedure, the static image display procedure may include at least one positive polarity display period Sp and at least one negative polarity display period Sn. In the present embodiment, the static image display procedure includes a positive polarity display period Sp and a negative polarity display period Sn as an example. In the at least one positive polarity display period Sp, the display unit The display unit 111 receives the positive data driving voltages Vd from the data driving element 130, and in the at least one negative display period Sn, the display unit 111 receives the negative data driving voltages Vd from the data driving element 130, wherein the positive data driving voltages Vd in each positive display period Sp are The voltage average value is the same as the voltage average value of the negative data driving voltages Vd in each negative display period Sn, and the total duration of each positive display period Sp is equal to the total duration of each negative display period Sn. d not only has the same duration of voltage, but also has the same average voltage value, which means that when the number of at least one positive display cycle Sp and the number of at least one negative display cycle Sn in the static image display process are the same, the total average voltage of the positive data driving voltage Vd plus the negative data driving voltage Vd is zero.

Further referring to FIGS. 3D to 3F , in the static image display process, the common electrode substrate 112 does not receive any of the common electrode voltage Vcom, which means that the overall voltage of the common electrode substrate 112 is zero. For the display unit 111 of the pixel electrode substrate, the cross-voltage Va between the pixel electrode substrate and the common electrode substrate 112 is the received data driving voltage Vd. Therefore, in the static image display process, the voltage waveform of the cross-voltage Va of the display unit 111 is the same as the voltage waveform of the received data driving voltages Vd. In other words, the data driving voltage Vd minus the common electrode voltage Vcom which is zero is equal to the cross voltage Va waveform which is the same as the data driving voltage Vd.

Please refer to FIG. 4A to FIG. 4F. The vertical axes of FIG. 4A to FIG. 4F are voltages, and the units can be volts (V). The horizontal axes are time, and the units can be milliseconds (ms). FIG. 4D to FIG. 4F correspond to the data driving voltages Vd, the common electrode voltage Vcom, and the cross-voltage Va generated by the data driving voltages Vd and the common electrode voltage Vcom received by one of the display units 111. After the static image display instruction C1 in the image control signal C is triggered, the timing controller 10 controls the active matrix cholesterol liquid crystal display device 100 to execute the screen reset procedure and the static image display procedure.

In the embodiment of FIG. 4A to FIG. 4F, the duration of the screen reset procedure is twice the duration of the screen reset procedure in the embodiment of FIG. 3A to FIG. 3F. It can be seen from FIG. 3A to FIG. 3F compared with FIG. 4A to FIG. 4F that no matter how long the screen reset procedure is, the total duration of the at least one positive polarity reset period Rp and the at least one negative polarity reset period Rn in the screen reset procedure is the same, the average voltage value is the same, and the voltage polarity is symmetrical to each other. In the static image display procedure, the at least one positive polarity display period Sp and the at least one negative polarity display period Sn also have the same total duration, the same average voltage value, and the voltage polarity is symmetrical to each other. The polarities are mutually symmetrical, so that whether in the screen reset process or the static image display process, the new driving system applies voltages of opposite positive and negative polarities but the same voltage value to the active matrix cholesterol liquid crystal display device 100 to complete the polarity reversal of the active matrix cholesterol liquid crystal display device 100, and prevent the active matrix cholesterol liquid crystal display device 100 from being driven by the voltage of the same polarity for a long time, so that the polarization of the liquid crystal molecules generates a self-bias, thereby avoiding the active matrix cholesterol liquid crystal display device 100 from generating afterimages, uneven brightness, display abnormalities, etc. due to the self-bias of the liquid crystal molecules.

In the embodiments of FIGS. 3A to 3F and 4A to 4F, the static image display process may include a plurality of positive display cycles Sp and a plurality of negative display cycles Sn, and the number of cycles of the plurality of positive display cycles Sp and the plurality of negative display cycles Sn are the same, and the total duration of the plurality of positive display cycles Sp is equal to the total duration of the plurality of negative display cycles Sn, wherein, The voltage average value of the positive data driving voltages Vd in the plurality of positive display cycles Sp is the same as the voltage average value of the negative data driving voltages Vd in the plurality of negative display cycles Sn, and in the static image display process, the total voltage average value of the positive data driving voltages Vd plus the negative data driving voltages Vd is also zero. It should be noted that the average voltage value of the positive data driving voltages Vd in each positive display cycle Sp is the same as the average voltage value of the negative data driving voltages Vd in each negative display cycle Sn, and in a positive display cycle Sp and a negative display cycle Sn, the total average voltage value of the positive data driving voltages Vd plus the negative data driving voltages Vd is also zero.

On the other hand, the plurality of positive display periods Sp and the plurality of negative display periods Sn in the static image display process are arranged in an alternate order, such that one positive display period Sp is connected between two negative display periods Sn, and one negative display period Sn is connected between two positive display periods Sp. It should be noted that in the static image display process, under the condition that the total voltage average value of the positive data driving voltage Vd of each positive display cycle Sp plus the negative data driving voltage Vd of each negative display cycle Sn is zero, the order of the plurality of positive display cycles Sp and the plurality of negative display cycles Sn in the static image display process can be arranged arbitrarily, and is not limited to this embodiment.

As shown in FIG. 1 , in one embodiment, the driving system 1 of the active matrix cholesterol liquid crystal display device includes a temperature detection module 30, the temperature detection module 30 has a temperature signal output port 31, and the timing controller 10 has a temperature communication port 14, the temperature detection module 30 is connected to the temperature communication port 14 of the timing controller 10 through the temperature signal output port 31, and the temperature detection module 30 is disposed inside the active matrix cholesterol liquid crystal display device 100, or disposed on the active matrix cholesterol liquid crystal display device 100, for example, disposed on the active matrix cholesterol liquid crystal display device 100. The temperature detection module 30 is arranged on a circuit board inside the active matrix cholesterol liquid crystal display device 100, or is arranged on the outer surface of the active matrix cholesterol liquid crystal display device 100. The temperature detection module 30 senses a device temperature of the active matrix cholesterol liquid crystal display device 100 and generates a temperature signal T according to the device temperature. The temperature signal output port 31 of the temperature detection module 30 transmits the temperature signal T to the timing controller 10 via the temperature communication port 14, wherein the temperature signal output port 31 of the temperature detection module 30 communicates with the temperature communication port 14 of the timing controller 10 by means of an integrated bus circuit.

Since the liquid crystal molecules may change their attraction or viscosity when the active matrix cholesterol liquid crystal display device 100 is at different device temperatures, when the attraction or viscosity between the liquid crystal molecules is higher, a larger voltage needs to be applied to drive the active matrix cholesterol liquid crystal display device 100 to operate. On the contrary, when the attraction or viscosity between the liquid crystal molecules is lower, a smaller voltage needs to be applied to drive the active matrix cholesterol liquid crystal display device 100 to operate. The cholesterol liquid crystal display device 100 operates, so the timing controller 10 stores a preset temperature-voltage table inside, and the temperature-voltage table records the relationship between different device temperatures and different voltage values for driving the active matrix cholesterol liquid crystal display device 100. For example, the temperature-voltage table can record the different voltage values for driving the active matrix cholesterol liquid crystal display device 100 to display various screens or reset the screen at each device temperature.

When the timing controller 10 receives the temperature signal T, the timing controller 10 adjusts the voltage control instruction Iv with the temperature voltage table according to the temperature signal T, and then transmits the voltage control instruction Iv to the power supply module 20. By adjusting the voltage control instruction Iv, the voltage values of the gate drive voltage Vg, the multiple data drive voltage Vd and the common electrode voltage Vcom generated by the power supply module 20 are adjusted, so that the timing controller 10 can adjust the voltage output to the active matrix cholesterol liquid crystal display device 100 according to the different device temperatures of the active matrix cholesterol liquid crystal display device 100.

For example, when the device temperature of the active matrix cholesterol liquid crystal display device 100 increases, the timing controller 10 determines that the voltages output to the active matrix cholesterol liquid crystal display device 100 need to be reduced according to the temperature signal T and the temperature voltage meter. The timing controller 10 adjusts the voltage control instruction Iv output to the power supply module 20, so that the power supply module 20 reduces the voltage values of the gate drive voltage Vg, the multiple data drive voltage Vd, and the common electrode voltage Vcom according to the voltage control instruction Iv. ; When the device temperature of the active matrix cholesterol liquid crystal display device 100 decreases, the timing controller 10 determines that the voltages output to the active matrix cholesterol liquid crystal display device 100 need to be increased according to the temperature signal T and the temperature voltage meter. The timing controller 10 adjusts the voltage control instruction Iv output to the power supply module 20, so that the power supply module 20 increases the voltage values of the gate drive voltage Vg, the multiple data drive voltage Vd and the common electrode voltage Vcom according to the voltage control instruction Iv.

In this way, the timing controller 10 can make the various voltages output to the active matrix cholesterol liquid crystal display device 100 more consistent with the driving voltage required by the active matrix cholesterol liquid crystal display device 100 at the device temperature, avoid unnecessary power consumption, improve the overall power utilization efficiency of the active matrix cholesterol liquid crystal display device 100, and ensure that the active matrix cholesterol liquid crystal display device 100 can still accurately present the brightness and color of the display screen at different device temperatures.

5 and 6, the driving system 1 of the active matrix cholesterol liquid crystal display device applies a single chip system (System on a Chip, SoC), and further includes a single chip device 40, the single chip device 40 includes a processor 41 and a memory 42, the processor 41 is electrically connected to the memory 42, and the processor 41 performs image processing on a static image data to generate the static image parameter data according to a voltage parameter corresponding to each pixel in the static image data, and the vertical synchronization signal Vsync and the data enable signal DE corresponding to the static image parameter data, and the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE are generated. The vertical synchronization signal Vsync and the data enable signal DE are stored in the memory 42; the memory 42 signal is connected to the timing controller 10, and the timing controller 10 receives the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE from the memory 42, wherein the processor 41 can set the duration of the screen reset procedure and/or the static image display procedure according to the corresponding timing relationship between the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE.

In an embodiment of FIG. 5 , the timing controller 10 may be a hardware timing controller 10, which is disposed outside the single-chip device 40 and is signal-connected to the single-chip device 40 to receive the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE from the single-chip device 40, wherein the single-chip device 40 communicates with the timing controller 10 via low-voltage differential signaling (LVDS) and serial peripheral interface (SPI), or further communicates with the timing controller 10 via mobile industry processor interface (MIPI) to transmit the vertical synchronization signal Vsync, the static image parameter data and the data enable signal DE to the timing controller 10.

In an embodiment of FIG. 6 , the timing controller 10 may be a software timing controller 10, which is disposed in the single-chip device 40 and is signal-connected to the memory 42 to receive the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE from the single-chip device 40.

In one embodiment, the memory 42 stores device characteristic data of the active matrix cholesterol liquid crystal display device 100, and the device characteristic data includes information related to driving time required for different driving voltages corresponding to different material characteristics of liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100, and the material characteristics of liquid crystal molecules include viscosity, fluidity, molecular distance, molecular arrangement, etc. of liquid crystal molecules. For example, when the viscosity of the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100 is higher, it means that under the same driving voltage, compared with other cholesterol liquid crystal display devices with lower viscosity of liquid crystal molecules, the active matrix cholesterol liquid crystal display device 100 requires a longer driving time to allow the liquid crystal molecules of the active matrix cholesterol liquid crystal display device 100 to rotate to the desired arrangement state.

The processor 41 adjusts the timing relationship between the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE according to the device characteristic data, so as to adjust the duration of the screen reset procedure and/or the static image display procedure according to the corresponding timing relationship between the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE, for example, the number of frames corresponding to the screen reset procedure and/or the static image display procedure is adjusted according to the device characteristic data. For example, if according to the material properties of the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100, the device characteristic data is recorded in the corresponding driving circuit When the driving time required to drive the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100 to rotate is longer, the processor 41 can increase the duration of the screen reset procedure and/or the static image display procedure according to the device characteristic data; on the contrary, if the driving time required to drive the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100 to rotate is shorter under the corresponding driving voltage recorded in the device characteristic data according to the material characteristics of the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100, the processor 41 can shorten the duration of the screen reset procedure and/or the static image display procedure according to the device characteristic data.

In another embodiment, the memory 42 stores device characteristic data of the active matrix cholesterol liquid crystal display device 100, and the device characteristic data includes information related to driving voltages required for different driving times corresponding to different material characteristics of liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100, and the material characteristics of liquid crystal molecules include viscosity, fluidity, molecular distance, molecular arrangement, etc. of liquid crystal molecules. For example, when the viscosity of the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100 is higher, it means that under the same driving time, compared with other cholesterol liquid crystal display devices with lower viscosity of liquid crystal molecules, the active matrix cholesterol liquid crystal display device 100 requires a larger driving voltage to rotate the liquid crystal molecules of the active matrix cholesterol liquid crystal display device 100 to the desired arrangement state.

Under the timing relationship corresponding to the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE, the processor 41 adjusts the voltage parameter corresponding to each pixel in the static image parameter data according to the device characteristic data, so that the timing controller 10 performs the static image display according to the vertical synchronization signal Vsync, the data enable signal DE and the adjusted static image. After the image parameter data generates the voltage control instruction Iv and the image display instruction Id, the power supply module 20 can generate a driving voltage that meets the device characteristics of the active matrix cholesterol liquid crystal display device 100 according to the voltage control instruction Iv, and the timing controller 10 can control the data driving element 130 to output the driving voltage that meets the device characteristics of the active matrix cholesterol liquid crystal display device 100 to the corresponding display units 111. For example, if according to the material properties of the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100, the device characteristic data records that under the corresponding screen reset procedure and/or the static image display procedure, the driving voltage required to drive the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100 to rotate is larger, the processor 41 can adjust the static image parameter data according to the device characteristic data to increase the voltage value of the driving voltage output by the power supply module 20. On the contrary, according to the material properties of the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100, the device characteristic data is recorded in the corresponding screen reset procedure and/or the static image display procedure. When the driving voltage required to drive the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100 to rotate is smaller, the processor 41 can adjust the static image parameter data according to the device characteristic data to reduce the voltage value of the driving voltage output by the power supply module 20.

The driving system 1 of the new active matrix cholesterol liquid crystal display device can adjust the driving mode suitable for the active matrix cholesterol liquid crystal display device 100 according to the device characteristics of different active matrix cholesterol liquid crystal display devices 100, thereby improving the control accuracy of the active matrix cholesterol liquid crystal display device 100, avoiding unnecessary power consumption, and meeting the control requirements of different active matrix cholesterol liquid crystal display devices 100.

Please refer to FIG. 7 , the processor 41 includes an electronic book software 411, a notepad software 412, an image playback software 413, a plurality of image parameter lookup tables 414 and an image processing program 415. The processor 41 can receive the static image data of the electronic book that the user wants to read from the electronic book software 411, receive the static image data of the notepad that the user wants to read from the notepad software 412, or receive the static image data of the file that the user wants to read from the image playback software 413; each image parameter lookup table 414 corresponds to a different image format, and each image parameter lookup table 414 includes voltage parameters corresponding to image information such as different brightness and saturation under the corresponding image format; The image processing program 415 is connected to the electronic book software 411, the notepad software 412 and the image playback software 413 to receive the static image data from the electronic book software 411, the notepad software 412 and/or the image playback software 413, and performs image processing on the static image data according to the image format of the static image data generated by the electronic book software 411, the notepad software 412 and/or the image playback software 413 and one of the image parameter lookup tables 414 of the image format to generate the static image parameter data of the static image data, wherein the processor 41 runs a Linux operating system and/or an Android operating system.

The e-book software 411, the notepad software 412 and the image playback software 413 can receive an image control signal C generated by the user's operation on the active matrix cholesterol liquid crystal display device 100. For example, when the user wants to read an e-book in the e-book software 411 and operates the active matrix cholesterol liquid crystal display device 100 accordingly, the e-book software 411 receives the image control signal C generated by the user's operation, and determines that the user wants to read the e-book according to the image control signal C. The e-book software 411 outputs a static image data of the e-book according to the image control signal C.

In one embodiment, the processor 41 can receive user setting data input by the user through the e-book software 411, the notepad software 412 and the image playback software 413. The user setting data includes the contrast, image enhancement, and other settings of the display screen of the active matrix cholesterol liquid crystal display device 100 set by the user through the e-book software 411, the notepad software 412 and the image playback software 413. , brightness and chroma, the memory 42 stores a display characteristic data, which includes the relationship between the values of different display parameters at each driving voltage and the duration of the screen reset process and/or the static image display process, and the relationship between the values of different display parameters at each driving duration and the voltage value of the driving voltage of the active matrix cholesterol liquid crystal display device 100.

On the one hand, the processor 41 can adjust the timing relationship among the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE according to the user setting data and the display characteristic data, so as to adjust the duration of the picture reset procedure and/or the static image display procedure according to the corresponding timing relationship among the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE, for example, adjust the frame number corresponding to the picture reset procedure and/or the static image display procedure according to the display characteristic data, so that the display screen of the active matrix cholesterol liquid crystal display device 100 meets the user's display setting. For example, if a display parameter corresponding to the contrast in the user setting data is higher, and the display characteristic data records that under the corresponding driving voltage, the higher display parameter corresponds to a longer driving time, the processor 41 can increase the duration of the screen reset process and/or the static image display process according to the display characteristic data; conversely, if a display parameter corresponding to the contrast in the user setting data is higher, the processor 41 can increase the duration of the screen reset process and/or the static image display process according to the display characteristic data. When the display parameter is low, and the display characteristic data records the corresponding driving voltage, the lower display parameter corresponds to a shorter driving time, and the processor 41 can shorten the duration of the screen reset process and/or the static image display process according to the display characteristic data, so that the display screen of the active matrix cholesterol liquid crystal display device 100 reaches the contrast corresponding to the display parameter.

On the other hand, under the time relationship corresponding to the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE, the processor 41 adjusts the voltage parameter corresponding to each pixel in the static image parameter data according to the user setting data and the display characteristic data, so that the timing controller 10 can adjust the voltage parameter corresponding to each pixel in the static image parameter data according to the vertical synchronization signal Vsync. After the voltage control instruction Iv and the image display instruction Id are generated by the sync, the data enable signal DE and the adjusted static image parameter data, the power supply module 20 can generate a driving voltage that meets the user's display settings according to the voltage control instruction Iv, and the timing controller 10 can control the data drive element 130 to output the driving voltage that meets the user's display settings to the corresponding display units 111. For example, if a display parameter corresponding to contrast in the user setting data is higher, and the display characteristic data records that under the corresponding screen reset procedure and/or the static image display procedure, the higher display parameter corresponds to a larger driving voltage, the processor 41 can increase the voltage value of the driving voltage output by the power supply module 20 according to the display characteristic data; On the contrary, if a display parameter corresponding to the contrast in the user setting data is lower, and the display characteristic data records that under the corresponding screen reset procedure and/or the static image display procedure, the lower display parameter corresponds to a smaller driving voltage, the processor 41 can reduce the voltage value of the driving voltage output by the power supply module 20 according to the display characteristic data.

Please refer to FIG8 , the static image display method of the novel active matrix cholesterol liquid crystal display device 100 is used to control an active matrix cholesterol liquid crystal display device 100. The static image display method of the active matrix cholesterol liquid crystal display device 100 is executed by the driving system 1 of the active matrix cholesterol liquid crystal display device and includes the following steps.

S10: Generate a voltage control command Iv, a gate control command Ig and an image display command Id according to a static image parameter data, a data enable signal DE and a vertical synchronization signal Vsync.

S20: Generate a gate drive voltage Vg, multiple data drive voltages Vd and a common electrode voltage Vcom according to the voltage control instruction Iv.

S30: Execute a screen reset procedure, in which the gate drive voltage Vg is output to the multiple display units 111 of the active matrix cholesterol liquid crystal display device 100 to control the opening or closing of the multiple display units 111, the switching timing of the multiple display units 111 is controlled according to the gate control instruction Ig, and the common electrode voltage Vcom is output to the multiple display units 111 that are turned on, so that the multiple display units 111 that are turned on perform screen reset.

In step S30, the screen reset procedure includes at least one positive reset cycle Rp and at least one negative reset cycle Rn. In the at least one positive reset cycle Rp, the negative common electrode voltage Vcom is output to the turned-on multiple display units 111, and in the at least one negative reset cycle Rn, the positive common electrode voltage Vcom is output to the turned-on multiple display units 111, wherein , the voltage value of the negative common electrode voltage Vcom is the same as the voltage value of the positive common electrode voltage Vcom, and the total duration of the at least one positive reset cycle Rp is equal to the total duration of the at least one negative reset cycle Rn, and in the screen reset procedure, the average value of the total voltage of the negative common electrode voltage Vcom plus the positive common electrode voltage Vcom is zero.

S40: Execute a static image display program. In the static image display program, the gate drive voltage Vg is output to the multiple display units 111 of the active matrix cholesterol liquid crystal display device 100 to control the opening or closing of the multiple display units 111, and the switching timing of the multiple display units 111 is controlled according to the gate control instruction Ig, and the multiple data drive voltage Vd is output to the multiple display units 111 that are turned on, so that the multiple display units 111 that are turned on display a static image.

In step S40, the static image display process includes at least one positive display cycle Sp and at least one negative display cycle Sn. In the at least one positive display cycle Sp, the positive multiple data driving voltage Vd is output to the turned-on multiple display units 111, and in the at least one negative display cycle Sn, the negative multiple data driving voltage Vd is output to the turned-on multiple display units 111, wherein the positive multiple data driving voltage Vd in each positive display cycle Sp is The voltage average value of the voltage Vd is the same as the voltage average value of the negative multiple data driving voltage Vd in each negative display cycle Sn, and the total duration of each positive display cycle Sp is equal to the total duration of each negative display cycle Sn, and in a positive display cycle Sp and a negative display cycle Sn of the static image display process, the total voltage average value of the positive multiple data driving voltage Vd plus the negative multiple data driving voltage Vd is zero.

Furthermore, after executing step S10, the following steps may be further executed.

S11: Detecting a device temperature of the active matrix cholesterol liquid crystal display device 100, generating a temperature signal T according to the device temperature, and adjusting the voltage control instruction Iv with a temperature voltmeter according to the temperature signal T.

In one embodiment, the step S10 further adjusts the timing relationship between the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE according to a device characteristic data, and adjusts the duration of the screen reset procedure and the static image display procedure according to the corresponding timing relationship between the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE.

In one embodiment, the step S10 further adjusts the voltage parameter corresponding to each pixel in the static image parameter data according to a device characteristic data; the step S20 generates the voltage control instruction Iv and the image display instruction Id according to the vertical synchronization signal Vsync, the data enable signal DE and the adjusted static image parameter data, so as to generate the gate drive voltage Vg, the multiple data drive voltages Vd and the common electrode voltage Vcom that meet the device characteristics of the active matrix cholesterol liquid crystal display device 100 according to the voltage control instruction Iv in step S30.

In one embodiment, the step S10 further receives a user setting data input by the user, and adjusts the timing relationship between the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE according to the user setting data and a display characteristic data of the active matrix cholesterol liquid crystal display device 100, and adjusts the duration of the screen reset procedure and the static image display procedure according to the corresponding timing relationship between the static image parameter data, the vertical synchronization signal Vsync and the data enable signal DE.

In one embodiment, the step S10 further receives a user setting data input by the user, and adjusts the voltage parameter corresponding to each pixel in the static image parameter data according to the user setting data and a display characteristic data of the active matrix cholesterol liquid crystal display device 100; the step S20 generates the voltage control instruction Iv and the image display instruction Id according to the vertical synchronization signal Vsync, the data enable signal DE and the adjusted static image parameter data, so as to generate the gate drive voltage Vg, the multiple data drive voltage Vd and the common electrode voltage Vcom that meet the user setting according to the voltage control instruction Iv in step S30.

In the driving system 1 of the novel active matrix cholesterol liquid crystal display device and its static image display method, the timing controller 10 controls the power supply module 20 through the voltage control instruction Iv to generate the gate driving voltage Vg, the multiple data driving voltage Vd and the common electrode voltage Vcom provided to the active matrix cholesterol liquid crystal display device 100, and then controls the operation of the active matrix cholesterol liquid crystal display device 100 through the gate control instruction Ig and the image display instruction Id, so that the active matrix cholesterol liquid crystal display device 100 can display a static image.

The timing controller 10 in the present invention does not need to perform image processing on the static image data, but the processor 41 at the front end of the timing controller 10 executes the image processing program on the static image data. Compared with the known passive matrix cholesterol liquid crystal display device driving system, the timing controller 10 only needs to generate corresponding instructions according to the static image parameter data processed by the processor 41, and does not need to set up additional storage space for the timing controller 10 to store the complete static image data for the timing controller 10 to use, which helps to reduce the equipment cost generated by setting up additional storage space and reduce the overall equipment volume of the driving system 1 of the active matrix cholesterol liquid crystal display device.

On the other hand, the present invention is applied to the active matrix cholesterol liquid crystal display device 100. Since the active matrix cholesterol liquid crystal display device 100 adopts active elements, the time required to drive the active matrix cholesterol liquid crystal display device 100 to complete the update of the display screen is shorter than the time required for the passive matrix cholesterol liquid crystal display device. Moreover, under the same driving voltage, the contrast of the screen presented by the active matrix cholesterol liquid crystal display device 100 is higher than that of the passive matrix cholesterol liquid crystal display device. The screen contrast of the active matrix cholesterol liquid crystal display device is higher. The timing controller 10 does not need to repeatedly drive the active matrix cholesterol liquid crystal display device 100 with the same data driving voltage Vd to improve the contrast of the screen. It can also further reduce the time required to update the active matrix cholesterol liquid crystal display device 100 to display the screen, which helps to speed up the display and update speed of static images, providing users with a faster and more stable reading experience.

In addition, in the screen reset process, the present invention uses the positive common electrode voltage Vcom and the negative common electrode voltage Vcom with opposite polarity but the same voltage value to drive the active matrix cholesterol liquid crystal display device 100. Similarly, in the static image display process, the present invention also uses the positive common electrode voltage Vcom with opposite polarity but the same average voltage value. The active matrix cholesterol liquid crystal display device 100 is driven by the plurality of data driving voltages Vd and the plurality of data driving voltages Vd of the negative polarity, thereby preventing the liquid crystal molecules in the active matrix cholesterol liquid crystal display device 100 from polarizing, reducing the occurrence of afterimages in the display screen, and increasing the service life of the active matrix cholesterol liquid crystal display device 100.

The present invention can further adjust the duration of the screen reset process and/or the static image display process, and the gate drive voltage Vg and the complex voltage Vg output to the active matrix cholesterol liquid crystal display device 100 according to the device characteristic data of the active matrix cholesterol liquid crystal display device 100 or the user setting data set by the user. The digital driving voltage Vd and the common electrode voltage Vcom are used to control the active matrix cholesterol liquid crystal display device 100 in accordance with different device characteristics of the active matrix cholesterol liquid crystal display device 100 or driving methods of different display requirements of users, which helps to improve the driving accuracy of the active matrix cholesterol liquid crystal display device 100.

1: Driving system of active matrix cholesterol liquid crystal display device

10: Timing controller

11: Power control port

12: Gate control port

13: Data control port

14: Temperature communication port

20: Power supply module

21: Power communication port

22: Gate drive voltage port

23: Data drive voltage port

24: Common electrode voltage port

30: Temperature detection module

31: Temperature signal output port

100: Active matrix cholesterol liquid crystal display device

110: Display panel

111: Display unit

120: Gate drive element

121:Gateway communication port

122: Gate voltage input port

123: Common electrode voltage input port

130: Data driver

131: Data port

132: Data voltage input port

Iv: Voltage control command

Ig: Gate control instruction

Id: Image display command

Vg: Gate drive voltage

Vd: Data drive voltage

Vcom: common electrode voltage

DL: Data Line

GL: Gate line

T: Temperature signal

Claims (8)

A driving system of an active matrix cholesterol liquid crystal display device is used to control an active matrix cholesterol liquid crystal display device, wherein the active matrix cholesterol liquid crystal display device comprises a gate driving element, a data driving element, and a plurality of display units electrically connected to the gate driving element and the data driving element, respectively. The driving system of the active matrix cholesterol liquid crystal display device comprises: a timing controller connected to the active matrix cholesterol liquid crystal display device and controlling the display unit according to a static image parameter data, a data enabling signal, and a vertical synchronization signal. A power supply module is provided, which is connected to the timing controller and the active matrix cholesterol liquid crystal display device, generates a voltage control instruction, a gate control instruction and an image display instruction according to the voltage control instruction, outputs the gate control instruction to the gate drive element, and outputs the image display instruction to the data drive element, and controls the active matrix cholesterol liquid crystal display device to execute a static image display program; a power supply module is connected to the timing controller and the active matrix cholesterol liquid crystal display device, generates a gate drive voltage and a plurality of data drive voltages according to the voltage control instruction, outputs the gate drive voltage to the gate drive element, and outputs The plurality of data drive voltages are driven to the data drive element; wherein, in the static image display program, the timing controller controls the timing of the gate drive element to turn on or off the plurality of display units according to the gate control instruction; the gate drive element controls the opening or closing of the plurality of display units according to the gate drive voltage; the timing controller controls the data drive element to output the plurality of data drive voltages to the turned-on plurality of display units according to the image display instruction; the static image display program includes at least one positive display cycle and at least one negative display cycle. In the at least one positive display cycle, the data driving element outputs the plurality of data driving voltages of positive polarity, and in the at least one negative display cycle, the data driving element outputs the plurality of data driving voltages of negative polarity, the total duration of each positive display cycle is equal to the total duration of each negative display cycle, and the voltage average value of the plurality of data driving voltages of positive polarity in each positive display cycle is the same as the voltage average value of the plurality of data driving voltages of negative polarity in each negative display cycle. A driving system for an active matrix cholesterol liquid crystal display device as described in claim 1, wherein in the static image display process, the order of each positive polarity display cycle and each plurality of negative polarity display cycles is arbitrarily arranged. The driving system of the active matrix cholesterol liquid crystal display device as described in claim 1, wherein the timing controller controls the active matrix cholesterol liquid crystal display device to execute a screen reset procedure, and the power supply module generates a common electrode voltage according to the voltage control instruction; in the screen reset procedure, the timing controller controls the timing of the gate drive element to turn on or off the plurality of display units according to the gate control instruction; the gate drive element controls the opening or closing of the plurality of display units through the gate drive voltage, and outputs the common electrode voltage to the plurality of display units that are turned on; the screen reset procedure The sequence includes at least one positive reset cycle and at least one negative reset cycle. In the at least one positive reset cycle, the plurality of display units that are turned on receive the common electrode voltage of the negative polarity, and in the at least one negative reset cycle, the plurality of display units that are turned on receive the common electrode voltage of the positive polarity. The total duration of the at least one positive reset cycle is equal to the total duration of the at least one negative reset cycle, and the voltage value of the common electrode voltage of the negative polarity in the at least one positive reset cycle is the same as the voltage value of the common electrode voltage of the positive polarity in the at least one negative display cycle. The driving system of the active matrix cholesterol liquid crystal display device as described in claim 1 further comprises: a temperature sensing module connected to the timing controller and disposed in the active matrix cholesterol liquid crystal display device, sensing a device temperature of the active matrix cholesterol liquid crystal display device and generating a temperature signal according to the device temperature; wherein the timing controller adjusts the voltage control instruction according to the temperature signal and a preset temperature voltage table. The driving system of the active matrix cholesterol liquid crystal display device as described in claim 3 further comprises: a single chip device connected to the active matrix cholesterol liquid crystal display device, comprising: a processor, performing image processing on a static image data, generating the static image parameter data, the vertical synchronization signal and the data enable signal according to a voltage parameter corresponding to each pixel in the static image data; and a memory, connected to the processor, storing the static image parameter data, the vertical synchronization signal and the data enable signal. As described in claim 5, the driving system of the active matrix cholesterol liquid crystal display device, the processor adjusts the timing relationship between the static image parameter data, the vertical synchronization signal and the data enable signal according to a device characteristic data, and adjusts the duration of the screen reset process or the static image display process according to the timing relationship between the static image parameter data, the vertical synchronization signal and the data enable signal; or, the processor adjusts the voltage parameter corresponding to each pixel in the static image parameter data according to the device characteristic data; wherein the device characteristic data includes the related information of the driving time and driving voltage corresponding to different material characteristics. As described in claim 5, the driving system of the active matrix cholesterol liquid crystal display device, the processor includes a plurality of image parameter lookup tables and an image processing program, each image parameter lookup table corresponds to a different image format, the processor performs image processing on the static image data according to one of the image parameter lookup tables corresponding to the image format of the static image data using the image processing program, and generates the static image parameter data. In the driving system of the active matrix cholesterol liquid crystal display device as described in claim 5, the processor adjusts the timing relationship between the static image parameter data, the vertical synchronization signal and the data enable signal according to a user setting data and a display characteristic data, and adjusts the screen reset procedure or the static image according to the timing relationship between the static image parameter data, the vertical synchronization signal and the data enable signal. The duration of the image display process; or, the processor adjusts the voltage parameter corresponding to each pixel in the static image parameter data according to the user setting data and the display characteristic data; wherein the user setting data includes different display parameters set for the active matrix cholesterol liquid crystal display device, and the display characteristic data includes related information of the driving time and driving voltage corresponding to different display parameters.

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