Software sequential control cholesterol liquid crystal device
By combining a software timing controller and a power supply module, the high cost and low speed problems of traditional cholesteric LCD displays are solved, enabling faster screen updates.
Patent Information
- Application Number
- CN202411117286.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2026-03-03
AI Technical Summary
Traditional cholesteric liquid crystal displays require hardware timing controllers, resulting in high production costs, large size, and slow screen update speed.
A software timing controller is used instead of a hardware timing controller. The power supply module and the cholesteric LCD panel are controlled by a single chip system, which realizes the software setting of voltage amplitude, reduces the cost and space requirements of the hardware timing controller, and accelerates screen switching by setting the voltage amplitude at one time.
It saves on the cost of hardware timing controllers, reduces screen switching time, and improves the refresh rate of cholesteric LCD displays.
Smart Images
Figure CN121600871A_ABST
Abstract
Description
Technical Field
[0001] A cholesterol liquid crystal device, particularly a cholesterol liquid crystal device with software timing control. Background Technology
[0002] Currently, traditional Cholesteric Liquid Crystal Displays (ChLCDs) exhibit bistable liquid crystal display characteristics. Therefore, in the field of traditional ChLCD technology, a process of resetting the data displayed by each pixel is required between each frame. This pixel resetting process necessitates providing sufficient voltage across multiple pairs of pixel electrodes to rearrange the bistable liquid crystal to its original state before pixel data was displayed. Furthermore, regardless of whether an active-matrix Cholesteric Liquid Crystal Display (AMChLCD) or passive-matrix Cholesteric Liquid Crystal Display (PMChLCD) is used—that is, regardless of whether each pixel of a ChLCD has a thin-film transistor (TFT) to perform switching logic—each pixel of a ChLCD still requires a resetting process.
[0003] In order to perform a reset action and display image data, a conventional cholesteric liquid crystal display (LCD) relies on a processor, such as a single-chip system, to provide image data to a hardware timing controller. The hardware timing controller then uses the image data to determine the timing to set the supply voltage of a power supply. The power supply, after being set by the hardware timing controller, provides the voltage to the conventional cholesteric LCD to perform a reset or to display an image after a reset.
[0004] However, the problem is that this hardware timing controller has a certain size, and its design and manufacturing incur certain production costs. This hardware size and production cost create an unavoidable cost burden for manufacturers of cholesteric liquid crystal displays.
[0005] Furthermore, the traditional power supply used with conventional cholesteric LCD monitors requires repeated voltage setting via the hardware timing controller when performing reset or resetting image display operations. This voltage setting operation mode, which involves setting the voltage for each operation, is too time-consuming and cumbersome, thus lengthening the time it takes for conventional cholesteric LCD monitors to switch between displaying each image and limiting the speed at which conventional cholesteric LCD monitors update the displayed image.
[0006] Please see Figure 8A and Figure 8B As shown, Figure 8A and Figure 8B The vertical axis represents voltage, measured in volts (V), while the horizontal axis represents time, measured in milliseconds (ms). When a hardware timing controller wants to reset a traditional cholesteric LCD, it sends a series of instructions to the traditional power supply, such as... Figure 8A The first command signal V shown S1 This setting, which involves the traditional power supply modulating and supplying voltage, takes an initial setting time T. S1 When the conventional power supply receives the first command signal V S1 Then, it will be based on the first instruction signal V S1 The pulse train sequentially sets the output potential of each power supply output channel at different time points, and outputs these different potentials to a conventional cholesteric liquid crystal display (LCD). Then, the conventional cholesteric LCD, receiving these different potentials, further modulates the different voltages across the cholesteric liquid crystals using internal components, thereby generating a signal based on this potential difference. Figure 8B The reset voltage V shown R This reset voltage V R The generation of the output reset voltage took a time T. R .
[0007] Next, after resetting the conventional cholesteric LCD, the hardware timing controller sends another series of instructions to the conventional power supply, such as... Figure 8A The second command signal V shown S2 This is to display the desired image. The process of resetting the conventional power supply's modulation voltage and supply voltage takes a second setting time T. S2 When the conventional power supply receives the second command signal V S2 Then, according to the second command signal V S2At different time points in the pulse train, the output potentials of each power supply output channel are sequentially set, and these different potentials are output to the conventional cholesteric liquid crystal display. Then, the conventional cholesteric liquid crystal display, receiving different potentials, further modulates the different voltages across the cholesteric liquid crystals through internal components, thereby generating a voltage difference based on this voltage difference. Figure 8B The voltage V shown is D This output displays the voltage V. D The generation of the output display voltage took a time T. D .
[0008] Therefore, it is evident that traditional cholesteric liquid crystal displays require this initial setup time T whenever a new image needs to be displayed. S1 The output reset voltage time T R The second time setting T S2 And the output display voltage time T D The total number of hours. Excluding the output reset voltage time T, which is indispensable in the field of cholesteric liquid crystal displays. R And the output display voltage time T D Currently, it still requires the initial setup time T. S1 and the second set time T S2 Because of the two set times, the screen refresh rate of traditional cholesterol-based LCD monitors is relatively slow. Summary of the Invention
[0009] In view of the above problems, the present invention provides a cholesteric liquid crystal device with software timing control. A hardware timing controller is rendered in software and executed by a software timing controller on a single-chip system. This saves on the cost of designing and manufacturing the hardware timing controller and eliminates the need for the hardware space required to set up the hardware timing controller. Furthermore, the present invention improves the way the software timing controller and a power supply module drive the cholesteric liquid crystal device, enabling the cholesteric liquid crystal device to switch between displaying each frame more quickly, thereby saving the time required for switching between displaying each frame and increasing the speed of updating and displaying multiple frames.
[0010] The software-time-controlled cholesterol liquid crystal device of the present invention includes:
[0011] A cholesterol-based liquid crystal panel includes a scan driving element, a data driving element, and a plurality of pixel electrode pairs electrically connected between the scan driving element and the data driving element.
[0012] A power supply module is provided with a first channel, a second channel, a third channel and a fourth channel; wherein the first channel, the second channel and the fourth channel are electrically connected to the scan driving element of the cholesterol liquid crystal panel, and the first channel, the third channel and the fourth channel are electrically connected to the data driving element of the cholesterol liquid crystal panel.
[0013] A single-chip system includes a software timing controller, which is electrically connected to the power supply module and the scan driving element and the data driving element of the cholesteric liquid crystal panel, respectively.
[0014] The software timing controller sets and controls the power supply module to output a first voltage amplitude on the first channel, a second voltage amplitude on the second channel, a third voltage amplitude on the third channel, and a fourth voltage amplitude on the fourth channel, wherein the fourth voltage amplitude is greater than the third voltage amplitude, the third voltage amplitude is greater than the second voltage amplitude, and the second voltage amplitude is greater than the first voltage amplitude.
[0015] The software timing controller modulates a voltage setting command to the power supply module according to an image signal, so that the power supply module modulates a reset voltage required to reset the plurality of pixel electrode pairs of the cholesterol liquid crystal panel according to the voltage setting command and the first voltage amplitude to the fourth voltage amplitude, and modulates a display voltage required to display an image by the plurality of pixel electrode pairs.
[0016] Thus, the software-timed controlled cholesteric liquid crystal device only needs to set the power supply module to output the first voltage amplitude to the fourth voltage amplitude on the first to fourth channels once. Then, whenever a screen needs to be updated, the software timing control can directly modulate different voltage across the cholesteric liquid crystal panel according to the first to fourth voltage amplitudes to update the pixel electrode pairs, without adjusting the amplitude. Therefore, when it is necessary to update several pixels of the cholesteric liquid crystal panel, that is, to perform pixel reset and data display operations, the cholesteric liquid crystal panel only needs to update the different voltage across the pixel electrode pairs corresponding to those pixels once according to the voltage setting command issued by the software timing controller.
[0017] In contrast, traditional cholesteric liquid crystal displays require two instruction issuance times to display each frame: one instruction to modulate the voltage required to reset the frame, and another instruction to modulate the voltage required to display the data after the frame is reset. However, the cholesteric liquid crystal device with software timing control of this invention sets the voltage amplitude of the power supply module at the beginning. Therefore, it only requires one instruction issuance time to display each frame, that is, to update the pixel electrode pairs with the voltage setting instruction to reset the frame and display the data. Thus, this invention not only saves the cost of setting up a hardware timing controller, but also enables more flexible and efficient control of the power supply module and the cholesteric liquid crystal panel to update the pixels and display each frame using the software timing controller. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of a cholesterol liquid crystal device with software timing control according to the present invention.
[0019] Figure 2A This is a schematic diagram of the signal from which the software timing controller sends a voltage setting command to the cholesterol liquid crystal device of the present invention.
[0020] Figure 2B This is a schematic diagram of the trans-voltage signal received by the cholesterol liquid crystal in the cholesterol liquid crystal device controlled by the software timing according to the present invention.
[0021] Figure 2C This is a schematic diagram of the power supply module of the cholesterol liquid crystal device controlled by the software timing according to the present invention modulating a fourth low potential signal.
[0022] Figure 2D This is a schematic diagram of the power supply module of the cholesterol liquid crystal device controlled by the software timing according to the present invention modulating a third low potential signal.
[0023] Figure 2E This is a schematic diagram of a second low-potential signal modulated by the power supply module of the cholesterol liquid crystal device controlled by the software timing according to the present invention.
[0024] Figure 2F This is a schematic diagram of a first low-potential signal modulated by the power supply module of the cholesterol liquid crystal device controlled by the software timing according to the present invention.
[0025] Figure 2G This is a schematic diagram of a signal modulating a fourth high potential in the power supply module of the cholesterol liquid crystal device controlled by the software timing according to the present invention.
[0026] Figure 2HThis is a schematic diagram of a signal modulating a third high potential in the power supply module of the cholesterol liquid crystal device controlled by the software timing according to the present invention.
[0027] Figure 2I This is a schematic diagram of a signal modulating a second high potential in the power supply module of the cholesterol liquid crystal device controlled by the software timing according to the present invention.
[0028] Figure 2J This is a schematic diagram of a signal modulating a first high potential in the power supply module of the cholesterol liquid crystal device controlled by the software timing according to the present invention.
[0029] Figure 2K This is a schematic diagram of the signal of the modulation voltage of the data driving element in the cholesterol liquid crystal panel of the cholesterol liquid crystal device controlled by the software timing according to the present invention.
[0030] Figure 2L This is a schematic diagram of the signal of the modulation voltage of the scanning drive element in the cholesterol liquid crystal panel of the cholesterol liquid crystal device controlled by the software timing according to the present invention.
[0031] Figure 3 This is another schematic diagram of the cholesterol liquid crystal device controlled by the software timing according to the present invention.
[0032] Figure 4 This is a schematic diagram of signal generation in a single-chip system of the cholesterol liquid crystal device with software timing control according to the present invention in one embodiment.
[0033] Figure 5 This is a schematic diagram of signal generation in a single-chip system of the cholesterol liquid crystal device with software timing control according to the present invention in another embodiment.
[0034] Figure 6 This is a flowchart illustrating the screen update process of the cholesterol liquid crystal device controlled by the software timing according to the present invention in an embodiment.
[0035] Figure 7 This is another flowchart illustrating the screen update process of the cholesterol liquid crystal device controlled by the software timing according to the present invention in an embodiment.
[0036] Figure 8A This is a schematic diagram of a hardware timing controller sending instructions to a conventional power supply.
[0037] Figure 8B This is a schematic diagram of a traditional cholesterol liquid crystal display receiving voltage signals.
[0038] Explanation of graphic symbols:
[0039] 1: Single-chip system
[0040] 2: Power Supply Module
[0041] 3: Cholesterol LCD Panel
[0042] 4: Temperature detection module
[0043] 5: Signal conversion board
[0044] 10: Processing device
[0045] 11: Image Temporary Storage
[0046] 12: Software timing controller
[0047] 31: Scan driving element
[0048] 32: Data-driven components
[0049] 33: Pixel area
[0050] 41: First temperature communication port
[0051] 51: First conversion port
[0052] 52: Second conversion port
[0053] 53: Third conversion port
[0054] 54: Fourth conversion port
[0055] 100: Operating System
[0056] 101: Digital Photo Frame Software
[0057] 102: Electronic Signage Software
[0058] 103: Image Processing Program
[0059] 104: Image Parameter Lookup Table
[0060] 120: Power control port
[0061] 121: Scan control port
[0062] 122: Data Control Port
[0063] 123: Temperature communication port
[0064] 200: Power communication port
[0065] 201: First power port
[0066] 202: Second power port
[0067] 203: Third power port
[0068] 204: Fourth power port
[0069] 310: Scanning communication ports
[0070] 311, 312, 313: Scan power ports
[0071] 320: Data communication port
[0072] 321, 322, 323: Data and power ports
[0073] P1: First pulse
[0074] P2: Second pulse
[0075] P8: Eighth Pulse
[0076] V1: Voltage setting command
[0077] V D Display voltage
[0078] V DI : Display transpressure
[0079] V R Reset voltage
[0080] V RE Reset Transpressure
[0081] V S1 First command signal
[0082] V S2 Second command signal
[0083] S1~S7: Steps
[0084] T1: First set time
[0085] T D Output display voltage and time
[0086] T DI Screen display time
[0087] T R Output reset voltage time
[0088] T RE Reset Time
[0089] T S1 First time setting
[0090] T S2 Second time setting Detailed Implementation
[0091] Please see Figure 1As shown, the present invention provides a software-time-controlled cholesteric liquid crystal device. This software-time-controlled cholesteric liquid crystal device includes a single-chip system 1, a power supply module 2, and a cholesteric liquid crystal panel 3.
[0092] The cholesterol liquid crystal panel 3 includes a scan driving element 31, a data driving element 32, and a pixel region 33. The pixel region 33 contains a plurality of pixels, and each pixel corresponds to a plurality of pixel electrode pairs. Each pixel electrode pair is electrically connected between the scan driving element 31 and the data driving element 32. The cholesterol liquid crystal panel 3 of the present invention can be an active matrix or a passive matrix cholesterol liquid crystal.
[0093] Preferably, the scan driving element 31 has a scan communication port 310 and several scan power ports 311, 312, and 313. Furthermore, the data driving element 32 has a data communication port 320 and several data power ports 321, 322, and 323.
[0094] The power supply module 2 is provided with a power communication port 200, a first power port 201 electrically connected to a first channel, a second power port 202 electrically connected to a second channel, a third power port 203 electrically connected to a third channel, and a fourth power port 204 electrically connected to a fourth channel. The first, second, and fourth channels of the power supply module 2 are electrically connected to the scan driving element 31 of the cholesteric liquid crystal panel 3, and the first, third, and fourth channels are electrically connected to the data driving element 32 of the cholesteric liquid crystal panel 3.
[0095] Specifically, the first power port 201, which is electrically connected to the first channel, is further electrically connected to the scan power port 311 and the data power port 321, respectively. The second power port 202, which is electrically connected to the second channel, is further electrically connected to the scan power port 312. The third power port 203, which is electrically connected to the third channel, is further electrically connected to the data power port 322. The fourth power port 204, which is electrically connected to the fourth channel, is further electrically connected to the scan power port 313 and the data power port 323, respectively.
[0096] The single-chip system 1 includes a processing device 10, an image temporary storage memory 11, and a software timing controller 12. The processing device 10 is electrically connected to the image temporary storage memory 11, and the image temporary storage memory 11 is electrically connected to the software timing controller 12. The software timing controller 12 has a power control port 120, a scan control port 121, and a data control port 122. The power control port 120 is electrically connected to the power communication port 200 of the power supply module 2, the scan control port 121 is electrically connected to the scan communication port 310 of the cholesteric liquid crystal panel 3, and the data control port 122 is electrically connected to the data communication port 320 of the cholesteric liquid crystal panel 3.
[0097] Through communication between the power control port 120 and the power communication port 200, the software timing controller 12 of the single-chip system 1 sets and controls the power supply module 2 to output a first voltage amplitude through the first power port 201 in the first channel, a second voltage amplitude through the second power port 202 in the second channel, a third voltage amplitude through the third power port 203 in the third channel, and a fourth voltage amplitude through the fourth power port 204 in the fourth channel. The fourth voltage amplitude is greater than the third voltage amplitude, the third voltage amplitude is greater than the second voltage amplitude, and the second voltage amplitude is greater than the first voltage amplitude.
[0098] Furthermore, the software timing controller 12 modulates a voltage setting command and a data format command based on an image signal. The software timing controller 12 sends the data format command to the scan driving element 31 and the data driving element 32 of the cholesteric liquid crystal panel 3 via the scan control port 121 and the data control port 122, respectively, so that the cholesteric liquid crystal panel 3 sets the data format corresponding to a display screen according to the data format command. The software timing controller 12 sends the voltage setting command to the power communication port 200 of the power supply module 2 via the power control port 120, so that the power supply module 2, according to the voltage setting command and the first to fourth voltage amplitudes, first modulates a reset voltage required to reset the plurality of pixel electrode pairs of the cholesteric liquid crystal panel 3, and then directly modulates a display voltage required to display an image by the plurality of pixel electrode pairs. The modulation basis of the reset voltage and the display voltage is based on the absolute value of the voltage, which is the first voltage amplitude to the fourth voltage amplitude mentioned above. The modulated voltage is provided in a timely manner to each pixel electrode pair of the cholesteric liquid crystal panel 3 to generate the voltage required for updating the image.
[0099] The software timing controller 12 of this invention is executed by the single-chip system 1, thus eliminating the need for a hardware timing controller as in conventional technologies. In other words, since the processing power of the single-chip system 1 is generally more than sufficient, this invention utilizes the existing hardware of the single-chip system 1, such as an existing processing chip, and software-configures a portion of the processing chip's performance for use by the software timing controller 12 of this invention. Thus, this invention saves the cost of designing and manufacturing a separate hardware timing controller and eliminates the need for the hardware space required to set up such a hardware timing controller.
[0100] Furthermore, because the software timing controller 12 of this invention is designed by the software of the single-chip system 1, it can be utilized more flexibly and efficiently. Thus, this invention improves the way the software timing controller 12 and the power supply module 2 drive the cholesteric liquid crystal panel 3, enabling the cholesteric liquid crystal panel 3 to switch between displaying each image more quickly, thereby saving time in switching between displaying each image and increasing the speed of updating and displaying multiple images.
[0101] Please see Figure 2A and Figure 2B As shown, Figure 2A and Figure 2B The vertical axis represents voltage, measured in volts (V), while the horizontal axis represents time, measured in milliseconds (ms). When the software timing controller 12 wants to reset the screen displayed on the cholesterol liquid crystal panel 3 and wants to display a new screen, the software timing controller 12 modulates as follows: Figure 2A The diagram shows a voltage setting command V1, which is sent to the power communication port 200 of the power supply module 2 to inform the power supply module 2 of the required modulated voltage in one go. The voltage setting command V1 is a pulse train; according to the timing of each pulse in the pulse train, the required output voltage of the power supply module 2 from the first power port 201 to the fourth power port 204 is modulated. This setting of the modulated voltage of the power supply module 2 takes a first setting time T1.
[0102] Next, the scan driving element 31 and the data driving element 32 of the cholesterol liquid crystal panel 3 receive various voltage amplitudes output by the power supply module 2 to first generate a reset voltage V. RE Remanufacture a display trans-voltage V DI The cholesterol-based liquid crystal panel 3 receives the voltage output from the power supply module 2 to generate the reset voltage V. RE The required time is a reset time T. RE The cholesterol-based liquid crystal panel 3 receives the voltage output from the power supply module 2 to generate the display voltage V. DIThe required time is the display time T of one screen. DI .
[0103] Therefore, whenever it is necessary to reset the screen and display a new screen, the present invention only needs to consume the first set time T1 and the reset voltage V. RE and the time T displayed on the screen DI The total number of hours. Figure 8A and Figure 8B Compared to the time consumed by existing technologies, the present invention updates and displays each frame much faster. The power supply module 2 of the present invention only needs to modulate the voltage once according to the voltage setting command issued by the software timing controller 12, without having to wait twice for the conventional hardware timing controller to control the conventional power supply voltage modulation. Thus, the present invention uses the software timing controller 12 to more flexibly and efficiently control the power supply module and the cholesteric liquid crystal panel to update the voltage across the pixel electrode pairs to display each frame.
[0104] Regarding the modulation of the reset voltage and the display voltage, the software timing controller 12 of this invention only needs to control the modulation and output voltage amplitudes of the power supply module 2 once. For details, please refer to Table 1 below:
[0105]
[0106] Table 1
[0107] Preferably, the first power port 201 to the fourth power port 204 of the power supply module 2 can each output a high potential or a low potential through two different sub-channels. The first high potential and the first low potential have the same amplitude, that is, the first voltage amplitude. The second high potential and the second low potential have the same amplitude, that is, the second voltage amplitude, and so on. Preferably, the high potential is a positive voltage, and the low potential is a negative voltage. For example, the first high potential is a positive voltage, the first low potential is a negative voltage, the second high potential is also a positive voltage, the second low potential is also a negative voltage, and so on.
[0108] For example, in one embodiment of the present invention, each pixel electrode pair of the cholesteric liquid crystal panel 3 is used to display a monochrome pixel, so the cholesteric liquid crystal panel 3 can only display a monochrome image. In this embodiment, the first high potential is +6 volts (V), the first low potential is -6V, the second high potential is +11V, the second low potential is -11V, the third high potential is +16V, the third low potential is -16V, the fourth high potential is +25V, and the fourth low potential is -25V. Based on this, please further refer to Table 2:
[0109]
[0110]
[0111] Table 2
[0112] The liquid crystal voltage shown in Table 2 above is the voltage received by the scan driving element 31 minus the voltage received by the data driving element 32. The so-called black level voltage for same color display refers to the voltage required to update the display of the same color (black), while the so-called white level voltage for same color display refers to the voltage required to update the display of the same color (white).
[0113] When the power supply module 2 resets the plurality of pixel electrode pairs by periodically modulating the voltage according to the voltage setting command, the scan driving element 31 uses the fourth high potential provided by the power supply module 2, and the data driving element 32 uses the fourth low potential provided by the power supply module 2, so that each pixel electrode pair between the data driving element 32 and the scan driving element 31 has a positive periodic reset voltage. According to Table 2 above, the positive periodic reset voltage is 25V - (-25V) = 50V.
[0114] When the power supply module 2 resets the plurality of pixel electrode pairs by periodically modulating the voltage according to the voltage setting command, the scan driving element 31 uses the fourth low potential provided by the power supply module 2, and the data driving element 32 uses the fourth high potential provided by the power supply module 2, so that each pixel electrode pair between the data driving element 32 and the scan driving element 31 has a negative periodic reset voltage. According to Table 2 above, the negative periodic reset voltage is -25V - (+25V) = -50V.
[0115] When the power supply module 2 updates the pixel electrode pairs to display black levels by periodically modulating the voltage according to the voltage setting command, the scan driving element 31 uses the first high potential provided by the power supply module 2, and the data driving element 32 uses the third low potential provided by the power supply module 2, so that each pixel electrode pair corresponding to the display of black levels between the data driving element 32 and the scan driving element 31 has a positive periodic black level voltage. According to Table 2 above, the positive periodic black level voltage is +6V-(-16V)=22V.
[0116] When the power supply module 2 updates the pixel electrode pairs to display black levels according to the voltage setting command by periodically modulating the voltage on the negative polarity, the scan driving element 31 uses the first low potential provided by the power supply module 2, and the data driving element 32 uses the third high potential provided by the power supply module 2, so that each pixel electrode pair corresponding to the display of black levels between the data driving element 32 and the scan driving element 31 has a negative periodic black level voltage. According to Table 2 above, the negative periodic black level voltage is -6V-(+16V)=-22V.
[0117] When the power supply module 2 updates the pixel electrode pairs to display white levels according to the voltage setting command by adjusting the positive polarity periodic voltage, the scan driving element 31 uses the first high potential provided by the power supply module 2, and the data driving element 32 uses the first low potential provided by the power supply module 2, so that each pixel electrode pair corresponding to the white level display between the data driving element 32 and the scan driving element 31 has a positive periodic white level voltage. According to Table 2 above, the positive periodic white level voltage is +6V-(-6V)=12V.
[0118] When the power supply module 2 updates the pixel electrode pairs to display white levels according to the voltage setting command by periodically modulating the voltage on the negative polarity, the scan driving element 31 uses the first low potential provided by the power supply module 2, and the data driving element 32 uses the first high potential provided by the power supply module 2, so that each pixel electrode pair corresponding to the white level display between the data driving element 32 and the scan driving element 31 has a negative periodic white level voltage. According to Table 2 above, the negative periodic white level voltage is -6V-(+6V)=-12V.
[0119] When the power supply module 2 controls the plurality of pixel electrodes to maintain the display black level during updates by modulating the positive polarity periodic voltage according to the voltage setting command, the scan driving element 31 uses the second low potential provided by the power supply module 2, and the data driving element 32 uses the third low potential provided by the power supply module 2, so that each pixel electrode pair between the data driving element 32 and the scan driving element 31 that maintains the display black level has a positive periodic black level maintenance voltage. According to Table 2 above, the positive periodic black level maintenance voltage is -11V - (-16V) = 5V.
[0120] When the power supply module 2 modulates the negative polarity periodic voltage according to the voltage setting command to control the plurality of pixel electrodes to maintain the display black level during updates, the scan driving element 31 uses the second high potential provided by the power supply module 2, and the data driving element 32 uses the third high potential provided by the power supply module 2, so that each pixel electrode pair between the data driving element 32 and the scan driving element 31 that maintains the display black level has a negative periodic black level maintenance voltage. According to Table 2 above, the negative periodic black level maintenance voltage is +11V-(+16V)=-5V.
[0121] When the power supply module 2 controls the pixel electrodes to maintain the white level during updates by modulating the positive polarity periodic voltage according to the voltage setting command, the scan driving element 31 uses the second low potential provided by the power supply module 2, and the data driving element 32 uses the first low potential provided by the power supply module 2, so that each pair of pixel electrodes corresponding to maintaining the white level between the data driving element 32 and the scan driving element 31 has a positive periodic white level maintenance voltage. According to Table 2 above, the positive periodic white level maintenance voltage is -11V - (-6V) = -5V.
[0122] When the power supply module 2 controls the pixel electrodes to maintain the white level during updates by modulating the negative polarity periodic voltage according to the voltage setting command, the scan driving element 31 uses the second high potential provided by the power supply module 2, and the data driving element 32 uses the first high potential provided by the power supply module 2, so that each pixel electrode pair that maintains the white level between the data driving element 32 and the scan driving element 31 has a negative periodic white level maintenance voltage. According to Table 2 above, the negative periodic white level maintenance voltage is +11V - (+6V) = 5V.
[0123] As mentioned above, in this embodiment, each power port has two voltage output sub-channels, so the first power port 201 to the fourth power port 204 of the power supply module 2 have a total of 8 voltage output sub-channels. Figure 2A The voltage setting command V1 includes a total of 8 pulses, such as the first pulse P1 (timing first), the second pulse P2 (timing second), and the last pulse P8 (timing last). Based on the timing sequence of each pulse in the voltage setting command V1, Figure 2A The voltage setting command V1 uses a pulse to set the potential output by a voltage output sub-channel.
[0124] Please refer to the following: Figures 2C to 2J As shown, where:
[0125] Figure 2COne of the sub-channels of the fourth power port 204 is set from 0V to the fourth low potential of -25V according to the voltage modulation voltage of the first pulse P1 in the voltage setting instruction V1.
[0126] Figure 2D One of the sub-channels of the third power port 203 is set from 0V to the third low potential of -16V according to the voltage modulation voltage of the second pulse P2 in the voltage setting instruction V1.
[0127] Figure 2E One of the sub-channels of the second power port 202 is set from 0V to the second low potential of -11V according to the third pulse modulation voltage in the voltage setting instruction V1.
[0128] Figure 2F One of the sub-channels of the first power port 201 is set from 0V to a first low potential of -6V according to the fourth pulse modulation voltage in the voltage setting instruction V1.
[0129] Figure 2G The other subchannel of the fourth power port 204 is set from 0V to the fourth high potential of +25V according to the fifth pulse modulation voltage in the voltage setting instruction V1.
[0130] Figure 2H The other subchannel of the third power port 203 is set from 0V to the third high potential of +16V according to the sixth pulse modulation voltage in the voltage setting instruction V1.
[0131] Figure 2I The other subchannel of the second power port 202 is set from 0V to the second high potential of +11V according to the seventh pulse modulation voltage in the voltage setting instruction V1.
[0132] Figure 2J The other subchannel of the first power port 201 is set from 0V to the first high potential of +6V according to the eighth pulse P8 modulation voltage in the voltage setting instruction V1.
[0133] like Figures 2C to 2J As shown, the power supply module 2 spends the first set time T1 to output the 8 potentials set for the 8 voltage output sub-channels.
[0134] Please see Figure 2K , Figure 2L and Figure 2B As shown, the power supply module 2 outputs 8 potentials. Figure 2K This presents the voltage modulated by the data driving element 32. Figure 2LThe voltage modulated by the scan driving element 31 is presented, and the difference between the voltage modulated by the scan driving element 31 and the voltage modulated by the data driving element 32 is equal to the voltage modulated by the scan driving element 31. Figure 2B The voltage difference shown. Figure 2B The voltage difference shown includes the aforementioned reset voltage V. RE And the display trans-pressure V DI The calculation method for this voltage difference has already been explained in the section explaining Table 2, so it will not be repeated here.
[0135] In another embodiment, the plurality of pixel electrode pairs of the cholesterol liquid crystal panel 3 are used to display a plurality of blue pixels and a plurality of red pixels, that is, the cholesterol liquid crystal panel 3 is a blue-red dual-color liquid crystal panel.
[0136] Thus, the first voltage amplitude set for the aforementioned power supply module 2 includes a blue first high potential and a blue first low potential, the second voltage amplitude includes a blue second high potential and a blue second low potential, the third voltage amplitude includes a blue third high potential and a blue third low potential, and the fourth voltage amplitude includes a blue fourth high potential and a blue fourth low potential.
[0137] In addition to the aforementioned four channels, the power supply module 2 also has a first red channel, a second red channel, a third red channel, and a fourth red channel, and each channel has a corresponding port for output to the cholesteric liquid crystal panel 3. The first red channel, the second red channel, and the fourth red channel are electrically connected to the scan driving element 31 of the cholesteric liquid crystal panel 3, and the first red channel, the third red channel, and the fourth red channel are electrically connected to the data driving element 32 of the cholesteric liquid crystal panel 3.
[0138] The software timing controller 12 simultaneously sets and controls the power supply module 2 to output a first high and a first low red potential on the first red channel, a second high and a second low red potential on the second red channel, a third high and a third low red potential on the third red channel, and a fourth high and a fourth low red potential on the fourth red channel. Furthermore, the software timing controller 12 uses the voltage setting command to control the power supply module 2 to modulate the voltage so that the cholesteric liquid crystal panel 3 resets the plurality of blue pixels according to the fourth high and the fourth low blue potential, and resets the plurality of red pixels according to the fourth high and the fourth low red potential. In the field of cholesteric liquid crystal display technology, the method of the power supply module 2 modulating the voltage to reset the cholesteric liquid crystal panel 3 and the method of displaying a blue-red image with interlaced blue and red pixels are similar to the method of the power supply module 2 modulating the voltage to reset the cholesteric liquid crystal panel 3 and the method of displaying a monochrome image, and therefore will not be elaborated upon here.
[0139] In another embodiment, the plurality of pixel electrode pairs of the cholesterol liquid crystal panel 3 are used to display a plurality of blue pixels, a plurality of green pixels and a plurality of red pixels, that is, the cholesterol liquid crystal panel 3 is a color display liquid crystal panel.
[0140] Thus, the power supply module also has a green first channel, a green second channel, a green third channel, and a green fourth channel. The green first channel, the green second channel, and the green fourth channel are electrically connected to the scan driving element 31 of the cholesteric liquid crystal panel 3, and the green first channel, the green third channel, and the green fourth channel are electrically connected to the data driving element 32 of the cholesteric liquid crystal panel 3.
[0141] The software timing controller 12 sets and controls the power supply module 2 to output a first high green voltage and a first low green voltage on the first green channel, a second high green voltage and a second low green voltage on the second green channel, a third high green voltage and a third low green voltage on the third green channel, and a fourth high green voltage and a fourth low green voltage on the fourth green channel. Furthermore, the software timing controller 12 uses the voltage setting command to control the power supply module 2 to modulate the voltage so that the cholesteric liquid crystal panel 3 resets the plurality of blue pixels according to the fourth high blue voltage and the fourth low blue voltage, resets the plurality of red pixels according to the fourth high red voltage and the fourth low red voltage, and resets the plurality of green pixels according to the fourth high green voltage and the fourth low green voltage. In the field of cholesteric liquid crystal display technology, the method by which the power supply module 2 modulates the voltage to reset the image of the cholesteric liquid crystal panel 3 and the method by which it displays an RGB color image interwoven with blue, red, and green pixels are the same as the method by which the power supply module 2 modulates the voltage to reset the monochrome image of the cholesteric liquid crystal panel 3 and the method by which it displays a monochrome image, so they will not be described in detail here.
[0142] like Figure 1 As shown, in one embodiment, the scan control port 121 and the data control port 122 of the software timing controller 12 are electrically connected via a Low Voltage Transistor-Transistor Logic (LVTTL) interface to the scan communication port 310 of the scan driving element 31 and the data communication port 320 of the data driving element 32 of the cholesterol liquid crystal panel 3, so as to transmit the data format instruction from the software timing controller 12 to the scan driving element 31 and the data driving element 32 of the cholesterol liquid crystal panel 3.
[0143] Furthermore, the software timing controller 12 communicates with the power supply module 2 via an Inter-Integrated Circuit (I2C) bus to set and control the power supply module 2.
[0144] Please see Figure 3 As shown, in one embodiment, the present invention further includes a temperature detection module 4 and a signal conversion board 5.
[0145] Because cholesteric liquid crystal is a temperature-sensitive material, the software timing controller 12 has a temperature communication port 123, which is electrically connected to a first temperature communication port 41 of the temperature detection module 4. The temperature detection module 4 is connected to the cholesteric liquid crystal panel 3, for example, and is disposed on a circuit board inside the cholesteric liquid crystal panel 3. The temperature detection module 4 detects a temperature of the cholesteric liquid crystal panel 3 and generates a temperature signal, which is then sent to the software timing controller 12. The software timing controller 12 adjusts the amplitude of the first voltage amplitude, the second voltage amplitude, the third voltage amplitude, and the fourth voltage amplitude output by the power supply module 2 according to the temperature signal. Thus, when the software timing controller 12 controls the power supply module 2 to modulate the voltage to be supplied to the cholesteric liquid crystal panel 3, the magnitude of the voltage is also adjusted according to the temperature signal.
[0146] In addition, the signal conversion board 5 has a first conversion port 51, a second conversion port 52, a third conversion port 53, and a fourth conversion port 54. The first conversion port 51 is electrically connected to the scan control port 121 of the software timing controller 12, the second conversion port 52 is electrically connected to the data control port 122 of the software timing controller 12, the third conversion port 53 is electrically connected to the scan communication port 310 of the cholesterol liquid crystal panel 31, and the fourth conversion port 54 is electrically connected to the data communication port 320 of the data driving element 32.
[0147] The software timing controller 12 first outputs LVTTL signals to the first conversion port 51 and the second conversion port 52 of the signal conversion board 5 through the scan control port 121 and the data control port 122, respectively. Then, the signal conversion board 5 converts the LVTTL signals into Mini Low-Voltage Differential Signaling (Mini-LVDS) signals, and the Mini-LVDS signals are output to the scan communication port 310 and the data communication port 320 of the cholesteric liquid crystal panel 3 through the third conversion port 53 and the fourth conversion port 54, respectively. Thus, the scan control port 121 of the software timing controller 12 is indirectly electrically connected to the scan communication port 310 of the cholesteric liquid crystal panel 3 through the signal conversion board 5, and the data control port 122 of the software timing controller 12 is indirectly electrically connected to the data communication port 320 of the cholesteric liquid crystal panel 3 through the signal conversion board 5.
[0148] In one embodiment, the signal conversion board 5 is a field programmable gate array (FPGA) signal conversion board to convert the LVTTL signal into the low voltage differential signal via the FPGA for output to the cholesterol liquid crystal panel 3.
[0149] In another embodiment, the signal conversion board 5 is a signal conversion board of a Complex Programmable Logic Device (CPLD) to convert the LVTTL signal into the low voltage differential signal via the CPLD for output to the cholesterol liquid crystal panel 3.
[0150] Please see Figure 4 As shown, in one embodiment, the processing device 10 within the single-chip system 1 executes an operating system 100, which stores several image software programs, an image processing program 103, and several image parameter lookup tables 104. The several image software programs may include, for example, a digital photo frame software 101 and an electronic signage software 102, and the operating system 100 is a Linux / Android operating system.
[0151] The image processing program 103 in the operating system 100 receives an image from the image software, such as a frame image from the digital frame software 101 or an electronic sign image from the electronic signage software 102. The frame image and the electronic sign image are different types of images, and different types of images correspond to different types of image parameter lookup tables 104.
[0152] The image processing program 103 can generate image data according to one of the image parameter lookup tables 104 corresponding to the image format, and output the image data to the image temporary storage memory 11. Then, the image temporary storage memory 11 outputs the image signal corresponding to the image data to the software timing controller 12. The software timing controller 12 then formulates the voltage setting command to be sent to the power supply module 2 and the data format command to be sent to the cholesteric liquid crystal panel 3 based on the image signal.
[0153] Please see Figure 5As shown, in another embodiment, the operating system 100 only contains the aforementioned image software, such as a digital photo frame software 101 and an electronic signage software 102. The image processing program 103 and the various image parameter lookup tables 104 are stored in the software timing controller 12. Thus, the image temporary storage 11 receives the image from the image software and then outputs the corresponding image signal to the image processing program 103 stored in the software timing controller 12. The image signal originating from the digital photo frame software 101 and the image signal originating from the electronic signage software 102 have different image formats, and these different image formats correspond to different types of image parameter lookup tables 104.
[0154] The image processing program 103 of the software timing controller 12 modulates the voltage setting command and the data format command according to the image format of the image signal and according to one of the image parameter lookup tables 104 corresponding to the image format.
[0155] Please see Figure 6 and Figure 7 As shown, preferably, in order to update each image displayed by the cholesteric liquid crystal panel 3 with the best quality, the present invention implements the following steps in one embodiment:
[0156] Step S1: An image update command is issued by an image software, such as the aforementioned digital photo frame software 101 or electronic signage software 102, within the processing device 10 of the single-chip system 1, of the operating system 100. The image update command defines a display direction and a display mode for the updated image.
[0157] Step S2: The operating system 100 pauses all operations of the image software and transfers the control of updating the screen to the software timing controller 12 within the single-chip system 1.
[0158] Step S3: After gaining master control, the software timing controller 12 obtains the temperature data of the cholesterol liquid crystal panel 3 from the temperature detection module 4 through the integrated circuit bus (I2C), that is, obtains a panel temperature based on the temperature signal obtained from the temperature detection module 4.
[0159] Step S4: Based on the panel temperature, the software timing controller 12 reads a voltage-to-temperature setting table and sets the voltage potential that the power supply module 2 needs to modulate, reads a display timing-to-temperature setting table and sets the timing required to update the screen, and reads a drive waveform-to-temperature setting table and sets the drive waveform required to update the screen.
[0160] Step S5: The software timing controller 12 transmits the voltage setting command to the power supply module 2 via the integrated circuit bus (I2C).
[0161] Step S6: The software timing controller 12 transmits display data to the scan driver element 31 and the data driver element 32 of the cholesteric liquid crystal panel 3 via a low-voltage transistor logic interface (LVTTL) to perform screen reset and screen display during screen update. This step corresponds to the aforementioned technical content whereby the software timing controller 12 transmits the data format instruction to the scan driver element 31 and the data driver element 32 of the cholesteric liquid crystal panel 3, causing the cholesteric liquid crystal panel 3 to set the data format corresponding to the displayed screen according to the data format instruction, and further resets the screen and displays the data for a new screen.
[0162] Step S7: When the screen display is complete, the software timing controller 12 returns control to the operating system 100 and reports the display completion status information to the image software within the operating system 100. The image software can then schedule the update and display of the next screen.
[0163] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.
Claims
1. A software-time-controlled cholesteric liquid crystal device, characterized in that, The software-time-controlled cholesterol liquid crystal device includes: A cholesterol-based liquid crystal panel includes a scan driving element, a data driving element, and a plurality of pixel electrode pairs electrically connected between the scan driving element and the data driving element. A power supply module is provided with a first channel, a second channel, a third channel and a fourth channel; wherein the first channel, the second channel and the fourth channel are electrically connected to the scan driving element of the cholesterol liquid crystal panel, and the first channel, the third channel and the fourth channel are electrically connected to the data driving element of the cholesterol liquid crystal panel. A single-chip system includes a software timing controller, which is electrically connected to the power supply module and the scan driving element and the data driving element of the cholesteric liquid crystal panel, respectively. The software timing controller sets and controls the power supply module to output a first voltage amplitude on the first channel, a second voltage amplitude on the second channel, a third voltage amplitude on the third channel, and a fourth voltage amplitude on the fourth channel, wherein the fourth voltage amplitude is greater than the third voltage amplitude, the third voltage amplitude is greater than the second voltage amplitude, and the second voltage amplitude is greater than the first voltage amplitude. The software timing controller modulates a voltage setting command to the power supply module according to an image signal, so that the power supply module modulates a reset voltage required to reset the plurality of pixel electrode pairs of the cholesterol liquid crystal panel according to the voltage setting command and the first voltage amplitude to the fourth voltage amplitude, and modulates a display voltage required to display an image by the plurality of pixel electrode pairs.
2. The software-time-controlled cholesteric liquid crystal device as described in claim 1, characterized in that, The fourth voltage amplitude output by the fourth channel includes a fourth high potential and a fourth low potential; When the power supply module modulates the voltage in a positive polarity cycle to reset the plurality of pixel electrode pairs according to the voltage setting command, the power supply module provides the fourth high potential to the scan driving element and provides the fourth low potential to the data driving element, so that there is a positive periodic reset voltage between the data driving element and the scan driving element. When the power supply module modulates the voltage in a negative polarity cycle to reset the plurality of pixel electrode pairs according to the voltage setting command, the power supply module provides the fourth low potential to the scan driving element and provides the fourth high potential to the data driving element, so that there is a negative periodic reset voltage between the data driving element and the scan driving element.
3. The software-time-controlled cholesteric liquid crystal device as described in claim 1, characterized in that, Each pixel electrode pair in this cholesterol-based liquid crystal panel is used to display a monochrome pixel; The first voltage amplitude output by the first channel includes a first high potential and a first low potential, and the third voltage amplitude output by the third channel includes a third high potential and a third low potential. When the power supply module modulates the voltage in a positive polarity cycle to update the several pixel electrode pairs to display black levels according to the voltage setting command, the power supply module provides the first high potential to the scan driving element and provides the third low potential to the data driving element, so that there is a positive periodic black level cross voltage between the data driving element and the scan driving element. When the power supply module modulates the voltage in the positive polarity period according to the voltage setting command to update the several pixel electrode pairs to display white levels, the power supply module provides the first high potential to the scan driving element and provides the first low potential to the data driving element, so that there is a positive periodic white level voltage between the data driving element and the scan driving element. When the power supply module modulates the voltage in a negative polarity cycle to update the several pixel electrode pairs to display black levels according to the voltage setting command, the power supply module provides the first low potential to the scan driving element and provides the third high potential to the data driving element, so that there is a negative period black level cross voltage between the data driving element and the scan driving element. When the power supply module modulates the voltage in the negative polarity period according to the voltage setting command to update the several pixel electrode pairs to display white levels, the power supply module provides the first low potential to the scan driving element and provides the first high potential to the data driving element, so that there is a negative period white level cross voltage between the data driving element and the scan driving element.
4. The software-time-controlled cholesteric liquid crystal device as described in claim 3, characterized in that, The second voltage amplitude output by the second channel includes a second high potential and a second low potential; When the power supply module modulates the voltage in the positive polarity period according to the voltage setting command to control the several pixel electrode pairs to maintain the display black level, the power supply module provides the second low potential to the scan driving element and provides the third low potential to the data driving element, so that there is a positive periodic black level maintenance voltage between the data driving element and the scan driving element. When the power supply module modulates the voltage in the positive polarity period according to the voltage setting command to control the several pixel electrode pairs to maintain the display white level, the power supply module provides the second low potential to the scan driving element and provides the first low potential to the data driving element, so that there is a positive period white level maintenance voltage between the data driving element and the scan driving element. When the power supply module modulates the voltage in the negative polarity period according to the voltage setting command to control the several pixel electrode pairs to maintain the display black level, the power supply module provides the second high potential to the scan driving element and provides the third high potential to the data driving element, so that there is a negative period black level maintenance voltage between the data driving element and the scan driving element. Specifically, when the power supply module modulates the voltage in the negative polarity period according to the voltage setting command to control the several pixel electrode pairs to maintain the display white level, the power supply module provides the second high potential to the scan driving element and provides the first high potential to the data driving element, so that there is a negative period white level maintenance voltage between the data driving element and the scan driving element.
5. The software-time-controlled cholesteric liquid crystal device as described in claim 1, characterized in that, The pixel electrode pairs of this cholesterol-based liquid crystal panel are used to display several blue pixels and several red pixels; The first voltage amplitude includes a blue first high potential and a blue first low potential; the second voltage amplitude includes a blue second high potential and a blue second low potential; the third voltage amplitude includes a blue third high potential and a blue third low potential; and the fourth voltage amplitude includes a blue fourth high potential and a blue fourth low potential. The power supply module further includes a first red channel, a second red channel, a third red channel, and a fourth red channel; the first red channel, the second red channel, and the fourth red channel are electrically connected to the scan driving element of the cholesterol liquid crystal panel, and the first red channel, the third red channel, and the fourth red channel are electrically connected to the data driving element of the cholesterol liquid crystal panel. The software timing controller sets and controls the power supply module to output a red first high potential and a red first low potential on the red first channel, a red second high potential and a red second low potential on the red second channel, a red third high potential and a red third low potential on the red third channel, and a red fourth high potential and a red fourth low potential on the red fourth channel. The software timing controller uses the voltage setting command to control the power supply module to modulate the voltage required for the cholesterol liquid crystal panel to reset the number of blue pixels according to the fourth high potential and the fourth low potential of blue, and to reset the number of red pixels according to the fourth high potential and the fourth low potential of red.
6. The software-time-controlled cholesteric liquid crystal device as described in claim 1, characterized in that, The pixel electrode pairs of this cholesterol liquid crystal panel are used to display several blue pixels, several green pixels, and several red pixels; The first voltage amplitude includes a blue first high potential and a blue first low potential; the second voltage amplitude includes a blue second high potential and a blue second low potential; the third voltage amplitude includes a blue third high potential and a blue third low potential; and the fourth voltage amplitude includes a blue fourth high potential and a blue fourth low potential. The power supply module further includes a first red channel, a second red channel, a third red channel, a fourth red channel, a first green channel, a second green channel, a third green channel, and a fourth green channel; wherein the first red channel, the second red channel, the fourth red channel, the first green channel, the second green channel, and the fourth green channel are electrically connected to the scanning driving element of the cholesterol liquid crystal panel, and the first red channel, the third red channel, the fourth red channel, the first green channel, the third green channel, and the fourth green channel are electrically connected to the data driving element of the cholesterol liquid crystal panel. The software timing controller sets and controls the power supply module to output a red first high potential and a red first low potential on the red first channel, a red second high potential and a red second low potential on the red second channel, a red third high potential and a red third low potential on the red third channel, a red fourth high potential and a red fourth low potential on the red fourth channel, a green first high potential and a green first low potential on the green first channel, a green second high potential and a green second low potential on the green second channel, a green third high potential and a green third low potential on the green third channel, and a green fourth high potential and a green fourth low potential on the green fourth channel. Specifically, the software timing controller uses the voltage setting command to control the power supply module to modulate the voltage required for the cholesterol liquid crystal panel to reset the number of blue pixels according to the fourth high potential and the fourth low potential of blue, to reset the number of red pixels according to the fourth high potential and the fourth low potential of red, and to reset the number of green pixels according to the fourth high potential and the fourth low potential of green.
7. The software-time-controlled cholesteric liquid crystal device as described in claim 1, characterized in that, The software-time-controlled cholesterol liquid crystal device further includes: A temperature detection module is connected to the cholesterol LCD panel and electrically connected to the software timing controller; The temperature detection module detects the temperature of the cholesterol liquid crystal panel and generates a temperature signal, and sends the temperature signal to the software timing controller. The software timing controller adjusts and controls the amplitude of the first voltage amplitude, the second voltage amplitude, the third voltage amplitude, and the fourth voltage amplitude output by the power supply module based on the temperature signal.
8. The software-time-controlled cholesteric liquid crystal device as described in claim 1, characterized in that, The single-chip system also has an operating system and an image temporary storage memory, and the operating system has an image software, an image processing program and several image parameter lookup tables; The image processing program receives an image from the image software, generates image data in the image temporary storage memory according to a lookup table of several image parameters corresponding to the image, and then outputs the image signal corresponding to the image data to the software timing controller.
9. The software-time-controlled cholesteric liquid crystal device as described in claim 1, characterized in that, The single-chip system also has an operating system and an image temporary storage memory, and the operating system has image software; The software timing controller includes an image processing program and several image parameter lookup tables. The image temporary storage memory receives an image from the image software, and then outputs the image signal corresponding to the image to the image processing program of the software timing controller. The software timing controller's image processing program modulates the voltage setting command according to an image format of the image signal and a lookup table of several image parameters corresponding to that image format.
10. The cholesteric liquid crystal device with software timing control as described in claim 8 or 9, characterized in that, The operating system is Linux / Android, and the imaging software is either a digital photo frame software or an electronic signage software.
11. The cholesteric liquid crystal device with software timing control as described in any one of claims 1 to 9, characterized in that, The software timing controller communicates with the power supply module via an integrated circuit bus to set and control the power supply module.
12. The cholesteric liquid crystal device with software timing control as described in any one of claims 1 to 9, characterized in that, The software timing controller is electrically connected to the scan drive element and the data drive element of the cholesterol liquid crystal panel through a low-voltage transistor logic interface.
13. The cholesteric liquid crystal device with software timing control as described in any one of claims 1 to 9, characterized in that, The software timing controller first connects to a signal conversion board via a low-voltage transistor logic interface, and then indirectly connects to the scan driving element and the data driving element of the cholesterol liquid crystal panel via the signal conversion board in order to output a low-voltage differential signal.
14. The cholesteric liquid crystal device with software timing control as described in claim 1, characterized in that, The software-time-controlled cholesterol liquid crystal device further includes: A temperature detection module is connected to the cholesterol liquid crystal panel and electrically connected to the software timing controller; wherein the temperature detection module detects a temperature of the cholesterol liquid crystal panel and generates a temperature signal, and sends the temperature signal to the software timing controller. The single-chip system also includes an operating system, and the operating system includes imaging software. The software-time-controlled cholesteric liquid crystal device updates each image displayed on the cholesteric liquid crystal panel by performing the following steps: The imaging software of the operating system issues a screen update command; wherein the screen update command is defined by the imaging software as a display direction and a display mode of the updated screen; The operating system pauses all operations of the imaging software and transfers control of updating the screen to the software timing controller within the single-chip system. After acquiring the master control, the software timing controller obtains the temperature signal from the temperature detection module through an integrated circuit bus to obtain a panel temperature. Based on the panel temperature, the software timing controller reads a voltage-to-temperature setting table and looks up the table to set the voltage potential that the power supply module needs to modulate, reads a display timing-to-temperature setting table and looks up the table to set the timing required to update the screen, and reads a drive waveform-to-temperature setting table and looks up the table to set the drive waveform required to update the screen. The software timing controller transmits the voltage setting command to the power supply module via an integrated circuit bus; The software timing controller transmits display data to the scan driving element and the data driving element of the cholesterol liquid crystal panel through a low-voltage transistor logic interface, so as to perform screen reset and screen display when updating the screen; When the display is complete, the software timing controller returns control to the operating system and reports the display completion status information to the imaging software in the operating system.