Liquid crystal display screen display control method and system

Abstract

The present invention relates to the field of liquid crystal screen control, and specifically to a liquid crystal display screen display control method and system, comprising: a screen grid module, a signal transcoding module, a liquid crystal test module, an electrode control module and an electric field scanning module, wherein the screen grid module is used to grid a backlight panel and a liquid crystal panel, the signal transcoding module is used to receive a dual-channel display signal and adjust the backlight light, the liquid crystal test module is used to calculate an average director of the liquid crystal grid, the electrode control module is used to control the opening and closing of the electric field in the grid and fit the actual polarized light, and the electric field scanning module is used to perform color calibration on the display screen. The present invention can perform fine color adjustment on various parts of the liquid crystal screen, achieve a wider color range and higher contrast, present a more realistic image effect, enhance the user's visual experience, and at the same time increase the service life of the display screen, thereby ensuring the reliability and durability of the display screen.

Description

Technical Field

[0001] The present invention relates to the field of liquid crystal screen control, and in particular to a liquid crystal display screen display control method and system. Background Art

[0002] Liquid crystal display is a common electronic display technology that displays images through liquid crystal materials. It is usually composed of many tiny liquid crystal units, each of which can control the light transmittance to display images. Since the LCD screen itself does not emit light, it needs to be used in combination with a backlight panel to realize the display function of the picture.

[0003] The backlight panel of the LCD screen generates backlight at a constant brightness during operation. The color display and the brightness adjustment of the picture are all responsible for the liquid crystal layer. The electric field scanning device of the liquid crystal layer is required to constantly change the control electric field in the LCD screen. Not only can it easily cause fatigue of the liquid crystal layer and reduce the life of the display, but the frequently changed scanning electric field will also reduce the refresh rate of the display, which is prone to afterimage or ghosting, affecting the user's viewing experience.

[0004] In addition, since the liquid crystal perfusion process during LCD screen production is prone to problems such as over-perfusion and uneven perfusion, the polarization parameters of the liquid crystal in different parts of the LCD screen are different, causing noise and color differences in different parts of the screen during the image display process, which reduces the display quality of the screen to a certain extent and affects the overall display effect of the display. Summary of the invention

[0005] The object of the present invention is to provide a liquid crystal display screen display control method and system to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a liquid crystal display screen display control system, comprising: a screen grid module, a signal transcoding module, a liquid crystal test module, an electrode control module and an electric field scanning module;

[0007] The screen grid module is used to grid the backlight panel and the liquid crystal panel respectively, and evenly divide the screen area in a matrix manner. The display parameters in each grid constitute a pixel matrix, and the screen division process meets the screen gridding conditions. The gridding conditions are: the side length of the grid in the backlight panel is equal to or an integer multiple of the side length of the grid in the liquid crystal panel, and the side length of a single grid is greater than the distance between pixels. A variable capacitor is added in each grid of the backlight panel, and the variable capacitors of each grid are connected by a logic chip;

[0008] The signal transcoding module is used to receive the display signal from the signal source when the display screen is powered on, analyze the brightness and color data in the dual-channel display signal, convert them into digital signals according to the conversion protocol, transmit the brightness signal to the logic chip of the backlight panel, process the brightness signal according to the preset rules, obtain the control sequence of the size of each grid capacitance, so that the adjusted grid generates backlight light consistent with the brightness signal under voltage excitation;

[0009] The liquid crystal test module is used to scan the liquid crystal layer using electric fields of different sizes to obtain the wavelength of light in each grid of the liquid crystal panel under the same backlight source, calculate the average director of the liquid crystal layer in each grid of the liquid crystal panel based on the wavelength of light and the intensity of the scanning electric field, and calculate the polarization rate of each grid to the light based on the average director;

[0010] The electrode control module is used to connect a thin film transistor in the grid of the liquid crystal panel, and the thin film transistor is used to control the opening and closing of the electric field in the grid, and the frequency of the actual polarized light is calculated according to the light intensity and light frequency at the corresponding backlight panel position, and the actual polarized light is compared with the color signal. If they are consistent, it is converted into a high-level digital signal, otherwise it is converted into a low-level digital signal;

[0011] The electric field scanning module is used to scan the liquid crystal panel with a constant electric field, control the opening and closing state of the electric field switch according to the digital signal level of each grid, calculate the color calibration duration according to the scanning electric field strength, and maintain the switch state until the light frequency displayed in the grid is consistent with the color signal of the signal source.

[0012] Furthermore, the screen grid module includes: a backlight unit, a liquid crystal grid unit and a logic chip unit;

[0013] The backlight panel unit is used to provide a stable backlight illumination source for the liquid crystal display screen and control the brightness of the displayed image;

[0014] The liquid crystal grid unit is used to grid the backlight panel and the liquid crystal panel of the liquid crystal display screen, so as to keep the screen division process satisfying the screen gridding conditions and form an independent control unit;

[0015] The logic chip unit is used to connect the capacitors of each grid of the backlight panel and adjust the capacitance value in each grid according to the input digital signal.

[0016] Further, the signal transcoding module includes: a signal access unit and a brightness scanning unit;

[0017] The signal access unit is used to receive analog signals or digital signals from the signal source and convert them into brightness signals and color signals according to the signal conversion protocol;

[0018] The brightness scanning unit is used to input the brightness signal into the logic chip of the backlight panel, and adjust the capacitance value of each backlight grid so that the adjusted grid generates backlight light consistent with the brightness signal under voltage excitation.

[0019] Further, the liquid crystal test module includes: a test electrode unit and a crystalline state recording unit;

[0020] The test electrode unit is used to excite the electrode to generate an electric field, and when the electric field scans the liquid crystal layer, the backlight source is turned on to illuminate the liquid crystal panel;

[0021] The crystalline recording unit is used to record the polarization intensity of the light source before and after it passes through the liquid crystal grid, and calculate the average director of the liquid crystal layer.

[0022] Further, the electrode control module includes: an electrode switch unit and a polarization control unit;

[0023] The electrode switch unit is used to control the opening and closing of the electrode switches in each grid of the liquid crystal panel through a thin film transistor;

[0024] The polarization control unit is used to compare the actual polarized light with the color signal and output an opening and closing control signal according to the comparison result.

[0025] Further, the electric field scanning module includes: a scanner unit, a switch control unit and a grid color adjustment unit;

[0026] The scanner unit is used to scan the liquid crystal panel using a deflection electric field, adjust the average director of the liquid crystal layer in the grid, thereby controlling the deflection rate of the light, and calculate the average director of the liquid crystal layer in each grid;

[0027] The switch control unit is used to control the time when the liquid crystal grid contacts the deflection electric field by opening and closing the electrode switch;

[0028] The grid color adjustment unit is used to adjust the color of the backlight source of the liquid crystal grid to be consistent with the color signal of the signal source.

[0029] A liquid crystal display screen display control method comprises the following steps:

[0030] Step S1. Divide the LCD screen area, grid the backlight panel and the LCD panel, install variable capacitors in the backlight panel grid, connect the capacitors through a logic chip, connect thin-film transistors in the LCD panel grid, and connect them to the switch of the deflection electric field;

[0031] Step S2. After the display screen is powered on, it receives a dual-channel display signal from a signal source, converts the display signal into a brightness signal and a color signal represented in a digital signal format according to a signal conversion protocol, and inputs the brightness signal into a logic chip;

[0032] Step S3. The logic chip processes the brightness signal, adjusts the grid capacitance according to the brightness of each grid, so that the adjusted grid generates a backlight consistent with the brightness signal under a fixed voltage, illuminates the liquid crystal panel with the backlight, and records the wavelength of the light before and after the backlight passes through each liquid crystal grid;

[0033] Step S4. Compare the wavelength of the light behind the grid with the color signal, output an opening and closing signal according to the comparison result, use a fixed electric field to scan the liquid crystal layer, and calculate the average director of the liquid crystal grid in the grid with inconsistent comparison results according to the liquid crystal polarization principle based on the electric field strength and the polarization frequency of the backlight;

[0034] Step S5. Turn on the switch of the deflection electric field in the grid, connect the deflection electric field in the grid, and adjust the average director of the liquid crystal grid to be consistent with the director corresponding to the color signal by controlling the connection time of the deflection electric field.

[0035] Further, step S1 includes:

[0036] Step S11. According to the length and width specifications of the backlight panel and the liquid crystal panel of the display screen, the screen areas of the backlight panel and the liquid crystal panel are divided into square grids respectively under the condition that the screen gridding condition is met. The gridding condition is that the side length of the grid in the backlight panel is equal to or an integer multiple of the side length of the grid in the liquid crystal panel, and the side length of a single grid in the backlight panel or the liquid crystal panel is greater than the distance between pixels;

[0037] Step S12. Place a logic chip in each backlight panel grid, wherein the logic chip can adjust the capacitance value in each grid according to the input digital signal, including: a CMOS logic chip, a TTL logic chip, an ACT logic chip and an independently programmable logic chip;

[0038] Step S13. Connect a thin film transistor in the grid of the liquid crystal panel, wherein the thin film transistor can adjust the driving voltage of the output electrode through the digital signal input by the control electrode, and connect the thin film transistor to the switch of the deflection electric field in the grid.

[0039] Further, step S2 includes:

[0040] Step S21. The display screen receives a dual-channel signal from a signal source, wherein the dual-channel signal includes an analog signal and a digital signal and can provide brightness and color information of a display screen, and converts the dual-channel signal into a brightness signal and a color signal according to a signal conversion protocol;

[0041] Step S22. Digitize the brightness signal, calculate the average brightness of the corresponding position of each backlight panel grid, and output it in the form of a sequence, recorded as sequence A, A = [A1, A2, ..., Am], where m is the number of grids in the backlight panel and Am is the average brightness in the mth grid.

[0042] Further, step S3 includes:

[0043] Step S31. Input sequence A into the logic chip, which performs logic operations according to the capacitance in the grid, the operating voltage of the backlight panel and the LED hardware parameters, and adjusts the variable capacitance in each grid so that the adjusted grid brightness is equal to the average brightness of the grid position in the brightness signal;

[0044] Step S32. Set a color sensor to calibrate the liquid crystal layer, detect the display color of the pixels in each grid, obtain the wavelength and frequency deviation of the transmitted light at each pixel point according to the comparison relationship between color and light wavelength, record the average value of the wavelength of the transmitted light of all pixels in each liquid crystal panel grid, and output it to the logic chip as the grid's transmittance wavelength.

[0045] Further, step S4 includes:

[0046] Step S41. The set display color of each pixel is obtained from the color signal provided by the signal source, and the average value of the wavelength of light corresponding to the set display color of each pixel in the liquid crystal grid is output to the logic chip as the set wavelength of the grid;

[0047] Step S42. The logic chip determines in turn whether each liquid crystal grid meets a consistent condition. If the consistent condition is met, a high-level signal is output to the thin-film transistor control electrode connected to the grid. If the consistent condition is not met, a low-level signal is output to the thin-film transistor control electrode connected to the grid. The consistent condition is: |Pc-Pe|≤e, where Pc and Pe represent the light transmission wavelength and the set wavelength of the grid, respectively, and e is a preset color difference calibration value;

[0048] Step S43. When the thin film transistor receives a high level signal, it disconnects the switch of the deflection electric field in the grid, and when it receives a low level signal, it connects the switch of the deflection electric field in the grid;

[0049] Step S44: Use a scanning electric field of a fixed magnitude to apply an electric field to the entire liquid crystal panel, and calculate the average director of the liquid crystal layer in the liquid crystal grid according to the liquid crystal polarization principle. The liquid crystal polarization principle is:

[0050]

[0051] in, is the average director of the liquid crystal layer, k is the dielectric constant in vacuum, ε is the electrical polarizability of the liquid crystal material, is the electric field strength of the scanning electric field, It is the vector obtained by deflecting the polarization vector of the backlight source clockwise by ω1-ω2, where ω1 and ω2 represent the frequency deflection angles of the backlight light and the liquid crystal panel display light, respectively.

[0052] Further, step S5 includes:

[0053] Step S51. Turn on the switch of the deflection electric field in the liquid crystal screen, adjust the direction of all liquid crystal grids connected to the deflection electric field, and calculate the access time of the deflection electric field in the liquid crystal grid according to the following method:

[0054]

[0055] Where T represents the access time of the deflection electric field, The vector obtained by deflecting the polarization vector of the backlight source clockwise by ω1-ω3, where ω3 represents the frequency deflection angle of the display light in the color signal. is the electric field strength of the deflection electric field, u is the electric deviation coefficient of the liquid crystal;

[0056] Step S53: After all liquid crystal grids have completed deflection, the color calibration process of the liquid crystal layer ends, and the display screen is controlled to display an image.

[0057] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0058] 1. The present invention divides the pixel matrix in the backlight panel and the liquid crystal screen, adds variable capacitors in the pixel matrix, and connects them with a logic chip. When the display screen is powered on, the brightness and color dual-channel data are analyzed respectively, and the brightness signal is transmitted to the logic chip of the backlight panel, so as to control the light intensity at different positions of the backlight panel, so that the liquid crystal display screen can work together, and the service life of the display screen can be improved. At the same time, the display screen can present clearer images and enhance the user's visual experience.

[0059] 2. The present invention can test the color difference of different areas of the LCD screen under the same backlight source, calculate the director of the liquid crystal in each pixel matrix grid, and obtain the actual polarization angle of the liquid crystal grid in combination with the brightness signal of the backlight panel, and perform fine color adjustment on each part of the LCD screen to achieve a wider color range and higher contrast, presenting a more realistic image effect.

[0060] 3. The present invention uses a constant electric field to scan the liquid crystal layer and controls the electrode switches of each pixel matrix grid of the liquid crystal layer, so as to adjust the opening and closing time of the switch so that the backlight after the liquid crystal layer is deflected is consistent with the color signal, thereby avoiding the problem of low refresh rate caused by the changing electric field, improving the display effect and function of the liquid crystal display, and ensuring the reliability and durability of the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0062] Figure 1It is a structural schematic diagram of a liquid crystal display screen display control system of the present invention;

[0063] Figure 2 It is a schematic diagram of the steps of a liquid crystal display screen display control method of the present invention. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] See also Figure 1 ,The present invention provides a technical solution: a liquid crystal display screen display control system, including: a screen grid module, a signal transcoding module, a liquid crystal test module, an electrode control module and an electric field scanning module;

[0066] The screen grid module is used to grid the backlight panel and the liquid crystal panel respectively, and evenly divide the screen area in a matrix manner. The display parameters in each grid constitute a pixel matrix, and the screen division process meets the screen gridding conditions. The gridding conditions are: the side length of the grid in the backlight panel is equal to or an integer multiple of the side length of the grid in the liquid crystal panel, and the side length of a single grid is greater than the distance between pixels. A variable capacitor is added in each grid of the backlight panel, and the variable capacitors of each grid are connected by a logic chip;

[0067] The screen grid module includes: a backlight unit, a liquid crystal grid unit and a logic chip unit;

[0068] The backlight panel unit is used to provide a stable backlight illumination source for the liquid crystal display screen and control the brightness of the displayed image;

[0069] The liquid crystal grid unit is used to grid the backlight panel and the liquid crystal panel of the liquid crystal display screen, so as to keep the screen division process satisfying the screen gridding conditions and form an independent control unit;

[0070] The logic chip unit is used to connect the capacitors of each grid of the backlight panel and adjust the capacitance value in each grid according to the input digital signal.

[0071] The signal transcoding module is used to receive the display signal from the signal source when the display screen is powered on, analyze the brightness and color data in the dual-channel display signal, convert them into digital signals according to the conversion protocol, transmit the brightness signal to the logic chip of the backlight panel, process the brightness signal according to the preset rules, obtain the control sequence of the size of each grid capacitance, so that the adjusted grid generates backlight light consistent with the brightness signal under voltage excitation;

[0072] The signal transcoding module includes: a signal access unit and a brightness scanning unit;

[0073] The signal access unit is used to receive analog signals or digital signals from the signal source and convert them into brightness signals and color signals according to the signal conversion protocol;

[0074] The brightness scanning unit is used to input the brightness signal into the logic chip of the backlight panel, and adjust the capacitance value of each backlight grid so that the adjusted grid generates backlight light consistent with the brightness signal under voltage excitation.

[0075] The liquid crystal test module is used to scan the liquid crystal layer using electric fields of different sizes to obtain the wavelength of light in each grid of the liquid crystal panel under the same backlight source, calculate the average director of the liquid crystal layer in each grid of the liquid crystal panel based on the wavelength of light and the intensity of the scanning electric field, and calculate the polarization rate of each grid to the light based on the average director;

[0076] The liquid crystal test module comprises: a test electrode unit and a crystalline state recording unit;

[0077] The test electrode unit is used to excite the electrode to generate an electric field, and when the electric field scans the liquid crystal layer, the backlight source is turned on to illuminate the liquid crystal panel;

[0078] The crystalline recording unit is used to record the polarization intensity of the light source before and after it passes through the liquid crystal grid, and calculate the average director of the liquid crystal layer.

[0079] The electrode control module is used to connect a thin film transistor in the grid of the liquid crystal panel, and the thin film transistor is used to control the opening and closing of the electric field in the grid, and the frequency of the actual polarized light is calculated according to the light intensity and light frequency at the corresponding backlight panel position, and the actual polarized light is compared with the color signal. If they are consistent, it is converted into a high-level digital signal, otherwise it is converted into a low-level digital signal;

[0080] The electrode control module includes: an electrode switch unit and a polarization control unit;

[0081] The electrode switch unit is used to control the opening and closing of the electrode switches in each grid of the liquid crystal panel through a thin film transistor;

[0082] The polarization control unit is used to compare the actual polarized light with the color signal and output an opening and closing control signal according to the comparison result.

[0083] The electric field scanning module is used to scan the liquid crystal panel with a constant electric field, control the opening and closing state of the electric field switch according to the digital signal level of each grid, calculate the color calibration duration according to the scanning electric field strength, and maintain the switch state until the light frequency displayed in the grid is consistent with the color signal of the signal source.

[0084] The electric field scanning module includes: a scanner unit, a switch control unit and a grid color adjustment unit;

[0085] The scanner unit is used to scan the liquid crystal panel using a deflection electric field, adjust the average director of the liquid crystal layer in the grid, thereby controlling the deflection rate of the light, and calculate the average director of the liquid crystal layer in each grid;

[0086] The switch control unit is used to control the time when the liquid crystal grid contacts the deflection electric field by opening and closing the electrode switch;

[0087] The grid color adjustment unit is used to adjust the color of the backlight source of the liquid crystal grid to be consistent with the color signal of the signal source.

[0088] like Figure 2 As shown, a liquid crystal display screen display control method comprises the following steps:

[0089] Step S1. Divide the LCD screen area, grid the backlight panel and the LCD panel, install variable capacitors in the backlight panel grid, connect the capacitors through a logic chip, connect thin-film transistors in the LCD panel grid, and connect them to the switch of the deflection electric field;

[0090] Step S1 includes:

[0091] Step S11. According to the length and width specifications of the backlight panel and the liquid crystal panel of the display screen, the screen areas of the backlight panel and the liquid crystal panel are divided into square grids respectively under the condition that the screen gridding condition is met. The gridding condition is that the side length of the grid in the backlight panel is equal to or an integer multiple of the side length of the grid in the liquid crystal panel, and the side length of a single grid in the backlight panel or the liquid crystal panel is greater than the distance between pixels;

[0092] Step S12. Place a logic chip in each backlight panel grid, wherein the logic chip can adjust the capacitance value in each grid according to the input digital signal, including: a CMOS logic chip, a TTL logic chip, an ACT logic chip and an independently programmable logic chip;

[0093] Step S13. Connect a thin film transistor in the grid of the liquid crystal panel, wherein the thin film transistor can adjust the driving voltage of the output electrode through the digital signal input by the control electrode, and connect the thin film transistor to the switch of the deflection electric field in the grid.

[0094] Step S2. After the display screen is powered on, it receives a dual-channel display signal from a signal source, converts the display signal into a brightness signal and a color signal represented in a digital signal format according to a signal conversion protocol, and inputs the brightness signal into a logic chip;

[0095] Step S2 includes:

[0096] Step S21. The display screen receives a dual-channel signal from a signal source, wherein the dual-channel signal includes an analog signal and a digital signal and can provide brightness and color information of a display screen, and converts the dual-channel signal into a brightness signal and a color signal according to a signal conversion protocol;

[0097] Step S22. Digitize the brightness signal, calculate the average brightness of the corresponding position of each backlight panel grid, and output it in the form of a sequence, recorded as sequence A, A = [A1, A2, ..., Am], where m is the number of grids in the backlight panel and Am is the average brightness in the mth grid.

[0098] Step S3. The logic chip processes the brightness signal, adjusts the grid capacitance according to the brightness of each grid, so that the adjusted grid generates a backlight consistent with the brightness signal under a fixed voltage, illuminates the liquid crystal panel with the backlight, and records the wavelength of the light before and after the backlight passes through each liquid crystal grid;

[0099] Step S3 includes:

[0100] Step S31. Input sequence A into the logic chip, which performs logic operations according to the capacitance in the grid, the operating voltage of the backlight panel and the LED hardware parameters, and adjusts the variable capacitance in each grid so that the adjusted grid brightness is equal to the average brightness of the grid position in the brightness signal;

[0101] Step S32. Set a color sensor to calibrate the liquid crystal layer, detect the display color of the pixels in each grid, obtain the wavelength and frequency deviation of the transmitted light at each pixel point according to the comparison relationship between color and light wavelength, record the average value of the wavelength of the transmitted light of all pixels in each liquid crystal panel grid, and output it to the logic chip as the grid's transmittance wavelength.

[0102] Step S4. Compare the wavelength of the light behind the grid with the color signal, output an opening and closing signal according to the comparison result, use a fixed electric field to scan the liquid crystal layer, and calculate the average director of the liquid crystal grid in the grid with inconsistent comparison results according to the liquid crystal polarization principle based on the electric field strength and the polarization frequency of the backlight;

[0103] Step S4 includes:

[0104] Step S41. The set display color of each pixel is obtained from the color signal provided by the signal source, and the average value of the wavelength of light corresponding to the set display color of each pixel in the liquid crystal grid is output to the logic chip as the set wavelength of the grid;

[0105] Step S42. The logic chip determines in turn whether each liquid crystal grid meets a consistent condition. If the consistent condition is met, a high-level signal is output to the thin-film transistor control electrode connected to the grid. If the consistent condition is not met, a low-level signal is output to the thin-film transistor control electrode connected to the grid. The consistent condition is: |Pc-Pe|≤e, where Pc and Pe represent the light transmission wavelength and the set wavelength of the grid, respectively, and e is a preset color difference calibration value;

[0106] Step S43. When the thin film transistor receives a high level signal, it disconnects the switch of the deflection electric field in the grid, and when it receives a low level signal, it connects the switch of the deflection electric field in the grid;

[0107] Step S44: Use a scanning electric field of a fixed magnitude to apply an electric field to the entire liquid crystal panel, and calculate the average director of the liquid crystal layer in the liquid crystal grid according to the liquid crystal polarization principle. The liquid crystal polarization principle is:

[0108]

[0109] in, is the average director of the liquid crystal layer, k is the dielectric constant in vacuum, ε is the electrical polarizability of the liquid crystal material, is the electric field strength of the scanning electric field, It is the vector obtained by deflecting the polarization vector of the backlight source clockwise by ω1-ω2, where ω1 and ω2 represent the frequency deflection angles of the backlight light and the liquid crystal panel display light, respectively.

[0110] Step S5. Turn on the switch of the deflection electric field in the grid, connect the deflection electric field in the grid, and adjust the average director of the liquid crystal grid to be consistent with the director corresponding to the color signal by controlling the connection time of the deflection electric field.

[0111] Step S5 includes:

[0112] Step S51. Turn on the switch of the deflection electric field in the liquid crystal screen, adjust the direction of all liquid crystal grids connected to the deflection electric field, and calculate the access time of the deflection electric field in the liquid crystal grid according to the following method:

[0113]

[0114] Where T represents the access time of the deflection electric field, The vector obtained by deflecting the polarization vector of the backlight source clockwise by ω1-ω3, where ω3 represents the frequency deflection angle of the display light in the color signal. is the electric field strength of the deflection electric field, u is the electric deviation coefficient of the liquid crystal;

[0115] Step S53: After all liquid crystal grids have completed deflection, the color calibration process of the liquid crystal layer ends, and the display screen is controlled to display an image.

[0116] Embodiment: The backlight panel and the liquid crystal panel are divided into 100 grids, each grid corresponds to each other, the brightness signal of the signal source for grid 1 is 10cd, and the color signal is a light frequency of 440THz. Even if the brightness of the backlight panel grid 1 is 10cd, the light frequency of the backlight panel is 450THz, and the display light frequency of the liquid crystal layer is 445THz, the offset angle of the liquid crystal is calculated to be 0.15°, and the deflection electric field in the vertical direction is activated to make the liquid crystal layer shift 0.15° in the opposite direction to calibrate the color difference.

[0117] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0118] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liquid crystal display screen display control method, characterized in that: The method comprises the following steps: Step S1. Divide the LCD screen area, grid the backlight panel and the LCD panel, install variable capacitors in each grid of the backlight panel, connect the capacitors through a logic chip, connect thin-film transistors in the LCD panel grids, and connect them to the switch of the deflection electric field; Step S2. After the display screen is powered on, it receives a dual-channel display signal from a signal source, converts the display signal into a brightness signal and a color signal represented in a digital signal format according to a signal conversion protocol, and inputs the brightness signal into a logic chip; Step S3. The logic chip processes the brightness signal, adjusts the grid capacitance according to the brightness of each grid, so that the adjusted grid generates a backlight consistent with the brightness signal under a fixed voltage, illuminates the liquid crystal panel with the backlight, and records the wavelength of the light before and after the backlight passes through each liquid crystal grid; Step S4. Compare the wavelength of the light behind the grid with the color signal, output an opening and closing signal according to the comparison result, use a fixed electric field to scan the liquid crystal layer, and calculate the average director of the liquid crystal grid in the grid with inconsistent comparison results according to the liquid crystal polarization principle based on the electric field strength and the polarization frequency of the backlight; Step S5. Turn on the switch of the deflection electric field in the grid, connect the deflection electric field in the grid, and adjust the average director of the liquid crystal grid to be consistent with the director corresponding to the color signal by controlling the connection time of the deflection electric field; Step S1 includes: Step S11. According to the length and width specifications of the backlight panel and the liquid crystal panel of the display screen, the screen areas of the backlight panel and the liquid crystal panel are divided into square grids respectively under the condition that the screen gridding condition is met. The gridding condition is that the side length of the grid in the backlight panel is equal to or an integer multiple of the side length of the grid in the liquid crystal panel, and the side length of a single grid in the backlight panel and the liquid crystal panel is greater than the distance between pixels; Step S12. Place a logic chip in each backlight panel grid, wherein the logic chip can adjust the capacitance value in each grid according to the input digital signal, including: a CMOS logic chip, a TTL logic chip, an ACT logic chip and an independently programmable logic chip; Step S13. Connect a thin film transistor in the grid of the liquid crystal panel, wherein the thin film transistor can adjust the driving voltage of the output electrode through the digital signal input by the control electrode, and connect the thin film transistor to the switch of the deflection electric field in the grid.

2. A liquid crystal display screen display control method according to claim 1, characterized in that: Step S2 includes: Step S21. The display screen receives a dual-channel signal from a signal source, wherein the dual-channel signal includes an analog signal and a digital signal and can provide brightness and color information of a display screen, and converts the dual-channel signal into a brightness signal and a color signal according to a signal conversion protocol; Step S22. Digitize the brightness signal, calculate the average brightness of the corresponding position of each backlight grid, and output it in the form of a sequence, recorded as sequence A, A=[A1,A2,…,Am], where m is the number of grids in the backlight panel, and Am is the average brightness in the mth grid; Step S3 includes: Step S31. Input sequence A into the logic chip, which performs logic operations according to the capacitance in the grid, the operating voltage of the backlight panel and the LED hardware parameters, and adjusts the variable capacitance in each grid so that the adjusted grid brightness is equal to the average brightness of the grid position in the brightness signal; Step S32. Set a color sensor to calibrate the liquid crystal layer, detect the display color of the pixels in each grid, obtain the wavelength and frequency deviation of the transmitted light at each pixel point according to the comparison relationship between color and light wavelength, record the average value of the wavelength of the transmitted light of all pixels in each liquid crystal panel grid, and output it to the logic chip as the grid's transmittance wavelength.

3. A method for controlling a liquid crystal display screen according to claim 2, characterized in that: Step S4 includes: Step S41. The set display color of each pixel is obtained from the color signal provided by the signal source, and the average value of the wavelength of light corresponding to the set display color of each pixel in the liquid crystal grid is output to the logic chip as the set wavelength of the grid; Step S42. The logic chip determines in turn whether each liquid crystal grid meets a consistent condition. If the consistent condition is met, a high-level signal is output to the thin-film transistor control electrode connected to the grid. If the consistent condition is not met, a low-level signal is output to the thin-film transistor control electrode connected to the grid. The consistent condition is: |Pc-Pe|≤e, where Pc and Pe represent the light transmission wavelength and the set wavelength of the grid, respectively, and e is a preset color difference calibration value; Step S43. When the thin film transistor receives a high level signal, it disconnects the switch of the deflection electric field in the grid, and when it receives a low level signal, it connects the switch of the deflection electric field in the grid; Step S44: Use a scanning electric field of a fixed magnitude to apply an electric field to the entire liquid crystal panel, and calculate the average director of the liquid crystal layer in the liquid crystal grid according to the liquid crystal polarization principle. The liquid crystal polarization principle is: ； in, is the average director of the liquid crystal layer, k is the dielectric constant in vacuum, ε is the electrical polarizability of the liquid crystal material, is the electric field strength of the scanning electric field, It is the vector obtained by deflecting the polarization vector of the backlight source clockwise by ω1-ω2, where ω1 and ω2 represent the frequency deflection angles of the backlight light and the liquid crystal panel display light, respectively.

4. A method for controlling a liquid crystal display screen according to claim 3, characterized in that: Step S5 includes: Step S51. Turn on the switch of the deflection electric field in the liquid crystal screen, adjust the direction of all liquid crystal grids connected to the deflection electric field, and calculate the access time of the deflection electric field in the liquid crystal grid according to the following method: ； Where T represents the access time of the deflection electric field, The vector obtained by deflecting the polarization vector of the backlight source clockwise by ω1-ω3, where ω3 represents the frequency deflection angle of the display light in the color signal. is the electric field strength of the deflection electric field, u is the electric deviation coefficient of the liquid crystal; Step S53: After all liquid crystal grids have completed deflection, the color calibration process of the liquid crystal layer ends, and the display screen is controlled to display an image.

5. A liquid crystal display screen display control system, characterized in that: The system includes the following modules: a screen grid module, a signal transcoding module, a liquid crystal testing module, an electrode control module and an electric field scanning module; The screen grid module is used to grid the backlight panel and the liquid crystal panel respectively, and evenly divide the screen area in a matrix manner. The display parameters in each grid constitute a pixel matrix, and the screen division process meets the screen gridding conditions. The gridding conditions are: the side length of the grid in the backlight panel is equal to or an integer multiple of the side length of the grid in the liquid crystal panel, and the side length of a single grid is greater than the distance between pixels. A variable capacitor is added in each grid of the backlight panel, and the variable capacitors of each grid are connected by a logic chip; The signal transcoding module is used to receive the display signal from the signal source when the display screen is powered on, analyze the brightness and color data in the dual-channel display signal, convert them into digital signals according to the conversion protocol, transmit the brightness signal to the logic chip of the backlight panel, process the brightness signal according to the preset rules, obtain the control sequence of the size of each grid capacitance, so that the adjusted grid generates backlight light consistent with the brightness signal under voltage excitation; The liquid crystal test module is used to scan the liquid crystal layer using electric fields of different sizes to obtain the wavelength of light in each grid of the liquid crystal panel under the same backlight source, calculate the average director of the liquid crystal layer in each grid of the liquid crystal panel based on the wavelength of light and the intensity of the scanning electric field, and calculate the polarization rate of each grid to the light based on the average director; The electrode control module is used to connect a thin film transistor in the grid of the liquid crystal panel, and the thin film transistor is used to control the opening and closing of the electric field in the grid, and the frequency of the actual polarized light is calculated according to the light intensity and light frequency at the corresponding backlight panel position, and the actual polarized light is compared with the color signal. If they are consistent, it is converted into a high-level digital signal, otherwise it is converted into a low-level digital signal; The electric field scanning module is used to scan the liquid crystal panel with a constant electric field, control the opening and closing state of the electric field switch according to the digital signal level of each grid, calculate the color calibration duration according to the scanning electric field strength, and maintain the switch state until the light frequency displayed in the grid is consistent with the color signal of the signal source.

6. A liquid crystal display screen display control system according to claim 5, characterized in that: The screen grid module includes: a backlight unit, a liquid crystal grid unit and a logic chip unit; The backlight panel unit is used to provide a stable backlight illumination source for the liquid crystal display screen and control the brightness of the displayed image; The liquid crystal grid unit is used to grid the backlight panel and the liquid crystal panel of the liquid crystal display screen, so as to keep the screen division process satisfying the screen gridding conditions and form an independent control unit; The logic chip unit is used to connect the capacitors of each grid of the backlight panel and adjust the capacitance value in each grid according to the input digital signal.

7. A liquid crystal display screen display control system according to claim 6, characterized in that: The signal transcoding module includes: a signal access unit and a brightness scanning unit; The signal access unit is used to receive analog signals or digital signals from the signal source and convert them into brightness signals and color signals according to the signal conversion protocol; The brightness scanning unit is used to input the brightness signal into the logic chip of the backlight panel, and adjust the capacitance value of each backlight grid so that the adjusted grid generates backlight light consistent with the brightness signal under voltage excitation; The liquid crystal test module comprises: a test electrode unit and a crystalline state recording unit; The test electrode unit is used to excite the electrode to generate an electric field, and when the electric field scans the liquid crystal layer, the backlight source is turned on to illuminate the liquid crystal panel; The crystalline recording unit is used to record the polarization intensity of the light source before and after it passes through the liquid crystal grid, and calculate the average director of the liquid crystal layer.

8. The liquid crystal display screen display control system according to claim 7, characterized in that: The electrode control module includes: an electrode switch unit and a polarization control unit; The electrode switch unit is used to control the opening and closing of the electrode switches in each grid of the liquid crystal panel through a thin film transistor; The polarization control unit is used to compare the actual polarized light with the color signal and output an opening and closing control signal according to the comparison result.

9. A liquid crystal display screen display control system according to claim 8, characterized in that: The electric field scanning module includes: a scanner unit, a switch control unit and a grid color adjustment unit; The scanner unit is used to scan the liquid crystal panel using a deflection electric field, adjust the average director of the liquid crystal layer in the grid, thereby controlling the deflection rate of the light, and calculate the average director of the liquid crystal layer in each grid; The switch control unit is used to control the time when the liquid crystal grid contacts the deflection electric field by opening and closing the electrode switch; The grid color adjustment unit is used to adjust the color of the backlight source of the liquid crystal grid to be consistent with the color signal of the signal source.

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