A debugging method and system for factory settings of a low-power liquid crystal display

Abstract

The present invention relates to a debugging method for factory settings of a low-power liquid crystal display, including: sending a white image window to the display; sending an initialization command to the display; setting the factory brightness specification and color coordinate specification, and sending initialization data to the display; reading the color coordinate data of the current white image window, comparing it with the color coordinate specification, adjusting the gain data of the display according to the comparison result and sending it to the display; reading the brightness data of the current white image window, comparing it with the brightness specification, adjusting the backlight current data of the display according to the comparison result and sending it to the display, and saving the gain data and backlight current data after color temperature debugging and brightness debugging. In the present invention, the brightness specification and color coordinate specification are set. When the color coordinate data meets the color coordinate debugging specification, the light transmittance of the display is the highest. When the brightness debugging specification is met, the backlight current is adjusted. When the brightness data is within the brightness debugging specification, the backlight current is the smallest and the power consumed by the display is the smallest.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a debugging method and system for factory settings of a low-power liquid crystal display. Background Art

[0002] Energy conservation is an important social awareness in the world today, referring to a series of behaviors that minimize energy consumption and increase energy utilization efficiency. According to the definition of energy conservation proposed by the World Energy Council in 1979: all measures that are technically feasible, economically reasonable, and environmentally and socially acceptable are taken to improve the utilization efficiency of energy resources. Displays are widely used in aspects such as learning, entertainment, and office work. Nowadays, people's activities such as work, entertainment, and learning are inseparable from computer liquid crystal displays. In the actual use of computer liquid crystal displays, the vast majority of users rarely adjust the displays. When the displays leave the factory, the color temperature and brightness of the displays are adjusted. The displays leaving the factory ensure the consistency of the brightness and color temperature of the displays leaving the factory, and the brightness and color temperature of the displays leaving the factory can basically meet the usage requirements of most users. The existing factory settings of the displays only ensure the consistency of the color temperature and brightness of the displays, and rarely care whether the color temperature and brightness of the factory settings are the minimum power consumption. This makes the liquid crystal displays with factory settings not the optimal power consumption. This results in a waste of energy.

[0003] The existing factory settings for debugging the factory brightness and color temperature do not consider the power consumption of the liquid crystal display (LCD) in the factory state, resulting in the factory power not being the minimum power. An LCD is an active matrix liquid crystal display driven by thin film transistors (TFTs). It mainly uses an electric current to stimulate liquid crystal molecules to generate dots, lines, and planes, combined with a backlight bar to form an image. IPS, TFT, and SLCD all belong to the subclasses of LCD. The working principle of an LCD is as follows: Under the action of an electric field, the arrangement direction of liquid crystal molecules changes, causing the light transmittance of an external light source to change (modulation), completing the electro-optical conversion. Then, using different excitations of the R, G, and B primary color signals, through the red, green, and blue primary color filter films, the color reproduction in the time domain and spatial domain is completed. More than 70% of the power set in the factory settings of an LCD is consumed by the backlight module of the LCD. (The backlight module consists of an LED constant current board and an LED light bar). To reduce the power consumption of the backlight module, mainly reduce the backlight current in the factory setting state. The brightness set in the factory for the display screen is mainly determined by the backlight brightness and the light transmittance of the liquid crystal. The light transmittance of the liquid crystal in the factory settings of the display is controlled by the red gain, green gain, and blue gain of the LCD driver board. The maximum values of the red gain, green gain, and blue gain, without color saturation, are the highest light transmittance of the liquid crystal. During the debugging of the factory color temperature and brightness, achieving the highest light transmittance of the liquid crystal and the minimum current of the LED can result in the minimum power in the optimal factory settings state of the display.

[0004] Therefore, a debugging method and system for the factory settings of a low-power liquid crystal display are provided. During the debugging of the factory color temperature and brightness, the highest light transmittance of the liquid crystal and the minimum current of the LED are achieved, resulting in the minimum power in the optimal factory settings state of the display. With the color temperature and brightness specifications of the display remaining unchanged, the power set in the factory settings of the liquid crystal displays produced in the factory is adjusted to the minimum. Summary of the Invention

[0005] The object of the present invention is to provide a debugging method and system for the factory settings of a low-power liquid crystal display to solve the problem that the power of the display when leaving the factory is not the minimum power under the condition of the consistency of the color temperature and brightness of the display.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: A debugging method for the factory settings of a low-power liquid crystal display, characterized by including the following steps:

[0007] Step S1: Send a white image window to the display;

[0008] Step S2: Send an initialization command to the display;

[0009] Step S3: Set the factory brightness specification and color coordinate specification, and send initialization data to the display;

[0010] Step S4: Color temperature debugging, including: reading the color coordinate data of the current white image window, comparing with the color coordinate specification, and adjusting the RGB gain data of the display according to the comparison result and sending it to the display;

[0011] Step S5: Brightness debugging, including: reading the brightness data of the current white image window, comparing with the brightness specification, and adjusting the backlight current data of the display according to the comparison result and sending it to the display;

[0012] Step S6: Save the RGB gain data and backlight current data of the display after color temperature debugging and brightness debugging;

[0013] Wherein: Step S4 is repeatedly executed in sequence, and the next step is only executed after the read color coordinates meet the color coordinate specification. Step S5 is repeatedly executed in sequence until the read brightness data meets the brightness specification.

[0014] As a further optimization, the color temperature debugging method in Step S4 includes: reading the color coordinate value data x and y, and comparing them with the color coordinate specification (x_min, x_max) and (y_min, y_max) respectively, adjusting the RGB gain of the display. When the x value is in the range of (x_min, x_max), if y < y_min, then G_gain = (G_gain + 1); if y > y_max, then G_gain = (G_gain - 1). Send the adjusted G_gain value to the display; when the y value is in the range of (y_min, y_max), if x < x_min, then R_gain = (R_gain + 1); if x > x_max, then R_gain = (R_gain - 1). Send the adjusted R_gain value to the display.

[0015] As a further optimization, the brightness debugging method in Step S5 includes: the computer reads the brightness data Y of the color analyzer and compares it with the brightness specification (Y_min, Y_max), adjusts the backlight current B of the display. If Y < Y_min, then B = (B + 1), and send the adjusted backlight current B value to the display; if Y > Y_max, then B = (B - 1), and send the adjusted backlight current B value to the display.

[0016] A debugging system for the factory settings of a low-power liquid crystal display, characterized in that the system includes:

[0017] A display, which displays a white image window and receives initialization parameter data and adjusted data sent by the computer host;

[0018] A color analyzer that detects the color coordinate data and brightness data of the white image window of the current display and transmits them to the computer host;

[0019] A USB to I2C circuit board that communicates and connects to the display and the computer host respectively;

[0020] The computer host is installed with application software for debugging the color temperature and brightness of the display. The computer host sends the central white image window and data to the display through the USB to I2C circuit board, and the application software sets the color coordinate specifications and brightness specifications;

[0021] The application software detects whether the color coordinate data received from the color analyzer is within the color coordinate specifications and adjusts and updates the gain size of the display, and sends the adjusted display gain data to the display through the USB to I2C circuit board;

[0022] The application software detects whether the brightness data received from the color analyzer is within the brightness specifications and adjusts and updates the backlight current size of the display, and sends the adjusted display backlight current data to the display through the USB to I2C circuit board;

[0023] The application software commands the display to save the display gain size data and the backlight current data.

[0024] As a further optimization, the adjusted display gain includes the red gain and the green gain.

[0025] As a further optimization, the USB to I2C circuit board is connected to the computer host through a USB cable or an HDMI cable.

[0026] As a further optimization, the USB to I2C circuit board is connected to the display through an HDMI data cable.

[0027] As a further optimization, the initialization data includes data on the backlight current, red gain, green gain, blue gain, and contrast.

[0028] As a further optimization, the adjusted data includes the display gain data and the backlight current data.

[0029] Compared with the prior art, the advantages and positive effects of the present invention are as follows: During the debugging of color temperature and brightness settings in the factory, the highest transmittance of the display and the minimum current of the display LED are satisfied to achieve the minimum power under the optimal factory setting state of the display. The debugging method of the present invention is to first perform color temperature debugging and then perform brightness debugging, and set the factory color temperature specification and brightness specification. During the color temperature debugging process, the values of the RGB gains of the display are adjusted until the currently read color coordinate values are within the color coordinate specification. During the brightness debugging process, the read backlight current value of the display is adjusted until the currently read brightness value is within the brightness specification. Reducing the power consumption of the backlight module is mainly achieved by reducing the backlight current in the factory setting state. The brightness of the display factory setting is mainly determined by the backlight brightness and the transmittance of the liquid crystal. The transmittance of the liquid crystal in the display factory setting is controlled by the red gain, green gain, and blue gain of the liquid crystal display driver board. The maximum values of the red gain, green gain, and blue gain without color saturation are the highest transmittance of the liquid crystal. During the debugging of factory color temperature and brightness, the highest transmittance of the liquid crystal and the minimum current of the LED are satisfied to achieve the minimum power under the optimal factory setting state of the display. When the color coordinate values are within the color coordinate specification, the transmittance of the liquid crystal is the highest, and at the same time, when the brightness values are within the brightness specification, the backlight current is the minimum, and the power consumed by the display is the minimum. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a flowchart of the debugging method for the factory setting of the low-power liquid crystal display of the present invention;

[0031] Figure 2 is a schematic diagram of the debugging system structure for the factory setting of the low-power liquid crystal display of the present invention;

[0032] Figure 3 is a flowchart of the method for color temperature debugging of the present invention;

[0033] Figure 4 is a flowchart of the method for brightness debugging of the present invention;

[0034] Figure 5 is a circuit diagram of the USB to I2C circuit board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] Next, with reference to the accompanying drawings and specific embodiments, the present invention will be further described.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0037] Figure 1 is a flowchart of a debugging method for the factory settings of a low-power liquid crystal display according to an embodiment of the present invention. As Figure 1 shown, the method mainly includes steps S1 to S5, in combination with Figure 2 the schematic diagram of the debugging system structure involved in this method.

[0038] Step S1: Send a white image window to the display; specifically, the computer host is installed with application software for debugging color temperature and brightness, and the instructions sent by the computer are transmitted to the MCU of the liquid crystal display driver board. The computer host sends a white center window picture with 255 gray levels (8-bit image data) to the display through the graphics card.

[0039] Step S2: Send an initialization command to the display; specifically, after receiving the initialization command, the display enters the debugging state.

[0040] Step S3: Set the factory brightness specification and color coordinate specification, and send initialization data to the display; specifically, setting the factory color coordinate specification provides a color temperature setting range for subsequent color temperature debugging, and the brightness specification provides a brightness setting range for subsequent brightness debugging. Send the initialization data to the display, and the initialization data is the initial brightness value of the image, the initial color temperature value, the initial value of green gain debugging, the initial value of red gain debugging, the initial value of blue gain debugging, the backlight current of the display, and the contrast. The display updates and displays the white image window according to the received initialization data.

[0041] Step S4: Color temperature debugging, including: reading the color coordinate data of the current white image window, comparing it with the color coordinate specification, and adjusting the RGB gain data according to the comparison result and sending it to the monitor; specifically, reading the color coordinate data of the current white image window, detecting and comparing whether the read color coordinate data is within the color coordinate specification. If it is not within the color coordinate specification, adjust the green gain value, red gain value, and blue gain value of the monitor, and then send the adjusted values to the monitor. The monitor updates and displays the white image window according to the received adjusted data, and then reads, compares, and adjusts the monitor gain again. Step S4 needs to be executed repeatedly in sequence, and the next step is only executed after the read color coordinate data meets the color coordinate specification. It should be noted that the adjusted values are adjusted based on the initial values according to the detection and comparison results. The adjusted values may be the same as or different from the initial values. Since it is rather cumbersome to adjust the three gains of the monitor RGB gain, one of the gain values can also be kept unchanged, and only the other two gain values are adjusted separately. The factory-set color temperature is achieved by adjusting the magnitudes of the red gain, green gain, and blue gain of the monitor to change the luminous intensities of the red pixels, green pixels, and blue pixels to achieve the white balance of the monitor. The red gain, green gain, and blue gain are maximized to the highest light transmittance of the liquid crystal when there is no color saturation. The color temperature debugging ensures the highest light transmittance of the monitor.

[0042] Step S5: Brightness debugging, including: reading the brightness data of the current white image window, comparing it with the brightness specification, and adjusting the backlight current data of the monitor according to the comparison result and sending it to the monitor; specifically, reading the brightness data of the current white image window, detecting and comparing whether the read brightness value is within the brightness specification. If it is not within the color coordinate specification, adjust the backlight current of the monitor, and then send the adjusted backlight current value to the monitor. The monitor updates and displays the white image window according to the received adjusted data, and then reads, compares, and adjusts the backlight current of the monitor again. Step S5 needs to be executed repeatedly in sequence until the currently read brightness value is within the brightness specification.

[0043] Step S6: Save the RGB gain data and backlight current data after color temperature debugging and brightness debugging; specifically, the saved data is the factory-set data, and the power of these data is the lowest.

[0044] Among them: Step S4 is executed repeatedly in sequence, and the next step is only executed after the read color coordinates meet the color coordinate specification. Step S5 is executed repeatedly in sequence until the read brightness data meets the brightness specification.

[0045] In the debugging of factory-set color temperature and brightness, the minimum power in the state of the best factory settings of the display can be achieved by satisfying the highest transmittance of the display and the minimum current of the display LED. The debugging method of the present invention is to first perform color temperature debugging and then perform brightness debugging, and set the factory color temperature specification and brightness specification. During the color temperature debugging process, the values of the RGB gains of the display are adjusted until the currently read color coordinate values are within the color coordinate specification. During the brightness debugging process, the read backlight current value of the display is adjusted until the currently read brightness value is within the brightness specification. Reducing the power consumption of the backlight module is mainly achieved by reducing the backlight current in the factory-set state. The brightness of the display in the factory settings is mainly determined by the backlight brightness and the transmittance of the liquid crystal. The transmittance of the liquid crystal in the display in the factory settings is controlled by the red gain, green gain, and blue gain of the liquid crystal display driver board. The maximum values of the red gain, green gain, and blue gain without color saturation are the highest transmittance of the liquid crystal. In the debugging of the factory color temperature and brightness, the minimum power in the state of the best factory settings of the display can be achieved by satisfying the highest transmittance of the liquid crystal and the minimum current of the LED. When the color coordinate values are within the color coordinate specification and the transmittance of the liquid crystal is the highest, and at the same time when the brightness values are within the brightness specification and the backlight current is the minimum, the power consumed by the display is the minimum.

[0046] The following gives a numerical example. For example, the main content of the factory debugging of a liquid crystal display is that the color temperature and brightness meet the product specifications. Most of the color temperatures of the liquid crystal display restored to the factory state are 6500K, and the brightness is 200 cd / m 2 . For example: The factory debugging specifications (specifications when restoring to the factory settings) of a 27-inch liquid crystal display (resolution: 1920*1080@60Hz) are: among them, color temperature: 6500K, color coordinates x = 0.313 ± 0.005, y = 0.329 ± 0.005, brightness: Y = 200 ± 10 cd / m 2Parameter description during debugging: For the color coordinates of the white window at the center of the display, the horizontal coordinate is represented by x, and the vertical coordinate is represented by y. The brightness value of the white image window is represented by Y. The liquid crystal red gain is represented by R_gain (the range of R_gain is 0 - 255, the larger the value, the stronger the red. 128 is the original value of the liquid crystal screen). The liquid crystal green gain is represented by G_gain (the range of G_gain is 0 - 255, the larger the value, the stronger the green. 128 is the original value of the liquid crystal screen). The liquid crystal blue gain is represented by B_gain (the range of B_gain is 0 - 255, the larger the value, the stronger the blue. 128 is the original value of the liquid crystal screen). The current of the backlight is represented by B. (The range is 0 - 255, the larger the value, the larger the current of the backlight bar, the brighter the display backlight, and the brighter the white window of the liquid crystal display). C represents the contrast of the display (the range is 0 - 255, the larger the value, the brighter the screen). Y_max represents the maximum value of the factory-set brightness of the display, and Y_min represents the minimum value of the factory-set brightness of the display. x represents the horizontal color coordinate of the current color analyzer. x_max represents the maximum value of x of the factory-set color temperature coordinates. x_min represents the minimum value of x of the factory-set color temperature coordinates. y represents the vertical color coordinate of the current color analyzer. y_max represents the maximum value of y of the factory-set color temperature coordinates. y_min represents the minimum value of y of the factory-set color temperature coordinates. R_gain_c represents the initial value of the liquid crystal red gain during debugging. G_gain_c represents the initial value of the liquid crystal green gain during debugging. B_gain_c represents the initial value of the liquid crystal blue gain during debugging.

[0047] The computer host sends a central white image window to the display through the graphics card, thereby controlling the display to display the all-white image. The computer sends an initialization command to the display, and the display enters the factory mode to facilitate subsequent specification parameters. Set the factory brightness debugging specifications and color coordinate debugging specification data. The computer sends initialization parameter data to the display MCU. The initialization parameter data includes the backlight current B, red gain R_gain, green gain G_gain, blue gain B_gain, and contrast C. Among them, color temperature: 6500K, color coordinates x = 0.313 ± 0.005, y = 0.329 ± 0.005, brightness: Y = 200 ± 10 cd / m 2, that is, set the factory color coordinate specifications: x_max = 0.318, x_min = 0.308, y_max = 0.334, y_min = 0.324, and set the initial values of the red gain, green gain, and blue gain of the display. For example, set the initial value of the backlight current B = 205 when the display leaves the factory, R_gain_c = 128, G_gain_c = 128, B_gain_c = 128. The computer sends the initialization parameter data to the display MCU. At this time, R_gain = R_gain_c, G_gain = G_gain_c, B_gain = B_gain_c. The color analyzer collects the parameter data of the white image window of the display in real time and transfers the data to the computer in real time, that is, the color analyzer transfers the x, y, and Y values of the white image window of the display to the computer. The computer compares the color coordinates of the received white image window of the display with the debugging specification data. The computer adjusts the red gain R_gain and green gain G_gain of the display according to the comparison result and sends them to the display, that is, the computer compares the received x value with the color coordinate debugging specification data (x = 0.313 ± 0.005) and adjusts the red gain R_gain of the display accordingly. The computer compares the received y value with the color coordinate debugging specification data (y = 0.329 ± 0.015) and adjusts the red gain G_gain of the display accordingly. The computer sends the adjusted red gain R_gain and green gain G_gain to the display. The color analyzer sends the collected data to the computer again for comparison and processing until the x value received by the computer is within the color coordinate debugging specification data (x = 0.313 ± 0.005) and the y value is within the color coordinate debugging specification data (y = 0.329 ± 0.005). The flow chart of the method for the computer to compare the received x and y values with the color coordinate debugging specification data and adjust the red gain R_gain and green gain G_gain of the display accordingly is as Figure 3 shown. When the x value is in the range of (x_min, x_max), if y < y_min, then G_gain = (G_gain + 1); if y > y_max, then G_gain = (G_gain - 1); when the y value is in the range of (y_min, y_max), if x < x_min, then R_gain = (R_gain + 1); if x > x_max, then R_gain = (R_gain - 1); if x is in the range of (x_min, x_max) and y is in the range of (y_min, y_max), end the color temperature debugging and proceed to the next step. Finally, the color coordinates x = 0.313 ± 0.005 y = 0.329 ± 0.005 can be obtained.

[0048] Further, after the color temperature and color coordinates meet the specifications, brightness debugging is performed. The computer compares the brightness Y of the white image window of the monitor received with the brightness specification data. The computer adjusts the backlight current B of the monitor according to the comparison result and sends it to the monitor. As Figure 4 shown, the method for the brightness debugging to meet the specifications includes: the computer reads the brightness data Y of the color analyzer and adjusts the backlight current B of the monitor after comparing it with the brightness specification range (Y_min, Y_max). If Y < Y_min, then B = (B + 1); if Y > Y_max, then B = (B - 1). If Y is within the brightness specification range (Y_min, Y_max), the backlight current reaches the minimum value, and at this time it is the minimum power. In the factory debugging of color temperature and brightness, when the minimum current of the monitor is satisfied, the minimum power in the factory-set state of the monitor is achieved.

[0049] As a further optimization, it also includes: the computer host saves the debugged data and assigns the debugged data as the initial value of the next monitor, which speeds up the debugging speed of the monitor.

[0050] A debugging system for the factory settings of a low-power liquid crystal display. The system includes: a monitor, which displays a white image window and receives the initialization parameter data and adjusted data sent by the computer host; a color analyzer, which detects the color coordinate data and brightness data of the white image window of the current monitor and transmits them to the computer host; a USB to I2C circuit board, which is communicatively connected to the monitor and the computer host respectively; a computer host, which is installed with application software for debugging the color temperature and brightness of the monitor. The computer host sends a central white image window and data to the monitor through the USB to I2C circuit board. The application software is set with color coordinate specifications and brightness specifications; the application software detects whether the color coordinate data received from the color analyzer is within the color coordinate specifications and adjusts and updates the gain size of the monitor, and sends the adjusted monitor gain data to the monitor through the USB to I2C circuit board; the application software detects whether the brightness data received from the color analyzer is within the brightness specifications and adjusts and updates the backlight current size of the monitor, and sends the adjusted monitor backlight current data to the monitor through the USB to I2C circuit board; the application software commands the monitor to save the monitor gain size data and backlight current data. Only when the color coordinate data is within the color coordinate specifications, the application software (computer host) detects the brightness data received from the color analyzer, judges whether it is within the brightness specifications, judges whether to adjust and update the backlight current size of the monitor. After the color coordinates meet the specifications and the brightness meets the specifications, the application software (computer host) commands the monitor to save the monitor gain size data and backlight current data. As Figure 2As shown, the connection methods of a liquid crystal display, a computer mainframe, a color analyzer, and a USB to I2C circuit board. The computer mainframe is installed with application software for debugging color temperature and brightness. The MCU of the liquid crystal display driver board receives instructions sent by the computer mainframe (application software). The computer reads the color coordinates and brightness of the display screen tested by the color analyzer through a USB cable. The computer mainframe sends a white center window screen with 255 gray levels (8-bit image data) through the graphics card. The light sensor of the color analyzer measures the color coordinates and brightness of the white window of the display.

[0051] As a further optimization, the display gain adjusted by the computer mainframe (application software) includes red gain and green gain. The computer mainframe (application software) detects whether the color coordinate data received from the color analyzer is within the color coordinate specifications and adjusts and updates the values of the red gain and green gain, and sends the data of the adjusted and updated display gain size to the display through the USB to I2C circuit board. The display redraws the white image window according to the received data.

[0052] As a further optimization, the USB to I2C circuit board is connected to the computer mainframe through a USB cable and an HDMI cable.

[0053] As a further optimization, the USB to I2C circuit board includes a USB connector, a USB to I2C chip U14, a first HDMI connector, and a second HDMI connector. The output end of the USB connector is connected to the input end of the USB to I2C chip U14, the output end of the chip U14 is connected to the input end of the second HDMI connector, and the output end of the first HDMI connector is connected to the input end of the second HDMI connector. As Figure 5 shown, the second pin of the USB connector is connected to the eighth pin of the chip U14, the third pin of the USB connector is connected to the seventh pin of the chip U14. The first HDMI connector and the second HDMI connector are CN9 and CN10 respectively. The 15th and 16th pins of the chip U14 are respectively connected to the 16th and 15th pins of CN10, and the 16th and 15th pins of CN10 are respectively connected to the 16th and 15th pins of CN9. The USB to I2C circuit board is connected to the computer mainframe through a USB cable and an HDMI cable. The computer can communicate with the display through USB, and the computer can communicate with the display more quickly and conveniently. The computer can transmit images to the display at high speed through the HDMI cable.

[0054] As a further optimization, the USB to I2C circuit board is connected to the display through an HDMI data cable.

[0055] As a further optimization, the initialization data includes data such as backlight current, red gain, green gain, blue gain, and contrast.

[0056] As a further optimization, the adjusted data includes monitor gain data and backlight current data. The computer host is installed with application software for debugging the color temperature and brightness of the monitor. The computer host sends a central white image window to the monitor through a USB to I2C circuit board, detects whether the parameter data received from the color analyzer is within the set range, adjusts the parameter data, and sends the adjusted parameter data to the monitor through the USB to I2C circuit board.

[0057] The debugging process is as follows:

[0058] a. The computer host is installed with application software for debugging color temperature and brightness. The computer host sends a central white screen as shown Figure 2 below. (8-bit data 255 gray-scale white screen).

[0059] b. The computer host (application software) sends an initialization to enter the monitor factory mode to the monitor MCU through a USB cable.

[0060] c. The computer host (application software) sends initialization parameters to the monitor MCU through a USB cable. The host (application software) sets color coordinate specifications and brightness specifications. The initialization parameters include B = 205, (80% of the backlight current), R_gain = 128, G_gain = 128, B_gain = 128, C = 255. As described before, the color coordinate specifications are x = 0.313 ± 0.005, y = 0.329 ± 0.005, and the brightness specification: Y = 200 ± 10 cd / m 2 ².

[0061] d. The computer host (application software) compares the color coordinates of the monitor white window read with the target color coordinate specifications of the factory debugging. Then it changes the values of R_gain and G_gain of the monitor to make the test color temperature coordinates of the white window conform to the factory setting specifications. (Debugging of the factory-set color temperature)

[0062] e. The computer host (application software) adjusts the backlight current C of the monitor according to the brightness Y of the monitor white window read, and then compares Y with the debugging brightness specifications (Y_max and Y_min) to make the factory brightness Y of the monitor meet the debugging specifications. Among them, the debugging of the color temperature is carried out only after the color coordinate specifications are met for the debugging of the brightness specifications.

[0063] f. The computer host (application software) reads whether the current color temperature coordinates (x, y) and Y respectively meet the debugging specifications {(x_min, x_max), (y_min, y_max)} and (Y_min, Y_max). If they meet the specifications, it proceeds to the next step. If not, it returns to step d.

[0064] g. The computer mainframe (application software) sends a save instruction to the display MCU to save the R_gain, G_gain, B_gain, and B values in the factory mode. The computer memorizes the R_gain, G_gain, B_gain, and B values that have been debugged successfully. Assign the R_gain, G_gain, B_gain, and B values that have been debugged for this display to the initialization debug values of the next LCD monitor to be debugged, so as to speed up the debugging speed of the next machine.

[0065] h. End the debugging.

[0066] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, and the working principle of the present invention has been elaborated. However, the present invention is not limited to this. All changes made within the scope of knowledge of those skilled in the art without departing from the purpose of the present invention are within the protection scope of the present invention.

Claims

1. A debugging method for the factory settings of a low-power liquid crystal display, characterized in that, Including the following steps: Step S1: Send a white image window to the display; Step S2: Send an initialization command to the display; Step S3: Set the factory brightness specification and color coordinate specification, and send initialization data to the display; Step S4: Color temperature debugging, including: reading the color coordinate data of the current white image window, comparing with the color coordinate specification, and adjusting the RGB gain data of the display according to the comparison result and sending it to the display; the color temperature debugging satisfies the highest transmittance of the display; Step S5: Brightness debugging, including: reading the brightness data of the current white image window, comparing with the brightness specification, and adjusting the backlight current data of the display according to the comparison result and sending it to the display; when the color coordinate value is within the color coordinate specification, the transmittance of the liquid crystal is the highest, and at the same time when the brightness value is within the brightness specification, the backlight current is the smallest; Step S6: Save the RGB gain data and backlight current data of the display after color temperature debugging and brightness debugging; Wherein: Step S4 is repeatedly executed in sequence, and the next step is only executed after the read color coordinates meet the color coordinate specification. Step S5 is repeatedly executed in sequence until the read brightness data meets the brightness specification; the brightness specification debugging is only carried out after the color temperature debugging meets the color coordinate specification.

2. The debugging method for the factory settings of a low-power liquid crystal display according to claim 1, characterized in that, The color temperature debugging method in Step S4 includes: reading the color coordinate value data x and y, and comparing them with the color coordinate specifications (x_min, x_max) and (y_min, y_max) respectively, adjusting the RGB gain of the display. When the x value is within the (x_min, x_max) specification, if y < y_min, then G_gain = (G_gain + 1); if y > y_max, then G_gain = (G_gain - 1), and send the adjusted G_gain value to the display; when the y value is within the (y_min, y_max) specification, if x < x_min, then R_gain = (R_gain + 1); if x > x_max, then R_gain = (R_gain - 1), and send the adjusted R_gain value to the display.

3. The debugging method for the factory settings of a low-power liquid crystal display according to claim 1, characterized in that: The brightness debugging method in Step S5 includes: reading the brightness data Y, comparing it with the brightness specification (Y_min, Y_max), adjusting the backlight current B of the display. If Y < Y_min, then B = (B + 1), and send the adjusted backlight current B value to the display; if Y > Y_max, then B = (B - 1), and send the adjusted backlight current B value to the display.

4. A debugging system for the factory settings of a low-power liquid crystal display, characterized in that, The system includes: A display, which displays a white image window and receives the initialization parameter data and adjusted data sent by the computer host; A color analyzer, which detects the color coordinate data and brightness data of the white image window of the current display and transmits them to the computer host; A USB to I2C circuit board, which is communicatively connected to the display and the computer host respectively; A computer host, which is installed with application software for debugging the color temperature and brightness of the display. The computer host sends a central white image window and data to the display through the USB to I2C circuit board, and the application software is set with color coordinate specifications and brightness specifications; The application software detects whether the color coordinate data received from the color analyzer is within the color coordinate specifications and adjusts and updates the display gain size, and sends the adjusted display gain data to the display through the USB-to-I2C circuit board; the color temperature debugging ensures the highest transmittance of the display; The application software detects whether the brightness data received from the color analyzer is within the brightness specifications and adjusts and updates the display backlight current size, and sends the adjusted display backlight current data to the display through the USB-to-I2C circuit board; when the color coordinate value is within the color coordinate specifications, the transmittance of the liquid crystal is the highest, and at the same time when the brightness value is within the brightness specifications, the backlight current is the smallest; The application software commands the display to save the display gain size data and the backlight current data.

5. The debugging system for the factory settings of a low-power liquid crystal display according to claim 4, characterized in that: The adjusted display gain includes red gain and green gain.

6. The debugging system for the factory settings of a low-power liquid crystal display according to claim 4, characterized in that: The USB-to-I2C circuit board is connected to the computer host through a USB cable and an HDMI cable.

7. The debugging system for the factory settings of a low-power liquid crystal display according to claim 4, characterized in that: The USB-to-I2C circuit board is connected to the display through an HDMI data cable.

8. The debugging system for the factory settings of a low-power liquid crystal display according to claim 4, characterized in that: The initialization data includes data on backlight current, red gain, green gain, blue gain, and contrast.

9. The debugging system for the factory settings of a low-power liquid crystal display according to claim 4, characterized in that: The adjusted data includes display gain data and backlight current data.

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