Correction apparatus, display device, correction method and display method

Abstract

The present disclosure relates to the field of medical image display. Provided are a correction apparatus, a display device, a correction method and a display method. Specifically, the correction apparatus comprises: a first photosensor, which is configured to perform primary color light detection on a first display image of a first test image on a display panel at a target color temperature, so as to obtain a plurality of first test photosensitive values; a first converter, which is configured to convert the plurality of first test photosensitive values into a first test value and a second test value, wherein the first test value is related to a first primary color in a display color temperature of the first display image, and the second test value is related to a second primary color in the display color temperature; and a first corrector, which is configured to sequentially correct the first test value and the second test value to obtain color temperature correction data, wherein the color temperature correction data is used for correcting the display color temperature of the first display image, the corrected display color temperature of the first display image is a corrected display color temperature, and the difference between the corrected display color temperature and the target color temperature satisfies a color temperature display condition.

Description

Calibration device, display device, calibration method and display method Technical Field

[0001] This disclosure relates to the field of medical image display, and more particularly to a calibration device, display equipment, calibration method, and display method. Background Technology

[0002] Medical diagnostic monitors standardize the display of medical images to assist doctors in making accurate diagnoses. However, prolonged use of a monitor can cause changes in its color temperature and brightness, which can lead to deviations in the monitor's standardized display capabilities.

[0003] Summary of the Invention

[0004] This disclosure provides a calibration apparatus, a display device, a calibration method, and a display method.

[0005] According to a first aspect, this disclosure provides a calibration apparatus, comprising: a first photosensor configured to perform primary color light detection on a first display screen of a first test image at a target color temperature on a display panel to obtain a plurality of first test photosensitivity values; a first converter configured to convert the plurality of first test photosensitivity values ​​into first test values ​​and second test values, wherein the first test values ​​are related to a first primary color in the display color temperature of the first display screen, and the second test values ​​are related to a second primary color in the display color temperature; and a first calibrator configured to sequentially calibrate the first test values ​​and the second test values ​​to obtain color temperature calibration data, wherein the color temperature calibration data is used to calibrate the display color temperature of the first display screen, the calibrated display color temperature of the first display screen is the calibrated display color temperature, and the difference between the calibrated display color temperature and the target color temperature satisfies the color temperature display conditions.

[0006] For example, the first converter includes: a primary color converter configured to convert a plurality of first test photosensitivity values ​​into a plurality of color excitation values ​​according to the relative visibility coefficient of the target color temperature, the relative visibility coefficient representing the relationship between the plurality of primary color lights and the display color temperature; and a first calculator configured to calculate a first test value and a second test value according to the plurality of color excitation values.

[0007] For example, the first calibrator includes a second calculator configured to calculate the relative visibility coefficients of each of the primary color lights based on an initial photosensitivity value and initial chromaticity values ​​of the primary color lights. The initial chromaticity value and the initial photosensitivity value are obtained by the first photosensor detecting the display panel in its initial state at a target color temperature for the display of a first test image.

[0008] For example, the first converter includes: a first generator configured to generate a first test value based on the ratio of the test sensitivity value of a first primary color to the test sensitivity value of a third primary color among a plurality of test sensitivity values; and a second generator configured to generate a second test value based on the ratio of the test sensitivity value of a second primary color to the test sensitivity value of a third primary color among a plurality of test sensitivity values.

[0009] For example, the first corrector includes: a first adjuster configured to adjust a first gain value based on the difference between a first standard value and a first test value such that the difference between the first standard value and the first test value is less than or equal to a first threshold, wherein the first gain value is used to correct a first primary color in the display color temperature; and a second adjuster configured to, in response to the difference between the first standard value and the first test value being less than or equal to the first threshold, adjust a second gain value based on the difference between a second standard value and a second test value such that the difference between the second standard value and the second test value is less than or equal to a second threshold, wherein the second gain value is used to correct a second primary color in the display color temperature; wherein the color temperature correction data includes the adjusted first gain value and the adjusted second gain value.

[0010] For example, the first calibrator further includes a third adjuster configured to adjust a third gain value when it is determined that the adjusted first gain value is equal to a calibration threshold and the difference between the first standard value and the first test value is greater than the first threshold, wherein the third gain value is used to correct the third primary color in the display color temperature.

[0011] For example, the first adjuster is also configured to adjust the first gain value when it is determined that the adjusted second gain value is equal to the correction threshold and the difference between the second standard value and the second test value is greater than the second threshold.

[0012] For example, the calibration apparatus further includes: a second converter configured to convert multiple test photosensitivity values ​​into a third test value in response to the difference between the calibrated display color temperature and the target color temperature satisfying the color temperature display condition; and a second calibrator configured to calibrate the third test value to obtain brightness calibration data, wherein the brightness calibration data is used to calibrate the display brightness of the first display, the display brightness of the first display after calibration based on the brightness calibration data is the calibrated display brightness, and the difference between the calibrated display brightness and the target brightness satisfies the brightness display condition.

[0013] For example, the second converter is configured to convert multiple test photosensitivity values ​​into a third test value based on the luminance excitation coefficient of the target color temperature; the luminance excitation coefficient characterizes the relationship between multiple primary color lights and display brightness.

[0014] For example, the second calibrator includes: a third calculator configured to determine the brightness excitation coefficients of each of the multiple primary color lights based on the initial photosensitivity value and the initial brightness values ​​of the multiple primary color lights; wherein the initial photosensitivity value and the initial brightness value are obtained by the first photosensor for detecting the display screen of the display panel in the initial state at the target color temperature for the display of the first test image.

[0015] For example, the first photosensitive sensor is further configured to, in response to the difference between the display color temperature of the first display screen after correction based on color temperature correction data and the target color temperature satisfying the color temperature display condition, perform primary color light detection on the second display screen displayed on the display panel for the second test image to obtain multiple second test photosensitive values; and the first converter is further configured to convert the multiple second test photosensitive values ​​into color temperature deviations; and the first corrector is further configured to, based on the color temperature correction data and the color temperature deviations, set a gamma curve, the gamma curve indicating the relationship between the display brightness of the display screen and the grayscale image display effect.

[0016] For example, the calibration device further includes: a second photosensor configured to: detect the backlight brightness of the display panel and obtain a backlight brightness value; wherein the first calibrator is further configured to calibrate the display brightness of the display panel based on the backlight brightness value.

[0017] According to a second aspect, this disclosure provides a display device, including: a calibration device provided in the embodiments of this disclosure, configured to set color temperature calibration data; and a display panel, configured to display a display image based on the color temperature calibration data.

[0018] For example, the display device also includes: a frame covering the edge of the display panel, the frame having a cavity and an opening; and a motor assembly fixedly disposed in the cavity, the motor assembly including a sliding component; wherein, the first photosensitive unit of the calibration unit is fixedly connected to the sliding component, and the sliding component drives the first photosensitive unit to pop out of the cavity from the opening or retract into the cavity.

[0019] For example, the motor assembly also includes: a conductive carrier fixedly disposed at one end of the sliding assembly, a first photosensitive sensor fixedly disposed on the conductive carrier, and the conductive carrier being electrically connected to the first photosensitive sensor, the first converter, and the first corrector.

[0020] For example, the motor assembly also includes a shielding component, which is fixedly disposed on the conductive carrier and surrounds the first photosensor, wherein the shielding component fills the opening when the sliding component drives the first photosensor to retract from the opening into the cavity.

[0021] According to a third aspect, this disclosure also provides a correction method, comprising: acquiring a plurality of first test photosensitivity values ​​of the display screen of a display panel, wherein the plurality of first test photosensitivity values ​​are obtained by detecting the primary color light of the display screen of the display panel for a test image at a target color temperature; determining a first test value and a second test value based on the plurality of first test photosensitivity values, wherein the first test value represents a first primary color of the display color temperature indication of the display screen, and the second test value represents a second primary color of the display color temperature indication; and correcting the display color temperature of the display screen sequentially based on the first test value and the second test value to obtain color temperature correction data, such that the difference between the display color temperature of the display screen corrected based on the color temperature correction data and the target color temperature satisfies the color temperature display conditions.

[0022] According to the fourth aspect, this disclosure also provides a display method, including: acquiring a display image; and displaying the display image based on color temperature correction data, wherein the color temperature correction data is obtained based on the correction method provided in the embodiments of this disclosure. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the structure of a correction device according to an embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure;

[0025] Figure 3 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure;

[0026] Figure 4 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure;

[0027] Figure 5 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure;

[0028] Figure 6 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure;

[0029] Figure 7 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure;

[0030] Figure 8 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure;

[0031] Figure 9 is a schematic diagram of the structure of a display device according to an embodiment of the present disclosure;

[0032] Figure 10 is a schematic diagram of the structure of a display device according to another embodiment of the present disclosure;

[0033] Figure 11 is a schematic diagram of the structure of a motor assembly according to an embodiment of the present disclosure;

[0034] Figure 12 is a schematic diagram of the structure of a display device according to another embodiment of the present disclosure;

[0035] Figure 13 is a schematic flowchart of a correction method according to an embodiment of the present disclosure;

[0036] Figure 14 is a schematic flowchart of a correction method according to another embodiment of the present disclosure;

[0037] Figure 15 is a schematic flowchart of a correction method according to another embodiment of the present disclosure;

[0038] Figure 16 is a schematic flowchart of a correction method according to another embodiment of the present disclosure; and

[0039] Figure 17 is a schematic flowchart of a display method according to an embodiment of the present disclosure. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure. It should be noted that throughout the accompanying drawings, the same elements are represented by the same or similar reference numerals. In the following description, some specific embodiments are used for descriptive purposes only and should not be construed as limiting this disclosure in any way, but are merely examples of embodiments of this disclosure. Conventional structures or configurations will be omitted where they may cause confusion in understanding this disclosure. It should be noted that the shapes and dimensions of the components in the figures do not reflect actual size and proportion, but are only schematic representations of the embodiments of this disclosure.

[0041] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure shall have the ordinary meaning as understood by those skilled in the art. The terms "first," "second," and similar words used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components.

[0042] Furthermore, in the description of the embodiments disclosed herein, the terms "connected" or "connected to" can refer to two components being directly connected, or to two components being connected via one or more other components. Additionally, these two components can be connected or coupled via wired or wireless means.

[0043] Figure 1 is a schematic diagram of the structure of a correction device according to an embodiment of the present disclosure.

[0044] As shown in Figure 1, the calibration device 100 includes a first photosensor 110, a first converter 120, and a first calibrator 130.

[0045] In this embodiment of the disclosure, the calibration device 100 is used to detect the display image of the display panel and determine the display color temperature of the display image. This allows the display capability of the display panel to be calibrated based on the display color temperature, thereby reducing the color temperature deviation of the display panel and ensuring the standard display capability of the display panel for medical images.

[0046] In this embodiment of the disclosure, the first photosensitive sensor 110 performs primary color light detection on the first display screen of the first test image at the target color temperature of the display panel to obtain multiple first test photosensitive values.

[0047] For example, the target color temperature can be the standard color temperature for displaying medical images on a medical monitor, such as, but not limited to, 5000K, 6500K, and 7000K. The first test image can be a solid color image; for example, if all pixel values ​​of the first test image are (255, 255, 255), the first display screen showing the first test image is white. Another example is if all pixel values ​​of the first test image are (0, 0, 0), the first display screen showing the first test image is black. Yet another example is if all pixel values ​​of the first test image are (255, 0, 0), the first display screen showing the first test image is red. Yet another example is if all pixel values ​​of the first test image are (0, 255, 0), the first display screen showing the first test image is green. Yet another example is if all pixel values ​​of the first test image are (0, 0, 255), the first display screen showing the first test image is blue.

[0048] For example, the first photosensor 110 can be a photosensor sensor. The first photosensor 110 collects the primary color light emitted when the first display image of the display panel is a white image, converts the light information into electrical information, and thus determines the display effect of the display panel. For example, after the monitor is powered on and warmed up, the monitor is controlled to display a first test image, and the first photosensor 110 is used to detect the first display image of the monitor's display panel.

[0049] In this embodiment, the first photosensor 110 detects the display panel's ability to display multiple primary color lights, obtaining multiple first test photosensitivity values. For example, the primary color lights can be red, green, and blue (RGB) primary color lights. For example, the multiple first test photosensitivity values ​​can be values ​​sensed from the RGB three primary colors in the RGB color space, or values ​​sensed from brightness, red-green, and yellow-blue in the Lab color space, or values ​​sensed from hue, saturation, and brightness in the HSV color space, etc. This disclosure describes the color space of the first test image as consistent with the color space of the first display screen, but does not limit the content of the color space corresponding to the multiple first test photosensitivity values.

[0050] In this embodiment, a first converter 120 converts multiple first test photosensitivity values ​​into first test values ​​and second test values. A first corrector 130 sequentially corrects the first test values ​​and second test values ​​to obtain color temperature correction data. The color temperature correction data is used to correct the display color temperature of the first display screen. The corrected display color temperature of the first display screen is the corrected display color temperature, and the difference between the corrected display color temperature and the target color temperature satisfies the color temperature display conditions. The first test value is related to the first primary color in the display color temperature of the first display screen, and the second test value is related to the second primary color in the display color temperature.

[0051] For example, the first converter 120 and the first corrector 130 can be implemented by a system on a chip (SOC).

[0052] For example, multiple first test photosensitivity values ​​can be values ​​obtained by sensing the three primary colors of RGB in the RGB color space. These multiple first test photosensitivity values ​​include photosensitivity values ​​for the red primary color, the green primary color, and the blue primary color. For example, the first primary color can be the blue primary color, and the second primary color can be the red primary color. Therefore, the first test value is related to the blue primary color in the display color temperature of the first display screen, and the second test value is related to the red primary color in the display color temperature. The display panel's ability to display the blue primary color can be determined by the first test value, and its ability to display the red primary color can be determined by the second test value.

[0053] For example, the display color temperature is the actual color temperature when the display panel displays the first display image. When the difference between the actual color temperature and the standard color temperature when the display panel displays the first display image meets the color temperature display conditions, the display panel's ability to display the three primary colors (red, green, and blue) reaches the standard display capability. For example, the color temperature display condition can be that the difference between the actual color temperature and the standard color temperature is less than a preset value, which can be 50. This disclosure does not limit the value of the preset value. For example, the preset value for the color temperature display condition indicator can be determined based on the standardized display of medical diagnostic monitors. When the difference between the actual color temperature and the standard color temperature when the display panel displays the first display image meets the color temperature display conditions, the display panel can accurately display medical images.

[0054] In this embodiment of the disclosure, the first corrector 130 sequentially corrects the first test value and the second test value to adjust the display panel's display capability regarding primary color light, thereby correcting the display color temperature of the first display image. The color temperature correction data may include adjustment parameters for the display panel's display capability regarding primary color light. For example, when it is determined based on the first test value that the display panel's display level of the first primary color is low, the first corrector 130 can enhance the display panel's display level of the first primary color; therefore, the adjustment parameters included in the color temperature correction data indicate the degree of enhancement. Conversely, when it is determined based on the second test value that the display panel's display capability of the second primary color is too strong, the first corrector 130 can reduce the display panel's display level of the second primary color; therefore, the adjustment parameters included in the color temperature correction data indicate the degree of reduction.

[0055] In this embodiment, the adjustment process of the first corrector 130 on the display panel's display capability regarding the first primary color significantly affects the display panel's display capability regarding the second primary color, while the adjustment process of the first corrector 130 on the display panel's display capability regarding the second primary color has a smaller impact. Therefore, the first corrector 130 first corrects the first test value to correct the display panel's display capability regarding the first primary color until the display panel's display capability regarding the first primary color reaches the expected level. After the display panel's display capability regarding the first primary color reaches the expected level, the first corrector 130 then corrects the second test value to correct the display panel's display capability regarding the second primary color until the display panel's display capability regarding the second primary color reaches the expected level. This ensures that the correction operation of the first corrector 130 on the second test value does not adversely affect the display panel's display capability regarding the first primary color, thereby optimizing the correction process and improving correction efficiency.

[0056] In this embodiment, the first calibrator 130 can also control the detection state of the first photosensor 110. For example, in response to a received calibration command, the first calibrator 130 controls the display panel to display a first test image and sends a control command to the first photosensor 120, causing the first photosensor 110 to perform primary color light detection on the first display screen based on the control command, thereby obtaining multiple first test photosensitivity values. The first converter 120 reads the multiple first test photosensitivity values ​​and converts them into first test values ​​and second test values. The first calibrator 130 reads the first test values ​​and second test values ​​and corrects the display color temperature of the first display screen by correcting the first test values ​​and second test values, thereby obtaining color temperature correction data.

[0057] In this embodiment, the color temperature of the display panel is corrected based on the correction device 100, ensuring that the difference between the displayed color temperature and the target color temperature meets the color temperature display requirements, thereby reducing the impact of color temperature deviation on the display panel's display capabilities. Furthermore, during the correction process, the first corrector 130 prioritizes adjusting the display panel's display capability for blue primary colors, and then adjusts its display capability for red primary colors, thus providing both efficiency and accuracy in color temperature correction.

[0058] Figure 2 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure.

[0059] As shown in Figure 2, the calibration device 200 includes a first photosensitive sensor 210, a first converter 220, and a first corrector 230. The first converter 220 includes a primary color converter 221 and a first calculator 222, and the first corrector 230 includes a first adjuster 231 and a second adjuster 232.

[0060] In this embodiment, the first photosensor 210 is similar to the first photosensor 110 described above, and will not be repeated for the sake of brevity.

[0061] In this embodiment of the disclosure, the primary color converter 221 converts multiple first test photosensitivity values ​​into multiple color excitation values ​​based on the relative visibility coefficient of the target color temperature. The first calculator 222 calculates the first test value and the second test value based on the multiple color excitation values.

[0062] In this embodiment, the relative visibility coefficient characterizes the relationship between multiple primary color lights and the display color temperature. The relative visibility coefficient is related to the detection capability of the first photosensor 220 for the primary color lights, and the relative visibility coefficient can be predetermined. The photosensitivity of the first photosensor 220 for different target color temperatures is tested to determine the relative visibility coefficients corresponding to each of the multiple target color temperatures. In the subsequent process of correcting the color temperature deviation of the display panel for a certain target color temperature, the first converter 220 can directly determine the first test value and the second test value based on the relative visibility coefficient, without needing to redetermine the relative visibility coefficient.

[0063] In this embodiment of the disclosure, the color stimulus value can be the tristimulus value XYZ in the XYZ color space. For example, multiple first test photosensitivity values ​​include red primary color photosensitivity value, green primary color photosensitivity value, and blue primary color photosensitivity value. The tristimulus value XYZ can characterize the human eye's perception of the three primary colors: red, green, and blue. For example, stimulus value X represents the stimulus amount of red primary color, stimulus value Y represents the stimulus amount of green primary color, and stimulus value Z represents the stimulus amount of blue primary color. Therefore, converting multiple first test photosensitivity values ​​into tristimulus values ​​XYZ can more accurately represent the human eye's perception of the display color temperature when viewing the first display screen.

[0064] In this embodiment of the disclosure, the primary color converter 221 converts multiple first test photosensitivity values ​​into multiple color excitation values ​​according to the relative visibility coefficient of the target color temperature. This can fully take into account the photosensitivity of the first photosensitive sensor 210 to the primary color light and avoid introducing errors caused by the photosensitivity of the first photosensitive sensor 210 into the color excitation values, thereby improving the accuracy of the first test value and the second test value.

[0065] In this embodiment of the disclosure, the first calculator 222 calculates the first test value and the second test value based on the tristimulus values ​​XYZ, which can determine the display color of the display panel from the perspective of human eye perception, thereby correcting the display color of the display panel according to the human eye's ability to perceive color temperature.

[0066] In this embodiment, the relative visibility coefficient can be determined based on the display panel in its initial state, which is a display panel that has not yet been calibrated. The first photosensor 210 detects the display screen of the first test image on the initial state display panel at the target color temperature to obtain the initial chromaticity value and the initial photosensitivity values ​​of multiple primary color lights. The first calibrator 230 can determine the relative visibility coefficient of each of the multiple primary color lights based on the initial photosensitivity value and the initial chromaticity value.

[0067] Figure 3 is a schematic diagram of a correction device according to another embodiment of the present disclosure. The method for determining the relative visibility coefficient is illustrated in conjunction with Figure 3.

[0068] As shown in Figure 3, the calibration device 300 includes a first photosensor 310 and a first calibrator 530. The first calibrator 330 includes a second calibrator 333. The first photosensor 310 is similar to the first photosensor 110 described above, and will not be described again for the sake of simplicity.

[0069] In this embodiment of the disclosure, the second calculator 333 calculates the relative visibility coefficient of each of the multiple primary color lights based on the initial photosensitivity value and the initial chromaticity values ​​of the multiple primary color lights. The initial chromaticity value and the initial photosensitivity value are obtained by the first photosensor 310 detecting the display screen of the first test image in the initialized state at the target color temperature.

[0070] For example, under the detection of a color temperature detection device, a first test image is displayed on a display panel in an initialized state, at which time the first display screen is a white screen. The color temperature detection device can detect the current display color temperature of the display panel. For example, when the target color temperature is 6500K, the color temperature detection device detects whether the current display color temperature of the display panel is 6500K. When the display color temperature is 6500K, the first photosensor 310 performs primary color light detection on the white screen to obtain the initial light sensitivity values ​​of each of the multiple primary color lights. In this case, for the first photosensor 310, the initial light sensitivity values ​​are the standard light sensitivity values ​​of the multiple primary colors corresponding to the target color temperature. The relationship between the display color temperature and the multiple initial light sensitivity values ​​is related to the light sensitivity capability of the first photosensor 310, and the relationship between the display color temperature and the initial light sensitivity values ​​can be represented by the relative visibility coefficients of each of the multiple primary color lights.

[0071] In this embodiment of the disclosure, the initial chromaticity value represents the current display color temperature of the display panel. For example, the current display color temperature of the display panel can be represented in the form of chromaticity coordinates (x', y'). For example, if the target color temperature is 6500K, and the color temperature detection device detects that the current chromaticity coordinate values ​​of the display panel are x' = 0.3137 and y' = 0.3244, then the current display color temperature of the display panel is represented as 6500K using the chromaticity coordinate values ​​x' = 0.3137 and y' = 0.3244.

[0072] Given that the white screen of the display panel satisfies the chromaticity coordinate values ​​x' = 0.3137 and y' = 0.3244, the first photosensor 310 detects the primary color light emitted from the white screen to obtain the initial photosensitivity value of the red primary color. Initial sensitivity of green base color and the initial light sensitivity of blue base color

[0073] In this embodiment of the disclosure, when the initial photosensitivity value is detected by the first photosensor 310 under the gain of the ambient light sensor (ALS), the initial photosensitivity value of the red primary color is based on the ALS gain. Initial sensitivity of green base color and the initial light sensitivity of blue base color Normalization is performed.

[0074] For example, under conditions of limited light sensitivity, the first photosensitive sensor 310 may not be able to accurately acquire the initial light sensitivity value of the red primary color. Initial sensitivity of green base color and the initial light sensitivity of blue base color Therefore, the light-sensing capability of the first photosensitive sensor 310 can be optimized based on ALS gain.

[0075] For example, the light-sensing capability of the first photosensitive sensor 310 is amplified by using ALS gain, and then the detected light-sensing value is normalized by using ALS gain.

[0076] For example, the initial sensitivity value of the red primary color can be determined by the following formula (1). Normalization is performed:

[0077] For example, the initial light sensitivity value of the blue primary color can be determined by the following formula (2). Normalization is performed:

[0078] For example, the initial photosensitivity of the green primary color can be determined by the following formula (3). Normalization is performed:

[0079] R′ W G′ represents the normalized initial sensitivity value of the red primary color. W B′ represents the normalized initial photosensitive value of the green primary color. W ALS Dgain represents the normalized initial sensitivity value of the blue primary color, ALS Again represents the digital gain of ALS, and ALS Again represents the analog gain of ALS.

[0080] In this embodiment of the disclosure, the chromaticity coordinate value x' in the initial chromaticity value is related to the red primary color, and the chromaticity coordinate value y' in the initial chromaticity value is related to the blue primary color. Therefore, the normalized initial photosensitivity value R′ based on the red primary color is... W Normalized initial sensitivity value G′ of green primary color W Based on the chromaticity coordinate values ​​x' and y' of the initial chromaticity values, the relative visual sensitivity coefficient of the red primary color relative to the green primary color is determined, and the normalized initial photosensitive value B' of the blue primary color is used. W Normalized initial sensitivity value G′ of green primary color W The relative visibility coefficient of the blue primary color relative to the green primary color is determined by using the chromaticity coordinate value x' and the chromaticity coordinate value y' in the initial chromaticity value.

[0081] For example, the relative visibility coefficient of the red primary color can be calculated using the following formula (4).

[0082] For example, the relative visibility coefficient of blue primary color can be calculated using the following formula (5).

[0083] For example, the relative visibility coefficient of the green primary color can be calculated using the following formula (6).

[0084] For visibility coefficient This represents the visibility coefficient of the red primary color relative to the green primary color. This represents the visibility coefficient of the blue primary color relative to the green primary color, with the relative visibility coefficient of the green primary color set to 1.

[0085] For example, with a target color temperature of 6500K, chromaticity coordinate values ​​x' = 0.3137 and y' = 0.3244, the first photosensor 310 detects the initial photosensitivity value of the red primary color. Initial sensitivity of green base color and the initial light sensitivity of blue base color The numbers are 19905, 31135, and 18514 respectively, with ALSDgain being 4 and ALS Again being 2.

[0086] The relative visibility coefficient of the red primary color can be determined using formulas (1), (3), and (4). The relative visibility coefficient of the blue primary color is 1.356. This can be determined using formulas (2), (3), and (5). The relative visibility coefficient of the green primary color is 1.507, which can be determined using formula (6). The value is 1.

[0087] In this embodiment of the disclosure, when determining the relative visibility coefficient Relative visibility coefficient and relative visibility coefficient Then, the relative visibility coefficient can be... Relative visibility coefficient and relative visibility coefficient The data is stored in the first calibrator 330. During the process of calibrating the display color temperature, when the first calibrator 330 determines the first test value and the second test value based on multiple first test photosensitivity values, it can directly read the relative visibility coefficient. Relative visibility coefficient and relative visibility coefficient

[0088] Referring back to Figure 2, to ensure that the relative visibility coefficient accurately characterizes the light sensitivity of the first photosensitive sensor 210, the ALS gain used in determining the relative visibility coefficient is the same as the ALS gain used in color temperature calibration. Therefore, during the calibration process, the first photosensitive sensor 210 detects the test sensitivity value of the red primary color. Test sensitivity value of green base color Test sensitivity values ​​for blue base color The primary color converter 221 measures the photosensitive value of the red primary color based on formulas (1), (2), and (3). Test sensitivity value of green base color Test sensitivity values ​​for blue base color Normalization was performed to obtain the normalized test sensitivity value R for the red primary color. W Normalized photosensitive value G for green base color W Normalized test sensitivity value B for blue primary color W .

[0089] In this embodiment of the disclosure, the relative visibility coefficient is used. The primary color converter 221 converts the photosensitive value of each primary color light into the degree of human eye perception of the primary color light, obtaining the tristimulus values ​​XYZ. Due to the relative visual acuity coefficient... The light-sensing capability of the first photosensitive sensor 210 can be characterized by the relative visual acuity coefficient. Converting the photosensitivity of the primary color light into tristimulus values ​​XYZ can minimize errors caused by the photosensitivity of the first photosensor 210.

[0090] For example, using the following formula (7), the primary color converter 221 converts multiple normalized test photosensitivity values ​​into tristimulus values ​​XYZ respectively:

[0091] Using the following formula (8), the first calculator 222 calculates the first test value and the second test value based on the color excitation values ​​XYZ:

[0092] For example, the first test value is the test chromaticity coordinate value y determined based on the display color temperature, and the second test value is the test chromaticity coordinate value x determined based on the display color temperature.

[0093] In this embodiment of the disclosure, since the test chromaticity coordinate value x and the test chromaticity coordinate value y represent the display color temperature, the display color temperature can be corrected based on the test chromaticity coordinate value x and the test chromaticity coordinate value y until the difference between the display color temperature and the target color temperature meets the color temperature display conditions.

[0094] For example, it will display the test chromaticity coordinates (x, y) corresponding to the displayed color temperature and the standard chromaticity coordinates (x, y) corresponding to the target color temperature. spec y spec By comparing the two colors, the primary color light that needs to be adjusted in terms of display intensity can be determined.

[0095] In this embodiment, the first adjuster 231 adjusts a first gain value Bgain based on the difference between a first standard value and a first test value, such that the difference between the first standard value and the first test value is less than or equal to a first threshold, wherein the first gain value Bgain is used to correct the first primary color in the display color temperature. In response to the difference between the first standard value and the first test value being less than or equal to the first threshold, the second adjuster 232 adjusts a second gain value Rgain based on the difference between a second standard value and a second test value, such that the difference between the second standard value and the second test value is less than or equal to a second threshold, wherein the second gain value is used to correct the second primary color in the display color temperature. The color temperature correction data includes the adjusted first gain value Bgain and the adjusted second gain value Rgain.

[0096] In this embodiment of the disclosure, the first standard value is the chromaticity coordinate value x corresponding to the target color temperature. spec The second standard value is the chromaticity coordinate value Y corresponding to the target color temperature. spec The first and second test values ​​are the test chromaticity coordinate values ​​y and x, respectively, determined by the first calculator 222 based on formula (8). To minimize errors that may be caused by the first sensor 210, the standard chromaticity coordinates (x) corresponding to the target color temperature are... spec y spec It is consistent with the initial chromaticity value.

[0097] For example, when the target color temperature is 6500K, and the initial chromaticity value corresponds to the chromaticity coordinates x' = 0.3137 and y' = 0.3244, the standard chromaticity coordinates x' corresponding to the target color temperature are... spec =0.3137, the standard chromaticity coordinate value y corresponding to the target color temperature. spec =0.3244.

[0098] In this embodiment of the disclosure, if the standard chromaticity coordinate value y spec The difference between the test chromaticity coordinate value y and the value y is greater than the first threshold y. thr The first adjuster 231 adjusts the first gain value Bgain to correct the display panel's display level of blue primary color. For example, if yy spec >y thr The first adjuster 231 increases the first gain value Bgain to enhance the display panel's rendering of the blue primary color. If yy spec <-y thr The first adjuster 231 reduces the first gain value Bgain to reduce the display panel's emphasis on the blue primary color. If -y thr ≤yy spec ≤y thr The first adjuster 231 does not need to adjust the first gain value Bgain.

[0099] After the first adjuster 231 adjusts the first gain value Bgain, multiple test light sensitivity values ​​need to be acquired again by the first photosensor 210. This allows the current display color temperature of the first display screen after the first gain value has been adjusted to be determined. The first calculator 222 then determines the current first test value based on the current display color temperature. If the difference between the current first test value and the first standard value is less than or equal to the first threshold, the adjustment of the first gain value can be considered complete.

[0100] For example, during the adjustment of the first gain value Bgain, the first adjuster 231 can be based on the standard chromaticity coordinate value y. spec The difference between the standard chromaticity coordinate value y and the test chromaticity coordinate value y is used to directly calculate the magnitude of the first gain value Bgain. For example, the standard chromaticity coordinate value y can be predetermined. spec The first adjuster 231 calculates the adjustment range based on the ratio and the difference between the test chromaticity coordinate value y and the adjustment range of the first gain value Bgain. Thus, during the adjustment of the first gain value Bgain, the first adjuster 231 calculates the adjustment range based on the ratio and the difference. This allows the difference between the current first test value and the first standard value to be less than or equal to the first threshold value with a small number of adjustments, thereby increasing the adjustment rate.

[0101] For example, during the adjustment of the first gain value Bgain, the first adjuster 231 can be based on the standard chromaticity coordinate value y. spec The difference between the test chromaticity coordinate value y and the first test value is used to gradually adjust the first gain value Bgain by a fixed adjustment increment. For example, the first gain value Bgain can be adjusted by an increment of 1. After each adjustment of the first gain value Bgain, the first photosensitive sensor 210, the first converter 220, and the first corrector 230 re-determine the current first test value. If the difference between the current first test value and the first standard value is greater than a first threshold, the first adjuster 231 continues to gradually adjust the first gain value Bgain by an increment of 1 until the difference between the current first test value and the first standard value is less than or equal to the first threshold, which can improve the accuracy of the adjustment.

[0102] In this embodiment of the disclosure, in response to -y thr ≤yy spec ≤y thr The second adjuster 232 is based on the second standard value x. spec The difference between the second test value x and the second gain value x is used to adjust the second gain value Rgain.

[0103] In this embodiment of the disclosure, if the standard chromaticity coordinate value x spec The difference between the test chromaticity coordinate value x and the second threshold x is greater than the second threshold x. thrThe second adjuster 232 adjusts the second gain value Rgain to correct the display panel's rendering of the red primary color. For example, if xx spec >x thr The second adjuster 232 increases the second gain value Rgain to enhance the display panel's rendering of the red primary color. If xx spec <-x thr The second adjuster 232 reduces the second gain value Rgain to reduce the display panel's emphasis on the red primary color. If -x thr ≤xx spec ≤x thr The second adjuster 232 does not need to adjust the second gain value Rgain.

[0104] The process of adjusting the second gain value Rgain is similar to that of adjusting the first gain value Bgain, and can be based on the standard chromaticity coordinate value x. spec The difference between the test chromaticity coordinate value x and the value x is used to calculate the magnitude of the second gain value Rgain in order to reduce the number of adjustments. Alternatively, the second gain value Rgain can be adjusted gradually with a fixed adjustment magnitude.

[0105] During the adjustment of the second gain value Rgain, multiple test photosensitivity values ​​need to be acquired again by the first photosensor 210 to determine the current display color temperature of the first display screen after the second gain value Rgain is adjusted. Based on the current display color temperature, the first calculator 222 redetermines the current first test value and the current second test value. If the difference between the current first test value and the first standard value is less than or equal to the first threshold and the difference between the current second test value and the second standard value is less than or equal to the second threshold, the second adjuster 232 can be considered to have completed the adjustment of the second gain value Rgain. If the difference between the current first test value and the first standard value is greater than the first threshold, the first adjuster 231 readjusts the first gain value Bgain until the difference between the current first test value and the first standard value is less than or equal to the second threshold, then the second adjuster 232 readjusts the second gain value Rgain. If the difference between the current first test value and the first standard value is less than or equal to the first threshold and the difference between the current second test value and the second standard value is greater than the second threshold, the second adjuster 232 adjusts the second gain value Rgain.

[0106] In some embodiments, the first test value and the second test value may also be used to determine chromaticity coordinates (u', v') based on a plurality of first test photosensitivity values.

[0107] For example, using the following formula (9), the primary color converter 221 determines the first test value and the second test value based on the color excitation values ​​XYZ:

[0108] For example, the first test value is the test chromaticity coordinate value v' determined based on the display color temperature, and the second test value is the test chromaticity coordinate value u' determined based on the display color temperature.

[0109] In this embodiment of the disclosure, since the test chromaticity coordinate value v' and the test chromaticity coordinate value u' represent the display color temperature, the display color temperature can be corrected based on the test chromaticity coordinate value v' and the test chromaticity coordinate value u' until the difference between the display color temperature and the target color temperature meets the color temperature display conditions.

[0110] For example, the test chromaticity coordinates (u', v') corresponding to the displayed color temperature will be compared with the standard chromaticity coordinates (u', v') corresponding to the target color temperature. spec ,v' spec By comparing the values, the primary color light that needs to be adjusted in display intensity is determined. Standard chromaticity coordinates (u') spec ,v' spec It can be obtained from the target color temperature or from the standard chromaticity coordinates (x). spec y spec (This is obtained through conversion.)

[0111] In this embodiment of the disclosure, the first adjuster 231 first adjusts based on the standard chromaticity coordinate value v' spec The difference between the measured chromaticity coordinate value v' and the standard chromaticity coordinate value v' is used to adjust the first gain value Bgain to correct the display panel's rendering of the blue primary color. spec The difference between the test chromaticity coordinate value v' and the threshold v' is less than or equal to the threshold v'. thr Based on standard chromaticity coordinate values ​​u' spec The second adjuster 232 adjusts the second gain value Rgain based on the difference between the test chromaticity coordinate value u' and the value, in order to correct the display panel's display level of the red primary color.

[0112] The process of adjusting the first gain value Bgain and the second gain value Rgain based on the test chromaticity coordinates (u', v') is similar to the process of adjusting the first gain value Bgain and the second gain value Rgain based on the test chromaticity coordinates (x, y). For the sake of simplicity, it will not be elaborated here.

[0113] In this embodiment, the adjustment of the first gain value Bgain by the second adjuster 232 based on the second test value has a relatively small impact on the change of the first test value. Therefore, after the first adjuster 231 adjusts the first gain value Bgain based on the first test value, the second adjuster 232 then adjusts the second gain value Rgain based on the second test value. During the process of the second adjuster 232 adjusting the second gain value Rgain, the first calculator 222 needs to synchronously determine the current first test value based on the current display color temperature to avoid a large deviation between the first standard value and the current first test value after the second adjuster 232 adjusts the second gain value Rgain.

[0114] In this embodiment of the disclosure, the color temperature display conditions may further indicate a first test value, a first standard value, and a threshold v'. thr The relationship between them, the second test value, the second standard value, and the threshold u' thr The relationship between them, the threshold v' thr and threshold u' thr The value of the threshold v'. thr and threshold u' thr The specific data is determined based on standardized displays of medical diagnostic monitors, for example, the threshold v' thr =threshold u' thr =0.01, this disclosure specifies the threshold v' thr and threshold u' thr The value is not limited.

[0115] Figure 4 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure.

[0116] As shown in Figure 4, the calibration device 400 includes a first photosensor 410, a first converter 420, and a first calibrator 430. The first calibrator 430 includes a first adjuster 431, a second adjuster 432, and a third adjuster 434.

[0117] In this embodiment, the first photosensitive sensor 210 and the first converter 420 are similar to the first photosensitive sensor 110 and the first converter 120 described above, respectively, and the first adjuster 431 and the second adjuster 432 are similar to the first adjuster 231 and the second adjuster 232 described above, respectively. For the sake of brevity, they will not be described again.

[0118] In this embodiment of the disclosure, when it is determined that the adjusted first gain value is equal to the correction threshold and the difference between the first standard value and the first test value is greater than the first threshold, the third adjuster 434 adjusts the third gain value Ggain, which is used to correct the third primary color of the display color temperature indication.

[0119] For example, the adjustable range of the first gain value Bgain can be consistent with the range of pixel values. For example, the adjustable range of the first gain value Bgain is [0, 255], and the correction threshold of the first gain value Bgain is 0 and 255. For example, when the first gain value Bgain is increased to 255 and yy spec >y thr In this case, the third adjuster 434 reduces the third gain value Ggain. The third gain value Ggain is used to correct the green primary color of the display color temperature indicator. By reducing the third gain value Ggain, the color rendering intensity of the green primary color in the displayed image can be reduced, thereby enhancing the display intensity of the blue primary color.

[0120] In this embodiment of the disclosure, when it is determined that the adjusted second gain value Rgain is equal to the correction threshold and the difference between the second standard value and the second test value is greater than the second threshold, the first adjuster 431 adjusts the first gain value Bgain.

[0121] For example, the adjustable range of the second gain value Rgain can be consistent with the range of pixel values. For example, the adjustable range of the second gain value Rgain is [0, 255], and the correction threshold of the second gain value Rgain is 0 and 255. For example, when increasing the second gain value Rgain to 255 and xx... spec >x thr In this case, the first adjuster 431 reduces the first gain value Bgain. By reducing the first gain value Bgain, the color rendering intensity of the blue primary color in the displayed image can be reduced, thereby achieving the effect of enhancing the display intensity of the red primary color.

[0122] During the adjustment of the second gain value Rgain, multiple test photosensitivity values ​​need to be acquired again by the first photosensor 410 to determine the current display color temperature of the first display screen after the second gain value Rgain is adjusted. Based on the current display color temperature, the first converter 420 re-determines the current first test value and the current second test value. If the difference between the current first test value and the first standard value is less than or equal to the first threshold and the difference between the current second test value and the second standard value is less than or equal to the second threshold, the second adjuster 432 can be considered to have completed the adjustment of the second gain value Rgain. If the difference between the current first test value and the first standard value is greater than the first threshold, the first adjuster 431 readjusts the first gain value Bgain and the third adjuster 434 readjusts the third gain value Ggain until the difference between the current first test value and the first standard value is less than or equal to the second threshold, at which point the second adjuster 432 readjusts the second gain value Rgain. If the difference between the current first test and the first standard value is less than or equal to the first threshold and the difference between the current second test and the second standard value is greater than the second threshold, the second adjuster 432 adjusts the second gain value Rgain.

[0123] In this embodiment, based on the adjusted first gain value Bgain, the adjusted second gain value Rgain, and the adjusted third gain value Ggain, the difference between the actual color temperature of the first display image displayed by the display panel for the first test image at the target color temperature and the target display color temperature satisfies the color temperature display conditions. The color temperature display conditions can indicate the first test value, the first standard value, and the first threshold y. thr The relationship between them, the second test value, the second standard value, and the second threshold x thr The relationship between them, the first threshold y thr Second threshold x thr The value of y. First threshold y thr Second threshold x thr The specific data is determined based on standardized displays of medical diagnostic monitors, for example, the first threshold y. thr =Second threshold x thr =0.01, this disclosure applies to the first threshold y thr Second threshold x thr The value is not limited.

[0124] In this embodiment of the disclosure, based on the standard chromaticity coordinate value v' spec During the adjustment of the first gain value Bgain based on the difference between the test chromaticity coordinate value v' and the standard chromaticity coordinate value v', the third adjuster 434 can also adjust the third gain value Ggain. specDuring the process of adjusting the second gain value Rgain by the difference between the test chromaticity coordinate value v' and the second gain value Rgain, the first adjuster 431 can also adjust the first gain value Bgain.

[0125] The process of adjusting the first gain value Bgain, the second gain value Rgain, and the third gain value Ggain based on the test chromaticity coordinates (u', v') is similar to the process of adjusting the first gain value Bgain, the second gain value Rgain, and the third gain value Ggain based on the test chromaticity coordinates (x, y). For simplicity, it will not be elaborated here.

[0126] Figure 5 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure.

[0127] As shown in Figure 5, the calibration device 500 includes a first photosensor 510, a first converter 520, and a first corrector 530. The first converter 520 includes a first generator 523 and a second generator 524, and the first corrector 530 includes a first adjuster 531 and a second adjuster 532.

[0128] In this embodiment, the first photosensor 510 is similar to the first photosensor 110 described above, and will not be repeated for the sake of brevity.

[0129] In this embodiment of the disclosure, the first generator 523 determines a first test value based on the ratio of the test sensitivity value of the first primary color to the test sensitivity value of the third primary color among a plurality of test sensitivity values. The second generator 524 determines a second test value based on the ratio of the test sensitivity value of the second primary color to the test sensitivity value of the third primary color among a plurality of test sensitivity values.

[0130] In this embodiment of the disclosure, the first generator 523 and the second generator 524 directly determine the difference between the display color temperature and the target color temperature based on the test photosensitivity values ​​of multiple primary color lights, thereby adjusting the first adjustment unit 531 and the second adjustment unit 532 to adjust the first gain value Bgain and the second gain value Rgain.

[0131] For example, the ratio of the test sensitivity values ​​of blue and red primary colors to the test sensitivity value of green primary colors determines the first test value and the second test value.

[0132] For example, using the following formula (10), the first generator 523 and the second generator 524 determine the first test value and the second test value based on multiple test photosensitivity values:

[0133] For example, the first test value is the relative value K of the test sensitivity of blue primary color and the test sensitivity of green primary color. B / g The second test value is the relative value K between the test sensitivity of the red primary color and the test sensitivity of the green primary color. R / G .

[0134] In this embodiment of the disclosure, the display intensity of multiple primary color lights in the displayed image is characterized by multiple test photosensitivity values, and the display color temperature is corrected based on the ratio between the test photosensitivity values ​​of the primary color lights. For example, the relative value K is used. B / G and relative value K R / G Relative values ​​K to the standard respectively specB / G and standard relative value K specR / G By comparing the two colors, we can determine the primary color light that needs to be adjusted in terms of display intensity.

[0135] In this embodiment of the disclosure, the standard relative value K specB / G and standard relative value K specR / G It can be a normalized initial photosensitivity value R′ based on the red primary color. W Normalized initial sensitivity value G′ of green primary color W Normalized initial sensitivity value B′ of blue primary color W Determined. For example, the normalized initial photosensitivity value B′ based on the blue primary color. W Normalized initial sensitivity value G′ of green primary color W The ratio determines the standard relative value K specB / G Normalized initial photosensitivity R′ based on red primary color W Normalized initial sensitivity value G′ of green primary color W The ratio determines the standard relative value K specR / G .

[0136] In this embodiment of the disclosure, the standard relative value K is first used as the basis. specB / G With relative value K B / G The difference between the two values ​​is used to adjust the first gain value Bgain to correct the display panel's rendering of the blue primary color. For example, if the standard relative value K... specB / G With relative value K B / G The difference between them is greater than the threshold K thrB / G The first adjuster 531 adjusts the first gain value Bgain to correct the display panel's display level of blue primary color.

[0137] For example, if K B / G -K specB / G >K thrB / G The first adjuster 531 increases the first gain value Bgain to enhance the display panel's rendering of the blue primary color. If K B / G -K specB / G <-K thrB / G The first adjuster 531 reduces the first gain value Bgain to reduce the display panel's emphasis on the blue primary color. If -K thrB / G ≤K B / G -K specB / G ≤K thrB / GThe first adjuster 531 does not require adjustment of the first gain value Bgain.

[0138] Determining the standard relative value K specB / G With relative value K B / G The difference between them is less than or equal to the threshold K thrB / G Based on the standard relative value K specR / G With relative value K R / G The difference between the two values ​​is used by the second adjuster 532 to adjust the second gain value Rgain to correct the display panel's display level of the red primary color.

[0139] For example, if K R / G -K specR / G >K thrR / G The second adjuster 532 increases the second gain value Rgain to enhance the display panel's rendering of the blue primary color. If K R / G -K specR / G <-K thrR / G The second adjuster 532 reduces the second gain value Rgain to reduce the display panel's emphasis on the blue primary color. If -K thrR / G ≤K R / G -K specR / G ≤K thrR / G The second adjuster 532 does not require adjustment of the second gain value Rgain.

[0140] In this embodiment of the disclosure, the first corrector 530 further includes a third adjuster (not shown). The third adjuster adjusts a third gain value Ggain.

[0141] Based on the relative value K B / G and relative value K R / G The process of adjusting the first gain value Bgain, the second gain value Rgain, and the third gain value Ggain is similar to the process of adjusting the first gain value Bgain, the second gain value Rgain, and the third gain value Ggain based on the test chromaticity coordinates (x, y). For the sake of simplicity, it will not be described in detail here.

[0142] In this embodiment of the disclosure, the color temperature display conditions may further indicate a first test value, a first standard value, and a threshold K. thrB / G The relationship between them, the second test value, the second standard value, and the threshold K thrR / G The relationship between them, threshold K thrB / Gr and threshold K thrR / G The value of threshold K. thrB / Gr and threshold K thrR / G The specific data is determined based on standardized displays of medical diagnostic monitors, for example, the threshold K. thrB / Gr and threshold K thrR / G =100, this disclosure pertains to the threshold v'thr and threshold u' thr The value is not limited.

[0143] Figure 6 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure.

[0144] As shown in Figure 6, the calibration device 600 includes a first photosensitive sensor 610, a first converter 620, a first calibrator 630, a second converter 640, and a second calibrator 650.

[0145] In this embodiment, the first photosensitive sensor 610, the first converter 620, and the first corrector 630 are similar to the first photosensitive sensor 110, the first converter 120, and the first corrector 130 described above, and will not be repeated for the sake of brevity.

[0146] In this embodiment of the disclosure, in response to the difference between the corrected display color temperature and the target color temperature satisfying the target display condition, the second converter 640 converts multiple test photosensitivity values ​​into a third test value, which characterizes the display brightness of the first display screen. The second corrector 650 corrects the third test value to obtain brightness correction data. The brightness correction data is used to correct the display brightness of the first display screen. The display brightness of the first display screen after correction based on the brightness correction data is the corrected display brightness, and the difference between the corrected display brightness and the target brightness satisfies the brightness display condition.

[0147] In this embodiment, the second corrector 650 can also correct the actual display brightness of the first display screen based on multiple test photosensitivity values. For example, the display brightness is the actual brightness when the display panel displays the first display screen, and the second corrector 650 can determine the actual brightness of the first display screen at the target color temperature based on multiple test photosensitivity values. The target brightness is related to the target color temperature; for example, the target brightness can be determined when determining the initial chromaticity values. For example, if it is determined that the white screen of the display panel satisfies the chromaticity coordinate values ​​x' = 0.3137 and y' = 0.3244, and the current display brightness of the white screen is detected as the target brightness, then the target brightness corresponding to the target color temperature of 6500K can be determined.

[0148] When the difference between the actual brightness and the target brightness when the display panel displays the first display image meets the brightness display condition, the brightness display capability of the display panel reaches the standard display capability. For example, the brightness display condition can be that the difference between the actual brightness and the target brightness is less than a preset value, which can be 10%. This disclosure does not limit the value of the preset value. For example, the preset value of the brightness display condition indication can be determined based on the standardized display of medical diagnostic displays.

[0149] In this embodiment, the first corrector 630 first corrects the display color temperature of the first display screen based on the first test value and the second test value. When it is determined that the difference between the display color temperature and the target color temperature is less than the color temperature display condition, the second corrector 650 then corrects the display brightness based on the third test value.

[0150] The adjustment of the display panel's color temperature by the first calibrator 630 significantly affects the display panel's brightness, while the adjustment of the display panel's brightness by the second calibrator 650 has a smaller impact on the display panel's color temperature. Therefore, the first calibrator 630 first calibrates the display panel's color temperature based on the first and second test values ​​until the display panel's color temperature reaches the expected level. After the display panel's color temperature reaches the expected level, the second calibrator 650 then calibrates the display panel's brightness based on the third test value until the display panel's brightness reaches the expected level. This ensures that the second calibrator 650's brightness calibration does not adversely affect the display panel's color temperature, thereby optimizing the calibration process and improving calibration efficiency.

[0151] In this embodiment of the disclosure, the third test value can be determined based on the luminance values ​​corresponding to multiple primary color lights. The second converter 640 converts multiple test photosensitivity values ​​into the third test value according to the luminance excitation coefficient of the target color temperature.

[0152] In this embodiment, the brightness excitation coefficient characterizes the relationship between multiple primary color lights and the display brightness. The brightness excitation coefficient is related to the brightness detection capability of the first photosensitive sensor 620 for the primary color lights, and the brightness excitation coefficient can be predetermined. The second corrector 650 tests the light sensitivity capability of the first photosensitive sensor 620 for different target color temperatures and determines the brightness excitation coefficient corresponding to each of the multiple target color temperatures. In the subsequent process of correcting the brightness deviation of the display panel for a certain target brightness, the second converter 640 can directly determine the third test value based on the brightness excitation coefficient without having to redetermine the brightness excitation coefficient.

[0153] In this embodiment of the disclosure, multiple first test photosensitivity values ​​are converted into third test values ​​according to the luminance excitation coefficient of the target luminance. This can fully take into account the photosensitivity of the first photosensor 610 to the display luminance of the primary color light, and avoid introducing errors caused by the photosensitivity of the first photosensor 610 into the third test values, thereby improving the accuracy of the third test values.

[0154] Figure 7 is a schematic diagram of a correction device according to another embodiment of the present disclosure. The method for determining the luminance excitation coefficient is illustrated in conjunction with Figure 7.

[0155] As shown in Figure 7, the calibration device 700 includes a first photosensor 710 and a second calibrator 750. The second calibrator 750 includes a third calibrator 751. The first photosensor 710 is similar to the first photosensor 110 described above, and will not be repeated for the sake of simplicity.

[0156] In this embodiment, the brightness excitation coefficient can be determined based on the display panel in its initial state. The first photosensor 710 detects the display screen of the first test image at the target color temperature on the initial state display panel, obtaining the initial photosensitivity values ​​and initial brightness values ​​of multiple primary color lights. The third calculator 751 calculates the brightness excitation coefficient for each of the multiple primary color lights based on their initial photosensitivity and initial brightness values.

[0157] For example, under the detection of a brightness detection device, a first test image is displayed on a display panel in an initialized state, at which point the first display image is a white screen. The brightness detection device can detect the display brightness when the display color temperature of the display panel is the target display color temperature. For example, when the display color temperature is 6500K, the current display brightness of the display panel is detected by the brightness detection device, and the current display brightness is the target brightness.

[0158] In this embodiment of the disclosure, when the display color temperature is 6500K, and the display panel in the initial state displays a red image (255, 0, 0), a green image (0, 255, 0), and a blue image (0, 0, 255), the brightness of the primary colors of the red, blue, and green images is detected using a brightness detection device. The brightness of the primary colors can be used to describe the relationship between the brightness of the multiple primary colors. For example, when the display color temperature is 6500K, the first photosensor 710 detects the primary colors of the white image to obtain the initial photosensitivity values ​​of the multiple primary colors. The relationship between the brightness of the primary colors and the initial photosensitivity values ​​can be represented by the brightness excitation coefficients of the multiple primary colors.

[0159] For example, the third calculator 751 can use the following formula (11) to determine the luminance excitation coefficient k of the red primary color. LR :

[0160] For example, the third calculator 751 can use the following formula (12) to calculate the luminance excitation coefficient k of the blue primary color. LG :

[0161] For example, the third calculator 751 can use the following formula (13) to determine the luminance excitation coefficient k of the green primary color. LB :

[0162] L′ R L′ represents the display brightness of the primary color detected in the red image.B L′ represents the display brightness of the primary colors detected by the blue screen. G This indicates the brightness of the primary color detected for the green screen.

[0163] Referring back to Figure 6, during the brightness correction process, the second converter 640 uses a brightness excitation coefficient to convert the photosensitive value of each primary color light into a brightness test value. Based on the brightness test value of each primary color light, a third test value is determined, which characterizes the display brightness of the white screen. Since the brightness excitation coefficient can characterize the photosensitive capability of the first photosensitive sensor 610, using the brightness excitation coefficient to determine the third test value of the primary color light can minimize errors caused by the photosensitive capability of the first photosensitive sensor 610.

[0164] Determining the brightness excitation coefficient k LR Brightness excitation coefficient k LG and brightness excitation coefficient k LB Then, the brightness excitation coefficient k can be... LR Brightness excitation coefficient k LG and brightness excitation coefficient k LB The value is stored in the second corrector 650. During the process of correcting the display color temperature, when the second corrector 650 determines the third test value based on multiple first test photosensitivity values, it can directly read the luminance excitation coefficient k. LR Brightness excitation coefficient k LG and brightness excitation coefficient k LB .

[0165] For example, the second converter 640 converts multiple normalized test photosensitivity values ​​into luminance test values ​​using the following formula (14):

[0166] The second converter 640 determines the third test value based on the brightness test value using the following formula (15): L = L R +L G +L B (15)

[0167] For example, the third test value is the display brightness L, determined by the sum of brightness test values ​​of multiple primary color lights. R L represents the display brightness of the red primary color. B Indicates the display brightness of the blue primary color, L G This indicates the display brightness of the green primary color.

[0168] In this embodiment, the second corrector 650 corrects the third test value based on the difference between the target brightness and the display brightness represented by the third test value, thereby correcting the brightness of the displayed image. The target brightness can be the display brightness detected for a white screen of the display panel in its initial state at a target color temperature. For example, when the display color temperature is 6500K, the display brightness of the white screen of the display panel is detected by a brightness detection device, and the detected display brightness is the target brightness L. spec .

[0169] In this embodiment of the disclosure, if the target brightness L spec The difference between the brightness and the display brightness L is greater than the threshold L. thr A second corrector 650 is needed to adjust the pulse-width modulation (PWM) signal to correct the display panel's brightness. For example, if LL... spec >L thr The second corrector 650 increases the duty cycle of the PWM signal to enhance the display brightness of the display panel. If LL spec <-L thr The second corrector 650 reduces the duty cycle of the PWM signal to decrease the display brightness of the display panel. If -L thr ≤LL spec ≤L thr The second corrector 650 does not require adjustment of the duty cycle of the PWM signal.

[0170] In some embodiments, if based on the relative value K B / G and relative value K R / G The second corrector 650 can correct the display brightness based on the photosensitive value of the green primary color to correct the display color temperature.

[0171] For example, if the normalized test sensitivity value G of the green primary color... W Compared to the standard sensitivity value G of green base color Wspec The difference between them is greater than the threshold G Wthr The second corrector 650 adjusts the PWM signal to correct the display panel's brightness. For example, if G... W -G Wspec >G Wthr The second corrector 650 increases the duty cycle of the PWM signal to enhance the display brightness of the display panel. If G W -G Wspec <-G Wthr The second corrector 650 reduces the duty cycle of the PWM signal to decrease the display brightness of the display panel. If -G Wthr ≤G W -G Wspec ≤G WthrThe second corrector 650 does not require adjustment of the PWM signal duty cycle. The standard sensitivity value G for green primary color. Wspec It can be the normalized initial photosensitive value G′ of the green primary color. W .

[0172] In some embodiments, the first photosensor 610, in response to the difference between the corrected display color temperature and the target color temperature satisfying the color temperature display condition, performs primary color light detection on the second display screen displayed on the display panel for the second test image, obtaining multiple second test photosensitivity values. The first converter 620 determines the color temperature deviation based on the multiple second test photosensitivity values. The first corrector 630 sets a gamma curve based on the color temperature correction data and the color temperature deviation, the gamma curve indicating the relationship between the display brightness of the display screen and the grayscale image color rendering effect.

[0173] In this embodiment, the second test image can be a grayscale image, based on which the color temperature correction data can be verified. For a liquid crystal display, the inflection point of the curve showing the change in color temperature with the pixel values ​​of the displayed image is below L35, where L35 represents the pixel values ​​of the displayed image as (35, 35, 35). Furthermore, to determine the reduction of chromaticity deviation in the grayscale image, the pixel values ​​of the second test image need to be less than 127; therefore, the range of pixel values ​​for the second test image can be [35, 127]. For example, the pixel values ​​of the second test image are all (63, 63, 63).

[0174] In this embodiment, the display panel displays a second test image and controls the first photosensor 610 to perform primary color light detection on the second display screen to obtain multiple second test photosensitivity values. The first converter 620 normalizes the multiple second test photosensitivity values ​​using formulas (1), (2), and (3), and determines the chromaticity coordinates (x, y) using formulas (7), (8), and the normalized photosensitivity values. The display chromaticity of the second display screen can be verified based on the chromaticity coordinates and the standard chromaticity coordinates. The first converter 620 determines the color temperature deviation based on the difference between the display chromaticity of the second display screen and the target display chromaticity. If the color temperature deviation meets the color temperature display conditions, the color temperature correction process of the display panel can be considered complete. If the color temperature deviation does not meet the color temperature display conditions, the first corrector 630 needs to call the corresponding gamma curve and adjust the display brightness of different grayscale images through the gamma curve to correct the color temperature deviation when the display panel displays grayscale images, thereby reducing the error between the display color temperature and the target color temperature.

[0175] In this embodiment of the disclosure, the display color temperature and display brightness of the display panel are corrected only by using white screen and grayscale screen, which can shorten the correction time and improve the correction efficiency.

[0176] In this embodiment of the disclosure, during the stage of displaying the first test image on the display panel, the first gain value, the second gain value, the third gain value, and the duty cycle of the PWM signal are adjusted to correct the color temperature and brightness. The color temperature correction data may include the adjusted first gain value, the adjusted second gain value, and the adjusted third gain value, and the brightness correction data may include the duty cycle of the PWM signal. The color temperature correction data and the brightness correction data are stored in the first corrector 630, so that in the subsequent display process of the display panel, the image is displayed based on the color temperature correction data and the brightness correction data.

[0177] Figure 8 is a schematic diagram of the structure of a correction device according to another embodiment of the present disclosure.

[0178] As shown in Figure 8, the calibration device 800 includes a first photosensitive sensor 810, a first converter 810, a first calibrator 830, and a second photosensitive sensor 860.

[0179] In this embodiment, the first photosensitive sensor 810, the first converter 810, and the first corrector 830 are similar to the first photosensitive sensor 110, the first converter 110, and the first corrector 130 described above, and will not be repeated for the sake of brevity.

[0180] In this embodiment of the present disclosure, the second photosensor 860 detects the backlight brightness of the display panel and obtains a backlight brightness value. The first calibrator 830 calibrates the display brightness of the display panel based on the backlight brightness value.

[0181] For example, when a monitor is turned on, its backlight brightness gradually decreases. After the first calibrator 830 and the second calibrator respectively correct the display color temperature and brightness, the second photosensor 860 can detect the change in backlight brightness. Based on the amount of backlight brightness decrease detected by the second photosensor 860, the first calibrator 830 can compensate for the amount of backlight brightness decrease by adjusting the backlight brightness of the display panel.

[0182] In this embodiment, the first calibrator 830 can control the calibration device 800 to enter / exit the calibration state and the working state. After entering the calibration state, the first calibrator 830 sends a test image to the display panel, causing the display panel to display the test image. After the display panel displays the test image, the first calibrator 830 controls the first photosensor 810 to perform primary color light detection on the display screen. For example, the first calibrator 830 can control the first photosensor 810 via an Inter-Integrated Circuit (I2C) bus and read multiple test light sensitivity values ​​detected by the first photosensor 810.

[0183] During color temperature correction, the first converter 810 converts multiple test photosensitivity values ​​into multiple excitation values ​​(XYZ). Based on these excitation values, chromaticity coordinates are determined. The first corrector 830 corrects the display color temperature based on the difference between the chromaticity coordinates and the standard chromaticity coordinates. During brightness correction, the first converter 810 and the first corrector 830 convert multiple test photosensitivity values ​​into test brightness values ​​for multiple primary color lights. Based on these brightness values, the display brightness is determined, and the display brightness is corrected based on the difference between the display brightness and the target brightness. During the conversion process, the first converter 810 and the first corrector 830 can also filter the data to improve data accuracy.

[0184] The first calibrator 830 corrects the display color temperature by adjusting the first, second, and third gain values, and corrects the display brightness by adjusting the duty cycle of the PWM signal. The first calibrator 830 stores the adjusted first, second, and third gain values ​​and the adjusted duty cycle of the PWM signal. After adjusting the color temperature and brightness, the first calibrator 830 controls the second photosensor 860 to detect the backlight brightness value, stores the attenuation of the backlight brightness value, and exits the calibration mode. After the first calibrator 830 enters the working state, it displays the image based on the adjusted first, second, and third gain values ​​and the adjusted duty cycle of the PWM signal, and compensates for the attenuation of the backlight brightness value.

[0185] In some embodiments, after completing the correction of the display color temperature and display brightness, the first corrector 830 can also modify the color temperature of the full grayscale image so that the grayscale color deviation of the display panel meets the grayscale color temperature display conditions of the medical display.

[0186] In this embodiment of the disclosure, the red primary color pixel values ​​R and green primary color pixel values ​​G in the look-up table (LUT) are kept unchanged, while the blue primary color pixel value B is subjected to superposition convolution correction. The LUT records the mapping values ​​of the RGB values ​​of the full grayscale image.

[0187] For example, the pixel value B of the blue primary color can be convolved using formula (16):

[0188] N represents the number of bits in the blue primary color pixel value B, where B is the original blue primary color pixel value recorded in the LUT, and B′ is the modified blue primary color pixel value. K can be derived from... Confirmed, CCT 255 The color temperature at L255, CCT n For the color temperature under Ln, CCTn It can be calculated using the color temperature formula. Confirmed. Ln represents the pixel values ​​of the image displayed on the display panel, all of which are (n, n, n), and p is determined by the formula. Sure.

[0189] In this embodiment of the disclosure, the display panel displays images based on the modified blue primary color pixel values, which can reduce the grayscale color deviation of the gray display panel.

[0190] In some embodiments, the calibration device 800 can also periodically calibrate the brightness of the display panel.

[0191] For example, the attenuation of the backlight brightness value detected by the second photosensor 860 during the calibration process is stored as an initial attenuation. Before each brightness calibration of the display panel, the second photosensor 860 can detect the current attenuation of the backlight brightness value of the display panel. If it is determined that the current attenuation is greater than the initial attenuation and the difference between the current attenuation and the initial attenuation is greater than an error threshold, the first calibrator 830 can decrease the duty cycle of the PWM signal. If it is determined that the current attenuation is less than the initial attenuation and the difference between the current attenuation and the initial attenuation is greater than an error threshold, the first calibrator 830 can increase the duty cycle of the PWM signal.

[0192] Figure 9 is a schematic diagram of the structure of a display device according to an embodiment of the present disclosure.

[0193] As shown in Figure 3, the display device 900 includes a calibration device 901 and a display panel 902.

[0194] In this embodiment of the disclosure, the calibration device 301 sets color temperature calibration data. The calibration device 901 may be at least one of the calibration devices 100, 200, 300, 400, 500, 600, and 700 described above. For example, the calibration device 901 determines and sets the color temperature calibration data. The method by which the calibration device 901 determines the color temperature calibration data may refer to the methods described above for determining color temperature calibration data by the calibration devices 100, 200, 300, 400, 500, 600, and 700.

[0195] In this embodiment of the disclosure, the display panel 902 displays the image based on color temperature correction data.

[0196] For example, after the calibration device 901 exits the calibration state, the display panel 902 displays the image based on the color temperature calibration data. The difference between the displayed color temperature and the target color temperature of the image displayed by the display panel 902 based on the color temperature calibration data meets the color temperature display conditions.

[0197] Figure 10 is a schematic diagram of the structure of a display device according to another embodiment of the present disclosure.

[0198] As shown in Figure 10, the display device 1000 includes a calibration device 1001, a display panel 1002, a frame 1003, and a motor assembly 1004.

[0199] In this embodiment, the calibration device 1001 and the display panel 1002 are similar to the calibration device 901 and the display panel 902, respectively, and will not be described in detail for the sake of brevity.

[0200] In this embodiment, a bezel 1003 covers the edge of the display panel 1002, has a cavity within it, and an opening 1031 on the bezel 1003. A motor assembly 1004 is fixedly disposed within the cavity of the bezel 1003, and the motor assembly 1004 includes a sliding assembly 1041. The first photosensitive sensor 1011 of the correction device 1001 is fixedly connected to the sliding assembly 1041, and the sliding assembly 1041 drives the first photosensitive sensor 1011 to pop out of the cavity of the bezel 1003 from the opening 1031 or retract into the cavity of the bezel 1003. The motor assembly 1004 and the correction device 1001 are hidden within the cavity of the bezel 1003, and are therefore represented by dashed boxes in FIG. 10.

[0201] In this embodiment of the disclosure, the correction device 1001 provides a driving voltage to the motor assembly 1004, causing the motor assembly 1004 to control the movement of the sliding assembly 1041. The moving sliding assembly 1011 can control the first photosensitive sensor 1011 to pop out of the opening 1031 into the cavity of the frame 1003 or retract into the cavity of the frame 1003.

[0202] For example, based on the internal structure of the display device 1000, the stroke of the sliding component 1011 and the thrust required to control its movement are determined. For example, after the sliding component 1011 moves this stroke in the direction indicated by the arrow in the figure, the first photosensitive sensor 1011 can completely pop out of the cavity of the frame 1003 from the opening 1031 and perform light detection on the display screen 1002. After the sliding component 1011 moves this stroke in the opposite direction indicated by the arrow in the figure, the first photosensitive sensor 1011 can completely retract from the cavity of the frame 1003 from the opening 1031, and the first photosensitive sensor 1011 can be completely hidden inside the cavity of the frame 1003.

[0203] For example, the thrust required to move the sliding component 1011 can be determined based on the weight of the first photosensitive sensor 1011 and the sliding damping of the sliding component 1041. For example, the stroke can be approximately 15-20 mm, and the thrust can be between 50-200 mN.

[0204] Figure 11 is a schematic diagram of the structure of a motor assembly according to an embodiment of the present disclosure.

[0205] As shown in Figure 11, the motor assembly 1104 includes a sliding assembly 1141, a conductive carrier 1142, and a shielding assembly 1143.

[0206] In this embodiment, a conductive carrier 1142 is fixedly disposed at one end of a sliding assembly 1141, and a first photosensitive element 1111 is fixedly disposed on the conductive carrier 1142. The conductive carrier 1142 is electrically connected to the first photosensitive element 1111, a first converter, and a first calibrator. The conductive carrier 1142 is used to send instructions from the calibrator to the first photosensitive element 1111 to control the first photosensitive element 1111 to perform photosensitivity detection. The calibrator reads the test photosensitivity value detected by the first photosensitive element 1111 through the conductive carrier 1142.

[0207] In this embodiment, the blocking component 1143 is fixedly disposed on the conductive carrier 1142 and surrounds the first photosensitive sensor 1111. When the sliding component 1141 drives the first photosensitive sensor 1111 to retract from the opening of the frame into the cavity, the blocking component 1143 fills the opening, and the opening of the frame is closed, thereby isolating dust and preventing dust from entering the cavity of the frame and affecting data acquisition. The blocking component 1143 can also block ambient light, preventing ambient light from affecting the detection process of the first photosensitive sensor 1111. The blocking component 1143 is fixed on the side of the conductive carrier 1142 facing the display panel, and can play a buffering role during the pop-up and retraction of the first photosensitive sensor 1111 to prevent the first photosensitive sensor 1111 from scratching the display panel.

[0208] Figure 12 is a schematic diagram of the structure of a motor assembly according to an embodiment of the present disclosure.

[0209] As shown in Figure 12, the display device 1200 includes a calibration device 1201, a display panel 1202, a motor assembly 1204, a drive assembly 1205, and a drive circuit 1206. The calibration device 1201 includes a first photosensor 1211, a first converter 1212, a first calibrator 1213, and a second photosensor 1214.

[0210] In this embodiment, the calibration device 1201, display panel 1202, and motor assembly 1204 are similar to the calibration device 1001, display panel 1002, and motor assembly 1004 described above. The first photosensitive sensor 1211, first converter 1212, first corrector 1213, and second photosensitive sensor 1214 are similar to the first photosensitive sensor 210, first converter 820, first corrector 830, and second photosensitive sensor 840 described above, respectively, and will not be described again for the sake of brevity.

[0211] In this embodiment of the disclosure, after entering the calibration state, the first calibrator 1213 provides a driving voltage to the driving component 1205, and the driving component 1205 provides a thrust to the motor component 1204 based on the driving voltage, so that the first photosensitive sensor 1211 can pop out of the frame of the display device 1200.

[0212] The first calibrator 1213 controls the first photosensor 1211 to perform primary color light detection on the display panel 1202 to obtain a test photosensitivity value. The first calibrator 1213 reads the test photosensitivity value and determines color temperature correction data and brightness correction data based on the test photosensitivity value. The first calibrator 1213 also controls the second photosensor 1214 to detect the backlight brightness of the display panel 1202.

[0213] The first corrector 1213 controls the driving circuit 1206 to provide a data driving voltage to the display panel 1206 based on color temperature correction data and brightness correction data, so that the display color temperature and display brightness of the display screen displayed by the display panel 1206 based on the data driving voltage both meet the display conditions.

[0214] In this embodiment of the disclosure, the display device 1200 may further include an indicator light. For example, after entering the calibration state, the indicator light begins to flash rapidly. After exiting the calibration state, the indicator light stops flashing.

[0215] In this embodiment of the disclosure, the display device 1200 may further include multiple buttons. For example, multiple buttons can be used to enter and exit the calibration state, and multiple buttons can also be used to select the target color temperature, etc.

[0216] Figure 13 is a schematic flowchart of a correction method according to an embodiment of the present disclosure.

[0217] As shown in Figure 13, the correction method 1300 may include operations S1310 to S1330.

[0218] In operation S1310, multiple first test light sensitivity values ​​of the display screen of the display panel are acquired. The multiple first test light sensitivity values ​​are obtained by detecting the primary color light of the display screen of the test image at the target color temperature.

[0219] In operation S1320, multiple first test light sensitivity values ​​are converted into first test values ​​and second test values.

[0220] In operation S1330, the first test value and the second test value are corrected sequentially to obtain color temperature correction data.

[0221] In this embodiment of the disclosure, the first test value is related to the first primary color in the display color temperature of the first display screen, and the second test value is related to the second primary color in the display color temperature. The color temperature correction data is used to correct the display color temperature of the first display screen, and the corrected display color temperature of the first display screen is the corrected display color temperature. The difference between the corrected display color temperature and the target color temperature satisfies the color temperature display conditions.

[0222] In this embodiment of the disclosure, operation S1310 is similar to the operation performed by the first photosensor 110 described above, operation S1320 is similar to the operation performed by the first converter 120 described above, and operation S1330 is similar to the operation performed by the first corrector 130 described above, and will not be described again here.

[0223] In this embodiment of the disclosure, operation S1320 converts multiple first test photosensitivity values ​​into first test values ​​and second test values, including: converting multiple first test photosensitivity values ​​into multiple color excitation values ​​according to the relative visibility coefficient of the target color temperature, wherein the relative visibility coefficient characterizes the relationship between multiple primary color lights and the display color temperature; and calculating the first test value and the second test value according to the multiple color excitation values.

[0224] In this embodiment of the disclosure, the correction method 1300 further includes: calculating the relative visual acuity coefficient of each of the multiple primary color lights based on the initial photosensitivity value and the initial chromaticity values ​​of the multiple primary color lights. The initial chromaticity value and the initial photosensitivity value are obtained by detecting the display screen of the first test image at the target color temperature using the display panel in the initial state.

[0225] In this embodiment of the disclosure, operation S1320 converts a plurality of first test photosensitivity values ​​into a first test value and a second test value, including: generating a first test value based on the ratio of the test photosensitivity value of a first primary color to the test photosensitivity value of a third primary color among the plurality of test photosensitivity values; and generating a second test value based on the ratio of the test photosensitivity value of a second primary color to the test photosensitivity value of a third primary color among the plurality of test photosensitivity values.

[0226] In this embodiment of the disclosure, operation S1330 corrects the display color temperature of the display screen based on the first test value and the second test value in sequence to obtain color temperature correction data, including: adjusting a first gain value based on the difference between a first standard value and a first test value so that the difference between the first standard value and the first test value is less than or equal to a first threshold, wherein the first gain value is used to correct the first primary color in the display color temperature; and in response to the difference between the first standard value and the first test value being less than or equal to the first threshold, adjusting a second gain value based on the difference between a second standard value and the second test value so that the difference between the second standard value and the second test value is less than or equal to a second threshold, wherein the second gain value is used to correct the second primary color in the display color temperature; wherein the color temperature correction data includes the adjusted first gain value and the adjusted second gain value.

[0227] In this embodiment of the disclosure, operation S1330 sequentially corrects the first test value and the second test value to obtain color temperature correction data, and further includes: when it is determined that the adjusted first gain value is equal to the correction threshold and the difference between the first standard value and the first test value is greater than the first threshold, adjusting the third gain value, wherein the third gain value is used to correct the third primary color in the display color temperature.

[0228] In this embodiment of the disclosure, operation S1330 sequentially corrects the first test value and the second test value to obtain color temperature correction data, and further includes: adjusting the first gain value when it is determined that the adjusted second gain value is equal to the correction threshold and the difference between the second standard value and the second test value is greater than the second threshold.

[0229] In this embodiment of the disclosure, the correction method 1300 further includes, in response to the difference between the corrected display color temperature and the target color temperature satisfying the color temperature display condition, converting multiple test photosensitivity values ​​into a third test value, the third test value representing the display brightness of the first display screen; and correcting the third test value to obtain brightness correction data, wherein the brightness correction data is used to correct the display brightness of the first display screen, the display brightness of the first display screen after correction based on the brightness correction data is the corrected display brightness, and the difference between the corrected display brightness and the target brightness satisfies the brightness display condition.

[0230] In this embodiment of the disclosure, the correction method 1300 further includes converting multiple test photosensitivity values ​​into a third test value based on the luminance excitation coefficient of the target color temperature; the luminance excitation coefficient characterizes the relationship between multiple primary color lights and display brightness.

[0231] In this embodiment of the disclosure, the correction method 1300 further includes calculating the brightness excitation coefficient of each of the multiple primary color lights based on the initial photosensitivity value and the initial brightness values ​​of the multiple primary color lights; wherein the initial photosensitivity value and the initial brightness value are obtained by detecting the display screen of the first test image on the display panel in the initialization state at the target color temperature.

[0232] In this embodiment of the disclosure, the correction method 1300 further includes, in response to the difference between the corrected display color temperature and the target color temperature satisfying the color temperature display condition, performing primary color light detection on the second display screen of the display panel for the second test image to obtain a plurality of second test light sensitivity values; determining the color temperature deviation based on the plurality of second test light sensitivity values; and setting a gamma curve based on the color temperature correction data and the color temperature deviation, wherein the gamma curve indicates the relationship between the display brightness of the display screen and the grayscale image color rendering effect.

[0233] In this embodiment of the disclosure, the correction method 1300 further includes detecting the backlight brightness of the display panel to obtain a backlight brightness value; and correcting the display brightness of the display panel based on the backlight brightness value.

[0234] Figure 14 is a schematic flowchart of a correction method according to another embodiment of the present disclosure. Figure 14 illustrates a correction method for color temperature correction using chromaticity coordinates (x, y) as the first and second test values.

[0235] As shown in Figure 14, the correction method 1400 may include operations S1401 to S1427.

[0236] In operation S1401, the control display panel displays the first test image at the target color temperature.

[0237] In operation S1402, the first test photosensitivity values ​​Rw, Gw, and Bw are obtained.

[0238] In operation S1403, the first test photosensitivity values ​​Rw, Gw, and Bw are converted into color excitation values ​​XYZ according to the relative visibility coefficient.

[0239] In operation S1404, the color excitation values ​​XYZ are converted into test chromaticity coordinates (x, y).

[0240] In operation S1405, determine yy spec >y thr If yes, then execute operation S1406. If no, then execute operation S1407.

[0241] In operation S1406, determine if the first gain value Bgain = 255. If yes, proceed to operation S1408. If no, proceed to operation S1409.

[0242] In operation S1407, determine yy spec <-y thr If yes, then execute operation S1410. If no, then execute operation S1411.

[0243] In operation S1408, the third gain value Ggain is decreased by 1.

[0244] In operation S1409, the first gain value Bgain is incremented by 1.

[0245] During operation S1410, the first gain value Bgain is decreased by 1.

[0246] In operation S1411, determine xx spec >x thr If yes, then execute operation S1412. If no, then execute operation S1413.

[0247] In operation S1412, determine if the second gain value Rgain = 255. If yes, execute operation S1414. If no, execute operation S1415.

[0248] In operation S1413, determine xx spec <-x thr If yes, then execute operation S1416. If no, then execute operation S1417.

[0249] In operation S1414, the first gain value Bgain is decreased by 1.

[0250] In operation S1415, the second gain value Rgain is incremented by 1.

[0251] In operation S1416, the second gain value Rgain is decreased by 1.

[0252] In operation S1417, the first test photosensitivity values ​​Rw, Gw, and Bw are converted into the brightness test value L based on the brightness excitation coefficient. R L G L B .

[0253] During operation S1418, based on the brightness test value L... R L G L B Determine the display brightness L.

[0254] In operation S1419, determine LL spec >L thr If yes, then execute operation S1421. If no, then execute operation S1420.

[0255] In operation S1420, determine LL spec <-L thr If yes, then execute operation S1422. If no, then execute operation S1423.

[0256] When operating S1421, the duty cycle of the PWM signal is increased by 1.

[0257] When operating S1422, the duty cycle of the PWM signal is reduced by 1.

[0258] In operation S1423, the control display panel displays the second test image at the target color temperature.

[0259] In operation S1424, the second test light sensitivity value is obtained.

[0260] In operation S1425, the color temperature deviation is determined based on multiple second test light sensitivity values, and the gamma curve is set based on the color temperature correction data and the color temperature deviation.

[0261] In operation S1426, the backlight brightness of the display panel is detected, and the backlight brightness value is obtained.

[0262] In operation S1427, the display brightness of the display panel is corrected based on the backlight brightness value.

[0263] In the embodiments of this disclosure, operations S1401 to S1427 can refer to the operations performed by the calibration devices 100, 200, 300, 400, 500, 600, 700 and 800 described above, and will not be repeated for the sake of brevity.

[0264] Figure 15 is a schematic flowchart of a correction method according to another embodiment of the present disclosure. Figure 15 illustrates a correction method for color temperature correction using chromaticity coordinates (v', u') as the first and second test values.

[0265] As shown in Figure 15, the correction method 1500 may include operations S1501 to S1527.

[0266] When operating S1501, the control display panel displays the first test image at the target color temperature.

[0267] During operation S1502, the first test light sensitivity values ​​Rw, Gw, and Bw are obtained.

[0268] In operation S1503, the first test photosensitivity values ​​Rw, Gw, and Bw are converted into color excitation values ​​XYZ according to the relative visibility coefficient.

[0269] In operation S1504, the color stimulus values ​​XYZ are converted into test chromaticity coordinates (u', v').

[0270] In operation S1505, determine v'-v' spec >v' thr If yes, then execute operation S1506. If no, then execute operation S1507.

[0271] In operation S1506, determine if the first gain value Bgain = 255. If yes, proceed to operation S1508. If no, proceed to operation S1509.

[0272] In operation S1507, determine v'-v' spec <-v' thr If yes, then execute operation S1510. If no, then execute operation S1511.

[0273] In operation S1508, the third gain value Ggain is decreased by 1.

[0274] In operation S1509, the first gain value Bgain is incremented by 1.

[0275] During operation S1510, the first gain value Bgain is decreased by 1.

[0276] In operation S1511, determine u'-u' spec >u' thr If yes, then execute operation S1512. If no, then execute operation S1513.

[0277] In operation S1512, determine if the second gain value Rgain = 255. If yes, proceed to operation S1514. If no, proceed to operation S1515.

[0278] In operation S1513, determine u'-u' spec -u' thr If yes, then execute operation S1516. If no, then execute operation S1517.

[0279] In operation S1514, the first gain value Bgain is decreased by 1.

[0280] In operation S1515, the second gain value Rgain is incremented by 1.

[0281] In operation S1516, the second gain value Rgain is decreased by 1.

[0282] In operation S1517, the first test photosensitivity values ​​Rw, Gw, and Bw are converted into the brightness test value L based on the brightness excitation coefficient. R L G L B .

[0283] During operation S1518, based on the brightness test value L... R L G L B Determine the display brightness L.

[0284] In operation S1519, determine LL spec >Lthr If yes, then execute operation S1521. If no, then execute operation S1520.

[0285] During operation S1520, determine LL. spec <-L thr If yes, then execute operation S1522. If no, then execute operation S1523.

[0286] When operating S1521, the duty cycle of the PWM signal is increased by 1.

[0287] When operating S1522, the duty cycle of the PWM signal is reduced by 1.

[0288] When operating S1523, the control display panel displays the second test image at the target color temperature.

[0289] In operation S1524, a second test light sensitivity value is obtained.

[0290] In operation of S1525, the color temperature deviation is determined based on multiple second test light sensitivity values, and the gamma curve is set based on the color temperature correction data and the color temperature deviation.

[0291] In operation S1526, the backlight brightness of the display panel is detected, and the backlight brightness value is obtained.

[0292] In operation S1527, the display brightness of the display panel is calibrated based on the backlight brightness value.

[0293] In the embodiments of this disclosure, operations S1501 to S1527 can refer to the operations performed by the calibration devices 100, 200, 300, 400, 500, 600, 700 and 800 described above, and will not be repeated for the sake of brevity.

[0294] Figure 16 is a schematic flowchart of a correction method according to another embodiment of the present disclosure. Figure 16 shows the process of using relative values ​​(K) B / G K R / G A correction method for color temperature correction using the first and second test values.

[0295] As shown in Figure 16, the correction method 1600 may include operations S1601 to S1626.

[0296] When operating S1601, the control display panel displays the first test image at the target color temperature.

[0297] In operation S1602, the first test photosensitivity values ​​Rw, Gw, and Bw are obtained.

[0298] In operation S1603, the relative value K is determined based on the first test photosensitivity values ​​Rw, Gw, and Bw. B / G K R / G .

[0299] In operation S1604, determine K. B / G -K specB / G >K thrB / G If yes, then execute operation S1605. If no, then execute operation S1606.

[0300] In operation S1605, determine if the first gain value Bgain = 255. If yes, proceed to operation S1607. If no, proceed to operation S1608.

[0301] In operation S1606, determine K. B / G -K specB / G <-K thrB / G If yes, then execute operation S1609. If no, then execute operation S1610.

[0302] In operation S1607, the third gain value Ggain is decreased by 1.

[0303] In operation S1608, the first gain value Bgain is incremented by 1.

[0304] In operation S1609, the first gain value Bgain is decreased by 1.

[0305] In operation S1610, determine K. R / G -K specR / G >K thrR / G If yes, then execute operation S1611. If no, then execute operation S1612.

[0306] In operation S1611, determine if the second gain value Rgain = 255. If yes, proceed to operation S1613. If no, proceed to operation S1614.

[0307] In operation S1612, determine K. R / G -K specR / G -K thrR / G If yes, then execute operation S1615. If no, then execute operation S1616.

[0308] In operation S1613, the first gain value Bgain is decreased by 1.

[0309] In operation S1614, the second gain value Rgain is incremented by 1.

[0310] In operation S1615, the second gain value Rgain is decreased by 1.

[0311] In operation S1616, the first test photosensitivity values ​​Rw, Gw, and Bw are converted into the brightness test value L based on the brightness excitation coefficient. R L G L B .

[0312] During operation S1617, based on the brightness test value L... R L G L B Determine the display brightness L.

[0313] During operation S1618, determine G. w -G wspec >G wthr If yes, then execute operation S1620. If no, then execute operation S1619.

[0314] In operation S1619, determine G. w -G wspec <-G wthr If yes, then execute operation S1621. If no, then execute operation S1622.

[0315] When operating S1620, the duty cycle of the PWM signal is increased by 1.

[0316] When operating S1621, the duty cycle of the PWM signal is reduced by 1.

[0317] In operation S1622, the control display panel displays the second test image at the target color temperature.

[0318] In operation S1623, a second test light sensitivity value is obtained.

[0319] In operation S1624, the color temperature deviation is determined based on multiple second test light sensitivity values, and the gamma curve is set based on the color temperature correction data and the color temperature deviation.

[0320] In operation S1625, the backlight brightness of the display panel is detected and the backlight brightness value is obtained.

[0321] In operation S1626, the display brightness of the display panel is corrected based on the backlight brightness value.

[0322] In the embodiments of this disclosure, operations S1601 to S1626 can refer to the operations performed by the calibration devices 100, 200, 300, 400, 500, 600, 700 and 800 described above, and will not be repeated for the sake of brevity. Figure 17 is a schematic flowchart of a display method according to an embodiment of this disclosure.

[0323] As shown in Figure 17, the display method 1700 may include operations S1710 to S1720.

[0324] In operation S1710, the display image is acquired.

[0325] In operation S1720, the image is displayed based on color temperature correction data.

[0326] In this embodiment of the disclosure, the color temperature correction data is obtained by correction method 1300.

[0327] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0328] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure can be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0329] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A calibration device, comprising: The first photosensitive sensor is configured to perform primary color light detection on the first display screen of the first test image at the target color temperature of the display panel to obtain multiple first test photosensitive values. as well as A first converter is configured to convert the plurality of first test photosensitivity values ​​into a first test value and a second test value, wherein the first test value is related to a first primary color in the display color temperature of the first display screen, and the second test value is related to a second primary color in the display color temperature; A first calibrator is configured to sequentially calibrate the first test value and the second test value to obtain color temperature calibration data. The color temperature calibration data is used to calibrate the display color temperature of the first display screen. The calibrated display color temperature of the first display screen is the calibrated display color temperature. The difference between the calibrated display color temperature and the target color temperature satisfies the color temperature display conditions.

2. The apparatus according to claim 1, wherein, The first converter includes: A primary color converter is configured to convert the plurality of first test photosensitivity values ​​into a plurality of color excitation values ​​according to the relative visibility coefficient of the target color temperature, wherein the relative visibility coefficient characterizes the relationship between the plurality of primary color lights and the display color temperature; and A first calculator is configured to calculate the first test value and the second test value based on the plurality of color stimulus values.

3. The apparatus according to claim 2, wherein, The first corrector includes: The second calculator is configured to calculate the relative visibility coefficient of each of the multiple primary color lights based on the initial photosensitivity value and the initial chromaticity values ​​of the multiple primary color lights. The initial chromaticity value and the initial photosensitivity value are obtained by the first photosensor detecting the display screen of the first test image in the initial state of the display panel at the target color temperature.

4. The apparatus according to claim 1, wherein, The first converter includes: A first generator is configured to generate the first test value based on the ratio of the test sensitivity value of the first primary color to the test sensitivity value of the third primary color among the plurality of test sensitivity values; and The second generator is configured to generate the second test value based on the ratio of the test sensitivity value of the second primary color to the test sensitivity value of the third primary color among the plurality of test sensitivity values.

5. The apparatus according to claim 1, wherein, The first corrector includes: A first adjuster is configured to adjust a first gain value based on the difference between a first standard value and a first test value, such that the difference between the first standard value and the first test value is less than or equal to a first threshold, wherein the first gain value is used to correct the first primary color in the display color temperature; and A second adjuster is configured to adjust a second gain value based on the difference between a second standard value and a second test value such that the difference between the second standard value and the second test value is less than or equal to a second threshold in response to the difference between the first standard value and the first test value being less than or equal to a second threshold, wherein the second gain value is used to correct the second primary color in the display color temperature; The color temperature correction data includes an adjusted first gain value and an adjusted second gain value.

6. The apparatus according to claim 5, wherein, The first corrector further includes: A third adjuster is configured to adjust a third gain value when it is determined that the adjusted first gain value is equal to a correction threshold and the difference between the first standard value and the first test value is greater than the first threshold, wherein the third gain value is used to correct the third primary color in the display color temperature.

7. The apparatus according to claim 5, wherein, The first adjuster is also configured to: If the adjusted second gain value is equal to the correction threshold and the difference between the second standard value and the second test value is greater than the second threshold, the first gain value is adjusted.

8. The apparatus according to claim 1, further comprising: The second converter is configured to convert the plurality of test photosensitivity values ​​into a third test value in response to the difference between the corrected display color temperature and the target color temperature satisfying the color temperature display conditions. The third test value characterizes the display brightness of the first display screen. as well as The second calibrator is configured to calibrate the third test value to obtain brightness correction data, wherein the brightness correction data is used to correct the display brightness of the first display screen, and the display brightness of the first display screen after correction based on the brightness correction data is the corrected display brightness, and the difference between the corrected display brightness and the target brightness satisfies the brightness display condition.

9. The apparatus according to claim 8, wherein, The second converter is configured as follows: Based on the luminance excitation coefficient of the target color temperature, the plurality of test photosensitivity values ​​are converted into a third test value; the luminance excitation coefficient characterizes the relationship between the plurality of primary color lights and the display brightness.

10. The apparatus according to claim 8, wherein, The second corrector includes: The third calculator is configured to calculate the brightness excitation coefficient of each of the multiple primary color lights based on the initial photosensitivity value and the initial brightness values ​​of the multiple primary color lights; The initial photosensitivity value and the initial brightness value are obtained by the first photosensor detecting the display screen of the first test image at the target color temperature on the display panel in the initial state.

11. The apparatus according to any one of claims 1-10, wherein, The first photosensor is further configured to, in response to a difference between the corrected display color temperature and the target color temperature satisfying a color temperature display condition, perform primary color light detection on the second display screen of the display panel for the second test image, and obtain a plurality of second test photosensitivity values; and The first converter is also configured to convert the plurality of second test photosensitivity values ​​into color temperature deviations; and The first corrector is also configured to set a gamma curve based on color temperature correction data and the color temperature deviation, the gamma curve indicating the relationship between the display brightness of the display screen and the grayscale image display effect.

12. The apparatus according to any one of claims 1-10, further comprising a second photosensor configured as follows: The backlight brightness of the display panel is detected to obtain the backlight brightness value; in, The first calibrator is also configured to calibrate the display brightness of the display panel based on the backlight brightness value.

13. A display device, comprising: The correction device according to any one of claims 1-12 is configured to set the color temperature correction data; as well as The display panel is configured to display an image based on the color temperature correction data.

14. The apparatus of claim 13, further comprising: A frame, which covers the edge of the display panel, has a cavity inside the frame and an opening on the frame; as well as A motor assembly is fixedly disposed within the cavity, and the motor assembly includes a sliding component; The first photosensitive element of the correction device is fixedly connected to the sliding assembly, and the sliding assembly drives the first photosensitive element to pop out of the cavity from the opening or retract into the cavity.

15. The device according to claim 14, wherein, The motor assembly also includes: A conductive carrier is fixedly disposed at one end of the sliding assembly, and the first photosensitive sensor is fixedly disposed on the conductive carrier. The conductive carrier is electrically connected to the first photosensitive sensor, the first converter, and the first corrector.

16. The device according to claim 15, wherein, The motor assembly also includes: A blocking component is fixedly disposed on the conductive carrier and surrounds the first photosensitive sensor, wherein when the sliding component causes the first photosensitive sensor to retract from the opening into the cavity, the blocking component fills the opening.

17. A calibration method, comprising: Acquire multiple first test photosensitivity values ​​of the display screen of the display panel, wherein the multiple first test photosensitivity values ​​are obtained by detecting the primary color light of the display screen of the test image at the target color temperature; The plurality of first test photosensitivity values ​​are converted into first test values ​​and second test values, wherein the first test value is related to the first primary color in the display color temperature of the display screen, and the second test value is related to the second primary color in the display color temperature; The first test value and the second test value are corrected sequentially to obtain color temperature correction data. The color temperature correction data is used to correct the display color temperature of the first display screen. The corrected display color temperature of the first display screen is the corrected display color temperature. The difference between the corrected display color temperature and the target color temperature satisfies the color temperature display conditions.

18. A display method, comprising: Get the displayed image; as well as The display image is displayed based on the color temperature correction data, which is obtained based on the correction method described in claim 17.

Images