Color calibration processing method and electronic equipment

Abstract

The invention provides a color calibration processing method and electronic equipment. The method comprises the following steps: acquiring primary color information of light-emitting equipment; determining the theoretical brightness of each channel corresponding to the target color; determining the current duty ratio of each channel under the current junction temperature according to the current junction temperature, the reference junction temperature brightness of each channel and the theoretical brightness of each channel corresponding to the target color, and obtaining a color mixing output result; determining new reference junction temperature brightness of each channel and junction temperature offset of each channel; obtaining a new maximum brightness and a new current duty ratio of each channel under the current junction temperature, and lightening the light-emitting device again based on each new current duty ratio to obtain a new color mixing output result; and if the new color mixing output result meets the preset error range, taking the junction temperature offset of each channel as the calibration junction temperature offset of each channel of the light-emitting equipment, and taking the new reference junction temperature brightness of each channel as the calibration reference junction temperature brightness of each channel. And the color mixing precision of the light-emitting equipment in the whole working temperature range is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile lamps, and in particular to a color calibration processing method and electronic equipment. Background Art

[0002] Ambient lighting is a decorative lighting device used in vehicle interiors. It creates a unique atmosphere and mood by emitting light of varying colors, brightness, and effects, enhancing driving comfort. Due to manufacturing variations, the luminous power of each light-emitting diode (LED) varies, affecting the resulting color mixing. Furthermore, since the luminous power of LEDs is affected by operating temperature, variations in luminous power at different junction temperatures can lead to deviations in the final color mixing. Therefore, ambient light calibration is necessary to ensure consistent color output from each LED and maintain consistent ambient light colors. Key factors in ambient light calibration methods include color mixing accuracy and calibration speed. Junction temperature compensation is a key method for improving color mixing accuracy.

[0003] In the existing technology, the limited accuracy of color mixing is specifically reflected in the entire operating temperature range of LED color mixing. Generally speaking, the accuracy of color mixing results at room temperature is relatively ideal. However, as the junction temperature rises, the junction temperature compensation will gradually show some inadequate compensation. The reasons for this are: junction temperature compensation can only compensate for the light decay caused by the junction temperature, but cannot control the influence of color drift. In addition, there may be some differences in the junction temperature-relative luminous flux between different LEDs. In addition, there will be certain differences in the detection of junction temperature between LEDs. For example, when detecting junction temperature with voltage, the reference voltage value will be different, and the junction temperature-voltage change curve will also have certain differences. Therefore, the color mixing accuracy of LEDs is limited throughout the entire operating temperature range.

[0004] In addition, junction temperature detection itself is difficult and the accuracy is difficult to improve. Compensation for LED light decay cannot be very effective. At different operating temperatures, the luminous ability of the LED will change. Therefore, after the temperature rises or falls (high temperature 120, low temperature -40), the color mixing accuracy error will increase, making it difficult to effectively improve and control the accuracy of the light-emitting device within the entire operating temperature range. Therefore, it is difficult to effectively improve the calibrated color mixing accuracy.

[0005] Furthermore, the RGB color gradation of the ambient light does not conform to the standard RGB color space, and the color variation does not strictly follow the linear RGB color space variation or the RGB color space variation through compression processing based on human eye perception. This results in insufficient RGB color performance of the vehicle ambient light, poor visual effects in screen display or color setting, and when customers customize the ambient light color, the actual output color is inconsistent with the visual effect on the screen. The existing technology can be used to calibrate the target color to meet the color requirements, but this method causes the color variation and selected space to be affected by the size of the target color data set. Increasing the size of the target color data set consumes a large amount of storage resources. Summary of the Invention

[0006] The purpose of this application is to provide a color calibration processing method and electronic device to improve the color mixing accuracy of light-emitting devices in response to the above-mentioned deficiencies in the prior art.

[0007] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0008] In a first aspect, an embodiment of the present application provides a color calibration processing method, the method comprising:

[0009] Acquire primary color information of each primary color when the light emitting device lights up the primary color, the primary color information including: primary color brightness, primary color junction temperature, and primary color color coordinates;

[0010] Determine the theoretical brightness of each channel corresponding to the target color;

[0011] Obtaining a current junction temperature of the light-emitting device at the target color, and determining a current duty cycle of each channel at the current junction temperature based on the current junction temperature, a reference junction temperature brightness of each channel, and a theoretical brightness of each channel corresponding to the target color, and obtaining a color mixing output result of the light-emitting device after lighting the light-emitting device based on the current duty cycle, the color mixing output result including the color mixing output color coordinates, the color mixing output brightness, and the junction temperature during the color mixing output;

[0012] Determining a new reference junction temperature brightness of each channel and a junction temperature offset of each channel based on the color mixing output result, the primary color information of each primary color, and the current duty cycle of each channel; obtaining a new maximum brightness and a new current duty cycle of each channel at the current junction temperature based on the new reference junction temperature brightness of each channel, the junction temperature offset of each channel, and the current junction temperature; and re-lighting the light-emitting device based on each new current duty cycle to obtain a new color mixing output result;

[0013] If the new color mixing output result meets the preset error range, the junction temperature offset of each channel is used as the calibrated junction temperature offset of each channel of the light-emitting device, and the new reference junction temperature brightness of each channel is used as the calibrated reference junction temperature brightness of each channel.

[0014] Optionally, obtaining the current junction temperature of the light-emitting device at the target color includes:

[0015] Determining the duty cycle of each channel at the preset junction temperature according to the preset junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color;

[0016] After the light-emitting device is lit based on the duty cycle of each channel at the preset junction temperature, the current junction temperature of the light-emitting device at the target color is obtained.

[0017] Optionally, determining a current duty cycle of each channel at the current junction temperature according to the current junction temperature, a reference junction temperature brightness of each channel, and a theoretical brightness of each channel corresponding to the target color includes:

[0018] Determining, according to the current junction temperature, a relative luminous intensity corresponding to each primary color at the current junction temperature, wherein the relative luminous intensity is used to indicate a ratio of a maximum brightness at the junction temperature to a brightness at a reference junction temperature;

[0019] The product of the relative luminous intensity corresponding to each primary color and the reference junction temperature brightness of each channel is taken as the maximum brightness of each channel at the current junction temperature;

[0020] Divide the theoretical brightness of each channel by the maximum brightness of each channel at the current junction temperature to obtain the current duty cycle of each channel.

[0021] Optionally, determining a new reference junction temperature brightness of each channel and a junction temperature offset of each channel according to the color mixing output result, primary color information of each primary color, and a current duty cycle of each channel includes:

[0022] Determining CIE-XYZ coordinates of the mixed color output according to the mixed color output color coordinates and the mixed color output brightness in the mixed color output result;

[0023] Determine the actual maximum brightness of each channel of the mixed color output according to the CIE-XYZ coordinates of the mixed color output, the primary color coordinates in the primary color information of each primary color, and the current duty cycle of each channel;

[0024] According to the actual maximum brightness of each channel, the primary color brightness of each primary color, the primary color junction temperature of each primary color and the junction temperature during color mixing output, a new reference junction temperature brightness of each channel and a junction temperature offset of each channel are obtained.

[0025] Optionally, determining the actual maximum brightness of each channel of the mixed color output according to the CIE-XYZ coordinates of the mixed color output, the primary color coordinates in the primary color information of each primary color, and the current duty cycle of each channel includes:

[0026] Determine the actual brightness of each channel according to the CIE-XYZ coordinates of the color mixing output and the primary color coordinates in the primary color information of each primary color;

[0027] The actual maximum brightness of each channel is determined according to the actual brightness of each channel and the current duty cycle of each channel.

[0028] Optionally, obtaining a new maximum brightness and a new current duty cycle of each channel at the current junction temperature based on the new reference junction temperature brightness of each primary color, the junction temperature offset of each channel, and the current junction temperature includes:

[0029] Taking the sum of the current junction temperature and the junction temperature offset of each channel as the new current junction temperature of each channel, and determining a new relative luminous intensity corresponding to each new current junction temperature;

[0030] The product of each of the new relative luminous intensity and the new reference junction temperature brightness of each primary color is used as the new maximum brightness of each channel;

[0031] Divide the theoretical brightness of each channel by the new maximum brightness of each channel to obtain the new current duty cycle of each channel.

[0032] Optionally, determining the theoretical brightness of each channel corresponding to the target color includes:

[0033] Determine the RGB coordinates of a target color of a light-emitting device, and convert the RGB coordinates of the target color into device coordinates in a device color space;

[0034] The theoretical brightness of each channel corresponding to the target color is determined according to the reference brightness of each channel of the synthesized reference white point in the standard RGB color space and the device coordinates.

[0035] Optionally, converting the RGB coordinates of the target color into device coordinates in a device color space includes:

[0036] Determine the reference brightness of each channel corresponding to the reference white point according to the CIE-XYZ coordinates of the reference white point in the standard RGB color space and the primary color coordinates of each primary color;

[0037] Determine a first conversion matrix based on the primary color information in the standard RGB color space, where the first conversion matrix is ​​a conversion matrix between coordinates in the linear RGB space corresponding to the standard RGB and CIE-XYZ coordinates;

[0038] Determine a second conversion matrix based on primary color information of each primary color when the light-emitting device lights up the primary color and the reference brightness of each channel corresponding to the reference white point, where the second conversion matrix is ​​a conversion matrix between coordinates in the color space of the light-emitting device and CIE-XYZ coordinates;

[0039] The RGB coordinates are converted into the device coordinates according to the first conversion matrix and the second conversion matrix.

[0040] Optionally, it also includes:

[0041] Obtaining the RGB coordinates of the target color of the light-emitting device selected by the user, and converting the RGB coordinates of the target color into device coordinates in the color space of the light-emitting device according to the first conversion matrix and the second conversion matrix;

[0042] Determining a target theoretical brightness of each channel corresponding to the target color based on the device coordinates and the reference brightness of each channel of a reference white point in a synthetic standard RGB color space;

[0043] The target duty cycle of each channel is determined based on the calibrated junction temperature offset of each channel, the calibrated reference junction temperature brightness of each channel, the junction temperature to be illuminated, and the target theoretical brightness of each channel.

[0044] In a second aspect, an embodiment of the present application further provides a color calibration processing device, the device comprising:

[0045] An acquisition module is used to acquire primary color information of each primary color when the light-emitting device lights up the primary color, wherein the primary color information includes: primary color brightness, primary color junction temperature, and primary color coordinates;

[0046] A first determination module is used to determine the theoretical brightness of each channel corresponding to the target color of the light-emitting device;

[0047] a second determination module, configured to obtain a current junction temperature of the light-emitting device at the target color, and determine a current duty cycle of each channel at the current junction temperature based on the current junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color, and obtain a color mixing output result of the light-emitting device after lighting the light-emitting device based on the current duty cycle, wherein the color mixing output result includes the color mixing output color coordinates, the color mixing output brightness, and the junction temperature during the color mixing output;

[0048] a third determination module, configured to determine, based on the color mixing output result, the primary color information of each primary color, and the current duty cycle of each channel, a new reference junction temperature brightness of each channel and a junction temperature offset of each channel; and obtain, based on the new reference junction temperature brightness of each channel, the junction temperature offset of each channel, and the current junction temperature, a new maximum brightness and a new current duty cycle of each channel at the current junction temperature; and re-light the light-emitting device based on each new current duty cycle to obtain a new color mixing output result;

[0049] If the new color mixing output result meets the preset error range, the junction temperature offset of each channel is used as the calibrated junction temperature offset of each channel of the light-emitting device, and the new reference junction temperature brightness of each channel is used as the calibrated reference junction temperature brightness of each channel.

[0050] Optionally, the second determining module is specifically configured to:

[0051] Determining the duty cycle of each channel at the preset junction temperature according to the preset junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color;

[0052] After the light-emitting device is lit based on the duty cycle of each channel at the preset junction temperature, the current junction temperature of the light-emitting device at the target color is obtained.

[0053] Optionally, the second determining module is specifically configured to:

[0054] Determining, according to the current junction temperature, a relative luminous intensity corresponding to each primary color at the current junction temperature, wherein the relative luminous intensity is used to indicate a ratio of a maximum brightness at the junction temperature to a brightness at a reference junction temperature;

[0055] The product of the relative luminous intensity corresponding to each primary color and the reference junction temperature brightness of each channel is taken as the maximum brightness of each channel at the current junction temperature;

[0056] Divide the theoretical brightness of each channel by the maximum brightness of each channel at the current junction temperature to obtain the current duty cycle of each channel.

[0057] Optionally, the third determining module is specifically configured to:

[0058] Determining CIE-XYZ coordinates of the mixed color output according to the mixed color output color coordinates and the mixed color output brightness in the mixed color output result;

[0059] Determine the actual maximum brightness of each channel of the mixed color output according to the CIE-XYZ coordinates of the mixed color output, the primary color coordinates in the primary color information of each primary color, and the current duty cycle of each channel;

[0060] According to the actual maximum brightness of each channel, the primary color brightness of each primary color, the primary color junction temperature of each primary color and the junction temperature during color mixing output, a new reference junction temperature brightness of each channel and a junction temperature offset of each channel are obtained.

[0061] Optionally, the third determining module is specifically configured to:

[0062] Determine the actual brightness of each channel according to the CIE-XYZ coordinates of the color mixing output and the primary color coordinates in the primary color information of each primary color;

[0063] The actual maximum brightness of each channel is determined according to the actual brightness of each channel and the current duty cycle of each channel.

[0064] Optionally, the third determining module is specifically configured to:

[0065] Taking the sum of the current junction temperature and the junction temperature offset of each channel as the new current junction temperature of each channel, and determining a new relative luminous intensity corresponding to each new current junction temperature;

[0066] The product of each of the new relative luminous intensity and the new reference junction temperature brightness of each primary color is used as the new maximum brightness of each channel;

[0067] Divide the theoretical brightness of each channel by the new maximum brightness of each channel to obtain the new current duty cycle of each channel.

[0068] Optionally, the first determining module is specifically configured to:

[0069] Determine the RGB coordinates of a target color of a light-emitting device, and convert the RGB coordinates of the target color into device coordinates in a device color space;

[0070] The theoretical brightness of each channel corresponding to the target color is determined according to the reference brightness of each channel of the synthesized reference white point in the standard RGB color space and the device coordinates.

[0071] Optionally, the first determining module is specifically configured to:

[0072] Determine the reference brightness of each channel corresponding to the reference white point according to the CIE-XYZ coordinates of the reference white point in the standard RGB color space and the primary color coordinates of each primary color;

[0073] Determine a first conversion matrix based on the primary color information in the standard RGB color space, where the first conversion matrix is ​​a conversion matrix between coordinates in the linear RGB space corresponding to the standard RGB and CIE-XYZ coordinates;

[0074] Determine a second conversion matrix based on primary color information of each primary color when the light-emitting device lights up the primary color and the reference brightness of each channel corresponding to the reference white point, where the second conversion matrix is ​​a conversion matrix between coordinates in the color space of the light-emitting device and CIE-XYZ coordinates;

[0075] The RGB coordinates are converted into the device coordinates according to the first conversion matrix and the second conversion matrix.

[0076] Optionally, the method further includes a fourth determining module, configured to:

[0077] Obtaining the RGB coordinates of the target color of the light-emitting device selected by the user, and converting the RGB coordinates of the target color into device coordinates in the color space of the light-emitting device according to the first conversion matrix and the second conversion matrix;

[0078] Determining a target theoretical brightness of each channel corresponding to the target color based on the device coordinates and the reference brightness of each channel of a reference white point in a synthetic standard RGB color space;

[0079] The target duty cycle of each channel is determined based on the calibrated junction temperature offset of each channel, the calibrated reference junction temperature brightness of each channel, the junction temperature to be illuminated, and the target theoretical brightness of each channel.

[0080] In a third aspect, an embodiment of the present application further provides an electronic device comprising: a processor, a storage medium, and a bus, wherein the storage medium stores program instructions executable by the processor. When an application is running, the processor communicates with the storage medium via the bus, and the processor executes the program instructions to perform the steps of the color calibration processing method described in the first aspect above.

[0081] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. The computer program is read and executes the steps of the color calibration processing method described in the first aspect above.

[0082] The beneficial effects of this application are:

[0083] The present application provides a color calibration processing method and electronic device, which obtains the primary color information of each primary color when the light-emitting device lights up the primary color; and determines the theoretical brightness of each channel corresponding to the target color. Obtain the current junction temperature of the light-emitting device at the target color, and determine the current duty cycle of each channel at the current junction temperature based on the current junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color, and obtain the color mixing output result of the light-emitting device after the light-emitting device is illuminated based on the current duty cycle; determine the new reference junction temperature brightness of each channel and the junction temperature offset of each channel based on the color mixing output result, the primary color information of each primary color, and the current duty cycle of each channel, and obtain the new maximum brightness and new current duty cycle of each channel at the current junction temperature based on the new reference junction temperature brightness of each channel, the junction temperature offset of each channel, and the current junction temperature, and re-light the light-emitting device based on each new current duty cycle to obtain a new color mixing output result; if the new color mixing output result meets the preset error range, the junction temperature offset of each channel is used as the calibrated junction temperature offset of each channel of the light-emitting device, and the new reference junction temperature brightness of each channel is used as the calibrated reference junction temperature brightness of each channel. Since the new maximum brightness of each channel is the actual maximum brightness of each channel after correction, the color mixing output result is used to infer the actual luminous capacity of each channel after correction at the current junction temperature. This can detect various color mixing inaccuracies caused by junction temperature detection errors, color drift, and differences in junction temperature-relative luminous intensity characteristics between LEDs. The junction temperature offset of each channel obtained based on the color mixing output result is also more accurate. The junction temperature offset method corrects errors caused by color drift and inadequate junction temperature compensation, balancing the color mixing errors of the light-emitting device across the entire operating temperature range, thereby improving the color mixing accuracy of the light-emitting device across the entire operating temperature range and, to a certain extent, compensating for errors caused by color drift and other factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0085] Figure 1 Schematic diagram of the CIE-XYZ coordinate system;

[0086] Figure 2 Schematic diagram of CIE-xyY color space;

[0087] Figure 3 is an xy chromaticity diagram;

[0088] Figure 4 is another xy chromaticity diagram;

[0089] Figure 5 A schematic diagram of a color calibration process provided in an embodiment of the present application;

[0090] Figure 6 A schematic diagram of a second color calibration process provided in an embodiment of the present application;

[0091] Figure 7 A schematic diagram of a junction temperature-relative luminous intensity variation curve provided in an embodiment of the present application;

[0092] Figure 8 A schematic diagram of a flow chart of a third color calibration processing method provided in an embodiment of the present application;

[0093] Figure 9 A schematic diagram of a fourth color calibration process provided in an embodiment of the present application;

[0094] Figure 10 A schematic diagram of a fifth color calibration method provided in an embodiment of the present application;

[0095] Figure 11 A schematic diagram of a sixth color calibration method provided in an embodiment of the present application;

[0096] Figure 12 A flowchart of a seventh color calibration method provided in an embodiment of the present application;

[0097] Figure 13 A complete flowchart of a color calibration method provided in an embodiment of the present application;

[0098] Figure 14 A schematic diagram of a device for a color calibration processing method provided in an embodiment of the present application;

[0099] Figure 15 This is a structural block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0100] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of illustration and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps without logical context can be reversed or implemented simultaneously. In addition, those skilled in the art, under the guidance of the contents of this application, can add one or more other operations to the flowchart, or remove one or more operations from the flowchart.

[0101] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0102] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0103] First, combine Figure 1-Figure 4 Examples are provided to explain the terminology and concepts involved in this application.

[0104] The color mixing of ambient lights requires the CIE-XYZ and CIE-xyY coordinate systems. The CIE-XYZ coordinate system is a coordinate system set up to match all visible light. The XYZ three coordinate axes represent the three primary colors or tristimulus values.

[0105] The standard RGB color space is used in the display field. The color space is fixed, and linear RGB correction will be performed to make it more consistent with the color perception of the visual system. However, the RGB space established by the primary colors belongs to the linear RGB space, and the standard RGB space needs to be decompressed for color space conversion.

[0106] A linear RGB color space can be constructed using RGB colors of any wavelength as primary colors. However, the size of the color space is affected by the wavelength of the primary colors, and when RGB matches all visible light, some light will fall in the negative range and cannot be expressed. Therefore, CIE imagined three non-existent primary colors to establish an XYZ coordinate system, so that when the coordinate system matches visible light, all visible light is distributed in the positive range of the coordinate axis. The CIE-XYZ coordinate system is as follows: Figure 1 shown.

[0107] Since x+y+z=1, knowing two of the values ​​can get the third value, so in the CIE-xyY coordinate system, only xy is needed to describe the color information, and Y represents the brightness information. The CIE-xyY color space diagram is as follows Figure 2 shown.

[0108] The projection of CIE-xyY on the xy plane is the result of CIE-XYZ normalization. Since it only contains two unknowns, the color information can be expressed using a plane, and the xy chromaticity diagram is obtained as follows Figure 3 The coordinates on the xy chromaticity diagram are the color coordinates of visible light colors. The color space established with any three primary colors can form a triangle on the xy chromaticity diagram, such as Figure 4 As shown in the figure, the triangle vertex positions are the primary color coordinates, and the triangle area contains all the colors that can be obtained by mixing the three primary colors. LED lights use RGB as the tristimulus values ​​to participate in color mixing.

[0109] Optionally, the color calibration processing method provided in the embodiments of the present application is applied to an electronic device, such as a mobile phone, tablet computer, laptop computer, PDA, desktop computer, or other terminal device with computing and display capabilities, or a server. Specifically, the method can be applied to an application in the terminal device, such as a mobile phone application (APP) or a computer application system.

[0110] The specific implementation process of the color calibration processing provided in the embodiment of the present application is explained in detail below.

[0111] Figure 5 This is a flow chart of a color calibration processing method provided in an embodiment of the present application, and the execution subject of the method is the aforementioned electronic device. Figure 5 As shown, the method includes:

[0112] S101 , obtaining primary color information of each primary color when a light-emitting device lights up a primary color.

[0113] The primary color information may include: primary color brightness, primary color junction temperature, and primary color coordinates.

[0114] Specifically, when measuring the primary colors, the electronic device can sequentially light up the R lamp, G lamp, and B lamp with full duty cycle as the mixed color primary colors. When a single color is lit, the color coordinates and brightness of the primary color can be measured using a measuring instrument such as an integrating sphere or a spectrometer. For example, the primary color coordinates of the R lamp, G lamp, and B lamp are (x1, y1), (x2, y2), (x3, y3), and the primary color brightness is Y primaryR 、Y primaryG 、Y primaryB At the same time, the junction temperature when the primary color is lit can also be read. The primary color junction temperature is: T j,primatyR 、T j,primaryG 、T j,primaryB Since the color coordinates have the relationship x+y+z=1, the primary color coordinates of the R lamp, G lamp, and B lamp are (x1, y1, z1), (x2, y2, z2), and (x3, y3, z3), respectively. The primary color coordinates of each primary color are the coordinates in the CIE-XYZ coordinate system.

[0115] S102: Determine the theoretical brightness of each channel corresponding to the target color of the light-emitting device.

[0116] Among them, the target color refers to the color obtained by the light-emitting device after color mixing, and one or more target colors can be pre-set. For each target color, the theoretical brightness of each channel corresponding to the target color can be calculated using a preset method. The theoretical brightness of each channel may include: R channel theoretical brightness, G channel theoretical brightness, and B channel theoretical brightness. Based on the theoretical brightness of each channel, the brightness of the target color can be theoretically obtained. Among them, the theoretical brightness of the R channel can be represented by Y1, for example, the theoretical brightness of the G channel can be represented by Y2, for example, and the theoretical brightness of the B channel can be represented by Y3.

[0117] Optionally, the target color can be selected as reddish, bluish, or greenish to respectively calculate the junction temperature offset of the R channel, the junction temperature offset of the G channel, and the junction temperature offset of the B channel. Among them, the reddish target color can be (128, 5, 5), the bluish target color can be (5, 5, 128), and the greenish target color can be (5, 128, 5). The target color can also be selected as a single target color, and the junction temperature offset of the R channel, the junction temperature offset of the G channel, and the junction temperature offset of the B channel can be calculated at the same time.

[0118] S103. Obtain the current junction temperature of the light-emitting device at the target color, and determine the current duty cycle of each channel at the current junction temperature based on the current junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color, and obtain the mixed color output result of the light-emitting device after the light-emitting device is lit based on the current duty cycle.

[0119] The mixed color output result may include: mixed color output color coordinates, mixed color output brightness and junction temperature during mixed color output. MixingOutput ,y MixingOutput ,z MixingOutput ) to represent the mixed color output brightness, for example, Y MixtingOutput To express the junction temperature during mixed color output, for example, T j,MixingOutput To express.

[0120] Specifically, the junction temperature is the actual operating temperature of the semiconductor in the light-emitting device, and the current junction temperature refers to the junction temperature of the light-emitting device at the target color after the light-emitting device is lit with the target color as the target, that is, the current junction temperature T is obtained. j1 The reference junction temperature brightness of each channel refers to the reference junction temperature brightness Y of the R channel. refR , G channel reference junction temperature brightness Y refG And the reference junction temperature brightness Y of channel B refB . Then according to the current junction temperature T j1 , R channel reference junction temperature brightness Y refR , G channel reference junction temperature brightness Y refG , Reference junction temperature brightness Y of channel B refB The R channel theoretical brightness Y1, the G channel theoretical brightness Y2, and the B channel theoretical brightness Y3 use a preset method to obtain the current duty cycle D1 of the R channel, the current duty cycle D2 of the G channel, and the current duty cycle D3 of the B channel.

[0121] Optionally, after determining the current duty cycle D1 of the R channel, the current duty cycle D2 of the G channel, and the current duty cycle D3 of the B channel, the R channel of the light-emitting device can be lit based on the current duty cycle D1 of the R channel, the G channel of the light-emitting device can be lit based on the current duty cycle D2 of the G channel, and the B channel of the light-emitting device can be lit based on the current duty cycle D3 of the B channel, and the mixed color output result of the light-emitting device can be obtained after lighting.

[0122] S104. Determine the new reference junction temperature brightness of each channel and the junction temperature offset of each channel based on the color mixing output result, the primary color information of each primary color, and the current duty cycle of each channel, and obtain the new maximum brightness and new current duty cycle of each channel at the current junction temperature based on the new reference junction temperature brightness of each channel, the junction temperature offset of each channel, and the current junction temperature, and re-light the light-emitting device based on each new current duty cycle to obtain a new color mixing output result.

[0123] The new maximum brightness of each channel is the maximum brightness of each channel after performing junction temperature compensation based on the junction temperature offset of each channel, that is, the actual maximum brightness of each channel after correction. The new reference junction temperature brightness of each channel is the reference junction temperature brightness obtained by applying junction temperature compensation to the current junction temperature.

[0124] Specifically, the color coordinates (x MixingOutput ,y MixingOutput ,z MixingOutput ), color mixing output brightness Y MixtingOutput , junction temperature T when mixed color output j,Mixingoutput , the primary color information when each primary color is lit, the current duty cycle D1 of the R channel, the current duty cycle D2 of the G channel, and the current duty cycle D3 of the B channel use a preset method to determine the new reference junction temperature brightness of each channel and the junction temperature offset of each channel, that is, determine the new current duty cycle D′1 of the R channel, the new current duty cycle D′x of the G channel, and the new current duty cycle D′3 of the B channel, and the junction temperature offset ΔT of the R channel jR , G channel junction temperature offset ΔT jG , R channel junction temperature offset ΔT jB The new reference junction temperature brightness Y′ of the R channel refR , the new reference junction temperature brightness Y′ of the G channel refG And the new reference junction temperature brightness Y′ of channel B refB .

[0125] The output result of the junction temperature compensation is applied in the process of obtaining the new current occupancy ratio and the new maximum brightness of each channel, so that the error between the obtained new color mixing output result and the target color is smaller.

[0126] Optionally, after obtaining the new current duty cycle of each channel, the R channel of the light-emitting device can be re-lit based on the new current duty cycle D′1 of the R channel, the G channel of the light-emitting device can be re-lit based on the new current duty cycle D′2 of the G channel, and the B channel of the light-emitting device can be re-lit based on the new current duty cycle D′3 of the B channel. After relighting, the new color mixing output result of the light-emitting device is obtained.

[0127] S105: Determine whether the new color mixing output result meets a preset error range.

[0128] Optionally, it is possible to determine whether the difference between the new color mixing output result and the target color satisfies a preset error range. Specifically, it is possible to calculate whether the difference between the color and brightness of the new color mixing output result and the color and brightness of the target color satisfies a preset error range.

[0129] If the new color mixing output result meets the preset error range, the following step S106 is executed; otherwise, the process returns to the above-mentioned step S103 or step S101. Specifically, if the primary color measurement is incorrect, the primary colors of the light-emitting device are remeasured, that is, the process returns to step S101 to re-acquire the primary color information of each primary color when the light-emitting device lights up the primary color; if the current junction temperature measurement of the light-emitting device at the target color is incorrect, the process returns to step S103 and lights up the light-emitting device again.

[0130] S106 , using the junction temperature offset of each channel as the calibrated junction temperature offset of each channel of the light-emitting device, and using the new reference junction temperature brightness of each channel as the calibrated reference junction temperature brightness of each channel.

[0131] Optionally, the junction temperature offset of each channel can be used as the calibrated junction temperature offset of each channel of the light-emitting device, and the new reference junction temperature brightness of each channel can be used as the calibrated reference junction temperature brightness of each channel. That is, the calibrated junction temperature offset of each channel and the calibrated reference junction temperature brightness of each channel can be written into the chip of the light-emitting device as the calibration information of the target color, and the primary color information of each primary color obtained when the primary color of the light-emitting device is measured can also be written into the chip of the light-emitting device.

[0132] In this embodiment, the primary color information of each primary color when the light-emitting device lights up the primary color is obtained; and the theoretical brightness of each channel corresponding to the target color is determined. Obtain the current junction temperature of the light-emitting device at the target color, and determine the current duty cycle of each channel at the current junction temperature based on the current junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color, and obtain the color mixing output result of the light-emitting device after the light-emitting device is illuminated based on the current duty cycle; determine the new reference junction temperature brightness of each channel and the junction temperature offset of each channel based on the color mixing output result, the primary color information of each primary color, and the current duty cycle of each channel, and obtain the new maximum brightness and new current duty cycle of each channel at the current junction temperature based on the new reference junction temperature brightness of each channel, the junction temperature offset of each channel, and the current junction temperature, and re-light the light-emitting device based on each new current duty cycle to obtain a new color mixing output result; if the new color mixing output result meets the preset error range, the junction temperature offset of each channel is used as the calibrated junction temperature offset of each channel of the light-emitting device, and the new reference junction temperature brightness of each channel is used as the calibrated reference junction temperature brightness of each channel. Since the new maximum brightness of each channel is the actual maximum brightness of each channel after correction, the color mixing output result is used to infer the actual luminous capacity of each channel after correction at the current junction temperature. This can detect various color mixing inaccuracies caused by junction temperature detection errors, color drift, and differences in junction temperature-relative luminous intensity characteristics between LEDs. The junction temperature offset of each channel obtained based on the color mixing output result is also more accurate. The junction temperature offset method corrects errors caused by color drift and inadequate junction temperature compensation, balancing the color mixing errors of the light-emitting device across the entire operating temperature range, thereby improving the color mixing accuracy of the light-emitting device across the entire operating temperature range and, to a certain extent, compensating for errors caused by color drift and other factors.

[0133] Figure 6 A flow chart of the second color calibration processing method provided in the embodiment of the present application is shown as follows: Figure 6 As shown, the above S103, obtaining the current junction temperature of the light-emitting device at the target color, may include:

[0134] S201 : Determine a duty cycle of each channel at a preset junction temperature according to a preset junction temperature, a reference junction temperature brightness of each channel, and a theoretical brightness of each channel corresponding to a target color.

[0135] Specifically, it can be based on the preset junction temperature T j0 To illuminate the light-emitting device to the target color, it is necessary to determine the duty cycle of each channel at the preset junction temperature.

[0136] The reference junction temperature brightness of each channel can be obtained according to the following formula (1).

[0137]

[0138] Among them, Yprimary is the primary color brightness of each primary color corresponding to each channel, T j,primary is the junction temperature of each primary color corresponding to each channel, Y ref is the reference junction temperature brightness of each channel, f(T j,primary ) is the junction temperature T j,primary The corresponding relative luminous intensity refers to the ratio of the maximum brightness at this junction temperature to the brightness at the reference junction temperature.

[0139] Among them, different light-emitting devices have different corresponding junction temperature-relative luminous intensity change curves. The junction temperature-relative luminous intensity change curve refers to the change of relative luminous intensity with the change of junction temperature. You can first determine the junction temperature-relative luminous intensity change curve corresponding to the model of the light-emitting device according to the model, such as Figure 7 As shown, in Figure 7 In the junction temperature-relative luminous intensity variation curve, the horizontal axis is the junction temperature, and the vertical axis is the relative luminous intensity. When the junction temperature is determined, the relative luminous intensity corresponding to the junction temperature can be determined based on the junction temperature-relative luminous intensity variation curve.

[0140] You can use Y primaryR and T j,primaryR Substitute into formula (1) to get the reference junction temperature brightness Y of the R channel refR ; Y primaryG and T j,orimaryG Substitute into formula (1) to get the reference junction temperature brightness Y of channel G refG ; Y primaryB and T j,primaryB Substitute into formula (1) to get the reference junction temperature brightness Y of channel B refB .

[0141] Optionally, the duty cycle of each channel can be obtained by the following formula (2) and formula (3).

[0142] Y maxout =Y ref *f(T j )Formula (2)

[0143]

[0144] Among them, T j is the junction temperature, Y ref is the reference junction temperature brightness of each channel, obtained by formula (1), Y maxout is the maximum brightness of each channel at the junction temperature, and Y is the brightness of each channel.

[0145] Specifically, the preset junction temperature T j0 And the reference junction temperature brightness Y of the R channel refR Substitute into formula (2) to obtain the preset junction temperature Tj0 The maximum brightness Y of the lower R channel maxiutR0 , and Y maxoutR0 Substitute the theoretical brightness Y1 of the R channel into formula (3) to obtain the value at the preset junction temperature T j0 Duty cycle D of the lower R channel R . Set the preset junction temperature and the reference junction temperature brightness Y of the G channel refG Substitute into formula (2) to obtain the preset junction temperature T j0 The maximum brightness Y of the lower G channel maxoutG0 , and Y maxoutG0 Substituting the theoretical brightness Y2 of the G channel into formula (3) yields the value at the preset junction temperature T j0 Duty cycle D of lower G channel G . Set the preset junction temperature T j0 And the reference junction temperature brightness Y of channel B refB Substituting into formula (2) we can get the maximum brightness Y of channel B at the preset junction temperature. maxoutB0 , and Y maxoutB0 Substituting the theoretical brightness Y1 of channel B into formula (3) yields the value at the preset junction temperature T j0 Duty cycle D of lower B channel B .

[0146] S202 : After lighting the light-emitting device based on the duty cycle of each channel at a preset junction temperature, obtain the current junction temperature of the light-emitting device at a target color.

[0147] Specifically, the duty cycle D of the R channel can be R Light up the R channel, based on the duty cycle D of the G channel G Light up the G channel based on the duty cycle D of the B channel. B Light up channel B. After lighting up the light-emitting device, the current junction temperature T of the light-emitting device can be measured. j1 , the current junction temperature is the current junction temperature under the target color.

[0148] Figure 8 A schematic diagram of the process flow of the third color calibration processing method provided in the embodiment of the present application is shown as follows: Figure 8 As shown, the above S103 determines the current duty cycle of each channel at the current junction temperature according to the current junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color, which may include:

[0149] S301 : Determine the relative luminous intensity corresponding to each primary color at the current junction temperature according to the current junction temperature.

[0150] Relative luminous intensity refers to the ratio of the maximum brightness at a certain junction temperature to the brightness at a reference junction temperature. The relative luminous intensity of each primary color at the current junction temperature can be determined based on the junction temperature-relative luminous intensity curve.

[0151] Then, at the current junction temperature T j1 The relative luminous intensity corresponding to the R primary color is f(T j1R ), the relative luminous intensity corresponding to the G primary color is f(T j1G ), the relative luminous intensity corresponding to the B primary color is f(T j1B ).

[0152] S302 : The product of the relative luminous brightness corresponding to each primary color and the reference junction temperature brightness of each channel is taken as the maximum brightness of each channel at the current junction temperature.

[0153] The reference junction temperature brightness of each channel is obtained by the aforementioned formula (1).

[0154] Specifically, the relative luminous intensity corresponding to the R primary color can be f(T j1R ) and the reference junction temperature brightness Y of the R channel refR Substitute into the above formula (2) to get the current junction temperature T j1 The maximum brightness Y of the lower R channel maxoutR1 ; The relative luminous intensity corresponding to the G primary color is f(T j1G ) and the reference junction temperature brightness Y of the G channel refG Substitute into the above formula (2) to get the current junction temperature T j1 The maximum brightness Y of the lower R channel maxoutG1 ; The relative luminous intensity corresponding to the B primary color is f(T j1B ) and the reference junction temperature brightness Y of the R channel refR Substitute into the above formula (2) to get the current junction temperature T j1 The maximum brightness Y of the lower B channel maxoutB1 .

[0155] S303 : Divide the theoretical brightness of each channel by the maximum brightness of each channel at the current junction temperature to obtain the current duty cycle of each channel.

[0156] Specifically, Y maxoutR1 Substitute the theoretical brightness Y1 of the R channel into formula (3) to obtain the current duty cycle D1 of the R channel; maxoutG1 Substitute the theoretical brightness Y2 of the G channel into formula (3) to obtain the current duty cycle D2 of the G channel; maxiutB1 Substituting the theoretical brightness Y3 of channel B into formula (3) yields the current duty cycle D3 of channel B.

[0157] In this embodiment, the current duty cycle of the current junction temperature is recalculated based on the current junction temperature, so that the light-emitting device is subsequently re-lit based on the current duty cycle of each channel to obtain a mixed color output result.

[0158] Figure 9A flowchart of the fourth color calibration processing method provided in the embodiment of the present application is shown as follows: Figure 9 As shown, the above S104, determining the new reference junction temperature brightness of each channel and the junction temperature offset of each channel according to the color mixing output result, the primary color information of each primary color, and the current duty cycle of each channel, may include:

[0159] S401 : Determine CIE-XYZ coordinates of the mixed color output according to the mixed color output color coordinates and the mixed color output brightness in the mixed color output result.

[0160] Specifically, the CIE-XYZ coordinates of the mixed color output can be calculated using the following formula (IV).

[0161]

[0162] Where (x, y, z) is the color coordinate, Y is the brightness, and (X, Y, Z) is the coordinate in the CIE-XYZ coordinate system.

[0163] Specifically, the mixed color output color coordinates (x MixingOutput ,y MixingOutput ,z MixingOutput ) and the mixed color output brightness Y MixtingOutput Substituting into the above formula (4), we can get the CIE-XYZ coordinates of the mixed color output (X MixingOutput , Y MixingOutput , Z MixingOutput ).

[0164] S402 : Determine the actual maximum brightness of each channel of the mixed color output according to the CIE-XYZ coordinates of the mixed color output, the primary color coordinates in the primary color information of each primary color, and the current duty cycle of each channel.

[0165] Specifically, the actual brightness of each channel can be obtained according to formula (5), and then the actual maximum brightness of each channel can be obtained using the above formula (3) according to the actual brightness of each channel and the current duty cycle of each channel.

[0166]

[0167] Among them, (X MixingOutput , Y MixingOutput , Z MixingOutput ) are the CIE-XYZ coordinates of the color mixing output, (x1, y1, z1) are the primary color coordinates of the R primary color, (x2, y2, z2) are the primary color coordinates of the G primary color, (x3, y3, z3) are the primary color coordinates of the B primary color, Y1′ is the actual brightness of the R channel, Y2′ is the actual brightness of the G channel, and Y3′ is the actual brightness of the B channel. The actual brightness of each channel is Y1′, Y2′, and Y3′ respectively.

[0168] Optionally, after obtaining the actual brightness of each channel, the actual brightness Y1′ of the R channel is divided by the current duty cycle D1 of the R channel to obtain the actual maximum brightness Y′ of the R channel. P1 ; The actual brightness of the G channel Y2' is divided by the current duty cycle of the G channel D2 to obtain the actual maximum brightness of the B channel Y' P2 ; The actual brightness of channel B Y3' is divided by the current duty cycle of channel B D3 to obtain the actual maximum brightness of channel B Y' P3 The actual maximum brightness of each channel is Y′ P1 , Y′ P2 , Y′ P3 .

[0169] S403 , obtaining a new reference junction temperature brightness and a junction temperature offset of each channel according to the actual maximum brightness of each channel, the primary color brightness of each primary color, the primary color junction temperature of each primary color, and the junction temperature during color mixing output.

[0170] Specifically, the following formula (VI) can be used to obtain the new reference junction temperature of each channel and the junction temperature offset of each channel.

[0171]

[0172] Among them, Y primary is the primary color brightness of each primary color, T j,primary is the primary color junction temperature of each primary color, T j,MixingOutput is the junction temperature when the mixed color output is applied, Y′ P is the actual maximum brightness of each channel, Y ref ′ is the new reference junction temperature of each channel, ΔT j is the junction temperature offset of each channel.

[0173] Specifically, the actual maximum brightness Y′ of the R channel can be P1 , the primary color brightness Y of the R primary color primaryR , R primary color junction temperature T j,primaryR And the junction temperature T when mixing color output j,MixingOutput Substitute them into formula (6) to obtain the new reference junction temperature brightness Y' of the R channel refR And the junction temperature offset ΔT of each channel jR .

[0174] The actual maximum brightness Y′ of the G channel P2 , the primary color brightness Y of the G primary color primaryG 、G primary color junction temperature T j,primaryG And the junction temperature T when mixing color output j,MixingOutput Substitute them into formula (6) to obtain the new reference junction temperature brightness Y' of channel G refGAnd the junction temperature offset ΔT of each channel jG .

[0175] The actual maximum brightness Y′ of the B channel P3 , the primary color brightness Y of the primary color B primaryB 、B primary color junction temperature T j,primaryB And the junction temperature T when mixing color output j,MixingOutput Substitute them into formula (6) to obtain the new reference junction temperature brightness Y' of channel B refB And the junction temperature offset ΔT of each channel jB .

[0176] In this embodiment, the light-emitting device is re-lit based on the current duty cycle of each channel at the current junction temperature to obtain the mixed color output result, and the actual brightness and actual maximum brightness obtained based on the mixed color output result are also more accurate, and the primary color information of each primary color is also accurate. Therefore, the junction temperature offset of each channel and the new reference junction temperature brightness of each channel calculated based on the accurate primary color information of each primary color and the accurate actual maximum brightness are also more accurate.

[0177] Figure 10 A flowchart of the fifth color calibration processing method provided in the embodiment of the present application is shown as follows: Figure 10 As shown, in the above S104, according to the new reference junction temperature brightness of each channel, the junction temperature offset of each channel and the current junction temperature, a new maximum brightness of each channel at the current junction temperature and a new current duty cycle are obtained, which may include:

[0178] S501 : Taking the sum of the current junction temperature and the junction temperature offset of each channel as the new current junction temperature of each channel, and determining a new relative luminous intensity corresponding to each new current junction temperature.

[0179] Specifically, the current junction temperature T j1 +ΔT jR Get the new current junction temperature of the R channel and determine the new current junction temperature T j1 +ΔT jR The corresponding new relative luminous intensity f(T j1 +ΔT jR ). The current junction temperature T j1 +ΔT jG Get the new current junction temperature of the G channel and determine the new current junction temperature T j1 +ΔT jG The corresponding new relative luminous intensity f(T j1 +ΔT jG ). The current junction temperature T j1 +ΔT jB Get the new current junction temperature of channel B and determine the new current junction temperature T j1 +ΔTjB The corresponding new relative luminous intensity f(T j +ΔT jB ).

[0180] S502: The product of each new relative luminous intensity and the new reference junction temperature brightness of each primary color is used as the new maximum brightness of each channel.

[0181] Specifically, use formula (2) to convert f(T j1 +ΔT jR ) and the new reference junction temperature brightness Y′ of the R channel refR The product is the new maximum brightness Y′ of the R channel maxoutR . f(T j1 +ΔT jG ) and the new reference junction temperature brightness Y′ of the G channel refG The product is the new maximum brightness Y′ of the G channel maxoutG . f(T j1 +ΔT jB ) and the new reference junction temperature brightness Y′ of channel B refB The product is the new maximum brightness Y′ of the B channel maxoutB The new maximum brightness of each channel is Y′ maxoutR , Y′ maxoutG , Y′ maxoutB .

[0182] S503 : Divide the theoretical brightness of each channel by the new maximum brightness of each channel to obtain a new current duty cycle of each channel.

[0183] Specifically, the new current duty cycle can be obtained by using the above formula (III). The theoretical brightness of the R channel Y1 can be divided by the new maximum brightness of the R channel Y' maxoutR , get the new current duty cycle D'1 of the R channel; divide the theoretical brightness Y2 of the G channel by the new maximum brightness Y' of the G channel maxoutG , get the new current duty cycle D'2 of the G channel; divide the theoretical brightness Y3 of the B channel by the new maximum brightness Y' of the B channel maxoutB , and obtain the new current duty cycle D′3 of channel b. That is, the new current duty cycles of each channel are D′1, D′2, and D′3.

[0184] In this embodiment, after obtaining the new duty cycle of each channel, the light-emitting device is illuminated based on the new duty cycle of each channel, and the new color mixing output result can be measured, and whether the error between the new color mixing output and the target color meets the preset error range.

[0185] Figure 11 A flow chart of the sixth color calibration processing method provided in the embodiment of the present application is shown as follows: Figure 11 As shown, determining the theoretical brightness of each channel corresponding to the target color in S102 may include:

[0186] S601: Determine the RGB coordinates of a target color of a light-emitting device, and convert the RGB coordinates of the target color into device coordinates in a device color space.

[0187] Among them, the coordinates of the target color set by the user generally use the coordinates in the linear RGB color space or the coordinates in the standard RGB color space after compression that conforms to the color perception of the human eye. Therefore, the RGB coordinates can be the coordinates of the target color in the linear RGB color space, or the coordinates in the standard RGB color space after compression that conforms to the color perception of the human eye. It is necessary to convert the RGB coordinates into device coordinates in the device color space, so that each light-emitting device can have the same color rendering condition, and the color of the light-emitting device is consistent with the color of the standard color space.

[0188] For example, the device coordinates obtained after converting the RGB coordinates of the target color are (R, G, B) LED .

[0189] S602 : Determine the theoretical brightness of each channel corresponding to the target color according to the reference brightness of each channel of the synthesized reference white point in the standard RGB color space and the device coordinates.

[0190] Among them, the standard RGB color space can be a variety of different standard RGB color spaces, such as sRGB color space, AppleRGB color space, etc. Before determining the target color RGB coordinates of the light-emitting device, it is necessary to first select a standard RGB space. The reference white point under different standard RGB color spaces will also be different.

[0191] The reference white point is a standard point in the standard RGB color space.

[0192] The theoretical brightness of each channel corresponding to the target color can be obtained using the following formula (VII).

[0193]

[0194] Among them, (R, G, B) LED The device coordinates obtained by converting the RGB coordinates of the target color, Y w1 、Y w2 、Y w3 is the reference brightness of each channel for the synthetic reference white point, and Y1, Y2, and Y3 are the theoretical brightness of each channel corresponding to the target color.

[0195] Optionally, when the coordinates of the target color in the CIE-XYZ coordinate system are known, the theoretical brightness of each channel corresponding to the target color can also be calculated using the following formula (8).

[0196]

[0197] Where (X, Y, Z) represents the coordinates in the CIE-XYZ coordinate system. represents the device coordinates obtained by converting the RGB coordinates of the target color. (x1, y1, z1), (x2, y2, z2), and (x3, y3, z3) represent the primary color coordinates of each primary color of the light-emitting device. Y1, Y2, and Y3 represent the theoretical luminance of each channel corresponding to the target color. Substituting the CIE-XYZ coordinates of the target color and the primary color coordinates of each primary color of the light-emitting device into formula (8) above yields the theoretical luminance of each channel corresponding to the target color of the light-emitting device.

[0198] In this embodiment, arbitrary RGB color setting can be achieved through coordinate conversion, and there is no need to set a color coordinate data set for the target color, which can reduce the storage resources occupied by the target color coordinate storage. Moreover, since this process is a transformation of the coordinate system, the color setting is continuous, and the color resolution and transition interval can be set arbitrarily to achieve continuous color switching. In addition, this method is consistent with the matrix order of the target color duty cycle calculation, and will not bring about the problem of increased computing resource usage.

[0199] Figure 12 A flow chart of the seventh color calibration processing method provided in the embodiment of the present application is shown as follows: Figure 12 As shown, the above S601, converting the RGB coordinates of the target color into device coordinates in the device color space, may include:

[0200] S701 , determining the reference brightness of each channel corresponding to the reference white point according to the CIE-XYZ coordinates of the reference white point in the standard RGB color space and the primary color coordinates of each primary color.

[0201] The reference brightness of each channel of the synthetic reference white point can be obtained using the following formula (9).

[0202]

[0203] Among them, (X W , Y W , Z W ) is the CIE-XYZ coordinate of the reference white point, (x1, y1, z1), (x2, y2, z2), (x3, y3, z3) are the primary color coordinates of each primary color of the light emitting device, Y w1 The R channel reference brightness of the synthetic reference white point, Y w2 The G channel reference brightness of the synthetic reference white point, Y w3The B channel reference brightness of the synthetic reference white point.

[0204] S702: Determine a first conversion matrix according to primary color information in the standard RGB color space.

[0205] The first conversion matrix is ​​a conversion matrix between the coordinates in the linear RGB space corresponding to the standard RGB and the CIE-XYZ coordinates. The first conversion matrix is ​​shown in the following formula (10).

[0206]

[0207] Among them, (x r ,y r , z r )(x g ,y g , z g )(x b ,y b , z b ) is the color coordinate of each primary color in the standard RGB color space, Y r 、Y g 、Y b are the brightness of each primary color in the standard RGB color space, and M is the first conversion matrix.

[0208] S703 : Determine a second conversion matrix according to primary color information of each primary color when the light-emitting device lights up the primary color and reference brightness of each channel corresponding to the reference white point.

[0209] The second conversion matrix is ​​a conversion matrix between the coordinates in the light emitting device color space and the CIE-XYZ coordinates. Specifically, the second conversion matrix is ​​shown in the following formula (11).

[0210]

[0211] Among them, (x1, y1, z1), (x2, y2, z2), (x3, y3, z3) are the primary color coordinates of each primary color of the light-emitting device, and Y w1 、Y w2 、Y w3 are the reference luminances of each channel of the synthetic reference white point, and M′ is the second conversion matrix.

[0212] S704 : Convert the RGB coordinates into device coordinates according to the first conversion matrix and the second conversion matrix.

[0213] Specifically, two conversion formulas can be obtained based on the first conversion matrix and the second conversion matrix, wherein the first conversion formula, i.e., the following formula (12), is a formula for converting coordinates in a linear RGB color space into device coordinates, and the second conversion formula, i.e., the following formula (13), is a formula for converting coordinates in a compressed standard RGB color space that conforms to human eye color perception into device coordinates.

[0214]

[0215] Where (R, G, B) is the coordinate in the linear color space, M is the first transformation matrix, M' is the second transformation matrix, (R, G, B) LED is the device coordinate.

[0216]

[0217] Among them, (r, g, b) are the coordinates in the standard RGB color space after compression that conforms to the color perception of the human eye, M is the first conversion matrix, M' is the second conversion matrix, (R, G, B) LED is the device coordinate.

[0218] Specifically, if the RGB coordinates of the target color are coordinates in a linear color space, then formula (12) is used for coordinate conversion; if the RGB coordinates of the target color are coordinates in a standard RGB color space that is compressed and conforms to the color perception of the human eye, then formula (13) is used for coordinate conversion.

[0219] Optionally, the above-mentioned specific embodiment is a calibration process for the target color of the light-emitting device, that is, the calibrated junction temperature offset of each channel of the light-emitting device and the calibrated reference junction temperature brightness of each channel can be obtained through the above-mentioned specific embodiment. After the calibration is completed, the calibrated junction temperature offset of each channel, the calibrated reference junction temperature brightness of each channel, and the primary color information of each primary color of the light-emitting device are written into the chip of the light-emitting device, so that the user only needs to determine the target duty cycle when lighting the light-emitting device to the target color based on the RGB coordinates of the target color selected by the user. The specific process is as follows:

[0220] Step 1: Obtain the RGB coordinates of the target color of the light-emitting device selected by the user and convert the RGB coordinates of the target color into device coordinates in the light-emitting device color space according to the first conversion matrix and the second conversion matrix. The specific coordinate conversion process has been described in S704 above and will not be repeated here.

[0221] Step 2: Determine the target theoretical brightness of each channel corresponding to the target color based on the device coordinates and the reference brightness of each channel of the reference white point in the synthetic standard RGB color space.

[0222] Specifically, it can be calculated using the above formula (VII), which will not be described here in detail.

[0223] Step 3: Determine the target duty cycle of each channel based on the calibrated junction temperature offset of each channel, the calibrated reference junction temperature brightness of each channel, the junction temperature to be illuminated, and the target theoretical brightness of each channel.

[0224] Specifically, the sum of the junction temperature to be lit and the calibrated junction temperature offset of each channel is used as the compensated junction temperature of each channel, and the relative luminous intensity corresponding to the compensated junction temperature of each channel is determined. The product of the relative luminous intensity corresponding to each channel and the calibrated reference junction temperature brightness of each channel is used as the maximum brightness of each channel. Specifically, this can be calculated using the following formula (14).

[0225] Y′ maxout =Y′ ref *f(T j2 +ΔT j ) Formula (14)

[0226] Among them, T j2 is the junction temperature to be lit, ΔT j is the calibrated junction temperature offset of each channel, Y′ ref The reference junction temperature brightness of each channel is calibrated. The calibrated junction temperature offset of each channel can be ΔT jR , ΔT jG , ΔT jB The calibrated reference junction temperature brightness of each channel can be Y′ refR , Y′ refG , Y′ refB , Y′ maxout is the maximum brightness of each channel.

[0227] Optionally, the target duty cycle of each channel is obtained according to the maximum brightness of each channel and the target theoretical brightness of each channel. Specifically, it can be calculated using the following formula (15).

[0228]

[0229] Among them, Y is the target theoretical brightness of each channel obtained in step 2, Y′ maxout is the maximum brightness of each channel using formula (14).

[0230] Optionally, after obtaining the target duty cycle of each channel, the electronic device can control the light-emitting device to light up each channel based on the target duty cycle of each channel, so that the difference between the mixed color output result output by the light-emitting device and the target color is very small.

[0231] Figure 13 A complete flow chart of a color calibration processing method provided in an embodiment of the present application is shown in FIG. Figure 13As shown, the complete calibration process for the lighting device is as follows:

[0232] S801. Detect the model of the light-emitting device.

[0233] S802, light up the base color.

[0234] S803: Detect primary color information of each primary color.

[0235] Specifically, the primary color coordinates, primary color structure, and primary color brightness of each primary color may be detected.

[0236] S804: Determine whether the primary color measurement is completed.

[0237] Specifically, if the primary color measurement is completed, the following S805 is executed. If the primary color measurement is not completed, the process returns to S802.

[0238] S805. Select the standard RGB color space.

[0239] After selecting a standard RGB color space, the reference white point under the selected standard RGB color space may be determined.

[0240] S806: Calculate a first conversion matrix and a second conversion matrix according to the stored values.

[0241] The specific calculation process is as described in steps S701 to S703 above, which will not be described in detail here.

[0242] S807: Select a target color for calibration.

[0243] S808: Calculate the theoretical brightness of each channel corresponding to the target color.

[0244] The calculation of the theoretical brightness of each channel corresponding to the target color has been described in detail in S601 to S602 above and will not be repeated here.

[0245] S809: Determine whether the matrix solution is abnormal.

[0246] Specifically, if there is no exception in the solution, execute the following S8010; if there is an exception in the solution, return to execute S802.

[0247] S8010: Determine the duty cycle of each channel at the preset junction temperature according to the preset junction temperature, and test-light the light-emitting device.

[0248] The specific process is as described in steps S201 to S202 above, which will not be described in detail here.

[0249] S8011. Read the current junction temperature, recalculate the current duty cycle of each channel at the current junction temperature, and light up the light-emitting device again.

[0250] S8012. Measure the color mixing output result.

[0251] S8013. Calculate the junction temperature offset of each channel.

[0252] S8014: Determine whether the new color mixing output result is within a preset error range.

[0253] Specifically, if yes, execute the following S8015; if no, return to S8010.

[0254] S8015: Write the junction temperature offset of each channel and the primary color information of each primary color of the light-emitting device into the chip.

[0255] S8016: Determine whether calibration of all target colors is completed.

[0256] Specifically, if yes, then end; if no, then return to S807.

[0257] It is worth noting that the above steps have been described in detail in the aforementioned specific implementation methods and will not be repeated here.

[0258] Figure 14 A schematic diagram of a color calibration method provided in an embodiment of the present application is shown in FIG. Figure 14 As shown, the device includes:

[0259] An acquisition module 801 is configured to acquire primary color information of each primary color when a light emitting device lights up a primary color, wherein the primary color information includes primary color brightness, primary color junction temperature, and primary color coordinates;

[0260] The first determination module 802 is used to determine the theoretical brightness of each channel corresponding to the target color;

[0261] The second determination module 803 is used to obtain the current junction temperature of the light-emitting device at the target color, and determine the current duty cycle of each channel at the current junction temperature based on the current junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color, and obtain the color mixing output result of the light-emitting device after the light-emitting device is illuminated based on the current duty cycle, wherein the color mixing output result includes the color mixing output color coordinates, the color mixing output brightness, and the junction temperature during the color mixing output;

[0262] a third determining module 804 configured to determine, based on the color mixing output result, the primary color information of each primary color, and the current duty cycle of each channel, a new reference junction temperature brightness of each channel and a junction temperature offset of each channel; and to obtain, based on the new reference junction temperature brightness of each channel, the junction temperature offset of each channel, and the current junction temperature, a new maximum brightness and a new current duty cycle of each channel at the current junction temperature; and to re-light the light-emitting device based on each new current duty cycle to obtain a new color mixing output result;

[0263] If the new color mixing output result meets the preset error range, the junction temperature offset of each channel is used as the calibrated junction temperature offset of each channel of the light-emitting device, and the new reference junction temperature brightness of each channel is used as the calibrated reference junction temperature brightness of each channel.

[0264] Optionally, the second determining module 803 is specifically configured to:

[0265] Determining the duty cycle of each channel at the preset junction temperature according to the preset junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color;

[0266] After the light-emitting device is lit based on the duty cycle of each channel at the preset junction temperature, the current junction temperature of the light-emitting device at the target color is obtained.

[0267] Optionally, the second determining module 803 is specifically configured to:

[0268] Determining, according to the current junction temperature, a relative luminous intensity corresponding to each primary color at the current junction temperature, wherein the relative luminous intensity is used to indicate a ratio of a maximum brightness at the junction temperature to a brightness at a reference junction temperature;

[0269] The product of the relative luminous intensity corresponding to each primary color and the reference junction temperature brightness of each channel is taken as the maximum brightness of each channel at the current junction temperature;

[0270] Divide the theoretical brightness of each channel by the maximum brightness of each channel at the current junction temperature to obtain the current duty cycle of each channel.

[0271] Optionally, the third determining module 804 is specifically configured to:

[0272] Determining CIE-XYZ coordinates of the mixed color output according to the mixed color output color coordinates and the mixed color output brightness in the mixed color output result;

[0273] Determine the actual maximum brightness of each channel of the mixed color output according to the CIE-XYZ coordinates of the mixed color output, the primary color coordinates in the primary color information of each primary color, and the current duty cycle of each channel;

[0274] According to the actual maximum brightness of each channel, the primary color brightness of each primary color, the primary color junction temperature of each primary color and the junction temperature during color mixing output, a new reference junction temperature brightness of each channel and a junction temperature offset of each channel are obtained.

[0275] Optionally, the third determining module 804 is specifically configured to:

[0276] Determine the actual brightness of each channel according to the CIE-XYZ coordinates of the color mixing output and the primary color coordinates in the primary color information of each primary color;

[0277] The actual maximum brightness of each channel is determined according to the actual brightness of each channel and the current duty cycle of each channel.

[0278] Optionally, the third determining module 804 is specifically configured to:

[0279] Taking the sum of the current junction temperature and the junction temperature offset of each channel as the new current junction temperature of each channel, and determining a new relative luminous intensity corresponding to each new current junction temperature;

[0280] The product of each of the new relative luminous intensity and the new reference junction temperature brightness of each primary color is used as the new maximum brightness of each channel;

[0281] Divide the theoretical brightness of each channel by the new maximum brightness of each channel to obtain the new current duty cycle of each channel.

[0282] Optionally, the first determining module 802 is specifically configured to:

[0283] Determine the RGB coordinates of a target color of a light-emitting device, and convert the RGB coordinates of the target color into device coordinates in a device color space;

[0284] The theoretical brightness of each channel corresponding to the target color is determined according to the reference brightness of each channel of the synthetic reference white point in the standard RGB color space and the device coordinates.

[0285] Optionally, the first determining module 802 is specifically configured to:

[0286] Determine the reference brightness of each channel corresponding to the reference white point based on the CIE-XYZ coordinates of the reference white point in the standard RGB color space and the primary color coordinates of each primary color;

[0287] Determine a first conversion matrix based on the primary color information in the standard RGB color space, where the first conversion matrix is ​​a conversion matrix between coordinates in the linear RGB space corresponding to the standard RGB and CIE-XYZ coordinates;

[0288] Determine a second conversion matrix based on primary color information of each primary color when the light-emitting device lights up the primary color and the reference brightness of each channel corresponding to the reference white point, where the second conversion matrix is ​​a conversion matrix between coordinates in the color space of the light-emitting device and CIE-XYZ coordinates;

[0289] The RGB coordinates are converted into the device coordinates according to the first conversion matrix and the second conversion matrix.

[0290] Optionally, the method further includes a fourth determining module 805, configured to:

[0291] Obtaining the RGB coordinates of the target color of the light-emitting device selected by the user, and converting the RGB coordinates of the target color into device coordinates in the color space of the light-emitting device according to the first conversion matrix and the second conversion matrix;

[0292] Determining a target theoretical brightness of each channel corresponding to the target color based on the device coordinates and the reference brightness of each channel of a reference white point in a synthetic standard RGB color space;

[0293] The target duty cycle of each channel is determined based on the calibrated junction temperature offset of each channel, the calibrated reference junction temperature brightness of each channel, the junction temperature to be illuminated, and the target theoretical brightness of each channel.

[0294] Figure 15 This is a structural block diagram of an electronic device 900 provided in an embodiment of the present application. Figure 15 As shown, the electronic device may include: a processor 901 and a memory 902.

[0295] Optionally, a bus 903 may also be included, wherein the memory 902 is used to store machine-readable instructions executable by the processor 901. When the electronic device 900 is running, the processor 901 communicates with the memory 902 through the bus 903. When the machine-readable instructions are executed by the processor 901, the method steps in the above method embodiment are performed.

[0296] An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method steps in the above-mentioned color calibration method embodiment are executed.

[0297] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0298] In addition, the functional units in the various embodiments of the present application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0299] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the protection scope of the present application.

Claims

1. A color calibration processing method, characterized in that: The method comprises: Acquire primary color information of each primary color when the light emitting device lights up the primary color, the primary color information including: primary color brightness, primary color junction temperature, and primary color color coordinates; Determine the theoretical brightness of each channel corresponding to the target color of the light-emitting device; Obtaining a current junction temperature of the light-emitting device at the target color, and determining a current duty cycle of each channel at the current junction temperature based on the current junction temperature, a reference junction temperature brightness of each channel, and a theoretical brightness of each channel corresponding to the target color, and obtaining a color mixing output result of the light-emitting device after lighting the light-emitting device based on the current duty cycle, the color mixing output result including the color mixing output color coordinates, the color mixing output brightness, and the junction temperature during the color mixing output; Determining a new reference junction temperature brightness of each channel and a junction temperature offset of each channel based on the color mixing output result, the primary color information of each primary color, and the current duty cycle of each channel; obtaining a new maximum brightness and a new current duty cycle of each channel at the current junction temperature based on the new reference junction temperature brightness of each channel, the junction temperature offset of each channel, and the current junction temperature; and re-lighting the light-emitting device based on each new current duty cycle to obtain a new color mixing output result; If the new color mixing output result meets the preset error range, the junction temperature offset of each channel is used as the calibrated junction temperature offset of each channel of the light-emitting device, and the new reference junction temperature brightness of each channel is used as the calibrated reference junction temperature brightness of each channel.

2. The color calibration method according to claim 1, characterized in that: The obtaining of the current junction temperature of the light emitting device at the target color includes: Determining the duty cycle of each channel at the preset junction temperature according to the preset junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color; After the light-emitting device is lit based on the duty cycle of each channel at the preset junction temperature, the current junction temperature of the light-emitting device at the target color is obtained.

3. The color calibration method according to claim 1, wherein: The determining, based on the current junction temperature, the reference junction temperature brightness of each channel, and the theoretical brightness of each channel corresponding to the target color, a current duty cycle of each channel at the current junction temperature includes: Determining, according to the current junction temperature, a relative luminous intensity corresponding to each primary color at the current junction temperature, wherein the relative luminous intensity is used to indicate a ratio of a maximum brightness at the junction temperature to a brightness at a reference junction temperature; The product of the relative luminous intensity corresponding to each primary color and the reference junction temperature brightness of each channel is taken as the maximum brightness of each channel at the current junction temperature; Divide the theoretical brightness of each channel by the maximum brightness of each channel at the current junction temperature to obtain the current duty cycle of each channel.

4. The color calibration method according to claim 1, wherein: Determining a new reference junction temperature brightness of each channel and a junction temperature offset of each channel according to the color mixing output result, the primary color information of each primary color, and the current duty cycle of each channel includes: Determining CIE-XYZ coordinates of the mixed color output according to the mixed color output color coordinates and the mixed color output brightness in the mixed color output result; Determine the actual maximum brightness of each channel of the mixed color output according to the CIE-XYZ coordinates of the mixed color output, the primary color coordinates in the primary color information of each primary color, and the current duty cycle of each channel; According to the actual maximum brightness of each channel, the primary color brightness of each primary color, the primary color junction temperature of each primary color and the junction temperature during color mixing output, a new reference junction temperature brightness of each channel and a junction temperature offset of each channel are obtained.

5. The color calibration method according to claim 4, characterized in that: Determining the actual maximum brightness of each channel of the mixed color output according to the CIE-XYZ coordinates of the mixed color output, the primary color coordinates in the primary color information of each primary color, and the current duty cycle of each channel includes: Determining the actual brightness of each channel according to the CIE-XYZ coordinates of the color mixing output and the primary color coordinates in the primary color information of each primary color; The actual maximum brightness of each channel is determined according to the actual brightness of each channel and the current duty cycle of each channel.

6. The color calibration method according to claim 1, wherein: The obtaining, according to the new reference junction temperature brightness of each channel, the junction temperature offset of each channel, and the current junction temperature, a new maximum brightness and a new current duty cycle of each channel at the current junction temperature includes: Taking the sum of the current junction temperature and the junction temperature offset of each channel as the new current junction temperature of each channel, and determining a new relative luminous intensity corresponding to each new current junction temperature; The product of each of the new relative luminous intensity and the new reference junction temperature brightness of each primary color is used as the new maximum brightness of each channel; Divide the theoretical brightness of each channel by the new maximum brightness of each channel to obtain the new current duty cycle of each channel.

7. The color calibration method according to claim 1, characterized in that: Determining the theoretical brightness of each channel corresponding to the target color includes: Determine the RGB coordinates of a target color of a light-emitting device, and convert the RGB coordinates of the target color into device coordinates in a device color space; The theoretical brightness of each channel corresponding to the target color is determined according to the reference brightness of each channel of the synthetic reference white point in the standard RGB color space and the device coordinates.

8. The color calibration method according to claim 7, characterized in that: The step of converting the RGB coordinates of the target color into device coordinates in a device color space includes: Determine the reference brightness of each channel corresponding to the reference white point based on the CIE-XYZ coordinates of the reference white point in the standard RGB color space and the primary color coordinates of each primary color; Determine a first conversion matrix based on the primary color information in the standard RGB color space, where the first conversion matrix is ​​a conversion matrix between coordinates in the linear RGB space corresponding to the standard RGB and CIE-XYZ coordinates; Determine a second conversion matrix based on primary color information of each primary color when the light-emitting device lights up the primary color and the reference brightness of each channel corresponding to the reference white point, where the second conversion matrix is ​​a conversion matrix between coordinates in the color space of the light-emitting device and CIE-XYZ coordinates; The RGB coordinates are converted into the device coordinates according to the first conversion matrix and the second conversion matrix.

9. The color calibration method according to any one of claims 1 to 8, characterized in that: Also includes: Obtaining the RGB coordinates of the target color of the light-emitting device selected by the user, and converting the RGB coordinates of the target color into device coordinates in the color space of the light-emitting device according to the first conversion matrix and the second conversion matrix; Determining a target theoretical brightness of each channel corresponding to the target color based on the device coordinates and the reference brightness of each channel of a reference white point in a synthetic standard RGB color space; The target duty cycle of each channel is determined based on the calibrated junction temperature offset of each channel, the calibrated reference junction temperature brightness of each channel, the junction temperature to be illuminated, and the target theoretical brightness of each channel.

10. An electronic device, characterized in that: The system comprises a memory and a processor, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, the steps of the color calibration processing method according to any one of claims 1 to 9 are implemented.

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