Color calibration method and related device

Abstract

The invention provides a color calibration method. The method comprises the following steps: determining a second Lab value in a Lab color space corresponding to standard light; setting the white point coordinate of the first to-be-calibrated screen as a second value, wherein second light emitted by the first to-be-calibrated screen at the second value corresponds to a second Lab value in the Lab color space; when the second light and the standard light are not consistent in human eye vision, obtaining a first input of the user; a third value is determined according to the first input, the white point coordinate of the first to-be-calibrated screen is set to be the third value, and third light emitted by the first to-be-calibrated screen at the third value is consistent with the standard light in human eye vision.

Description

Technical Field

[0001] The present application relates to the field of terminals, and in particular to a color calibration method and related devices. Background Art

[0002] Due to different materials and structures, different screens using the same white point coordinates will emit different white light. Before electronic devices are shipped out of the factory, manufacturers will use color calibration devices to calibrate the colors of the electronic devices to ensure that the screens of the electronic devices sold successively emit consistent light and guarantee the user's viewing experience. However, due to the problem of metameric failure, two screens that are determined to emit consistent light by the color calibration device may not be consistent in human vision, which makes it impossible for users to have consistent viewing experience, affecting the user experience. Summary of the invention

[0003] The present application provides a color calibration method and a related device.

[0004] In a first aspect, the present application provides a color calibration method, the method comprising: determining a second Lab value in a Lab color space corresponding to standard light; setting the white point coordinates of a first screen to be calibrated to a second value, and a second light emitted by the first screen to be calibrated with the second value corresponds to the second Lab value in the Lab color space; when the second light is visually inconsistent with the standard light, obtaining a first input from a user; determining a third value based on the first input, setting the white point coordinates of the first screen to be calibrated to a third value, and a third light emitted by the first screen to be calibrated with the third value is visually consistent with the standard light.

[0005] The device for implementing the method provided in the first aspect is a color calibration device. By implementing the method provided in the first aspect, the color calibration device can adjust the light emission of the screen to be calibrated to be consistent with the standard light in the Lab color space, and then the color calibration device can continue to adjust the screen to be calibrated based on user feedback so that the light emitted by the screen is consistent with the standard light in human vision, thereby ensuring the user's viewing experience.

[0006] In one embodiment, the method further includes: setting the white point coordinates of the first screen to be calibrated to a first value, the first light emitted by the first screen to be calibrated with the first value corresponds to a first Lab value in the Lab color space; determining a first mapping relationship based on the first value and the first Lab value; and obtaining a second value based on the second Lab value and the first mapping relationship.

[0007] The color calibration device can determine the mapping relationship from the Lab color space to the color coordinate system of the screen to be calibrated through a known white point coordinate and the corresponding detected Lab coordinate, and then find the second value that can make the screen to be calibrated emit standard light based on the above mapping relationship.

[0008] The color calibration device may provide some options corresponding to the coordinate axes of the Lab color space, referring to Table 1, for describing the difference between the light emitted by the screen to be calibrated and the standard light. In this way, the color calibration device may determine whether the light emitted by the current screen to be calibrated is consistent with the standard light through the above options, and if not, what the difference is, and then determine the new white point coordinates according to the above difference, so that the screen to be calibrated emits light that is consistent with the standard light in human vision. One or more of the above options selected by the user is the first input obtained from the user.

[0009] In one embodiment, determining the third value according to the first input includes: determining a third Lab value in the Lab color space according to the first input; and determining the third value according to the third Lab value and the first mapping relationship.

[0010] In one embodiment, determining a third Lab value in the Lab color space according to the first input includes: determining at least one of the following according to the first input: △L1, △a1, △b1; determining the third Lab value according to at least one of the following: △L1, △a1, △b1; △L1 indicates the difference in brightness between the second light and the standard light, △a1 indicates the difference in red and green between the second light and the standard light, and △b1 indicates the difference in yellow and blue between the second light and the standard light.

[0011] In one embodiment, before obtaining the first input of the user, the method also includes: obtaining the second input of the user; determining at least one of the following items based on the second input: △L2, △a2, △b2; determining a fourth Lab value based on at least one item: △L2, △a2, △b2; setting the white point coordinates of the first screen to be calibrated to the fourth value, and the first screen to be calibrated emits a fourth light with the fourth value, and the fourth value is obtained according to the fourth Lab value and the first mapping relationship; obtaining the first input of the user, including: obtaining the first input of the user when the fourth light and the standard light are visually inconsistent with the human eye.

[0012] In one embodiment, |ΔL1|=N0, |Δa1|=N0, |Δb1|=N0; |ΔL2|=N0, |Δa2|=N0, |Δb2|=N0.

[0013] In one embodiment, N0 is the smallest unit of the coordinate axis in the Lab color space.

[0014] The color calibration device reduces or increases the relevant coordinate axis by one unit each time to avoid missing the target Lab coordinate (ie, the third Lab value) and missing the situation where the light emitted by the screen to be calibrated is consistent with the standard light in human vision.

[0015] In one embodiment, |△L1|=N1, |△a1|=N1, |△b1|=N1; |△L2|=N2, |△a2|=N2, |△b2|=N2; N1>N2.

[0016] The color calibration device can also change the adjustment amount of the relevant coordinate axis. In particular, the color calibration device can sequentially reduce the adjustment amount, thereby quickly determining the target lab coordinates and avoiding missing the target lab coordinates.

[0017] In one embodiment, the standard light is obtained by emitting light from the screen of a device that is already publicly available.

[0018] In this way, manufacturers can ensure that the devices sold successively emit consistent light, guarantee the user's visual experience, and thus guarantee the user's usage experience, while reducing costs.

[0019] In one embodiment, the standard light is obtained by emitting light from a standard D65 light box.

[0020] In this way, inspectors do not need to select a device from publicly sold devices as a reference device, which can ensure that the standard light is not affected by the screen material and structure of the publicly sold device, and avoid screen aging of the publicly sold device causing standard light abnormalities, which directly leads to color calibration failure of the device to be calibrated.

[0021] In one embodiment, the method further includes: setting the white point coordinates of the second screen to be calibrated to a third value, the second screen to be calibrated is made of the same material as the first screen to be calibrated, and the light emitted by the second screen to be calibrated at the third value is consistent with the standard light in human eye vision.

[0022] In one embodiment, the second screen to be calibrated is from the same manufacturer as the first screen to be calibrated.

[0023] In one embodiment, the second screen to be calibrated is from the same production batch as the first screen to be calibrated.

[0024] In this way, the inspectors do not need to determine the white point coordinates corresponding to the standard light in the device one by one, which is conducive to saving costs and improving calibration efficiency.

[0025] In one embodiment, the method further comprises:

[0026] The white point coordinates of the second screen to be calibrated are set to a third value, the second screen to be calibrated has the same spectral characteristics as the first screen to be calibrated, and the light emitted by the second screen to be calibrated at the third value is consistent with the standard light in human eye vision.

[0027] In a second aspect, the present application provides an electronic device, comprising one or more processors and one or more memories; wherein the one or more memories are coupled to the one or more processors, and the one or more memories are used to store computer program code, and the computer program code includes computer instructions, and when the one or more processors execute the computer instructions, the electronic device executes the method described in the first aspect and any possible implementation method of the first aspect.

[0028] In a third aspect, an embodiment of the present application provides a chip system, which is applied to an electronic device, and the chip system includes one or more processors, which are used to call computer instructions so that the electronic device executes the method described in the first aspect and any possible implementation method of the first aspect.

[0029] In a fourth aspect, the present application provides a computer-readable storage medium comprising instructions, which, when executed on an electronic device, causes the electronic device to execute the method described in the first aspect and any possible implementation of the first aspect.

[0030] In a fifth aspect, the present application provides a computer program product comprising instructions, which, when executed on an electronic device, enables the electronic device to execute the method described in the first aspect and any possible implementation of the first aspect.

[0031] It can be understood that the electronic device provided in the second aspect, the chip system provided in the third aspect, the computer storage medium provided in the fourth aspect, and the computer program product provided in the fifth aspect are all used to execute the method provided in the present application. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a flow chart of a color calibration method provided by an embodiment of the present application;

[0033] Figure 2 is a flow chart of another color calibration method provided by an embodiment of the present application;

[0034] Figure 3 is a schematic diagram of the Lab color space provided in an embodiment of the present application;

[0035] Figure 4 It is the spectrum diagram of OLED provided in the embodiment of the present application and the spectrum diagram of multi-channel LED light box simulating D light source;

[0036] Figure 5 is a flow chart of a production line color calibration method provided by an embodiment of the present application;

[0037] Figure 6 is a flow chart of another production line color calibration method provided by an embodiment of the present application;

[0038] Figure 7 is a schematic diagram of the structure of an electronic device 102 provided in an embodiment of the present application;

[0039] Figure 8 It is a schematic diagram of the structure of an electronic device 200 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0041] Terminal electronic devices such as mobile phones and tablet computers are denoted as electronic devices 100. The electronic devices 100 are usually equipped with a display screen (also called a screen) for display.

[0042] The display screen includes a display panel. The display panel can be made of different materials such as cathode ray tube (CRT), liquid crystal display (LCD), organic light-emitting diode (OLED), active-matrix organic light emitting diode (AMOLED), flexible light-emitting diode (FLED), quantum dot light emitting diodes (QLED), etc.

[0043] White light can be obtained by mixing red light, green light and blue light in a certain proportion. In the color coordinate system, the coordinates corresponding to the above proportions are also called white point coordinates. For example, the white point coordinates of daylight color F6500 are C1(0.313, 0.337, 0.35). The sum of the proportion terms of the white point coordinates is 1. Therefore, the white point coordinates C1(0.313, 0.337, 0.35) of F6500 can also be simply expressed as C1(0.313, 0.337).

[0044] Due to different materials and structures, different screens using the same white point coordinates will emit different white light, for example, some are yellowish (warm white), some are bluish (cold white), etc. Therefore, before the electronic device 100 is sold, especially after the electronic device 100 uses a display screen made of new materials, the manufacturer usually performs color calibration on the electronic device 100 to ensure that the screens of the electronic devices 100 sold successively emit light in a consistent manner, to ensure the user's perception, and thus to ensure the user's experience.

[0045] The electronic device 100 is not limited to mobile phones and tablet computers. It can also be a desktop computer, a laptop computer, a wearable device, a vehicle-mounted device, a smart home device, or other electronic devices that include a display screen. The embodiment of the present application does not impose any special restrictions on the specific type of the electronic device 100.

[0046] Figure 1 It is a flow chart of a color calibration method provided in an embodiment of the present application.

[0047] like Figure 1 As shown, the electronic device 100 includes an electronic device 101 and an electronic device 102. The electronic device 101 may use an LCD screen (the screen of the electronic device 101 may be recorded as screen A); the electronic device 102 may use an AMOLED screen (the screen of the electronic device 102 may be recorded as screen B).

[0048] The electronic device 101 can be used as a reference device. Therefore, the electronic device 102 can be used as a device to be calibrated. Preferably, the electronic device 101 is a publicly sold device of the same type as the electronic device 102. For example, when the electronic device 102 is a tablet computer, the electronic device 101 is a publicly sold tablet computer. Of course, the electronic device 101 can also be a device of a different type from the electronic device 102, or a device dedicated to color calibration that is not publicly sold, etc. The present application does not limit the selection of the electronic device 101.

[0049] The light emitted by the screen A of the electronic device 101 with the white point coordinate C0 (first value) is recorded as white light L0, also known as standard light. The white point coordinate C0 includes but is not limited to: the white point coordinate C1 (0.313, 0.337) of the daylight color F6500, the white point coordinate C2 (0.346, 0.359) of the neutral white color F5000, the white point coordinate C3 (0.380, 0.380) of the cool white color F4000, the white point coordinate C4 (0.409, 0.394) of the white color F3500, the white point coordinate C5 (0.440, 0.403) of the warm white color F3000, and the white point coordinate C6 (0.463, 0.420) of the incandescent color F2700.

[0050] The light emitted by the screen B (the first screen to be calibrated) of the electronic device 102 at the white point coordinate C0 (the first value) is recorded as white light L1 (the first light). Due to differences in materials, structures, etc., the white light L1 is different from the standard light. For example, compared with the standard light, the white light L1 of the AMOLED screen B is yellowish.

[0051] The electronic device 200 (also called the color calibration device) can obtain the standard light emitted by the screen A, determine the coordinates of the standard light in the Lab color space, and record it as Lab0 (the second Lab value). On the other hand, the electronic device 200 can obtain the white light L1 emitted by the screen B, determine the coordinates of the white light L1 in the Lab color space, and record it as Lab1 (the first Lab value), and determine the mapping relationship MAP1 (the first mapping relationship) from the Lab color space to the color coordinate system of the electronic device 102 based on the above Lab1 and the white point coordinate C0.

[0052] Then, based on MAP1 , the electronic device 200 may determine another white point coordinate C0 ′ (a second value) corresponding to Lab0 in the color coordinate system of the electronic device 102 .

[0053] After the white point coordinates of the electronic device 102 are updated from C0 to C0', the coordinates of the white light L2 (second light) emitted by the screen B of the electronic device 102 in the Lab color space, i.e., Lab0, are consistent with the standard light. At this time, the electronic device 200 can determine that the light emitted by the screen A is consistent with that emitted by the screen B. The electronic device 102 completes the color calibration.

[0054] However, due to the metamerism failure problem, the electronic device 200 determining that screen A and screen B emit the same light does not mean that screen A and screen B also emit the same light in human vision, that is, the white light L2 observed by the human eye is inconsistent with the standard light.

[0055] At this time, after the white point coordinates of the electronic device 102 are updated from C0 to C0' and the screen B of the electronic device 102 emits white light L2, the electronic device 200 also needs to obtain human eye observation feedback. When the human eye observation feedback indicates that the white light L2 observed by the human eye is inconsistent with the standard light, the electronic device 200 continues to adjust the white point coordinates so that the white light emitted by the screen B of the electronic device 102 is consistent with the standard light in the human eye's vision.

[0056] Figure 2 This is a flow chart of another color calibration method provided in an embodiment of the present application.

[0057] S101. Obtaining human eye observation feedback.

[0058] After the white point coordinates of the electronic device 102 are updated from C0 to C0' and the screen B of the electronic device 102 emits white light L2, the electronic device 200 may display multiple options shown in Table 1:

[0059] Table 1

[0060]

[0061]

[0062] The electronic device 200 may receive user operations for one or more of the above options. The meanings corresponding to the above one or more options are human eye observation feedback. Among them, in a human eye observation feedback, Item-1 and Item-2 do not exist at the same time, Item-3 and Item-4 do not exist at the same time, Item-5 and Item-6 do not exist at the same time, and Item-7 does not exist at the same time as other options (one or more of Item-1 to Item-6).

[0063] S102: Determine new Lab coordinates based on human eye observation feedback.

[0064] Figure 3 : is a schematic diagram of the Lab color space provided in the embodiment of the present application. The Lab color space is a color space based on human eye perception. This color space takes into account the sensitivity of the human eye to light of different wavelengths, as well as the human eye's perception of brightness, chroma, and saturation, and can better describe the colors perceived by the human eye.

[0065] like Figure 3 As shown, the Lab color space includes an L axis, an a axis, and a b axis. The positive direction of the L axis indicates an increase in brightness, and the negative direction of the L axis indicates a decrease in brightness. The positive direction of the a axis indicates an increase in red, and the negative direction of the a axis indicates an increase in green. The positive direction of the b axis indicates an increase in yellow, and the negative direction of the b axis indicates an increase in blue. A coordinate in the Lab color space uniquely corresponds to a color. The coordinates in the Lab color space are also called Lab coordinates. Therefore, one Lab coordinate corresponds to one color. In the Lab color space, different Lab coordinates correspond to different colors.

[0066] After obtaining the human eye observation feedback, the electronic device 200 may determine a new Lab coordinate based on the feedback.

[0067] The electronic device 200 can reduce or increase the value of the relevant coordinate axis (the Lab coordinate axis that needs to be adjusted indicated by the human eye observation feedback: one or more of the L / a / b axes) according to the human eye observation feedback. Exemplarily, when the human eye observation feedback includes Item-1, the electronic device 200 can reduce the value of the L axis; when the human eye observation feedback includes Item-2, the electronic device 200 can increase the value of the L axis; when the human eye observation feedback includes Item-3, the electronic device 200 can reduce the value of the a axis; when the human eye observation feedback includes Item-4, the electronic device 200 can increase the value of the a axis; when the human eye observation feedback includes Item-5, the electronic device 200 can reduce the value of the b axis; when the human eye observation feedback includes Item-6, the electronic device 200 can increase the value of the b axis.

[0068] Exemplarily, after the white point coordinates of the electronic device 102 are updated from C0 to C0' and the screen B of the electronic device 102 emits white light L2, the electronic device 200 may receive user operations for Item-1 and Item-5. At this time, the electronic device 200 may determine to lower the values ​​of the L axis and the b axis according to Item-1 and Item-5. Taking the coordinates Lab0 (L0, a0, b0) of the white light L2 in the Lab color space as an example, the electronic device 200 may adjust L0 down to L2 (L2 < L0) and b0 down to b2 (b2 < b0), thereby obtaining new Lab coordinates Lab2 (L2, a0, b2).

[0069] The amount by which the coordinate axis value is reduced or increased is recorded as the adjustment amount. The adjustment amount of the L axis is recorded as △L, the adjustment amount of the a axis is recorded as △a, and the adjustment amount of the b axis is recorded as △b.

[0070] In a specific implementation, the adjustment amount of the relevant coordinate axis is fixed to the unit length N0 of the coordinate axis. Taking N0=1 as an example, L2=L0-1, b2=b0-1, that is, |△L|=N0=1, |△b|=N0=1. It can be understood that if the human eye observation feedback also includes Item-3 or Item-4, the electronic device 200 can reduce or increase a0 to a2 to obtain a new Lab coordinate Lab2 (L2, a2, b2). Also taking N0=1 as an example, a2=a0±1, that is, |△a|=N0=1.

[0071] Optionally, the electronic device 200 may also adjust multiple unit lengths at one time. Taking n unit lengths N0 as an example, in this case, |△L|=n*N0, |△b|=n*N0 and / or |△a|=n*N0, n≥2. The embodiment of the present application does not limit the specific adjustment amount.

[0072] S103, determining new white point coordinates according to the new Lab coordinates.

[0073] According to the mapping relationship MAP1 from the Lab color space to the color coordinate system of the electronic device 102, the electronic device 200 can determine new Lab coordinates, such as Lab2 (L2, a0, b2) (third Lab value), and the corresponding new white point coordinates C0" (third value).

[0074] S104, updating the white point coordinates of the electronic device 102 from C0' to C0". The electronic device 102 emits white light L3 at C0".

[0075] After receiving the new white point coordinate C0", the electronic device 102 can determine the RGB channel grayscale values ​​R, G, B corresponding to the white point coordinate C0", and then set the RGB channel grayscale values ​​of screen B to the above R, G, B, so that screen B emits white light L3 (third light) at C0".

[0076] Optionally, the electronic device 200 may also directly determine the white point coordinate change △C0 (△x, △y, △z) corresponding to △L1, △a1 and / or △b1, and then determine the corresponding RGB channel grayscale value differences △R, △G, △B based on △C0. C0'+△C0=C0". Therefore, the electronic device 102 may update the RGB channel grayscale values ​​of screen B based on the above △R, △G, △B and the RGB channel grayscale values ​​of the current screen B, for example, updating the RGB channel grayscale values ​​(R0, G0, B0) of the current screen B to (R0+△R, G0+△G, B0+△B), so that screen B emits white light L3 with C0".

[0077]

[0078] Formula (1) is a conversion formula from XYZ color space to RGB color space under the CIE standard provided in an embodiment of the present application. Referring to formula (1), the electronic device 102 or the electronic device 200 can determine the RGB channel grayscale values ​​R, G, B according to the new white point coordinate C0" (XYZ color space), or determine the RGB channel grayscale value differences △R, △G, △B according to the white point coordinate change △C0.

[0079] S105. The white light L3 is consistent with the standard light in human vision.

[0080] After updating the white point coordinates of the electronic device 102 from C0' to C0", the electronic device 200 can display the options shown in Table 1 again. After the electronic device 102 emits white light L3 with C0", the inspector can observe again whether the light emitted by the screen B of the electronic device 102 (ie, white light L3) after adjustment is consistent with the standard light.

[0081] If they are consistent, the inspector can select Item-7. At this time, based on the human eye observation feedback Item-7, the electronic device 200 can determine that the screen B of the electronic device 102 has completed the color calibration.

[0082] On the contrary, if there is inconsistency, the electronic device 200 can continue to determine the new adjustment amount of the relevant coordinate axis according to the new human eye observation feedback, such as new △L, △a, △b, and then determine the new Lab coordinates and new white point coordinates according to the above new adjustment amounts, and control the screen B of the electronic device 102 to emit light with the above latest white point coordinates until the screen B of the electronic device 102 emits white light that is consistent with the standard light in human eye vision.

[0083] In a scenario where the light emission of screen B is adjusted to be consistent with the standard light through a human eye observation feedback, this human eye observation feedback can be called the first input of the user. The adjustment amount of the relevant coordinate axis corresponding to the first input is one or more of △L, △a, and △b, that is, one or more of △L1, △a1, and △b1.

[0084] In a scenario where the light emission of screen B is adjusted to be consistent with the standard light through at least two human eye observation feedbacks, the last human eye observation feedback can be called the user's first input, and the previous human eye observation feedback can be called the user's second input. At this time, the first input corresponds to one or more of △L, △a, △b, that is, one or more of △L1, △a1, △b1. The second input corresponds to one or more of △L, △a, △b, that is, one or more of △L2, △a2, △b2. On the basis of lab0, the Lab coordinates determined according to one or more of △L2, △a2, △b2 can be called the fourth Lab value, and the white point coordinates corresponding to the fourth Lab value determined according to MAP1 are the fourth value. The white light L4 emitted by screen B of the electronic device 102 with the fourth value, which is still inconsistent with the standard light, is the fourth light. At this time, based on the above inconsistency, the electronic device 200 continues to obtain the first input.

[0085] In S102, based on a human eye observation feedback, the electronic device 200 fixedly adjusts one or more units. Figure 2 The color calibration method shown is also called fixed calibration.

[0086] In some embodiments, the electronic device 200 may also change the adjustment amount of the relevant coordinate axis in two consecutive human eye observation feedbacks.

[0087] For example, when obtaining the human eye observation feedback for the first time, the electronic device 200 may increase or decrease the value of the relevant coordinate axis by N1 units; when obtaining the human eye observation feedback at an interval of Y times, the electronic device 200 may increase or decrease the value of the relevant coordinate axis by N2 units, N1>N2, Y≥0. For example, when obtaining the human eye observation feedback for the first time, the electronic device 200 may increase or decrease the value of the relevant coordinate axis by 3 units; when obtaining the human eye observation feedback at an interval of 1 time (i.e., the third time), the electronic device 200 may increase or decrease the value of the relevant coordinate axis by 2 units. By analogy, the electronic device 200 can continuously reduce the adjustment amount of the relevant coordinate axis corresponding to a human eye observation feedback, thereby helping the electronic device 200 to quickly determine the target lab coordinates and avoid missing the target lab coordinates.

[0088] The white light emitted by the electronic device 102 with the target white point coordinates is consistent with the standard light in human vision. The lab coordinates corresponding to the target white point coordinates are the target lab coordinates. For example, assume that the white light L3 is consistent with the standard light in human vision. At this time, the white point coordinates C0" are the target white point coordinates, and Lab2 (L2, a0, b2) are the target lab coordinates.

[0089] Preferably, N1=3, Y=0, N2=N1-1 and N2≥1. Alternatively, N1=3, Y=1, N2=N1-1 and N2≥1.

[0090] In some embodiments, when the electronic device 200 displays the options shown in Table 1, it can also display a receiving control after each option to receive the adjustment amount input by the user, also known as the specified adjustment amount. The electronic device 200 can adjust the value of the relevant coordinate axis according to the above-mentioned specified adjustment amount setting, thereby determining the new lab coordinate.

[0091] Taking the user operation for Item-1 and Item-5 as an example in S102, the electronic device 200 can also receive the specified adjustment amount △data1 corresponding to Item-1 and the specified adjustment amount △data2 corresponding to Item-5 input by the user. Therefore, in the new Lab coordinate Lab2 (L2, a0, b2), L2 = L0-△data1, b2 = b0-△data2, that is, |△L1| = △data1, |△b1| = △data2. The inspection personnel can input the specified adjustment amount to the electronic device 200 through the keyboard or joystick.

[0092] In some embodiments, the electronic device 101 may also be replaced with a standard D light source light box, such as a standard D65 light box, a standard D50 light box, a standard D75 light box, etc. In this case, the D light source light box may provide a D light source as a standard light. The electronic device 200 may adjust the white light emitted by the screen B of the electronic device 102 to be consistent with the D light source (consistent with human vision) through the above-mentioned color calibration method.

[0093] In this way, inspectors do not need to select a device from publicly sold devices as a reference device, which can ensure that the standard light is not affected by the screen material and structure of the publicly sold device, and avoid screen aging of the publicly sold device causing standard light abnormalities, which directly leads to color calibration failure of the device to be calibrated.

[0094] Optionally, in some embodiments, the inspector can adjust the wavelength ratio of the multi-channel LED light box so that the light emitted by the multi-channel LED light box is consistent with the D light source. Here, the light emitted by the multi-channel LED light box is consistent with the D light source means that the chromaticity difference DE00 between the light emitted by the multi-channel LED light box and the D light source is less than 1, and the color rendering index of the light emitted by the multi-channel LED light box and the D light source is greater than 90.

[0095] At this time, the inspectors can use the above-mentioned multi-channel LED light box to simulate the standard D light source light box as a reference device to provide standard light, thereby reducing costs.

[0096] Figure 4 It is the OLED spectrum diagram provided in the embodiment of the present application and the spectrum diagram of the multi-channel LED light box simulating D light source.

[0097] like Figure 4 As shown, compared with the electronic device 101 using an OLED screen, the multi-channel LED light box can emit light that is closer to sunlight, so that the calibrated electronic device 102 using the above color calibration method also emits light that is closer to sunlight, providing a better visual experience for the user.

[0098] The multi-channel LED light box that is consistent with the D light source will also age with long-term use, causing the light emitted to be inconsistent with the D light source. At this time, the inspection personnel can adjust the wavelength ratio of the multi-channel LED light box again to make the light emitted by the multi-channel LED light box consistent with the D light source again and continue to provide standard light in color calibration.

[0099] The inspectors can regularly inspect the multi-channel LED light box to determine whether the chromaticity difference DE00 between the light emitted by the multi-channel LED light box and the chromaticity of the D light source is less than 1, and whether the color rendering index is greater than 90. When the light emitted by the multi-channel LED light box does not meet the above conditions, the inspectors can adjust the wavelength ratio of the multi-channel LED light box again.

[0100] Figure 5 It is a flow chart of a production line color calibration method provided in an embodiment of the present application.

[0101] like Figure 5 As shown, before implementing the above color calibration method, the electronic device 200 can (S201) record the screen spectrum characteristics of the device to be calibrated. Figure 2 After the color calibration method shown is completed, the electronic device 200 can (S202) record the target white point coordinates of the device and associate the target white point coordinates with the spectral characteristics.

[0102] When calibrating the screen of the next device to be calibrated (the second screen to be calibrated), the electronic device 200 may (S203) first obtain the screen spectral characteristics of the device to be calibrated, and (S204) determine whether there is a device among the calibrated devices that matches the spectral characteristics of the device to be calibrated.

[0103] If yes, the electronic device 200 may query the target white point coordinates of the matched calibrated device. Then, the electronic device 200 may (S205) directly set the white point coordinates of the device to be calibrated to the target white point coordinates corresponding to the calibrated device. Based on the same spectral characteristics as the calibrated device, after setting the white point coordinates of the device to be calibrated to the target white point coordinates corresponding to the calibrated device, the device to be calibrated can also emit light that is consistent with the standard light in human vision, that is, emit standard light.

[0104] On the contrary, if there is no device in the calibrated devices that matches the spectral characteristics of the device to be calibrated, the electronic device 200 may (S206) execute Figure 2 The color calibration method shown calibrates the device to be calibrated, determines the target white point coordinates of the device to be calibrated, and then makes the device to be calibrated emit standard light.

[0105] For example, assuming Figure 2 The spectral feature of the electronic device 102 is feature1. Figure 2 After the color calibration method shown, the electronic device 200 determines that the target white point coordinates of the electronic device 102 are C0". Therefore, the electronic device 200 can record feature1 corresponding to C0". After the electronic device 102, there is another electronic device 103 to be calibrated. The electronic device 200 can first obtain the spectral characteristics of the electronic device 103, and determine that the spectral characteristics of the electronic device 103 are feature1. Then, the electronic device 200 can query the target white point coordinates corresponding to feature1, and determine the target white point coordinates C0". Therefore, the electronic device 200 can set the white point coordinates of the electronic device 103 to C0". Based on the same spectral characteristics as the electronic device 102, after setting the white point coordinates of the electronic device 103 to C0", the electronic device 103 can also emit standard light.

[0106] In this way, the inspectors do not need to implement Figure 2 The calibration method shown is beneficial to saving inspection costs and improving calibration efficiency.

[0107] Figure 6 This is a flow chart of another production line color calibration method provided in an embodiment of the present application.

[0108] like Figure 6 As shown, before implementing the color calibration method, the electronic device 200 can (S301) record the screen information of the device to be calibrated. The screen information includes at least one of the following: material type, supplier, production batch, etc. Figure 2After the color calibration method shown completes the calibration, the electronic device 200 may ( S302 ) record the target white point coordinates of the device and associate the target white point coordinates with the screen information.

[0109] When calibrating the screen of the next device to be calibrated (the second screen to be calibrated), the electronic device 200 may (S303) first obtain the screen information of the device to be calibrated, and (S304) determine whether there is a device among the calibrated devices that matches the screen information of the device to be calibrated.

[0110] If yes, the electronic device 200 may query the target white point coordinates of the matched calibrated device. Then, the electronic device 200 may (S305) directly set the white point coordinates of the device to be calibrated to the target white point coordinates corresponding to the calibrated device. Based on the same screen information as the calibrated device, after setting the white point coordinates of the device to be calibrated to the target white point coordinates corresponding to the calibrated device, the device to be calibrated can also emit light that is consistent with the standard light in human vision, that is, emit standard light.

[0111] On the contrary, if there is no device among the calibrated devices that matches the screen information of the device to be calibrated, the electronic device 200 may (S306) execute Figure 2 The color calibration method shown calibrates the device to be calibrated, determines the target white point coordinates of the device to be calibrated, and then makes the device to be calibrated emit standard light.

[0112] For example, assuming Figure 2 The screen information of the electronic device 102 is shown as STR1 (OLED, Q1, D20240116). OLED is a material type, Q1 is a supplier, and D20240116 is a production batch number. Figure 2 After the color calibration method shown, the electronic device 200 determines that the target white point coordinates of the electronic device 102 are C0". Therefore, the electronic device 200 can record STR1 corresponding to C0". After the electronic device 102, there is another electronic device 104 to be calibrated. The electronic device 200 can first obtain the screen information STR2 (OLED, Q1, D20240116) of the electronic device 104. Then, the electronic device 200 can query that the screen information of the electronic device 102 is that STR1 matches STR2. Therefore, the electronic device 200 can obtain the target punctuation point coordinates of the electronic device 102, such as C0", and set the white point coordinates of the electronic device 104 to C0". Based on the same screen information as the electronic device 102, after setting the white point coordinates of the electronic device 104 to C0", the electronic device 104 can also emit standard light.

[0113] Compared with the spectral characteristics of the device to be calibrated, the screen information of the device to be calibrated is easier to obtain. Figure 6 The color calibration method shown in the figure applied to the production line can further save the inspection cost and improve the calibration efficiency.

[0114] Figure 7 It is a schematic diagram of the structure of the electronic device 102 provided in an embodiment of the present application.

[0115] like Figure 7 As shown, the electronic device 102 includes components such as a processor 411, a memory 412, a power switch 414, and a display screen 415. Components in the electronic device are connected to each other via a bus and communicate based on the bus.

[0116] The processor 411 may include one or more processing units, for example, the processor 411 may include a central processing unit (CPU), an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor and / or a neural-network processing unit (NPU), etc. Among them, different processing units may be independent devices or integrated into one or more processors. The controller may generate an operation control signal according to the instruction opcode and the timing signal to complete the control of fetching and executing instructions.

[0117] The memory 412 is coupled to the processor 411 and is used to store various software programs and / or multiple sets of instructions. The memory 412 can be used to store computer executable program codes, which include instructions. The processor 411 implements various functions by running the instructions stored in the memory 412.

[0118] The display screen 415 is used for display. The color calibration method described in the present application is a color calibration method for the light emission of the display screen 415. The electronic device can control the display screen 415 to emit light through the processor 411, and then control the display screen 415 to display different image contents.

[0119] The power switch 414 can be used to control the power supply to the electronic device, thereby providing power to the processor 411, the memory 412, the display screen 415, etc.

[0120] like Figure 7As shown, the electronic device 102 may also include a wireless communication module 413, an audio module 416, a speaker 417, a microphone 418, a camera 419, sensors and other components, which are not listed here one by one. Figure 7 The illustrated structure should not constitute a specific limitation on the electronic device 102 .

[0121] The wireless communication module 413 can provide wireless communication solutions including 4G, WLAN, Bluetooth communication, etc. The audio module 416 can be used to convert digital audio signals into analog audio signal outputs, and can also be used to convert analog audio inputs into digital audio signals. The speaker 417 can be used to convert the audio signal sent by the audio module 416 into a sound signal. The electronic device 102 can implement an audio playback function through the audio module 416, the speaker 417, etc. The microphone 418, also known as a "microphone" or "microphone", can be used to convert a sound signal into an electrical signal. The electronic device 102 can collect sound signals through the audio module 416 and the microphone 418. The camera 419 can be used to capture still images or videos.

[0122] Figure 8 It is a schematic diagram of the structure of an electronic device 200 provided in an embodiment of the present application.

[0123] like Figure 8 As shown, the electronic device 200 may include a processor 311, a memory 312, an interface module 313, a power switch 314, an input module 315, a display screen 316, a Lab color detection module 317 and other components. The components in the color calibration device are connected through a bus and communicate based on the bus.

[0124] The processor 311 may include one or more processing units, such as a CPU, an AP, a GPU, an ISP, a DSP, a controller, etc.

[0125] The memory 312 is coupled to the processor 311 and is used to store various software programs and / or multiple sets of instructions. The memory 312 can be used to store computer executable program codes, which include instructions.

[0126] Among them, the memory 312 may include one or more random access memories (RAM) and one or more non-volatile memories (NVM). The random access memory can be directly read and written by the processor 311. The random access memory can be used to store executable programs (such as machine instructions) of the operating system or other running programs, and can also be used to store user and application data. The non-volatile memory can also store executable programs and store user and application data. The executable program stored in the non-volatile memory, that is, the user data, can be loaded into the random access memory in advance for direct reading and writing by the processor 311.

[0127] The executable program code and data for implementing the color calibration method provided in the embodiment of the present application can be stored in a non-volatile memory. In the process of implementing the above color calibration method, the electronic device 200 can load the executable program code and data in the non-volatile memory into the random access memory, and then execute it in the processor 311, providing a function of calibrating the color of the screen light of the device to be checked. In this way, the screen after verification can emit standard light to ensure the user's visual experience.

[0128] The interface module 313 can provide a physical interface between the electronic device 200 and the electronic device 102. In the embodiment of the present application, the electronic device 200 can send the white point coordinates or the white point coordinate change to the electronic device 102 through the interface module 313. The interface provided by the interface module 313 includes but is not limited to USB, RS-232, and HDMI.

[0129] The Lab color detection module 317 may be used to determine the color value of light (light source / reflected light) in the Lab color space, ie, the Lab coordinates of the light.

[0130] In some electronic devices 200, the electronic device 200 may also be connected to a colorimeter through the interface module 313. The colorimeter is used to determine the Lab coordinates of light. The electronic device 200 may also obtain the Lab coordinates of light from the colorimeter through the interface module 313. In this case, the electronic device 200 does not need to be configured with the Lab color detection module 317.

[0131] The display screen 316 can be used for display. The display screen 316 includes a display panel. The electronic device 200 can implement display functions through the processor 311 and the display screen 316, such as displaying the options shown in Table 1 and receiving controls.

[0132] The input module 315 can be used to receive input from the inspector, such as user operations on one or more options in the options shown in Table 1, editing operations on the receiving controls, and then determining human eye observation feedback, specifying adjustment amounts, etc.

[0133] The power switch 314 can be used to control the power supply to the electronic device, thereby supplying power to the processor 311, the memory 312, the interface module 313, the input module 315, the display screen 316, the Lab color detection module 317, etc.

[0134] The electronic device 200 may also include a wireless communication module, a camera, a sensor and other components, which are not listed here one by one. Figure 8 The illustrated structure should not constitute a specific limitation on the electronic device 200 .

[0135] As used in the specification and appended claims of the present application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include plural expressions, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in the present application refers to and includes any or all possible combinations of one or more of the listed items. As used in the above embodiments, the term "when..." may be interpreted to mean "if..." or "after..." or "in response to determining..." or "in response to detecting...", depending on the context. Similarly, the phrase "when determining..." or "if (stated condition or event) is detected" may be interpreted to mean "if determining..." or "in response to determining..." or "when (stated condition or event) is detected" or "in response to detecting (stated condition or event)", depending on the context.

[0136] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media integration. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk), etc.

[0137] Those skilled in the art can understand that to implement all or part of the processes in the above-mentioned embodiments, the processes can be completed by computer programs to instruct related hardware, and the programs can be stored in computer-readable storage media. When the programs are executed, they can include the processes of the above-mentioned method embodiments. The aforementioned storage media include: ROM or random access memory RAM, magnetic disk or optical disk and other media that can store program codes.

Claims

1. A color calibration method, applied to electronic equipment, characterized in that: The method comprises: Determine a second Lab value in the Lab color space corresponding to the standard light; Setting the white point coordinates of the first screen to be calibrated to a second value, wherein the second light emitted by the first screen to be calibrated at the second value corresponds to the second Lab value in the Lab color space; When the second light is visually inconsistent with the standard light, obtaining a first input from a user; A third value is determined according to the first input, and the white point coordinates of the first screen to be calibrated are set to the third value, so that the third light emitted by the first screen to be calibrated with the third value is consistent with the standard light in human eye vision.

2. The method according to claim 1, characterized in that The method further comprises: Setting the white point coordinates of the first screen to be calibrated to a first value, wherein the first light emitted by the first screen to be calibrated at the first value corresponds to a first Lab value in a Lab color space; Determine a first mapping relationship according to the first value and the first lab value; The second value is obtained according to the second Lab value and the first mapping relationship.

3. The method according to claim 2, characterized in that The determining a third value according to the first input comprises: determining a third Lab value in the Lab color space according to the first input; The third value is determined according to the third Lab value and the first mapping relationship.

4. The method according to claim 3, characterized in that: The determining a third Lab value in the Lab color space according to the first input includes: Determine at least one of the following based on the first input: △L1, △a1, △b1; Determine the third Lab value according to the at least one item: △L1, △a1, △b1; The ΔL1 indicates the difference in brightness between the second light and the standard light, the Δa1 indicates the difference in red and green between the second light and the standard light, and the Δb1 indicates the difference in yellow and blue between the second light and the standard light.

5. The method according to claim 4, characterized in that Before obtaining the first input from the user, the method further includes: Get the second input from the user; Determine at least one of the following based on the second input: ΔL2, Δa2, Δb2; Determine a fourth Lab value according to the at least one item: △L2, △a2, △b2; Setting the white point coordinates of the first screen to be calibrated to a fourth value, wherein the first screen to be calibrated emits a fourth light at the fourth value, and the fourth value is obtained according to the fourth Lab value and the first mapping relationship; The obtaining of the first input from the user comprises: When the fourth light and the standard light are visually inconsistent with each other, a first input of the user is obtained.

6. The method according to claim 5, characterized in that The |△L1|=N0, |△a1|=N0, |△b1|=N0; the |△L2|=N0, |△a2|=N0, |△b2|=N0.

7. The method according to claim 6, characterized in that The N0 is the unit length of the coordinate axis in the Lab color space.

8. The method according to claim 5, characterized in that The |△L1|=N1, |△a1|=N1, |△b1|=N1; the |△L2|=N2, |△a2|=N2, |△b2|=N2; N1>N2.

9. The method according to claim 1, characterized in that: The standard light is obtained by emitting light from the screen of a device that is already publicly available.

10. The method according to claim 1, characterized in that The standard light is obtained by emitting light from a D65 light box.

11. The method according to any one of claims 1 to 10, characterized in that: The method further comprises: The white point coordinates of the second screen to be calibrated are set to the third value. The second screen to be calibrated is made of the same material as the first screen to be calibrated. The light emitted by the second screen to be calibrated at the third value is consistent with the standard light in human vision.

12. The method according to claim 11, characterized in that The second screen to be calibrated is manufactured by the same manufacturer as the first screen to be calibrated.

13. The method according to claim 12, characterized in that The second screen to be calibrated is produced in the same batch as the first screen to be calibrated.

14. The method according to any one of claims 1 to 10, characterized in that: The method further comprises: The white point coordinates of the second screen to be calibrated are set to the third value, the second screen to be calibrated has the same spectral characteristics as the first screen to be calibrated, and the light emitted by the second screen to be calibrated at the third value is consistent with the standard light in human eye vision.

15. An electronic device, characterized in that: It comprises one or more processors and one or more memories; wherein, the one or more memories are coupled to the one or more processors, and the one or more memories are used to store computer programs, and when the one or more processors execute the computer programs, the electronic device executes the method as described in any one of claims 1-14.

16. A chip system, the chip system is applied to electronic equipment, the chip system comprises one or more processors, characterized in that: The processor is used to call computer instructions so that the electronic device executes the method according to any one of claims 1-14.

17. A computer-readable storage medium comprising a computer program, characterized in that: When the computer program is executed on an electronic device, the electronic device is enabled to execute the method according to any one of claims 1 to 14.

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