Color temperature adjusting method and related device
By determining the display brightness and viewing distance in electronic devices and adjusting the screen color temperature to reduce the blue light energy, the problem of insufficient viewing comfort and eye protection function of the device display screen is solved, and higher comfort and eye protection effect are achieved.
Patent Information
- Application Number
- CN202310773132.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-27
- Publication Date
- 2024-12-27
AI Technical Summary
The comfort and eye protection function of existing electronic devices such as computers, TVs, mobile phones, tablets, projectors, etc. are insufficient, resulting in worsening eye fatigue in humans.
By determining the screen display brightness and viewing distance, the target color temperature of the screen is adaptively adjusted to reduce the blue light energy received by the user, and improve the comfort of the screen display and eye protection effect.
It effectively reduces the blue light energy received by the user, improves the comfort of the screen display and eye protection effect, and reduces eye fatigue in humans.
Smart Images
Figure CN119207254A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of display technology, and in particular to a color temperature adjustment method and related devices. Background Art
[0002] In recent years, with the increasing use of electronic devices such as computers, televisions, mobile phones, tablets, and projectors, the time people spend watching images on device displays has become longer and longer, causing increased eye fatigue. Therefore, improving viewing comfort and eye protection of display images plays a very important role in consumer electronic devices, especially in educational devices, which has become the function that consumers pay most attention to.
[0003] However, the viewing comfort and / or eye protection function of the display screens of existing electronic devices such as computers, televisions, mobile phones, tablets, and projectors still have certain shortcomings. Summary of the invention
[0004] The present application provides a color temperature adjustment method and related devices, which can improve the viewing comfort and / or eye protection effect of the display screen of the device.
[0005] To achieve the above object, the present application provides a color temperature adjustment method, the method comprising:
[0006] Determine the screen display brightness and viewing distance, wherein the viewing distance is the distance between the user and the screen;
[0007] Determining a target color temperature based on the picture display brightness and the viewing distance;
[0008] The color temperature of the picture is adjusted to the target color temperature.
[0009] The present application first determines the screen display brightness and viewing distance, then determines the target color temperature of the screen based on the screen display brightness and viewing distance, and then adjusts the screen color temperature to the target color temperature determined based on the screen display brightness and viewing distance. In this way, the screen color temperature can be adaptively adjusted based on the screen display brightness and viewing distance to improve the screen display comfort and / or eye protection effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0011] Figure 1 It is a flow chart of an implementation method of the color temperature adjustment method of the present application;
[0012] Figure 2 This is a schematic diagram of the relationship between the first adjustment ratio and the screen display brightness in the color temperature adjustment method of the present application;
[0013] Figure 3 This is a schematic diagram of the relationship between the second adjustment ratio and the viewing distance in the color temperature adjustment method of the present application;
[0014] Figure 4 is a schematic diagram of a Cruysov curve in the color temperature adjustment method of the present application;
[0015] Figure 5 It is a structural schematic diagram of an embodiment of the color temperature adjustment device of the present application;
[0016] Figure 6 This is an interactive schematic diagram of an implementation of a color temperature adjustment device of the present application;
[0017] Figure 7 is an interactive schematic diagram of another embodiment of the color temperature adjustment device of the present application;
[0018] Figure 8 It is a structural schematic diagram of an embodiment of the electronic device of the present application;
[0019] Fig. 9 It is a structural schematic diagram of an implementation method of a computer-readable storage medium of the present application. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present application. In addition, unless otherwise specified (for example, "or in addition" or "or in an alternative"), the term "or" as used herein refers to a non-exclusive "or" (that is, "and / or"). Moreover, the various embodiments described herein are not necessarily mutually exclusive, because some embodiments can be combined with one or more other embodiments to form new embodiments.
[0021] This application proposes a color temperature adjustment method. Figure 1 As shown, the color temperature adjustment method of the present application includes the following steps. Optionally, the color temperature adjustment method of the present application can be used for a display device. The display device can be a mobile phone, a computer, a projector, or other device that has the function of presenting a display image. It should be noted that the following step numbers are only used to simplify the description and are not intended to limit the execution order of the steps. The steps of this embodiment can be arbitrarily changed in execution order without violating the technical idea of the present application.
[0022] S101: Determine the image display brightness and viewing distance.
[0023] The picture display brightness and viewing distance can be determined first, so that the target color temperature of the picture can be determined based on the picture display brightness and viewing distance. Then, the picture color temperature can be adjusted to the target color temperature determined based on the picture display brightness and viewing distance. In this way, the picture color temperature can be adaptively adjusted based on the picture display brightness and viewing distance, so as to improve the picture display comfort and eye protection effect.
[0024] Optionally, for a device that displays images on a display screen, the brightness of the display screen may be used as the image display brightness. For example, if the display screen of the device is a liquid crystal screen, the backlight brightness may be used as the image display brightness.
[0025] In another achievable manner, the device to which the color temperature adjustment method of the present application is applied may be a projection device, and the screen display brightness may be determined based on the projection brightness of the projection device. Exemplarily, the projection brightness of the projection device may be used as the screen display brightness. Alternatively, the screen display brightness may be determined based on the distance between the projection device and the display screen and the projection brightness of the projection device. In a specific example, the adjustment ratio corresponding to the distance between the projection device and the display screen may be multiplied by the projection brightness of the projection device to obtain the screen display brightness. Optionally, the adjustment ratio corresponding to the distance between the projection device and the display screen may be negatively correlated with the distance between the projection device and the display screen.
[0026] Optionally, the viewing distance is the distance between the user and the picture. The viewing distance can be determined in a variety of ways.
[0027] For example, for a device that displays images on a display screen, a distance sensor may be provided on the display screen, and the distance between the user and the display screen (equivalent to the image) may be detected by the distance sensor on the display screen.
[0028] For another example, the distance between the user and the screen can be determined by a photo of the user taken by a camera. In a specific example, for a projection device to which the color temperature adjustment method of the present application is applied, a camera device can be provided on the projection device, so that a photo of the user and the screen can be taken by the camera device on the projection device, and the distance between the user and the screen can be determined by performing calculations based on the photo of the user and the screen. In another specific example, for a device that displays a screen on a display screen, a camera device can be provided on the display screen, and the distance between the user and the display screen (equivalent to the screen) can be detected by a photo of the user taken by the camera device on the display screen.
[0029] In addition, for a projection device that uses the color temperature adjustment method of the present application, if it is necessary to determine the distance between the projection device and the display screen, the distance between the projection device and the display screen can also be detected based on a distance sensor or a camera device.
[0030] S102: Determine a target color temperature based on the picture display brightness and the viewing distance.
[0031] After the picture display brightness and the viewing distance are determined, the target color temperature of the picture may be determined based on the picture display brightness and the viewing distance.
[0032] Optionally, the target color temperature may be determined based on the picture display brightness and the viewing distance for the purpose of regulating the blue light energy.
[0033] Among them, in one implementation, since the stronger the screen display brightness is, the stronger the blue light energy is, the blue light energy received by the user can be reduced by appropriately lowering the color temperature. Based on this, the first adjustment ratio corresponding to the screen display brightness can be determined, so that the target color temperature obtained by calculating the first adjustment ratio and the current color temperature of the screen is negatively correlated with the screen display brightness within a certain range. In this way, by setting the first adjustment ratio, the blue light energy received by the user can be reduced by lowering the target color temperature when the screen display brightness is stronger. In addition, since the closer the user is to the screen, the stronger the blue light received by the user, the blue light energy can be reduced by appropriately lowering the color temperature. Based on this, the second adjustment ratio corresponding to the viewing distance can be determined, so that the target color temperature obtained by calculating the second adjustment ratio and the current color temperature of the screen is positively correlated with the viewing distance within a certain range. In this way, by setting the second adjustment ratio, the blue light energy received by the user can be reduced by lowering the target color temperature when the viewing distance is smaller.
[0034] Thus, in step S102, the first adjustment ratio corresponding to the screen display brightness and the second adjustment ratio corresponding to the viewing distance can be determined; based on the first adjustment ratio, the second adjustment ratio and the current color temperature, the target color temperature is calculated. Further, when the screen display brightness is within the first preset range, the screen display brightness and the first adjustment ratio may be negatively correlated; when the viewing distance is within the second preset range, the viewing distance and the second adjustment ratio are positively correlated; in step S102, the current color temperature of the screen, the first adjustment ratio and the second adjustment ratio may be multiplied to obtain the target color temperature of the screen. In other achievable methods, the preset color temperature of the screen, the first adjustment ratio and the second adjustment ratio may be multiplied to obtain the target color temperature of the screen. The preset color temperature of the screen may be a preset constant, which is not limited here.
[0035] In addition, the correspondence between the screen display brightness and the first adjustment ratio, and the correspondence between the viewing distance and the second adjustment ratio can be solidified into the memory / processor of the display device before the display device leaves the factory, so that the first adjustment ratio corresponding to the screen display brightness and the second adjustment ratio corresponding to the viewing distance can be determined subsequently when the display device is working.
[0036] In addition, the corresponding relationship between the screen display brightness and the first adjustment ratio, and the corresponding relationship between the viewing distance and the second adjustment ratio can be determined based on the first law of illumination. For example, the correlation between the screen display brightness and the first adjustment ratio can be as follows: Figure 2 The correlation between the viewing distance and the second adjustment ratio can be as follows: Figure 3 A curve is shown.
[0037] In another implementation, the target color temperature may be found from a correspondence table of picture display brightness, viewing distance, and target color temperature according to the picture display brightness and viewing distance.
[0038] Optionally, the correspondence table of picture display brightness, viewing distance and target color temperature may also be determined for the purpose of adjusting the blue light energy received by the user.
[0039] In a specific example, the correspondence table of the screen display brightness, viewing distance and target color temperature may include at least four data: screen display brightness, viewing distance, blue light energy and target color temperature. In this way, the step of determining the correspondence table of the screen display brightness, viewing distance and target color temperature may include: determining the blue light energy received by the user at each screen display brightness, each viewing distance and each screen color temperature, so that the correspondence table of the screen display brightness, viewing distance, target color temperature and blue light energy can be obtained. In order to facilitate the search for the target color temperature from the correspondence table of the screen display brightness, viewing distance and target color temperature, the target blue light energy at different screen display brightness and different viewing distances can also be set, so that in step S102, the target blue light energy can be first determined based on the current screen display brightness and the current viewing distance, and then the target color temperature of the screen can be found from the above correspondence table based on the current screen display brightness, the current viewing distance and the target blue light energy. Optionally, before setting the target blue light energy at different screen display brightness and different viewing distances, the blue light energy received at different screen display brightness and different viewing distances can also be measured to evaluate the blue light energy radiation of the display device, thereby facilitating the setting of the target blue light energy at different screen display brightness and different viewing distances. In addition, the target blue light energy data at different screen display brightness and different viewing distances, as well as the correspondence table of the screen display brightness, viewing distance, target color temperature and blue light energy can be solidified in the memory / processor of the display device before the display device leaves the factory, so as to determine the target color temperature when the display device is working later.
[0040] In another specific example, the correspondence table of the screen display brightness, viewing distance and target color temperature can be a table that only includes the data of the screen display brightness, viewing distance and target color temperature. In this way, the step of determining the correspondence table of the screen display brightness, viewing distance and target color temperature can include: first setting the target blue light energy at different screen display brightness and different viewing distances, and then determining how much the color temperature should be adjusted at each screen brightness and each viewing distance so that the blue light energy received by the user is the target blue light energy, thereby determining the target color temperature at each screen brightness and each viewing distance (i.e., the color temperature corresponding to the target blue light energy), so that the correspondence table of the screen display brightness, viewing distance and target color temperature can be obtained. Optionally, the correspondence table of the screen display brightness, viewing distance and target color temperature can be solidified into the memory / processor of the display device before the display device leaves the factory, so that the target color temperature can be determined later when the display device is working.
[0041] In other embodiments, the target color temperature may be determined based on the screen display brightness and the viewing distance for the purpose of improving the viewing comfort of the screen. Specifically, the illuminance may be determined based on the screen display brightness and the viewing distance, and then the target color temperature may be determined based on the illuminance. Optionally, the illuminance may be determined based on the following example: Figure 4 The Kruithof curve shown is used to find the comfortable color temperature range of the picture under the illumination, and then a value is taken from the color temperature range of the picture as the target color temperature, for example, the middle value or any value can be taken from the color temperature range of the picture as the target color temperature. Among them, the Kruithof curve is an illuminance-color temperature curve that is comfortable and satisfactory to the observer, constructed by Dutch physicist Arie Andries Kruithof by collecting psychophysical data. The lighting-color temperature combination conditions in the unfilled bounded area of the curve are empirically evaluated as pleasant or natural, while the conditions outside the area are considered uncomfortable, unpleasant or unnatural. Optionally, the Kruithof curve can be solidified into the memory / processor of the display device before the display device leaves the factory, so as to determine the target color temperature later when the display device is working. Of course, in other embodiments, the Kruithof curve may not be solidified into the memory / processor of the display device. In this embodiment, when the display device is working, the display device can obtain the Kruithof curve from the server, and search for the target color temperature through the obtained Kruithof curve.
[0042] The method of determining illumination based on the image display brightness and viewing distance is not limited here. For example, the first law of illumination (E = I / R 2) and substitute the screen display brightness and viewing distance to calculate the illumination. For another example, the current screen display brightness and the illumination at the current viewing distance can be found based on the corresponding table of screen display brightness, viewing distance and illumination. Among them, the corresponding table of screen display brightness, viewing distance and illumination can be determined by measuring the illumination at all combinations of screen display brightness and viewing distance through an optical instrument. Optionally, the corresponding table of screen display brightness, viewing distance and illumination can be solidified into the memory / processor of the display device before the display device leaves the factory, so that the illumination can be determined later when the display device is working.
[0043] S103: Adjusting the color temperature of the picture to a target color temperature.
[0044] After determining the target color temperature based on the screen display brightness and the viewing distance, the color temperature of the screen can be adjusted to the target color temperature.
[0045] Optionally, the color temperature of the picture may be adjusted using RGB data of the picture.
[0046] In this embodiment, the screen display brightness and viewing distance are first determined, and then the target color temperature of the screen is determined based on the screen display brightness and viewing distance. Then, the screen color temperature is adjusted to the target color temperature determined based on the screen display brightness and viewing distance. In this way, the screen color temperature can be adaptively adjusted based on the screen display brightness and viewing distance to improve the screen display comfort and / or eye protection effect.
[0047] See also Figure 5 , Figure 5 It is a structural diagram of an embodiment of the color temperature adjustment device of the present application. The color temperature adjustment device 10 of the present application includes a distance detection unit 11, a brightness detection unit 12, a color temperature determination unit 13 and a color temperature control unit 14. The distance detection unit 11 is used to determine the viewing distance, which is the distance between the user and the screen. The brightness detection unit 12 is used to determine the screen display brightness; the color temperature determination unit 13 is used to determine the target color temperature based on the screen display brightness and the viewing distance; the color temperature control unit 14 is used to adjust the color temperature of the screen to the target color temperature. Among them, the connection between the units and the more specific functions of each unit can be found in the description of the above embodiment, which will not be repeated here.
[0048] To better illustrate the color temperature adjustment method of the present application, the following specific embodiments of color temperature adjustment are provided for exemplary explanation:
[0049] Example 1
[0050] Since the higher the screen brightness, the stronger the blue light energy of the screen, the blue light energy can be reduced by appropriately lowering the color temperature;
[0051] Among them, TargetCCTBrightness=OriginalCCT*RatioBrightness;
[0052] RatioBrightness represents the color temperature ratio to be adjusted corresponding to the screen brightness (ie, the first adjustment ratio), and TargetCCTBrightness represents the target screen color temperature under the corresponding screen brightness.
[0053] Since the closer the human eye is to the screen, the stronger the blue light received by the human eye, the blue light energy can be reduced by appropriately lowering the color temperature;
[0054] Among them, TargetCCTDistance=TargetCCTBrightness*RatioDistance;
[0055] RatioDistance represents the color temperature ratio to be adjusted for the corresponding distance (ie, the second adjustment ratio), and TargetCCTDistance represents the target screen color temperature at the corresponding distance.
[0056] Since the energy gain from reducing the same distance is greater at close distances, the color temperature decreases more at close distances, which means that the RatioDistance curve decreases more as the viewing distance decreases.
[0057] The blue light energy received by the human eye can be more accurately judged by combining the screen brightness and distance, and the target color temperature (or color temperature adjustment range) can be determined based on these two factors.
[0058] Optionally, the target color temperature of the image can be calculated using the following expression:
[0059] TargetCCT=OriginalCCT*RatioBrightness*RatioDistance;
[0060] Among them, OriginalCCT is the current color temperature / preset color temperature of the picture, and TargetCCT represents the final target color temperature.
[0061] Example 2
[0062] Because at the same distance, the brightness of the screen determines the strength of the blue light energy of the screen itself; and at the same screen brightness, the distance between people and the screen determines the strength of the blue light received by people; the combination of the two can accurately judge the blue light energy received by the human eye.
[0063] First, the blue light energy at different screen brightness and different distances can be measured to form a mapping table EHEVLUT[Brightnes][Distance]. In this way, the current blue light energy value under the current screen brightness and the current user distance can be determined according to "Current blue light energy value CurrentEHEV=EHEVLUT(current screen brightness, current user distance)", where EHEVLUT(current screen brightness, current user distance) means obtaining the current blue light energy value according to the current screen brightness and the user distance.
[0064] You can also set the target blue light energy TargetEHEV=TargetEHEVLUT (current screen brightness, current user distance) at different screen brightnesses and different user distances. TargetEHEVLUT represents the target blue light energy at different distances and different screen brightnesses, TargetEHEVLUT (current screen brightness, current user distance) represents obtaining the current target blue light energy based on the current distance and screen brightness, and TargetEHEV represents the target blue light energy.
[0065] Since the blue light energy of different screen color temperatures is different at the same screen brightness and the same distance, the three corresponding relationship table EHEVLUT[Brightnes][Distance][CCT] can be measured. Among them, the three corresponding relationship table EHEVLUT[Brightnes][Distance][CCT] can represent the blue light energy at different screen brightness, different viewing distances and different color temperatures.
[0066] Based on the above preparations, when adjusting the color temperature, you can first determine the target blue light energy at the current screen brightness and the current viewing distance; then find the current target color temperature based on the current distance, screen brightness, and target blue light energy, that is, the current target color temperature TargetCCT = TargetCCT (current screen brightness, current user distance, target blue light energy), where TargetCCT (current screen brightness, current user distance, target blue light energy) means obtaining the target color temperature based on the current screen brightness, the current user distance, and the target blue light energy.
[0067] Furthermore, in this embodiment, in addition to the distance detection unit, the brightness detection unit, the color temperature determination unit and the color temperature control unit, the color temperature adjustment device may also include a brightness control unit, a measuring unit and a measuring device distance control unit. Figure 6 As shown, the color temperature adjustment device can measure the mapping relationship table of screen brightness-distance-blue light energy through the cooperation of the brightness control unit, the measurement unit and the measurement device distance control unit. Figure 7As shown, the color temperature adjustment device can also generate a mapping relationship table of screen brightness-color temperature-distance-blue light energy through the cooperation of the brightness control unit, the measuring unit, the measuring device distance control unit and the color temperature control unit.
[0068] Example 3
[0069] The illumination perceived by a person can be measured based on the screen brightness and user distance, that is, the illumination mapping table under all combinations of screen brightness and user distance can be measured by optical instruments. The illumination mapping table can also be solidified into the device memory for subsequent retrieval during color temperature control.
[0070] When adjusting the actual color temperature, you can first find out the current screen brightness and the illumination at the current distance according to the above-mentioned illumination mapping table, that is, the current illumination Currentilluminance = illuminanceLUT (current screen brightness, current user distance); then find the comfortable screen color temperature range under the illumination according to the Cruysov curve, that is, TargetCCT[Min,Max] = KruithofCurve(Currentilluminance), where KruithofCurve(Currentilluminance) represents the comfortable color temperature range defined by the Cruysov curve found according to the input, and TargetCCT[Min,Max] represents the lower limit and upper limit of the target color temperature range; then determine the target color temperature according to the comfortable screen color temperature range under the illumination, for example, take the middle value of the target color temperature range TargetCCT∈TargetCCT[Min,Max] as the target color temperature.
[0071] See also Figure 8 , Figure 8 2 is a schematic diagram of the structure of an electronic device of the present application. The electronic device 20 includes a processor 22, and the processor 22 is used to execute instructions to implement the above color temperature adjustment method. The specific implementation process can be found in the description of the above embodiment, which will not be repeated here.
[0072] The processor 22 may also be referred to as a CPU (Central Processing Unit). The processor 22 may be an integrated circuit chip having signal processing capabilities. The processor 22 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. A general-purpose processor may be a microprocessor or the processor 22 may also be any conventional processor, etc.
[0073] The electronic device 20 may further include a memory 21 for storing instructions and data required for the processor 22 to run.
[0074] The processor 22 is used to execute instructions to implement the method provided by any embodiment of the color temperature adjustment method of the present application and any non-conflicting combination.
[0075] See also Fig. 9 , Fig. 9 The structure diagram of the computer-readable storage medium in the embodiment of the present application. The computer-readable storage medium 30 of the embodiment of the present application stores instructions / program data 31, and when the instructions / program data 31 are executed, the method provided by any embodiment of the color temperature adjustment method of the present application and any non-conflicting combination is implemented. Among them, the instructions / program data 31 can form a program file and be stored in the above-mentioned storage medium 30 in the form of a software product, so that a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) executes all or part of the steps of the methods of each embodiment of the present application. The aforementioned storage medium 30 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 disk or an optical disk, or a terminal device such as a computer, a server, a mobile phone, and a tablet.
[0076] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units 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 an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.
[0077] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0078] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.
[0079] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A color temperature adjustment method, characterized in that: The method comprises: Determine the screen display brightness and viewing distance, wherein the viewing distance is the distance between the user and the screen; Determine a target color temperature based on the picture display brightness and the viewing distance; The color temperature of the picture is adjusted to the target color temperature.
2. The color temperature adjustment method according to claim 1, characterized in that: The determining the target color temperature based on the picture display brightness and the viewing distance includes: With the purpose of regulating blue light energy, the target color temperature is determined based on the screen display brightness and viewing distance.
3. The color temperature adjustment method according to claim 2, characterized in that: The method of determining a target color temperature based on picture display brightness and viewing distance for the purpose of regulating blue light energy includes: determining a first adjustment ratio corresponding to picture display brightness and a second adjustment ratio corresponding to viewing distance; and calculating the target color temperature based on the first adjustment ratio and the second adjustment ratio.
4. The color temperature adjustment method according to claim 3, characterized in that: The picture display brightness is negatively correlated with the first adjustment ratio, and the viewing distance is positively correlated with the second adjustment ratio; The calculating the target color temperature based on the first adjustment ratio and the second adjustment ratio includes: The target color temperature is obtained by multiplying the first adjustment ratio, the second adjustment ratio, and the current color temperature / the preset color temperature of the picture.
5. The color temperature adjustment method according to claim 2, characterized in that: The method of determining the target color temperature based on the screen display brightness and viewing distance for the purpose of regulating the blue light energy includes: The target color temperature is found from a corresponding table of the picture display brightness, the viewing distance and the target color temperature according to the picture display brightness and the viewing distance.
6. The color temperature adjustment method according to claim 5, characterized in that: The correspondence table of the picture display brightness, viewing distance and target color temperature is a correspondence table of the picture display brightness, viewing distance, blue light energy and target color temperature, and the target color temperature is found from the correspondence table of the picture display brightness, viewing distance and target color temperature according to the picture display brightness and the viewing distance, including: Determining the picture display brightness and the target blue light energy at the viewing distance; From the correspondence table of the picture display brightness, viewing distance, blue light energy and target color temperature, the target color temperature under the picture display brightness, the viewing distance and the target blue light energy is found.
7. The color temperature adjustment method according to claim 1, characterized in that: The determining the target color temperature based on the picture display brightness and the viewing distance includes: Determining the picture display brightness and the illumination at the viewing distance; A target color temperature is determined based on the illuminance.
8. The color temperature adjustment method according to claim 7, characterized in that: The determining the picture display brightness and the illumination at the viewing distance includes: Find the image display brightness and the illumination at the viewing distance from a corresponding table of image display brightness, viewing distance and illumination; or, Substituting the picture display brightness and the viewing distance into the first law of illumination, the picture display brightness and the illumination at the viewing distance are obtained.
9. The color temperature adjustment method according to claim 7, characterized in that: The target color temperature is determined according to the illumination and the Cruysov curve.
10. The color temperature adjustment method according to claim 1, characterized in that: The determining of the screen display brightness and viewing distance includes: The viewing distance is detected by using a distance sensor or a camera device.
11. A display device, characterized in that: The method comprises a memory and a processor, wherein the memory and the processor are coupled to each other, and the processor is used to execute program instructions stored in the memory to implement the method according to any one of claims 1 to 10.
12. A computer-readable storage medium having instructions / program data stored thereon, characterized in that: When the instructions / program data are executed, the steps of the method according to any one of claims 1 to 10 are implemented.