White balance adjustment method and device, projection equipment and storage medium

Abstract

The invention relates to a white balance adjustment method and device, projection equipment and a storage medium, and is applied to the technical field of white balance adjustment, and the method comprises the steps: obtaining a standard white field color coordinate of the projection equipment in a target color mixing mode; acquiring parameter information of a plurality of light sources of the projection equipment; based on the standard white field chromaticity coordinates and the parameter information, target light-emitting duration of independent light emitting of each light source in a light-emitting period is determined through a preset strategy; and based on a preset driving sequence corresponding to the plurality of light sources, sequentially driving each light source to emit light independently according to the corresponding target light emitting duration in one light emitting period, and driving the at least two light sources to emit light simultaneously according to the preset light emitting duration. According to the invention, based on the standard white field color coordinates and the parameter information of the projection equipment, the target light-emitting duration of independent light emitting of each light source in the projection equipment can be determined, so that each light source is driven to emit light according to the target light-emitting duration of independent light emitting, and white balance adjustment is realized.

Description

Technical Field

[0001] The present invention relates to a white balance adjustment technology. More specifically, it relates to a white balance adjustment method, device, projection device and storage medium. Background Art

[0002] In order to increase the brightness of the projector, a color mixing mode is designed in the projector. The color mixing mode means that the display brightness of the projector is improved by adding mixed color light (generated by overlapping multiple primary color lights in time sequence) without adding additional compensation light. However, in the color mixing mode, the difficulty of adjusting the white balance of the projector also increases.

[0003] The conventional method for adjusting the white balance in the existing mixed color mode is to store multiple white balance adjustment files in the projector in advance. When the white balance of the projector needs to be adjusted, all the files are tested one by one, and the file with the smallest white balance color cast of the projector is determined from the multiple white balance files.

[0004] However, it takes a lot of time to test multiple white balance files one by one, and the debugging efficiency is low. Summary of the invention

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a white balance adjustment method, device, projection device and storage medium, which can determine the target light emission duration of each light source in the projection device based on the standard white field color coordinates and parameter information of the projection device, thereby driving each light source to emit light according to the target light emission duration of the individual light emission, thereby achieving white balance adjustment.

[0006] In a first aspect, an embodiment of the present application provides a white balance adjustment method, including: obtaining a standard white field color coordinate in a target color mixing mode of a projection device, wherein the white light in the target color mixing mode is: a plurality of primary color lights generated by a plurality of light sources emitting light individually in sequence according to corresponding light emission durations in one light emission cycle and a target mixed color light generated by at least two light sources emitting light simultaneously according to preset light emission durations in one light emission cycle, wherein each light source generates a primary color light, and the plurality of light sources include at least two light sources; obtaining parameter information of a plurality of light sources of the projection device, wherein the parameter information includes: an initial light emission duration of each light source emitting light individually in one light emission cycle; determining a target light emission duration of each light source emitting light individually in one light emission cycle through a preset strategy based on the standard white field color coordinate and the parameter information, wherein the sum of the target light emission durations corresponding to the plurality of light sources is equal to the sum of the initial light emission durations corresponding to the plurality of light sources; and driving each light source in sequence to emit light individually according to the corresponding target light emission duration in one light emission cycle based on a preset driving sequence corresponding to the plurality of light sources, and driving at least two light sources to emit light simultaneously according to the preset light emission duration in one light emission cycle, so that the deviation between the white field color coordinate of the projection device and the standard white field color coordinate is within an allowable deviation range.

[0007] In a second aspect, the present application provides a white balance adjustment device, including: an acquisition module, used to acquire standard white field color coordinates in a target color mixing mode in which a projection device is located, wherein the white light in the target color mixing mode is: a plurality of primary color lights generated by a plurality of light sources emitting light individually in sequence according to corresponding emitting durations in one emitting cycle and a target mixed color light generated by at least two light sources emitting light simultaneously according to preset emitting durations in one emitting cycle, wherein each light source generates a primary color light, and the plurality of light sources include at least two light sources; the acquisition module, used to acquire parameter information of a plurality of light sources of the projection device, wherein the parameter information includes: an initial emitting duration of each light source emitting light individually in one emitting cycle; a determination module, used to determine a target emitting duration of each light source emitting light individually in one emitting cycle through a preset strategy based on the standard white field color coordinates and the parameter information, wherein the sum of the target emitting durations corresponding to the plurality of light sources is equal to the sum of the initial emitting durations corresponding to the plurality of light sources; a driving module, used to drive each light source to emit light individually according to the corresponding target emitting duration in one emitting cycle in sequence based on a preset driving sequence corresponding to the plurality of light sources, and drive at least two light sources to emit light simultaneously according to the preset emitting durations, so that the deviation between the white field color coordinates of the projection device and the standard white field color coordinates is within an allowable deviation range.

[0008] In a third aspect, the present application provides a projection device, comprising: a memory and a processor, the memory being used to store a computer program; the processor being used to execute the white balance adjustment method of the first aspect when calling the computer program.

[0009] In a fourth aspect, the present application provides a computer-readable storage medium, including: a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the white balance adjustment method of the first aspect is implemented.

[0010] In a fifth aspect, the present application provides a computer program product, comprising: when the computer program product is run on a computer, the computer implements the white balance adjustment method as in the first aspect.

[0011] The technical solution provided by the embodiment of the present application has the following advantages over the prior art: In the embodiment of the present application, the standard white field color coordinates in the target color mixing mode of the projection device are obtained, and the white light in the target color mixing mode is: a plurality of primary color lights generated by multiple light sources emitting light individually in sequence according to corresponding emitting durations in one emitting cycle and a target mixed color light generated by at least two light sources emitting light simultaneously according to preset emitting durations, each light source generates one primary color light, and the multiple light sources include at least two light sources; parameter information of the multiple light sources of the projection device is obtained, and the parameter information includes: an initial emitting duration of each light source emitting light individually in one emitting cycle; based on the standard white field color coordinates and the parameter information, a target emitting duration of each light source emitting light individually in one emitting cycle is determined by a preset strategy, and the sum of the target emitting durations corresponding to the multiple light sources is equal to the sum of the initial emitting durations corresponding to the multiple light sources; based on the preset driving sequence corresponding to the multiple light sources, each light source is driven to emit light individually according to the corresponding target emitting duration in one emitting cycle, and at least two light sources are driven to emit light simultaneously according to the preset emitting duration, so that the deviation between the white field color coordinates of the projection device and the standard white field color coordinates is within the allowable deviation range. In this way, by adjusting the duration of each light source emitting light individually, the final white field color coordinates are made within the allowable deviation range of the standard white field color coordinates, so that when each light source is driven to emit light based on the adjusted target light emission duration of each light source individually, the white perceived by the human eye is free of color cast. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0013] Figure 1 One of the flowcharts of the white balance adjustment method according to some embodiments is shown;

[0014] Figure 2 A schematic diagram showing white light synthesized from multiple primary color lights according to some embodiments;

[0015] Figure 3 A schematic diagram showing a synthesis of white light from a plurality of primary color lights and mixed color lights according to some embodiments;

[0016] Figure 4 shows a schematic diagram of a color gamut plane according to some embodiments;

[0017] Figure 5 shows a schematic diagram of a phosphor wheel according to some embodiments;

[0018] Figure 6 A second flowchart of a white balance adjustment method according to some embodiments is shown;

[0019] Figure 7 A third flowchart of a white balance adjustment method according to some embodiments is shown;

[0020] Figure 8 A fourth flowchart of a white balance adjustment method according to some embodiments is shown;

[0021] Fig. 9 FIG5 shows a fifth flow chart of a white balance adjustment method according to some embodiments;

[0022] Fig.10 A schematic structural diagram of a white balance adjustment device according to some embodiments is shown. DETAILED DESCRIPTION

[0023] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0024] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0025] The terms "first", "second", "third", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0026] The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0027] The white balance adjustment method provided in the embodiments of the present application can be used in projection equipment, and the specific projection equipment can have various implementation forms, such as: laser projection equipment, laser TV, LED projection equipment, etc.

[0028] In an embodiment of the present application, a white balance adjustment method is provided, such as Figure 1 As shown, the process includes the following steps 101 to 104.

[0029] 101. Obtain the standard white field color coordinates in the target color mixing mode of the projection device.

[0030] Among them, the white light in the target color mixing mode is: within one light-emitting cycle, multiple light sources emit light in sequence according to the corresponding light-emitting durations to generate multiple primary color lights and at least two light sources emit light at the same time according to the preset light-emitting durations to generate target mixed color light, each light source generates one primary color light, and the multiple light sources include at least two light sources.

[0031] It is understandable that the standard white field color coordinates corresponding to different color mixing modes may be the same or different. In different projection devices, the mixed colors included in the color mixing mode may be the same or different. The color mixing mode includes at least one mixed color.

[0032] It can be understood that white light is a light-emitting cycle in which multiple colors of light emit in turn in a certain sequence. Due to the retention of the human eye, the human eye cannot distinguish the distance between the different colors of light. Each color of light stimulates the corresponding three types of cone cells at the same time, so that the human eye perceives the mixed white light.

[0033] It is understood that the synthesis of white light can be the synthesis of primary color lights generated by each of the multiple light sources emitting light alone, or it can be the synthesis of multiple primary color lights and mixed color lights. Therefore, there are multiple schemes to synthesize white light. Mixed color light is generated when at least two light sources emit light simultaneously.

[0034] Specifically, taking the primary color lights including red primary color light, green primary color light and blue primary color light as an example, the corresponding mixed color lights include yellow light, cyan light and magenta light, among which yellow light is synthesized by red primary color light and green primary color light, cyan light is synthesized by green primary color light and blue primary color light, and magenta light is synthesized by red primary color light and blue primary color light.

[0035] For example, Figure 2 As shown in FIG. 1 , it is a schematic diagram of white light obtained by synthesizing red primary color light R, green primary color light G and blue primary color light B in one light emission cycle. Figure 3 As shown, it is a schematic diagram of white light synthesized by red primary color light R, green primary color light G, blue primary color light B and yellow mixed color light Y in one light emitting cycle. Figure 2 and Figure 3 The duration of each color light in one cycle is given for example only, and the specific duration of the light is determined according to actual needs.

[0036] It should be noted that the primary color lights are determined by the colors of the light sources, such as: if the light sources are red, green and blue, the corresponding primary color lights are: red primary color light, green primary color light and blue primary color light; if the light sources are cyan, yellow and purple light sources, the corresponding primary color lights are: cyan primary color light, yellow primary color light and purple primary color light; this application does not limit the colors of specific light sources.

[0037] It is understandable that the light source may be a laser, an LED lamp or other light source, and this application does not limit this.

[0038] 102. Obtain parameter information of multiple light sources of a projection device.

[0039] The parameter information includes: the initial lighting duration of each light source individually lighting within a lighting cycle.

[0040] It can be understood that, when the duration of the light-emitting cycle remains unchanged, the total duration of each light source emitting light individually will be reduced accordingly due to the addition of mixed-color light in the mixed-color mode.

[0041] 103. Based on the standard white field color coordinates and parameter information, a preset strategy is used to determine the target luminous duration of each light source emitting light individually within a luminous cycle.

[0042] The sum of the target light emitting durations corresponding to the multiple light sources is equal to the sum of the initial light emitting durations corresponding to the multiple light sources.

[0043] It can be understood that the preset strategy is used to indicate the target luminous duration of each light source to be individually illuminated based on the standard white field color coordinates and parameter information. For example: the preset strategy is a target formula, through which the target formula is used to determine the luminous duration of each light source to be individually illuminated corresponding to the standard white field color coordinates and parameter information; the preset strategy is the luminous duration of each light source to be individually illuminated corresponding to each parameter range under the standard white field color coordinates; the preset strategy is based on the standard white field color coordinates and parameter information, and according to the preset step, the luminous duration of each light source to be individually adjusted.

[0044] It is understandable that the light source will affect the size of the white field color coordinates. Figure 4Schematic diagram of the color gamut plane shown. The three areas within the horseshoe range are red, green, and blue. Among them, the green range is located in the upper left area of ​​the horseshoe diagram. The closer to the edge of the area, the purer the green color. Similarly, blue is located in the lower left corner area. The closer to the lower left corner area, the purer the blue color. Red is located in the lower right corner area. The closer to the lower right area, the purer the red color. When the white field color coordinates shift in the color gamut diagram, the area to which they shift will cause the white to shift toward that color. The black circular area within the horseshoe range is the range of the white field color coordinates. If it exceeds this range, the white will be color cast (white balance imbalance). If the x coordinate is too large, the white will be pink or yellow, etc. If x is too small, the white will be blue. If y is too large, the white will be green. If y is too small, the white will be pink or purple.

[0045] It can be understood that there are two ways to change the white field color coordinates: one is to modify the driving current of the light source, and the second is to modify the light emission duration of the light source. In the laser fluorescent system, it is composed of an excitation light source and a wavelength conversion material phosphor. The excitation light can be a blue laser, and the wavelength conversion material phosphor is a phosphor of a different color. The blue laser excites the phosphor to emit light corresponding to the color of the phosphor, and the required primary color light comes out after passing through the color filter. The primary color light is synthesized into white light. In the process of adjustment, since the size of each phosphor segment is fixed during the manufacturing process of the phosphor wheel, the duration corresponding to each phosphor segment is fixed within a light emission cycle in which the phosphor wheel rotates one circle. Therefore, in the laser fluorescent system, it is impossible to change the light emission duration, and only the driving current corresponding to each phosphor segment can be changed. For example Figure 5 The figure shows a schematic diagram of a phosphor wheel structure. In the annular area of ​​the phosphor wheel, the R area is the red phosphor area, the G area is the green phosphor area, the B area is the blue laser transmission area, and the Y area is the yellow mixed color area. In one rotation cycle (luminous cycle), the angles occupied by each area are different, and the corresponding luminous duration is also different. After the phosphor wheel is fixed, the luminous duration of each color segment is also fixed.

[0046] It can be understood that in the white balance adjustment process with mixed colors, what is adjusted in the embodiment of the present application is the duration of each primary color light emitting separately, and the preset duration of the mixed color light emitting is not changed. This is because multiple primary colors and mixed colors synthesize white light together, but the synthesis is not a simple linear accumulation, but a weighted calculation. Determining the weights requires high computing power for the laser device, and adjusting the mixed color light has a greater impact on the brightness of the white field, especially the yellow mixed color light has a greater impact on the brightness. Compared with the mixed color light, when there is mixed color, the primary color light has a smaller impact on the brightness. Therefore, the embodiment of the present application only adjusts the duration of the primary color light emission, which can not only simplify the calculation, reduce the time required for adjustment, and improve the adjustment efficiency, but also can reduce the brightness loss of the white field after adjustment.

[0047] 104. Based on a preset driving sequence corresponding to the multiple light sources, drive each light source in turn to emit light individually according to the corresponding target light emission duration within a light emission cycle, and drive at least two light sources to emit light simultaneously according to the preset light emission duration.

[0048] Among them, based on the preset driving sequence corresponding to the multiple light sources, each light source is driven in turn to emit light according to the corresponding target light-emitting duration within one light-emitting cycle, and at least two light sources are driven to emit light simultaneously according to the preset light-emitting duration, so that the deviation between the white field color coordinates of the projection device and the standard white field color coordinates is within the allowable deviation range.

[0049] It is understandable that after a period of use, the projection equipment may have a color cast on the white field color coordinates due to aging of the light source and other reasons, and the white displayed in the projection image may have a color cast. The white field color coordinates can be adjusted to within the allowable deviation range of the standard white field color coordinates by changing the driving current of the light source or adjusting the light emission time of the light source.

[0050] It can be understood that the lighting order of each light source in the projection device is not changed in the embodiment of the present application. In a lighting cycle, the white field color coordinates of the projection device are adjusted by adjusting the duration of each light source individually lighting, so that the adjusted white field color coordinates are within the allowable deviation range of the standard white field color coordinates (within this range, the human eye cannot perceive the difference).

[0051] In an embodiment of the present application, the standard white field color coordinates of the target color mixing mode of the projection device are obtained, and the white light in the target color mixing mode is: a plurality of primary color lights generated by a plurality of light sources emitting light individually in sequence according to corresponding emitting durations in one emitting cycle and a target mixed color light generated by at least two light sources emitting light simultaneously according to preset emitting durations in one emitting cycle, each light source generates a primary color light, and the plurality of light sources include at least two light sources; parameter information of the plurality of light sources of the projection device is obtained, and the parameter information includes: an initial emitting duration of each light source emitting light individually in one emitting cycle; based on the standard white field color coordinates and the parameter information, a target emitting duration of each light source emitting light individually in one emitting cycle is determined by a preset strategy, and the sum of the target emitting durations corresponding to the plurality of light sources is equal to the sum of the initial emitting durations corresponding to the plurality of light sources; based on the preset driving sequence corresponding to the plurality of light sources, each light source is driven to emit light individually according to the corresponding target emitting duration in one emitting cycle in sequence, and at least two light sources are driven to emit light simultaneously according to the preset emitting duration, so that the deviation between the white field color coordinates of the projection device and the standard white field color coordinates is within an allowable deviation range. In this way, by adjusting the duration of each light source emitting light individually, the final white field color coordinates are made within the allowable deviation range of the standard white field color coordinates, so that when each light source is driven to emit light based on the adjusted target light emission duration of each light source individually, the white perceived by the human eye is free of color cast.

[0052] In some embodiments of the present application, the parameter information also includes: preset light emission duration, initial illuminance and color coordinates of each primary color light, the multiple primary color lights include: the first primary color light corresponding to the first light source, the second primary color light corresponding to the second light source and the third primary color light corresponding to the third light source, the target mixed color light includes the first primary color light and the second primary color light; Figure 1 ,like Figure 6 As shown, the above step 103 can be specifically implemented through the following steps 103a to 103e.

[0053] 103a. Determine the unit illuminance of each primary color light based on the ratio of the initial illuminance of each primary color light to the initial light emission duration.

[0054] It can be understood that the initial illuminance of each primary color light is the initial illuminance of each primary color light measured by an illuminance meter before the projection device adjusts the light emission duration of each light source.

[0055] It can be understood that the unit illuminance of each primary color light is the ratio of the initial illuminance of each primary color light to the initial luminous duration; or, the unit illuminance of each primary color light is the ratio of the initial illuminance of each primary color light to the initial luminous proportion, and the initial luminous proportion is the proportion of the initial luminous duration in the duration of a luminous cycle.

[0056] 103b. Determine a first illuminance of the first primary color light based on the product of the unit illuminance of the first primary color light and the preset light emission duration, and determine a second illuminance of the second primary color light based on the product of the unit illuminance of the second primary color light and the preset light emission duration.

[0057] It can be understood that according to Grassmann's color law, the illuminance of the mixed light is equal to the sum of the illuminances of the primary colors included in the mixed light. Therefore, the illuminance of the primary colors included in the target mixed light is calculated based on the unit illuminance and the preset luminous duration of the target mixed light.

[0058] 103c. Determine the sum of the initial illuminance of the first primary color light and the first illuminance as the target illuminance of the first primary color light.

[0059] 103d. Determine the sum of the initial illuminance of the second primary color light and the second illuminance as the target illuminance of the second primary color light.

[0060] It can be understood that any mixed color light can be decomposed into multiple primary color lights, and the target mixed color light is generated by the first light source and the second light source emitting light simultaneously, that is, the target mixed color light includes: the first primary color light generated by the first light source and the second primary color light generated by the second light source. According to the unit illuminance of each primary color light and the preset luminous duration of the target mixed color, the illuminance of each primary color light included in the target mixed color can be determined; the illuminance of each primary color light included in the target mixed color is added to the initial illuminance of the corresponding primary color light to obtain the target illuminance of each primary color light and the mixed color light combined.

[0061] 103e. Based on the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, the standard white field color coordinates and the color coordinates of each primary color light, a preset strategy is used to determine the target luminous duration of each light source emitting light individually within a luminous cycle.

[0062] It can be understood that the target luminous duration of each light source emitting light individually within a luminous cycle is determined based on the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, the standard white field color coordinates and the color coordinates of each primary color light. Specifically, the target luminous duration of each light source emitting light individually within a luminous cycle can be calculated through a formula based on the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, the standard white field color coordinates and the color coordinates of each primary color light. It can also be based on multiple preset correspondences pre-stored in the projection device to determine the target luminous duration of each light source emitting light individually in a preset correspondence that matches the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, the standard white field color coordinates and the color coordinates of each primary color light.

[0063] Specifically, in some embodiments, the preset strategy is a target formula, combined with Figure 6 ,like Figure 7 As shown, the above step 103e can be specifically implemented through the following step 103f.

[0064] 103f. Based on the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, the standard white field color coordinates and the color coordinates of each primary color light, the target luminous duration of each light source individually is determined through a target formula.

[0065] The target formula is:

[0066]

[0067] x is the horizontal coordinate of the standard white field color coordinate, y is the vertical coordinate of the standard white field color coordinate, D r is the target luminous duration of the first light source, D b is the target luminous duration of the second light source, D g is the target luminous duration of the third light source, D i is the preset luminous duration of the target mixed color light, x r is the abscissa of the color coordinates of the first primary color light, T is the duration of a lighting cycle, x g is the abscissa of the color coordinate of the second primary color light, x b is the abscissa of the color coordinates of the third primary color light, y ris the ordinate of the color coordinate of the first primary color light, y g is the ordinate of the color coordinate of the second primary color light, y b is the ordinate of the color coordinate of the third primary color light, C r =Y r / y r , C g =Y g / y g , C b =Y b / y b , Y r is the target illuminance of the first primary color light, Y g is the target illuminance of the second primary color light, Y b is the initial illuminance of the third primary color light.

[0068] Optionally, when the unit illuminance of each primary color light is the ratio of the initial illuminance of each primary color light to the initial luminous proportion, the above target formula can also be expressed as:

[0069]

[0070] x is the horizontal coordinate of the standard white field color coordinate, y is the vertical coordinate of the standard white field color coordinate, d r is the proportion of the target luminous duration of the first light source in a luminous cycle, d b is the proportion of the target lighting duration of the second light source in a lighting cycle, d g is the proportion of the target luminous duration of the third light source in a luminous cycle, d i is the proportion of the preset luminous duration of the target mixed color light in a luminous cycle, x r is the abscissa of the color coordinates of the first primary color light, x g is the abscissa of the color coordinate of the second primary color light, x b is the abscissa of the color coordinates of the third primary color light, y r is the ordinate of the color coordinate of the first primary color light, y g is the ordinate of the color coordinate of the second primary color light, y b is the ordinate of the color coordinate of the third primary color light, C r =Y r / y r , C g =Y g / y g , C b =Y b / y b , Y r is the target illuminance of the first primary color light, Y g is the target illuminance of the second primary color light, Y b is the initial illuminance of the third primary color light.

[0071] By obtaining the proportion of each light source in a light-emitting cycle and according to the duration of a light-emitting cycle, the target light-emitting duration of each light source individually is determined.

[0072] It can be understood that, through the target formula, the target luminous duration of each light source can be quickly obtained, thereby shortening the duration of white balance adjustment and improving adjustment efficiency.

[0073] Specifically, in some embodiments, the preset strategy is a plurality of preset correspondences corresponding to the standard white field color coordinates, each preset correspondence is used to indicate: the illuminance range of the first primary color light, the illuminance range of the second primary color light, the illuminance range of the third primary color light, the color coordinate range of the first primary color light, the color coordinate range of the second primary color light, the color coordinate range of the third primary color light and the corresponding relationship between the duration of each light source emitting light individually. Figure 6 ,like Figure 8 As shown, the above step 103e can be specifically implemented through the following steps 103g and 103h.

[0074] 103g. Determine a target corresponding relationship that matches the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, and the color coordinates of each primary color light from a plurality of preset corresponding relationships corresponding to the standard white field color coordinates.

[0075] It can be understood that from multiple preset correspondences corresponding to the standard white field color coordinates, a target correspondence that matches the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, and the color coordinates of each primary color light is determined. Specifically, among the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, and the color coordinates of each primary color light, at least a preset number of parameters fall within the corresponding range of the preset correspondence, then the preset correspondence is determined to be the target correspondence. The specific preset number is determined according to actual needs and is not limited in the embodiments of the present application.

[0076] Exemplarily, the target illuminance of the first primary color light falls within the target illuminance range of the first primary color light, the target illuminance of the second primary color light falls within the target illuminance range of the second primary color light, the target illuminance of the third primary color light falls within the target illuminance range of the third primary color light, the color coordinates of the first primary color light fall within the target color coordinate range of the first primary color light, the color coordinates of the second primary color light fall within the target color coordinate range of the second primary color light, and the color coordinates of the third primary color light fall within the target color coordinate range of the third primary color light; then the duration of each light source corresponding to the target illuminance range of the first primary color light, the target illuminance range of the second primary color light, the target illuminance range of the third primary color light, the target color coordinate range of the first primary color light, the target color coordinate range of the second primary color light, and the target color coordinate range of the third primary color light is determined as the target light emission duration.

[0077] 103h. Determine the duration of each light source emitting light individually in the target corresponding relationship as the corresponding target emitting light duration.

[0078] It can be understood that multiple preset correspondences are pre-stored in the projection device, and the target correspondence that matches the parameter information is determined based on the parameter information, and then the duration of each light source emitting light is determined based on the target correspondence. In this way, it is only necessary to screen from multiple preset correspondences, which reduces the requirements on the computing power of the projection device and reduces the data processing pressure of the projection device.

[0079] In the embodiment of the present application, the parameter information also includes: a preset duration, an initial illuminance and a color coordinate of each primary color light, the multiple primary color lights include: a first primary color light corresponding to a first light source, a second primary color light corresponding to a second light source, and a third primary color light corresponding to a third light source, and the target mixed color light includes the first primary color light and the second primary color light; based on the ratio of the initial illuminance of each primary color light to the initial light emission duration, the unit illuminance of each primary color light is determined; based on the product of the unit illuminance of the first primary color light and the preset duration, the first illuminance of the first primary color light is determined, and based on the unit illuminance of the first primary color light and the preset duration, the first illuminance of the first primary color light is determined. The second illuminance of the second primary color light is determined by multiplying the unit illuminance of the two primary color lights by the preset duration; the sum of the initial illuminance of the first primary color light and the first illuminance is determined as the target illuminance of the first primary color light; the sum of the initial illuminance of the second primary color light and the second illuminance is determined as the target illuminance of the second primary color light; based on the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, the standard white field color coordinates and the color coordinates of each primary color light, the target luminous duration of each light source emitting light individually within a luminous cycle is determined. Specifically, the target luminous duration of each light source emitting light individually can be determined through a target formula based on the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, the standard white field color coordinates, and the color coordinates of each primary color light; or a target corresponding relationship matching the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, and the color coordinates of each primary color light can be determined from a plurality of preset corresponding relationships corresponding to the standard white field color coordinates, each preset corresponding relationship being used to indicate: the corresponding relationship between the illuminance range of the first primary color light, the illuminance range of the second primary color light, the illuminance range of the third primary color light, the color coordinate range of the first primary color light, the color coordinate range of the second primary color light, the color coordinate range of the third primary color light and the duration of each light source emitting light individually; and the duration of each light source emitting light individually in the target corresponding relationship is determined to be the corresponding target luminous duration. In this way, the method of determining the target luminous duration of each light source can be flexibly selected according to the projection equipment. When there are high requirements for adjustment efficiency, the target formula method can be selected. When it is required to reduce the computing power of the projection equipment, the method of pre-storing multiple preset corresponding relationships can be selected.

[0080] In some embodiments of the present application, the parameter information also includes: initial white field color coordinates (x1, y1); standard white field color coordinates are (x0, y0); multiple light sources include: red light source, green light source and blue light source; combined Figure 1 ,like Fig. 9 As shown, the above step 103 can be specifically implemented through the following step S1 and steps 103i and 103j.

[0081] Execute step S1, specifically, step S1 includes the following steps S11 to S18.

[0082] S11. When the difference between x1 and x0 is greater than or equal to the first difference threshold, and the absolute value of the difference between y1 and y0 is less than the second difference threshold, the red light source is used as the target light source, and the difference between x1 and x0 is used as the target difference, and adjustment is performed according to the first adjustment strategy.

[0083] It can be understood that when the difference between x1 and x0 is greater than or equal to the first difference threshold, and the difference between y1 and y0 is less than the second difference threshold, or the difference between x1 and x0 is greater than or equal to the first difference threshold, and the difference between y0 and y1 is less than the second difference threshold, it means that the white light has color cast due to the high proportion of red light in the white light (the value of x represents the proportion of red light in the white light), and therefore, the light emission time of the red light source is reduced to reduce the proportion of red light in the white light.

[0084] S12. When the difference between x0 and x1 is greater than or equal to the first difference threshold, and the absolute value of the difference between y1 and y0 is less than the second difference threshold, use the red light source as the target light source, and use the difference between x0 and x1 as the target difference, and adjust according to the second adjustment strategy.

[0085] It can be understood that when the difference between x0 and x1 is greater than or equal to the first difference threshold, and the difference between y1 and y0 is less than the second difference threshold, or the difference between x0 and x1 is greater than or equal to the first difference threshold, and the difference between y0 and y1 is less than the second difference threshold, it means that the white light has a color cast due to the low proportion of red light in the white light. Therefore, the light emission time of the red light source is increased to increase the proportion of red light in the white light.

[0086] S13. When the difference between y1 and y0 is greater than or equal to the second difference threshold, and the absolute value of the difference between x1 and x0 is less than the first difference threshold, take the green light source as the target light source, and take the difference between y1 and y0 as the target difference, and adjust according to the first adjustment strategy.

[0087] It can be understood that when the difference between y1 and y0 is greater than or equal to the second difference threshold and the difference between x1 and x0 is less than the first difference threshold, or, when the difference between y1 and y0 is greater than or equal to the first difference threshold and the difference between x0 and x1 is less than the second difference threshold, it means that the white light has color cast due to the high proportion of green light in the white light. Therefore, the light emission time of the green light source is reduced to reduce the proportion of green light in the white light.

[0088] S14. When the difference between y0 and y1 is greater than or equal to the second difference threshold, and the absolute value of the difference between x1 and x0 is less than the first difference threshold, use the green light source as the target light source, and use the difference between y0 and y1 as the target difference, and adjust according to the second adjustment strategy.

[0089] It can be understood that when the difference between y0 and y1 is greater than or equal to the second difference threshold and the difference between x1 and x0 is less than the first difference threshold, or, when the difference between y0 and y1 is greater than or equal to the first difference threshold and the difference between x0 and x1 is less than the second difference threshold, it means that the white light has color cast due to the low proportion of green light in the white light. Therefore, the light emission time of the green light source is increased to increase the proportion of green light in the white light.

[0090] S15. When the difference between x1 and x0 is greater than or equal to the first difference threshold, and the difference between y1 and y0 is greater than or equal to the second difference threshold, use the blue light source as the target light source, and use the smaller of the difference between x1 and x0 and the difference between y0 and y1 as the target difference, and adjust according to the second adjustment strategy.

[0091] It can be understood that white light is obtained by mixing red light, green light and blue light. For example, if the proportion of red light in white light is x, the proportion of green light in white light is y, then the proportion of blue light in white light is (1-xy). Therefore, adjusting the emission time of the blue light source has an impact on the proportion of green light and red light in white light, that is, when adjusting the emission time of the blue light source, the x value and y value in the white field color coordinate change in the same direction, that is, when the emission time of the blue light source increases, the x value and y value will both decrease, and when the emission time of the blue light source decreases, the x value and y value will both increase.

[0092] It can be understood that since changing the proportion of blue light in white light can simultaneously affect the proportion of green light and red light in white light, and adjusting the proportion of blue light relative to adjusting green light and red light, the brightness loss of the displayed image is also less. Therefore, when the coordinate value of the acquired white field color coordinate is larger or smaller than the coordinate value of the standard white field color coordinate, first adjust the emission time of the blue light source, then the x value and y value will change in the same direction, achieving the goal of reducing the brightness loss of the displayed image while improving the adjustment efficiency.

[0093] It can be understood that when the difference between x1 and x0 is greater than or equal to the first difference threshold, and the difference between y1 and y0 is greater than or equal to the second difference threshold, it means that the white light has color cast due to the high proportions of green light and red light in the white light. Therefore, the emission time of blue light is increased to reduce the proportion of green light and red light in the white light.

[0094] S16. When the difference between x0 and x1 is greater than or equal to the first difference threshold, and the difference between y0 and y1 is greater than or equal to the second difference threshold, use the blue light source as the target light source, and use the smaller of the difference between x1 and x0 and the difference between y0 and y1 as the target difference, and adjust according to the first adjustment strategy.

[0095] It can be understood that when the difference between x0 and x1 is greater than or equal to the first difference threshold, and the difference between y0 and y1 is greater than or equal to the second difference threshold, it means that the white light has a color cast because the proportions of green light and red light in the white light are both low. Therefore, the emission time of blue light is reduced to increase the proportion of green light and red light in the white light.

[0096] It can be understood that when the absolute value of the difference between x1 and x0 is less than the first difference threshold, and the difference between y1 and y0 is less than the second difference threshold, it means that the deviation between (x1, y1) and (x0, y0) is within the allowable deviation range.

[0097] S17, obtaining the white field color coordinates (x2, y2) of the projection device.

[0098] It can be understood that the white field color coordinates of the adjusted projection device are obtained to determine again whether the adjusted white field color coordinates (x2, y2) meet the target conditions. If not, the adjustment continues. If so, the adjustment ends to obtain the adjusted white field color coordinates within the allowable deviation range.

[0099] S18. Determine whether (x2, y2) meets the target condition.

[0100] If yes, execute step 103i; otherwise, execute step 103j.

[0101] The target condition is that the absolute value of the difference between x2 and x0 is less than the first difference threshold, and the absolute value of the difference between y2 and y0 is less than the second difference threshold.

[0102] 103i. Determine the duration of each light source corresponding to (x2, y2) emitting light individually as the target emitting light duration.

[0103] It can be understood that when the duration of each light source emitting light individually is recorded at (x2, y2), and when the adjusted white field color coordinates (x2, y2) meet the target conditions, the recorded duration of each light source emitting light individually is determined as the target emitting duration.

[0104] 103j. Determine (x2, y2) as (x1, y1).

[0105] Return to step S1 and execute until (x2, y2) meets the target condition.

[0106] Among them, the first adjustment strategy is used to indicate that the duration of the target light source emitting light alone is reduced by the target duration, and adaptively adjusts the duration of the other light sources among the multiple light sources except the target light source emitting light alone; the second adjustment strategy is used to indicate that the duration of the target light source emitting light alone is increased by the target duration, and adaptively adjusts the duration of the other light sources among the multiple light sources except the target light source emitting light alone.

[0107] It can be understood that the target duration is pre-set as needed. When the deviation between the adjusted white field color coordinates and the standard white field color coordinates is required to be smaller, the target duration can be set smaller; when higher adjustment efficiency is required, the target duration can be set larger.

[0108] It can be understood that the adaptive adjustment of the duration of the light emission of other light sources other than the target light source among the multiple light sources, specifically, the duration of a light cycle remains unchanged, the preset light emission duration of the target mixed color remains unchanged, and the sum of the duration of the light emission of each light source in the multiple light sources remains unchanged. When the light emission duration of the target light source is reduced by the target duration, the sum of the increase of the duration of the light emission of other light sources other than the target light source is the target duration; when the light emission duration of the target light source is increased by the target duration, the sum of the decrease of the duration of the light emission of other light sources other than the target light source is the target duration. The specific change mode of the duration of the light emission of other light sources other than the target light source is determined according to the actual situation. The light emission duration of one of the other light sources can be increased or reduced by the target duration, or the target duration can be allocated to other light sources in proportion. For example, if the target light source is a red light source, the target duration is 1 millisecond, the time allocation ratio of the green light source and the red light source is 2:8, and the light emission duration of the red light source increases by 1 millisecond, then the light emission duration of the green light source is reduced by 200 microseconds, and the light emission duration of the blue light source is reduced by 800 microseconds.

[0109] Optionally, when the target difference falls within the first range, the target duration is the first duration; when the target difference falls within the second range, the target duration is the second duration, any value in the first range is greater than any value in the second range, and the first duration is greater than the second duration.

[0110] It can be understood that when the target difference is large, a larger step size can be used for step-by-step adjustment to reduce the target difference more quickly and improve the adjustment efficiency; when the target difference is small, a smaller step size can be used for step-by-step adjustment to reduce the deviation between the adjusted white length color coordinates and the standard white field color coordinates and improve the adjustment accuracy.

[0111] Optionally, the first adjustment strategy is specifically used to indicate that the duration of the target light source emitting light alone is reduced by a target duration, and the duration of the other light sources among the multiple light sources except the target light source emitting light alone is increased by half of the target duration; the second adjustment strategy is specifically used to indicate that the duration of the target light source emitting light alone is increased by a target duration, and the duration of the other light sources among the multiple light sources except the target light source emitting light alone is reduced by half of the target duration.

[0112] For example, the target light source is a blue light source, and the target duration is 1 millisecond. If the emission duration of the blue light source is increased by 1 millisecond, the emission duration of the green light source is reduced by 500 microseconds, and the emission duration of the red light source is reduced by 500 microseconds. Increasing the emission duration of the blue light source can reduce both the x value and the y value. Then reducing the emission duration of the green light source and the emission duration of the red light source can further reduce the x value and the y value, thereby improving the adjustment efficiency.

[0113] In the embodiment of the present application, the parameter information also includes: an initial white field color coordinate (x1, y1); a standard white field color coordinate is (x0, y0); a plurality of light sources include: a red light source, a green light source and a blue light source; based on the standard white field color coordinate and the parameter information, determining a target light emission duration of each light source individually emitting light within a light emission cycle, including: executing step S1, step S1 includes: when the difference between x1 and x0 is greater than or equal to a first difference threshold, and the absolute value of the difference between y1 and y0 is less than a second difference threshold, taking the red light source as the target light source, and taking the difference between x1 and x0 as the target difference, and adjusting according to the first adjustment strategy; when the difference between x0 and x1 is greater than or equal to the first difference threshold, and the absolute value of the difference between y1 and y0 is less than a second difference threshold; When the value is less than the second difference threshold, the red light source is used as the target light source, and the difference between x0 and x1 is used as the target difference, and the adjustment is made according to the second adjustment strategy; when the difference between y1 and y0 is greater than or equal to the second difference threshold, and the absolute value of the difference between x1 and x0 is less than the first difference threshold, the green light source is used as the target light source, and the difference between y1 and y0 is used as the target difference, and the adjustment is made according to the first adjustment strategy; when the difference between y0 and y1 is greater than or equal to the second difference threshold, and the absolute value of the difference between x1 and x0 is less than the first difference threshold, the green light source is used as the target light source, and the difference between y0 and y1 is used as the target difference, and the adjustment is made according to the second adjustment strategy; when the difference between x1 and x0 is greater than or equal to the first difference threshold value threshold, and the difference between y1 and y0 is greater than or equal to the second difference threshold, the blue light source is used as the target light source, and the smaller of the difference between x1 and x0 and the difference between y0 and y1 is used as the target difference, and the adjustment is made according to the second adjustment strategy; when the difference between x0 and x1 is greater than or equal to the first difference threshold, and the difference between y0 and y1 is greater than or equal to the second difference threshold, the blue light source is used as the target light source, and the smaller of the difference between x1 and x0 and the difference between y0 and y1 is used as the target difference, and the adjustment is made according to the first adjustment strategy; the white field color coordinates (x2, y2) of the projection device are obtained; it is determined whether (x2, y2) meets the target condition, and the target condition is that the absolute value of the difference between x2 and x0 is less than the first difference threshold, and the difference between y2 and y0 is less than the first difference threshold. The absolute value of the value is less than the second difference threshold; when (x2, y2) meets the target condition, the duration of each light source corresponding to (x2, y2) emitting light individually is determined to be the target emitting light duration; when (x2, y2) does not meet the target condition, (x2, y2) is determined to be (x1, y1) and returns to execute step S1 until (x2, y2) meets the target condition; wherein the first adjustment strategy is used to indicate that the duration of the target light source emitting light individually is reduced by the target duration, and the duration of the other light sources other than the target light source in the multiple light sources emitting light individually is adaptively adjusted; the second adjustment strategy is used to indicate that the duration of the target light source emitting light individually is increased by the target duration, and the duration of the other light sources other than the target light source in the multiple light sources emitting light individually is adaptively adjusted;Specifically, when the target difference falls within the first range, the target duration is the first duration; when the target difference falls within the second range, the target duration is the second duration, any value in the first range is greater than any value in the second range, and the first duration is greater than the second duration; the first adjustment strategy is specifically used to indicate that the duration of the target light source emitting light alone is reduced by the target duration, and the duration of the other light sources among the multiple light sources except the target light source emitting light alone is increased by half of the target duration; the second adjustment strategy is specifically used to indicate that the duration of the target light source emitting light alone is increased by the target duration, and the duration of the other light sources among the multiple light sources except the target light source emitting light alone is reduced by half of the target duration. In this way, according to the preset step length, the luminous duration of the target light source is gradually reduced or increased, and the luminous duration of other light sources is adaptively adjusted, so that the deviation between the final white field color coordinates and the standard white field color coordinates is within the allowable deviation range; and when the deviation between the white field color coordinates and the standard white field color coordinates is large, it can be adjusted with a larger step length to make the white field color coordinates quickly approach the standard white field color coordinates; when the deviation between the white field color coordinates and the standard white field color coordinates is small, it can be adjusted with a smaller step length to make the deviation between the final white field color coordinates and the standard white field color coordinates smaller, thereby improving the adjustment accuracy. ;

[0114] In the present application embodiment, Fig.10 As shown, a white balance adjustment device is provided, including: an acquisition module 1001, used to acquire the standard white field color coordinates in the target color mixing mode of the projection device, the white light in the target color mixing mode is: in one light-emitting cycle, multiple light sources sequentially emit light according to the corresponding light-emitting duration to generate multiple primary color lights and at least two light sources emit light according to the preset light-emitting duration to generate target mixed color light, each light source generates one primary color light, and the multiple light sources include at least two light sources; the acquisition module 1001 is also used to acquire parameter information of the multiple light sources of the projection device, the parameter information includes: in one light-emitting cycle, the initial light emission of each light source alone; Light duration; a determination module 1002, which is used to determine the target light duration of each light source within a light-emitting cycle through a preset strategy based on the standard white field color coordinates and parameter information, and the sum of the target light durations corresponding to the multiple light sources is equal to the sum of the initial light durations corresponding to the multiple light sources; a driving module 1003, which is used to drive each light source in turn to emit light according to the corresponding target light duration within a light-emitting cycle based on a preset driving sequence corresponding to the multiple light sources, and drive at least two light sources to emit light simultaneously according to the preset light duration, so that the deviation between the white field color coordinates of the projection device and the standard white field color coordinates is within the allowable deviation range.

[0115] In some embodiments of the present application, the parameter information also includes: a preset light emission duration, an initial illuminance and color coordinates of each primary color light, the multiple primary color lights include: a first primary color light corresponding to a first light source, a second primary color light corresponding to a second light source, and a third primary color light corresponding to a third light source, and the target mixed color light includes the first primary color light and the second primary color light; the determination module 1002 is specifically used to determine the unit illuminance of each primary color light based on the ratio of the initial illuminance of each primary color light to the initial light emission duration; determine the first illuminance of the first primary color light based on the product of the unit illuminance of the first primary color light and the preset light emission duration; The target illuminance of the first primary color light is determined by multiplying the unit illuminance of the second primary color light by the preset luminous duration. The sum of the initial illuminance of the first primary color light and the first illuminance is determined as the target illuminance of the first primary color light. The sum of the initial illuminance of the second primary color light and the second illuminance is determined as the target illuminance of the second primary color light. Based on the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, the standard white field color coordinates and the color coordinates of each primary color light, the target luminous duration of each light source emitting light individually within a luminous cycle is determined by a preset strategy.

[0116] In some embodiments of the present application, the preset strategy is a target formula; the target formula is:

[0117]

[0118] Where x is the horizontal coordinate of the standard white field color coordinate, y is the vertical coordinate of the standard white field color coordinate, D r is the target luminous duration of the first light source, D b is the target luminous duration of the second light source, D g is the target luminous duration of the third light source, D i is the preset luminous duration of the target mixed color light, x r is the abscissa of the color coordinates of the first primary color light, T is the duration of a lighting cycle, x g is the abscissa of the color coordinate of the second primary color light, x b is the abscissa of the color coordinates of the third primary color light, y r is the ordinate of the color coordinate of the first primary color light, y g is the ordinate of the color coordinate of the second primary color light, y b is the ordinate of the color coordinate of the third primary color light, C r =Y r / y r , C g =Y g / y g , C b =Y b / y b , Y r is the target illuminance of the first primary color light, Y gis the target illuminance of the second primary color light, Y b is the initial illuminance of the third primary color light.

[0119] In some embodiments of the present application, the preset strategy is a plurality of preset correspondences corresponding to the standard white field color coordinates, and each preset correspondence is used to indicate: the illumination range of the first primary color light, the illumination range of the second primary color light, the illumination range of the third primary color light, the color coordinate range of the first primary color light, the color coordinate range of the second primary color light, the color coordinate range of the third primary color light and the correspondence between each light source's individual luminescence duration; the determination module 1002 is specifically used to determine, from the plurality of preset correspondences corresponding to the standard white field color coordinates, a target correspondence matching the target illumination of the first primary color light, the target illumination of the second primary color light, the initial illumination of the third primary color light, and the color coordinates of each primary color light; and determine that the individual luminescence duration of each light source in the target correspondence is the corresponding target luminescence duration.

[0120] In some embodiments of the present application, the parameter information also includes: initial white field color coordinates (x1, y1); standard white field color coordinates are (x0, y0); multiple light sources include: red light source, green light source and blue light source; the determination module 1002 is specifically used to execute step S1, and when (x2, y2) meets the target condition, determine that the duration of each light source corresponding to (x2, y2) emitting light individually is the target emitting duration; when (x2, y2) does not meet the target condition, determine (x2, y2) as (x1, y1) and return to execute step S1 until (x2, y2) meets the target condition; wherein step S1 includes: when the difference between x1 and x0 is greater than or equal to the first difference threshold, and y1 and When the absolute value of the difference between x1 and y0 is less than the second difference threshold, the red light source is used as the target light source, and the difference between x1 and x0 is used as the target difference, and the adjustment is made according to the first adjustment strategy; when the difference between x0 and x1 is greater than or equal to the first difference threshold, and the absolute value of the difference between y1 and y0 is less than the second difference threshold, the red light source is used as the target light source, and the difference between x0 and x1 is used as the target difference, and the adjustment is made according to the second adjustment strategy; when the difference between y1 and y0 is greater than or equal to the second difference threshold, and the absolute value of the difference between x1 and x0 is less than the first difference threshold, the green light source is used as the target light source, and the difference between y1 and y0 is used as the target difference, and the adjustment is made according to the first adjustment strategy; When the difference between x1 and x0 is greater than or equal to the second difference threshold, and the absolute value of the difference between x1 and x0 is less than the first difference threshold, the green light source is taken as the target light source, and the difference between y0 and y1 is taken as the target difference, and adjusted according to the second adjustment strategy; when the difference between x1 and x0 is greater than or equal to the first difference threshold, and the difference between y1 and y0 is greater than or equal to the second difference threshold, the blue light source is taken as the target light source, and the smaller of the difference between x1 and x0 and the difference between y0 and y1 is taken as the target difference, and adjusted according to the second adjustment strategy; when the difference between x0 and x1 is greater than or equal to the first difference threshold, and the difference between y0 and y1 is greater than or equal to the second difference threshold, the blue light source is taken as the target light source, and the difference between x1 and x0 and the difference between y0 and y1 is taken as the target difference. The smaller of the difference between x0 and the difference between y0 and y1 is taken as the target difference, and adjusted according to the first adjustment strategy; the white field color coordinates (x2, y2) of the projection device are obtained; it is determined whether (x2, y2) meets the target condition, and the target condition is that the absolute value of the difference between x2 and x0 is less than the first difference threshold, and the absolute value of the difference between y2 and y0 is less than the second difference threshold; wherein the first adjustment strategy is used to indicate that the duration of the target light source emitting light alone is reduced by the target duration, and the duration of the other light sources among the multiple light sources except the target light source emitting light alone is adaptively adjusted; the second adjustment strategy is used to indicate that the duration of the target light source emitting light alone is increased by the target duration, and the duration of the other light sources among the multiple light sources except the target light source emitting light alone is adaptively adjusted.

[0121] In some embodiments of the present application, when the target difference falls within the first range, the target duration is the first duration; when the target difference falls within the second range, the target duration is the second duration, any value in the first range is greater than any value in the second range, and the first duration is greater than the second duration.

[0122] In some embodiments of the present application, the first adjustment strategy is specifically used to indicate that the duration of the target light source emitting light alone is reduced by a target duration, and the duration of the other light sources among the multiple light sources except the target light source emitting light alone is increased by half of the target duration; the second adjustment strategy is specifically used to indicate that the duration of the target light source emitting light alone is increased by a target duration, and the duration of the other light sources among the multiple light sources except the target light source emitting light alone is reduced by half of the target duration.

[0123] It should be noted that the above-mentioned white balance adjustment device can be the electronic device in the above-mentioned method embodiment of the present application, or it can be a functional module and / or functional entity in the electronic device that can realize the function of the device embodiment, and the embodiment of the present application is not limited.

[0124] In the embodiment of the present application, each module can implement the white balance adjustment method provided in the above method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0125] The beneficial effects of various implementations in this embodiment can be specifically referred to the beneficial effects of the corresponding implementations in the above-mentioned white balance adjustment method embodiment, and will not be described again here to avoid repetition.

[0126] An embodiment of the present application also provides a projection device, which may include: a processor, a memory, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, each process of the white balance adjustment method provided in the above method embodiment can be implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0127] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the above-mentioned white balance adjustment method are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0128] The computer readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0129] The present invention provides a computer program product, comprising: when the computer program product is run on a computer, the computer is enabled to implement the above-mentioned white balance adjustment method.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0131] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A white balance adjustment method, characterized in that: include: Obtaining standard white field color coordinates in a target color mixing mode of the projection device, wherein the white light in the target color mixing mode is: a plurality of primary color lights generated by a plurality of light sources emitting light in sequence according to corresponding light emission durations in one light emission cycle and a target mixed color light generated by at least two light sources emitting light at the same time according to preset light emission durations, each light source generating one primary color light, and the plurality of light sources including the at least two light sources; Acquire parameter information of the multiple light sources of the projection device, the parameter information including: initial light emission duration of each light source individually emitting light in a light emission cycle; Based on the standard white field color coordinates and the parameter information, a target light emission duration of each light source individually emitting light within the one light emission cycle is determined by a preset strategy, and the sum of the target light emission durations corresponding to the multiple light sources is equal to the sum of the initial light emission durations corresponding to the multiple light sources; Based on the preset driving sequence corresponding to the multiple light sources, each light source is driven in turn to emit light individually according to the corresponding target light emission duration within a light emission cycle, and the at least two light sources are driven to emit light simultaneously according to the preset light emission duration, so that the deviation between the white field color coordinates of the projection device and the standard white field color coordinates is within the allowable deviation range.

2. The method according to claim 1, characterized in that The parameter information also includes: the preset light emission duration, the initial illuminance and color coordinates of each primary color light, the multiple primary color lights include: the first primary color light corresponding to the first light source, the second primary color light corresponding to the second light source and the third primary color light corresponding to the third light source, and the target mixed color light includes the first primary color light and the second primary color light; The step of determining the target luminous duration of each light source emitting light individually within the luminous cycle by a preset strategy based on the standard white field color coordinates and the parameter information includes: Determining the unit illuminance of each primary color light based on the ratio of the initial illuminance of each primary color light to the initial light emission duration; Determine a first illuminance of the first primary color light based on the product of the unit illuminance of the first primary color light and the preset light emission duration, and determine a second illuminance of the second primary color light based on the product of the unit illuminance of the second primary color light and the preset light emission duration; determining a sum of an initial illuminance of the first primary color light and the first illuminance as a target illuminance of the first primary color light; determining the sum of the initial illuminance of the second primary color light and the second illuminance as the target illuminance of the second primary color light; Based on the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, the standard white field color coordinates and the color coordinates of each primary color light, the target luminous duration of each light source emitting light individually within the one luminous cycle is determined by a preset strategy.

3. The method according to claim 2, characterized in that The preset strategy is a target formula; The target formula is: Wherein, x is the abscissa of the standard white field color coordinate, y is the ordinate of the standard white field color coordinate, D r is the target luminous duration of the first light source, D b is the target luminous duration of the second light source, D g is the target luminous duration of the third light source, D i is the preset luminous duration of the target mixed color light, x r is the abscissa of the color coordinates of the first primary color light, T is the duration of a lighting cycle, x g is the abscissa of the color coordinate of the second primary color light, x b is the abscissa of the color coordinate of the third primary color light, y r is the ordinate of the color coordinate of the first primary color light, y g is the ordinate of the color coordinate of the second primary color light, y b is the ordinate of the color coordinate of the third primary color light, C r =Y r / y r , C g =Y g / y g , C b =Y b / y b , Y r is the target illuminance of the first primary color light, Y g is the target illuminance of the second primary color light, Y b is the initial illuminance of the third primary color light.

4. The method according to claim 2, characterized in that: The preset strategy is a plurality of preset corresponding relationships corresponding to the standard white field color coordinates, each preset corresponding relationship being used to indicate: a corresponding relationship between an illumination range of the first primary color light, an illumination range of the second primary color light, an illumination range of the third primary color light, a color coordinate range of the first primary color light, a color coordinate range of the second primary color light, a color coordinate range of the third primary color light and a duration of light emission of each light source alone; The target luminous duration of each light source emitting light individually within the one luminous cycle is determined by a preset strategy based on the target luminous intensity of the first primary color light, the target luminous intensity of the second primary color light, the initial luminous intensity of the third primary color light, the standard white field color coordinates, and the color coordinates of each primary color light, including: Determine, from a plurality of preset corresponding relationships corresponding to the standard white field color coordinates, a target corresponding relationship matching the target illuminance of the first primary color light, the target illuminance of the second primary color light, the initial illuminance of the third primary color light, and the color coordinates of each primary color light; Determine the duration of each light source emitting light individually in the target corresponding relationship as the corresponding target emitting light duration.

5. The method according to claim 1, characterized in that The parameter information also includes: initial white field color coordinates (x1, y1); the standard white field color coordinates are (x0, y0); the multiple light sources include: a red light source, a green light source and a blue light source; based on the standard white field color coordinates and the parameter information, determining the target light emission duration of each light source individually emitting light within the one light emission cycle by a preset strategy, including: Execute step S1, and when (x2, y2) satisfies the target condition, determine that the duration of each light source corresponding to (x2, y2) emitting light individually is the target emitting light duration; If (x2, y2) does not satisfy the target condition, (x2, y2) is determined to be (x1, y1) and the process returns to step S1 until (x2, y2) satisfies the target condition; Wherein, the step S1 comprises: When the difference between x1 and x0 is greater than or equal to the first difference threshold, and the absolute value of the difference between y1 and y0 is less than the second difference threshold, the red light source is used as the target light source, and the difference between x1 and x0 is used as the target difference, and adjustment is performed according to the first adjustment strategy; When the difference between x0 and x1 is greater than or equal to the first difference threshold, and the absolute value of the difference between y1 and y0 is less than the second difference threshold, the red light source is used as the target light source, and the difference between x0 and x1 is used as the target difference, and adjustment is performed according to the second adjustment strategy; When the difference between y1 and y0 is greater than or equal to the second difference threshold, and the absolute value of the difference between x1 and x0 is less than the first difference threshold, the green light source is used as the target light source, and the difference between y1 and y0 is used as the target difference, and adjustment is performed according to the first adjustment strategy; When the difference between y0 and y1 is greater than or equal to the second difference threshold, and the absolute value of the difference between x1 and x0 is less than the first difference threshold, the green light source is used as the target light source, and the difference between y0 and y1 is used as the target difference, and adjustment is performed according to the second adjustment strategy; When the difference between x1 and x0 is greater than or equal to the first difference threshold, and the difference between y1 and y0 is greater than or equal to the second difference threshold, the blue light source is used as the target light source, and the smaller of the difference between x1 and x0 and the difference between y0 and y1 is used as the target difference, and adjustment is performed according to the second adjustment strategy; When the difference between x0 and x1 is greater than or equal to the first difference threshold, and the difference between y0 and y1 is greater than or equal to the second difference threshold, the blue light source is used as the target light source, and the smaller of the difference between x1 and x0 and the difference between y0 and y1 is used as the target difference, and adjustment is performed according to the first adjustment strategy; Obtaining the white field color coordinates (x2, y2) of the projection device; Determine whether (x2, y2) satisfies a target condition, wherein the target condition is that the absolute value of the difference between x2 and x0 is less than the first difference threshold, and the absolute value of the difference between y2 and y0 is less than the second difference threshold; Among them, the first adjustment strategy is used to indicate that the duration of the target light source emitting light alone is reduced by the target duration, and adaptively adjust the duration of the other light sources among the multiple light sources except the target light source emitting light alone; the second adjustment strategy is used to indicate that the duration of the target light source emitting light alone is increased by the target duration, and adaptively adjust the duration of the other light sources among the multiple light sources except the target light source emitting light alone.

6. The method according to claim 5, characterized in that When the target difference value belongs to the first range, the target duration is the first duration; When the target difference belongs to the second range, the target duration is the second duration, any value in the first range is greater than any value in the second range, and the first duration is greater than the second duration.

7. The method according to claim 5 or 6, characterized in that: The first adjustment strategy is specifically used to instruct that the duration of the target light source's single illumination is reduced by the target duration, and the duration of the other light sources among the multiple light sources except the target light source's single illumination is increased by half of the target duration; the second adjustment strategy is specifically used to instruct that the duration of the target light source's single illumination is increased by the target duration, and the duration of the other light sources among the multiple light sources except the target light source's single illumination is reduced by half of the target duration.

8. A white balance adjustment device, characterized in that: include: An acquisition module is used to acquire the standard white field color coordinates under the target color mixing mode in which the projection device is located, wherein the white light under the target color mixing mode is: a plurality of primary color lights generated by a plurality of light sources emitting light in sequence according to corresponding light emission durations in one light emission cycle and a target mixed color light generated by at least two light sources emitting light at the same time according to preset light emission durations, each light source generating a primary color light, and the plurality of light sources including the at least two light sources; The acquisition module is further used to acquire parameter information of the multiple light sources of the projection device, wherein the parameter information includes: an initial light emission duration of each light source individually emitting light in a light emission cycle; A determination module, configured to determine, based on the standard white field color coordinates and the parameter information, a target light emission duration for each light source to emit light individually within the one light emission cycle by a preset strategy, wherein the sum of the target light emission durations corresponding to the multiple light sources is equal to the sum of the initial light emission durations corresponding to the multiple light sources; A driving module is used to drive each light source in turn to emit light individually according to the corresponding target light emission duration within a light emission cycle based on a preset driving sequence corresponding to the multiple light sources, and to drive the at least two light sources to emit light simultaneously according to the preset light emission duration, so that the deviation between the white field color coordinates of the projection device and the standard white field color coordinates is within an allowable deviation range.

9. A projection device, characterized in that: include: A memory and a processor, the memory is used to store computer programs; The processor is used to execute the white balance adjustment method described in any one of claims 1 to 7 when calling the computer program.

10. A computer-readable storage medium, characterized in that: include: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the white balance adjustment method described in any one of 1-7 is implemented.

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