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

Abstract

The invention relates to a white balance adjustment method and device, laser projection equipment and a storage medium, and is applied to the technical field of laser projection, and the method comprises the steps: collecting a first color coordinate value of ambient light; a primary color light source is driven to emit primary color light, a second color coordinate value of mixed light is collected, and the mixed light refers to light generated by mixing the ambient light and the primary color light; based on the first color coordinate value and the second color coordinate value, the corresponding relation between the color coordinate value under the mixed light and the color coordinate value under the ambient light is determined, and the corresponding relation represents the influence of the ambient light on the color coordinate value; and on the basis of the corresponding relation, under the condition that the deviation between the second color coordinate value and the standard color coordinate value is larger than a deviation threshold value, the second color coordinate value is adjusted until the deviation between the adjusted second color coordinate value and the standard color coordinate value is smaller than or equal to the deviation threshold value. According to the embodiment of the invention, the white balance indexes under different ambient light conditions can be ensured to be the same.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of laser projection. More specifically, the present application relates to a white balance adjustment method, apparatus, laser projection device, and storage medium. Background Art

[0002] White balance is an important indicator for measuring the performance of a laser projection device. However, the white balance of a laser projection device is easily affected by factors such as the light source, optical path, and light efficiency, resulting in color cast when displaying a picture and causing white balance imbalance. Currently, before leaving the factory, a laser projection device will adjust the duty cycle of the laser through a preset program in a fixed test environment to achieve white balance correction, so as to ensure that the white balance difference between devices is small. After the laser projection device is delivered to the user, the user's usage scenario may be different from the previous test environment in terms of brightness, color temperature, etc. In addition, the long-term use of the laser projection device will also cause inconsistent attenuation ratios of the lasers. If the white balance is still adjusted according to the preset program, the white color displayed by the laser projection device will be deviated, seriously affecting the user experience. Therefore, how to ensure the same white balance index under different ambient light conditions is an urgent problem to be solved in the art. Summary of the Invention

[0003] To solve the above technical problems or at least partially solve the above technical problems, the present application provides a white balance adjustment method, apparatus, laser projection device, and storage medium, which can ensure the same white balance index under different ambient light conditions.

[0004] In a first aspect, an embodiment of the present application provides a white balance adjustment method, including:

[0005] Collecting a first chromaticity coordinate value of ambient light;

[0006] Driving a primary color light source to emit primary color light, and collecting a second chromaticity coordinate value of the mixed light, where the mixed light refers to the light formed by the combined action of the ambient light and the primary color light;

[0007] Based on the first chromaticity coordinate value and the second chromaticity coordinate value, determining a correspondence relationship between the chromaticity coordinate value under the mixed light and the chromaticity coordinate value under the ambient light, where the correspondence relationship represents the influence of the ambient light on the chromaticity coordinate value;

[0008] Based on the correspondence relationship, when the deviation between the second chromaticity coordinate value and the standard chromaticity coordinate value is greater than a deviation threshold, adjusting the second chromaticity coordinate value until the deviation between the adjusted second chromaticity coordinate value and the standard chromaticity coordinate value is less than or equal to the deviation threshold.

[0009] As an alternative implementation manner of the embodiment of the present application, based on the corresponding relationship, when the deviation between the second color coordinate value and the standard color coordinate value is greater than the deviation threshold, the second color coordinate value is adjusted until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold, including: when the deviation is greater than the deviation threshold, calculating a target parameter according to the standard color coordinate value; adjusting the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

[0010] As an alternative implementation manner of the embodiment of the present application, the primary color light sources include: a first light source, a second light source, and a third light source; the primary color lights include: a first primary color light corresponding to the first light source, a second primary color light corresponding to the second light source, a third primary color light corresponding to the third light source, and white light corresponding to the combination of all primary color light sources;

[0011] Driving the primary color light sources to emit primary color lights and collecting the second color coordinate value of the mixed light includes: driving the primary color light sources to emit primary color lights in a preset order; the preset order is the first primary color light, the second primary color light, the third primary color light, and white light; correspondingly collecting the color coordinate values of the respective primary color lights, the color coordinate value of the first primary color light, the color coordinate value of the second primary color light, the color coordinate value of the third primary color light, and the color coordinate value of white light.

[0012] As an alternative implementation manner of the embodiment of the present application, the target parameter includes the target emission duration of the primary color light source and / or the target illuminance of the primary color light;

[0013] When the deviation is greater than the deviation threshold, calculating the target parameter according to the standard color coordinate value includes: when the deviation is greater than the deviation threshold, calculating the target parameter according to the standard color coordinate value based on a preset formula;

[0014] Wherein, the preset formula is:

[0015]

[0016] In the preset formula, x is the abscissa of the standard color coordinate value, y is the ordinate of the standard color coordinate value, D r is the target emission duration of the first light source, D b is the target emission duration of the second light source, D g is the target emission duration of the third light source, x r is the abscissa of the color coordinate value of the first primary color light, x g is the abscissa of the color coordinate value of the second primary color light, x b is the abscissa of the color coordinate value of the third primary color light, y r is the ordinate of the color coordinate value of the first primary color light, y g is the ordinate of the color coordinate value of the second primary color light, yb is the ordinate of the color coordinate value 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 target illuminance of the third primary color light.

[0017] As an alternative implementation manner of an embodiment of the present application, adjusting the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold includes: adjusting the initial emission duration of the primary color light source to the target emission duration, and / or adjusting the initial illuminance of the primary color light to the target illuminance to adjust the second color coordinate value until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

[0018] As an alternative implementation manner of an embodiment of the present application, after adjusting the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold, the method further includes: storing the first color coordinate value corresponding to the target parameter; and when the color coordinate value of the ambient light re-collected is the first color coordinate value, adjusting the color coordinate value under the ambient light according to the target parameter.

[0019] In a second aspect, the present application provides a white balance adjustment device, and the device includes:

[0020] An acquisition module, configured to acquire the first color coordinate value of the ambient light; drive the primary color light source to emit the primary color light, and acquire the second color coordinate value of the mixed light, where the mixed light refers to the light formed by the mixing of the ambient light and the primary color light;

[0021] A determination module, configured to determine the correspondence between the color coordinate value under the mixed light and the color coordinate value under the ambient light based on the first color coordinate value and the second color coordinate value, where the correspondence characterizes the influence of the ambient light on the color coordinate value;

[0022] An adjustment module, configured to adjust the second color coordinate value based on the correspondence when the deviation between the second color coordinate value and the standard color coordinate value is greater than the deviation threshold until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

[0023] As an alternative implementation of the embodiment of the present application, the adjustment module is specifically configured to: when the deviation is greater than the deviation threshold, calculate a target parameter according to the standard color coordinate value; adjust the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

[0024] As an alternative implementation of the embodiment of the present application, the primary color light sources include: a first light source, a second light source, and a third light source; the primary color lights include: a first primary color light corresponding to the first light source, a second primary color light corresponding to the second light source, a third primary color light corresponding to the third light source, and white light corresponding to the combination of all primary color light sources;

[0025] During the process of driving the primary color light sources to emit primary color lights and collecting the second color coordinate values of the mixed light, the collection module is specifically configured to: drive the primary color light sources to emit primary color lights in a preset order; the preset order is the first primary color light, the second primary color light, the third primary color light, and white light; correspondingly collect the primary color coordinate values of each primary color light, the color coordinate value of the first primary color light, the color coordinate value of the second primary color light, the color coordinate value of the third primary color light, and the color coordinate value of white light.

[0026] As an alternative implementation of the embodiment of the present application, the target parameter includes the target emission duration of the primary color light source and / or the target illuminance of the primary color light;

[0027] When calculating the target parameter according to the standard color coordinate value when the deviation is greater than the deviation threshold, the adjustment module is specifically configured to: when the deviation is greater than the deviation threshold, calculate the target parameter according to the standard color coordinate value based on a preset formula;

[0028] Wherein, the preset formula is:

[0029]

[0030] In the preset formula, x is the abscissa of the standard color coordinate value, y is the ordinate of the standard color coordinate value, D r is the target emission duration of the first light source, D b is the target emission duration of the second light source, D g is the target emission duration of the third light source, x r is the abscissa of the color coordinate value of the first primary color light, x g is the abscissa of the color coordinate value of the second primary color light, x b is the abscissa of the color coordinate value of the third primary color light, y r is the ordinate of the color coordinate value of the first primary color light, y g is the ordinate of the color coordinate value of the second primary color light, y b is the ordinate of the color coordinate value of the third primary color light, C r = Yr / 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, and Y g is the target illuminance of the second primary color light, and Y b is the target illuminance of the third primary color light.

[0031] As an optional implementation manner of the embodiment of the present application, during the process of adjusting the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold, the adjustment module is specifically configured to: adjust the initial emission duration of the primary color light source to the target emission duration, and / or adjust the initial illuminance of the primary color light to the target illuminance, so as to adjust the second color coordinate value until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

[0032] As an optional implementation manner of the embodiment of the present application, after adjusting the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold, the adjustment module is further configured to: store the first color coordinate value corresponding to the target parameter; and when the color coordinate value of the ambient light re-acquired is the first color coordinate value, adjust the color coordinate value under the ambient light according to the target parameter.

[0033] In a third aspect, the present application provides a laser projection device, including: a memory and a processor, the memory is used to store a computer program; the processor is used to execute the white balance adjustment method as in the first aspect when calling the computer program.

[0034] 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 as in the first aspect is implemented.

[0035] In a fifth aspect, the present application provides a computer program product, including: when the computer program product runs on a computer, the computer is enabled to implement the white balance adjustment method as in the first aspect.

[0036] The technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art: In the embodiments of the present application, first, the first chromaticity coordinate value of the ambient light is collected, then the primary color light source is driven to emit primary color light, and the second chromaticity coordinate value of the mixed light is collected. The mixed light is the light formed by the combined action of the ambient light and the primary color light. Furthermore, based on the collected first chromaticity coordinate value and the second chromaticity coordinate value, the correspondence relationship between the chromaticity coordinate value under the mixed light and the chromaticity coordinate value under the ambient light is determined to analyze the influence of the ambient light on the chromaticity coordinate value. Further, based on this correspondence relationship, when the deviation between the second chromaticity coordinate value and the standard chromaticity coordinate value is greater than the deviation threshold, the second chromaticity coordinate value is adjusted until the deviation between the adjusted second chromaticity coordinate value and the standard chromaticity coordinate value is less than or equal to the deviation threshold. In this way, the influence of the ambient light on the chromaticity coordinate value is analyzed to adjust the second chromaticity coordinate value of the mixed light to make it close to the standard chromaticity coordinate value, thereby unifying the white balance index under different ambient light conditions. Description of the Drawings

[0037] To more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a schematic diagram of a scenario in some embodiments provided by the embodiments of the present application;

[0039] Figure 2 It is a schematic diagram of a fluorescence wheel structure provided by the embodiments of the present application;

[0040] Figure 3 It is a schematic diagram of a color gamut plane provided by the embodiments of the present application;

[0041] Figure 4 It is a schematic flowchart of a white balance adjustment method provided by the embodiments of the present application;

[0042] Figure 5 It is a schematic diagram of the optical path architecture of a laser projection device provided by the embodiments of the present application;

[0043] Figure 6 It is a schematic diagram of chromaticity coordinate values in the embodiments of the present application;

[0044] Figure 7 It is a schematic diagram of the influence of ambient light on chromaticity coordinate values provided by the embodiments of the present application;

[0045] Figure 8 It is a schematic diagram of the structure of a white balance device provided by the present application;

[0046] Figure 9Schematic structural diagram of the laser projection device provided by the embodiment of the present application;

[0047] Figure 10 Hardware configuration block diagram of the laser projection device provided by the embodiment of the present application;

[0048] Figure 11 Software configuration schematic diagram of the laser projection device provided by the embodiment of the present application. Detailed implementation manners

[0049] To make the objectives and implementation manners of the present application clearer, the following will clearly and completely describe the exemplary implementation manners of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0050] It should be noted that the brief descriptions of the terms in the present application are only for facilitating the understanding of the following described implementation manners, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and general meanings.

[0051] The terms "first", "second", "third", etc. in the description, claims and the above-mentioned drawings of the present application are used to distinguish similar or like objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that such terms can be interchanged under appropriate circumstances.

[0052] The terms "comprising" and "having" and any variations thereof are intended to cover but not exclude inclusion. For example, a product or device comprising a series of components does not necessarily have to be limited to all the components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0053] The laser projection device provided by the implementation manner of the present application can have various implementation forms. For example, a laser projector, a laser TV, etc.

[0054] As Figure 1 shown, Figure 1 Scene schematic diagram in some embodiments provided by the embodiment of the present application. As Figure 1 shown, it includes a control device 100, a laser projection device 200, a smart device 300 and a server 400. The user can operate the laser projection device 200 through the smart device 300 or the control device 100 to play audio-visual resources on the laser projection device 200.

[0055] Refer to Figure 1As shown, the laser projection device 200 has been delivered to the user. When adjusting the white balance of the laser projection device 200 in the user's usage scenario, first, the first color coordinate value of the ambient light in the user's scenario is collected. Then, the primary color light sources are driven to emit primary color light. At this time, both the ambient light and the primary color light exist in the user's scenario, and the ambient light and the primary color light will jointly affect the display of the laser projection device 200. Thus, the second color coordinate value of the mixed light is collected. According to the collected first color coordinate value of the ambient light and the second color coordinate value of the mixed light, the corresponding relationship between the color coordinate value under the mixed light and the color coordinate value under the ambient light is determined, thereby quantifying the influence of the ambient light on the color coordinate value. Further, based on the corresponding relationship between the color coordinate value under the mixed light and the color coordinate value under the ambient light, it is compared whether the deviation between the second color coordinate value and the marked color coordinate value is greater than the deviation threshold, where the standard color coordinate value is the color coordinate value in the test environment; if so, it means that due to the influence of the ambient light, the white balance index of the user's usage scenario is inconsistent with the white balance index in the test environment, then the second color coordinate value is adjusted until the deviation between the second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold, realizing the unification of the white balance index under different ambient light conditions, making the display screen of the laser projection device 200 free of color cast, thereby enhancing the user's usage experience.

[0056] In some embodiments, Figure 1 the control device 100 can be a remote control. The communication between the remote control and the laser projection device 200 includes infrared protocol communication, Bluetooth protocol communication, wireless or other wired methods to control the laser projection device 200. The user can input user instructions through the buttons on the remote control, voice input, control panel input, etc. to control the laser projection device 200. In some embodiments, the control device 100 can also use a mobile terminal, a tablet computer, a computer, a laptop computer, and other intelligent devices to control the laser projection device 200.

[0057] In some embodiments, Figure 1 the intelligent device 300 can install software applications with the laser projection device 200 and achieve connection communication through network communication protocols to achieve the purpose of one-to-one control operation and data communication. It can also transmit the audio and video content displayed on the intelligent device 300 to the laser projection device 200 to achieve the synchronous display function. The laser projection device 200 also conducts data communication with the server 400 through various communication methods. The laser projection device 200 is allowed to communicate and connect through a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 400 can provide various contents and interactions to the laser projection device 200. In addition to providing the function of receiving broadcast television, the laser projection device 200 can also additionally provide the function of an intelligent network television with computer support functions.

[0058] Exemplarily, as Figure 2 shown,Figure 2 The figure is a schematic diagram of a fluorescent wheel structure provided by an embodiment of the present application, which is applied to a laser projection device. Taking a blue laser as an example of the laser, in the annular region around the fluorescent wheel, the R region is a red phosphor region, the G region is a green phosphor region, and the B region is a blue laser transmission region. In one rotation period, the angles occupied by each region are different. When the laser irradiates the fluorescent wheel, the durations of the generated primary color lights are different. Due to the persistence of vision of the human eye, the continuously output primary color lights, blue light, green light, and yellow light, are perceived by the human eye as the mixed white light.

[0059] As Figure 3 shown, Figure 3 The figure is a schematic diagram of a color gamut plane provided by an embodiment of the present application. The three regions within the horseshoe shape are red, green, and blue respectively. Among them, the green range is located in the upper left region of the horseshoe diagram. The closer to the edge of this region, the purer the green color. Similarly, the blue is located in the lower left region. The closer to the lower left region, the purer the blue color. The red is located in the lower right region. The closer to the lower right region, the purer the red color. When the white balance color coordinates shift in this color gamut diagram, the direction of the shift towards which part of the region will cause the white color to tend towards that color. The black circular region within the horseshoe shape is the range of the white balance color coordinates. If it exceeds this range, the white color will be color-biased (white balance imbalance). If the x coordinate is too large, the white color will be pinkish or yellowish. If the x is too small, the white color will be bluish. If the y is too large, the white color will be greenish. If the y is too small, the white color will be pinkish or purplish.

[0060] Based on the above description, an embodiment of the present application provides a white balance adjustment method. To illustrate this solution in more detail, the following will be described in an exemplary manner in combination with Figure 4 It can be understood that Figure 4 the steps involved in

[0061] As Figure 4 shown, Figure 4 The figure is a schematic flow chart of the white balance adjustment method provided by an embodiment of the present application. The method includes the following steps S401 to S404:

[0062] S401. Collect the first color coordinate value of the ambient light.

[0063] In an embodiment of the present application, an illuminance meter (color sensor) is added to the laser projection device. It is an optical sensor that can collect the luminance value and color coordinate value emitted by the primary color light source, and / or the luminance and color coordinate value of the ambient light.

[0064] Exemplarily, an illuminometer is set at the light-transmitting position in the optical engine unit to collect the luminance value and color coordinate value emitted by the primary color light source, and another illuminometer is set at the light-transmitting position of the upper shell of the laser projection device to collect the luminance and color coordinate value of the ambient light. Alternatively, an illuminometer that can collect both the luminance value and color coordinate value emitted by the primary color light source and the luminance and color coordinate value of the ambient light is set.

[0065] As Figure 5 shown, Figure 5 is a schematic diagram of the optical path architecture of the laser projection device provided by the embodiment of the present application. Figure 5 It includes: a red laser light source 501, a green laser light source 502, a blue laser light source 503, a first dichroic mirror 504, a reflector 505, a second dichroic mirror 506, a lens 507, a diffuser wheel 508, an optical duct 509, a total reflection prism 510, a first galvanometer 511, a second galvanometer 512, a projection lens 513, and an illuminometer 514. Among them, the first dichroic mirror 504 can transmit red laser light and reflect green and blue laser light; the reflector 505 can reflect green laser light and change the optical path of green laser light; the second dichroic mirror 506 can reflect green laser light and transmit blue laser light; after the red laser light, green laser light, and blue laser light are combined, they enter the diffuser wheel 508, and after being homogenized by the optical duct 509, the homogenized light irradiates the total reflection prism 510, and after passing through the total reflection prism 510, it enters the first galvanometer 511, and then the second galvanometer 512 shifts the light pixel information, and finally projects it into the projection lens 513 to project an image.

[0066] Among them, the illuminometer 514 can detect the intensity and coordinates of the wavelength optical signals of the red light source, green light source, and blue light source. Exemplarily, Figure 6 is a schematic diagram of the color coordinate value in the embodiment of the present application. As Figure 6 shown, the spectral peak power of the blue light source, the spectral peak power of the green light source, and the spectral peak power of the red light source are shown in the figure.

[0067] In some embodiments, after the laser projection device is powered on and turned on, step 401 is executed with the primary color light source turned off to collect the first color coordinate value of the ambient light, and the first color coordinate value can be denoted as A. It can be understood that after the laser projection device is powered on and turned on, it first enters the off-screen mode and the laser is turned off. At this time, the first color coordinate value of the ambient light is collected. It should be noted that since the illuminometer can collect the color coordinate value and optical signal intensity (i.e., luminance value) of the primary color light source, the present application can use or combine the collected luminance value to analyze the influence of the ambient light in the subsequent process.

[0068] In the above embodiments, a first color coordinate value of ambient light is collected by an illuminometer in a laser projection display device to obtain a kind of original data for subsequent analysis.

[0069] S402. Drive the primary color light sources to emit primary color light, and collect a second color coordinate value of the mixed light.

[0070] Among them, the mixed light refers to the light jointly formed by the ambient light and the primary color light. It can be understood that after driving the primary color light sources to emit primary color light, there is ambient light in the original scene. When the primary color light sources are driven to emit primary color light, at this time, there is both ambient light and primary color light in the scene. The ambient light and the primary color light will act together to affect the display of the laser projection device.

[0071] In some embodiments, after performing step 401 to collect the first color coordinate value of the ambient light, exit the screen-off mode, turn on the primary color light sources, drive the primary color light sources to emit primary color light, and collect the second color coordinate value under the ambient light and the primary color light, denoted as B.

[0072] In some embodiments, the primary color light sources include: a first primary color light source, a second primary color light source, and a third primary color light source. Correspondingly, the primary color light includes the first primary color light corresponding to the first primary color light source, the second primary color light corresponding to the second primary color light source, the third primary color light corresponding to the third primary color light source, and also includes the white light corresponding to the combination of the primary color light sources. 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 r and the proportion of green light in white light is g, then the proportion of blue light in white light is (1 - r - g).

[0073] Exemplarily, the primary color light sources include: a red light source, a green light source, and a blue light source, and the primary color light includes red light, green light, blue light, and white light. It can be understood that driving the primary color light sources to emit primary color light is for the laser projection device to project primary color color cards, such as a red color card, a green color card, a blue color card, and a white color card.

[0074] In some embodiments, drive the primary color light sources to emit primary color light in a preset order, and collect the second color coordinate value of the mixed light. Among them, the preset order is the first primary color light, the second primary color light, the third primary color light, and the white light, which means first emit the first primary color light, then emit the second primary color light, then emit the third primary color light, and finally emit the white light. Then, after performing step 402, first drive the first primary color light source to emit the first primary color light, and collect the second color coordinate value B1 under the first primary color light and the ambient light. Then drive the second primary color light source to emit the second primary color light, and collect the second color coordinate value B2 under the second primary color light and the ambient light. Then drive the third primary color light source to emit the third primary color light, and collect the second color coordinate value B3 under the third primary color light and the ambient light. Then drive the primary color light sources to emit white light, and collect the second color coordinate value B4 under the white light and the ambient light.

[0075] In the above embodiments, considering that the ambient light in the user usage scenario is different from that in the test scenario, the second chromaticity coordinate value when the ambient light and the primary color light act in combination in the current environment is collected, so as to analyze the influence of the ambient light on the chromaticity coordinate value in combination with the first chromaticity coordinate value of the ambient light collected in step S401. It is applicable to the test and debugging process and also applicable to the user usage scenario.

[0076] In some embodiments, the illuminance meter collects the second luminance value of the mixed light, which can also be used to analyze the influence of the ambient light in the subsequent process.

[0077] 403. Based on the first chromaticity coordinate value and the second chromaticity coordinate value, determine the correspondence between the chromaticity coordinate value under the mixed light and the coordinate value under the ambient light.

[0078] Among them, the correspondence characterizes the influence of the ambient light on the chromaticity coordinate value, which is a non-linear relationship supported by test data.

[0079] As Figure 7 shown, Figure 7 is a schematic diagram of the influence of the ambient light on the chromaticity coordinate value provided by the embodiment of the present application. The chromaticity coordinate values corresponding to different test conditions are shown in the figure. The first test condition is that the ambient light is turned off, and the laser projection device projects the primary color chart and the white chart respectively; the second test condition is that the laser is turned off and only the ambient light is present; the third test condition is that the ambient light is turned on, and the laser projection device projects the primary color chart and the white chart respectively. The second test condition is used as a control group. By controlling the variable of the ambient light, it is analyzed that the chromaticity coordinate value will be affected by the ambient light. Exemplarily, if the ambient light is yellow light, when the ambient light is turned on compared to when it is turned off: the abscissa of the white chromaticity coordinate value is larger, the ordinate of the white chromaticity coordinate value is larger, the abscissa of the primary color chromaticity coordinate value is smaller, and the ordinate of the primary color chromaticity coordinate value is larger. Based on Figure 7 the data shown, it shows that the ambient light has an influence on the chromaticity coordinate value. When the ambient light is turned on, the action of the ambient light and the projection light on the coordinate value is not a simple addition. It can be understood that the chromaticity coordinate value when the ambient light is turned on is not equal to the sum of the chromaticity coordinate value of only the ambient light and the chromaticity coordinate value of only the projection light.

[0080] In some embodiments, based on the first chromaticity coordinate value A and the second chromaticity coordinate value B, determine the correspondence B = f(A) between the chromaticity coordinate value under the mixed light and the chromaticity coordinate value under the ambient light. Optionally, B is the chromaticity coordinate value of each primary color and the white chromaticity coordinate value under the mixed light, or B is the chromaticity coordinate value of each primary color luminance and the chromaticity coordinate value and the white luminance and the chromaticity coordinate value under the mixed light; A is the chromaticity coordinate value under the ambient light, or the luminance and the chromaticity coordinate value under the ambient light.

[0081] In the above embodiments, through data analysis, the influence of ambient light on the color coordinate values is determined, and this influence is non-linear. Therefore, the white balance adjustment is not simply reducing the color coordinate values under ambient light, and step S404 needs to be executed.

[0082] S404. Based on the corresponding relationship, when the deviation between the second color coordinate value and the standard color coordinate value is greater than the deviation threshold, adjust the second color coordinate value until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

[0083] Among them, the standard color coordinate value is the white balance index of the laser projection device when it leaves the factory. It can be understood that the standard color coordinate values corresponding to different application scenarios are different. The standard color coordinate value corresponding to the target sales area can be determined according to the sales area of the laser projection device; the standard color coordinate value corresponding to the target model can also be determined according to the model of the laser projection device; it can also be the standard color coordinate value set by the user; it is specifically determined according to actual needs, and the embodiments of the present application do not make limitations. Exemplarily, different sales areas correspond to different standard color coordinate values. Europeans have blue eyes and are more sensitive to red stimuli. Therefore, for laser projection devices in the European sales area, the proportion of red in the set standard color coordinate value can be appropriately lower; relatively, for laser projection devices in the Asian sales area, the proportion of red in the set standard color coordinate value can be appropriately higher.

[0084] In some embodiments, based on the corresponding relationship, it is determined that ambient light has an impact on the color coordinate values under mixed light, and then it is compared whether the deviation between the second color coordinate value and the standard color coordinate value is greater than the deviation threshold. The deviation threshold is a preset threshold for characterizing white balance, and is usually set to 0 to determine whether the current coordinate value is consistent with the standard color coordinate value. It should be noted that users can feel the change in the color temperature of the display screen of the laser projection device, such as being warmer or colder in color. However, due to physiological limitations, for two color coordinate values that are very close, users cannot perceive the change in color temperature, and an error in white balance adjustment is allowed. Therefore, the specific value of the deviation threshold is not limited in the present application.

[0085] When the deviation between the second color coordinate value and the standard color coordinate value is greater than the deviation threshold, adjusting the second color coordinate value includes: when the deviation is greater than the deviation threshold, calculating a target parameter according to the standard color coordinate value; adjusting the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold. Among them, the second color coordinate value is related to the target parameter.

[0086] Based on the above embodiments, when the deviation is greater than the deviation threshold, calculating the target parameter according to the standard color coordinate value includes: when the deviation is greater than the deviation threshold, calculating the target parameter based on a preset formula according to the standard color coordinate value, where the target parameter includes the target emission duration of the primary color light source and / or the target illuminance of the primary color light.

[0087] The preset formula in the above embodiments is:

[0088]

[0089] where x is the abscissa of the standard color coordinate value, y is the ordinate of the standard color coordinate value, D r is the target emission duration of the first light source, D b is the target emission duration of the second light source, D g is the target emission duration of the third light source, x r is the abscissa of the color coordinate value of the first primary color light, x g is the abscissa of the color coordinate value of the second primary color light, x b is the abscissa of the color coordinate value of the third primary color light, y r is the ordinate of the color coordinate value of the first primary color light, y g is the ordinate of the color coordinate value of the second primary color light, y b is the ordinate of the color coordinate value 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 target illuminance of the third primary color light.

[0090] where,

[0091]

[0092]

[0093] D r + D g + D b = 100%

[0094] In the formula, X, Y, Z are coordinates in the color space; x, y, z are coordinates in the plane coordinate system.

[0095] According to Grassmann's color law, it is known that:

[0096] Y m = Y r + Y g + Y b = D r Y r + D g Y g + D b Y b

[0097] wherein, Y m is the luminous flux mixed by red light, green light and blue light. For Y r , Y g , Y b , the greater the current provided to each primary color light source, the greater the corresponding value.

[0098] Based on the above formula, the color coordinate values collected by the laser projection device are related to the emission duration of the primary color light source and the illuminance of the primary color light. Therefore, when the deviation between the second color coordinate value of the mixed light and the standard color coordinate value is greater than the deviation threshold in this application, by adjusting the target parameters, that is, the target emission duration of the primary color light source, and / or the target illuminance of the primary color light, to adjust the second color coordinate value until the deviation between the second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

[0099] It can be understood that each time an adjustment is completed, the second color coordinate value of the mixed light needs to be re-acquired to determine whether the adjusted second color coordinate value is less than or equal to the deviation threshold. Thus, when it is greater than the deviation threshold, the adjustment is repeated until the second color coordinate value of the mixed light is less than or equal to the deviation threshold, so that when the projection display screen is performed according to the adjusted color coordinate value, there is no color cast and the white balance effect is ensured.

[0100] In some embodiments, after adjusting the second color coordinate value to a deviation less than or equal to the deviation threshold from the standard color coordinate value, it includes: storing the first color coordinate value corresponding to the target parameters, so that when the color coordinate value of the ambient light is re-acquired as the first color coordinate value, the color coordinate value of the ambient light is adjusted according to the target parameters. It can be understood that storing the environmental conditions corresponding to the adjustment parameters, so that when the external environmental light conditions of the laser projection device are the same, that is, when the first color coordinate value is re-acquired, the target parameters are directly called for white balance adjustment, so that when the laser projection device projects in the current light environment and generates primary color light, the display screen has no color cast.

[0101] In summary, the embodiment of the present application provides a white balance adjustment method. The method first collects the first chromaticity coordinate value of the ambient light, then drives the primary color light source to emit primary color light, and collects the second chromaticity coordinate value of the mixed light. The mixed light is the light formed by the combined action of the ambient light and the primary color light. Furthermore, based on the collected first chromaticity coordinate value and the second chromaticity coordinate value, the correspondence relationship between the chromaticity coordinate value under the mixed light and the chromaticity coordinate value under the ambient light is determined to analyze the influence of the ambient light on the chromaticity coordinate value. Further, based on this correspondence relationship, when the deviation between the second chromaticity coordinate value and the standard chromaticity coordinate value is greater than the deviation threshold, the second chromaticity coordinate value is adjusted until the deviation between the adjusted second chromaticity coordinate value and the standard chromaticity coordinate value is less than or equal to the deviation threshold. In this way, the influence of the ambient light on the chromaticity coordinate value is analyzed to adjust the second chromaticity coordinate value of the mixed light to make it close to the standard chromaticity coordinate value, thereby unifying the white balance index under different ambient light conditions.

[0102] As Figure 8 shown, Figure 8 FIG. is a schematic structural diagram of a white balance device provided by the present application. The white balance adjustment device includes:

[0103] An acquisition module 801, configured to: collect the first chromaticity coordinate value of the ambient light; drive the primary color light source to emit primary color light, and collect the second chromaticity coordinate value of the mixed light, where the mixed light refers to the light formed by the combined action of the ambient light and the primary color light;

[0104] A determination module 802, configured to: based on the first chromaticity coordinate value and the second chromaticity coordinate value, determine the correspondence relationship between the chromaticity coordinate value under the mixed light and the chromaticity coordinate value under the ambient light, where the correspondence relationship characterizes the influence of the ambient light on the chromaticity coordinate value;

[0105] An adjustment module 803, configured to: based on the correspondence relationship, when the deviation between the second chromaticity coordinate value and the standard chromaticity coordinate value is greater than the deviation threshold, adjust the second chromaticity coordinate value until the deviation between the adjusted second chromaticity coordinate value and the standard chromaticity coordinate value is less than or equal to the deviation threshold.

[0106] The white balance device provided by the present application is applied to a laser projection device. The acquisition module 801 includes an illuminometer, and the illuminometer is used to collect the luminance value and the chromaticity coordinate value of the primary color light. In some embodiments, the illuminometer may be disposed at a light-transmitting position in the optical engine unit to collect the luminance value and the chromaticity coordinate value emitted by the primary color light source, and disposed at a light-transmitting position on the upper shell of the laser projection device to collect the luminance and the chromaticity coordinate value of the ambient light. Alternatively, an illuminometer that can collect both the luminance value and the chromaticity coordinate value emitted by the primary color light source and the luminance and the chromaticity coordinate value of the ambient light is provided.

[0107] In some embodiments, the adjustment module 803 is specifically configured to: when the deviation is greater than the deviation threshold, calculate a target parameter according to the standard color coordinate value; adjust the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

[0108] As an alternative implementation manner of the embodiment of the present application, the primary color light sources include: a first light source, a second light source, and a third light source; the primary color lights include: a first primary color light corresponding to the first light source, a second primary color light corresponding to the second light source, a third primary color light corresponding to the third light source, and white light corresponding to the combination of all primary color light sources;

[0109] During the process of driving the primary color light sources to emit primary color lights and collecting the second color coordinate value of the mixed light, the acquisition module 801 is specifically configured to: drive the primary color light sources to emit the primary color lights in a preset order; the preset order is the first primary color light, the second primary color light, the third primary color light, and the white light; correspondingly collect the primary color coordinate values of each primary color light, the color coordinate value of the first primary color light, the color coordinate value of the second primary color light, the color coordinate value of the third primary color light, and the color coordinate value of the white light.

[0110] As an alternative implementation manner of the embodiment of the present application, the target parameter includes the target emission duration of the primary color light source and / or the target illuminance of the primary color light;

[0111] When calculating the target parameter according to the standard color coordinate value when the deviation is greater than the deviation threshold, the adjustment module 803 is specifically configured to: when the deviation is greater than the deviation threshold, calculate the target parameter according to the standard color coordinate value based on a preset formula;

[0112] Wherein, the preset formula is:

[0113]

[0114] In the preset formula, x is the abscissa of the standard color coordinate value, y is the ordinate of the standard color coordinate value, D r is the target emission duration of the first light source, D b is the target emission duration of the second light source, D g is the target emission duration of the third light source, x r is the abscissa of the color coordinate value of the first primary color light, x g is the abscissa of the color coordinate value of the second primary color light, x b is the abscissa of the color coordinate value of the third primary color light, y r is the ordinate of the color coordinate value of the first primary color light, yg is the ordinate of the color coordinate value of the second primary color light, y b is the ordinate of the color coordinate value 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 target illuminance of the third primary color light.

[0115] As an optional implementation manner of the embodiment of the present application, during the process of adjusting the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold, the adjustment module 803 is specifically configured to: adjust the initial emission duration of the primary color light source to the target emission duration, and / or adjust the initial illuminance of the primary color light to the target illuminance, so as to adjust the second color coordinate value until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

[0116] As an optional implementation manner of the embodiment of the present application, after adjusting the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold, the adjustment module 803 is further configured to: store the first color coordinate value corresponding to the target parameter; when the color coordinate value of the ambient light is re-acquired as the first color coordinate value, adjust the color coordinate value under the ambient light according to the target parameter.

[0117] It should be noted that the above white balance adjustment device may be the electronic device in the method embodiment of the present application, or may be a functional module and / or functional entity in the electronic device that can implement the functions of the device embodiment. The embodiments of the present application do not make any limitations.

[0118] In the embodiments of the present application, each module can implement the white balance adjustment method provided in the above method embodiments, and can achieve the same technical effects. To avoid repetition, details are not described here again.

[0119] The beneficial effects of various implementation manners in this embodiment can be specifically referred to the beneficial effects of the corresponding implementation manners in the above white balance adjustment method embodiments. To avoid repetition, details are not described here again.

[0120] An embodiment of the present application further provides a laser projection device, which may include: a processor, a memory, and a program or instruction stored on the memory and executable on the processor. When the program or instruction is executed by the processor, it can implement each process of the white balance adjustment method provided in the above method embodiment and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0121] As Figure 9 shown, Figure 9 FIG. is a schematic structural diagram of the laser projection device provided by the embodiment of the present application. The laser projection device includes a processor 901, a memory 902, and a computer program stored on the memory 902 and executable on the processor 901. When the computer program is executed by the processor 901, it implements the white balance adjustment method executed as described above.

[0122] As Figure 10 shown, Figure 10 FIG. is a hardware configuration block diagram of the laser projection device provided by the embodiment of the present application. The laser projection device 200 includes: a tuner demodulator 1010, a communicator 1020, a detector 1030, an external device interface 1040, a controller 1050, a display 1060, an audio output interface 1070, a memory, a power supply, etc.

[0123] Among them, the detector 1030 includes a sound collector; the controller 1050 includes a central processing unit, a video processor, an audio processor, a graphics processor, a RAM, a ROM, and first to nth interfaces for input / output. The display 1060 may be a laser projector or may also be a projection device and a projection screen.

[0124] The tuner demodulator 1010 receives broadcast television signals through wired or wireless reception and demodulates audio and video signals, such as EPG data signals, from multiple wireless or wired broadcast television signals. The detector 1030 is used to collect signals of the external environment or for external interaction. The controller 1050 and the tuner demodulator 1010 may be located in different split devices, that is, the tuner demodulator 1010 may also be in an external device of the main device where the controller 1050 is located, such as an external set-top box, etc.

[0125] In some embodiments, the controller 1050 controls the operation of the laser projection device and responds to user operations through various software control programs stored in the memory. The controller 1050 controls the overall operation of the laser projection device 200. If a user inputs a user command through the graphical user interface (GUI) displayed on the display 1060, the user input interface receives the user input command through the GUI. Alternatively, if the user inputs a user command by inputting a specific sound or gesture, the user input interface receives the user input command by recognizing the sound or gesture through a sensor. The output interface (the display 1060, and / or the audio output interface 1070) is configured to output user interaction information; the communicator 1020 is used for communicating with the server 400 or other devices.

[0126] As Figure 11 shown, Figure 11 This is a schematic diagram of the software configuration of the laser projection device provided by the embodiments of the present application. As Figure 11 shown, the system is divided into four layers, from top to bottom are the application layer (referred to as the "application layer" for short), the application framework layer (referred to as the "framework layer" for short), the Android runtime and the system library layer (referred to as the "system runtime library layer" for short), and the kernel layer. The kernel layer includes at least one of the following drivers: audio driver, display driver, Bluetooth driver, camera driver, WIFI driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver, etc.

[0127] The embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements each process executed by the above white balance adjustment method and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0128] Among them, the computer-readable storage medium can be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc, etc.

[0129] The present application provides a computer program product, including: when the computer program product runs on a computer, it enables the computer to implement the above 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 them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and 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 sake of explanation, the above description has been made in connection with specific embodiments. However, the above exemplary discussions are not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A white balance adjustment method, characterized in that: include: Collecting the first color coordinate value of the ambient light; driving the primary color light source to emit primary color light, and collecting a second color coordinate value of mixed light, wherein the mixed light refers to light obtained by mixing the ambient light and the primary color light; Based on the first color coordinate value and the second color coordinate value, determining a corresponding relationship between the color coordinate value under the mixed light and the color coordinate value under the ambient light, wherein the corresponding relationship represents the influence of the ambient light on the color coordinate value; Based on the corresponding relationship, when the deviation between the second color coordinate value and the standard color coordinate value is greater than a deviation threshold, the second color coordinate value is adjusted until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

2. The method according to claim 1, characterized in that The method of adjusting the second color coordinate value based on the corresponding relationship, when the deviation between the second color coordinate value and the standard color coordinate value is greater than a deviation threshold, until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold, includes: When the deviation is greater than the deviation threshold, calculating the target parameter according to the standard color coordinate value; The second color coordinate value is adjusted according to the target parameter until a deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

3. The method according to claim 2, characterized in that The primary color light sources include: a first light source, a second light source and a third light source; the primary color lights include: a first primary color light corresponding to the first light source, a second primary color light corresponding to the second light source, a third primary color light corresponding to the third light source, and white light corresponding to a combination of all the primary color light sources; The driving of the primary color light source to emit primary color light and collecting the second color coordinate value of the mixed light includes: driving the primary color light sources in sequence to emit the primary color lights in a preset order; the preset order is the first primary color light, the second primary color light, the third primary color light, and the white light; The primary color coordinate values ​​of each primary color light are correspondingly collected, including the color coordinate value of the first primary color light, the color coordinate value of the second primary color light, the color coordinate value of the third primary color light, and the color coordinate value of the white light.

4. The method according to claim 3, characterized in that: The target parameters include the target luminous duration of the primary color light source and / or the target illuminance of the primary color light; When the deviation is greater than the deviation threshold, calculating the target parameter according to the standard color coordinate value includes: When the deviation is greater than the deviation threshold, calculating the target parameter based on a preset formula according to the standard color coordinate value; Wherein, the preset formula is: In the preset formula, x is the horizontal coordinate of the standard color coordinate value, y is the vertical coordinate of the standard color coordinate value, 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, x r is the abscissa of the color coordinate value of the first primary color light, x g is the abscissa of the color coordinate value of the second primary color light, x b is the abscissa of the color coordinate value of the third primary color light, y r is the ordinate of the color coordinate value of the first primary color light, y g is the ordinate of the color coordinate value of the second primary color light, y b is the ordinate of the color coordinate value 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 target illuminance of the third primary color light.

5. The method according to claim 4, characterized in that The adjusting the second color coordinate value according to the target parameter until a deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold value includes: The initial light emission duration of the primary color light source is adjusted to the target light emission duration, and / or the initial illuminance of the primary color light is adjusted to the target illuminance, so as to adjust the second color coordinate value until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

6. The method according to claim 2, characterized in that After adjusting the second color coordinate value according to the target parameter until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold, the method further includes: storing the first color coordinate value and the target parameter in correspondence; When the color coordinate value of the ambient light collected again is the first color coordinate value, the color coordinate value under the ambient light is adjusted according to the target parameter.

7. A white balance adjustment device, characterized in that: include: A collection module, used for collecting the first color coordinate value of the ambient light; driving the primary color light source to emit primary color light, and collecting a second color coordinate value of mixed light, wherein the mixed light refers to light obtained by mixing the ambient light and the primary color light; a determination module, configured to determine a correspondence between a color coordinate value under mixed light and a color coordinate value under ambient light based on the first color coordinate value and the second color coordinate value, wherein the correspondence represents an influence of ambient light on the color coordinate value; An adjustment module is used to adjust the second color coordinate value based on the corresponding relationship, when the deviation between the second color coordinate value and the standard color coordinate value is greater than a deviation threshold, until the deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

8. The device according to claim 7, characterized in that The adjustment module is specifically used for: When the deviation is greater than the deviation threshold, calculating the target parameter according to the standard color coordinate value; The second color coordinate value is adjusted according to the target parameter until a deviation between the adjusted second color coordinate value and the standard color coordinate value is less than or equal to the deviation threshold.

9. A laser projection device, characterized in that: include: A memory and a processor, the memory is used to store a computer program; the processor is used to execute the white balance adjustment method described in any one of claims 1 to 6 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 a processor, the white balance adjustment method described in any one of 1-6 is implemented.

Images