A white balance control system and control method of a laser moving head lamp

Abstract

The embodiment of the present application discloses a kind of white balance control system and control method of laser head lamp.The laser head lamp includes at least one laser and output lens group;White balance control system includes beam splitting unit, first acquisition unit, second acquisition unit and control unit;The laser output by laser is incident to beam splitting unit, and splitting is first light beam and second light beam;First acquisition unit acquires the first color information of second light beam and is transmitted to control unit;Second acquisition unit receives the partial light beam of output lens group exit, acquires second color information and is transmitted to control unit;Control unit adjusts the output characteristic of laser, to adjust the white balance of laser head lamp exit light.The technical scheme of the embodiment of the present application, by measuring the color information of laser direct output and laser head lamp output light, and according to two colors, adjust the output characteristic of laser, to adjust the white balance of laser head lamp, so that the color temperature of exit light is consistent with preset color temperature.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and in particular to a white balance control system and control method for a laser moving head light. Background Technology

[0002] Moving head lights are widely used in large-scale performances, squares and art stages, wedding venues, etc. Professional moving head moving head lights are high-tech products integrating electronics, mechanics, and optics. Due to the advantages of lasers, such as high brightness and good linearity, laser moving head lights have gained widespread application.

[0003] However, because the output end of the laser moving head light is equipped with optical components such as lenses, the color temperature of the actual light output by the laser may differ from the preset color temperature after passing through the lens, resulting in a difference between the color of the illumination light and the preset color, which affects the illumination effect. Summary of the Invention

[0004] This invention provides a white balance control system and method for a laser moving head light. The white balance control system measures the color information of the light directly output by the laser and the light output by the laser moving head light, and adjusts the output characteristics of the laser according to the two colors to adjust the white balance of the laser moving head light so that the color temperature of the emitted light is consistent with the preset color temperature.

[0005] According to one aspect of the present invention, a white balance control system for a laser moving head light is provided, the laser moving head light including at least one laser and an output lens group, the output lens group being used to focus the laser output by the laser and then emit it.

[0006] The white balance control system includes a beam splitting unit, a first acquisition unit, a second acquisition unit, and a control unit. The first acquisition unit, the second acquisition unit, and the laser are all connected to the control unit.

[0007] The laser output from the laser is incident on the beam splitting unit and split into a first beam and a second beam. The first beam is transmitted through the output lens group and then exits. The power of the first beam is greater than that of the second beam.

[0008] The first acquisition unit receives the second beam, acquires the first color information of the second beam, and transmits it to the control unit;

[0009] The second acquisition unit receives a portion of the light beam emitted from the output lens group, acquires the second color information, and transmits it to the control unit;

[0010] The control unit is used to adjust the output characteristics of the laser according to the first color information and the second color information, so as to adjust the white balance of the emitted light of the laser moving head light.

[0011] Optionally, the laser moving head light includes N lasers, the beam splitting unit includes an optical fiber coupler, the optical fiber coupler includes N+1 input ends and 1 output end, the N input ends of the optical fiber coupler are respectively connected to the output ends of the N lasers, and the N+1th input end of the optical fiber coupler is connected to the first acquisition unit.

[0012] The laser beams output from the N lasers are combined by the fiber coupler. The first beam is output from the output end of the fiber coupler to the output lens group, and the second beam is output from the (N+1)th input end of the fiber coupler to the first acquisition unit.

[0013] Where N is an integer greater than or equal to 1.

[0014] Optionally, the first acquisition unit is disposed inside the laser moving head light, and the first acquisition unit includes a color sensor, and the second acquisition unit includes an illuminance meter;

[0015] The illuminance meter acquires the color temperature and first chromaticity coordinates of the light emitted from the output lens group, and transmits the color temperature and first chromaticity coordinates to the control unit.

[0016] The color sensor acquires the second color coordinates of the second beam and transmits the second color coordinates to the control unit;

[0017] The control unit is also used to determine whether the color temperature has reached a preset color temperature;

[0018] If so, the control unit stores the first color coordinates and the second color coordinates.

[0019] Optionally, if the control unit determines that the color temperature has not reached the preset color temperature, the control unit adjusts the output characteristics of the laser. After each adjustment, the illuminance meter obtains the color temperature and first color coordinates of the emitted light from the output lens group, and the color sensor obtains the second color coordinates of the second beam until the color temperature reaches the preset color temperature. The control unit stores the first color coordinates and the second color coordinates.

[0020] Optionally, the laser includes a semiconductor laser diode, and the control unit adjusts the output characteristics of the laser by changing the drive current of the semiconductor laser diode.

[0021] Optionally, the first acquisition unit further includes a light homogenizer and a filter, and the second light beam is transmitted through the light homogenizer and the filter in sequence before being incident on the color sensor.

[0022] Optionally, the laser moving head light further includes a light-diffusing rod, through which the first beam is diffracted and then transmitted to the output lens group.

[0023] According to another aspect of the present invention, a white balance control method for a laser moving head light is provided, executed by the aforementioned white balance control system, the white balance control method comprising:

[0024] The laser outputs laser light, which is incident on a beam splitting unit and split into a first beam and a second beam. The first beam is transmitted through an output lens group and then exits.

[0025] The first acquisition unit receives the second beam, acquires the first color information of the second beam, and transmits it to the control unit;

[0026] The second acquisition unit receives a portion of the light beam emitted from the output lens group, acquires the second color information, and transmits it to the control unit.

[0027] The control unit adjusts the output characteristics of the laser according to the first color information and the second color information to adjust the white balance of the emitted light from the laser moving head light.

[0028] Optionally, the first acquisition unit includes a color sensor, and the second acquisition unit includes an illuminance meter;

[0029] The illuminance meter acquires the color temperature and first chromaticity coordinates of the light emitted from the output lens group, and transmits the color temperature and first chromaticity coordinates to the control unit.

[0030] The color sensor acquires the second color coordinates of the second beam and transmits the second color coordinates to the control unit;

[0031] The control unit determines whether the color temperature has reached the preset color temperature;

[0032] If so, the control unit stores the first color coordinates and the second color coordinates.

[0033] Optionally, after the control unit determines whether the color temperature has reached the preset color temperature, it further includes:

[0034] If the control unit determines that the color temperature has not reached the preset color temperature, the control unit adjusts the output characteristics of the laser. After each adjustment, the illuminance meter obtains the color temperature and first color coordinates of the emitted light from the output lens group, and the color sensor obtains the second color coordinates of the second beam until the color temperature reaches the preset color temperature. The control unit stores the first color coordinates and the second color coordinates.

[0035] The white balance control system for a laser moving head light provided in this embodiment of the invention includes at least one laser and an output lens group. The output lens group is used to focus the laser light output by the laser and then emit it. The white balance control system includes a beam splitting unit, a first acquisition unit, a second acquisition unit, and a control unit. The first acquisition unit, the second acquisition unit, and the laser are all connected to the control unit. The laser light output by the laser is incident on the beam splitting unit and split into a first beam and a second beam. The first beam is transmitted through the output lens group and then emitted. The power of the first beam is greater than that of the second beam. The first acquisition unit receives the second beam, acquires the first color information of the second beam, and transmits it to the control unit. The second acquisition unit receives a portion of the beam emitted from the output lens group, acquires the second color information, and transmits it to the control unit. The control unit is used to adjust the output characteristics of the laser based on the first and second color information to adjust the white balance of the emitted light from the laser moving head light. The technical solution of this embodiment of the invention adjusts the white balance of the laser moving head light by measuring the color information of the light directly output by the laser and the light output by the laser moving head light, and adjusting the output characteristics of the laser based on the two colors, so that the color temperature of the emitted light is consistent with a preset color temperature.

[0036] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the white balance control system of a laser moving head light provided in an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of another white balance control system for a laser moving head light provided in an embodiment of the present invention;

[0040] Figure 3 This is a flowchart illustrating a white balance control method for a laser moving head light, provided in an embodiment of the present invention. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] Figure 1 This is a schematic diagram of the white balance control system of a laser moving head light provided in an embodiment of the present invention, with reference to... Figure 1 The laser moving head light 10 includes at least one laser 11. Figure 1 (Taking a laser 11 as an example, not a limitation of the embodiment of the present invention) and an output lens group 12, the output lens group 12 is used to focus the laser output by the laser 11 and then emit it; the white balance control system 20 includes a beam splitting unit 21, a first acquisition unit 22, a second acquisition unit 23 and a control unit 24, the first acquisition unit 22, the second acquisition unit 23 and the laser 11 are all connected to the control unit 24; the laser a output by the laser 11 is incident on the beam splitting unit 21 and split into a first beam a1 and a second beam a2. The first beam a1 is emitted after being transmitted through the output lens group 12, and the power of the first beam a1 is greater than the power of the second beam a2; the first acquisition unit 22 receives the second beam a2, acquires the first color information of the second beam a2 and transmits it to the control unit 24; the second acquisition unit 23 receives part of the beam emitted by the output lens group 12, acquires the second color information and transmits it to the control unit 24; the control unit 24 is used to adjust the output characteristics of the laser 11 according to the first color information and the second color information to adjust the white balance of the light emitted by the laser moving head light 10.

[0044] The laser moving head light 10 is a product integrating electronics, mechanics, and optics. It features stability, reliability, excellent luminous efficiency, accurate positioning, good heat dissipation, and an ergonomic design that conforms to the lamp body and material structure. Its specific structure can be designed according to actual conditions. This embodiment of the invention does not limit the structure of the laser moving head light 10; only structures related to this embodiment are described here. The laser 11 may include multiple sub-lasers that emit red, green, and blue light respectively, to achieve different colors of laser output. The inventors discovered that, in order to improve the collimation and uniformity of the output beam of the laser moving head light 10, an output lens group 12 is generally set at the output end of the laser moving head light 10. The output lens group 12 may include at least one convex lens. Since the transmittance of the output lens group 12 for different wavelengths of light varies, the color temperature of the light output by the output lens group 12 may differ from the preset color temperature. The preset color temperature is set according to the output characteristics of the laser 11. Because the color temperature output by the output lens group 12 differs from the preset color temperature, the actual color output by the laser moving head light 10 will deviate from the preset color, affecting the lighting effect.

[0045] To address the aforementioned issues, this embodiment of the invention designs a beam splitting unit 21 to divide the laser output from laser 11 into two beams. The first beam a1 (representing the majority of the light, e.g., above 99%) is transmitted to the output lens group 12. A second acquisition unit 23 is positioned at the output end of the output lens group 12 to acquire the second color information of the output light, which may include color temperature and color coordinates. The second beam a2 (representing a small portion of the light, e.g., below 1%, used only for detection) is received by the first acquisition unit 22, which acquires the first color information, which may include color coordinates. The color coordinates in the first and second color information may differ to some extent. The control unit 24 can pre-store preset color temperature information required for the output light of the laser moving head light 10. The control unit 24 compares the color temperature in the first color information with the preset color temperature. When the two differ, the control unit adjusts the output characteristics of laser 11 until the emitted light meets the requirements.

[0046] It is understood that the white balance control system of the laser moving head light provided in this embodiment of the invention can be used to calibrate the white balance when the laser moving head light leaves the factory. In actual application scenarios of laser moving head lights, since the laser moving head lights are not disposable and need to be installed in different locations depending on the actual purpose, in order to ensure the portability of the laser moving head light and simplify the structure, the white balance control system used for calibration at the factory will not be moved with the laser moving head light to the specific application scenario. Therefore, this embodiment of the invention uses the white balance control system to collect first color information and second color information, and stores the color coordinates corresponding to the first color information and second color information when the emitted light color temperature reaches the preset color temperature. Specifically, it can be stored in the controller of the laser moving head light. After the laser moving head light is calibrated, its internal optical components are fixed. During normal use and under the usage environment, the performance and position of the optical components will not change significantly. Therefore, the correspondence between the sampled light data and the emitted light data can always be maintained. When using the laser moving head light later, this can be used as a standard to control the operation of the laser moving head light, so that the emitted light meets the requirements at the factory.

[0047] The technical solution of this invention measures the color information of the light directly output by the laser and the light output by the laser moving head light, and adjusts the output characteristics of the laser according to the two colors to adjust the white balance of the laser moving head light so that the color temperature of the emitted light is consistent with the preset color temperature.

[0048] In another embodiment, optionally, the laser moving head light includes N lasers, and the beam splitting unit includes an optical fiber coupler. The optical fiber coupler includes N+1 input ends and 1 output end. The N input ends of the optical fiber coupler are respectively connected to the output ends of the N lasers, and the N+1th input end of the optical fiber coupler is connected to the first acquisition unit. The lasers output by the N lasers are combined by the optical fiber coupler. The first beam is output from the output end of the optical fiber coupler to the output lens group, and the second beam is output from the N+1th input end of the optical fiber coupler to the first acquisition unit. Here, N is an integer greater than or equal to 1.

[0049] For example, taking N=2 as an example, Figure 2 This is a schematic diagram of another white balance control system for a laser moving head light provided in an embodiment of the present invention, with reference to... Figure 2 The laser 11 includes a first laser 111 and a second laser 112. The beam splitting unit 21 includes an optical fiber coupler with three input ends and one output end. The output ends of the first laser 111 and the second laser 112 are both connected to the input ends of the optical fiber coupler. Since a small portion of the light energy inside the optical fiber is emitted from the third input end and is not affected by stray light inside the moving head light, 33 is connected to the third input end of the optical fiber coupler. Because optical fiber is flexible, it helps to reduce the size of the laser moving head light.

[0050] Optionally, the first acquisition unit 22 is disposed inside the laser moving head light 10. The first acquisition unit 22 includes a color sensor 221, and the second acquisition unit 23 includes an illuminance meter. The illuminance meter acquires the color temperature and first chromaticity coordinates of the light emitted from the output lens group 12 and transmits the color temperature and first chromaticity coordinates to the control unit 24. The color sensor 221 acquires the second chromaticity coordinates of the second beam and transmits the second chromaticity coordinates to the control unit 24. The control unit 24 is also used to determine whether the color temperature has reached the preset color temperature. If so, the control unit 24 stores the first chromaticity coordinates and the second chromaticity coordinates.

[0051] It is understandable that when the color temperature of the emitted light measured by the illuminance meter is the same as the preset color temperature, it indicates that the light output conditions of the laser moving head light 10 meet the requirements. At this time, no white balance adjustment is performed. The control unit 21 stores the correspondence between the first color coordinate and the second color coordinate. In subsequent use, the laser moving head light 10 is driven to run under the same conditions.

[0052] Optionally, if the control unit 24 determines that the color temperature has not reached the preset color temperature, the control unit 24 adjusts the output characteristics of the laser 11. After each adjustment, the illuminance meter acquires the color temperature and first chromaticity coordinates of the emitted light from the output lens group 12, and the color sensor acquires the second chromaticity coordinates of the second beam, until the color temperature reaches the preset color temperature. The control unit 24 then stores the first and second chromaticity coordinates. Optionally, the laser 11 includes a semiconductor laser diode (LD), and the control unit 24 adjusts the output characteristics of the laser by changing the driving current of the semiconductor laser diode.

[0053] For example, in one embodiment, the preset color temperature of the laser moving head light 10 is 7500K. When the color temperature of the emitted light is inconsistent with the preset color temperature, the control unit 24 performs a white balance calibration process. The control unit 24 can be a host computer with built-in white balance control software. The host computer calibration software sends a "start calibration" command to an external illuminance meter of the moving head light. The illuminance meter automatically detects the color temperature of the light emitted by the moving head light and returns the result to the host computer software. The software algorithm determines whether the beam has reached a white balance state of 7500K. If so, the color coordinate data X, Y, Z of the color sensor are recorded in the white balance control software; if not, the RGB current of the laser is adjusted through the algorithm, and the process of illuminance meter detection and host computer software judgment is repeated until the illuminance meter detects that the moving head light's color temperature has reached a white balance state of 7500K. After calibration, the laser moving head light can detect whether the light is color-biased each time it restarts and automatically adjust the white balance. The specific adjustment algorithm of the laser can be designed according to actual conditions, and this embodiment of the invention does not limit this.

[0054] Optional, continue to refer to Figure 2The first acquisition unit 22 further includes a light homogenizer 222 and a filter 223. The second light beam is transmitted through the light homogenizer 222 and the filter 223 in sequence and then incident on the color sensor 221. The specific light homogenizer 222 and filter 223 can be selected according to the actual situation, and the embodiments of the present invention do not limit them.

[0055] Optional, continue to refer to Figure 1 or Figure 2 The laser moving head light 10 also includes a light-diffusing rod 13, through which the first beam is homogenized and then transmitted to the output lens group 12. The light-diffusing rod 13 can be a hexagonal light-diffusing rod, used to homogenize the laser beam before transmitting it to the output lens group 12. The output lens group 12 can be a fixed-focus lens group or a zoom lens group, which can be flexibly selected according to the actual scenario during specific implementation.

[0056] Figure 3 This is a flowchart illustrating a white balance control method for a laser moving head light according to an embodiment of the present invention. This white balance control method is executed by any of the white balance control systems provided in the above embodiments. (Refer to...) Figure 3 The white balance control method provided in this embodiment includes:

[0057] S110, The laser outputs laser light, which is incident on the beam splitting unit and split into a first beam and a second beam. The first beam is transmitted through the output lens group and then exits.

[0058] The first beam has higher power and is used as the output beam for illumination, while the second beam has lower power and is used only for detection. Fiber optic couplers can be used as the beam splitter unit.

[0059] S120. The first acquisition unit receives the second beam, acquires the first color information of the second beam, and transmits it to the control unit.

[0060] The first acquisition unit is located inside the laser moving head light and can be a color sensor. The first color information includes the color coordinate information of the second beam. The first acquisition unit can be connected to the control unit via a USB interface to transmit the color coordinate information of the second beam to the control unit.

[0061] S130: The second acquisition unit receives a portion of the light beam emitted from the output lens group, acquires the second color information, and transmits it to the control unit.

[0062] The second acquisition unit is located outside the laser moving head light and is connected to the control unit via a USB interface. An illuminance meter can be selected. The second color information includes color temperature and color coordinates.

[0063] S140 The control unit adjusts the output characteristics of the laser according to the first color information and the second color information to adjust the white balance of the laser moving head light emitted.

[0064] When the color temperature of the emitted light is inconsistent with the preset color temperature, the control unit performs a white balance calibration process to change the output characteristics of the laser to achieve a white balance state.

[0065] The technical solution of this invention measures the color information of the light directly output by the laser and the light output by the laser moving head light, and adjusts the output characteristics of the laser according to the two colors to adjust the white balance of the laser moving head light so that the color temperature of the emitted light is consistent with the preset color temperature.

[0066] Optionally, the first acquisition unit includes a color sensor, and the second acquisition unit includes an illuminance meter; the illuminance meter acquires the color temperature and first chromaticity coordinates of the light emitted from the output lens group, and transmits the color temperature and first chromaticity coordinates to the control unit; the color sensor acquires the second chromaticity coordinates of the second beam, and transmits the second chromaticity coordinates to the control unit; the control unit determines whether the color temperature has reached the preset color temperature; if so, the control unit stores the first chromaticity coordinates and the second chromaticity coordinates.

[0067] When the color temperature of the emitted light measured by the illuminance meter is the same as the preset color temperature, it indicates that the light output conditions of the laser moving head light meet the requirements. At this time, no white balance adjustment is performed. The control unit stores the correspondence between the first color coordinate and the second color coordinate. In subsequent use, the laser moving head light will be driven to run under the same conditions.

[0068] Optionally, after the control unit determines whether the color temperature has reached the preset color temperature, it also includes:

[0069] If the control unit determines that the color temperature has not reached the preset color temperature, the control unit adjusts the output characteristics of the laser. After each adjustment, the illuminance meter obtains the color temperature and first color coordinates of the emitted light from the output lens group, and the color sensor obtains the second color coordinates of the second beam until the color temperature reaches the preset color temperature. The control unit then stores the first color coordinates and the second color coordinates.

[0070] For example, in one embodiment, the preset color temperature of the laser moving head light is 7500K. When the color temperature of the emitted light is inconsistent with the preset color temperature, the control unit performs a white balance calibration process. The control unit can be a host computer with built-in white balance control software. The host computer calibration software sends a "start calibration" command to an external illuminance meter of the moving head light. The illuminance meter automatically detects the color temperature of the light emitted by the moving head light and returns it to the host computer software. The software algorithm determines whether the beam has reached a white balance state of 7500K. If so, the color coordinate data X, Y, and Z of the color sensor are recorded in the white balance control software; if not, the RGB current of the laser is adjusted through the algorithm until the illuminance meter detects that the moving head light's color temperature has reached a white balance state of 7500K. After calibration, the laser moving head light can detect whether the light is color-biased each time it restarts and automatically adjust the white balance.

[0071] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A white balance control system for a laser moving head light, characterized in that, The laser moving head light includes at least one laser and an output lens group, the output lens group being used to focus the laser output by the laser and then emit it. The white balance control system includes a beam splitting unit, a first acquisition unit, a second acquisition unit, and a control unit. The first acquisition unit, the second acquisition unit, and the laser are all connected to the control unit. The laser output from the laser is incident on the beam splitting unit and split into a first beam and a second beam. The first beam is transmitted through the output lens group and then exits. The power of the first beam is greater than that of the second beam. The first acquisition unit receives the second beam, acquires the first color information of the second beam, and transmits it to the control unit; The second acquisition unit receives a portion of the light beam emitted from the output lens group, acquires the second color information, and transmits it to the control unit; The control unit is used to adjust the output characteristics of the laser according to the first color information and the second color information, so as to adjust the white balance of the laser moving head light emitted from it; The first color information includes color coordinates, and the second color information includes color temperature and color coordinates. The control unit is also used to store the color coordinates in the first color information and the second color information when the color temperature of the emitted light of the laser moving head light reaches a preset color temperature.

2. The white balance control system for the laser moving head light according to claim 1, characterized in that, The laser moving head light includes N lasers, the beam splitting unit includes an optical fiber coupler, the optical fiber coupler includes N+1 input ends and 1 output end, the N input ends of the optical fiber coupler are respectively connected to the output ends of the N lasers, and the N+1th input end of the optical fiber coupler is connected to the first acquisition unit. The laser beams output from the N lasers are combined by the fiber coupler. The first beam is output from the output end of the fiber coupler to the output lens group, and the second beam is output from the (N+1)th input end of the fiber coupler to the first acquisition unit. Where N is an integer greater than or equal to 1.

3. The white balance control system for the laser moving head light according to claim 1, characterized in that, The first acquisition unit is disposed inside the laser moving head light. The first acquisition unit includes a color sensor, and the second acquisition unit includes an illuminance meter. The illuminance meter acquires the color temperature and first chromaticity coordinates of the light emitted from the output lens group, and transmits the color temperature and first chromaticity coordinates to the control unit. The color sensor acquires the second color coordinates of the second beam and transmits the second color coordinates to the control unit; The control unit is also used to determine whether the color temperature has reached a preset color temperature; If so, the control unit stores the first color coordinates and the second color coordinates.

4. The white balance control system for a laser moving head light according to claim 3, characterized in that, If the control unit determines that the color temperature has not reached the preset color temperature, the control unit adjusts the output characteristics of the laser. After each adjustment, the illuminance meter obtains the color temperature and first color coordinates of the emitted light from the output lens group, and the color sensor obtains the second color coordinates of the second beam until the color temperature reaches the preset color temperature. The control unit stores the first color coordinates and the second color coordinates.

5. The white balance control system for a laser moving head light according to claim 4, characterized in that, The laser includes a semiconductor laser diode, and the control unit adjusts the output characteristics of the laser by changing the drive current of the semiconductor laser diode.

6. The white balance control system for a laser moving head light according to claim 3, characterized in that, The first acquisition unit further includes a light homogenizer and a filter. The second light beam is transmitted through the light homogenizer and the filter in sequence and then incident on the color sensor.

7. The white balance control system for a laser moving head light according to claim 1, characterized in that, The laser moving head light also includes a light-diffusing rod, and the first beam is transmitted to the output lens group after being diffuted by the light-diffusing rod.

8. A white balance control method for a laser moving head light, characterized in that, The white balance control method is executed by the white balance control system according to any one of claims 1 to 7, wherein the white balance control method comprises: The laser outputs laser light, which is incident on a beam splitting unit and split into a first beam and a second beam. The first beam is transmitted through an output lens group and then exits. The first acquisition unit receives the second beam, acquires the first color information of the second beam, and transmits it to the control unit; The second acquisition unit receives a portion of the light beam emitted from the output lens group, acquires the second color information, and transmits it to the control unit. The control unit adjusts the output characteristics of the laser according to the first color information and the second color information to adjust the white balance of the laser moving head light emitted; The first color information includes color coordinates, and the second color information includes color temperature and color coordinates. The control unit is also used to store the color coordinates in the first color information and the second color information when the color temperature of the emitted light of the laser moving head light reaches a preset color temperature.

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