WO2021208827A1 - 光源亮度调节方法、系统、电子设备及计算机可读存储介质 - Google Patents

光源亮度调节方法、系统、电子设备及计算机可读存储介质 Download PDF

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WO2021208827A1
WO2021208827A1 PCT/CN2021/086422 CN2021086422W WO2021208827A1 WO 2021208827 A1 WO2021208827 A1 WO 2021208827A1 CN 2021086422 W CN2021086422 W CN 2021086422W WO 2021208827 A1 WO2021208827 A1 WO 2021208827A1
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Prior art keywords
control signal
power supply
brightness information
brightness
video image
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PCT/CN2021/086422
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English (en)
French (fr)
Inventor
黄国生
覃锋
胡飞
王则钦
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深圳光峰科技股份有限公司
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Publication of WO2021208827A1 publication Critical patent/WO2021208827A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2053—Intensity control of illuminating light
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits

Definitions

  • This application belongs to the technical field of light source adjustment, and specifically relates to light source brightness adjustment methods, systems, electronic equipment and devices.
  • the brightness adjustment technology can be used to adjust the backlight brightness.
  • the continuous innovation and breakthrough of projection technology and lower and lower implementation costs, especially the gradual popularization of laser projectors have gradually replaced some large-screen traditional TVs used in homes by laser projectors.
  • high-power LEDs or lasers and other light sources supporting drive power and chip solutions are in a lagging state, and the light source brightness adjustment speed is relatively slow.
  • This application provides a method, system, electronic equipment and device for adjusting the brightness of a light source to solve the problem of slow adjustment speed of the brightness of the light source.
  • a technical solution adopted in this application is: a method for adjusting the brightness of a light source, including: obtaining brightness information of a video image; searching for the brightness information in a pre-made query table to determine a match with the brightness information
  • the pre-made look-up table includes a variety of brightness information and corresponding control signals; the control signal is used to control the power supply system to output a current value matching the brightness information to adjust the light source brightness of the video image.
  • the method before the acquiring the brightness information of the video image, includes: acquiring the brightness information of a plurality of sample images; and determining the brightness information of each sample image according to the brightness information of each sample image. The current value matched by the brightness information; the control signal for controlling the power supply system is determined according to the current value; the control signal corresponding to each brightness information is recorded to obtain the pre-made look-up table.
  • control signal is a pulse width modulation signal.
  • the power supply system includes a plurality of power supply units, a plurality of the power supply units are connected in a loop, and the control signal directly controls one of the power supply units.
  • the controlling the power supply system to output a current value matching the brightness information by using the control signal includes: providing the power supply system to the power supply system within a first predetermined time before the end of the display of the current frame video image Send a control signal for the next frame of video image; before the current frame of video image is displayed and before the next frame of video image is displayed, the power supply system output matches the brightness information of the next frame of video image The current value.
  • the searching for the brightness information in a pre-made look-up table to determine a control signal matching the brightness information includes: determining whether the pre-made look-up table includes the brightness information; If the pre-made look-up table includes the brightness information, the control signal corresponding to the brightness information is determined according to the pre-made look-up table; if the pre-made look-up table does not include the brightness information, the matching current value is determined according to the brightness information , Determining the control signal for controlling the power supply system according to the current value; at the same time, recording the brightness information and the corresponding control signal in the pre-made look-up table.
  • a light source brightness adjustment system including an image processing system and a power supply system that are coupled to each other;
  • the image processing system obtains the brightness information of the video image, and searches a pre-made look-up table according to the brightness information to determine the control signal matching the brightness information; the image processing system uses the control signal to control the output of the power supply system and The current value matched by the brightness information is used to adjust the brightness of the light source of the video image.
  • the light source brightness adjustment system further includes a signal distribution unit that is electrically connected between the image processing system and a power supply system, the power supply system includes a plurality of power supply units, and The plurality of power supply units includes a first power supply unit, and the image processing system distributes a control signal to each of the power supply units through the signal distribution unit;
  • the signal distribution unit is an independent unit, or the signal distribution unit is integrated with the image processing system, or the signal distribution unit is integrated with the power supply system.
  • a plurality of the power supply units are connected in a loop, each of the plurality of power supply units has a control signal input/loop out interface, and the plurality of power supply units pass through the control signal input/loop out interface
  • the image processing system is electrically connected to the control signal input/loop-out interface of the first power supply unit to output a control signal, and the first power supply unit receives and executes the control signal while passing through Its control signal input/loop-out interface transmits the received control signal to the control signal input/loop-out interface of the next power supply unit, thereby realizing signal distribution of the control signal output by the image processing system.
  • an electronic device including a memory and a processor coupled to each other, and the processor is configured to execute the program instructions stored in the memory to implement any of the above.
  • a device with a storage function the device stores program data, and the program data can be executed to implement any of the above methods.
  • the beneficial effect of this application is that the brightness information of the video image can directly correspond to the control signal by setting the pre-made lookup table, and the control signal is combined with the video image synchronization information to quickly and dynamically adjust the power drive current value to achieve the brightness of the video image. Quickly adjust to achieve the difference between light and dark between different frames of images, improve the contrast of video images, no need to analyze the brightness information and power drive characteristics to obtain the required current value, and then obtain the corresponding control signal, which improves the efficiency of adjusting the brightness of the light source .
  • FIG. 1 is a schematic flowchart of an embodiment of a method for adjusting the brightness of a light source according to the present application
  • FIG. 2 is a schematic flow chart of a method for forming a pre-made lookup table in an embodiment of a method for adjusting the brightness of a light source of the present application;
  • FIG. 3 is a schematic diagram of a pre-made lookup table in an embodiment of the method for adjusting the brightness of a light source according to the present application;
  • FIG. 4 is a schematic diagram of a double pulse width modulation signal in an embodiment of a method for adjusting the brightness of a light source according to the present application;
  • FIG. 5 is a schematic structural diagram of an embodiment of the light source brightness adjustment system of the present application.
  • Fig. 6 is a schematic structural diagram of an embodiment of an electronic device of the present application.
  • FIG. 7 is a schematic structural diagram of an embodiment of a device with a storage function according to the present application.
  • FIG. 1 is a schematic flowchart of an embodiment of a method for adjusting the brightness of a light source according to the present application.
  • An embodiment of the present application provides a method for adjusting the brightness of a light source, including the following steps:
  • the image processing system obtains the brightness information of the video image.
  • the video image includes multiple frames of continuous images.
  • the brightness information includes the primary color ratio or white balance ratio of the light source in each area of each frame of the image.
  • the light source includes a three-color light source or a white light source. .
  • S12 retrieve the brightness information in the pre-made look-up table to determine the control signal matching the brightness information.
  • the brightness information is retrieved in a pre-made look-up table to determine a control signal matching the brightness information.
  • the pre-made look-up table includes a variety of brightness information and corresponding control signals.
  • the pre-made look-up table is pre-calculated and recorded as a look-up table according to the characteristics of the light source and the power drive.
  • the brightness information of the light source corresponding to the video image corresponds to the required control signal one-to-one, and has an index number.
  • the pre-made query The table may also include the current value of the power supply system corresponding to the brightness information.
  • the brightness information of the video image can directly correspond to the control signal, and the brightness of the light source can be quickly and dynamically adjusted to achieve the difference between light and dark between different frames of images, improve the contrast of the video image, and no need to analyze the brightness information and power drive
  • the characteristic obtains the required current value, and then the corresponding control signal is obtained, which improves the efficiency of adjusting the brightness of the light source.
  • retrieving the brightness information in the pre-made lookup table to determine the control signal matching the brightness information includes:
  • the pre-made look-up table includes the brightness information, determine the control signal corresponding to the brightness information according to the pre-made look-up table;
  • the matching current value is determined according to the brightness information, and the control signal for controlling the power supply system is determined according to the current value.
  • the brightness information and the corresponding control signal are recorded in the pre-made look-up table.
  • the pre-made look-up table may also include the current value corresponding to the brightness information. In this way, the control signal corresponding to the brightness information can be continuously determined, and the pre-made query can be continuously updated.
  • the brightness information can also be used to calculate the corresponding control signal based on the similar brightness information recorded in the pre-made look-up table.
  • FIG. 2 is a schematic flowchart of a method for forming a pre-made lookup table in an embodiment of a method for adjusting brightness of a light source of the present application
  • FIG. 3 is an embodiment of a method for adjusting brightness of a light source of the present application Schematic diagram of the pre-made lookup table in.
  • the method for forming the pre-made lookup table includes the following steps:
  • S121 Acquire brightness information of multiple sample images.
  • the sample image used when forming the pre-made lookup table may be the video image in this embodiment, or other images may be used. Multiple sample images have a variety of brightness information.
  • the brightness information includes the primary color ratio or white balance ratio of the light source in each area of each frame of image. The more sample images, the more detailed the pre-made lookup table.
  • the same light source or the same type of light source can use the same pre-made lookup table.
  • S122 Determine a current value matching the brightness information of each sample image according to the brightness information of each sample image.
  • the brightness information of each sample image determine the current value of the light source that the brightness information of each sample image matches.
  • Each brightness information of the recording light source corresponds to the required control signal, and further, the current value corresponding to each brightness information can also be recorded.
  • the brightness information of the light source, the current value of the power supply system and the control signal output by the image processing system are recorded in a one-to-one correspondence and then formed into a pre-made look-up table with an index number.
  • S13 Use the control signal to control the power supply system to output a current value matching the brightness information to adjust the brightness of the light source of the video image.
  • the image processing system uses the control signal to control the power supply system to output a current value matching the brightness information to adjust the brightness of the light source of the video image.
  • the control signal is determined to be a pulse width modulation signal (PWM). Furthermore, the control signal is a multi-pulse control method, which has the characteristics of rapid adjustment .
  • the image processing system delivers PWM with different duty cycles to the power supply system to achieve the purpose of outputting different current values for the power supply system.
  • the PWM duty cycle of multi-pulse control mode is calculated as:
  • PWM sum(T1,T3,...Tn-1)/sum(T1,T2,...,Tn)
  • control signal is a double-pulse control method
  • PWM duty ratio calculation is specifically described in the following double-pulse control method.
  • FIG. 4 is a schematic diagram of a dual pulse width modulation signal in an embodiment of a method for adjusting the brightness of a light source according to the present application.
  • T 1 the first rising edge of PWM
  • T 2 the second rising edge
  • T 3 the second rising edge to the second falling edge
  • T 1 10 ⁇ s
  • T 2 23.3 ⁇ s
  • using the control signal to control the power supply system to output a current value matching the brightness information includes:
  • the control signal of the next frame of video image is sent to the power supply system.
  • the first predetermined time can be comprehensively evaluated according to the power response speed and the image refresh rate. Specifically, the first predetermined time may be 100 ⁇ s.
  • the power supply system After the current frame of video image is displayed and the next frame of video image is displayed, the power supply system outputs the current value that matches the brightness information, so as to adjust the brightness of the next frame of video image to achieve the brightness difference between different frame images and improve The contrast of the video image. Specifically, there is an interval of 300 ⁇ s between the current frame image and the next frame image.
  • the interval time between the current frame of video image and the next frame of video image is 300 ⁇ s. 400 ⁇ s before the next frame of video image is displayed, the image processing system starts to send a control signal to the power supply system, and the interval before the next frame of video image is displayed. 300 ⁇ s. At this time, the current frame of video image is displayed. The power supply system responds to the control signal and starts to adjust the current value. The current will be adjusted within 300 ⁇ s.
  • the power supply system has responded to the control signal and output the corresponding current value to adjust the brightness. If within 100us before the end of the display of each frame of video image, the control signal corresponding to the current frame of video image is still not responded, the corresponding brightness adjustment of the current frame of video image is no longer performed, and the brightness adjustment of the next frame of video image is started.
  • the image processing system when the current frame of video image is displayed, the image processing system obtains the brightness information of the next frame of video image, and determines the control signal of the next frame of video image.
  • the overall brightness information may be obtained in advance, and the control signal of all images of the video image may be determined in advance, and the control signal may correspond to the playback time of each frame of the video image.
  • the light source brightness adjustment system further includes a signal distribution unit electrically connected between the image processing system and the power supply system.
  • the power supply system includes a plurality of power supply units, and the control signal is distributed to each unit through the signal distribution unit. A power supply unit to realize the control of each power supply unit.
  • the signal distribution unit may be an independent unit; it may also be integrated into the image processing system, that is, it is designed as an integrated design with the image processing system; it may also be integrated into the power supply system, that is, it is integrated with the power supply system. design.
  • the function of the signal distributing unit can also be implemented in a manner in which the image processing system is electrically connected to each power supply unit.
  • the image processing system can directly input the control signal to one of the power supply units electrically connected to it, and multiple power supply units in the power supply system are looped in sequence, so that the multiple power supply units can simultaneously respond to the rapid modulation of the control signal.
  • the specific signal transmission process is as follows: multiple power supply units in the power supply system have a control signal input/loop output interface, and the control signal input/loop output interface of each power supply unit has the same function.
  • the image processing system is directly electrically connected to the control signal input/loop output interface of one of the power supply units to output a control signal
  • the power supply unit is defined as the first power supply unit
  • the other multiple power supply units are input/looped through the control signal
  • the output interface is connected with electrical signals in turn, and is defined as the second power supply unit, the third power supply unit, etc., that is, the first power supply unit communicates with the control signal input/loop output interface of the second power supply unit through its control signal input/loop output interface.
  • the second power supply unit is electrically connected with the control signal input/loop output interface of the third power supply unit through its control signal input/loop output interface, and so on.
  • the first power supply unit receives the control signal, and while executing the control signal by itself, transmits the received control signal to the control signal input/loop-out interface of the second power supply unit through its control signal input/loop-out interface, and the second power supply While the unit receives and executes the control signal, it transmits the received control signal to the control signal input/loop out interface of the third power supply unit through its control signal input/loop out interface, and the third power supply unit receives the control signal, and so on , Until all power supply units receive the control signal, so as to realize the signal distribution of the control signal output by the image processing system.
  • the loop connection control method By adopting the loop connection control method, multiple power supply units can respond to the rapid modulation of the control signal at the same time; in addition, the loop connection control method can also realize that multiple power boards use the same circuit structure, and the power supply units can share one set The connection position between the mold and the power supply unit can be exchanged, which saves cost and the connection method is easier to operate.
  • the brightness information of the video image can directly correspond to the control signal, and the PWM control signal is used in combination with the video image synchronization information to quickly and dynamically adjust the power drive current value to achieve rapid adjustment of the brightness of the video image.
  • the power supply system in the present application adopts a loop control method to realize synchronous control of multiple power supply units.
  • the light source brightness adjustment method of the present application is suitable for the brightness adjustment of light sources such as high-power LEDs or lasers.
  • FIG. 5 is a schematic structural diagram of an embodiment of a light source brightness adjustment system of the present application.
  • a light source brightness adjustment system 20 which includes an image processing system 21 and a power supply system 22 that are coupled to each other.
  • the image processing system 21 obtains the brightness information of the video image, and searches a pre-made look-up table according to the brightness information to determine a control signal matching the brightness information.
  • the image processing system 21 uses a control signal to control the power supply system 22 to output a current value matching the brightness information to adjust the brightness of the light source of the video image.
  • the light source brightness adjustment system 20 further includes a signal distribution unit electrically connected between the image processing system 21 and the power supply system 22.
  • the power supply system 22 includes a plurality of power supply units 221, and the control signal is distributed to each of them through the signal distribution unit.
  • the power supply unit 221 to realize the control of each power supply unit 221.
  • the signal distribution unit may be an independent unit; it may also be integrated into the image processing system, that is, it is designed as an integrated design with the image processing system; it may also be integrated into the power supply system, that is, it is integrated with the power supply system. design.
  • the function of the signal distribution unit can be implemented by electrically connecting the image processing system 21 to each power supply unit 221.
  • the multiple power supply units 221 in the power supply system 22 all have a control signal input/loop output interface, and the control signal input/loop output interface of each power supply unit has the same function.
  • the image processing system 21 is directly electrically connected to the control signal input/loop output interface of one of the power supply units 221 to output the control signal, and the power supply unit 221 is defined as the first power supply unit, and there are multiple power supply units 221 in the power supply system 22
  • the electrical signal is connected in order to realize the sequential loop connection, and it is defined as the second power supply unit, the third power supply unit, etc., that is, the first power supply unit is connected to the The control signal input/loop output interface of the second power supply unit is electrically connected, and the second power supply unit is electrically connected with the control signal input/loop output interface of the third power supply unit through its control signal input/loop output interface, and so on.
  • the first power supply unit receives the control signal input from the image processing system 21 through the control signal input/loop-out interface, and while executing the control signal by itself, transmits the received control signal to the second power supply unit through its control signal input/loop-out interface.
  • the control signal input/loop-out interface of the power supply unit While the second power supply unit receives and executes the control signal, it transmits the received control signal to the control signal input/loop-out interface of the third power supply unit through its control signal input/loop-out interface.
  • the third power supply unit receives the control signal, and so on, until all the power supply units 221 receive the control signal, so as to realize the signal distribution of the control signal output by the image processing system 21.
  • the brightness information of the video image can directly correspond to the control signal, and the control signal is combined with the video image synchronization information to quickly and dynamically adjust the power drive current value to achieve rapid adjustment of the video image brightness to achieve different
  • the light and dark difference between the frame images improves the contrast of the video image, without analyzing the brightness information and power drive characteristics to obtain the required current value, and then obtain the corresponding control signal, which improves the efficiency of adjusting the brightness of the light source.
  • the power supply system 22 in the present application adopts a loop connection control method, which can realize the synchronous control of multiple power supply units 221; the loop connection control method can also realize that multiple power supply boards adopt the same circuit structure, and the power supply units 221 can share a common circuit structure.
  • the connection positions between the power supply units 221 can be interchanged, which saves cost and makes the connection method easier to operate.
  • the light source brightness adjustment system 20 of the present application is suitable for the brightness adjustment of light sources such as high-power LEDs or lasers.
  • FIG. 6 is a schematic structural diagram of an embodiment of an electronic device of the present application.
  • the processor 32 is configured to execute program instructions stored in the memory 31 to realize the brightness of the light source in any of the above embodiments. Adjustment method.
  • the electronic device 30 may include but is not limited to: a microcomputer and a server.
  • the electronic device 30 may also include mobile devices such as a notebook computer and a tablet computer, which are not limited herein.
  • the processor 32 is configured to control itself and the memory 31 to implement the steps of any of the foregoing light source brightness adjustment method embodiments.
  • the processor 32 may also be referred to as a CPU (Central Processing Unit, central processing unit).
  • the processor 32 may be an integrated circuit chip with signal processing capabilities.
  • the processor 32 can also be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (Field-Programmable Gate Array, FPGA), or other Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the processor 32 may be jointly implemented by an integrated circuit chip.
  • FIG. 7 is a schematic structural diagram of an embodiment of a device with a storage function according to the present application.
  • Another embodiment of the present application provides a computer-readable storage medium 40 with program data 41 stored thereon, and the program data 41 is executed by a processor to implement the light source brightness adjustment method of any of the foregoing embodiments.
  • the control signal is combined with the video image synchronization information to quickly and dynamically adjust the power supply drive current value, so as to realize the rapid adjustment of the video image brightness.
  • the disclosed method and device can be implemented in other ways.
  • the device implementation described above is only illustrative, for example, the division of modules or units is only a logical function division, and there may be other divisions in actual implementation, for example, units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of this embodiment.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium 40.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium 40 Among them, several instructions are included to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods in the various embodiments of the present application.
  • the aforementioned storage medium 40 includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc., which can store program code. medium.

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Abstract

光源亮度调节方法以及对应的系统、电子设备及可读存储介质，光源亮度调节方法包括：获取视频图像的亮度信息；在预制查询表内检索亮度信息，以确定与亮度信息匹配的控制信号，预制查询表包括多种亮度信息及分别对应的控制信号；利用控制信号控制电源系统输出与亮度信息匹配的电流值，以调节视频图像的光源亮度。通过设置预制查询表，视频图像的亮度信息可直接与控制信号对应，利用控制信号结合视频图像同步信息，快速动态调节电源驱动电流值，以实现视频图像亮度的快速调节，以实现不同帧图像之间的明暗差别，提高视频图像的对比度，提高光源亮度的调节效率。

Description

[根据细则37.2由ISA制定的发明名称]　光源亮度调节方法、系统、电子设备及计算机可读存储介质 技术领域
本申请属于光源调节技术领域，具体涉及光源亮度调节方法、系统、电子设备及装置。
背景技术
为了提升视频图像的对比度，可利用亮度调节技术对背光亮度进行调节。目前投影技术的不断创新突破和越来越低的实现成本，特别是激光投影机的逐步普及，部分用于家庭的大屏传统TV慢慢被激光投影机替代。现有技术中大功率LED或激光等光源配套的驱动电源和芯片方案处于滞后状态，光源亮度调节速度较慢。
发明内容
本申请提供光源亮度调节方法、系统、电子设备及装置，以解决光源亮度调节速度慢的问题。
为解决上述技术问题，本申请采用的一个技术方案是：一种光源亮度调节方法，包括：获取视频图像的亮度信息；在预制查询表内检索所述亮度信息，以确定与所述亮度信息匹配的控制信号，所述预制查询表包括多种亮度信息及分别对应的控制信号；利用所述控制信号控制电源系统输出与所述亮度信息匹配的电流值，以调节所述视频图像的光源亮度。
根据本申请一实施方式，在所述获取视频图像的亮度信息前，包括：获取多个样本图像的亮度信息；根据每个所述样本图像的所述亮度信息，确定与每个样本图像的所述亮度信息匹配的电流值；根据所述电流值，确定控制电源系统的控制信号；记录每个所述亮度信息对应的所述控制信号，得到所述预制查询表。
根据本申请一实施方式，所述控制信号为脉冲宽度调制信号。
根据本申请一实施方式，所述电源系统包括多个电源单元，多个所述电源单元环接，所述控制信号直接控制其中一个所述电源单元。
根据本申请一实施方式，所述利用所述控制信号控制电源系统输出与所述亮度信息匹配的电流值，包括：在当前帧视频图像显示结束前的第一预定时间内，向所述电源系统发出下一帧视频图像的控制信号；在所述当前帧视频图像显示完、且所述下一帧视频图像显示前，所述电源系统输出与所述下一帧视频图像的所述亮度信息匹配的电流值。
根据本申请一实施方式，所述在预制查询表内检索所述亮度信息，以确定与所述亮度信息匹配的控制信号，包括：判断所述预制查询表是否包括所述亮度信息；若所述预制查询表包括所述亮度信息，则根据所述预制查询表确定所述亮度信息对应的控制信号；若所述预制查询表不包括所述亮度信息，则根据所述亮度信息确定匹配的电流值，根据所述电流值确定控制电源系统的控制信号；同时将所述亮度信息和对应的所述控制信号记录于所述预制查询表中。
为解决上述技术问题，本申请采用的另一个技术方案是：一种光源亮度调节系统，包括相互耦接的图像处理系统和电源系统；
所述图像处理系统获取视频图像的亮度信息，并根据所述亮度信息检索预制查询表，以确定与所述亮度信息匹配的控制信号；所述图像处理系统利用所述控制信号控制电源系统输出与所述亮度信息匹配的电流值，以调节所述视频图像的光源亮度。
根据本申请一实施方式，所述光源亮度调节系统进一步包括信号分发单元，所述信号分发单元电联接在所述图像处理系统与电源系统之间，所述电源系统包括多个电源单元，所述多个电源单元包括一第一电源单元，所述图像处理系统通过所述信号分发单元将控制信号分发给每个所述电源单元；
所述信号分发单元为一个独立的单元，或所述信号分发单元与所述图像处理系统集成设计，或所述信号分发单元与所述电源系统集成设计。
根据本申请一实施方式，多个所述电源单元依次环接，所述多个电源单元均具有一控制信号输入/环出接口，所述多个电源单元通过所述控制信号输入/环出接口依次电信号连通，所述图像处理系统与所述第一电源单元的控制信号输入/环出接口电联接以输出控制信号，所述第一电源单元在接收并执行所述控制信号的同时，通过其控制信号输入/环出接口将接收的所述控制信号传输至下一个所述电源单元的控制信号输入/环出接口，从而实现对所述图像处理系统输出的所述控制信号进行信号分发。
为解决上述技术问题，本申请采用的又一个技术方案是：一种电子设备，包括相互耦接的存储器和处理器，所述处理器用于执行所述存储器中存储的程序指令，以实现上述任一所述的方法。
为解决上述技术问题，本申请采用的又一个技术方案是：一种具有存储功能的装置，所述装置存储有程序数据，所述程序数据能够被执行以实现上述任一所述的方法。
本申请的有益效果是：本申请通过设置预制查询表，视频图像的亮度信息可直接与控制信号对应，利用控制信号结合视频图像同步信息，快速动态调节电源驱动电流值，以实现视频图像亮度的快速调节，以实现不同帧图像之间的明暗差别，提高视频图像的对比度，无需再分析亮度信息和电源驱动特性得到所需的电流值，进而得到对应的控制信号，提高了光源亮度的调节效率。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图，其中：
图1是本申请的光源亮度调节方法一实施例的流程示意图；
图2是本申请的光源亮度调节方法一实施例中预制查询表的形成方法流程示意图；
图3是本申请的光源亮度调节方法一实施例中的预制查询表的示意图；
图4是本申请的光源亮度调节方法一实施例中双脉冲宽度调制信号的示意图；
图5是本申请的光源亮度调节系统一实施例的结构示意图；
图6是本申请的电子设备一实施例的结构示意图；
图7是本申请的具有存储功能的装置的一实施例的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
请参阅图1，图1是本申请的光源亮度调节方法一实施例的流程示意图。
本申请一实施例提供了一种光源亮度调节方法，包括如下步骤：
S11：获取视频图像的亮度信息。
图像处理系统获取视频图像的亮度信息，视频图像包括多帧连续的图像，亮度信息包括每帧图像的每个区域的光源的基色配比或白平衡配比等，光源包括三色光源或白光源。
S12：在预制查询表内检索亮度信息，以确定与亮度信息匹配的控制信号。
在预制查询表内检索该亮度信息，以确定与该亮度信息匹配的控制信号，预制查询表包括多种亮度信息及分别对应的控制信号。
预制查询表根据光源及电源驱动的特征预先计算并记录为查询表，预制查询表中，视频图像对应光源的亮度信息和所需的控制信号一一对应，并具有索引编号，进一步地，预制查询表内还可以包括亮度信息对应的电源系统的电流值。通过设置预制查询表，视频图像的亮度信息可 直接与控制信号对应，可快速动态调节光源亮度，以实现不同帧图像之间的明暗差别，提高视频图像的对比度，无需再分析亮度信息和电源驱动特性得到所需的电流值，进而得到对应的控制信号，提高了光源亮度的调节效率。
在一实施例中，在预制查询表内检索亮度信息，以确定与亮度信息匹配的控制信号包括：
判断预制查询表是否包括该亮度信息；
若预制查询表包括该亮度信息，则根据预制查询表确定亮度信息对应的控制信号；
若预制查询表中不包括该亮度信息，则根据亮度信息确定匹配的电流值，根据电流值确定控制电源系统的控制信号，同时将亮度信息和对应的控制信号记录于预制查询表，在其他实施例中，预制查询表还可以包括亮度信息对应的电流值。从而可不断确定亮度信息对应的控制信号，并不断更新预制查询。
在其他实施例中，还可以将该亮度信息根据预制查询表内已记录的相近的亮度信息，推算出对应的控制信号。
在一实施例中，请参阅图2和图3，图2是本申请的光源亮度调节方法一实施例中预制查询表的形成方法流程示意图；图3是本申请的光源亮度调节方法一实施例中的预制查询表的示意图。
在获取视频图像的亮度信息前，预制查询表的形成方法包括如下步骤：
S121：获取多个样本图像的亮度信息。
形成预制查询表时采用的样本图像可以是本实施例中的视频图像，或者采用其他图像。多个样本图像具有多种亮度信息，亮度信息包括每帧图像的每个区域的光源的基色配比或白平衡配比等，样本图像越多，预制查询表越详细。
需要说明的是，同一光源或者同类型光源可用同一个预制查询表。
S122：根据每个样本图像的亮度信息，确定与每个样本图像的亮度信息匹配的电流值。
根据每个样本图像的亮度信息，确定每个样本图像的亮度信息匹配的光源所需电流值。
S123：记录每个亮度信息对应的控制信号，得到预制查询表。
记录光源的每个亮度信息对应所需的控制信号，进一步地，还可以记录每个亮度信息对应的电流值。将光源的亮度信息、电源系统的电流值和图像处理系统输出的控制信号一一对应后记录形成预制查询表，并具有索引编号。
S13：利用控制信号控制电源系统输出与亮度信息匹配的电流值，以调节视频图像的光源亮度。
图像处理系统利用控制信号控制电源系统输出与亮度信息匹配的电流值，以调节视频图像的光源亮度。
根据电源系统的微控制单元(MCU)的识别机制，结合快速的控制方式，确定控制信号为脉冲宽度调制信号(PWM)，进一步地，控制信号为多脉冲控制方式，该方式具有快速调节的特点。图像处理系统通过向电源系统输送不同占空比的PWM，以达到电源系统输出不同电流值的目的。
多脉冲控制方式的PWM占空比计算为：
PWM＝sum(T1,T3,…Tn-1)/sum(T1,T2,…,Tn)
或者是PWM＝avg(PWM1,PWM2,…PWMn/2)
优选地，控制信号为双脉冲控制方式，以下以双脉冲控制方式来具体说明PWM占空比计算。
请参阅图4，图4是本申请的光源亮度调节方法一实施例中双脉冲宽度调制信号的示意图。
MCU根据PWM的第1个上升沿进行中断，并开始计时到第1个下降沿结束，记为T 1，此时为高电平；同时从第1个下降沿开始计时到第2个上升沿，记为T 2此时为低电平；从第2个上升沿开始到第2个下降沿，记为T 3，此时为高电平。T 3可用于验算和纠正T 1，理论上T 3与T 1相等。
PWM占空比计算为：PWM＝T 1/(T 1+T 2)
例如，T 1＝10μs，T 2＝23.3μs，PWM＝T 1/(T 1+T 2)＝0.3
在一实施例中，利用所述控制信号控制电源系统输出与所述亮度信息匹配的电流值包括：
在当前帧视频图像显示结束前的第一预定时间内，向电源系统发出下一帧视频图像的控制信号，第一预定时间可以根据电源响应速度以及图像刷新率等方面综合评估得出。具体地，第一预定时间可以为100μs。
在当前帧视频图像显示完、且下一帧视频图像显示前，电源系统输出与亮度信息匹配的电流值，从而调节下一帧视频图像的亮度，以实现不同帧图像之间的明暗差别，提高视频图像的对比度。具体地，当前帧图像与下一帧图像之间具有300μs的间隔时间。
具体地，当前帧视频图像与下一帧视频图像之间的间隔时间为300μs，在下一帧视频图像显示前的400μs，图像处理系统开始向电源系统发送控制信号，在下一帧视频图像显示前的300μs，此时当前帧视频图像显示完，电源系统响应控制信号，开始调整电流值，电流将在300μs内调整到位。
一般情况下，每帧视频图像在播放前，电源系统已经响应控制信号，并输出对应的电流值，进行亮度调节。若每帧视频图像显示结束前100us内，仍未响应当前帧视频图像对应的控制信号，则当前帧视频图像不再进行对应亮度调节，而开始进行下一帧视频图像的亮度调节。
在一实施例中，在当前帧视频图像显示时，图像处理系统获取下一帧视频图像的亮度信息，并确定下一帧视频图像的控制信号。在其他实施例中，还可以在视频图像显示前，预先获取整体的亮度信息，并预先确定视频图像的所有图像的控制信号，控制信号可以与每帧视频图像的播放时间对应。
在一实施例中，光源亮度调节系统进一步包括信号分发单元，信号分发单元电联接在所述图像处理系统与电源系统之间，电源系统包括多个电源单元，控制信号通过信号分发单元分发给每个电源单元，以实现对每个电源单元的控制。
所述信号分发单元可以为一个独立的单元；也可以集成于所述图像 处理系统中，即与所述图像处理系统一体设计；也可以集成于所述电源系统中，即与所述电源系统一体设计。
可选地，信号分发单元的功能也可以通过图像处理系统与每个电源单元电连接的方式实现。
具体地，图像处理系统可将控制信号直接输入至与其电连接的其中一个电源单元，电源系统中的多个电源单元依次环接，使得多个电源单元可同时响应控制信号的快速调制。具体信号传输过程如下：电源系统中的多个电源单元均具有一控制信号输入/环出接口，各电源单元的控制信号输入/环出接口功能相同。所述图像处理系统与其中一个电源单元的控制信号输入/环出接口直接电联接以输出控制信号，将该电源单元定义为第一电源单元，其他多个电源单元通过所述控制信号输入/环出接口依次电信号连通，且依次定义为第二电源单元、第三电源单元等，即第一电源单元通过其控制信号输入/环出接口与第二电源单元的控制信号输入/环出接口电联接，第二电源单元通过其控制信号输入/环出接口与第三电源单元的控制信号输入/环出接口电联接，以此类推。第一电源单元接收控制信号，在自身执行所述控制信号的同时，通过其控制信号输入/环出接口将接收的控制信号传输至第二电源单元的控制信号输入/环出接口，第二电源单元接收并执行所述控制信号的同时，通过其控制信号输入/环出接口将接收的控制信号传输至第三电源单元的控制信号输入/环出接口，第三电源单元接收控制信号，依次类推，直至所有电源单元接收控制信号，从而实现对所述图像处理系统输出的所述控制信号进行信号分发。通过采用环接控制的方式，多个电源单元可同时响应控制信号的快速调制；除此之外，环接控制的方式还可以实现多个电源板采用相同的电路结构，电源单元可共用一套模具，电源单元之间连接位置可以互换，节约成本且连接方式更易操作。
本申请通过设置预制查询表，视频图像的亮度信息可直接与控制信号对应，利用PWM控制信号，结合视频图像同步信息，快速动态调节电源驱动电流值，以实现视频图像亮度的快速调节。且本申请中的电源系统采用环接控制的方式，可实现多个电源单元的同步控制，本申请的 光源亮度调节方法适用于大功率LED或者激光等光源的亮度调节。
请参阅图5，图5是本申请的光源亮度调节系统一实施例的结构示意图。
本申请又一实施例提供了一种光源亮度调节系统20，包括相互耦接的图像处理系统21和电源系统22。其中，图像处理系统21获取视频图像的亮度信息，并根据亮度信息检索预制查询表，以确定与亮度信息匹配的控制信号。图像处理系统21利用控制信号控制电源系统22输出与亮度信息匹配的电流值，以调节视频图像的光源亮度。
光源亮度调节系统20进一步包括信号分发单元，信号分发单元电联接在所述图像处理系统21与电源系统22之间，电源系统22包括多个电源单元221，控制信号通过信号分发单元分发给每个电源单元221，以实现对每个电源单元221的控制。
所述信号分发单元可以为一个独立的单元；也可以集成于所述图像处理系统中，即与所述图像处理系统一体设计；也可以集成于所述电源系统中，即与所述电源系统一体设计。
可选地，在本实施例中，信号分发单元的功能可以通过图像处理系统21与每个电源单元221电连接的方式实现。
在一具体实施方式中，电源系统22中的多个电源单元221均具有一控制信号输入/环出接口，各电源单元的控制信号输入/环出接口功能相同。所述图像处理系统21与其中一个电源单元221的控制信号输入/环出接口直接电联接以输出控制信号，将该电源单元221定义为第一电源单元，电源系统22中的多个电源单元221通过所述控制信号输入/环出接口依次电信号连通实现依次环接，且依次定义为第二电源单元、第三电源单元等，即第一电源单元通过其控制信号输入/环出接口与第二电源单元的控制信号输入/环出接口电联接，第二电源单元通过其控制信号输入/环出接口与第三电源单元的控制信号输入/环出接口电联接，以此类推。第一电源单元通过控制信号输入/环出接口接收图像处理系统21输入的控制信号，在自身执行所述控制信号的同时，通过其控制信号输入/环出接口将接收的控制信号传输至第二电源单元的控制信号输入/环 出接口，第二电源单元接收并执行所述控制信号的同时，通过其控制信号输入/环出接口将接收的控制信号传输至第三电源单元的控制信号输入/环出接口，第三电源单元接收控制信号，依次类推，直至所有电源单元221接收控制信号，从而实现对所述图像处理系统21输出的所述控制信号进行信号分发。
本申请通过设置预制查询表，视频图像的亮度信息可直接与控制信号对应，并利用控制信号结合视频图像同步信息，快速动态调节电源驱动电流值，以实现视频图像亮度的快速调节，以实现不同帧图像之间的明暗差别，提高视频图像的对比度，无需再分析亮度信息和电源驱动特性得到所需的电流值，进而得到对应的控制信号，提高了光源亮度的调节效率。且本申请中的电源系统22采用环接控制的方式，可实现多个电源单元221的同步控制；环接控制的方式还可以实现多个电源板采用相同的电路结构，电源单元221可共用一套模具，电源单元221之间连接位置可以互换，节约成本且连接方式更易操作。本申请的光源亮度调节系统20适用于大功率LED或者激光等光源的亮度调节。
请参阅图6，图6是本申请的电子设备一实施例的结构示意图。
本申请又一实施例提供了一种电子设备30，包括相互耦接的存储器31和处理器32，处理器32用于执行存储器31中存储的程序指令，以实现上述任一实施例的光源亮度调节方法。在一个具体的实施场景中，电子设备30可以包括但不限于：微型计算机、服务器，此外，电子设备30还可以包括笔记本电脑、平板电脑等移动设备，在此不做限定。具体而言，处理器32用于控制其自身以及存储器31以实现上述任一光源亮度调节方法实施例的步骤。处理器32还可以称为CPU(Central Processing Unit，中央处理单元)。处理器32可能是一种集成电路芯片，具有信号的处理能力。处理器32还可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现场可编程门阵列(Field-Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。通用处理器可以是微处理器或者该处理器也可以是任何 常规的处理器等。另外，处理器32可以由集成电路芯片共同实现。
请参阅图7，图7是本申请的具有存储功能的装置的一实施例的结构示意图。
本申请又一实施例提供了一种计算机可读存储介质40，其上存储有程序数据41，程序数据41被处理器执行时实现上述任一实施例的光源亮度调节方法。本申请通过利用控制信号结合视频图像同步信息，快速动态调节电源驱动电流值，以实现视频图像亮度的快速调节。
在本申请所提供的几个实施例中，应该理解到，所揭露的方法和装置，可以通过其他的方式实现。例如，以上所描述的装置实施方式仅仅是示意性的，例如，模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性、机械或其他的形式。
作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施方式方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质40中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质40中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施方式方法的全部或部分步骤。而前述 的存储介质40包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述仅为本申请的实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (11)

  1. 一种光源亮度调节方法，其特征在于，包括：
    获取视频图像的亮度信息；
    在预制查询表内检索所述亮度信息，以确定与所述亮度信息匹配的控制信号，所述预制查询表包括多种亮度信息及分别对应的控制信号；
    利用所述控制信号控制电源系统输出与所述亮度信息匹配的电流值，以调节所述视频图像的光源亮度。
  2. 根据权利要求1所述的方法，其特征在于，在所述获取视频图像的亮度信息前，包括：
    获取多个样本图像的亮度信息；
    根据每个所述样本图像的所述亮度信息，确定与每个样本图像的所述亮度信息匹配的电流值；
    根据所述电流值，确定控制电源系统的控制信号；
    记录每个所述亮度信息对应的所述控制信号，得到所述预制查询表。
  3. 根据权利要求1所述的方法，其特征在于，所述控制信号为脉冲宽度调制信号。
  4. 根据权利要求1所述的方法，其特征在于，所述电源系统包括多个电源单元，多个所述电源单元环接，所述控制信号直接控制其中一个所述电源单元。
  5. 根据权利要求1所述的方法，其特征在于，所述利用所述控制信号控制电源系统输出与所述亮度信息匹配的电流值，包括：
    在当前帧视频图像显示结束前的第一预定时间内，向所述电源系统发出下一帧视频图像的控制信号；
    在所述当前帧视频图像显示完、且所述下一帧视频图像显示前，所述电源系统输出与所述下一帧视频图像的所述亮度信息匹配的电流值。
  6. 根据权利要求1所述的方法，其特征在于，所述在预制查询表内检索所述亮度信息，以确定与所述亮度信息匹配的控制信号，包括：
    判断所述预制查询表是否包括所述亮度信息；
    若所述预制查询表包括所述亮度信息，则根据所述预制查询表确定所述亮度信息对应的控制信号；
    若所述预制查询表不包括所述亮度信息，则根据所述亮度信息确定匹配的电流值，根据所述电流值确定控制电源系统的控制信号；
    同时将所述亮度信息和对应的所述控制信号记录于所述预制查询表中。
  7. 一种光源亮度调节系统，其特征在于，包括相互耦接的图像处理系统和电源系统；
    所述图像处理系统获取视频图像的亮度信息，并根据所述亮度信息检索预制查询表，以确定与所述亮度信息匹配的控制信号；
    所述图像处理系统利用所述控制信号控制电源系统输出与所述亮度信息匹配的电流值，以调节所述视频图像的光源亮度。
  8. 根据权利要求7所述的系统，其特征在于，所述光源亮度调节系统进一步包括信号分发单元，所述信号分发单元电联接在所述图像处理系统与电源系统之间，所述电源系统包括多个电源单元，所述多个电源单元包括一第一电源单元，所述图像处理系统通过所述信号分发单元将控制信号分发给每个所述电源单元；
    所述信号分发单元为一个独立的单元，或所述信号分发单元与所述图像处理系统集成设计，或所述信号分发单元与所述电源系统集成设计。
  9. 根据权利要求8所述的系统，其特征在于，所述多个电源单元均具有一控制信号输入/环出接口，所述多个电源单元通过所述控制信号输入/环出接口依次电信号连通，所述图像处理系统与所述第一电源单元的控制信号输入/环出接口电联接以输出控制信号，所述第一电源单元在接收并执行所述控制信号的同时，通过其控制信号输入/环出接口将接收的所述控制信号传输至下一个所述电源单元的控制信号输入/环出接口，从而实现对所述图像处理系统输出的所述控制信号进行信号分发。
  10. 一种电子设备，其特征在于，包括相互耦接的存储器和处理器，所述处理器用于执行所述存储器中存储的程序指令，以实现权利要求1至6中任一项所述的方法。
  11. 一种计算机可读存储介质，其上存储有程序数据，其特征在于，所述程序数据被处理器执行时实现权利要求1至6中任一项所述的方法。
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