CN116453457B - Color correction method and system for LED display screen - Google Patents
Color correction method and system for LED display screen Download PDFInfo
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- 238000007405 data analysis Methods 0.000 claims abstract description 51
- 230000000694 effects Effects 0.000 claims abstract description 49
- 238000004088 simulation Methods 0.000 claims abstract description 42
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- 230000007613 environmental effect Effects 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 3
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- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
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- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention relates to the technical field of LED display screens, in particular to a method and a system for correcting color correction of an LED display screen, comprising the following steps: the information acquisition unit is used for detecting environment influence information of a target screen use scene; the data analysis unit is used for determining the screen color temperature of the target screen according to the degree of change of the light source color temperature and determining the environment influence period according to the area of the illumination influence area of the scene used by the target screen; the simulation detection unit is connected with the data analysis unit and is used for carrying out illumination detection and temperature detection on the target screen according to the instruction information of the data analysis unit; the deviation correcting strategy generating unit is used for determining the target screen working parameter adjustment quantity of the corresponding environment influence period according to the display effect parameters of the target screen so as to generate an illumination control strategy and generating a target screen temperature compensation strategy according to the brightness of the target screen at different detection temperatures; the accuracy and the practicability of the color deviation correcting strategy are improved.
Description
Technical Field
The invention relates to the technical field of LED display screens, in particular to a method and a system for correcting color correction of an LED display screen.
Background
The LED screen is a display screen composed of LEDs, and can display various contents such as images, characters, videos and the like. The LED screen is common in occasions such as outdoor advertisements, stadiums, stage performances and commercial exhibition, has the advantages of high brightness, bright color, long service life, high definition and the like, but the LED screen is easily influenced by surrounding natural light sources or artificial light sources, so that the color display effect is poor, in order to ensure the display effect of the LED screen, the selection and adjustment are required according to practical conditions, for example, the brightness and the color saturation of the LED screen can be increased under strong illumination so as to adapt to the influence of the strong illumination, the brightness and the color saturation of the LED screen can be reduced under low illumination so as to ensure the definition and the visibility of pictures, and an automatic working parameter is generally adopted for controlling the large-scale LED screen, but how to enable an automatic control strategy to meet the working scene is the problem to be solved by people at present.
Chinese patent publication No. CN112489592a discloses an automatic color adjusting system for LED display screen, comprising: a light intensity sensing unit for sensing the intensity of external ambient light and converting it into a digital signal; the light color control unit is used for calculating external environment light color parameters according to the digital signals and is connected with the light intensity sensing unit; an image color processing unit for adjusting an image color parameter according to the external ambient light intensity, the image color processing unit being connected with a light color control unit; the correcting unit is used for adjusting the color level according to the preset light level parameter range in the image color processing unit, is connected with the image color processing unit, and can automatically adjust the color of the image displayed by the LED display screen according to the intensity of external ambient light, so that the color of the image of the display screen is consistent with the color of ambient light. It follows that the technical solution has the following problems: the correction unit in the technical scheme realizes color level adjustment by adopting the following steps: s1, calculating the variation of the ambient light intensity according to the historical data of the ambient light intensity and the ambient light intensity acquired at the time; s2, judging whether the variation in S1 is in a preset range, and when the variation is not in the preset range, adjusting the pixel lamp current according to the gamma correction table and the image color parameters. But in practical application, illumination angle, illumination area and ambient light source colour temperature all can influence the display effect of LED screen, technical scheme is difficult to guarantee the precision of LED display screen colour adjustment to lead to the system to adjust inefficiency.
Disclosure of Invention
Therefore, the invention provides a color correction system and a method for an LED display screen, which are used for solving the problem that in the prior art, the adjustment efficiency of the correction system is poor because a corresponding color correction strategy is difficult to generate according to the actual application scene of the LED screen.
In order to achieve the above object, the present invention provides a color correction system for an LED display screen, including:
the information acquisition unit is used for detecting environment influence information of a target screen usage scene, and comprises a light source color temperature, a light irradiation angle, an illumination influence area and a usage field Jing Wendu, wherein the light source color temperature and the light irradiation angle influence light rays;
the data analysis unit is connected with the information acquisition unit and is used for determining the type of the screen color temperature of the target screen according to the change degree of the light source color temperature of the influence light of the use scene of the target screen, determining the environment influence period and the corresponding environment light influence information according to the area of the illumination influence area of the use scene of the target screen, and determining the illumination detection times of the simulation detection unit for the target screen according to the number of the environment influence periods;
the simulation detection unit is connected with the data analysis unit and is used for carrying out illumination detection and temperature detection on the target screen according to the instruction information of the data analysis unit;
and the deviation correcting strategy generating unit is connected with the data analyzing unit and the simulation detecting unit and is used for determining the target screen working parameter adjustment quantity of the corresponding environment influence period according to the display effect parameter of the target screen so as to generate an illumination control strategy and generating a target screen temperature compensation strategy according to the brightness of the target screen at different detection temperatures.
Further, the data analysis unit determines the type of the screen color temperature of the target screen according to the degree of change of the light source color temperature of the target screen using scene, which affects the light rays;
if the change degree is in a first preset change degree range, the data analysis unit judges that the screen color temperature of the target screen adopts a fixed screen color temperature;
if the change degree is in a second preset change degree range, the data analysis unit judges that the screen color temperature of the target screen adopts an adjustable screen color temperature;
wherein the degree of change is related to a value of change in the color temperature of the light source affecting the light within a single detection period.
Further, the data analysis unit extracts the area of the illumination influence area of the target screen usage scene in each detection period under the first data analysis condition and determines the environment influence period according to the illumination influence area;
if the area of the illumination influence area is larger than the area of the preset illumination influence area, the detection period is recorded as an environment influence period, and the environment influence information corresponding to the environment influence period is recorded as environment light influence information;
the first data analysis condition is that the degree of change is in a second preset degree of change range.
Further, the data analysis unit determines the number of times of illumination detection of the simulation detection unit for the target screen according to the number of environmental impact periods under the second data analysis condition;
wherein the second data analysis condition is that there is an environmental impact period.
Further, the simulation detection unit performs illumination detection on the target screen under a first simulation detection condition, the illumination intensity of the ith illumination detection and the light intensity of the corresponding ith environment influence period are in a positive correlation relationship, the illumination angle of the ith illumination detection and the illumination angle of the target screen using scene light of the corresponding ith environment influence period are the same, and i=1, 2,3, … …, n and n are total times of illumination detection;
the first simulation detection condition is that the illumination detection times aiming at the target screen are determined.
Further, the deviation correcting strategy generating unit calculates the display effect parameter of the target screen when the simulation detecting unit detects single illumination, records the effect parameter difference value between the display effect parameter and the preset adjustment effect parameter when the display effect parameter is in the preset adjustment parameter range, and determines the target screen working parameter adjustment quantity of the corresponding environment influence period according to the effect parameter difference value;
the display effect parameters are calculated according to the brightness, contrast and color saturation of the target screen, and the target screen working parameters comprise the brightness, contrast and color saturation of the target screen.
Further, the deviation rectifying strategy generating unit controls the simulation detecting unit to detect the temperature of the target screen for u times, under single temperature detection, the simulation detecting unit detects the brightness of the target screen with the preset temperature detection duration when the target screen works at the u-th detection temperature, and generates a temperature change curve graph, wherein the temperature change curve is a temperature change curve reflected on a two-dimensional coordinate system, the abscissa of the two-dimensional coordinate system is the detection temperature, the ordinate of the two-dimensional coordinate system is the brightness of the target screen, u=1, 2,3, … … and umax, the value of umax is related to the use scene temperature range of the target screen input by the input end, umax and the size of the use scene temperature range are in positive correlation, and umax is the total number of temperature detection.
Further, the deviation rectifying strategy generating unit marks the brightness of the target screen at the preset working environment temperature of the target screen as the brightness of the target screen under the preset working condition, calculates the difference value between the brightness of each point of the target screen on the change curve of the brightness change graph and the brightness of the preset working target screen, marks the temperature corresponding to the change curve with the difference value larger than the preset difference value range as a first constant temperature range, and marks the temperature corresponding to the change curve with the difference value smaller than the preset difference value range as a second constant temperature range.
Further, the deviation rectification strategy generating unit generates a target screen temperature compensation strategy, including:
when the environment temperature is in a first constant temperature range, the target screen executes heat preservation adjustment, and if the target screen is in an environment influence period at the moment, the working parameter adjustment quantity of the target screen is reduced;
and when the ambient temperature is in the second constant temperature range, the target screen executes cooling adjustment, and if the target screen is in the environment influence period at the moment, the working parameter adjustment quantity of the target screen is increased.
The invention also provides a color correction method of the LED display screen, which comprises the following steps:
the data analysis unit determines an environment influence period and corresponding environment light influence information according to the area of the illumination influence area of the target screen usage scene in each detection period;
the data analysis unit determines the illumination detection times of the simulation detection unit aiming at the target screen according to the number of environmental impact periods;
the simulation detection unit carries out n times of illumination detection on the target screen, and determines illumination intensity of the ith illumination detection according to the light intensity of the ith environmental influence period;
the deviation correcting strategy generating unit determines the target screen working parameter adjustment quantity of the corresponding environment influence period according to the difference value between the display effect parameter of the target screen during illumination detection and the effect parameter of the preset adjustment display effect parameter, and marks the target screen working parameter adjustment quantity as an illumination control strategy;
the deviation correcting strategy generating unit controls the simulation detecting unit to detect the temperature of the target screen for a plurality of times, and generates a target screen temperature compensation strategy according to the brightness of the target screen at different detection temperatures;
where i=1, 2,3, … …, n, n is the total number of light detection.
Compared with the prior art, the color correction adjustment system has the beneficial effects that the information acquisition unit is used for acquiring information of the target screen usage scene before the target screen usage scene is put into use, and the data analysis unit is used for analyzing and processing according to the environmental impact information of the target screen usage scene, so that the illumination detection and the temperature detection of the simulation detection unit are more in line with the actual application situation of the target screen, the accuracy of the illumination control strategy and the temperature compensation strategy generated by the correction strategy generation unit is further improved, and the accuracy of the color correction adjustment is further improved.
Further, the data analysis unit determines the type of the screen color temperature of the target screen according to the degree of change of the light source color temperature of the influence light of the use scene of the target screen, and the production consumption of the target screen is reduced while the display effect is ensured because the influence degree of the light source color temperature of the influence light is stable due to the adoption of the light source color temperature of the influence light in the environment.
Further, in the invention, if the area of the illumination influence area is larger than the area of the preset illumination influence area, the detection period is recorded as an environment influence period, and the environment influence information corresponding to the environment influence period is recorded as environment light influence information, so that the problem of overlarge power loss of the display screen caused by misjudgment of the system on color adjustment when the light influence degree in the use environment is low is avoided.
Further, the data analysis unit determines the number of times of illumination detection of the simulation detection unit on the target screen according to the number of environmental impact periods under the second data analysis condition, so that the detection precision of the simulation detection unit is improved, and the method and the device are more in line with actual working conditions.
Further, in the invention, the illumination intensity of the ith illumination detection and the light intensity of the corresponding ith environmental influence period are in positive correlation, the illumination angle of the ith illumination detection is the same as the illumination angle of the target screen using scene light of the corresponding ith environmental influence period, the detection precision of the simulation detection unit is improved, and the simulation detection unit is more in line with the actual working condition.
Furthermore, the deviation correction strategy generating unit generates the target screen temperature compensation strategy, and the influence of the temperature on the target screen is considered, so that the target screen working parameter adjustment quantity is compensated and adjusted, and the judgment precision of the invention is further improved.
Drawings
FIG. 1 is a block diagram of a color correction system for an LED display screen according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a color correction method for an LED display screen according to an embodiment of the present invention;
fig. 3 is a flowchart of determining a type of a screen color temperature of a target screen according to a degree of change of a light source color temperature according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 to 3, the present invention provides a color correction system for an LED display screen, including:
the information acquisition unit is used for detecting environment influence information of a target screen usage scene, and comprises a light source color temperature, a light irradiation angle, an illumination influence area and a usage field Jing Wendu, wherein the light source color temperature and the light irradiation angle influence light rays;
the data analysis unit is connected with the information acquisition unit and is used for determining the type of the screen color temperature of the target screen according to the change degree of the light source color temperature of the influence light of the use scene of the target screen, determining the environment influence period and the corresponding environment light influence information according to the area of the illumination influence area of the use scene of the target screen, and determining the illumination detection times of the simulation detection unit for the target screen according to the number of the environment influence periods;
the simulation detection unit is connected with the data analysis unit and is used for carrying out illumination detection and temperature detection on the target screen according to the instruction information of the data analysis unit;
and the deviation correcting strategy generating unit is connected with the data analyzing unit and the simulation detecting unit and is used for determining the target screen working parameter adjustment quantity of the corresponding environment influence period according to the display effect parameter of the target screen so as to generate an illumination control strategy and generating a target screen temperature compensation strategy according to the brightness of the target screen at different detection temperatures.
Specifically, the data analysis unit determines the type of the screen color temperature of the target screen according to the degree of change of the light source color temperature of the target screen usage scene, which affects the light rays;
if the change degree is in a first preset change degree range, the data analysis unit judges that the screen color temperature of the target screen adopts a fixed screen color temperature;
if the change degree is in a second preset change degree range, the data analysis unit judges that the screen color temperature of the target screen adopts an adjustable screen color temperature;
wherein the degree of change is related to a value of change in the color temperature of the light source affecting the light within a single detection period.
Wherein, a single detection period is 1h.
The calculation formula of the change degree S is as follows:
，
wherein, the liquid crystal display device comprises a liquid crystal display device,xc is the light source color temperature which is detected by the information acquisition unit of the c-th change degree detection period and affects the light, and cmax is the total number of the change degree detection periods;
specifically, the influence of the color temperature of the light source affecting the scene of the target screen on the LED screen is mainly reflected in the color reduction effect, the brightness and contrast of the LED screen and the consistency of the color temperature, and it should be noted that the application scenes and the requirements of different LED screens are different, so that when designing and using the LED screen, the LED screen needs to be selected and adjusted according to the actual requirements and the use scenes so as to achieve the best effect and performance. Meanwhile, attention is also paid to the change and influence of natural light in the environment to ensure the stability and reliability of the LED screen. Therefore, the type of the screen color temperature of the target screen is determined according to the degree of change of the light source color temperature of the target screen usage scene, which affects the light rays, so that the type of the screen color temperature of the target screen is more in line with an actual working scene;
the value of the preset change degree range can be obtained through experiments, namely, a user can determine the influence degree of different light source color temperatures on color display of the target screen image according to experiments and historical technology experience, record the light source color temperature of the target screen, which is not distorted, calculate the corresponding change degree, record the light source color temperature as a first preset change degree range, and record a numerical value larger than the first preset change degree range as a second preset change degree range.
The information acquisition unit includes: the light angle meter is used for detecting the light irradiation angle affecting light;
when the light angle meter is used, the light angle meter needs to be placed on a plane to be installed of a use scene of the target screen, and the illumination angle of the plane is determined according to the indication of equipment; the spectrum analyzer, an instrument for measuring the wavelength and intensity of light, can decompose the light into different wavelengths to determine the spectral distribution of the light source. Calculating the color temperature of the light source by measuring the spectral distribution of the light source; the visual identification device is used for detecting the area of the illumination influence area on the plane to be installed of the use scene of the target screen; and the temperature detection device is used for detecting the use scene temperature of the target screen.
Specifically, the data analysis unit extracts the area of the illumination influence area of the target screen usage scene in each detection period under the first data analysis condition and determines the environment influence period according to the illumination influence area;
if the area of the illumination influence area is larger than the area of the preset illumination influence area, the detection period is recorded as an environment influence period, and the environment influence information corresponding to the environment influence period is recorded as environment light influence information;
the first data analysis condition is that the degree of change is in a second preset degree of change range.
Specifically, the data analysis unit determines the number of times of illumination detection of the simulation detection unit for the target screen according to the number of environmental impact periods under the second data analysis condition;
wherein the second data analysis condition is that there is an environmental impact period.
The environment influence period reflects the corresponding working time of the color display of the target screen influenced by the environment, so that the illumination detection times are correspondingly determined according to the number of the environment periods, the detection result of the simulation detection unit is more in line with the actual working scene, and the judging efficiency of the invention is further improved.
Specifically, the simulation detection unit performs illumination detection on the target screen under a first simulation detection condition, the illumination intensity of the ith illumination detection and the light intensity of the corresponding ith environment influence period are in a positive correlation relationship, the illumination angle of the ith illumination detection and the illumination angle of the target screen using scene light of the corresponding ith environment influence period are the same, and i=1, 2,3, … …, n and n are the total times of illumination detection;
the first simulation detection condition is that the illumination detection times aiming at the target screen are determined.
Specifically, in order to ensure the detection precision of the simulation detection unit, the illumination intensity of the ith illumination detection and the light intensity of the corresponding ith environmental impact period are in a positive correlation relationship, and the illumination angle of the ith illumination detection and the illumination angle of the corresponding target screen using scene light of the ith environmental impact period are the same, so that the detection parameters of the simulation detection unit are more in line with the actual working scene, and the working parameters detected each time are specific to the environmental impact period of the target screen, thereby improving the judgment precision of the invention.
Specifically, the deviation correcting strategy generating unit calculates the display effect parameter of the target screen when the simulation detecting unit detects single illumination, records the effect parameter difference value between the display effect parameter and the preset adjustment effect parameter when the display effect parameter is in the preset adjustment parameter range, and determines the target screen working parameter adjustment quantity of the corresponding environment influence period according to the effect parameter difference value;
the display effect parameters are calculated according to the brightness, contrast and color saturation of the target screen, and the target screen working parameters comprise the brightness, contrast and color saturation of the target screen.
The calculation formula of the display effect parameter K is as follows:
K＝（W1/W10）×α1＋（W2/W20）×α2＋（W3/W30）×α3
wherein, W1 is the brightness of the target screen, W10 is the preset screen brightness, W2 is the contrast of the target screen, W20 is the preset contrast, W3 is the color saturation of the target screen, W30 is the preset color saturation, alpha 1 is the first preset weight coefficient, alpha 2 is the second preset weight coefficient, alpha 3 is the third preset weight coefficient, wherein, the values of W10, W20 and W30 are determined by the user according to the brightness, contrast and color saturation of the target screen in the preset environment, and the display effect of the target screen cannot be influenced or the influence degree of the ambient light in the preset environment is within the allowable range of the user; the preset adjusting display effect parameter is 1, the preset adjusting parameter range can be determined according to the user requirement and the actual application scene, the preset adjusting parameter range comprises a first preset adjusting parameter range and a second preset adjusting parameter range, the value of the preset adjusting parameter range is provided, the display effect parameter in the first preset adjusting parameter range is larger than 2, the display effect parameter in the second preset adjusting parameter range is smaller than 0.05, and then the display effect parameter is in the preset adjusting parameter range; the illumination control strategy is to record the target screen working parameter adjustment quantity corresponding to each environment influence period, the target screen working parameter adjustment quantity is delta W1, delta W2 and delta W3, wherein delta W1 is the adjustment quantity of brightness of a target screen, delta W2 is the adjustment quantity of contrast of the target screen and delta W3 is the adjustment quantity of target screen color saturation, and note that when the display effect parameter is in a first preset adjustment parameter range, delta W1, delta W2 and delta W3 are negative values, and when the display effect parameter is in a second preset adjustment parameter range, delta W1, delta W2 and delta W3 are positive values, and the values of delta W1, delta W2 and delta W3 are positive correlations with the effect parameter difference.
Specifically, the deviation rectification strategy generating unit controls the simulation detecting unit to detect the temperature of the target screen u times, under single temperature detection, the simulation detecting unit detects the brightness of the target screen with the preset temperature detection duration when the target screen works at the u-th detection temperature, and generates a temperature change curve graph, wherein the temperature change curve is a temperature change curve reflected on a two-dimensional coordinate system, the abscissa of the two-dimensional coordinate system is the detection temperature, the ordinate of the two-dimensional coordinate system is the brightness of the target screen, u=1, 2,3, … … and umax, the value of umax is related to the use scene temperature range of the target screen input by the input end, umax is in positive correlation with the size of the use scene temperature range, and umax is the total number of temperature detection.
Specifically, the deviation rectification strategy generating unit marks the brightness of the target screen at the preset working environment temperature of the target screen as the brightness of the target screen under the preset working condition, calculates the difference value between the brightness of each point of the target screen on the change curve of the brightness change graph and the brightness of the preset working target screen, marks the temperature corresponding to the change curve with the difference value larger than the preset difference value range as a first constant temperature range, and marks the temperature corresponding to the change curve with the difference value smaller than the preset difference value range as a second constant temperature range.
Wherein the target screen brightness under the preset working condition is in a target screen brightness change curve chart
Specifically, the deviation rectification strategy generating unit generates a target screen temperature compensation strategy, including:
when the environment temperature is in a first constant temperature range, the target screen executes heat preservation adjustment, and if the target screen is in an environment influence period at the moment, the working parameter adjustment quantity of the target screen is reduced;
and when the ambient temperature is in the second constant temperature range, the target screen executes cooling adjustment, and if the target screen is in the environment influence period at the moment, the working parameter adjustment quantity of the target screen is increased.
The invention also provides a color correction method of the LED display screen, which comprises the following steps:
the data analysis unit determines the type of the screen color temperature of the target screen according to the degree of change of the light source color temperature of the target screen using scene, which affects the light rays;
the data analysis unit determines an environment influence period and corresponding environment light influence information according to the area of the illumination influence area of the target screen usage scene in each detection period;
the data analysis unit determines the illumination detection times of the simulation detection unit aiming at the target screen according to the number of environmental impact periods;
the simulation detection unit carries out n times of illumination detection on the target screen, and determines illumination intensity of the ith illumination detection according to the light intensity of the ith environmental influence period;
the deviation correcting strategy generating unit determines the target screen working parameter adjustment quantity of the corresponding environment influence period according to the difference value between the display effect parameter of the target screen during illumination detection and the effect parameter of the preset adjustment display effect parameter, and marks the target screen working parameter adjustment quantity as an illumination control strategy;
and the deviation correcting strategy generating unit controls the simulation detecting unit to detect the temperature of the target screen for a plurality of times, and generates a target screen temperature compensation strategy according to the brightness of the target screen at different detection temperatures.
Examples: in this embodiment, the target screen for color correction of the correction system is an LED display screen, the display area of the target screen is 5 mm in pixel pitch, and the correction system is suitable for outdoor application, and the common screen size is 6×4 meters;
the working parameters of the system are set as follows:
the first preset change degree range [0, 100], the second preset change degree range is more than 100, and the units are Kelvin;
the duration of the detection period is 1h;
the preset screen brightness W10 is 5000cd/m, the preset contrast W20 is 2000:1, and the preset color saturation W30 is 75%.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A color correction system for an LED display screen, comprising:
the information acquisition unit is used for detecting environment influence information of a target screen usage scene, and comprises a light source color temperature, a light irradiation angle, an illumination influence area and a usage field Jing Wendu, wherein the light source color temperature and the light irradiation angle influence light rays;
the data analysis unit is connected with the information acquisition unit and is used for determining the type of the screen color temperature of the target screen according to the change degree of the light source color temperature of the influence light of the use scene of the target screen, determining the environment influence period and the corresponding environment light influence information according to the area of the illumination influence area of the use scene of the target screen, and determining the illumination detection times of the simulation detection unit for the target screen according to the number of the environment influence periods;
the simulation detection unit is connected with the data analysis unit and is used for carrying out illumination detection and temperature detection on the target screen according to the instruction information of the data analysis unit;
and the deviation correcting strategy generating unit is connected with the data analyzing unit and the simulation detecting unit and is used for determining the target screen working parameter adjustment quantity of the corresponding environment influence period according to the display effect parameter of the target screen so as to generate an illumination control strategy and generating a target screen temperature compensation strategy according to the brightness of the target screen at different detection temperatures.
2. The system according to claim 1, wherein the data analysis unit determines the type of the screen color temperature of the target screen according to the degree of change of the light source color temperature of the light affected by the scene of the target screen usage;
if the change degree is in a first preset change degree range, the data analysis unit judges that the screen color temperature of the target screen adopts a fixed screen color temperature;
if the change degree is in a second preset change degree range, the data analysis unit judges that the screen color temperature of the target screen adopts an adjustable screen color temperature;
wherein the degree of change is related to a value of change in the color temperature of the light source affecting the light within a single detection period.
3. The system according to claim 2, wherein the data analysis unit extracts the area of the illumination influence area of the target screen usage scene in each detection period under the first data analysis condition and determines the environmental influence period according to the illumination influence area;
if the area of the illumination influence area is larger than the area of the preset illumination influence area, the detection period is recorded as an environment influence period, and the environment influence information corresponding to the environment influence period is recorded as environment light influence information;
the first data analysis condition is that the degree of change is in a second preset degree of change range.
4. The color correction system of an LED display screen according to claim 3, wherein the data analysis unit determines the number of times of illumination detection of the analog detection unit for the target screen according to the number of environmental impact periods under the second data analysis condition;
wherein the second data analysis condition is that there is an environmental impact period.
5. The system according to claim 4, wherein the analog detecting unit performs illumination detection on the target screen under a first analog detecting condition, the illumination intensity of the ith illumination detection and the light intensity of the corresponding ith environmental impact period are in positive correlation, the illumination angle of the ith illumination detection and the illumination angle of the target screen using scene light of the corresponding ith environmental impact period are the same, and i=1, 2,3, … …, n, n is the total number of illumination detections;
the first simulation detection condition is that the illumination detection times aiming at the target screen are determined.
6. The system according to claim 5, wherein the deviation-correcting strategy generating unit calculates a display effect parameter of the target screen when the analog detecting unit detects light for a single time, records an effect parameter difference between the display effect parameter and a preset adjustment effect parameter when the display effect parameter is within a preset adjustment parameter range, and determines a target screen working parameter adjustment amount of a corresponding environmental influence period according to the effect parameter difference;
the display effect parameters are calculated according to the brightness, contrast and color saturation of the target screen, and the target screen working parameters comprise the brightness, contrast and color saturation of the target screen.
7. The system according to claim 6, wherein the deviation-correction-strategy generating unit controls the analog detecting unit to perform u-time temperature detection on the target screen, and under a single-time temperature detection, the analog detecting unit detects the brightness of the target screen, which is operated at the u-th detection temperature for a preset temperature detection duration, of the target screen, and generates a temperature change curve, wherein the temperature change curve is a temperature change curve reflected on a two-dimensional coordinate system, an abscissa of the two-dimensional coordinate system is the detection temperature, an ordinate of the two-dimensional coordinate system is the brightness of the target screen, u=1, 2,3, … …, umax, umax is a total number of temperature detections.
8. The system of claim 7, wherein the deviation-correction strategy generating unit marks the target screen brightness at the preset working environment temperature of the target screen as the target screen brightness of the preset working condition, calculates the difference between the target screen brightness of each point on the change curve in the brightness change curve and the target screen brightness of the preset working condition, marks the temperature corresponding to the change curve with the difference larger than the preset difference range as the first constant temperature range, and marks the temperature corresponding to the change curve with the difference smaller than the preset difference range as the second constant temperature range.
9. The LED display screen color correction system of claim 8, wherein said correction strategy generation unit generates a target screen temperature compensation strategy comprising:
when the environment temperature is in a first constant temperature range, the target screen executes heat preservation adjustment, and if the target screen is in an environment influence period at the moment, the working parameter adjustment quantity of the target screen is reduced;
and when the ambient temperature is in the second constant temperature range, the target screen executes cooling adjustment, and if the target screen is in the environment influence period at the moment, the working parameter adjustment quantity of the target screen is increased.
10. A method of color correction for an LED display screen of the system of any one of claims 1 to 9, comprising:
the data analysis unit determines the type of the screen color temperature of the target screen according to the degree of change of the light source color temperature of the target screen using scene, which affects the light rays;
the data analysis unit determines an environment influence period and corresponding environment light influence information according to the area of the illumination influence area of the target screen usage scene in each detection period;
the data analysis unit determines the illumination detection times of the simulation detection unit aiming at the target screen according to the number of environmental impact periods;
the simulation detection unit carries out n times of illumination detection on the target screen, and determines illumination intensity of the ith illumination detection according to the light intensity of the ith environmental influence period;
the deviation correcting strategy generating unit determines the target screen working parameter adjustment quantity of the corresponding environment influence period according to the difference value between the display effect parameter of the target screen during illumination detection and the effect parameter of the preset adjustment display effect parameter, and marks the target screen working parameter adjustment quantity as an illumination control strategy;
the deviation correcting strategy generating unit controls the simulation detecting unit to detect the temperature of the target screen for a plurality of times, and generates a target screen temperature compensation strategy according to the brightness of the target screen at different detection temperatures;
where i=1, 2,3, … …, n, n is the total number of light detection.
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