CN113611242B - LED screen correction coefficient generation method, LED screen correction coefficient adjustment method and LED screen correction system - Google Patents
LED screen correction coefficient generation method, LED screen correction coefficient adjustment method and LED screen correction system Download PDFInfo
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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
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
Abstract
The invention relates to the technical field of LED display, and particularly discloses a method for generating a correction coefficient of an LED screen, a method for adjusting the correction coefficient of the LED screen and an LED screen correction system, wherein the method for generating the correction coefficient of the LED screen comprises the following steps: sending a cold screen correction coefficient of the LED display screen to a receiving card; determining a temperature measurement area greatly influenced by temperature in the LED display screen; calculating display correction coefficients of temperature measurement areas at different temperatures; generating correction coefficient variation trend data of the LED display screen corresponding to the temperature according to the display correction coefficient and a preset variation trend generation strategy; and transmitting the correction coefficient change trend data to a receiving card. The invention realizes no difference of brightness and chroma of the whole LED display screen at different temperatures, solves the problems of color cast and uneven brightness of the display screen caused by temperature change in the actual use process, improves the correction effect, and also improves the display effect of the display screen; on the other hand, only one set of cold screen correction coefficient needs to be stored in the receiving card, so that the flash storage space of the receiving card is saved.
Description
Technical Field
The invention relates to the technical field of LED display, in particular to a method for generating and adjusting a correction coefficient of an LED screen and an LED screen correction system.
Background
In the LED display screen, the uneven temperature distribution of the screen body may cause the difference between the display brightness and the chromaticity in the display area of the screen portion, specifically because the original correction coefficient is not suitable for the current usage scenario of the LED display screen. The existing cold screen correction or hot screen correction technology is generally used, the cold screen correction is carried out, namely after a display screen starts to work, correction is carried out in a short time, the temperature of equipment does not obviously rise, the hot screen correction is carried out, under a specific temperature, for example, after a box body works for 15 minutes and generates heat, the temperature of the box body is measured to about 45 ℃, and the box body is corrected. In addition, in the prior art, after the box body with a specific temperature needs to be corrected, a correction coefficient under a specific environmental temperature is obtained and stored in a lamp panel or a memory of the control device. It is therefore necessary to determine the specific temperature and additionally to store a plurality of sets of correction coefficients for the specific environment.
Therefore, there is a need to find a new technical solution to solve the above problems.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an LED screen correction coefficient generation method, an LED screen correction coefficient adjustment method and an LED screen correction system.
The invention discloses a method for generating a correction coefficient of an LED screen, which comprises the following steps:
acquiring a cold screen correction coefficient of the LED display screen and issuing the cold screen correction coefficient to a receiving card;
determining a temperature measurement area greatly influenced by temperature in the LED display screen according to a preset LED display screen analysis strategy;
calculating display correction coefficients of temperature measurement areas at different temperatures according to a preset correction coefficient calculation strategy;
generating correction coefficient variation trend data of the LED display screen corresponding to the temperature according to the display correction coefficient and a preset variation trend generation strategy;
and transmitting the correction coefficient change trend data to a receiving card.
Further, according to a preset LED display screen analysis strategy, a temperature measurement area which is greatly influenced by temperature in the LED display screen is determined, and the method comprises the following steps:
acquiring corrected images displayed by an LED display screen at different temperatures;
and comparing and analyzing the plurality of corrected images to determine a temperature measurement area which is greatly influenced by the temperature in the LED display screen.
Further, calculating display correction coefficients of temperature measurement areas at different temperatures according to a preset correction coefficient calculation strategy, including:
calculating a display correction coefficient of the temperature measurement area at the corresponding temperature according to the correction image and a preset correction coefficient calculation strategy;
and repeating the previous step to obtain the display correction coefficients of the temperature measurement areas at all the temperatures.
Further, generating correction coefficient variation trend data of the LED display screen corresponding to the temperature according to the display correction coefficient and a preset variation trend generation policy, including:
acquiring display correction coefficients of temperature measurement areas at different temperatures;
correspondingly arranging display correction coefficients of the temperature measurement areas according to the sequence of gradually increasing from the initial temperature;
and generating correction coefficient variation trend data of the LED display screen according to the variation trend generation strategy.
Further, the correction coefficient variation trend data includes a data map of each lamp point of the LED display screen, the data map uses the temperature as an abscissa and the correction coefficient as an ordinate, and when the correction coefficient is a luminance correction coefficient, the data map includes a luminance correction coefficient corresponding to each of the R lamp, the G lamp, and the B lamp, and when the correction coefficient is a chromaticity correction coefficient, the data map includes three chromaticity correction coefficients corresponding to each of the R lamp, the G lamp, and the B lamp.
The invention also provides a method for adjusting the correction coefficient of the LED screen, which comprises the following steps:
collecting a cold screen correction coefficient of the LED display screen;
collecting correction coefficient variation trend data of the LED display screen corresponding to the temperature; the correction coefficient variation trend data is generated by an upper computer according to a display correction coefficient and a preset variation trend generation strategy, the display correction coefficient is obtained by calculating a temperature measurement area at different temperatures through the upper computer according to a preset correction coefficient calculation strategy, and the temperature measurement area comprises a temperature measurement area which is determined by the upper computer to be greatly influenced by temperature in an LED display screen according to a preset LED display screen analysis strategy;
receiving temperature data of the LED display screen;
dynamically adjusting display parameters of the LED display screen according to the temperature detection data, the cold screen correction coefficient and the correction coefficient variation trend data;
and sending the adjusted display parameters to the LED display screen.
The invention also provides a device for generating the LED screen correction coefficient, which comprises a cold screen correction coefficient acquisition module, a temperature measurement area determination module, a display correction coefficient generation module, a correction coefficient change trend generation module and a communication module, wherein:
the cold screen correction coefficient acquisition module is connected with the communication module and used for acquiring the cold screen correction coefficient of the LED display screen;
the temperature measurement area determining module is connected with the display correction coefficient generating module and used for determining a temperature measurement area which is greatly influenced by temperature in the LED display screen according to a preset LED display screen analysis strategy;
the display correction coefficient generation module is connected with the temperature measurement area determination module and the correction coefficient change trend generation module and is used for calculating the display correction coefficients of the temperature measurement areas at different temperatures according to a preset correction coefficient calculation strategy;
the correction coefficient variation trend generating module is connected with the display correction coefficient generating module and the communication module and used for generating correction coefficient variation trend data of the LED display screen corresponding to the temperature according to the display correction coefficient and a preset variation trend generating strategy;
and the communication module is connected with the correction coefficient change trend generation module and the cold screen correction coefficient acquisition module and is used for sending the cold screen correction coefficient and the correction coefficient change trend data to the receiving card.
The invention also provides an LED screen correction system, which comprises the correction coefficient generating device, a receiving card, an LED display screen, a camera and a temperature detection device, wherein:
the camera is in communication connection with the correction coefficient generation device and is used for receiving shooting control information sent by the correction coefficient generation device and shooting the LED display screen to obtain a corrected image;
the temperature detection device is in communication connection with the receiving card and is used for detecting the temperature of a temperature measurement area on the LED display screen and generating temperature detection data;
the correction coefficient generating device is in communication connection with the receiving card and the camera, and is used for sending shooting control information to the camera, acquiring a correction image and acquiring temperature detection data from the receiving card so as to generate correction coefficient change trend data of the LED display screen corresponding to the temperature; sending the cold screen correction coefficient and the correction coefficient variation trend data to a receiving card;
the receiving card is in communication connection with the LED display screen, the correction coefficient generating device and the temperature detecting device and is used for receiving temperature detection data, cold screen correction coefficients and correction coefficient change trend data; dynamically adjusting display parameters of the LED display screen according to the temperature detection data, the cold screen correction coefficient and the correction coefficient change trend data;
and the LED display screen is in communication connection with the receiving card and is used for receiving the adjusted display parameters and displaying the adjusted display parameters correspondingly.
Further, the correction system includes a plurality of LED display screens of the same specification, and with LED display screen quantity the same and a plurality of receiving card of corresponding connection, and a plurality of temperature-detecting device who corresponds with a plurality of LED display screen respectively, wherein:
the correction coefficient generation device selects one LED display screen from the plurality of LED display screens as a reference box body and sends shooting control information to the camera;
the camera receives shooting control information and shoots the reference box body to obtain a corrected image;
the correction coefficient generating device acquires a correction image, acquires temperature detection data from a receiving card connected with the reference box body, and generates correction coefficient change trend data of the reference box body corresponding to the temperature; sending the correction coefficient variation trend data to all receiving cards;
all the receiving cards receive temperature detection data corresponding to the temperature detection devices, and dynamically adjust display parameters corresponding to the LED display screen according to the temperature detection data, the cold screen correction coefficient and the correction coefficient variation trend data;
and all the LED display screens receive the adjusted display parameters respectively and perform corresponding display.
Further, the correction system includes a plurality of LED display screens of different specifications to and with LED display screen quantity the same and a plurality of receiving card of corresponding connection, and a plurality of temperature-detecting device who corresponds with a plurality of LED display screen respectively, wherein:
the correction coefficient generation device selects one LED display screen from the LED display screens of each specification as a reference box body and sends shooting control information to the camera;
the camera receives shooting control information and shoots each reference box body to obtain a corrected image;
the correction coefficient generating device acquires a correction image, acquires corresponding temperature detection data from a receiving card connected with each reference box body, and generates correction coefficient change trend data of each reference box body corresponding to the temperature; sending the correction coefficient variation trend data of the temperature measurement area of each reference box body to a receiving card connected with the LED display screens with the same specification;
all the receiving cards receive temperature detection data corresponding to the temperature detection devices, and dynamically adjust display parameters corresponding to the LED display screen according to the temperature detection data, the cold screen correction coefficient and the correction coefficient variation trend data;
and the LED display screens with different specifications respectively receive the adjusted display parameters and correspondingly display the display parameters.
According to the LED screen correction coefficient generation method, the LED screen correction coefficient adjustment method and the LED screen correction system, the temperature measurement area which is greatly influenced by the temperature in the LED display screen is determined, the display correction coefficients of the temperature measurement area at different temperatures are calculated, the correction coefficient change trend data of the LED display screen corresponding to the temperature is further generated, the correction coefficient is dynamically adjusted by corresponding the correction coefficient change trend data and the cold screen correction coefficient to the temperature of the LED display screen, the brightness and the chroma of the whole LED display screen at different temperatures are not different, the problems of color cast and uneven brightness of the display screen due to the temperature change in the actual use process are solved, the correction effect is improved, and the display effect of the display screen is also improved; on the other hand, only one set of cold screen correction coefficient needs to be stored in the receiving card, so that the flash storage space of the receiving card is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart (I) illustrating steps of a method for generating a correction coefficient of an LED panel according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating steps of a method for generating a correction coefficient of an LED panel according to an embodiment of the present invention;
FIG. 3 is a flowchart (III) illustrating steps of a method for generating a correction coefficient of an LED panel according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating steps of a method for adjusting a correction factor of an LED panel according to an embodiment of the present invention;
FIG. 5 is a structural composition diagram of an LED screen correction coefficient generation apparatus according to an embodiment of the present invention;
fig. 6 is a structural composition diagram of an LED screen correction system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method for generating the correction coefficient of the LED screen in the embodiment of the invention, as shown in FIG. 1, comprises the following steps:
step S10: and acquiring a cold screen correction coefficient of the LED display screen and issuing the cold screen correction coefficient to the receiving card.
The cold screen correction coefficient of the LED display screen is a set of correction coefficients corresponding to the LED display screen when the LED display screen is cold screen, and is irrelevant to the temperature of the LED display screen. The cold screen correction factor can be obtained by adopting the prior art, and the step is not particularly limited. The receiving card receives the cold screen correction coefficient and then stores the cold screen correction coefficient in the flash, and the cold screen correction coefficients corresponding to the LED display screens of different models are different and should be correspondingly obtained and issued.
Step S20: and determining a temperature measurement area greatly influenced by the temperature in the LED display screen according to a preset LED display screen analysis strategy.
The LED display screen in the step can be one LED screen body or a large display screen formed by splicing a plurality of LED screen bodies, when the LED display screen is a spliced screen, the used unit screens can be the same in specification or different in specification, and boxes of different specifications and different batches can have brightness and chroma differences at the same temperature. Specifically, when the specifications of the unit screens are the same, one of the unit screens can be used as a reference box body to detect a temperature measurement area greatly influenced by temperature, and if the specifications of the unit screens are different, one unit screen is selected from the unit screens of each specification to be used as the reference box body to determine the temperature measurement area greatly influenced by temperature.
An LED display screen may contain a temperature measurement area, which may be the center area of the LED display screen or other area that is more affected by temperature. One LED display screen can also comprise a plurality of temperature measurement areas, each temperature measurement area comprises a plurality of lamp points, and the temperature measurement areas where some lamp points which are greatly influenced by the temperature are located, such as the lamp points in specific areas such as the center area and the central line area of the LED display screen, are selected in the step. The step is realized by measuring through a temperature detection device when temperature factors are considered, for example, a plurality of temperature sensors are required to be arranged because the measuring area range is small, and the temperature sensors are respectively positioned in four corner areas, a central area and other areas of the LED display screen. In general, the four corner regions belong to regions that are less affected by temperature, and the center region is a region that is more affected by temperature.
Specifically, as shown in fig. 2, step S20 of the embodiment of the present invention: the method comprises the following steps of determining a temperature measurement area which is greatly influenced by temperature in the LED display screen according to a preset LED display screen analysis strategy, and specifically comprises the following steps:
step S201: and acquiring a corrected image displayed by the LED display screen at different temperatures.
In the step, the temperature data corresponding to the correction images are acquired while the correction images are acquired, so that each correction image corresponds to a temperature value one by one. When the LED display screen works, the temperature of the screen body of the LED display screen can be gradually increased along with the increase of the working time, and the higher the temperature is, the larger the difference of the brightness and the chroma of the corresponding area of the LED display screen is. In order to obtain a more accurate result, the correction images obtained in the present embodiment are all obtained under the same image obtaining condition, and the correction image is generally obtained by taking a picture with a camera, so that when one unit screen is taken, the shooting position, environment and camera parameters are not changed.
It should be noted here that the temperature of the LED display screen increases nonlinearly with time in the working process, for example, the temperature before starting up is the external ambient temperature, the temperature after starting up gradually increases from the ambient temperature, and the temperature difference value 10 minutes after starting up is not equal to the temperature difference value 10 minutes after starting up. Therefore, when the correction image is obtained in the step, the correction image can be obtained at regular time, and the correction image can also be obtained according to the temperature value.
Step S202: and comparing and analyzing the plurality of corrected images to determine a temperature measurement area which is greatly influenced by the temperature in the LED display screen.
After the correction images at different temperatures are acquired, the correction images are compared and analyzed, and finally, a temperature measurement area which is greatly influenced by the temperature in the LED display screen is determined. The shape of the partial temperature measurement area is similar to that of a cross line area, and after the partial temperature measurement area is determined, the lamp points in the area can be known.
After the temperature measurement area of the LED display screen, which is greatly affected by the temperature, is determined through the above steps, step S30 is performed.
Step S30: and calculating the display correction coefficients of the temperature measurement areas at different temperatures according to a preset correction coefficient calculation strategy.
In the step, display correction coefficients at each temperature are calculated in each temperature measurement area of the LED display screen, if a plurality of temperature sensors are arranged in one temperature measurement area, an averaging mode is adopted as the temperature of the temperature measurement area, and the correspondence between one temperature value and one group of correction coefficients is realized.
Specifically, in the embodiment of the present invention, step S30: calculating display correction coefficients of temperature measurement areas at different temperatures according to a preset correction coefficient calculation strategy, and specifically comprising the following steps of:
and calculating the display correction coefficient of the temperature measurement area at the corresponding temperature according to the correction image and a preset correction coefficient calculation strategy.
And repeating the previous step to obtain the display correction coefficients of the temperature measurement areas at all temperatures.
The corresponding display correction coefficients are calculated for the corrected image, which can be implemented using existing schemes. For example, the corrected image at the set temperature is used as the original display effect map, and the other corrected images are compared and analyzed with the original display effect map, so as to obtain the corresponding display correction coefficients. In this embodiment, the display correction coefficients corresponding to the correction images in the same temperature measurement area are calculated according to the correction coefficient calculation strategy.
Step S40: and generating correction coefficient variation trend data of the LED display screen corresponding to the temperature according to the display correction coefficient and a preset variation trend generation strategy.
The correction coefficient variation trend data of the LED display screen corresponding to the temperature generated in the step can be input into the artificial intelligent model for training and optimization by taking a plurality of groups of temperatures and display correction coefficients as input values, so that the corresponding relation between the correction coefficient variation trend data and the temperature is more accurate, the general applicability of the correction coefficient variation trend data is strong (for most of boxes with the same specification), and the correction effect of the LED display screen is further improved. The artificial intelligence model listed in this embodiment is a model that analyzes the temperature and the display correction coefficient, and the more the measured temperature values are, the more the corrected image acquisition times are, the higher the precision is, and the more accurate the integrated correction coefficient change trend data is.
In the embodiment of the present invention, if there are more temperature measurement areas, it may be determined whether the correction coefficient needs to be adjusted by calculating the temperature difference between adjacent temperature measurement areas, and during the process that the difference becomes smaller or larger and during the process that the difference is not changed, the change trend of the correction coefficient is matched, for example, the change trend data of the correction coefficient gradually and slowly increases or rapidly increases with the temperature increase, or the change trend data of the correction coefficient does not change with the temperature increase, for example, the temperature difference is smaller, even if the temperature value of each area is higher, the correction coefficient of the lamp point in the temperature measurement area with higher temperature does not need to be adjusted too much because the brightness difference displayed between the lamp points in the adjacent temperature measurement areas is small, and if the temperature difference between the adjacent temperature measurement areas is larger, it indicates that there is a larger difference displayed between the lamp points in different areas, at this time, the correction coefficient of each lamp point in the LED display screen needs to be adjusted according to the data of the variation trend of the correction coefficient, so as to achieve the effect of uniform display of the entire LED display screen. The artificial intelligence model can determine how the correction coefficients are adjusted by analyzing the temperature difference values of the plurality of temperature measurement areas; if the temperature measuring area is small, the temperature value can be directly corresponding to the correction coefficient change trend data.
Specifically, as shown in fig. 3, step S40 in this embodiment of the present invention: generating correction coefficient variation trend data of the LED display screen corresponding to the temperature according to the display correction coefficient and a preset variation trend generation strategy, and specifically comprising the following steps:
step S401: and acquiring display correction coefficients of the temperature measurement areas at different temperatures.
Step S402: the display correction coefficients of the temperature measurement areas are arranged correspondingly in the order of increasing from the initial temperature.
Step S403: and generating correction coefficient variation trend data of the LED display screen according to the variation trend generation strategy.
The embodiment of the invention integrates the correction coefficients of all the temperature measurement areas according to the change trend generation strategy, and the temperature values of the partial areas can not be acquired for the areas outside the temperature measurement areas, so the correction coefficients can be directly corrected by using the cold screen correction coefficients.
And sending the correction coefficient change trend data and the correction coefficient data as correction coefficient change trend data of the LED display screen, storing the correction coefficient change trend data and the correction coefficient data by the receiving card, and performing corresponding picture correction in the display process of the LED display screen.
Step S50: and transmitting the correction coefficient change trend data to a receiving card.
Specifically, in the above embodiment of the present invention, the correction coefficient variation trend data includes a data map of each lamp point in the LED display screen, where the data map uses the temperature as an abscissa and the correction coefficient as an ordinate, and when the correction coefficient is a luminance correction coefficient, the data map includes a luminance correction coefficient corresponding to each of the R lamp, the G lamp, and the B lamp, and when the correction coefficient is a chrominance correction coefficient, the data map includes three chrominance correction coefficients corresponding to each of the R lamp, the G lamp, and the B lamp. Therefore, the correction coefficient variation trend of one temperature measurement area can be used as the correction coefficient variation trend of all lamp points of the whole screen LED display screen, and therefore the adjustment efficiency of the correction coefficient is improved.
The main body of the method for generating the LED screen correction coefficient is an upper computer and is in communication connection with a receiving card.
Correspondingly, the embodiment of the present invention further includes an LED screen correction coefficient generating device, as shown in fig. 5, the correction coefficient generating device 100 includes a cold screen correction coefficient obtaining module 101, a temperature measurement area determining module 102, a display correction coefficient generating module 103, a correction coefficient variation trend generating module 104, and a communication module 105, wherein:
the cold screen correction coefficient acquisition module 101 is connected with the communication module 105 and used for acquiring a cold screen correction coefficient of the LED display screen;
the temperature measurement area determining module 102 is connected with the display correction coefficient generating module 103 and is used for determining a temperature measurement area which is greatly influenced by temperature in the LED display screen according to a preset LED display screen analysis strategy;
the display correction coefficient generation module 103 is connected with the temperature measurement region determination module 102 and the correction coefficient variation trend generation module 104, and is used for calculating the display correction coefficients of the temperature measurement regions at different temperatures according to a preset correction coefficient calculation strategy;
the correction coefficient variation trend generation module 104 is connected with the display correction coefficient generation module 103 and the communication module 105, and is used for generating correction coefficient variation trend data of the LED display screen corresponding to the temperature according to the display correction coefficient and a preset variation trend generation strategy;
and the communication module 105 is connected with the correction coefficient change trend generation module 104 and the cold screen correction coefficient acquisition module 101, and is used for issuing the cold screen correction coefficient and the correction coefficient change trend data to the receiving card.
The LED screen correction coefficient generation device provided by the embodiment of the invention can be realized by the following steps:
step S10: and acquiring a cold screen correction coefficient of the LED display screen and issuing the cold screen correction coefficient to the receiving card.
Step S20: and determining a temperature measurement area greatly influenced by the temperature in the LED display screen according to a preset LED display screen analysis strategy. Step S20 specifically includes:
step S201: and acquiring a corrected image displayed by the LED display screen at different temperatures.
Step S202: and comparing and analyzing the plurality of corrected images to determine a temperature measurement area which is greatly influenced by the temperature in the LED display screen.
Step S30: and calculating display correction coefficients of temperature measurement areas at different temperatures according to a preset correction coefficient calculation strategy.
Step S40: and generating correction coefficient variation trend data of the LED display screen corresponding to the temperature according to the display correction coefficient and a preset variation trend generation strategy. Step S40 specifically includes:
step S401: and acquiring display correction coefficients of the temperature measurement areas at different temperatures.
Step S402: the display correction coefficients of the temperature measurement areas are arranged correspondingly in the order of increasing from the initial temperature.
Step S403: and generating correction coefficient variation trend data of the LED display screen according to the variation trend generation strategy.
Step S50: and transmitting the correction coefficient variation trend data to a receiving card.
For the implementation of the above steps, reference may be made to the embodiment of the method for generating the correction coefficient of the LED screen of the present invention for implementation, and details are not described here.
The embodiment of the invention also comprises a method for adjusting the correction coefficient of the LED screen, which comprises the following steps as shown in FIG. 4:
step S10': and collecting the cold screen correction coefficient of the LED display screen.
Step S20': and collecting correction coefficient variation trend data of the LED display screen corresponding to the temperature.
The correction coefficient change trend data is generated through an upper computer according to a display correction coefficient and a preset change trend generation strategy, the display correction coefficient is obtained through calculation of the upper computer at different temperatures for a temperature measurement area according to a preset correction coefficient calculation strategy, and the temperature measurement area comprises a temperature measurement area which is determined by the upper computer to be greatly influenced by temperature in an LED display screen according to a preset LED display screen analysis strategy.
Step S30': and receiving the temperature data of the LED display screen.
Step S40': and dynamically adjusting the display parameters of the LED display screen according to the temperature detection data, the cold screen correction coefficient and the correction coefficient change trend data.
According to the corresponding relation between the correction coefficient change trend data, the cold screen correction data and the temperature detection data, corresponding correction coefficients can be generated for all lamp points in the LED display screen, and therefore display parameters are adjusted to be correspondingly displayed by the LED display screen. When the temperature of the LED display screen dynamically changes, the corresponding display parameters are dynamically adjusted according to the change of the temperature.
Step S50': and sending the adjusted display parameters to the LED display screen.
The LED screen correction coefficient adjusting method provided by the embodiment of the invention is realized by taking the receiving card as the main body, and after the receiving card sends the display parameters dynamically adjusted according to the temperature detection data to the LED display screen, all lamp points of the LED display screen are correspondingly displayed, so that the problem of different brightness and chromaticity differences of different areas caused by temperature changes in the actual use process of the display screen is solved.
The embodiment of the present invention further includes an LED screen calibration system, as shown in fig. 6, the calibration system includes the calibration coefficient generating device 100 of the above embodiment, and a receiving card 200, an LED display screen 300, a camera 400, and a temperature detecting device 500, where:
and the camera 400 is in communication connection with the correction coefficient generation device 100, and the camera 400 is used for receiving the shooting control information sent by the correction coefficient generation device 100 and shooting the LED display screen 300 to obtain a corrected image.
The temperature detection device 500 is in communication connection with the receiving card 200, and the temperature detection device 500 is used for detecting the temperature of a temperature measurement area on the LED display screen and generating temperature detection data;
a correction coefficient generating device 100, which is connected with the receiving card 200 and the camera 400 in a communication way, wherein the correction coefficient generating device 100 is used for sending shooting control information to the camera 400, acquiring a correction image, and acquiring temperature detection data to the receiving card 200 so as to generate correction coefficient change trend data of the LED display screen 300 corresponding to the temperature; sending the cold screen correction coefficient and the correction coefficient variation trend data to the receiving card 200;
the receiving card 200 is in communication connection with the LED display screen 300, the correction coefficient generating device 100 and the temperature detecting device 500, and the receiving card 200 is configured to receive temperature detection data, a cold screen correction coefficient and correction coefficient variation trend data; dynamically adjusting the display parameters of the LED display screen 300 according to the temperature detection data, the cold screen correction coefficient and the correction coefficient variation trend data;
and the LED display screen 300 is in communication connection with the receiving card 200, and the LED display screen 300 is used for receiving the adjusted display parameters and displaying the adjusted display parameters correspondingly.
Specifically, the calibration system in the embodiment of the present invention includes a plurality of LED display screens 300 with the same specification, a plurality of receiving cards 200 which are the same in number as the LED display screens 300 and are correspondingly connected to the LED display screens 300, and a plurality of temperature detection devices 500 which respectively correspond to the LED display screens 300, wherein:
the correction coefficient generation apparatus 100 selects one LED display 300 among the plurality of LED displays 300 as a reference box, and transmits photographing control information to the camera 400.
The camera 400 receives the photographing control information and photographs the reference box to obtain a corrected image.
The correction coefficient generating device 100 acquires the correction image, acquires temperature detection data from the receiving card 200 connected with the reference box body, and generates correction coefficient variation trend data of the reference box body corresponding to the temperature; and transmits the correction coefficient variation tendency data to all the receiving cards 200.
All the receiving cards 200 receive the temperature detection data corresponding to the temperature detection device 500, and dynamically adjust the display parameters corresponding to the LED display screen 300 according to the temperature detection data, the cold screen correction coefficient and the correction coefficient variation trend data.
All the LED display screens 300 receive the adjusted display parameters and perform corresponding display.
The LED display screens 300 in this embodiment have the same specification, and the correction coefficient variation trend data corresponding to each LED display screen 300 can be generated, but it takes much time to do so, so that it is only necessary to select one reference box to generate one set of correction coefficient variation trend data, and the common display requirements of the LED display screens 300 having the same specification can be met.
Specifically, the calibration system in the embodiment of the present invention includes a plurality of LED display screens 300 with different specifications, a plurality of receiving cards 200 which are the same in number as the LED display screens 300 and are correspondingly connected to the LED display screens 300, and a plurality of temperature detection devices 500 which respectively correspond to the LED display screens 300, wherein:
the correction coefficient generation apparatus 100 selects one LED display 300 as a reference box among the LED displays 300 of each specification, and transmits shooting control information to the camera 400.
The camera 400 receives the photographing control information and photographs each reference box to obtain a corrected image.
The correction coefficient generating device 100 acquires the correction image, acquires corresponding temperature detection data to the receiving card 200 connected with each reference box body, and generates correction coefficient change trend data of the temperature measurement area of each reference box body corresponding to the temperature; and transmitting the correction coefficient variation trend data of each reference box body to the receiving card 200 connected with the LED display screens 300 with the same specification.
All the receiving cards 200 receive the temperature detection data corresponding to the temperature detection device 500, and dynamically adjust the display parameters corresponding to the LED display screen 300 according to the temperature detection data, the cold screen correction data and the correction coefficient variation trend data.
The LED display screens 300 of different specifications receive the adjusted display parameters and perform corresponding display.
In the LED display screen calibration system of the present invention, the temperature detection device 500 may be a temperature sensor installed inside the LED display screen 300, or may be an infrared sensing device installed outside the LED display screen 300. The correction coefficient generation device 100 acquires the thermodynamic diagram detected by the infrared sensing device, and then analyzes the thermodynamic diagram, thereby obtaining a temperature measurement region.
According to the LED screen correction coefficient generation method, the LED screen correction coefficient adjustment method and the LED screen correction system, the temperature measurement area which is greatly influenced by the temperature in the LED display screen is determined, the display correction coefficients of the temperature measurement areas at different temperatures are calculated, the correction coefficient change trend data of the LED display screen corresponding to the temperature is further generated, the correction coefficient is dynamically adjusted by enabling the correction coefficient change trend data and the cold screen correction coefficient to correspond to the temperature of the LED display screen, the brightness and the chroma of the whole LED display screen at different temperatures are not different, the problems of color cast and uneven brightness of the display screen due to the temperature change in the actual use process are solved, the correction effect is improved, and the display effect of the display screen is also improved; on the other hand, only one set of cold screen correction coefficient needs to be stored in the receiving card, so that the flash storage space of the receiving card is saved.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.
Claims (8)
1. A method for generating a correction coefficient of an LED screen is characterized by comprising the following steps:
acquiring a cold screen correction coefficient of the LED display screen and issuing the cold screen correction coefficient to a receiving card;
determining a temperature measurement area greatly influenced by temperature in the LED display screen according to a preset LED display screen analysis strategy;
calculating display correction coefficients of the temperature measurement areas at different temperatures according to a preset correction coefficient calculation strategy;
generating correction coefficient variation trend data of the LED display screen corresponding to the temperature according to the display correction coefficient and a preset variation trend generation strategy;
the correction coefficient change trend data is issued to a receiving card;
wherein, according to predetermined LED display screen analysis strategy determine receive the temperature measurement region that temperature influence is big in the LED display screen, include: acquiring corrected images displayed by an LED display screen at different temperatures; comparing and analyzing the plurality of corrected images to determine a temperature measurement area which is greatly influenced by temperature in the LED display screen;
the calculating of the display correction coefficients of the temperature measurement areas at different temperatures according to a preset correction coefficient calculation strategy comprises the following steps: calculating a display correction coefficient of the temperature measurement area at the corresponding temperature according to the correction image and a preset correction coefficient calculation strategy; and repeating the previous step to obtain the display correction coefficients of the temperature measurement areas at all temperatures.
2. The method for generating the correction coefficient of the LED screen according to claim 1, wherein the generating the correction coefficient variation trend data of the LED screen corresponding to the temperature according to the display correction coefficient and a preset variation trend generating strategy comprises:
acquiring the display correction coefficients of the temperature measurement areas at different temperatures;
arranging the display correction coefficients of the temperature measurement areas correspondingly in an order of gradually increasing from an initial temperature;
and generating correction coefficient variation trend data of the LED display screen according to the variation trend generation strategy.
3. The method according to claim 1, wherein the correction coefficient variation trend data includes a data map of each lamp point of the LED display screen, the data map includes a luminance correction coefficient corresponding to each of the R lamp, the G lamp, and the B lamp when the temperature is plotted on an abscissa and the correction coefficient is plotted on an ordinate, and the data map includes three chrominance correction coefficients corresponding to each of the R lamp, the G lamp, and the B lamp when the correction coefficient is a luminance correction coefficient.
4. A method for adjusting a correction coefficient of an LED screen is characterized by comprising the following steps:
collecting a cold screen correction coefficient of the LED display screen;
collecting correction coefficient variation trend data of the LED display screen corresponding to the temperature; the correction coefficient variation trend data is generated by an upper computer according to a display correction coefficient and a preset variation trend generation strategy, the display correction coefficient is obtained by calculating a temperature measurement area at different temperatures through the upper computer according to a preset correction coefficient calculation strategy, and the temperature measurement area comprises a temperature measurement area which is determined by the upper computer to be greatly influenced by temperature in an LED display screen according to a preset LED display screen analysis strategy;
receiving temperature data of the LED display screen;
dynamically adjusting display parameters of the LED display screen according to the temperature detection data, the cold screen correction coefficient and the correction coefficient change trend data;
sending the adjusted display parameters to an LED display screen;
wherein, according to predetermined LED display screen analysis strategy confirm in the LED display screen receive the temperature measurement area that temperature influence is big, include: acquiring corrected images displayed by an LED display screen at different temperatures; comparing and analyzing the plurality of corrected images to determine a temperature measurement area which is greatly influenced by temperature in the LED display screen;
the display correction coefficient is calculated for a temperature measurement area by an upper computer at different temperatures according to a preset correction coefficient calculation strategy, and comprises the following steps: calculating a display correction coefficient of the temperature measurement area at the corresponding temperature according to the correction image and a preset correction coefficient calculation strategy; and repeating the previous step to obtain the display correction coefficients of the temperature measurement areas at all temperatures.
5. The LED screen correction coefficient generation device is characterized by comprising a cold screen correction coefficient acquisition module, a temperature measurement area determination module, a display correction coefficient generation module, a correction coefficient change trend generation module and a communication module, wherein:
the cold screen correction coefficient acquisition module is connected with the communication module and is used for acquiring the cold screen correction coefficient of the LED display screen;
the temperature measurement area determining module is connected with the display correction coefficient generating module and is used for determining a temperature measurement area which is greatly influenced by temperature in the LED display screen according to a preset LED display screen analysis strategy;
the display correction coefficient generation module is connected with the temperature measurement area determination module and the correction coefficient variation trend generation module and is used for calculating the display correction coefficients of the temperature measurement areas at different temperatures according to a preset correction coefficient calculation strategy;
the correction coefficient change trend generation module is connected with the display correction coefficient generation module and the communication module and is used for generating correction coefficient change trend data of the LED display screen corresponding to the temperature according to the display correction coefficient and a preset change trend generation strategy;
the communication module is connected with the correction coefficient change trend generation module and the cold screen correction coefficient acquisition module and is used for sending the cold screen correction coefficient and the correction coefficient change trend data to a receiving card;
wherein, according to predetermined LED display screen analysis strategy determine receive the temperature measurement region that temperature influences greatly in the LED display screen, include: acquiring corrected images displayed by an LED display screen at different temperatures; comparing and analyzing the plurality of corrected images to determine a temperature measurement area which is greatly influenced by temperature in the LED display screen;
the calculating of the display correction coefficients of the temperature measurement areas at different temperatures according to the preset correction coefficient calculation strategy comprises the following steps: calculating a display correction coefficient of the temperature measurement area at the corresponding temperature according to the correction image and a preset correction coefficient calculation strategy; and repeating the previous step to obtain the display correction coefficients of the temperature measurement areas at all temperatures.
6. An LED screen calibration system, comprising the calibration coefficient generation apparatus of claim 5, and a receiving card, an LED display screen, a camera, and a temperature detection apparatus, wherein:
the camera is in communication connection with the correction coefficient generating device and is used for receiving shooting control information sent by the correction coefficient generating device and shooting the LED display screen to obtain a corrected image;
the temperature detection device is in communication connection with the receiving card and is used for detecting the temperature of a temperature measurement area on the LED display screen and generating temperature detection data;
the correction coefficient generating device is in communication connection with the receiving card and the camera, and is used for sending shooting control information to the camera, acquiring the corrected image and acquiring the temperature detection data to the receiving card so as to generate correction coefficient change trend data of the LED display screen corresponding to the temperature; sending the cold screen correction coefficient and the correction coefficient change trend data to the receiving card;
the receiving card is in communication connection with the LED display screen, the correction coefficient generating device and the temperature detecting device, and is used for receiving the temperature detection data, the cold screen correction coefficient and the correction coefficient change trend data; dynamically adjusting the display parameters of the LED display screen according to the temperature detection data, the cold screen correction coefficient and the correction coefficient change trend data;
the LED display screen is in communication connection with the receiving card and is used for receiving the adjusted display parameters and displaying the display parameters correspondingly.
7. The LED display screen calibration system according to claim 6, wherein the calibration system comprises a plurality of LED display screens of the same specification, a plurality of receiving cards correspondingly connected to the LED display screens in the same number, and a plurality of temperature detection devices respectively corresponding to the plurality of LED display screens, wherein:
the correction coefficient generation device selects one LED display screen from the plurality of LED display screens as a reference box body and sends shooting control information to the camera;
the camera receives the shooting control information and shoots the reference box body to obtain a corrected image;
the correction coefficient generating device acquires the correction image, acquires the temperature detection data from the receiving card connected with the reference box body, and generates correction coefficient change trend data of the reference box body corresponding to the temperature; sending the correction coefficient variation trend data to all the receiving cards;
all the receiving cards receive the temperature detection data corresponding to the temperature detection devices, and dynamically adjust the display parameters corresponding to the LED display screens according to the temperature detection data, the cold screen correction coefficients and the correction coefficient variation trend data;
and all the LED display screens respectively receive the adjusted display parameters and correspondingly display the display parameters.
8. The LED display screen calibration system according to claim 6, wherein the calibration system comprises a plurality of LED display screens of different specifications, a plurality of receiving cards correspondingly connected to the LED display screens in the same number, and a plurality of temperature detection devices respectively corresponding to the plurality of LED display screens, wherein:
the correction coefficient generation device selects one LED display screen from the LED display screens of each specification as a reference box body and sends shooting control information to the camera;
the camera receives the shooting control information and shoots each reference box body to obtain a corrected image;
the correction coefficient generating device acquires the correction image, acquires corresponding temperature detection data from the receiving card connected with each reference box body, and generates correction coefficient change trend data of each reference box body corresponding to the temperature; sending the correction coefficient variation trend data of the temperature measurement area of each reference box body to the receiving card connected with the LED display screens of the same specification;
all the receiving cards receive the temperature detection data corresponding to the temperature detection devices, and dynamically adjust the display parameters corresponding to the LED display screens according to the temperature detection data, the cold screen correction coefficients and the correction coefficient variation trend data;
and the LED display screens with different specifications respectively receive the adjusted display parameters and correspondingly display the display parameters.
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| JP2012237972A (en) * | 2011-04-26 | 2012-12-06 | Canon Inc | Temperature estimation device, control method thereof and image display device |
| JP6039337B2 (en) * | 2012-09-28 | 2016-12-07 | キヤノン株式会社 | Display device and control method thereof |
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