LED nixie tube display control method for electronic display screen

Abstract

The invention relates to the technical field of LED color regulation and control, in particular to an LED nixie tube display control method for an electronic display screen, and the method comprises the steps: constructing a gradual change significance coefficient at each moment through calculating the same-channel color difference between RGB values of the electronic display screen at adjacent moments; according to the hysteresis quality and correlation of the same channel color in the color values of the electronic display screen at all moments influenced by the temperature, and in combination with the difference between the color change and the temperature change at each moment, the temperature interference degree of each channel color is constructed; establishing a basic temperature influence deviation by presetting a difference between a switching color actual value and a standard value and a difference between an actual temperature and a reference temperature; therefore, the three primary colors can be compensated independently, it is ensured that the electronic display screen does not have a color sudden change phenomenon in the color switching process, and the display control effect of the electronic display screen is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LED color regulation, and particularly relates to an LED nixie tube display control method for an electronic display screen. BACKGROUND

[0002] The LED nixie tube can realize diversified color changes, but the color is usually directly switched, and there are problems such as harsh color switching and visual effect mutation, so the existing LED nixie tube display method has been difficult to meet the high requirements of modern devices on display effect and user experience. Therefore, a control chip is built in the LED nixie tube of the electronic display screen, which can receive digital signals and analyze RGB values, and then adjust the brightness of the built-in LED through the built-in PWM controller, so as to realize color switching. Thus, clearer, brighter and diversified display effects can be realized, which can better adapt to the diversified needs of modern devices and improve the user experience.

[0003] In order to solve the problem of harsh color switching of the LED nixie tube, the prior art has realized the gradual switching effect between colors by using the pulse width modulation (PWM) technology to control the display of the LED nixie tube. However, for some devices equipped with electronic display screens, such as manicure lamps, there is a problem of heating after long-term use. With the continuous use of the manicure lamp, the temperature of the nixie lamp beads (a special type of LED lamp bead) inside the electronic display screen will also fluctuate, which will cause the color of the lamp beads to deviate, and thus abnormal mutation of color will occur in the color gradient process, which will destroy the animation gradient effect between color switching of the LED nixie tube and affect the display effect of the electronic display screen. SUMMARY

[0004] In order to solve the above technical problems, the present application provides an LED nixie tube display control method for an electronic display screen to solve the existing problems.

[0005] The LED nixie tube display control method for an electronic display screen of the present application adopts the following technical scheme: One embodiment of the present application provides an LED nixie tube display control method for an electronic display screen, which comprises the following steps: A color switching sequence of the electronic display screen is preset, the standard values of three primary colors of the LED nixie tube of the electronic display screen are obtained, and the standard values of each preset switching color are determined; the RGB values of the color of the electronic display screen and the temperature of the LED nixie tube at each time are collected, and a color gradient matrix and a temperature sequence are constructed; The color gradient matrix is sub-matrix divided based on a preset number of switching colors of the electronic display screen; a first abnormal value of each row vector is calculated based on an abnormal situation between the distance between each row vector and a previous row vector in the sub-matrix; a first difference of each row vector is constructed based on the difference between the element values in each row vector; and a gradient significant coefficient of each row vector is constructed based on the first abnormal value and the first difference; An abnormal row vector is determined based on the gradient significant coefficient of all row vectors; and a temperature interference degree of the color corresponding to each element in each row vector is determined based on the correlation between each column vector in the color gradient matrix and the temperature sequence under different time lags, and the dispersion degree of each element value in the first-order difference sequence of each column vector and the first-order difference sequence of the temperature sequence; A basic temperature influence bias of each channel color is constructed based on the difference between the last row vector in each sub-matrix and the standard value of the corresponding preset switching color, and the difference between the temperature data corresponding to the last row vector and the preset reference temperature; A compensation coefficient of each channel color at each time is constructed based on the basic temperature influence bias, the difference between the temperature at each time and the preset reference temperature, and the temperature interference degree of the abnormal row vector; a compensation value of each channel color is determined based on the compensation coefficient, and a digital tube display is performed.

[0006] In one embodiment, the color gradient matrix is sub-matrix divided based on the preset number of switching colors of the electronic display screen, specifically: the number of preset switching colors is denoted as T, and the color gradient matrix is divided into T+1 sub-matrices.

[0007] In one embodiment, the first abnormal value of each row vector is specifically: The distance between each row vector and the previous row vector in the sub-matrix is calculated and denoted as a first distance; the first distance of all row vectors in the sub-matrix is taken as the input of the abnormality detection algorithm, and the output is the abnormal value corresponding to each row vector, denoted as a first abnormal value.

[0008] In one embodiment, the first difference of each row vector is specifically: The first color relative ratio, the second color relative ratio, and the third color relative ratio of each row vector are constructed based on the difference between the elements in the jth row vector of the ith sub-matrix, and are denoted as , and , respectively, and the expressions are respectively: , and , wherein, R, G, and B color values in the jth row vector of the ith sub-matrix are denoted as Rj, Gj, and Bj, respectively; is a preset minimum positive number; Let the first difference of the jth row vector of the ith sub-matrix be denoted as , The expression of the first difference is: , , , , wherein

[0009] In one embodiment, the gradient significant coefficient of each row vector is the product of the first outlier of each row vector and the first difference.

[0010] In one embodiment, the determination process of the abnormal row vector is: Obtain the third quartile of all gradient significant coefficients of all row vectors in the color gradient matrix, and record the row vector corresponding to the gradient significant coefficient higher than the third quartile as the abnormal row vector.

[0011] In one embodiment, the obtaining process of the temperature interference degree of the color corresponding to each element in each row vector is: In the color gradient matrix, record the sequence composed of the elements in the pth column vector as the pth color sequence; take the pth color sequence and the temperature sequence as the input of the cross-correlation function, obtain the maximum value of the cross-correlation coefficient between the pth color sequence and the temperature sequence, take the time lag corresponding to the maximum value as the color time lag of the pth column vector, and denote it as ; record the ratio of the maximum value to the color time lag as the first ratio ; Record the row number range of the current sub-matrix in the color gradient matrix as [a, b]; in the temperature sequence, obtain the sequence composed of the temperature data with the bit sequence range in [a- , b- ] as the synchronous temperature sequence of the pth color sequence in the current sub-matrix; In the current sub-matrix, take the mode of the first difference sequence of the pth color sequence as the color gradient degree of the pth color sequence, and denote it as ; take the mode of the first difference sequence of the synchronous temperature sequence as the temperature gradient degree of the pth color sequence, and denote it as ; record the value of the j-1th element in the first difference sequence of the pth color sequence as , and record the value of the j-1th element in the first difference sequence of the synchronous temperature sequence as ; Calculate the temperature interference degree of the color corresponding to the pth element in the jth row vector of the current sub-matrix , The expression is: , wherein, is a preset minimum positive number.

[0012] In one embodiment, the process of obtaining the base temperature influence bias of each channel color is as follows: a sequence composed of the pth channel value in all color standard values in the preset switching color is taken as the standard switching sequence of the pth channel color; a sequence composed of the pth element value in the last row vector of the first T sub-matrices is taken as the color switching sequence of the pth channel color; the temperature data corresponding to the collection time of the last row vector of the first T sub-matrices is obtained, and a sequence composed of the temperature data is taken as the switching temperature sequence; the base temperature influence bias of the pth channel color is taken as , The expression of is as follows: , wherein, , , are the tth element in the color switching sequence of the pth channel color, the standard switching sequence of the pth channel color and the switching temperature sequence respectively; tem is a preset reference temperature; When the temperature at each time is consistent with the reference temperature, the value of is set to 1.

[0013] In one embodiment, the expression of the compensation coefficient of each channel color at each time is as follows: , wherein, represents the compensation coefficient of the pth channel color at the vth time; is a normalization function; is the difference between the temperature of the digital tube at the vth time and the preset reference temperature; is the base temperature influence bias of the pth channel color; is the average temperature interference degree of the pth element corresponding color of all abnormal row vectors; is a preset weight modification factor.

[0014] In one embodiment, the compensation value of each channel color is determined based on the compensation coefficient, and the digital tube display is performed, specifically as follows: The compensation coefficient of each channel color at the current time is determined; the color time lag corresponding to the pth channel color is obtained The pth channel value in the color value to be displayed on the electronic display screen at the future vth time at the current time is multiplied by the compensation coefficient of the pth channel color at the current time, and the calculation result is taken as the compensation value of the pth channel color at the future vth time at the current time. ​​The compensation value of the pth channel color at the moment; the color display of the LED fantasy color digital tube is realized through the compensation values of the red, blue and green channels at the future moments.

[0015] The present application has at least the following beneficial effects: The present application can accurately identify the abnormal mutation moment in the color gradient process by calculating the same channel color difference between the RGB values of the electronic display screen at adjacent moments to construct the gradient significant coefficient of the color value corresponding to each moment; the temperature influence hysteresis is analyzed through the cross correlation between the time sequence and the temperature sequence of the same channel color in the RGB values of the electronic display screen at all moments, the color time lag is obtained, and the temperature interference degree of each channel color is constructed in combination with the difference between the color change and the temperature change at each moment, so that the influence degree of temperature fluctuation on each channel color can be accurately analyzed, and a quantitative basis for independent compensation is provided; the basic temperature influence deviation is constructed by presetting the difference between the actual value and the standard value of the switching color, and the difference between the actual temperature and the reference temperature, so that the influence degree of temperature on color under different initial use temperatures can be considered, and the color can be more accurately compensated; the compensation coefficient of each channel color is constructed through the basic temperature influence deviation, the difference between the temperature at each moment and the reference temperature, and the temperature interference degree of the abnormal moment, so that the three primary colors can be independently compensated, and the phenomenon of color mutation in the color switching process of the electronic display screen can be ensured, the display control effect of the electronic display screen is improved, and the problem of color mutation in the color gradient process caused by temperature change is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0017] Figure 1 The flow chart of the LED digital tube display control method for the electronic display screen provided by the present application is shown in the figure. Figure 2 The schematic diagram of the acquisition process of the basic temperature influence deviation is shown in the figure. DETAILED DESCRIPTION

[0018] To further illustrate the technical means and effects employed by this application to achieve the intended invention objectives, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the specific implementation, structure, features, and effects of the LED digital tube display control method for an electronic display screen proposed in this application. In the following description, different references to "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0019] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0020] The specific scheme of the LED digital tube display control method for an electronic display screen provided by the present application is described in detail below with reference to the accompanying drawings.

[0021] An embodiment of the present application provides a method for controlling LED digital tube display for an electronic display screen.

[0022] Specifically, the following LED digital tube display control method for electronic display screen is provided, please refer to Figure 1 , the method comprises the following steps: Step S1, preset the color switching sequence of the electronic display screen, obtain the standard values ​​of the three primary colors of the LED digital tube of the electronic display screen, and determine the preset standard values ​​of each switching color; collect the RGB value of the electronic display screen color and the temperature of the LED digital tube at each moment, and construct a color gradient matrix and temperature sequence.

[0023] (1) The display control of the nail lamp used in this application has the function of presetting the color switching sequence. When the nail lamp is in normal use, the color switching on the electronic display screen of the nail lamp follows the pre-set color switching sequence. If the user does not set the color switching sequence before use, the default switching sequence of "white, red, orange, yellow, green, cyan, blue, and purple" is adopted.

[0024] Before using the nail lamp, first use the color sensor to obtain the RGB values ​​of the electronic display screen when the color is standard red, standard green, and standard blue at the reference temperature, and use the R value collected by the color sensor when the electronic display screen is standard red as the red standard value of the LED magic color digital tube in the electronic display screen. Similarly, use the G value collected when the electronic display screen is standard green as the green standard value, and use the B value collected when the electronic display screen is standard blue as the blue standard value. Preferably, the reference temperature in this embodiment of the application is 25°C. As an embodiment of this application, the implementer can set the value of the reference temperature according to actual conditions.

[0025] It should be noted that the red, green and blue are taken as the three primary colors in the embodiments of the present application, and RGB is the color value of the red, green and blue channels of the RGB color space.

[0026] (2) When the manicure lamp starts to be used, the electronic display screen uses a preset color switching sequence to switch colors, and the color sensor is used to collect the three primary color values, i.e., RGB values, of the electronic display screen at each moment during the use of the manicure lamp. For example, the RGB value of the electronic display screen when it is red is (255, 0, 0), and the RGB value when it is orange is (255, 97, 0).

[0027] Meanwhile, the temperature of the LED fantasy nixie tube in the electronic display screen is collected at each moment during the use of the manicure lamp by using the temperature sensor.

[0028] It should be noted that the color data of the electronic display screen and the temperature data of the LED fantasy nixie tube are collected synchronously, the collection frequency is set to 25 Hz, the collection time length is from the start of the use of the manicure lamp to the end of the use of the manicure lamp, and the time length is taken as a use cycle.

[0029] (3) A color gradient matrix of the use cycle is constructed according to the color value data of the electronic display screen at all moments in the use cycle, wherein the element in the ith row and jth column of the color gradient matrix is the color value in the jth channel of the RGB value of the color of the electronic display screen at the ith moment. The dimension of the color gradient matrix is denoted as m x n, wherein m is the number of collection moments in the use cycle, and n is the number of RGB color channels, and the value of n in the present application is 3.

[0030] The temperature sequence of the LED fantasy nixie tube is a sequence composed of the temperature data of the LED fantasy nixie tube in the electronic display screen at all moments in the use cycle in ascending order of time.

[0031] (4) The three primary color standard values at the reference temperature have been obtained, and the RGB values corresponding to other colors at the reference temperature can be derived from the three primary color standard values. The derivation of other colors from the three primary colors is a known technology, and the specific process will not be described again.

[0032] Thus, the RGB values of each color in the user preset switching color at the reference temperature are derived from the three primary color standard values as the standard values of each color.

[0033] Step S2, the color gradient matrix is divided into sub-matrices based on the number of preset switching colors of the electronic display screen; the first abnormal value of each row vector is calculated based on the abnormal situation between the distance of each row vector and the previous row vector; the first difference of each row vector is constructed based on the difference between the element values in each row vector; and the gradient significant coefficient of each row vector is constructed based on the first abnormal value and the first difference.

[0034] Normally, in the process of color switching of the electronic display screen, the color gradient of the electronic display screen should follow the preset smooth transition rule. If the LED light-emitting characteristics are changed due to temperature interference, the actual color value adjusted by the pulse width modulation technology (PWM) will deviate from the preset color value, thereby causing color mutation and affecting the display effect of the electronic display screen during color switching. Since the RGB values between the preset switching colors are not consistent, the gradient amplitude between different adjacent preset switching colors will also be inconsistent, thereby requiring more detailed analysis to achieve precise display control of the electronic display screen.

[0035] The gradient process data of the electronic display screen during color switching is extracted, specifically: First, the number of user preset switching colors is denoted as T, the color gradient matrix is traversed, and according to the number of switching colors T, the color gradient matrix is equally divided into T+1 sub-matrices according to time, and each sub-matrix corresponds to the gradient process between two adjacent preset colors. For example, if T is 3, the color change of the electronic display screen is: from the beginning of no color to color 1, color 1 to 2, color 2 to 3, color 3 to the end of no color, a total of four segments, and each segment has consistent duration.

[0036] Further, in each sub-matrix, for each row vector, taking the jth row vector as an example, the distance between the jth row vector and its previous row vector is calculated, denoted as the first distance of the jth row vector. Preferably, in the embodiments of the present application, the Euclidean distance between the jth row vector and its previous row vector is taken as the first distance of the jth row vector. In other embodiments of the present application, the Mahalanobis distance between the jth row vector and its previous row vector can also be taken as the first distance of the jth row vector.

[0037] It should be noted that the first distance of the first row vector in the sub-matrix is the distance between the first row vector and its next row vector. The first distance can reflect the color change difference between each time and the previous time in the color gradient process.

[0038] Further, the first distance of all row vectors in each sub-matrix is taken as the input of the LOF (Local Outlier Factor) anomaly detection algorithm, and the output is the abnormal value corresponding to each row vector, denoted as the first abnormal value of each row vector. The LOF anomaly detection algorithm is a known technology, and the specific process will not be repeated here.

[0039] It should be noted that for the anomaly detection of the first distance of all row vectors, the present application only provides an anomaly detection method, there are many existing anomaly detection methods, and the implementer can also use other anomaly detection algorithms such as COF (Clustering-based Outlier Factor) to perform anomaly detection on the first distance of all row vectors, and the present application does not make specific limitations.

[0040] The anomaly value can reflect whether the color change at each moment deviates significantly from other moments; the greater the anomaly value, the greater the possibility that the color change between the moment and the previous moment is not a natural gradual change.

[0041] Further, for each row vector in each sub-matrix, the relative color ratios of the row vector are constructed based on the numerical differences between R, G and B in the row vector, and the expressions are respectively: and , wherein, are the first color relative ratio, the second color relative ratio and the third color relative ratio of the jth row vector in the ith sub-matrix; are the R, G and B color values in the jth row vector of the ith sub-matrix; is a preset minimum positive number, which serves to avoid a denominator of 0, and preferably, in the embodiments of the present application, the value of is set to 0.01. As other embodiments of the present application, the implementer can set the value of according to the actual situation.

[0042] Further, the difference between the color relative ratio of each row vector in each sub-matrix and the color relative ratio of the previous row vector is calculated, denoted as the first difference of each row vector, and the expression is: , wherein, is the first difference of the jth row vector of the ith sub-matrix, are the first color relative ratio, the second color relative ratio and the third color relative ratio of the j-1th row vector in the ith sub-matrix. Among them, the first difference of the last row vector is the same as the first difference of the previous row vector.

[0043] If the color is smoothly transitioned in the gradual change process, the relative ratio change of the two moments will be relatively smooth, ​​​​​tends to 0; if a mutation of a certain color in the electronic display screen color value data at the collection time corresponding to the jth row vector occurs, it will cause at least two color relative contrast values to mutate, and further cause The first difference can reflect whether the color change between the two time points before and after the color gradient process is smooth and relatively consistent.

[0044] Further, based on the above analysis, the gradient significant coefficient of each row vector is constructed, and the expression is: In the formula, is the gradient significant coefficient of the jth row vector in the ith submatrix, is the first abnormal value of the jth row vector in the ith submatrix; is the first difference of the jth row vector in the ith submatrix.

[0045] The gradient significant coefficient can reflect whether the color change at the collection time corresponding to the row vector deviates from the preset gradient rule. The greater the gradient significant coefficient, the greater the possibility of abnormal mutation of a certain color at that time.

[0046] Step S3, determining the abnormal row vector based on the gradient significant coefficients of all row vectors; determining the temperature interference degree of the color corresponding to each element in each row vector based on the correlation between each column vector in the color gradient matrix and the temperature sequence at different time lags, and the dispersion degree of each element value in the first-order difference sequence of each column vector and the first-order difference sequence of the temperature sequence.

[0047] Since the three primary colors (red, green, and blue) of the LED are displayed using different semiconductor materials, the temperature interference of the three primary colors is not consistent, so further analysis is needed to quantify the temperature interference of the three primary colors when the color mutates and independently compensate the three primary colors, so as to accurately correct the color of the LED fantasy nixie tube, and ensure that the gradient effect of the electronic display screen during color switching does not appear abnormal mutation.

[0048] (1) The gradient significant coefficient of each row vector is obtained by the above method, and the gradient significant coefficients of all row vectors in the color gradient matrix are arranged in order from small to large, and the third quartile (75%) of all gradient significant coefficients is obtained. The row vector corresponding to the gradient significant coefficient higher than the third quartile is called an abnormal row vector. The third quartile is a known content, and the specific acquisition process is not repeated.

[0049] It should be noted that for the acquisition of abnormal row vectors, this application only provides one abnormality detection method. There are many existing abnormality detection methods, and implementers can also use other abnormality detection algorithms to obtain abnormal row vectors. This application does not make specific restrictions.

[0050] (2) In order to analyze the degree to which the three primary colors of LED digital tubes are affected by temperature, it is considered that the temperature effect has a hysteresis effect. After the temperature fluctuates, it takes a period of time for the color value to change. Therefore, if you want to accurately quantify the temperature interference, you need to eliminate the hysteresis effect.

[0051] The correlation degree of each column vector in the color gradient matrix with temperature change is analyzed to determine the degree to which each color data in the three primary colors is affected by temperature change. Specifically, the sequence composed of the elements in the pth column vector in the color gradient matrix in ascending time order is recorded as the pth color sequence of the color gradient matrix. The color sequence and the temperature sequence are used as inputs of the cross-correlation function, and the cross-correlation coefficient of the two sequences at time lags 1~s is calculated, where s is the mean number of rows of all sub-matrices; the maximum cross-correlation coefficient of the two sequences at all time lags is taken as the correlation between the two sequences, and the time lag corresponding to the maximum cross-correlation coefficient is taken as the time lag The cross-correlation function is a well-known technology, and the specific process will not be described in detail.

[0052] Calculate the maximum cross-correlation coefficient between the pth color sequence and the temperature sequence and the corresponding color lag The ratio of is recorded as the first ratio.

[0053] Taking red as an example, the first column vector of the color gradient matrix in this application is the color value of the red channel at all times. The larger the cross-correlation coefficient between this column vector and the temperature sequence, the stronger the correlation between temperature changes and red color changes; the smaller the color lag, the more direct the impact of temperature on red, that is, the faster the response change of red; the larger the first ratio, the greater the impact of temperature changes on red, so after the temperature changes, the more independent compensation is required for red.

[0054] (3) Further analyze each row vector in the submatrix, record the row number range of the current submatrix in the color gradient matrix as [a, b], and at the same time, obtain the pth color sequence in the current submatrix; in the temperature sequence, obtain the position sequence range in [a- ,b- The temperature data sequence constitutes a synchronization temperature sequence of the pth color sequence of the current sub-matrix. The synchronization temperature sequence eliminates the lag effect between the change of the corresponding color of each column vector in the sub-matrix and the change of the temperature, so that the influence of the temperature on the change of the corresponding color of each column vector can be accurately analyzed.

[0055] Considering that the color also gradually changes under normal circumstances, for each color sequence in the sub-matrix, a first difference sequence of the color sequence is obtained, denoted as a first difference sequence The mode element in the first difference sequence is recorded as the color gradient of the color sequence; a first difference sequence of the synchronization temperature sequence of the color sequence is obtained, denoted as a second difference sequence The mode element in the second difference sequence is recorded as the temperature gradient of the color sequence.

[0056] Further, the temperature interference degree of each element corresponding to the color in each row vector in the sub-matrix is calculated, and the expression is: In the formula, Tijp represents the temperature interference degree of the pth element corresponding to the color in the jth row vector in the current sub-matrix; represents the first ratio of the pth color sequence of the color gradient matrix; represents the value of the j-1th element in the first difference sequence of the pth color sequence of the current sub-matrix; represents the value of the j-1th element in the second difference sequence of the pth color sequence of the current sub-matrix; represents the temperature gradient of the pth color sequence of the current sub-matrix; represents the color gradient of the pth color sequence of the current sub-matrix; represents the temperature gradient of the pth color sequence of the current sub-matrix; represents a preset minimum positive number, which is used to avoid a denominator of 0. Preferably, in the embodiment of the present application, the value of T is set to 0.01. The temperature interference degree can analyze the degree of color mutation caused by the change of the temperature at each moment; the greater the temperature interference degree, the greater the change of the color and the smaller the change of the temperature, so as to represent the greater interference of the temperature on the red color. It should be noted that:

[0057] The value can be negative.

[0058] In step S4, based on the difference between the last row vector in each sub-matrix and the corresponding preset switching color standard value, and the difference between the temperature data corresponding to the last row vector and the preset reference temperature, the basic temperature influence deviation of each channel color is constructed.

[0059] ​Since the manicure lamp can be used more frequently, the temperature of the LED fantasy nixie tube can be high when it is just used in the current use cycle. When the LED fantasy nixie tube has been adjusted to the preset switching color, the actual collected switching color can be different from the preset color due to the interference error of the temperature. Therefore, the color value at the reference temperature can be combined to perform more accurate color compensation.

[0060] The sequence composed of the pth channel value in all color standard values in the preset switching color is taken as the standard switching sequence of the pth channel color.

[0061] In the actual use process of the manicure lamp, since the user's preset color is T, the color gradient matrix is divided into T+1 sub-matrices, and the last row sequence of the first T sub-matrices is the color value of the user's preset switching color. The first element of the row corresponds to the R channel value, the second element corresponds to the G channel value, and the third element corresponds to the B channel value. Therefore, the sequence composed of the pth element value in the last row vector of the first T sub-matrices is taken as the color switching sequence of the pth channel color. Similarly, the temperature data of the acquisition time corresponding to the last row vector of the first T sub-matrices is obtained, and the sequence constructed is taken as the switching temperature sequence.

[0062] Based on the difference between the data in the switching temperature sequence and the reference temperature, and the difference between the corresponding elements in the color switching sequence and the standard switching sequence, the influence deviation of the base temperature of the LED fantasy nixie tube on each channel color is constructed, and the expression is: , in the formula, is the influence deviation of the base temperature of the pth channel color; 、 、 , respectively, is the pth element in the color switching sequence of the pth channel color, the standard switching sequence of the pth channel color, and the switching temperature sequence; tem is the preset reference temperature; T is the number of switching colors preset by the user.

[0063] The influence deviation of the base temperature can reflect the difference degree of each channel color in the preset switching color at different temperatures, so as to further quantify the influence of the temperature on the red color, and then the red color can be compensated according to the difference between the LED temperature and the reference temperature in actual use.

[0064] It should be noted that if the temperature in actual use is consistent with the reference temperature, the color displayed by the LED fantasy nixie tube will also be consistent, and the value of is set to 1; if the temperature in actual use is inconsistent with the reference temperature, the value of is calculated through the above formula. At the same time, May take negative values.

[0065] Step S5, based on the basic temperature influence deviation, the difference between the temperature at each moment and the preset reference temperature, and the temperature interference degree of the abnormal row vector, construct a compensation coefficient for the color of each channel at each moment; determine the compensation value of each channel color based on the compensation coefficient, and perform digital tube display.

[0066] Based on the above analysis, the red compensation coefficient at each moment is constructed, and the expression is: Where, Indicates the compensation coefficient of the p-th channel color at the v-th moment; is a normalization function, and this embodiment uses the tanh function for normalization; The difference between the temperature of the LED digital tube corresponding to the vth moment and the preset reference temperature tem; The basic temperature influence deviation of the color of the pth channel of the LED magic color digital tube; is the mean value of the temperature interference of the color corresponding to the pth element of all abnormal row vectors; is a preset weight modification factor, ranging from 2 to 4. Preferably, in this embodiment, The value of is set to 2. The purpose of setting the weight modification factor is to balance the size of the compensation coefficient, ensuring that the compensated data is neither too large nor too small, thereby improving the reliability and accuracy of the data.

[0067] When the nail lamp starts a new use, the color displayed by the LED magic color digital tube is compensated by analyzing the difference between the current temperature and the reference temperature. Specifically, the difference between the current temperature and the reference temperature is calculated to determine the compensation coefficient of each channel color at the current moment; the color lag corresponding to the pth channel color is obtained. , the current moment will be in the future The pth channel value in the color value that the electronic display screen needs to display at the moment is multiplied by the compensation coefficient of the channel color at the current moment, and the calculation result is used as the pth channel value in the future at the current moment. The color compensation value of the pth channel at a given moment. This allows us to calculate the compensated value of the corresponding color at the current moment after the time lag, taking into account the effect of temperature on the color lag of each channel. The color of the LED display is then displayed using the compensation values ​​of the red, blue, and green channels at each future moment.

[0068] The schematic diagram of the process of obtaining the basic temperature influence deviation is as follows: Figure 2 shown.

[0069] To sum up, the embodiment of the application can accurately identify the abnormal mutation moment in the color gradient process by calculating the same-channel color difference between the RGB values of the electronic display screen at adjacent moments to construct the gradient significant coefficient of the color value corresponding to each moment; by the cross-correlation between the time sequence of the same-channel color in the RGB value of the electronic display screen and the temperature sequence, the lag of temperature influence is analyzed to obtain the color time lag, and the temperature interference degree of each channel color is constructed by combining the difference between the color change and the temperature change at each moment, so that the influence degree of temperature fluctuation on each channel color can be accurately analyzed, and a quantitative basis for independent compensation is provided; by the difference between the preset switching color actual value and the standard value, and the difference between the actual temperature and the reference temperature, the basic temperature influence deviation is constructed, so that the influence degree of temperature on color under different initial use temperatures can be considered, and the color can be more accurately compensated; by the basic temperature influence deviation, the difference between the temperature at each moment and the reference temperature, and the temperature interference degree of the abnormal moment, the compensation coefficient of each channel color is constructed, so that the three primary colors can be independently compensated, and then the phenomenon of color mutation in the color switching process of the electronic display screen is avoided, the display control effect of the electronic display screen is improved, and the problem of color mutation in the color gradient process caused by temperature change is avoided.

[0070] It should be noted that the above-mentioned embodiments of the application are in the order of description only, and do not represent the advantages and disadvantages of the embodiments. And the above describes the specific embodiments of the application. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multi-task processing and parallel processing are also possible or may be advantageous.

[0071] Each embodiment in the application is described in a progressive manner, and the same or similar parts of each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0072] The above-described embodiments are only used to illustrate the technical solutions of the application, but not to limit them; the technical solutions described in the above embodiments are modified, or some technical features are replaced, without changing the essence of the corresponding technical solutions out of the scope of the technical solutions of the embodiments of the application, which should be included in the protection scope of the application.

Claims

1. A method for controlling LED digital tube display for an electronic display screen, characterized in that: The method comprises the following steps: Preset the color switching sequence of the electronic display screen, obtain the standard values ​​of the three primary colors of the LED digital tube of the electronic display screen, and determine the preset standard values ​​of each switching color; collect the RGB value of the electronic display screen color and the temperature of the LED digital tube at each moment, and construct a color gradient matrix and temperature sequence; The color gradient matrix is ​​divided into submatrices based on the number of preset switching colors of the electronic display screen; a first abnormal value of each row vector in the submatrix is ​​calculated based on the abnormality of the distance between each row vector and its previous row vector; a first difference of each row vector is constructed based on the difference between the element values ​​in each row vector; and a gradient significance coefficient of each row vector is constructed based on the first abnormal value and the first difference; Abnormal row vectors are determined based on the gradient significance coefficients of all row vectors. The temperature interference degree of the color corresponding to each element in each row vector is determined based on the correlation between each column vector in the color gradient matrix and the temperature series at different time lags, as well as the dispersion of each element value in the first-order difference series of each column vector and the first-order difference series of the temperature series. Based on the difference between the last row vector in each submatrix and the standard value of the corresponding preset switching color, and the difference between the temperature data corresponding to the last row vector and the preset reference temperature, the basic temperature influence deviation of each channel color is constructed; Based on the basic temperature influence deviation, the difference between the temperature at each moment and the preset reference temperature, and the temperature interference degree of the abnormal row vector, a compensation coefficient for the color of each channel at each moment is constructed; based on the compensation coefficient, the compensation value of each channel color is determined and displayed on a digital tube.

2. The LED digital tube display control method for an electronic display screen according to claim 1, wherein: The submatrix division of the color gradient matrix based on the number of preset switching colors of the electronic display screen is specifically as follows: the number of preset switching colors is recorded as T, and the color gradient matrix is ​​divided into T+1 equal parts to obtain each submatrix.

3. The LED digital tube display control method for an electronic display screen according to claim 1, wherein: The first outlier value of each row vector is specifically: Calculate the distance between each row vector in the submatrix and the previous row vector, which is recorded as the first distance; use the first distance of all row vectors in the submatrix as the input of the anomaly detection algorithm, and output the outlier value corresponding to each row vector, which is recorded as the first outlier value.

4. The LED digital tube display control method for an electronic display screen according to claim 1, wherein: The first difference of the row vectors is specifically: Based on the difference between the elements in the j-th row vector of the i-th submatrix, the first color relative ratio, the second color relative ratio and the third color relative ratio of each row vector are constructed, which are respectively recorded as 、 and , the expressions are: 、 and ,in, are the R, G, and B color values ​​in the j-th row vector of the i-th submatrix respectively; is a preset minimum positive number; The first difference of the j-th row vector of the i-th submatrix is ​​recorded as , The expression is: ,in, 、 and are respectively the first color relative ratio value, the second color relative ratio value, and the third color relative ratio value of the j-1th row vector in the i-th sub-matrix.

5. The LED digital tube display control method for an electronic display screen according to claim 1, wherein: The gradual significant coefficient of each row vector is: the product of the first abnormal value and the first difference of each row vector.

6. The LED digital tube display control method for an electronic display screen according to claim 1, wherein: The process of determining the abnormal row vector is as follows: The third quartile of the gradient significant coefficients of all row vectors in the color gradient matrix is ​​obtained, and the row vectors corresponding to the gradient significant coefficients higher than the third quartile are recorded as abnormal row vectors.

7. The LED digital tube display control method for an electronic display screen according to claim 1, wherein: The process of obtaining the temperature interference degree of the color corresponding to each element in each row vector is as follows: In the color gradient matrix, the sequence composed of elements in the pth column vector is recorded as the pth color sequence; the pth color sequence and the temperature sequence are used as inputs of the cross-correlation function, the maximum value of the cross-correlation coefficient between the pth color sequence and the temperature sequence is obtained, and the time lag corresponding to the maximum value is used as the color lag of the pth column vector, recorded as ; The ratio of the maximum value to the color lag is recorded as the first ratio ; The row number range of the current sub-matrix in the color gradient matrix is ​​recorded as [a,b]; in the temperature sequence, the bit sequence range is [a- ,b- ] is composed of the temperature data in the current sub-matrix as the synchronous temperature sequence of the p-th color sequence; In the current sub-matrix, the mode of the first-order difference sequence of the p-th color sequence is used as the color gradient of the p-th color sequence, which is recorded as ; The mode of the first-order difference sequence of the synchronous temperature sequence is used as the temperature gradient of the p-th color sequence, recorded as ; The value of the j-1th element in the first-order difference sequence of the pth color sequence is recorded as , the value of the j-1th element in the first-order difference sequence of the synchronous temperature sequence is recorded as ; Calculate the temperature interference of the color corresponding to the pth element in the jth row vector of the current submatrix , The expression is: , where A preset minimum positive number.

8. The LED digital tube display control method for an electronic display screen according to claim 2, wherein: The process of obtaining the basic temperature influence deviation of each channel color is as follows: The sequence composed of the p-th channel values ​​in all color standard values ​​in the preset switching color is recorded as the standard switching sequence of the p-th channel color; the sequence composed of the p-th element value in the last row vector of the first T sub-matrices is recorded as the color switching sequence of the p-th channel color; the temperature data corresponding to the last row vector of the first T sub-matrices at the acquisition time is obtained, and the constructed sequence is recorded as the switching temperature sequence; the basic temperature influence deviation of the p-th channel color is recorded as , The expression is: , where 、 、 are the tth element in the color switching sequence of the pth channel color, the standard switching sequence of the pth channel color, and the switching temperature sequence; tem is the preset reference temperature; Among them, when the temperature at each moment is consistent with the reference temperature, Set the value of to 1.

9. The LED digital tube display control method for an electronic display screen according to claim 1, wherein: The expression of the compensation coefficient of each channel color at each moment is: , where Indicates the compensation coefficient of the p-th channel color at the v-th moment; is the normalization function; The difference between the digital tube temperature at time v and the preset reference temperature; The base temperature influence deviation of the p-th channel color; is the mean value of the temperature interference of the color corresponding to the pth element of all abnormal row vectors; Modify the factor for the preset weight.

10. The LED digital tube display control method for an electronic display screen according to claim 1, wherein: The compensation value of each channel color is determined based on the compensation coefficient and displayed on a digital tube, specifically: Determine the compensation coefficient of each channel color at the current moment; obtain the color lag corresponding to the pth channel color , the current moment will be in the future The p-th channel value in the color value that the electronic display screen needs to display at the moment is multiplied by the compensation coefficient of the p-th channel color at the current moment, and the calculated result is used as the future p-th channel value at the current moment. The color of the LED magic color digital tube is displayed through the compensation values ​​of the red, blue and green channels at each future moment.

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