Brightness adaptive cross-screen display method applied to spliced display

Abstract

This invention relates to the field of cross-screen display technology, and more particularly to a brightness-adaptive cross-screen display method applied to a video wall display, comprising: step S1, a central control module determining whether the stability of the video image is within an allowable range; step S2, the central control module adjusting the refresh rate of the video wall display, or making a preliminary determination of the smoothness of the video image, or making a preliminary determination of the integrity of the video image; step S3, the central control module adjusting the frequency of garbage collection in the running memory based on the difference in playback duration of the video image; step S4, the central control module making a preliminary adjustment of the actual magnification of the image based on the missing area of ​​the video image; step S5, the central control module making a secondary adjustment of the actual magnification of the image based on the overlapping area of ​​the images; this invention achieves improved stability of video display and improved display quality of video images on the video wall display.

Description

Technical Field

[0001] This invention relates to the field of cross-screen display technology, and in particular to a brightness-adaptive cross-screen display method for use in splicing displays. Background Technology

[0002] Large-screen display systems are typically composed of several spliced ​​screens. The splicing process often results in seams, and the brightness of different spliced ​​screens also varies. Since these seams and brightness differences can only be determined after on-site setup, and given the large number of display units, manual adjustment is extremely labor-intensive. Furthermore, due to production variations, it is sometimes difficult to adjust the brightness of all screens to the same range.

[0003] Chinese Patent Publication No. CN115602092A discloses a brightness-adaptive cross-screen display method and apparatus for video wall displays, comprising: real-time acquisition of the average brightness of the display area of ​​each video wall screen; and dynamically adjusting the grayscale value of the video stream transmitted to other video wall screens based on the average brightness difference between the display areas of each video wall screen and a reference screen, using the grayscale value of the video stream in the reference screen as a benchmark, so as to make the picture smooth between each video wall screen. This invention utilizes four dark corner photosensors around the perimeter of the video wall screen to measure the brightness of the area covered by the video wall image in real time, and dynamically adjusts the grayscale value of the video stream of each video wall screen based on this information. Therefore, the brightness-adaptive cross-screen display method and apparatus for video wall displays has the following problem: the inaccurate determination of the smoothness of the video image reflected by the playback duration leads to a decrease in the display stability of the video wall display. Summary of the Invention

[0004] To address this issue, the present invention provides a brightness-adaptive cross-screen display method for video wall displays, which overcomes the problem in the prior art where the inaccurate determination of the smoothness of video images reflected by the playback duration leads to a decrease in the display stability of video wall displays.

[0005] To achieve the above objectives, this invention provides a brightness-adaptive cross-screen display method for video wall displays, comprising: Step S1, upon completion of video wall display installation, performing a power-on test on the video wall display, acquiring the number of flicker times of several displays per unit time and the actual playback duration of the video image, the central control module calculating the average flicker count based on the number of flicker times of several displays per unit time, and determining whether the stability of the video image is within the allowable range based on the average flicker count; Step S2, when the stability of the video image is determined to be below the allowable range, the central control module adjusts the refresh rate of the video wall display to the corresponding frequency, or makes a preliminary determination on whether the smoothness of the video image is within the allowable range, or makes a preliminary determination on whether the integrity of the video image is within the allowable range; Step S3, after completing the process of adjusting the video image... In the initial determination of whether the smoothness of the video image is within the allowable range, the central control module performs a secondary determination based on the difference in playback duration of the video image, and adjusts the garbage collection frequency of the running memory to the corresponding frequency when the smoothness of the video image is lower than the allowable range in the secondary determination; in step S4, when the initial determination of whether the integrity of the video image is within the allowable range is completed, the central control module performs a secondary determination based on the missing area of ​​the video image, and adjusts the actual magnification of the image to the first corresponding magnification when the integrity of the video image is lower than the allowable range in the secondary determination; in step S5, when the initial adjustment of the actual magnification of the image is completed, the central control module controls the image overlap area obtained by the visual detector to adjust the actual magnification of the image to the second corresponding magnification.

[0006] Furthermore, the central control module determines whether the display stability is within the allowable range based on three methods according to the average number of flickering events.

[0007] The first determination method is that the central control module determines that the display stability is within the allowable range under a preset first number of flashes;

[0008] The second determination method is that the central control module determines that the display stability is lower than the allowable range under the preset second number of flashes, and adjusts the refresh rate of the splicing display to the corresponding frequency by calculating the difference between the average number of flashes and the preset first number of flashes.

[0009] The third determination method is that the central control module determines that the display stability is lower than the allowable range under the condition of a preset third number of flashes, initially determines that the smoothness of the video image is lower than the allowable range, and makes a secondary determination on whether the smoothness of the video image is within the allowable range based on the difference in the playback duration of the video image.

[0010] The fourth determination method is that the central control module determines that the display stability is lower than the allowable range under the preset fourth flash count condition, initially determines that the integrity of the video image is lower than the allowable range, and makes a secondary determination on whether the integrity of the video image is within the allowable range based on the missing area of ​​the image.

[0011] The preset first flash count condition is that the average flash count is less than or equal to the preset first flash count; the preset second flash count condition is that the average flash count is greater than the preset first flash count and less than or equal to the preset second flash count; the preset third flash count condition is that the average flash count is greater than the preset second flash count and less than or equal to the preset third flash count; the preset first flash count is less than the preset second flash count, and the preset second flash count is less than the preset third flash count;

[0012] The formula for calculating the average number of flashes is as follows:

[0013]

[0014] Where N is the average number of flashes, N q Let q be the number of times the q-th display flashes per unit time, and n be the total number of displays, where n is a natural number greater than or equal to 1.

[0015] Furthermore, the central control module, under a preset second flash count condition, determines two adjustment methods for the refresh rate of the video wall display based on the difference between the average flash count and the preset first flash count.

[0016] The first adjustment method is that the central control module adjusts the refresh rate of the splicing display to the first refresh rate using a preset first refresh rate adjustment coefficient under the condition of a preset first flicker count difference.

[0017] The second adjustment method is that the central control module adjusts the refresh rate of the splicing display to the second refresh rate using a preset second refresh rate adjustment coefficient under the condition of a preset second flicker count difference.

[0018] The preset first flicker count difference condition is that the difference between the average flicker count and the preset first flicker count is less than or equal to the preset flicker count difference; the preset second flicker count difference condition is that the difference between the average flicker count and the preset first flicker count is greater than the preset flicker count difference; and the preset first refresh frequency adjustment coefficient is less than the preset second refresh frequency adjustment coefficient.

[0019] Furthermore, the central control module employs two secondary determination methods to assess whether the smoothness of the video image is within the allowable range based on the difference in playback duration of the video image under a preset third flash count condition.

[0020] The first secondary determination method is that the central control module determines that the smoothness of the video image is within the allowable range under the preset first difference condition;

[0021] The second secondary determination method is that the central control module determines that the smoothness of the video image is lower than the allowable range under the preset second difference condition, and adjusts the garbage cleaning frequency of the running memory to the corresponding frequency by calculating the difference between the playback duration difference of the video image and the preset duration difference.

[0022] The first preset difference condition is that the difference in playback duration of the video images is less than or equal to a preset duration difference; the second preset difference condition is that the difference in playback duration of the video images is greater than a preset duration difference.

[0023] The formula for calculating the difference in playback duration of the video images is:

[0024] T = Ta - Tb

[0025] Where T is the difference in playback duration of the video image, Ta is the actual playback duration of the video image, and Tb is the standard playback duration of the video image.

[0026] Furthermore, the central control module, under a preset second difference condition, determines two frequency adjustment methods for the garbage collection frequency of the running memory based on the difference between the playback duration difference of the video image and a preset duration difference.

[0027] The first frequency adjustment method is that the central control module adjusts the garbage cleaning frequency of the running memory to the first cleaning frequency using a preset first cleaning frequency adjustment coefficient under the condition of a preset first difference value.

[0028] The second frequency adjustment method is that the central control module adjusts the garbage cleaning frequency of the running memory to the second cleaning frequency using a preset second cleaning frequency adjustment coefficient under the preset second difference value.

[0029] The first preset difference condition is that the difference between the playback duration difference of the video image and the preset duration difference is less than or equal to the preset duration difference; the second preset difference condition is that the difference between the playback duration difference of the video image and the preset duration difference is greater than the preset duration difference; and the first preset cleaning frequency adjustment coefficient is less than the second preset cleaning frequency adjustment coefficient.

[0030] Furthermore, the central control module employs two secondary determination methods to assess whether the integrity of the video image is within the allowable range based on the area of ​​image loss under a preset fourth flash count.

[0031] The first method for secondary integrity determination is that the central control module determines that the integrity of the video image is within the allowable range under the condition of a preset first missing area.

[0032] The second method for determining the integrity of a video image is as follows: the central control module determines that the integrity of the video image is below the allowable range under the condition of a preset second missing area, and adjusts the actual magnification of the image to the corresponding magnification by calculating the difference between the missing area of ​​the image and the preset missing area.

[0033] The first preset missing area condition is that the image missing area is less than or equal to a preset missing area; the second preset missing area condition is that the image missing area is greater than a preset missing area.

[0034] Furthermore, the central control module, under the condition of a preset second missing area, determines two adjustment methods for the actual magnification of the image based on the difference between the missing area and the preset missing area.

[0035] The first method of image magnification adjustment is that the central control module adjusts the actual magnification of the image to the first magnification using a preset second magnification adjustment coefficient under the condition of a preset first missing area difference.

[0036] The second method of image magnification adjustment is that the central control module adjusts the actual image magnification to the second magnification using a preset first magnification adjustment coefficient under the condition of a preset second missing area difference.

[0037] The first preset missing area difference condition is that the difference between the image missing area and the preset missing area is less than or equal to the preset missing area difference; the second preset missing area difference condition is that the difference between the image missing area and the preset missing area is greater than the preset missing area difference; and the first preset magnification adjustment coefficient is less than the second preset magnification adjustment coefficient.

[0038] Furthermore, the central control module, after adjusting the actual magnification of the image, determines whether the accuracy of the video image information display is within the allowable range based on the overlapping area of ​​the images using two methods.

[0039] The first method for determining accuracy is that the central control module determines, under the condition of a preset first overlapping area, that the information display accuracy of the video image is within the allowable range;

[0040] The second accuracy determination method is that the central control module determines that the information display accuracy of the video image is lower than the allowable range under the preset second overlapping area condition, and adjusts the actual magnification of the image to the corresponding magnification by calculating the difference between the image overlapping area and the preset overlapping area.

[0041] The first preset overlap area condition is that the image overlap area is less than or equal to a preset overlap area; the second preset overlap area condition is that the image overlap area is greater than a preset overlap area.

[0042] Furthermore, the central control module, under the condition of a preset second overlapping area, determines two secondary adjustment methods for the actual magnification of the image based on the difference between the image overlapping area and the preset overlapping area.

[0043] The first secondary adjustment method is that the central control module adjusts the actual magnification of the image to the third magnification using a preset third magnification adjustment coefficient under the preset first overlapping area difference condition.

[0044] The second secondary adjustment method is that the central control module adjusts the actual magnification of the image to the fourth magnification using a preset fourth magnification adjustment coefficient under the preset second overlapping area difference condition.

[0045] The first preset overlap area difference condition is that the difference between the image overlap area and the preset overlap area is less than or equal to the preset overlap area difference; the second preset overlap area difference condition is that the difference between the image overlap area and the preset overlap area is greater than the preset overlap area difference; and the third preset magnification adjustment coefficient is less than the fourth preset magnification adjustment coefficient.

[0046] Compared with the prior art, the beneficial effects of the present invention are as follows: the display method of the present invention, by setting a preset first flicker count condition, a preset second flicker count condition, and a preset third flicker count condition, allows the central control module to determine the display stability. Since unreasonable settings of various parameters of the spliced ​​display can cause screen flickering and reduce the playback quality of the spliced ​​display, the central control module adjusts the refresh rate of the spliced ​​display by setting a preset first flicker count difference condition, a preset second flicker count difference condition, a preset first refresh rate adjustment coefficient, and a preset second refresh rate adjustment coefficient. By increasing the refresh rate of the spliced ​​display, the impact of a low refresh rate on the cross-screen display quality is reduced, further improving the stability of the video display and the display quality of the video image on the spliced ​​display.

[0047] The display method of this invention calculates the playback duration difference of video images based on the playback duration of the displayed file and sets preset first and second difference conditions. The central control module determines whether the smoothness of the video images is within the allowable range. Due to unreasonable memory ratio, playback stutters occur, reducing playback quality. By setting preset first and second difference conditions, preset first and second cleanup frequency adjustment coefficients, the central control module adjusts the garbage collection frequency of the running memory. By increasing the garbage collection frequency of the running memory, the memory ratio of useless processes is reduced, the preloading amount of file playback is increased, and the stability of video display and the display quality of video images on the splicing display are further improved.

[0048] The display method of the present invention sets a preset first missing area condition and a preset second missing area condition. The central control module determines the integrity of the video image. If the missing area is too large, it will reduce the information transmission capability of the splicing display. By setting a preset first missing area difference condition, a preset second missing area difference condition, a preset first magnification adjustment coefficient, and a preset second magnification adjustment coefficient, the central control module adjusts the actual magnification of the image. By reducing the actual magnification of the image, the gaps in the image connection are reduced, the continuity of the display is improved, and the stability of the video display and the display quality of the video image of the splicing display are further improved. Attached Figure Description

[0049] Figure 1 This is an overall flowchart of the brightness-adaptive cross-screen display method applied to a splicing display according to an embodiment of the present invention;

[0050] Figure 2 This is a detailed flowchart of step S2 of the brightness adaptive cross-screen display method applied to a splicing display according to an embodiment of the present invention;

[0051] Figure 3 This is a detailed flowchart of step S3 of the brightness adaptive cross-screen display method applied to a splicing display according to an embodiment of the present invention;

[0052] Figure 4 This is a flowchart illustrating step S4 of the brightness-adaptive cross-screen display method applied to a splicing display according to an embodiment of the present invention. Detailed Implementation

[0053] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0054] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0055] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 4 The diagrams shown are, respectively, an overall flowchart, a detailed flowchart of step S2, a detailed flowchart of step S3, and a detailed flowchart of step S4 of a brightness-adaptive cross-screen display method applied to a video wall display according to an embodiment of the present invention. An embodiment of the present invention provides a brightness-adaptive cross-screen display method applied to a video wall display, comprising:

[0056] Step S1: When the splicing display is installed, the splicing display is powered on for testing. The number of flickering times of several displays per unit time and the actual playback duration of the video image are obtained. The central control module calculates the average number of flickering times based on the number of flickering times of several displays per unit time, and determines whether the stability of the video image is within the allowable range based on the average number of flickering times.

[0057] Step S2: When it is determined that the stability of the video image is lower than the allowable range, the central control module adjusts the refresh rate of the splicing display to the corresponding frequency, or makes a preliminary judgment on whether the smoothness of the video image is within the allowable range, or makes a preliminary judgment on whether the integrity of the video image is within the allowable range.

[0058] Step S3: When completing the initial judgment on whether the smoothness of the video image is within the allowable range, the central control module performs a second judgment on whether the smoothness of the video image is within the allowable range based on the difference in the playback duration of the video image, and adjusts the garbage collection frequency of the running memory to the corresponding frequency when the smoothness of the video image is lower than the allowable range in the second judgment.

[0059] Step S4: When completing the initial determination of whether the integrity of the video image is within the allowable range, the central control module performs a second determination on whether the integrity of the video image is within the allowable range based on the missing area of ​​the video image, and adjusts the actual magnification of the image to the first corresponding magnification when the integrity of the video image is lower than the allowable range in the second determination.

[0060] In step S5, after the initial adjustment of the actual magnification of the image is completed, the central control module controls the image overlap area obtained by the visual detector to adjust the actual magnification of the image to the second corresponding magnification.

[0061] Specifically, the missing area of ​​the image is the difference between the area of ​​the video image displayed on two adjacent displays after splicing and the area of ​​the original video image;

[0062] Specifically, the visual display portion is positioned above the splicing display;

[0063] Specifically, the overlapping area of ​​the images is the overlapping area of ​​the video images displayed on two adjacent displays after the splicing is completed;

[0064] Specifically, step S2 includes:

[0065] Step S21: The central control module determines that the stability of the video image is below the allowable range based on the average number of flickering events;

[0066] Step S22: The central control module adjusts the refresh rate of the splicing display to the corresponding frequency based on the average number of flashes under the preset second number of flashes.

[0067] Step S23: The central control module makes a preliminary judgment on whether the smoothness of the video image is within the allowable range under the condition of a preset third number of flashes;

[0068] Step S24: The central control module makes a preliminary determination on whether the integrity of the video image is within the allowable range under the condition of a preset fourth flash count;

[0069] Specifically, step S3 includes:

[0070] Step S31: The central control module performs a secondary judgment on whether the smoothness of the video image is within the allowable range based on the difference in playback duration of the video image.

[0071] Step S32: When the central control module determines for the second time that the smoothness of the video image is below the allowable range, it adjusts the garbage collection frequency of the running memory to the corresponding frequency.

[0072] Specifically, step S4 includes:

[0073] Step S41: The central control module performs a secondary judgment on whether the integrity of the video image is within the allowable range based on the missing area of ​​the video image.

[0074] In step S41, when the central control module determines that the integrity of the video image is below the allowable range, it adjusts the actual magnification of the image to the first corresponding magnification.

[0075] Please continue reading. Figure 2 As shown, the central control module uses three methods to determine whether the display stability is within the allowable range based on the average number of flickering events.

[0076] The first determination method is that the central control module determines that the display stability is within the allowable range under a preset first number of flashes;

[0077] The second determination method is that the central control module determines that the display stability is lower than the allowable range under the preset second number of flashes, and adjusts the refresh rate of the splicing display to the corresponding frequency by calculating the difference between the average number of flashes and the preset first number of flashes.

[0078] The third determination method is that the central control module determines that the display stability is lower than the allowable range under the condition of a preset third number of flashes, initially determines that the smoothness of the video image is lower than the allowable range, and makes a secondary determination on whether the smoothness of the video image is within the allowable range based on the difference in the playback duration of the video image.

[0079] The fourth determination method is that the central control module determines that the display stability is lower than the allowable range under the preset fourth flash count condition, initially determines that the integrity of the video image is lower than the allowable range, and makes a secondary determination on whether the integrity of the video image is within the allowable range based on the missing area of ​​the image.

[0080] The preset first flash count condition is that the average flash count is less than or equal to the preset first flash count; the preset second flash count condition is that the average flash count is greater than the preset first flash count and less than or equal to the preset second flash count; the preset third flash count condition is that the average flash count is greater than the preset second flash count and less than or equal to the preset third flash count; the preset first flash count is less than the preset second flash count, and the preset second flash count is less than the preset third flash count;

[0081] The formula for calculating the average number of flashes is as follows:

[0082]

[0083] Where N is the average number of flashes, N q Let q be the number of times the q-th display flashes per unit time, and n be the total number of displays, where n is a natural number greater than or equal to 1.

[0084] Specifically, the average number of flashes is denoted as N, the preset first number of flashes is denoted as N1, the preset second number of flashes is denoted as N2, and the preset third number of flashes is denoted as N3, where N1 < N2 < N3. The difference between the average number of flashes and the preset first number of flashes is denoted as ΔN, and ΔN is set to N - N1.

[0085] Please continue reading. Figure 2 As shown, the central control module determines two adjustment methods for the refresh rate of the video wall display based on the difference between the average number of flashes and the preset first number of flashes, under a preset second number of flashes.

[0086] The first adjustment method is that the central control module adjusts the refresh rate of the splicing display to the first refresh rate using a preset first refresh rate adjustment coefficient under the condition of a preset first flicker count difference.

[0087] The second adjustment method is that the central control module adjusts the refresh rate of the splicing display to the second refresh rate using a preset second refresh rate adjustment coefficient under the condition of a preset second flicker count difference.

[0088] The preset first flicker count difference condition is that the difference between the average flicker count and the preset first flicker count is less than or equal to the preset flicker count difference; the preset second flicker count difference condition is that the difference between the average flicker count and the preset first flicker count is greater than the preset flicker count difference; and the preset first refresh frequency adjustment coefficient is less than the preset second refresh frequency adjustment coefficient.

[0089] Specifically, the preset flicker count difference is denoted as △N0, the preset first refresh frequency adjustment coefficient is denoted as α1, the preset second refresh frequency adjustment coefficient is denoted as α2, where 1 < α1 < α2, the refresh frequency of the video wall is denoted as H, the adjusted refresh frequency of the video wall is denoted as H', and H' is set to H × αi, where αi is the preset i-th refresh frequency adjustment coefficient, and i is set to 1, 2.

[0090] The display method of this invention sets preset first flicker count conditions, preset second flicker count conditions, preset third flicker count conditions, and preset fourth flicker count conditions. The central control module determines the display stability. Because unreasonable settings of various parameters of the spliced ​​display cause screen flickering and reduce the playback quality of the spliced ​​display, the central control module adjusts the refresh rate of the spliced ​​display by setting preset first flicker count difference conditions, preset second flicker count difference conditions, preset first refresh rate adjustment coefficient, and preset second refresh rate adjustment coefficient. By increasing the refresh rate of the spliced ​​display, the impact of a low refresh rate on cross-screen display quality is reduced, further improving the stability of video display and the display quality of video images on the spliced ​​display.

[0091] Please continue reading. Figure 3 As shown, the central control module uses two secondary determination methods to determine whether the smoothness of the video image is within the allowable range based on the difference in playback duration of the video image under a preset third flash count condition.

[0092] The first secondary determination method is that the central control module determines that the smoothness of the video image is within the allowable range under the preset first difference condition;

[0093] The second secondary determination method is that the central control module determines that the smoothness of the video image is lower than the allowable range under the preset second difference condition, and adjusts the garbage cleaning frequency of the running memory to the corresponding frequency by calculating the difference between the playback duration difference of the video image and the preset duration difference.

[0094] The first preset difference condition is that the difference in playback duration of the video images is less than or equal to a preset duration difference; the second preset difference condition is that the difference in playback duration of the video images is greater than a preset duration difference.

[0095] Specifically, the difference in playback duration of the video image is denoted as T, the difference in preset duration is denoted as T0, and the difference between the difference in playback duration of the video image and the difference in preset duration is denoted as △T. △T is set to T-T0.

[0096] The formula for calculating the difference in playback duration of the video images is:

[0097] T = Ta - Tb

[0098] Where T is the difference in playback duration of the video image, Ta is the actual playback duration of the video image, and Tb is the preset standard playback duration of the video image.

[0099] Please continue reading. Figure 3 As shown, the central control module, under a preset second difference condition, determines two frequency adjustment methods for the garbage collection frequency of the running memory based on the difference between the playback duration difference of the video image and the preset duration difference.

[0100] The first frequency adjustment method is that the central control module adjusts the garbage cleaning frequency of the running memory to the first cleaning frequency using a preset first cleaning frequency adjustment coefficient under the condition of a preset first difference value.

[0101] The second frequency adjustment method is that the central control module adjusts the garbage cleaning frequency of the running memory to the second cleaning frequency using a preset second cleaning frequency adjustment coefficient under the preset second difference value.

[0102] The first preset difference condition is that the difference between the playback duration difference of the video image and the preset duration difference is less than or equal to the preset duration difference; the second preset difference condition is that the difference between the playback duration difference of the video image and the preset duration difference is greater than the preset duration difference; and the first preset cleaning frequency adjustment coefficient is less than the second preset cleaning frequency adjustment coefficient.

[0103] Specifically, the preset duration difference is denoted as △T0, the preset first cleaning frequency adjustment coefficient is denoted as β1, the preset second cleaning frequency adjustment coefficient is denoted as β2, 1 < β1 < β2, the running memory garbage cleaning frequency is denoted as P, the adjusted running memory garbage cleaning frequency is denoted as P', and P' is set to P × (1 + βj) / 2, where βj is the preset j-th cleaning frequency adjustment coefficient, and j is set to 1, 2.

[0104] The display method of this invention calculates the playback duration difference of video images based on the playback duration of the displayed file and sets preset first and second difference conditions. The central control module determines whether the smoothness of the video images is within the allowable range. Due to unreasonable memory ratio, playback stutters occur, reducing playback quality. By setting preset first and second difference conditions, preset first and second cleanup frequency adjustment coefficients, the central control module adjusts the garbage collection frequency of the running memory. By increasing the garbage collection frequency of the running memory, the memory ratio of useless processes is reduced, the preloading amount of file playback is increased, and the stability of video display and the display quality of video images on the splicing display are further improved.

[0105] Please continue reading. Figure 4 As shown, the central control module uses two secondary determination methods to determine whether the integrity of the video image is within the allowable range based on the area of ​​image loss under a preset fourth flash count.

[0106] The first method for secondary integrity determination is that the central control module determines that the integrity of the video image is within the allowable range under the condition of a preset first missing area.

[0107] The second method for determining the integrity of a video image is as follows: the central control module determines that the integrity of the video image is below the allowable range under the condition of a preset second missing area, and adjusts the actual magnification of the image to the corresponding magnification by calculating the difference between the missing area of ​​the image and the preset missing area.

[0108] The first preset missing area condition is that the image missing area is less than or equal to a preset missing area; the second preset missing area condition is that the image missing area is greater than a preset missing area.

[0109] Specifically, the missing area of ​​the image is denoted as S, the preset missing area is denoted as S', the difference between the missing area of ​​the image and the preset missing area is denoted as △S, and △S is set to S-S'.

[0110] Please continue reading. Figure 4 As shown, the central control module determines two adjustment methods for the actual magnification of the image based on the difference between the image's missing area and the preset missing area, under the condition of a preset second missing area.

[0111] The first method of image magnification adjustment is that the central control module adjusts the actual magnification of the image to the first magnification using a preset second magnification adjustment coefficient under the condition of a preset first missing area difference.

[0112] The second method of image magnification adjustment is that the central control module adjusts the actual image magnification to the second magnification using a preset first magnification adjustment coefficient under the condition of a preset second missing area difference.

[0113] The first preset missing area difference condition is that the difference between the image missing area and the preset missing area is less than or equal to the preset missing area difference; the second preset missing area difference condition is that the difference between the image missing area and the preset missing area is greater than the preset missing area difference; and the first preset magnification adjustment coefficient is less than the second preset magnification adjustment coefficient.

[0114] Specifically, the preset missing area difference is denoted as △S0, the preset first magnification adjustment coefficient is denoted as δ1, the preset second magnification adjustment coefficient is denoted as δ2, where 0 < δ1 < δ2 < 1, the actual image magnification is denoted as R, the adjusted actual image magnification is denoted as R', and R' is set to R × δg, where δg is the preset g-th magnification adjustment coefficient, and g = 1, 2.

[0115] The display method of the present invention sets a preset first missing area condition and a preset second missing area condition. The central control module determines the integrity of the video image. If the missing area is too large, it will reduce the information transmission capability of the splicing display. By setting a preset first missing area difference condition, a preset second missing area difference condition, a preset first magnification adjustment coefficient, and a preset second magnification adjustment coefficient, the central control module adjusts the actual magnification of the image. By reducing the actual magnification of the image, the gaps in the image connection are reduced, the continuity of the display is improved, and the stability of the video display and the display quality of the video image of the splicing display are further improved.

[0116] Please continue reading. Figure 1 As shown, the central control module uses two methods to determine whether the accuracy of the video image information display is within the allowable range based on the overlapping area of ​​the images after adjusting the actual magnification of the image.

[0117] The first method for determining accuracy is that the central control module determines, under the condition of a preset first overlapping area, that the information display accuracy of the video image is within the allowable range;

[0118] The second accuracy determination method is that the central control module determines that the information display accuracy of the video image is lower than the allowable range under the preset second overlapping area condition, and adjusts the actual magnification of the image to the corresponding magnification by calculating the difference between the image overlapping area and the preset overlapping area.

[0119] The first preset overlap area condition is that the image overlap area is less than or equal to a preset overlap area; the second preset overlap area condition is that the image overlap area is greater than a preset overlap area.

[0120] Specifically, the overlapping area of ​​the images is denoted as M, the preset overlapping area is denoted as M0, the difference between the overlapping area of ​​the images and the preset overlapping area is denoted as ΔM, and ΔM is set to M-M0.

[0121] Please continue reading. Figure 1 As shown, the central control module, under the condition of a preset second overlapping area, determines two secondary adjustment methods for the actual magnification of the image based on the difference between the image overlapping area and the preset overlapping area.

[0122] The first secondary adjustment method is that the central control module adjusts the actual magnification of the image to the third magnification using a preset third magnification adjustment coefficient under the preset first overlapping area difference condition.

[0123] The second secondary adjustment method is that the central control module adjusts the actual magnification of the image to the fourth magnification using a preset fourth magnification adjustment coefficient under the preset second overlapping area difference condition.

[0124] The first preset overlap area difference condition is that the difference between the image overlap area and the preset overlap area is less than or equal to the preset overlap area difference; the second preset overlap area difference condition is that the difference between the image overlap area and the preset overlap area is greater than the preset overlap area difference; and the third preset magnification adjustment coefficient is less than the fourth preset magnification adjustment coefficient.

[0125] Specifically, the preset overlap area difference is denoted as △M0, the preset third magnification adjustment coefficient is denoted as δ3, the preset fourth magnification adjustment coefficient is denoted as δ4, 1 < δ3 < δ4, and the actual magnification of the image after the second adjustment is denoted as R”. R” is set to R’×δk, where δk is the preset k-th magnification adjustment coefficient, and k = 3, 4.

[0126] Example 1

[0127] In this embodiment, the preset missing area difference △S0=8cm 2 The preset first magnification adjustment coefficient δ1 = 0.6, the preset second magnification adjustment coefficient δ2 = 0.8, and the actual image magnification is denoted as R = 1.6.

[0128] In this embodiment, ΔS = 6cm was obtained. 2 The central control module determines that △S≤△S0 and uses δ2 to adjust the actual magnification of the image. The adjusted actual magnification is recorded as R'=1.6×0.8=1.28.

[0129] After obtaining ΔS, the central control module of the display method described in this invention uses the corresponding adjustment coefficient to adjust the actual magnification of the image, thereby increasing the display range of the image and improving the display integrity of the video image, further improving the stability of the video display of the splicing display and the display quality of the video image.

[0130] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0131] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cross-screen display method for brightness adaptation applied to a tiled display, characterized in that, include: Step S1: When the splicing display is installed, the splicing display is powered on for testing. The number of flickering times of several displays per unit time and the actual playback duration of the video image are obtained. The central control module calculates the average number of flickering times based on the number of flickering times of several displays per unit time, and determines whether the stability of the video image is within the allowable range based on the average number of flickering times. Step S2: When it is determined that the stability of the video image is lower than the allowable range, the central control module adjusts the refresh rate of the splicing display to the corresponding frequency, or makes a preliminary judgment on whether the smoothness of the video image is within the allowable range, or makes a preliminary judgment on whether the integrity of the video image is within the allowable range. Step S3: When completing the initial judgment on whether the smoothness of the video image is within the allowable range, the central control module performs a second judgment on whether the smoothness of the video image is within the allowable range based on the difference in the playback duration of the video image, and adjusts the garbage collection frequency of the running memory to the corresponding frequency when the smoothness of the video image is lower than the allowable range in the second judgment. Step S4: When completing the initial determination of whether the integrity of the video image is within the allowable range, the central control module performs a second determination on whether the integrity of the video image is within the allowable range based on the missing area of ​​the video image, and adjusts the actual magnification of the image to the first corresponding magnification when the integrity of the video image is lower than the allowable range in the second determination. Step S5: When the initial adjustment of the actual magnification of the image is completed, the central control module controls the image overlap area obtained by the visual detector to adjust the actual magnification of the image to the second corresponding magnification. The central control module determines whether the display stability is within the allowable range based on the average number of flickers, including: The first determination method is that the central control module determines that the display stability is within the allowable range under a preset first number of flashes; The second determination method is that the central control module determines that the display stability is lower than the allowable range under the preset second number of flashes, and adjusts the refresh rate of the splicing display to the corresponding frequency by calculating the difference between the average number of flashes and the preset first number of flashes. The third determination method is that the central control module determines that the display stability is lower than the allowable range under the condition of a preset third number of flashes, initially determines that the smoothness of the video image is lower than the allowable range, and makes a secondary determination on whether the smoothness of the video image is within the allowable range based on the difference in the playback duration of the video image. The fourth determination method is that the central control module determines that the display stability is lower than the allowable range under the preset fourth flash count condition, initially determines that the integrity of the video image is lower than the allowable range, and makes a secondary determination on whether the integrity of the video image is within the allowable range based on the missing area of ​​the image. The preset first flash count condition is that the average flash count is less than or equal to the preset first flash count; the preset second flash count condition is that the average flash count is greater than the preset first flash count and less than or equal to the preset second flash count; the preset third flash count condition is that the average flash count is greater than the preset second flash count and less than or equal to the preset third flash count; the preset first flash count is less than the preset second flash count, and the preset second flash count is less than the preset third flash count; The formula for calculating the average number of flashes is as follows: Wherein, N is the average number of flickers, N q is the number of flickers of the qth block of the display in a unit of time, n is the total number of blocks of the display, and n is a natural number greater than or equal to 1.

2. The cross-screen display method for brightness adaptation applied to a tiled display according to claim 1, wherein, The central control module determines two adjustment methods for the refresh rate of the video wall display based on the difference between the average number of flashes and the preset first number of flashes, under a preset second number of flashes. The first adjustment method is that the central control module adjusts the refresh rate of the splicing display to the first refresh rate using a preset first refresh rate adjustment coefficient under the condition of a preset first flicker count difference. The second adjustment method is that the central control module adjusts the refresh rate of the splicing display to the second refresh rate using a preset second refresh rate adjustment coefficient under the condition of a preset second flicker count difference. The preset first flicker count difference condition is that the difference between the average flicker count and the preset first flicker count is less than or equal to the preset flicker count difference; the preset second flicker count difference condition is that the difference between the average flicker count and the preset first flicker count is greater than the preset flicker count difference; and the preset first refresh frequency adjustment coefficient is less than the preset second refresh frequency adjustment coefficient. 3.The cross-screen display method for brightness adaptation applied to a tiled display according to claim 1, wherein, The central control module employs two secondary determination methods to assess whether the smoothness of the video image is within an acceptable range based on the difference in playback duration, under a preset third flash count condition. The first secondary determination method is that the central control module determines that the smoothness of the video image is within the allowable range under the preset first difference condition; The second secondary determination method is that the central control module determines that the smoothness of the video image is lower than the allowable range under the preset second difference condition, and adjusts the garbage cleaning frequency of the running memory to the corresponding frequency by calculating the difference between the playback duration difference of the video image and the preset duration difference. The first preset difference condition is that the difference in playback duration of the video images is less than or equal to a preset duration difference; the second preset difference condition is that the difference in playback duration of the video images is greater than a preset duration difference.

4. The brightness-adaptive cross-screen display method for splicing displays according to claim 3, characterized in that, The formula for calculating the difference in playback duration of the video images is: Where T is the difference in playback duration of the video image, Ta is the actual playback duration of the video image, and Tb is the standard playback duration of the video image.

5. The brightness-adaptive cross-screen display method for splicing displays according to claim 3, characterized in that, The central control module, under a preset second difference condition, determines two frequency adjustment methods for the garbage collection frequency of the running memory based on the difference between the playback duration difference of the video image and a preset duration difference. The first frequency adjustment method is that the central control module adjusts the garbage cleaning frequency of the running memory to the first cleaning frequency using a preset first cleaning frequency adjustment coefficient under the condition of a preset first difference value. The second frequency adjustment method is that the central control module adjusts the garbage cleaning frequency of the running memory to the second cleaning frequency using a preset second cleaning frequency adjustment coefficient under the preset second difference value. The first preset difference condition is that the difference between the playback duration difference of the video image and the preset duration difference is less than or equal to the preset duration difference; the second preset difference condition is that the difference between the playback duration difference of the video image and the preset duration difference is greater than the preset duration difference; and the first preset cleaning frequency adjustment coefficient is less than the second preset cleaning frequency adjustment coefficient.

6. The brightness-adaptive cross-screen display method for splicing displays according to claim 1, characterized in that, The central control module employs two secondary determination methods to assess whether the integrity of the video image is within acceptable limits based on the area of ​​missing parts of the image, under a preset fourth flash count condition. The first method for secondary integrity determination is that the central control module determines that the integrity of the video image is within the allowable range under the condition of a preset first missing area. The second method for determining the integrity of a video image is as follows: the central control module determines that the integrity of the video image is below the allowable range under the condition of a preset second missing area, and adjusts the actual magnification of the image to the corresponding magnification by calculating the difference between the missing area of ​​the image and the preset missing area. The first preset missing area condition is that the image missing area is less than or equal to a preset missing area; the second preset missing area condition is that the image missing area is greater than a preset missing area.

7. The brightness-adaptive cross-screen display method for splicing displays according to claim 6, characterized in that, The central control module, under a preset second missing area condition, determines two adjustment methods for the actual magnification of the image based on the difference between the image missing area and the preset missing area. The first method of image magnification adjustment is that the central control module adjusts the actual magnification of the image to the first magnification using a preset second magnification adjustment coefficient under the condition of a preset first missing area difference. The second method of image magnification adjustment is that the central control module adjusts the actual image magnification to the second magnification using a preset first magnification adjustment coefficient under the condition of a preset second missing area difference. The first preset missing area difference condition is that the difference between the image missing area and the preset missing area is less than or equal to the preset missing area difference; the second preset missing area difference condition is that the difference between the image missing area and the preset missing area is greater than the preset missing area difference; and the first preset magnification adjustment coefficient is less than the second preset magnification adjustment coefficient.

8. The brightness-adaptive cross-screen display method for splicing displays according to claim 7, characterized in that, The central control module uses two methods to determine whether the accuracy of the video image information display is within the allowable range based on the overlapping area of ​​the images after adjusting the actual magnification of the image. The first method for determining accuracy is that the central control module determines, under the condition of a preset first overlapping area, that the information display accuracy of the video image is within the allowable range; The second accuracy determination method is that the central control module determines that the information display accuracy of the video image is lower than the allowable range under the preset second overlapping area condition, and adjusts the actual magnification of the image to the corresponding magnification by calculating the difference between the image overlapping area and the preset overlapping area. The first preset overlap area condition is that the image overlap area is less than or equal to a preset overlap area; the second preset overlap area condition is that the image overlap area is greater than a preset overlap area.

9. The brightness-adaptive cross-screen display method for splicing displays according to claim 8, characterized in that, The central control module, under the condition of a preset second overlapping area, determines two secondary adjustment methods for the actual magnification of the image based on the difference between the image overlapping area and the preset overlapping area. The first secondary adjustment method is that the central control module adjusts the actual magnification of the image to the third magnification using a preset third magnification adjustment coefficient under the preset first overlapping area difference condition. The second secondary adjustment method is that the central control module adjusts the actual magnification of the image to the fourth magnification using a preset fourth magnification adjustment coefficient under the preset second overlapping area difference condition. The first preset overlap area difference condition is that the difference between the image overlap area and the preset overlap area is less than or equal to the preset overlap area difference; the second preset overlap area difference condition is that the difference between the image overlap area and the preset overlap area is greater than the preset overlap area difference; and the third preset magnification adjustment coefficient is less than the fourth preset magnification adjustment coefficient.

Images