Splicing display equipment and splicing display control method

Abstract

The embodiment of the invention discloses tiled display equipment and a tiled display control method. The tiled display equipment can realize synchronous display of a plurality of display devices through a controller, the controller comprises a sending port and a time-sharing module, and the tiled display equipment comprises at least two different display devices. Through the time-sharing module, a plurality of sending ports can send a plurality of video signals corresponding to the same frame of image at different time, so that different delay time is set for different display devices, and a plurality of display devices can display the same frame of image at the same time; therefore, the problem that the display pictures of the tiled display device are not synchronous in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a splicing display device and a splicing display control method. Background Technology

[0002] In a market environment where the demand for larger display sizes is increasing, video wall displays offer advantages such as large screen size and low maintenance costs. However, when different display devices are spliced ​​together, the different drive chains result in varying delays in data processing, leading to asynchrony in the displayed images. Summary of the Invention

[0003] The embodiments of this application provide a splicing display device and a splicing display control method, which can at least solve the problem of asynchronous display screens in the above-mentioned splicing display device.

[0004] In one aspect, embodiments of this application provide a splicing display device, including a controller and a plurality of dissimilar display devices. The controller includes: a transmitting module having a transmitting port for transmitting video signals to the plurality of display devices; and a time-division module, signal-connected to the transmitting module to enable the plurality of transmitting ports to transmit a plurality of video signals corresponding to the same frame image at dissimilar times; wherein the time difference between two video signals of the same frame image is greater than or equal to the reciprocal of the frame rate of the video signals; the splicing display device includes: a plurality of receiving ports configured to receive the plurality of video signals corresponding to the same frame image at dissimilar times; wherein the display devices correspond to the receiving ports.

[0005] In an optional embodiment, the plurality of dissimilar display devices include a first display device and a second display device, wherein the transmitting module includes a first transmitting port and a second transmitting port; the time-division module controls the first transmitting port to transmit the video signal of a target frame to the first display device at a first moment; the time-division module controls the second transmitting port to transmit the video signal of the target frame to the second display device at a second moment; the splicing display device further includes: a first receiving port, corresponding to the first display device, configured to receive the video signal of the target frame at the first moment; a second receiving port, corresponding to the second display device, configured to receive the video signal of the target frame at the second moment; the time difference between the first moment and the second moment is defined as a first delay duration, the first delay duration satisfying: ΔT1=M1×X+Y1; where ΔT1 is the first delay duration, X is the reciprocal of the frame rate; Y1 is a first compensation time less than the reciprocal of the frame rate, and M1 is an integer greater than or equal to 0; M1 and Y1 are not simultaneously 0.

[0006] In one optional embodiment, the first display device includes an LCD display device, the LCD display device comprising: an LCD display panel for displaying images; an LCD driving circuit electrically connected to the LCD display panel; a timing controller electrically connected to the LCD driving circuit; and a system-on-a-chip (SoC) electrically connected to the timing controller and the first receiving port, respectively; wherein the video signal of the target frame is sequentially transmitted to the LCD display panel for display via the first receiving port, the SoC, the timing controller, and the LCD driving circuit; the second display device includes an LED display device, the LED display device comprising: an LED display panel for displaying images; an LED driving circuit electrically connected to the LED display panel; and a receiving card electrically connected to the LED driving circuit and the second receiving port, respectively; wherein the video signal of the target frame is sequentially transmitted to the LED display panel for display via the second receiving port, the receiving card, and the LED driving circuit.

[0007] In an optional embodiment, the plurality of dissimilar display devices further include a third display device, the third display device being of the same type as the first display device, and the third display device being of a different type from the second display device; wherein, the transmitting module further includes a third transmitting port; the time-division module controls the third transmitting port to transmit the video signal of the target frame to the third display device at a third time; the splicing display device further includes: a third receiving port, corresponding to the third display device, configured to receive the video signal of the target frame at the third time; the time difference between the first time and the third time is defined as a second delay duration, the second delay duration satisfying: ΔT2=M2×X+Y2; where ΔT2 is the second delay duration, X is the reciprocal of the frame rate; Y2 is a first compensation time less than the reciprocal of the frame rate, and M2 is an integer greater than or equal to 0; M2 and Y2 are not simultaneously 0.

[0008] In one optional embodiment, the first display device includes an LCD display device, the second display device includes an LED display device, and the third display device includes an LCD display device. The line scanning direction of the first display device and the third display device is perpendicular to the splicing edge, and the second display device is disposed between the first display device and the third display device.

[0009] In an optional embodiment, the plurality of dissimilar display devices further include a fourth display device, the fourth display device being of the same type as the first display device and the fourth display device being of a different type from the second display device; wherein, the transmitting module further includes a fourth transmitting port; the time-division module controls the fourth transmitting port to transmit the video signal of the target frame to the fourth display device at a first moment; the splicing display device further includes: a fourth receiving port, corresponding to the fourth display device, configured to receive the video signal of the target frame at the fourth moment.

[0010] In one optional embodiment, the first display device includes an LCD display device, the second display device includes an LED display device, and the fourth display device includes an LCD display device. The line scanning directions of the first display device and the fourth display device are parallel to the splicing edge, and the second display device is disposed between the first display device and the fourth display device.

[0011] In another aspect, embodiments of this application also provide a splicing display control method, comprising: receiving a video signal corresponding to an image frame; sending multiple video signals corresponding to the same frame image to a splicing display device at different times; wherein the splicing display device includes at least two different display devices; and the time difference between two video signals of the same frame image is greater than or equal to the reciprocal of the frame rate of the video signal.

[0012] In an optional embodiment, sending multiple video signals corresponding to the same frame image to the splicing display device at different times includes: sending the video signal of a target frame to a first display device at a first moment; and sending the video signal of the target frame to a second display device at a second moment; wherein the time difference between the first moment and the second moment is defined as a first delay duration, and the first delay duration satisfies: ΔT1=M1×X+Y1; where ΔT1 is the first delay duration, X is the reciprocal of the frame rate; Y1 is a first compensation time less than the reciprocal of the frame rate, and M1 is an integer greater than or equal to 0; M1 and Y1 are not simultaneously 0.

[0013] In an optional embodiment, the method for determining the first delay duration includes: when the first display device includes an LCD display device, the second display device includes an LED display device, and the line scanning direction of the LCD display device is parallel to the splicing edge, simultaneously sending alternating first image frames and second image frames to the first display device and the second display device; acquiring the voltage waveforms output by the first display device and the second display device respectively during the switching display process of the first image frame and the second image frame; determining the size of M1 based on the difference of the voltage waveforms; sending two video signals corresponding to the target frame to the first display device and the second display device at different times based on the size of M1, so that the first display device and the second display device simultaneously display the image screen corresponding to the target frame; adjusting the compensation time in the dynamic scanning state of the image screen corresponding to the target frame until the dynamic scanning lines of the first display device and the second display device are continuously a horizontal line to obtain the size of Y1; and determining the first delay duration ΔT1 based on the size of M1 and the size of Y1.

[0014] In an optional embodiment, the method for determining the first delay duration includes: when the first display device includes an LCD display device, the second display device includes an LED display device, and the line scanning direction of the LCD display device is perpendicular to the splicing edge, simultaneously sending alternating first image frames and second image frames to the first display device and the second display device; acquiring the voltage waveforms output by the first display device and the second display device respectively during the switching display process of the first image frame and the second image frame; determining the size of M1 based on the difference of the voltage waveforms; sending two video signals corresponding to the target frame to the first display device and the second display device at different times based on the size of M1, so that the first display device and the second display device simultaneously display the image screen corresponding to the target frame; determining the size of Y1 by making the display screen of the second display device consistent with the first scan line or the last scan line of the first display device; and determining the first delay duration ΔT1 based on the size of M1 and the size of Y1.

[0015] In an optional embodiment, sending multiple video signals corresponding to the same frame image to the splicing display device at different times further includes: sending the video signal of the target frame to a third display device at a third time; wherein the time difference between the first time and the third time is defined as a second delay duration, and the second delay duration satisfies: ΔT2=M2×X+Y2; wherein ΔT2 is the second delay duration, X is the reciprocal of the frame rate; Y2 is a first compensation time less than the reciprocal of the frame rate, and M2 is an integer greater than or equal to 0; M2 and Y2 are not simultaneously 0.

[0016] In an optional embodiment, the method for determining the second delay duration includes: when the third display device includes the LCD display device, the row scanning direction of the LCD display device is perpendicular to the splicing edge, and the first scan line of the first display device and the last scan line of the third display device are simultaneously sent to the first display device and the third display device alternately switching between a first image frame and a second image frame; acquiring the voltage waveforms output by the first display device and the third display device respectively during the switching display process of the first image frame and the second image frame; determining the size of M2 based on the difference in the voltage waveforms; sending two video signals corresponding to the target frame to the first display device and the third display device at different times based on the size of M2, so that the first display device and the third display device simultaneously display the image screen corresponding to the target frame; determining the size of Y2 by keeping the scan screen of the last scan line of the first display device consistent with the scan screen of the next scan line of the third display device; and determining the second delay duration ΔT2 based on the size of M2 and the size of Y2.

[0017] The beneficial effects provided by the embodiments of this application include at least the following:

[0018] The embodiments of this application control a video wall display device via a controller to achieve synchronous display. The video wall display device includes at least two distinct display devices. Video signals are sent to multiple display devices through the controller's transmission port. The controller's time-division module allows multiple transmission ports to send multiple video signals corresponding to the same frame at different times. This enables different delay times to be set for different display devices, allowing multiple display devices to simultaneously display the same frame, thus solving the problem of asynchronous display in related technologies. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the driving link between LCD display devices and LED display devices in related technologies;

[0020] Figure 2 This is a schematic diagram of the structure of a controller and a splicing display device provided in an optional embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of another controller and splicing display device provided in an optional embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the structure of another controller and splicing display device provided in an optional embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the structure of another controller and splicing display device provided in an optional embodiment of this application;

[0024] Figure 6 This is a flowchart of a splicing display control method provided in an optional embodiment of this application;

[0025] Figure 7 This is a simulation diagram provided in an optional embodiment of this application;

[0026] Figure 8 This is a simulation diagram provided in an optional embodiment of this application.

[0027] Explanation of reference numerals in the attached figures

[0028] 100. Controller;

[0029] 101. Time-sharing module; 102. Transmission module; 1021. First transmission port; 1022. Second transmission port; 1023. Third transmission port; 1024. Fourth transmission port; 1025. Fifth transmission port; 1026. Sixth transmission port;

[0030] 200. Display device;

[0031] 201, First display device; 202, Second display device; 203, Third display device; 204, Fourth display device; 205, Fifth display device; 206, Sixth display device; 2011, First receiving port; 2021, Second receiving port; 2031, Third receiving port; 2041, Fourth receiving port; 2051, Fifth receiving port; 2061, Sixth receiving port. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The described technical solutions are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0033] Furthermore, in the embodiments of this application, "multiple" refers to two or more. The terms "first" and "second," etc., in the embodiments of this application are used to distinguish different technical features and do not indicate any order, quantity, or importance.

[0034] The various embodiments provided in this application are similar, and features in different embodiments can be combined with each other.

[0035] The order in which the following embodiments are described is not intended to limit the preferred order of the embodiments.

[0036] In a market environment where the demand for larger display sizes is increasing, video wall displays offer advantages such as large screen size and low maintenance costs. However, when different display devices are spliced ​​together, the different drive chains result in varying delays in data processing, leading to asynchrony in the displayed images.

[0037] For example, mixing LCD (Liquid Crystal Display) and Mini LED (Submillimeter Light Emitting Diode) direct display panels can solve the problem of black borders in the active area (AA area) of LCD splicing screens, and also solve the graininess problem of Mini LED direct display panels at close viewing angles, enabling splicing display devices to achieve true full-screen display.

[0038] However, LCD and LED are still different light-emitting media, and their display driving paths are different. If LCD and LED simultaneously display the same image, the different driving paths will lead to different data processing delays. (See reference...) Figure 1 As shown, in the LED display link, conventional receiver cards and LED driver ICs will buffer the input signal source signal for one frame, while LCDs will not buffer the input source frame. Therefore, the output image of the LCD is significantly faster than that of the LED, resulting in display asynchrony.

[0039] Furthermore, the different driving and scanning methods of LCD and LED cause display tearing in dynamic scenes. For example, in one implementation, LCD scans line by line from one side of the flexible circuit board (Chip On Film, or COF) to the other, taking approximately 8.3ms from the first line to the last. In contrast, LED uses Pulse Width Modulation (PWM) technology, which has a higher scanning frequency and can scan all zones simultaneously, from the first line to the last line of each zone, taking approximately 0.52ms from the first line to the last, a significant difference from LCD.

[0040] Reference Figures 2 to 5 As shown, in order to solve the above-mentioned technical problems, the embodiments of this application provide a splicing display device, including a controller 100 and a splicing display device 200.

[0041] A controller 100 is used to control a video wall display device 200, wherein the video wall display device 200 includes at least two different display devices. The video wall display device 200 also includes: multiple receiving ports configured to receive multiple video signals corresponding to the same frame image at different times; wherein the display devices correspond to the receiving ports.

[0042] Reference Figure 2 As shown, the controller 100 includes a transmission module 102 and a time-sharing module 101.

[0043] Specifically, the transmitting module 102 has a transmitting port for transmitting video signals to multiple display devices; the time-division module 101 is connected to the transmitting module 102 to enable the multiple transmitting ports to transmit multiple video signals corresponding to the same frame image at different times; wherein the time difference between two video signals of the same frame image is greater than or equal to the reciprocal of the frame rate of the video signal.

[0044] The display device involved in the embodiments of this application can be integrated into a display device, which can be a television, smartphone, tablet computer, laptop computer, desktop computer, smart speaker, smartwatch, etc., but is not limited to these. The display device can include a display panel and a driving link. The display panel refers to the component used to display images, which can include many pixel units. Each pixel unit can emit light, display color, or reflect light to generate an image. The type of display panel can be set according to the actual situation. For example, the display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED) panel, a sub-millimeter light-emitting diode display panel (Mini-LED, also known as a mini light-emitting diode display panel), or a micro light-emitting diode display panel (Micro-LED). The embodiments of this application are not limited here.

[0045] The splicing display device 200 can be composed of multiple LCD display devices spliced ​​together, multiple LED display devices spliced ​​together, or LCD and LED display devices spliced ​​together alternately. Alternatively, it can consist of several LCD display devices spliced ​​together and then connected to several LED display devices. This application embodiment does not limit the specific method used. In practical applications, if at least two display devices in the splicing display device 200 have different drive link delays, the technical solution provided in this application embodiment can be applied.

[0046] This application uses the example of interleaved splicing of LCD and LED display devices to illustrate the following. Since the frame buffers of the driving links of LCD and LED display devices are different, the screen delay difference between LCD and LED display devices is at least greater than one frame. Therefore, the time difference between two video signals of the same frame image is greater than or equal to the reciprocal of the frame rate of the video signal.

[0047] Reference Figure 3As shown, in an optional embodiment, the transmitting module 102 includes a first transmitting port 1021 and a second transmitting port 1022, which are respectively used to transmit video signals to the first display device 201 and the second display device 202.

[0048] The timing of video signal transmission by the transmitting module 102 is controlled by the time-division module 101. The time-division module 101 controls the first transmitting port 1021 to transmit a target frame's video signal at a first moment; the time-division module 101 controls the second transmitting port 1022 to transmit the target frame's video signal at a second moment; the time difference between the first moment and the second moment is defined as a first delay duration, which satisfies the following:

[0049] △T1=M1×X+Y1;

[0050] Where △T1 is the first delay duration, X is the reciprocal of the frame rate; Y1 is the first compensation time which is less than the reciprocal of the frame rate, and M1 is an integer greater than or equal to 0; M1 and Y1 are not both 0.

[0051] In an optional embodiment, the transmitting module 102 further includes a fourth transmitting port 1024 for transmitting video signals to the fourth display device 204; wherein the time-division module 101 controls the third transmitting port 1023 to transmit the video signal of the target frame at a first moment.

[0052] Reference Figures 3 to 5 As shown, the video signal is transmitted to the first receiving port 2011 through the first transmitting port 1021, to the second receiving port 2021 through the second transmitting port 1022, to the third receiving port 2031 through the third transmitting port 1023, to the fourth receiving port 2041 through the fourth transmitting port 1024, to the fifth receiving port 2051 through the fifth transmitting port 1025, and to the sixth receiving port 2061 through the sixth transmitting port 1026.

[0053] Reference Figure 3 As shown, if the splicing display device 200 includes two display devices, namely the first display device 201 and the second display device 202, taking the first display device 201 as an LCD display device and the second display device 202 as an LED display device as an example, the splicing edge of the two is parallel to the line scanning direction of the LCD, that is, the short side of the LCD is spliced. Since the receiving card and driver chip of the LED display device will buffer image frames, M1 is an integer greater than 0 in this case.

[0054] If the splicing display device 200 includes two display devices, namely the first display device 201 and the fourth display device 204, taking the first display device 201 as an LCD display device and the fourth display device 204 as an LCD display device as an example, the splicing edge of the two is parallel to the line scanning direction of the LCD, that is, the short side of the LCD is spliced. If the two have the same driving method, theoretically there will be no situation where there is a relative delay of one reciprocal of the frame rate. In this case, M1 can be 0.

[0055] If the splicing display device 200 includes three display devices, namely the first display device 201, the second display device 202, and the fourth display device 204, taking the first display device 201 as an LCD display device, the second display device 202 as an LED display device, and the fourth display device 204 as an LCD display device as an example, the splicing method of the three display devices is that the LCD and LED are spliced ​​alternately, and the splicing edge is parallel to the line scanning direction of the LCD, that is, the short side of the LCD is spliced. If the same video source is input, the display image of the LED will be delayed by several frames relative to the LCD. Therefore, M1 can be a positive integer, that is, after sending the video signal of the target frame to the LED, it is delayed by the reciprocal of M1 frame rate before being sent to the LCD. When the LCD and LED display the same frame of image, observe the dynamic scan lines (move lines) of the two, fine-tune the compensation time until the dynamic scan lines of the two are on the same horizontal plane, and determine the value of the compensation time Y1.

[0056] The specific debugging process can be achieved through the following steps:

[0057] Step 101: The video source plays a sequence of images that alternate between the first and second image frames. The greater the color difference between the first and second image frames, the greater the difference in voltage waveforms captured on the LCD driving side and the LED driving side, making it easier to obtain the relative delay time between the display devices. In this embodiment, full-frame black and full-frame white image frames are used for switching. The switching cycle should be greater than the length of one frame displayed on the LCD. For example, at 60Hz, the scanning time for one LCD frame is approximately 16.6ms, so the switching cycle between the first and second image frames can be set to 18ms.

[0058] Step 102: Simultaneously capture the output voltage waveforms of the LCD's driving circuit and the LED's driving circuit using the detection unit. During the transition from a completely black screen to a completely white screen, the difference between the LCD and LED waveforms in the first line of the white screen can be identified. Furthermore, the LCD's output voltage waveform shows significant differences between adjacent frames, making it easy to identify the relative output delay in frames, i.e., the reciprocal of the frame rate. Since the measurement involves the output voltage waveform of the driving circuit, an oscilloscope can be used as the detection unit, or a logic analyzer can be used.

[0059] Step 103: By measuring the phase difference between the output waveforms of the LCD and LED, the value of M1 can be determined, so that the display images of the LCD and LED are synchronized within the same frame.

[0060] Step 104: When the LCD and LED display the same frame of image, fine-tune the compensation time Y1 of the LCD using the Move Line frame as a reference. This can be done by visual observation, machine recognition, or program recognition, until the dynamically moving horizontal lines displayed on the LCD and LED can form a continuous horizontal line. The fine-tuning range can be ±1 frame, with an accuracy of 1µs.

[0061] Simulation results show that the subjective synchronization effect is best when ΔT1 = 0.5 times the reciprocal of the frame rate.

[0062] refer to Figure 4 As shown, in an optional embodiment, the transmitting module 102 further includes a third transmitting port 1023 for transmitting video signals to the third display device 203.

[0063] The time-division module 101 controls the third transmission port 1023 to send the video signal of the target frame to the third display device 203 at the third moment; the time difference between the first moment and the third moment is defined as the second delay duration, which satisfies the following:

[0064] △T2=M2×X+Y2;

[0065] Where △T2 is the second delay duration, X is the reciprocal of the frame rate; Y2 is the first compensation time which is less than the reciprocal of the frame rate, and M2 is an integer greater than or equal to 0; M2 and Y2 are not both 0.

[0066] Reference Figure 4 As shown, if the splicing display device 200 includes two display devices, namely the first display device 201 and the second display device 202, taking the first display device 201 as an LCD display device and the second display device 202 as an LED display device as an example, the splicing edge of the two is perpendicular to the line scanning direction of the LCD, that is, the long edge of the LCD is spliced. Since the receiving card and driver chip of the LED display device will buffer image frames, M2 is an integer greater than 0 in this case.

[0067] If the splicing display device 200 includes two display devices, namely the first display device 201 and the third display device 203, taking the first display device 201 and the third display device 203 as examples, their splicing edge is perpendicular to the line scanning direction of the LCD, that is, the long side of the LCD is spliced. At the same time, the last line of the first display device 201 (closer to the COF side) is adjacent to the first line of the third display device 203 (away from the COF side). Although their driving methods are the same, in order to ensure the synchronous display of the screen, the last line of the first display device 201 needs to be consistent with the first line of the third display device 203. Therefore, M2 is an integer greater than 0 in this case.

[0068] If the splicing display device 200 includes three display devices, namely the first display device 201, the second display device 202, and the third display device 203, taking the first display device 201 as an LCD display device, the second display device 202 as an LED display device, and the third display device 203 as an LCD display device as an example, the splicing method of the three display devices is that the LCD and LED are spliced ​​alternately, and the splicing edge is perpendicular to the line scanning direction of the LCD, that is, the long side of the LCD is spliced. If the same video source is input, the display image of the LED will be delayed by several frames relative to the LCD. At the same time, the scan image of the LED must be consistent with the last scan line of the left LCD or the first scan line of the right LCD. For example, the first display device 201 LCD needs to have a one-frame delay relative to the third display device 203 LCD. At the same time, the scan image of the second display device LED must be consistent with the last scan line of the left LCD or the first scan line of the right LCD.

[0069] If the splicing display device 200 includes five display devices, namely the first display device 201, the second display device 202, the third display device 203, the fifth display device 205, and the sixth display device 206, the splicing method of the three display devices is that LCDs and LEDs are spliced ​​alternately, and the splicing edge is perpendicular to the line scanning direction of the LCD, that is, the long edge of the LCD is spliced. At the same time, the last line of the scan of the first display device 201 is adjacent to the first line of the scan of the third display device 203, and the last line of the scan of the third display device 203 is adjacent to the first line of the scan of the sixth display device 206. In this case, taking the third display device 203 as a reference, the LCD of the first display device 201 needs to have a one-frame delay relative to the LCD of the third display device 203, and the LCD of the sixth display device 206 needs to have a one-frame delay relative to the LCD of the third display device 203. By adjusting Y2, the scan image of the LED of the second display device 202 should be consistent with the first line of the scan of the LCD of the third display device, and the scan image of the LED of the fifth display device 205 should be consistent with the last line of the scan of the LCD of the third display device.

[0070] Reference Figure 5 As shown, if the splicing display device 200 includes five display devices, namely the first display device 201, the second display device 202, the third display device 203, the fifth display device 205, and the sixth display device 206, and the splicing method of the three display devices is that LCDs and LEDs are spliced ​​alternately, and the splicing edge is perpendicular to the line scanning direction of the LCD, that is, the long side of the LCD is spliced. At the same time, the last line of the scan of the first display device 201 is adjacent to the last line of the scan of the third display device 203, and the first line of the scan of the third display device 203 is adjacent to the first line of the scan of the sixth display device 206. In this case, it is not necessary to differentiate the reciprocal delay of the frame rate of different LCDs. It is only necessary to adjust Y2 so that the scan image of the LED of the second display device 202 is consistent with the last line of the scan of the LCD, and the scan image of the LED of the fifth display device 205 is consistent with the first line of the scan of the LCD.

[0071] After the above debugging, the values ​​of M1 or M2 can be fixed directly. When the platform is debugged in the future, only the compensation time of Y1 or Y2 needs to be fine-tuned, thereby shortening the subsequent debugging time and reducing the complexity of later maintenance operations.

[0072] The controller 100 enables multiple transmission ports to send multiple video signals corresponding to the same frame image at different times, thereby setting different delay times for different display devices so that multiple display devices can display the same frame image simultaneously, thus solving the problem of asynchronous display in splicing display devices 200 in related technologies.

[0073] In some embodiments, the splicing display device 200 further includes:

[0074] The first receiving port 2011, corresponding to the first display device 201, is configured to receive the video signal of a target frame at a first moment;

[0075] The second receiving port 2021, corresponding to the second display device 202, is configured to receive the video signal of the target frame at a second time.

[0076] The time difference between the first moment and the second moment is defined as the first delay duration, which satisfies: △T1=M1×X+Y1; where △T1 is the first delay duration, X is the reciprocal of the frame rate, Y1 is the first compensation time which is less than the reciprocal of the frame rate, and M1 is an integer greater than or equal to 0; M1 and Y1 are not both 0.

[0077] In some embodiments, the splicing display device 200 further includes:

[0078] The third receiving port 2031, corresponding to the third display device 203, is configured to receive the video signal of the target frame at the third moment.

[0079] The time difference between the first and third moments is defined as the second delay duration, which satisfies the following:

[0080] △T2=M2×X+Y2;

[0081] Where △T2 is the second delay duration, X is the reciprocal of the frame rate; Y2 is the first compensation time which is less than the reciprocal of the frame rate, and M2 is an integer greater than or equal to 0; M2 and Y2 are not both 0.

[0082] In some embodiments, the splicing display device 200 further includes:

[0083] The fourth receiving port 2041, corresponding to the fourth display device 204, is configured to receive the video signal of the target frame at a first moment.

[0084] In some embodiments, the first display device 201 includes an LCD display device, which includes: an LCD display panel for displaying images; an LCD driving circuit electrically connected to the LCD display panel; a timing controller 100 electrically connected to the LCD driving circuit; and a system-on-a-chip electrically connected to the timing controller 100 and the first receiving port 2011, respectively; wherein, the video signal of the target frame is sequentially transmitted to the LCD display panel for display through the first receiving port 2011, the system-on-a-chip, the timing controller 100, and the LCD driving circuit.

[0085] The second display device 202 includes an LED display device, which includes: an LED display panel for displaying images; an LED driving circuit electrically connected to the LED display panel; and a receiving card electrically connected to the LED driving circuit and the second receiving port 2021, respectively. The video signal of the target frame is sequentially transmitted to the LED display panel for display through the second receiving port 2021, the receiving card, and the LED driving circuit.

[0086] In some embodiments, the first display device 201 includes an LCD display device, the second display device 202 includes an LED display device, and the third display device 203 includes an LCD display device. The line scanning direction of the first display device 201 and the third display device 203 is perpendicular to the splicing edge, and the second display device 202 is disposed between the first display device 201 and the third display device 203.

[0087] In some embodiments, the first display device 201 includes an LCD display device, the second display device 202 includes an LED display device, and the fourth display device 204 includes an LCD display device. The line scanning directions of the first display device 201 and the fourth display device 204 are parallel to the splicing edge, and the second display device 202 is disposed between the first display device 201 and the third display device 203.

[0088] Reference Figure 6 As shown, according to another aspect of the embodiments of this application, a splicing display control method is also provided, including:

[0089] Step 601: Receive the video signal corresponding to the image frame;

[0090] Step 602: Send multiple video signals corresponding to the same frame image to the splicing display device at different times; wherein the splicing display device includes at least two different display devices.

[0091] In some embodiments, the time difference between two video signals of the same frame is greater than or equal to the reciprocal of the frame rate of the video signal.

[0092] In some embodiments, step 602 above can be implemented by the following steps:

[0093] Send a video signal of a target frame to the first display device at the first moment;

[0094] The video signal of the target frame is sent to the second display device at the second moment;

[0095] The time difference between the first moment and the second moment is defined as the first delay duration, which satisfies: △T1=M1×X+Y1; where △T1 is the first delay duration, X is the reciprocal of the frame rate, Y1 is the first compensation time which is less than the reciprocal of the frame rate, and M1 is an integer greater than or equal to 0; M1 and Y1 are not both 0.

[0096] In some embodiments, the method for determining the first delay duration includes:

[0097] When the first display device includes an LCD display device, the second display device includes an LED display device, and the row scanning direction of the LCD display device is parallel to the splicing edge, the first image frame and the second image frame that are alternately switched are sent to the first display device and the second display device at the same time.

[0098] Acquire the voltage waveforms output by the first display device and the second display device respectively during the switching display process of the first image frame and the second image frame;

[0099] The value of M1 is determined based on the difference in voltage waveforms;

[0100] Based on the size of M1, two video signals corresponding to the target frame are sent to the first display device and the second display device at different times, so that the first display device and the second display device simultaneously display the image corresponding to the target frame.

[0101] In the dynamic scanning state of the image frame corresponding to the target frame, the compensation time is adjusted until the dynamic scanning lines of the first display device and the second display device are continuously a horizontal line, and the size of Y1 is obtained.

[0102] The first delay duration ΔT1 is determined based on the size of M1 and the size of Y1.

[0103] In some embodiments, the method for determining the first delay duration includes:

[0104] When the first display device includes an LCD display device, the second display device includes an LED display device, and the row scanning direction of the LCD display device is perpendicular to the splicing edge, the first image frame and the second image frame that are alternately switched are sent to the first display device and the second display device at the same time.

[0105] Acquire the voltage waveforms output by the first display device and the second display device respectively during the switching display process of the first image frame and the second image frame;

[0106] The value of M1 is determined based on the difference in voltage waveforms;

[0107] Based on the size of M1, two video signals corresponding to the target frame are sent to the first display device and the second display device at different times, so that the first display device and the second display device simultaneously display the image corresponding to the target frame.

[0108] The size of Y1 is determined by aligning the display screen of the second display device with the first or last line of the scan of the first display device.

[0109] The first delay duration ΔT1 is determined based on the size of M1 and the size of Y1.

[0110] In an optional embodiment, step 602 above can also be implemented by the following steps:

[0111] The video signal of the target frame is sent to the third display device at the third moment;

[0112] The time difference between the first moment and the third moment is defined as the second delay duration, which satisfies: △T2=M2×X+Y2; where △T2 is the second delay duration, X is the reciprocal of the frame rate, Y2 is the first compensation time which is less than the reciprocal of the frame rate, and M2 is an integer greater than or equal to 0; M2 and Y2 are not both 0.

[0113] In some embodiments, the method for determining the second delay duration includes:

[0114] When the third display device includes an LCD display device, the row scanning direction of the LCD display device is perpendicular to the splicing edge, and the first row of the first display device and the last row of the third display device are scanned, the first image frame and the second image frame that are alternately switched are sent to the first display device and the third display device at the same time.

[0115] Acquire the voltage waveforms output by the first display device and the third display device respectively during the switching display process of the first image frame and the second image frame;

[0116] The size of M2 is determined based on the difference in voltage waveforms;

[0117] Based on the size of M2, two video signals corresponding to the target frame are sent to the first display device and the third display device at different times, so that the first display device and the third display device simultaneously display the image corresponding to the target frame.

[0118] The size of Y2 is determined by keeping the last line of the scan of the first display device consistent with the first line of the scan of the next third display device.

[0119] The second delay duration ΔT2 is determined based on the size of M2 and the size of Y2.

[0120] After adjusting the relative delay time between different display devices in the splicing display device using the splicing display control method provided in the above embodiments, an effect with almost no delay visible to the naked eye can be achieved. (Refer to...) Figure 7 and Figure 8 As shown, Figure 7 To display the synchronized video of water droplets falling after debugging, Figure 8 The image displayed after debugging the synchronized display, showing a black-to-white screen.

[0121] By using the above-mentioned splicing display control method, multiple transmission ports send multiple video signals corresponding to the same frame image at different times, thereby setting different delay times for different display devices so that multiple display devices can display the same frame image simultaneously, thus solving the problem of asynchronous display of splicing display devices in related technologies.

[0122] It should be understood that, in practice, the above modules can be implemented as independent entities or can be combined arbitrarily to be implemented as the same or several entities.

[0123] Those skilled in the art will understand that the above program code can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0124] Therefore, embodiments of this application provide a computer-readable storage medium storing program code that can be loaded by a processor to execute the steps of any of the splicing display control methods provided in the embodiments of this application.

[0125] For example, the program code can perform the following steps:

[0126] Receive video signals corresponding to image frames;

[0127] Multiple video signals corresponding to the same frame of image are sent to a splicing display device at different times; wherein the splicing display device includes at least two different display devices.

[0128] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0129] For the specific implementation methods and corresponding beneficial effects of each of the above operations, please refer to the detailed description of the above embodiments, which will not be repeated here.

[0130] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A tiled display device, characterized by, The display device comprises a controller and a plurality of different display devices, the controller comprising: a sending module having a plurality of sending ports for sending video signals to a plurality of said display devices; a time-sharing module connected to the sending module to make a plurality of said video signals corresponding to the same frame image sent by a plurality of said sending ports at different times; wherein the time difference between two said video signals of the same frame image is greater than or equal to the inverse of the frame rate of the video signal; The display device comprises: a plurality of receiving ports configured to receive a plurality of said video signals corresponding to the same frame image at different times; wherein the display device corresponds to the receiving port.

2. The tiled display apparatus of claim 1, wherein, A plurality of different said display devices include a first display device and a second display device, wherein, the sending module includes a first sending port and a second sending port; the time-sharing module controls the first sending port to send the video signal of a target frame to the first display device at a first time; the time-sharing module controls the second sending port to send the video signal of the target frame to the second display device at a second time; The display device further comprises: a first receiving port corresponding to the first display device, configured to receive the video signal of the target frame at the first time; a second receiving port corresponding to the second display device, configured to receive the video signal of the target frame at the second time; The time difference between the first time and the second time is defined as the first delay time, which satisfies: △T1=M1×X+Y1; wherein △T1 is the first delay time, X is the inverse of the frame rate; Y1 is a first compensation time less than the inverse of the frame rate, M1 is an integer greater than or equal to 0; M1 and Y1 cannot be 0 at the same time.

3. The display device of claim 2, wherein the first display device comprises an LCD display device, which comprises: an LCD display panel for displaying image frames; an LCD drive circuit electrically connected to the LCD display panel; a timing controller electrically connected to the LCD drive circuit; a system on chip electrically connected to the timing controller and the first receiving port, respectively; wherein the video signal of the target frame is sequentially transmitted to the LCD display panel for display through the first receiving port, the system on chip, the timing controller and the LCD drive circuit; the second display device comprises an LED display device, which comprises: an LED display panel for displaying image frames; an LED drive circuit electrically connected to the LED display panel; a receiving card electrically connected to the LED drive circuit and the second receiving port, respectively; wherein the video signal of the target frame is sequentially transmitted to the LED display panel for display through the second receiving port, the receiving card and the LED drive circuit.

4. The tiled display apparatus of claim 2, wherein, The multiple different display devices further include a third display device, the third display device is of the same type as the first display device, and the third display device is of a different type from the second display device; wherein, The sending module further includes a third sending port; The time division module controls the third sending port to send the video signal of the target frame to the third display device at a third time; The tiled display device further includes: A third receiving port corresponding to the third display device, configured to receive the video signal of the target frame at the third time; A time difference between the first time and the third time is defined as a second delay duration, and the second delay duration satisfies: △T2=M2×X+Y2; wherein, △T2 is the second delay duration, X is the reciprocal of the frame rate, Y2 is a first compensation time smaller than the reciprocal of the frame rate, and M2 is an integer greater than or equal to 0; the M2 and Y2 are not zero at the same time.

5. The tiled display apparatus of claim 4, wherein, The first display device includes an LCD display device, the second display device includes an LED display device, the third display device includes an LCD display device, and the row scanning directions of the first display device and the third display device are perpendicular to the tiled edge, and the second display device is arranged between the first display device and the third display device.

6. The tiled display apparatus of claim 2, wherein, The multiple different display devices further include a fourth display device, the fourth display device is of the same type as the first display device, and the fourth display device is of a different type from the second display device; wherein, The sending module further includes a fourth sending port; The time division module controls the fourth sending port to send the video signal of the target frame to the fourth display device at a first time; The tiled display device further includes: A fourth receiving port corresponding to the fourth display device, configured to receive the video signal of the target frame at the fourth time.

7. The tiled display apparatus of claim 6, wherein, The first display device includes an LCD display device, the second display device includes an LED display device, the fourth display device includes an LCD display device, and the row scanning directions of the first display device and the fourth display device are parallel to the tiled edge, and the second display device is arranged between the first display device and the fourth display device.

8. A tiled display control method, characterized by, It includes: Receiving a video signal corresponding to an image frame; Sending multiple video signals corresponding to the same frame image to a tiled display device at different times; The tiled display device includes at least two different display devices; the time difference between two video signals of the same frame image is greater than or equal to the reciprocal of the frame rate of the video signal.

9. The method of claim 8, wherein, The sending multiple video signals corresponding to the same frame image to a tiled display device at different times includes: Sending the video signal of a target frame to a first display device at a first time; Sending the video signal of the target frame to a second display device at a second time; A time difference between the first time and the second time is defined as a first delay duration, and the first delay duration satisfies: △T1=M1*X+Y1; wherein, △T1 is a first time delay, X is a reciprocal of a frame rate; Y1 is a first compensation time smaller than the reciprocal of the frame rate, M1 is an integer greater than or equal to 0; the M1 and Y1 are not 0 at the same time.

10. The method of claim 9, wherein, The method for determining the first time delay comprises: When the first display device comprises an LCD display device, the second display device comprises an LED display device, and a row scanning direction of the LCD display device is parallel to a splicing edge, simultaneously sending first image frames and second image frames alternately switched to the first display device and the second display device; Obtaining voltage waveforms respectively output by the first display device and the second display device in a process of switching display of the first image frames and the second image frames; Determining a size of M1 according to a difference between the voltage waveforms; According to the size of M1, sending two video signals corresponding to the target frame to the first display device and the second display device at different times, so that the first display device and the second display device simultaneously display an image picture corresponding to the target frame; In a dynamic scanning state of the image picture corresponding to the target frame, adjusting a compensation time until dynamic scanning lines of the first display device and the second display device are continuous as a horizontal line, to obtain a size of Y1; According to the size of M1 and the size of Y1, determining the first time delay △T1.

11. The method of claim 9, wherein, The method for determining the first time delay comprises: When the first display device comprises an LCD display device, the second display device comprises an LED display device, and a row scanning direction of the LCD display device is parallel to a splicing edge, simultaneously sending first image frames and second image frames alternately switched to the first display device and the second display device; Obtaining voltage waveforms respectively output by the first display device and the second display device in a process of switching display of the first image frames and the second image frames; Determining a size of M1 according to a difference between the voltage waveforms; According to the size of M1, sending two video signals corresponding to the target frame to the first display device and the second display device at different times, so that the first display device and the second display device simultaneously display an image picture corresponding to the target frame; By keeping a display picture of the second display device consistent with a first scanning row or a last scanning row of the first display device, determining a size of Y1; According to the size of M1 and the size of Y1, determining the first time delay △T1.

12. The method of claim 11, wherein, The sending of the multiple video signals corresponding to the same frame image to the splicing display device at different times further comprises: Sending the video signal of the target frame to a third display device at a third time; Wherein, a time difference between the first time and the third time is defined as a second time delay, and the second time delay satisfies: △T2=M2*X+Y2; wherein, △T2 is a second time delay, X is a reciprocal of a frame rate; Y2 is a first compensation time smaller than the reciprocal of the frame rate, M2 is an integer greater than or equal to 0; the M2 and Y2 are not 0 at the same time.

13. The method of claim 12, wherein, The second time delay length determination method comprises: When the third display device comprises the LCD display device, the row scanning direction of the LCD display device is perpendicular to the splicing edge, and the first display device and the third display device are simultaneously sent with the first image frame and the second image frame alternately switched; Obtaining the voltage waveform output by the first display device and the third display device respectively during the first image frame and the second image frame switching display process; According to the difference of the voltage waveform, the size of M2 is determined; According to the size of M2, the two video signals corresponding to the target frame are sent to the first display device and the third display device at different times, so that the first display device and the third display device simultaneously display the image picture corresponding to the target frame; By keeping the scanning last row of the first display device and the scanning first row of the next third display device consistent with the scanning picture, the size of Y2 is determined; According to the size of M2 and the size of Y2, the second time delay length △T2 is determined.

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