WO2024045760A1

WO2024045760A1 - Display system and display control method therefor

Info

Publication number: WO2024045760A1
Application number: PCT/CN2023/099435
Authority: WO
Inventors: 李家栋; 黄建东; 张青松
Original assignee: 深圳市绿源半导体技术有限公司
Priority date: 2022-08-29
Filing date: 2023-06-09
Publication date: 2024-03-07
Also published as: CN115116385A; CN115116385B

Abstract

A display system (100) and a display control method. The display system (100) comprises several display apparatuses (10) that are cascaded together. A display apparatus (10) comprises: a data processing module (15), a frame structure identification module (17), at least two bidirectional ports (A, B) located on an upstream side, and at least two bidirectional ports (C, D) located on a downstream side. The at least two bidirectional ports (A, B) on the upstream side are both in communication connection with the frame structure identification module (17); and the frame structure identification module (17) is used for identifying whether a signal input of one bidirectional port (A, B) on the upstream side is abnormal, and switching the other bidirectional port (A, B) on the upstream side into a signal input port when the signal input is abnormal. The at least two bidirectional ports (C, D) on the downstream side are both in communication connection with the frame structure identification module (17). The reliability of the entire display system (100) can be improved.

Description

Display system and display control method

Technical field

The invention relates to the field of display control, especially the field of LED display control, and more specifically, to a display control system and a display control method thereof.

Background technique

The LED display system includes several cascaded display units, and the signal transmission between these display units is in series. In applications using LED display systems, a variety of failures may occur. For example, if the signal line is damaged, the reliability of the entire system will be reduced. In addition, an open circuit in the power line of a certain display unit, an open circuit in the ground line, or internal damage to the device will reduce the reliability of the entire system. After a display unit suffers from signal line damage, power line open circuit, ground line open circuit and other faults, its subsequent display units will be in a state of confusion, resulting in a greatly reduced reliability of the entire LED display system. Therefore, a solution is urgently needed to improve the reliability of the display system.

The purpose of the invention is to provide reliability of the display system.

Technical solutions

In a first aspect, the present invention provides a display device, including: a data processing module, a frame structure identification module, at least two bidirectional ports located on the upstream side, and at least two bidirectional ports located on the downstream side; wherein: the upstream side At least two bidirectional ports are communicatively connected to the frame structure identification module. The frame structure identification module is used to identify whether the signal input of one of the bidirectional ports on the upstream side is abnormal, and when its signal input is abnormal, The other bidirectional port on the upstream side is switched to a signal input port; at least two bidirectional ports on the downstream side are communicably connected to the frame structure identification module; when at least one bidirectional port on the upstream side is not abnormal , the frame structure identification module switches the display device to the first working mode. When the display device is in the first working mode, at least two bidirectional ports on the downstream side serve as output ports and output to the outside at the same time; The data processing module is communicatively connected to the frame structure identification module, and is used to process and output signals generated by the frame structure identification module.

As a preferred solution, when the frame structure identification module recognizes that all bidirectional port signal inputs on the upstream side are abnormal, it switches the display device to the second working mode. When the display device is in the second working mode, the display device switches to the second working mode. One of the bidirectional ports on the downstream side is used as an input port, and the other bidirectional ports on the downstream side are used as backup input ports.

As a preferred solution, when the frame structure identification module recognizes that the signal input of all bidirectional ports on the upstream side is abnormal and the signal input of only one bidirectional port among all the bidirectional ports on the downstream side is not abnormal, the display device Switch to the third working mode. When the display device is in the third working mode, the non-abnormal bidirectional port on the downstream side serves as an input port.

As a preferred solution, when the frame structure identification module recognizes that all bidirectional ports on the upstream side and all bidirectional ports on the downstream side are abnormal, the display device switches to the fourth working mode, and the display device is in the fourth working mode. In the working mode, the external output of the data processing module is stopped.

In a second aspect of the invention, a display system is provided, including a plurality of display devices cascaded together. The display device is the display device provided in the first aspect of the invention; among the plurality of cascaded display devices, Except for the first and last two display devices, the bidirectional ports on the upstream side of the other display devices are respectively connected to the corresponding bidirectional ports on the downstream side of the previous display device.

As a preferred solution, it also includes a first controller and a second controller; among the several display devices in the cascade, the bidirectional port on the upstream side of the first display device is connected to the output end of the first controller, The bidirectional port on the downstream side of the tail display device is connected to the output of the second controller.

As a preferred solution, it also includes a ground wire and a power wire, and the plurality of display devices are connected to the ground wire and power wire in a parallel manner to receive power supply.

In a third aspect, the present invention provides a display control method, including the following steps: Step S11: Use the first bidirectional port on the upstream side of the display device as an input port; Step S13: Identify whether the signal input of the first bidirectional port is Abnormality. If no abnormality is recognized, the process proceeds to step S61. If an abnormality is recognized, the process proceeds to step S21. Step S21: Use the second bidirectional port on the upstream side of the display device as an input port. Step S23: Identify the second bidirectional port. Whether the signal input of the two bidirectional ports is abnormal. If no abnormality is recognized, the process proceeds to step S61; Step S61: The display device enters the first working mode, using at least two bidirectional ports on the downstream side of the display device as output ports and simultaneously External output.

As a preferred solution, in step S23, if the signal inputs of all bidirectional ports on the upstream side of the display device are abnormal, the process proceeds to the following steps: Step S31: Connect the third port on the downstream side of the display device. The bidirectional port serves as the input port; Step S33: Identify whether the signal input of the third bidirectional port is abnormal. If no abnormality is identified, the process proceeds to step S62; Step S62: The display device enters the second working mode, and the Three bidirectional ports serve as input ports, and the fourth bidirectional port on the downstream side serves as a backup input port.

As a preferred solution, in step S33, if it is recognized that the signal input of the third bidirectional port is abnormal, the process enters the following steps: step S41: use the fourth bidirectional port as an input port; step S43: identify Whether the signal input of the fourth bidirectional port is abnormal, if no abnormality is recognized, the process proceeds to step S63; step S63: the display device enters the third working mode and uses the fourth bidirectional port as an input port.

As a preferred solution, in step S43, if it is recognized that the signal input of all bidirectional ports on the downstream side of the display device is abnormal, the process proceeds to the following step S64: the display device enters the fourth working mode and stops external communication. output.

As a preferred solution, it also includes step S2: cascade several of the display devices into a display system. The bidirectional port on the upstream side of the head display device is connected to the output end of the first controller, and the downstream side of the tail display device is connected. The bidirectional port of the second controller is connected to the output end of the second controller, and the bidirectional ports of the upstream side of the other display devices are connected to the corresponding bidirectional ports of the downstream side of the previous display device; in step S23, the upstream side of one of the display devices When the signal inputs of all bidirectional ports are abnormal, other display devices on the downstream side of the display device begin to receive signals from the second controller through the bidirectional ports on the downstream side.

beneficial effects

Implementing the invention can reduce the impact of the display device on the entire display system when a part of the bidirectional ports is abnormal, and improve the reliability of the entire display system.

Description of drawings

Figure 1 is a schematic diagram of a display system provided by an embodiment of the present invention;

Figure 2 is a schematic diagram of a display device used in the display system shown in Figure 1;

Figure 3 is a schematic flowchart of a display control method of the display device shown in Figure 2;

FIGS. 4 to 7 are schematic diagrams of different working modes of the display system shown in FIG. 1 .

Embodiments of the invention

The present invention will be further described below in conjunction with the accompanying drawings and examples.

Please refer to FIG. 1 . In one embodiment of the present invention, a display system 100 is provided that includes a plurality of display devices 10 cascaded together. For convenience of explanation, the display devices 10 are respectively referred to as a display device 10a and a display device 10b. , display device 10c,..., display device 10n. In this embodiment, the display device 10 is an LED display module.

Please refer to Figure 2. Each display device 10 has a data processing module 15, a frame structure identification module 17, a first bidirectional port A and a second bidirectional port B located on the upstream side, a third bidirectional port C located on the downstream side, and a fourth bidirectional port C. Port D. In this specification and claims, the upstream side of the display device 10 refers to the side that is communicatively connected to the previous display device, and the downstream side of the display device 10 refers to the side that is communicatively connected to the subsequent display device. Understandably, the upstream side and the downstream side are successively defined based on signal cascades, not simply based on physical orientation. In this embodiment, the display device 10 has two bidirectional ports (the first bidirectional port A and the second bidirectional port B) on the upstream side and two bidirectional ports (the third bidirectional port C and the fourth bidirectional port D) on the downstream side. , however, the invention is not limited to this specific form, that is, the upstream side of the display device 10 may have more bidirectional ports, and the downstream side may also have more bidirectional ports.

The first bidirectional port A and the second bidirectional port B on the upstream side, the third bidirectional port C and the fourth bidirectional port D on the downstream side are all communicably connected to the frame structure identification module 17 . The data processing module 15 is communicatively connected to the frame structure identification module 17, and is used to process and output signals generated by the frame structure identification module 17. The invention does not involve the improvement of the data processing module 15, so the data processing module 15 will not be described in detail.

Please refer to FIGS. 1 and 2 . In the display system 100 , in addition to the first and last two display devices 10 a and 10 n among several cascaded display devices 10 , the first bidirectional port A and the second bidirectional port on the upstream side of other display devices are B is respectively connected to the third bidirectional port C and the fourth bidirectional port D on the downstream side of the previous display device. For example, the first bidirectional port A on the upstream side of the display device 10b is connected to the third bidirectional port C on the downstream side of the display device 10a, and the second bidirectional port B on the upstream side of the display device 10b is connected to the third bidirectional port C on the downstream side of the display device 10a. Four bidirectional port D connections.

The first bidirectional port A and the second bidirectional port B on the upstream side of the display device 10a at the head are connected to the output end of the first controller 21, and the third bidirectional port C and the fourth bidirectional port on the downstream side of the display device 10n at the tail are connected. D is connected to the output of the second controller 22 . It can be understood that the display system 100 also includes a ground wire and a power wire, and the plurality of display devices 10a to 10n are connected to the ground wire and power wire in a parallel manner to receive power supply.

The frame structure identification module 17 of each display device 10 is used to identify whether the signal input of each bidirectional port is abnormal, and perform corresponding processing when an abnormality is identified. For example, when it is recognized that the signal input of the first bidirectional port A on the upstream side is abnormal, the second bidirectional port B on the upstream side is switched to a signal input port, thereby improving the reliability of the entire display system 100 .

Even when the signal inputs of all bidirectional ports on the upstream side of a certain display device 10, such as the first bidirectional port A and the second bidirectional port B, are abnormal, the display device 10 and the display control method thereof created by the present invention can also be implemented. The reliability of the entire display system 100 is improved. 2 and 3 , the display device 10 is provided with a first bidirectional port A and a second bidirectional port B on the upstream side and a third bidirectional port C and a fourth bidirectional port D on the downstream side for example.

Please refer to Figures 2 and 3. In this embodiment, the display control method includes performing the following steps on the display device:

Step S11: Use the first bidirectional port A on the upstream side of the display device 10 as an input port; then, the process proceeds to step S13;

Step S13: Identify whether the signal input of the first bidirectional port A is abnormal. If no abnormality is identified, the process proceeds to step S61: the display device 10 enters the first working mode. In the first working mode, the third port on the downstream side of the display device 10 The three bidirectional ports C and the fourth bidirectional port D serve as output ports and output to the outside at the same time.

Correspondingly, if the signal input of the first bidirectional port A is abnormal in step S13, the process proceeds to step S21: the second bidirectional port B on the upstream side of the display device 10 is used as the input port; then the process proceeds to step S23;

Step S23: Identify whether the signal input of the second bidirectional port B is abnormal. If no abnormality is identified, the process proceeds to step S61.

Therefore, when implementing the present invention, as long as one of the bidirectional ports on the upstream side of the display device 10, such as the first bidirectional port A or the second bidirectional port B, operates normally, the display device 10 can operate in the first operating mode, so that the entire display The system 100 can work normally, which improves the reliability of the display system 100.

As shown in Figure 4, an abnormality occurs in the second bidirectional port B on the upstream side of the display device 10b, the first bidirectional port A on the upstream side of the display device 10c, and the first bidirectional port A on the upstream side of the display device 10d, but this situation still exists. The normal operation of the entire display system 100 is not affected.

Please refer to Figures 2 and 3 again. Further, if it is recognized in step S23 that the signal input of the second bidirectional port B is abnormal, that is, the signal input of the bidirectional ports on the upstream side of the display device 10 is abnormal, then the process proceeds to step S31: Use the third bidirectional port C on the downstream side of the display device 10 as the input port; then the process proceeds to step S33;

Step S33: Identify whether the signal input of the third bidirectional port C is abnormal. If no abnormality is identified, the process proceeds to step S62: the display device 10 enters the second working mode. In the second working mode, the downstream side of the display device 10 is The third bidirectional port C serves as an input port, and the fourth bidirectional port D serves as a backup input port.

As shown in FIG. 5 , both the first bidirectional port A and the second bidirectional port B on the upstream side of the display device 10c are abnormal. That is, both the bidirectional ports on the upstream side of the display device 10c are abnormal. At this time, the display before the display device 10c The devices 10a~10b receive the signal from the first controller 21, so that they can work normally. For example, when working in the first working mode, the display device 10c and the subsequent display devices 10d~10n receive the signal from the second controller 22, so that they can also operate normally. It can work normally. Specifically, among the display devices 10d to 10n, each display device uses a bidirectional port on the downstream side, such as the third bidirectional port C or the fourth bidirectional port D, as an input port, and other bidirectional ports on the downstream side as backup. The input port, at the same time, uses the first bidirectional port A and the second bidirectional port B on the upstream side as output ports and outputs to the outside at the same time.

Therefore, by implementing the invention of the present invention, even if the bidirectional ports on the upstream side of a certain display device 10c are abnormal, the entire display system 100 can still operate normally, thereby improving the reliability of the display system 100.

Please refer to Figures 2 and 3 again. Further, if it is recognized that the signal input of the third bidirectional port C is abnormal in step S33, the process proceeds to step S41: the fourth bidirectional port D of the display device is used as the input port, and then the process proceeds Step S43;

Step S43: Identify whether the signal input of the fourth bidirectional port D is abnormal. If no abnormality is identified, the process proceeds to step S63: the display device 10 enters the third working mode. In the third working mode, the fourth bidirectional port D is used as input port.

As shown in FIG. 6 , abnormality occurs in the first bidirectional port A, the second bidirectional port B, and the third bidirectional port C of the display device 10c. At this time, the display devices 10a~10b before the display device 10c receive the first controller 21 The display device 10c and the subsequent display devices 10d~10n receive the signal from the second controller 22, so that they can work normally, for example, in the first working mode; the display device 10c and the subsequent display devices 10d~10n receive the signal from the second controller 22, so that they can also work normally. Therefore, when implementing the invention, When all the bidirectional ports on the upstream side of a certain display device 10c and most of the bidirectional ports on the downstream side are abnormal, as long as one bidirectional port on the downstream side is not abnormal, the entire display system 100 can still work normally, which improves the performance of the display system 100 reliability.

Please refer to Figures 2 and 3 again. Further, if it is recognized in step S43 that the signal input of the fourth bidirectional port D is abnormal, at this time, it is equivalent to all the bidirectional ports on the upstream side and all the bidirectional ports on the downstream side of the display device. If abnormal, the process proceeds to step S64: the display device 10 enters the fourth working mode, stops external output, and turns off the PWM display.

As shown in FIG. 7 , all bidirectional ports on the upstream side of the display device 10c (for example, the first bidirectional port A, the second bidirectional port B), and all the bidirectional ports on the downstream side (for example, the third bidirectional port C, the fourth bidirectional port D) Exceptions occurred. At this time, the display devices 10a~10b before the display device 10c receive the signal from the first controller 21 and can operate normally. The display devices 10d~10n after the display device 10c receive the signal from the second controller 22 and can also operate normally. Work. Although the display device 10c fails as a whole, it does not affect the normal operation of the other display devices 10a ~ 10b and 10d ~ 10n; and after the display device 10c turns off the PWM display, it is difficult for the user to detect its failure, thereby reducing the impact on the overall display system. The impact of 100 improves the reliability of the display system 100 .

There are many ways to identify whether the signal input of a certain bidirectional port of the display device is abnormal. In this embodiment, as shown in Figures 1 and 2, the frame structure identification module 17 is used to identify whether the signal input of a certain bidirectional port is abnormal.

In this embodiment, the frame structure identification module 17 identifies the received data, determines whether the frame structure is correct or incorrect based on different signal timing designs, and then controls the corresponding port to receive data and control the corresponding port to output data. Wrong frame structure data includes data that maintains a fixed level within a certain period of time DT, or the recognition module believes that the input frame structure does not comply with the timing rules required by the design. Time DT can be preset according to different applications.

The specific frame structure is also designed according to design needs and is not limited to one type. For example, assuming that the transmitted data is RZ code, the frame header can be set to a specific value of 8-bit or 16-bit data to represent the correct frame structure, such as 8’hAA, 16’h5555, etc. If the received data does not contain the specific data of the set frame header, it will be judged that the frame structure is wrong, otherwise it will be judged that the frame structure is correct. Of course, the specific data set can also be placed at the end of the frame. This is an example but not limited to this.

In the solution shown in Figure 1, each display device, such as the display device 10a, has two bidirectional ports A and B on the upstream side and two bidirectional ports C and D on the downstream side; however, the invention is not limited to this specific arrangement. , that is, each display device may have more bidirectional ports on the upstream side and downstream side respectively; or it may have one bidirectional port on the upstream side and one bidirectional port on the downstream side. Referring to Figure 1, if each display device has a bidirectional port on the upstream side and a bidirectional port on the downstream side, it is equivalent to treating bidirectional ports A and B as one bidirectional port, and treating bidirectional ports C and D as one bidirectional port. .

The above embodiments only express preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, such as combining different features in each embodiment, etc., which are all It belongs to the protection scope of the present invention.

Claims

A display system includes a first controller, a second controller, and several display devices cascaded together, and is characterized by:

Each of the display devices includes: a data processing module, a frame structure identification module, a bidirectional port located on the upstream side, and a bidirectional port located on the downstream side; the bidirectional port on the upstream side and the bidirectional port on the downstream side are both connected to the The frame structure identification module can be connected by communication. The frame structure identification module is used to identify whether the signal input of the upstream side bidirectional port and the downstream side bidirectional port is abnormal; the data processing module and the frame structure identification module It can be communicatively connected and used to process the signal generated by the frame structure recognition module and output it externally;

Among the several display devices in the cascade, except for the first and last two display devices, the bidirectional ports on the upstream side of the other display devices are respectively connected to the corresponding bidirectional ports on the downstream side of the previous display device. The upstream side of the first display device The bidirectional port of the first controller is connected to the output terminal of the first controller, the bidirectional port of the downstream side of the display device at the tail is connected to the output terminal of the second controller, and the output terminal of the first controller is connected to the output terminal of the first controller. The bidirectional port on the upstream side of the display device provides a signal, and the output end of the second controller provides a signal to the bidirectional port on the downstream side of the tail display device;

Among the several display devices in the cascade, when the signal input of at least one bidirectional port of each display device on the upstream side is not abnormal, the frame structure identification module switches the display device to the first working mode. When the device is in the first working mode, it receives the signal from the first controller, and the bidirectional port on the downstream side serves as an output port and outputs to the outside at the same time;

Among the several display devices in the cascade, when the frame structure identification module of a certain display device recognizes that all bidirectional port signal inputs on its upstream side are abnormal, the display device switches from the first working mode to In the second working mode, the display device before the display device in the second working mode continues to receive the signal from the first controller; when the display device is in the second working mode, the bidirectional port on the downstream side As an input port; other display devices after the display device in the second working mode are switched to receive the signal of the second controller, and each display device uses its downstream bidirectional port as an input port, and the upstream side The bidirectional port is used as an output port and outputs externally.
The display system according to claim 1, wherein the number of bidirectional ports on the upstream side of each display device is at least two, and the number of bidirectional ports on the downstream side is at least two; Two bidirectional ports, and at least two bidirectional ports on the downstream side are communicatively connected to the frame structure identification module; when the display device is in the first working mode, it receives a signal from the first controller, and the downstream At least two bidirectional ports on the side are used as output ports and output to the outside at the same time.
The display system according to claim 2, wherein when the display device is in the second working mode, one of the bidirectional ports on the downstream side serves as an input port, and the other bidirectional ports on the downstream side serve as backup input ports.
The display system according to claim 2, wherein the frame structure identification module recognizes that the signal input of all bidirectional ports on the upstream side is abnormal, and the signal input of only one bidirectional port among all the bidirectional ports on the downstream side is abnormal. When there is an abnormality, the display device is switched to the third working mode. When the display device is in the third working mode, the non-abnormal bidirectional port on the downstream side is used as an input port.
The display system according to claim 2, wherein the frame structure recognition module switches the display device to the fourth working mode when it recognizes that all bidirectional ports on the upstream side and all bidirectional ports on the downstream side are abnormal. , when the display device is in the fourth working mode, the external output of the data processing module is stopped and the display is turned off.
The display system of claim 2, wherein in other display devices after the display device in the second working mode, one bidirectional port on the downstream side of each display device serves as an input port, and other bidirectional ports on the downstream side serve as input ports. The port serves as a backup input port, and the two bidirectional ports on the upstream side serve as output ports and output to the outside world at the same time.
The display system according to claim 2, wherein the frame structure recognition module switches the other bidirectional port on the upstream side to signal input when it recognizes that the signal input of one of the bidirectional ports on the upstream side is abnormal. port.
The display system according to claim 2, further comprising a ground wire and a power wire, and the plurality of display devices are connected to the ground wire and power wire in a parallel manner to receive power supply.
A display control method, characterized by including the following steps:

Step S2: Cascade several display devices into a display system. At least two bidirectional ports on the upstream side of the head display device are connected to the output end of the first controller, and at least two bidirectional ports on the downstream side of the tail display device are connected. To the output end of the second controller, the bidirectional ports on the upstream side of other display devices are connected to the corresponding bidirectional ports on the downstream side of the previous display device; the output end of the first controller is directed to the upstream side of the first display device. The bidirectional port on the side provides a signal, and the output end of the second controller provides a signal to the bidirectional port on the downstream side of the display device at the tail;

Step S11: Among the several display devices in the cascade, after using the first bidirectional port on the upstream side of each display device as an input port, the process proceeds to step S13;

Step S13: Identify whether the signal input of the first bidirectional port is abnormal. If no abnormality is identified, the process proceeds to step S61. If an abnormality is identified, the process proceeds to step S21;

Step S21: After using the second bidirectional port on the upstream side of the display device as the input port, the process proceeds to step S23;

Step S23: Identify whether the signal input of the second bidirectional port is abnormal. If no abnormality is identified, the process proceeds to step S61;

Step S61: The display device enters the first working mode to receive the signal from the first controller, and uses at least two bidirectional ports on the downstream side of the display device as output ports and outputs them to the outside at the same time;

In step S23, if the signal inputs of all bidirectional ports on the upstream side of a display device are abnormal, the process proceeds to step S31;

Step S31: After using the third bidirectional port on the downstream side of the display device as the input port, the process proceeds to step S33;

Step S33: Identify whether the signal input of the third bidirectional port of the display device is abnormal. If no abnormality is identified, the process proceeds to step S62;

Step S62: The display device enters the second working mode from the first working mode, using the third bidirectional port as an input port;

Other display devices before the display device in the second working mode continue to receive signals from the first controller; other display devices after the display device in the second working mode switch to receive the second controller. signal, each display device uses the bidirectional port on the downstream side as an input port, and the bidirectional port on the upstream side as an output port and outputs it to the outside.
The display control method according to claim 9, characterized in that, in step S33, if it is recognized that the signal input of the third bidirectional port is abnormal, the process proceeds to the following steps:

Step S41: Use the fourth bidirectional port as the input port;

Step S43: Identify whether the signal input of the fourth bidirectional port is abnormal. If no abnormality is identified, the process proceeds to step S63;

Step S63: The display device enters the third working mode and uses the fourth bidirectional port as an input port.
The display control method according to claim 10, characterized in that, in the step S43, if it is recognized that the signal input of all bidirectional ports on the downstream side of the display device is abnormal, the process proceeds to the following step S64: the display The device enters the fourth working mode, stops external output and turns off the display.