CN113223446A - Display module controller and display system - Google Patents
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- CN113223446A CN113223446A CN202010069884.1A CN202010069884A CN113223446A CN 113223446 A CN113223446 A CN 113223446A CN 202010069884 A CN202010069884 A CN 202010069884A CN 113223446 A CN113223446 A CN 113223446A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 31
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- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 description 11
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The embodiment of the invention provides a display module controller and a display system. The display module controller includes: a programmable logic device; at least one LED display module connector; the bidirectional transmission buffer assembly is electrically connected between the programmable logic device and the corresponding LED display module connector and can work in a first state and a second state in a switchable manner under the control of the programmable logic device, wherein the first state is used for transmitting a detection signal provided by the programmable logic device to the display module through the corresponding LED display module connector so that the display module can detect according to the detection signal, and the second state is used for transmitting a feedback display module state signal to the programmable logic device through the corresponding LED display module connector. The invention arranges the bidirectional transmission buffer component on the display module controller, thereby realizing fault detection without a monitoring card, simplifying the connection and having lower cost.
Description
Technical Field
The invention relates to the technical field of display control, in particular to a display module controller and a display system.
Background
The LED (Light Emitting Diode) display screen is widely applied to industries such as urban media and urban traffic, when the LED display screen is used, each LED on the LED display screen is likely to have a fault, when the number and the position of the LED faults reach a certain degree, the display of information is influenced, and error information is transmitted in serious cases. In the prior art, the LED fault detection of the LED display screen system is realized by forming a loop by the receiving card, the LED lamp panel and the monitoring card, the cost of the monitoring card is high, and the connection of the LED display screen system is complex.
Disclosure of Invention
Therefore, to overcome the defects and shortcomings of the prior art, embodiments of the present invention provide a display module controller and a display system, which can implement LED failure detection with simple wiring and low cost.
In one aspect, an embodiment of the present invention provides a display module controller, including: a programmable logic device; at least one LED display module connector; each bidirectional transmission buffer component is electrically connected between the programmable logic device and the corresponding LED display module connector and can work in a first state and a second state in a switchable manner under the control of the programmable logic device, wherein the first state is used for transmitting a detection signal provided by the programmable logic device to a display module through the corresponding LED display module connector so that the display module can detect according to the detection signal, and the second state is used for transmitting a feedback display module state signal to the programmable logic device through the corresponding LED display module connector.
The display module can be matched with the bidirectional transmission buffer assembly to use by arranging the bidirectional transmission buffer assembly on the display module controller, so that the display module controller and the display module form a loop, LED fault detection of an LED display screen system can be realized without using a monitoring card, the connection can be simplified, and the cost is low.
In one embodiment of the invention, the programmable logic device controls the bidirectional transmission buffer component to work in a first state when receiving an externally transmitted working state control instruction.
In an embodiment of the present invention, the programmable logic device has a display control signal output pin, a data input output pin, and a state control pin, the bidirectional transmission buffer assembly is electrically connected to the display control signal output pin, the data input output pin, and the state control pin, the display control signal output pin and the data input output pin are used for outputting the detection signal, the data input output pin is further used for receiving the display module state signal, and the state control pin is used for outputting a state control signal that controls the bidirectional transmission buffer assembly to work in the first state and the second state in a switchable manner.
In an embodiment of the invention, the bidirectional transmission buffer component includes a first bidirectional buffer and a second bidirectional buffer, the first bidirectional buffer is electrically connected to the display control signal output pin, the data input output pin and the status control pin and is used for transmitting the detection signal to the corresponding LED display module connector, and the second bidirectional buffer is electrically connected to the data input output pin and the status control pin and is used for transmitting the display module status signal to the programmable logic device.
In one embodiment of the present invention, the display module controller further includes: the display module comprises an adapter plate and a display control card which is inserted into the adapter plate, the programmable logic device is arranged on the display control card, and the at least one display module connector and the at least one bidirectional transmission buffer component are arranged on the adapter plate.
In an embodiment of the present invention, the display control card is further provided with a plurality of ethernet interfaces, a plurality of ethernet PHY chips, a network transformer, and a microcontroller, the plurality of ethernet interfaces are respectively electrically connected to the plurality of ethernet PHY chips through the network transformer, the plurality of ethernet PHY chips are electrically connected to the programmable logic device, and the microcontroller is electrically connected to the programmable logic device.
In an embodiment of the invention, the LED display module connector includes a control signal pin, an RGB data group pin, and a data return pin, the control signal pin and the RGB data group pin are electrically connected to the first bidirectional buffer, the data return pin is electrically connected to the second bidirectional buffer, and the display module connector is a flat cable interface.
In another aspect, an embodiment of the present invention provides a display system, including: a display module controller as described above; and the first display module group comprises one or a plurality of cascaded first LED display modules and is electrically connected with a corresponding first target LED display module connector in the at least one LED display module connector.
The display system of this embodiment connects the display module group through the display module controller that is provided with bidirectional transmission buffering subassembly for display module controller and display module group form the return circuit, thereby need not to use the monitor card can realize the LED fault detection to LED display screen system, so can simplify the line, and have lower cost.
In an embodiment of the invention, the first display module group includes a plurality of first LED display modules which are cascaded and include a first-stage first LED display module and a last-stage first LED display module, the first-stage first LED display module is electrically connected to the first target LED display module connector to receive an image display signal, and the last-stage first LED display module is electrically connected to the first target LED display module connector to provide the display module status signal to the first target LED display module connector.
In one embodiment of the present invention, the display system further comprises: and the second display module group comprises one or a plurality of cascaded second LED display modules and is electrically connected with a corresponding second target LED display module connector in the at least one LED display module connector.
As can be seen from the above, the above technical features of the present invention may have one or more of the following advantages: the display module can be matched with the bidirectional transmission buffer assembly to use by arranging the bidirectional transmission buffer assembly on the display module controller, so that the display module controller and the display module form a loop, LED fault detection of an LED display screen system can be realized without using a monitoring card, the connection can be simplified, and the cost is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the module controller shown in fig. 1.
Fig. 3 is a schematic structural diagram of another embodiment of the module controller shown in fig. 1.
Fig. 4 is a schematic structural diagram of another embodiment of the module controller shown in fig. 1.
FIG. 5 is a schematic structural diagram of an embodiment of the display control card shown in FIG. 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a display system 10 according to an embodiment of the present invention. As shown in fig. 1, the display system 10 includes a display module controller 20 and a first display module group 30 and a second display module group 40 respectively connected to the display module controller 20, and the display module controller 20 includes a first target LED display module connector 221 and a second target LED display module connector 222. Specifically, the first display module group 30 is electrically connected to the first target LED display module connector 221, and the second display module group 40 is electrically connected to the second target LED display module connector 222. Taking the first display module group 30 as an example, the first display module group 30 may include a first LED display module 31a and a first LED display module 31b which are cascaded.
Each first LED display module is provided with, for example, an LED driving circuit supporting a point inspection function and a plurality of LED display pixels electrically connected to the LED driving circuit, and the LED driving circuit is configured to generate a display module status signal in a point inspection mode. For example, when the display module controller 20 controls the first display module group 30 to perform LED spot inspection, the LED driving circuit operates in a failure detection mode (or spot inspection mode), receives data for spot inspection provided by the display module controller 20 to drive and control the LED display pixels carried by the LED driving circuit, and outputs a display module status signal representing a failure detection result of each LED display pixel. In this embodiment, the LED driving circuit may be, for example, an LED driving chip including one or more supporting point tests.
Specifically, the first LED display module 31a, i.e., the first-stage first LED display module, is electrically connected to the first target LED display module connector 221 to receive the image display signal, and the first LED display module 31b, i.e., the last-stage first LED display module, is electrically connected to the first target LED display module connector 221 to provide the display module status signal to the first target LED display module connector 221.
It should be noted that the first LED display modules 31a and 31b may have the same circuit structure, and the difference of the reference numerals is mainly used to indicate that the first LED display modules are located at different positions in the first display module group 30; in addition, the number of the first LED display modules 31a and 31b is not limited to two as shown in fig. 1, and may be one or more than two. In addition, the second display module group 40 and the first display module group 30 may be similar display module groups, for example, and are not described herein. Of course, the number of the display module groups in the embodiment is not limited to two as shown in fig. 1, and may be one or more than two.
Referring to fig. 1 and fig. 2 together, fig. 2 is a schematic structural diagram of the display module controller 20 shown in fig. 1. As shown in fig. 2, the display module controller 20 may, for example, include a programmable logic device 110, at least one bi-directional transmission buffer component 210, and at least one LED display module connector 220 (only one bi-directional transmission buffer component 210 and one LED display module connector 220 are shown in fig. 2, and here the LED display module connector 220 is any one of a first target LED display module connector 221 and a second target LED display module connector 222 in fig. 1), wherein each bi-directional transmission buffer component 210 is electrically connected between the programmable logic device 110 and the corresponding LED display module connector 220.
Specifically, the Programmable logic device 110 may be, for example, an FPGA (Field Programmable Gate Array), the Programmable logic device 110 has a display control signal output pin, a data input/output pin, and a status control pin, the bidirectional transmission buffer component 210 is electrically connected to the display control signal output pin, the data input/output pin, and the status control pin of the Programmable logic device 110, the display control signal output pin and the data input/output pin are used for providing the image display signal (for example, an enable signal, a data latch signal, a shift clock, and a display data signal such as R, G, B) when an upper computer connected to the display module controller 20 sends an image display instruction, providing a detection signal (for example, a detection control signal and verification data) when the upper computer sends a display module detection instruction, the data input/output pin is further used for receiving the display module status signal, the state control pin is used for controlling the bidirectional transmission buffer assembly to work in a first state and a second state in a switchable manner when receiving a working state control instruction transmitted by an external device such as an upper computer, wherein the first state is used for transmitting a detection signal provided by the programmable logic device 110 to a display module through the corresponding LED display module connector 220 so that the display module can detect according to the detection signal, the second state is used for transmitting a display module state signal input by the display module through the corresponding LED display module connector 220 to the programmable logic device 110, and the first state can also be used for transmitting an image display signal provided by the programmable logic device 110 to the display module through the LED display module connector 220 so that the display module can display.
In view of the above, as shown in fig. 3, the bidirectional transmission buffer assembly 210 may, for example, include a first bidirectional buffer 211 and a second bidirectional buffer 212, the first bidirectional buffer 211 is electrically connected to the display control pin, the data input/output pin, and the state control pin of the programmable logic device 110, and the second bidirectional buffer 212 is electrically connected to the data input/output pin and the state control pin of the programmable logic device 110. The bidirectional transmission buffer component 210 can be switched to operate in a first state and a second state under the control of the programmable logic device 110, for example, the first bidirectional buffer 211 can operate in an output state under the control of the programmable logic device 110 by electrically connecting a display control pin, a data input/output pin, and a state control pin of the programmable logic device 110, that is, the image display signal provided by the programmable logic device 110 can be output to the corresponding LED display module connector 220 for output, and the detection signal provided by the programmable logic device 110 can be output to the corresponding LED display module connector 220 for output; the second bidirectional buffer 212 can work in an input state under the control of the programmable logic device 110 by electrically connecting the data input/output pin and the state control pin of the programmable logic device 110, that is, the display module state signal input from the first LED display module group 30 to the LED display module connector 220 can be transmitted to the programmable logic device 110.
In light of the above, the LED display module connector 220 is used to provide an interface for connecting the LED display module group to the module controller 20, and may be, for example, a flat cable interface, and the LED display module group may be connected to the LED display module connector 220 through a flat cable. The LED display module connector 220 may, for example, include a control signal pin, an RGB data set pin, and a data return pin. Taking the first target LED display module connector 221 as an example, the first target LED display module connector 221 may be electrically connected to the first bidirectional buffer 211 through, for example, a control signal pin and an RGB data pin, so as to transmit the image display signal provided by the programmable logic device 110 to the first LED display module group 30 electrically connected thereto; the first target LED display module connector 221 can be electrically connected to the second bidirectional buffer 212, for example, through a data return pin, so as to transmit a display module status signal of the fault detection result generated by the first LED display module group 30 connected thereto to the programmable logic device 110.
Referring to fig. 4, the module controller 20 may be a dual circuit board structure, for example, specifically, the module controller 20 may further include a display control card 100 and an interposer 200, for example, the programmable logic device 110 may be disposed on the display control card 100, for example, the bidirectional transmission buffer assembly 210 and the LED display module connector 220 may be disposed on the interposer 200, for example, and the display control card 100 may be plugged onto the interposer 200 by pin/socket mating, for example. Of course, the module controller 20 may also be a single circuit board structure with two-in-one display control card 100 and adapter board 200, and the programmable logic device 110, the bidirectional transmission buffer assembly 210 and the LED display module connector 220 are disposed on the same circuit board, which is not limited in the embodiments of the present invention.
As mentioned above, referring to fig. 5, the display control card 100 may further include, for example, a microcontroller 120, a plurality of ethernet interfaces 130, a network transformer 140, and a plurality of ethernet PHY chips 150, where the plurality of ethernet interfaces 130 are electrically connected to the plurality of ethernet PHY chips 150 through the network transformer 140, the plurality of ethernet PHY chips 150 are electrically connected to the programmable logic device 110, and the microprocessor 120 is electrically connected to the programmable logic device 110. Specifically, the Microcontroller 120 may be, for example, an MCU (Microcontroller Unit); the ethernet interface 130 may be, for example, an RJ45 port; the network transformer 140 may include, for example, one or more network transformer chips, one network transformer chip may be electrically connected between one ethernet interface 130 and one ethernet PHY chip 150, or one network transformer chip may be electrically connected between a plurality of ethernet interfaces 130 and a plurality of ethernet PHY chips 150. Of course, the embodiments of the invention are not limited thereto.
In order to more clearly understand the display system 10 according to the embodiment of the invention, an operation process of the display system 10 will be described below by taking the display module controller 20 connected to the first display module group 30 as an example.
Specifically, when the display module controller 20 performs LED spot inspection on the first display module group 30, the programmable logic device 110 of the display module controller 20 controls the bidirectional transmission buffer assembly 210 to operate in the output state through the state control pin, so as to output the spot inspection control signal and the verification data for the spot inspection to the first display module group 30 through the first target LED display module connector 221 through the display control signal output pin and the data input/output pin, respectively. The LED driving circuits of the first LED display modules 31a and 31b in the first display module group 30 control the LED display pixels carried by the LED display modules to perform point inspection, and input a display module status signal representing a fault detection result of each LED display pixel to the first target LED display module connector 221 through the last first LED display module 31 b. The programmable logic device 110 of the module controller 20 controls the bidirectional transmission buffer component 210 to operate in an input state through the status control pin, and inputs the display module status signal representing the fault detection result of each LED display pixel to the programmable logic device 110, so as to analyze whether the first LED display group 31a, 31b in the first display module group 30 has an LED dead pixel and locate the position of the dead pixel.
It should be noted that the display system 10 of the embodiment of the invention is not limited to the point inspection that can support the foregoing embodiment, and can also support the flat cable inspection, and of course, the display system 10 of the embodiment of the invention can also support the display control of a general display module.
In summary, the embodiment of the invention can be used in combination with a display module by arranging the bidirectional transmission buffer component on the display module controller, so that the display module controller and the display module form a loop, and the LED fault detection of the LED display screen system can be realized without using a monitor card, thereby simplifying system connection and having lower cost.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structural contradictions, which do not violate the purpose of the present invention.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, each functional unit/module in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units/modules.
The integrated units/modules, which are implemented in the form of software functional units/modules, may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing one or more processors of a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A display module controller, comprising:
a programmable logic device;
at least one LED display module connector;
each bidirectional transmission buffer component is electrically connected between the programmable logic device and the corresponding LED display module connector and can work in a first state and a second state in a switchable manner under the control of the programmable logic device, wherein the first state is used for transmitting a detection signal provided by the programmable logic device to a display module through the corresponding LED display module connector so that the display module can detect according to the detection signal, and the second state is used for transmitting a feedback display module state signal to the programmable logic device through the corresponding LED display module connector.
2. The display module controller of claim 1, wherein the programmable logic device controls the bi-directional transmission buffer assembly to operate in the first state upon receiving an externally transmitted operating state control command.
3. The display module controller of claim 1, wherein the programmable logic device has a display control signal output pin, a data input output pin, and a status control pin, the bidirectional transmission buffer component is electrically connected to the display control signal output pin, the data input output pin, and the status control pin, the display control signal output pin and the data input output pin are used for outputting the detection signal, the data input output pin is further used for receiving the display module status signal, and the status control pin is used for outputting a status control signal for controlling the bidirectional transmission buffer component to be switchable between the first status and the second status.
4. The display module controller of claim 3, wherein the bi-directional transmission buffer component comprises a first bi-directional buffer and a second bi-directional buffer, the first bi-directional buffer electrically connecting the display control signal output pin, the data input output pin and the status control pin and configured to transmit the detection signal to the corresponding LED display module connector, the second bi-directional buffer electrically connecting the data input output pin and the status control pin and configured to transmit the display module status signal to the programmable logic device.
5. The display module controller of any one of claims 1 to 4, comprising: the display module comprises an adapter plate and a display control card which is inserted into the adapter plate, the programmable logic device is arranged on the display control card, and the at least one display module connector and the at least one bidirectional transmission buffer component are arranged on the adapter plate.
6. The display module controller of claim 5, wherein a plurality of Ethernet interfaces, a plurality of Ethernet PHY chips, a network transformer and a microcontroller are further disposed on the display control card, the plurality of Ethernet interfaces are electrically connected to the plurality of Ethernet PHY chips through the network transformer, respectively, the plurality of Ethernet PHY chips are electrically connected to the programmable logic device, and the microcontroller is electrically connected to the programmable logic device.
7. The display module controller of claim 4, wherein the LED display module connector comprises a control signal pin, an RGB data set pin, and a data return pin, the control signal pin and the RGB data set pin are electrically connected to the first bi-directional buffer, the data return pin is electrically connected to the second bi-directional buffer, and the display module connector is a flex cable interface.
8. A display system, comprising:
the display module controller of any one of claims 1 to 7; and
the first display module group comprises one or a plurality of cascaded first LED display modules and is electrically connected with a corresponding first target LED display module connector in the at least one LED display module connector.
9. The display system of claim 8, wherein the first group of display modules comprises a cascaded plurality of first LED display modules and the plurality of first LED display modules comprises a first level first LED display module and a last level first LED display module, the first level first LED display module electrically connected to the first target LED display module connector to receive image display signals, the last level first LED display module electrically connected to the first target LED display module connector to provide the display module status signals to the first target LED display module connector.
10. The display system of claim 8, further comprising:
and the second display module group comprises one or a plurality of cascaded second LED display modules and is electrically connected with a corresponding second target LED display module connector in the at least one LED display module connector.
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| CN114049863A (en) * | 2021-12-13 | 2022-02-15 | 深圳市中渤光电有限公司 | LED driving chip information management method based on half-duplex transmission |
| CN116416929A (en) * | 2023-06-09 | 2023-07-11 | 中科(深圳)无线半导体有限公司 | LED display system data feedback control method |
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Application publication date: 20210806 |