CN104464617B - Parallel display system and display devices thereof - Google Patents
Parallel display system and display devices thereof Download PDFInfo
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- CN104464617B CN104464617B CN201410603716.0A CN201410603716A CN104464617B CN 104464617 B CN104464617 B CN 104464617B CN 201410603716 A CN201410603716 A CN 201410603716A CN 104464617 B CN104464617 B CN 104464617B
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Abstract
The invention belongs to the technical field of display control, and provides a parallel display system and one or more display devices of the parallel display system. The display devices in parallel connection with a data bus are adopted in the parallel display system. The data bus is used for transmitting data or instructions. The first display device executing preselected operations is determined by carrying out signal detection on a first port or a second port of each display device. Then, starting from the first display device executing the preselected operations, the display devices execute the preselected operations in sequence. The first port of the first display device and the second port of the nth display device are not connected with external equipment, and therefore the problems of complex wiring and signal interference are avoided.
Description
Technical field
The invention belongs to LED display actuation techniques field, more particularly to a kind of display system in parallel and its display device.
Background technology
Display system in parallel is as shown in figure 1, the data input pin Sin of all display devices in display system in parallel is simultaneously
Connection is connected to the output end of controller, and each display device receives identical data flow.In order that each display device can be from
Data needed for it is obtained in identical data flow simultaneously carry out luminescence display, then need to be numbered each display device, i.e.,
It is address configuration.When display system in parallel carries out lighting effects display, each display device is according to its address information from data
Corresponding data are taken out in stream to realize corresponding light display effect.
At present, in the prior art, the display device in display system in parallel performs the side of the operations such as similar address configuration
Formula has following two：
(1) each display device individually carries out the operation such as address configuration；Which is implemented and is safeguarded in Practical Project
When need to consume substantial amounts of manpower and excessive time, inefficiency, and hinder the popularization of parallel display control system and make
With；
(2) by using special address date port, multiple display devices are gone here and there step by step by its address date port
Join and realize that automatic address is configured with the multiple display devices in display system in parallel, relative to above-mentioned mode (1), it is significantly
Improve installation and the maintenance efficiency of display system in parallel.
Display system in parallel in aforesaid way (2) is as shown in Fig. 2 the FPDP Sin of display device is with parallel way
The first control module 100 is connected, address date port is connected in series step by step, i.e., the address date output end of previous display device
Mouth Dout connects the latter address date input port Din of display device, when address configuration is carried out, the second control module
200 persistently send address date carries out address configuration operation to display device 1 and from display device 1 up to display device n step by step.
There are wiring complexity and two in engineer applied by this kind of mode in display effect data and the transmission of address date point two lines road
The problem that signal is interfered with each other between circuit.
Additionally, it is similar with aforesaid way (2), in entitled addressable display driver circuit in parallel and its system (Shen
Please number：201120169703.9) it is many in display control program it discloses a kind of display control program in patent document
Individual drive circuit chip is connected in parallel in data/address bus, data/address bus connection display data control device, multiple drive circuits
Can be sequentially connected in series between chip；Display data control device in display control program sends data to multiple drives
Dynamic circuit chip, each drive circuit chip includes receiving decoder module, display data processing module and address date treatment mould
The data for receiving are decoded by block by reception decoder module, isolate display data and address date, and are input into respectively aobvious
Show data processing module and address date processing module, display data processing module is according to display data output drive signal controlling
LED display device processed；Address date processing module is then received and storage address data, and by address date forwarding output to next
Individual drive circuit chip, so as to be that each drive circuit chip realizes that writing location operates successively according to the order being connected in series.This shows
Show that control system equally exists the complicated problem that signal is interfered with each other and between two lines road of wiring.
In sum, prior art is transmitted display effect data and is existed when carrying out address configuration respectively using two lines road
The complicated problem that signal is interfered and between two lines road of wiring.
The content of the invention
It is an object of the invention to provide a kind of display device of display system in parallel, it is intended to solve prior art and use two
Bar circuit transmits display effect data and carries out the complicated signal phase and between two lines road of wiring existing during address configuration respectively
The problem mutually disturbed.
The present invention is achieved in that a kind of display device of display system in parallel, and one or more display devices are in parallel
Data/address bus is connected to, each display device has first port and second port, the first port of each display device or
Two-port netwerk receives the signal that the data/address bus is transmitted when being connected with the data/address bus；Since the 1st display device,
The mode that second port according to the 1st display device connects the 2nd first port of display device is connected in series step by step
To n-th display device, n is positive integer；
The data/address bus is additionally operable to transmit data or instruction；
Each display device determines first to perform pre-selection by carrying out signal detection to its first port or second port
The display device of operation.
Another object of the present invention also resides in a kind of display system in parallel of offer, and it includes control device and one or many
Individual above-mentioned display device, the control device connects one or more above-mentioned display devices by data/address bus.
Display device by being connected in parallel in data/address bus using one or more in display system in parallel of the invention,
The data/address bus is used to transmit data or instruction, and each display device carries out signal inspection by its first port or second port
Survey to determine the first display device for performing pre- selection operation, then sequentially held successively from the first display device for performing pre- selection operation
The pre- selection operation of row is until last display device, and the first port of the 1st display device and n-th the second of display device
Port is not connected to external equipment, it is to avoid complicated and signal interference the problem of wiring, therefore solves prior art and use two
Signal is mutual between circuit transmits display effect data and carries out wiring complexity and two lines road existing during address configuration respectively
The problem of interference.
Brief description of the drawings
Fig. 1 is the structural representation of the display system a kind of in parallel that prior art is provided；
Fig. 2 is the structural representation of the another kind parallel connection display system that prior art is provided；
Fig. 3 is that the connection between display device and data/address bus in display system in parallel provided in an embodiment of the present invention is closed
It is schematic diagram；
Fig. 4 is another company between display device and data/address bus in display system in parallel provided in an embodiment of the present invention
Connect relation schematic diagram；
Fig. 5 is first between display device and data/address bus in the display system in parallel involved by the embodiment of the present invention
Example operating diagram；
Fig. 6 is second between display device and data/address bus in the display system in parallel involved by the embodiment of the present invention
Example operating diagram；
Fig. 7 is the 3 between display device and data/address bus in the display system in parallel involved by the embodiment of the present invention
Example operating diagram；
Fig. 8 is the 4 between display device and data/address bus in the display system in parallel involved by the embodiment of the present invention
Example operating diagram.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 3 shows the company between display device and data/address bus in display system in parallel provided in an embodiment of the present invention
Relation is connect, for convenience of description, the part related to the embodiment of the present invention is illustrate only, details are as follows：
One or more display devices are connected in parallel in data/address bus 100, and each display device (X1~Xn) has first
Port A and second port B, and each display device (X1~Xn) first port A or second port B with data/address bus 100
The signal that data/address bus 100 is transmitted, the first port A and second port B of each display device (X1~Xn) are received during connection
The first specified current potential and the second specified current potential are respectively present when sky connects.It is aobvious according to the 1st since the 1st display device X1
The second port B of showing device X1 connect the 2nd first port A of display device X2 mode be connected to step by step n-th show
Showing device Xn, n are positive integer.
Wherein, the signal that data/address bus 100 is transmitted can be pwm signal (i.e. pulse width modulating signal) or PFM letters
Number (i.e. pulse frequency modulated signal)；Data/address bus 100 is additionally operable to transmit data or instruction；Wherein, data are display effect number
According to, address configuration data or the parameter information of display device, it is that execution sequence sets instruction, operational control instruction or joins to instruct
Number sets the instruction such as instruction.Above-mentioned first specified current potential and the second specified current potential can be respectively high level and low level, Huo Zhe
One specified current potential and the second specified current potential be respectively low level and high level, the first specified current potential and the second specified current potential because
Possess the pull-up resistor or pull down resistor that are connected to first port A and second port B inside display device and formed, when
Have when first specified current potential and the second specified current potential are respectively high level and low level, inside display device and be connected to first end
The pull-up resistor (its one dc source of connection) of mouth A, and also there is the pull down resistor (its ground connection) for being connected to second port B；When
Have when first specified current potential and the second specified current potential are respectively low level and high level, inside display device and be connected to first end
The pull down resistor (its ground connection) of mouth A, and also there is the pull-up resistor (its one dc source of connection) for being connected to second port B.
In embodiments of the present invention, as shown in figure 3, the first port A or n-th display device of the 1st display device X1
The second port B of Xn is connected with data/address bus 100.Each display device (X1~Xn) is by its first port A or the second end
Mouth B carries out signal detection to determine the first display device for performing pre- selection operation.
When the 1st display device X1 is the display device of the first pre- selection operation of execution, since the 1st display device X1
Pre- selection operation is performed successively until n-th display device Xn.Now the 1st first port A and data/address bus of display device X1
100 connections, the second port B of n-th display device Xn is not connected to data/address bus 100, i.e. sky and connects.
When n-th display device Xn is the display device of the first pre- selection operation of execution, since n-th display device Xn
Pre- selection operation is performed successively until the 1st display device X1.Now, the n-th second port B and data/address bus of display device Xn
100 connections, the first port A of the 1st display device X1 is not connected to data/address bus 100, i.e. sky and connects.
Wherein, for above-mentioned data transmit-receive attribute, it refers to the first port A and second port B of display device in warp
Cross the ability for possessing data receiver or transmission after setting.Display device sets according to the execution sequence that data/address bus 100 is transmitted
Instruction settable its first port A and second port B respectively data receiver ports and data sending port are put, then first port
A is responsible for receiving data, and second port B is responsible for sending data；Display device sets according to the execution sequence that data/address bus 100 is sent
Put instruction and may also set up its first port A and second port B respectively data is activation port and data receiving port, first port
A is responsible for sending data, and second port B is responsible for receiving data.
Additionally, as shown in figure 4, the 1st the first port A and n-th second port B of display device Xn of display device X1
Can also sky connect.Each display device (X1~Xn) carries out potentiometric detection to determine head by its first port A or second port B
The individual display device for performing pre- selection operation.
When the 1st display device X1 is the display device of the first pre- selection operation of execution, since the 1st display device X1
Pre- selection operation is performed successively until n-th display device Xn.
When n-th display device Xn is the display device of the first pre- selection operation of execution, since n-th display device Xn
Pre- selection operation is performed successively until the 1st display device X1.
Operational control is sent in data/address bus 100 to instruct to before each display device (X1~Xn), simultaneously or after, often
Individual display device (X1~Xn) can carry out dynamic signal detection or potentiometric detection to its first port A or second port B.
For above-mentioned each display device (X1~Xn) signal detection is carried out by its first port A or second port B
To determine the situation of the first display device for performing pre- selection operation, it is specially：
Execution sequence that each display device (X1~Xn) can be transmitted according to data/address bus 100 set instruction set its
The data transmit-receive attribute of Single port A and second port B is respectively data receiver port and data sending port, each display device
(X1~Xn) carries out dynamic signal detection to its first port A, if the first port A of display device receives data/address bus
100 Dynamic Signals for being transmitted, then the display device is the 1st display device X1 that first port A accesses Dynamic Signal, and
It is the first display device for performing pre- selection operation.
In addition, each display device (X1~Xn) sets instruction also dependent on the execution sequence that data/address bus 100 is transmitted
Data transmit-receive attribute respectively the data is activation port and data receiving port of its first port A and second port B are set, each
Display device (X1~Xn) carries out signal detection to its second port B, if to receive data total for the second port B of display device
The Dynamic Signal that line 100 is transmitted, then the display device is n-th display device Xn that second port B accesses Dynamic Signal, and
And be the first display device for performing pre- selection operation.
For above-mentioned each display device (X1~Xn) potentiometric detection is carried out by its first port A or second port B
To determine the situation of the first display device for performing pre- selection operation, it is specially：
Execution sequence that each display device (X1~Xn) can be transmitted according to data/address bus 100 set instruction set its
The data transmit-receive attribute of Single port A and second port B is respectively data receiver port and data sending port, each display device
(X1~Xn) carries out potentiometric detection to its first port A, if the current potential of the first port A of display device is the first above-mentioned volume
Determine current potential, then the display device is the 1st display device X1 that first port A skies connect, and be the first pre- selection operation of execution
Display device.
In addition, each display device (X1~Xn) sets instruction also dependent on the execution sequence that data/address bus 100 is transmitted
When data transmit-receive attribute respectively data is activation port and the data receiving port of its first port A and second port B are set, often
Individual display device (X1~Xn) carries out potentiometric detection to its second port B, if the current potential of the second port B of display device is upper
The the second specified current potential stated, then the display device is n-th display device Xn that second port B skies connect, and is first execution
The display device of pre- selection operation.
As shown in the above, it is determined that the data transmit-receive attribute of the first port A and second port B of each display device
Afterwards, dynamic signal detection is correspondingly carried out to the first port A or second port B of each display device according to data transmit-receive attribute
Or potentiometric detection just can determine that order performs the initial display device of pre- selection operation, i.e., the above-mentioned pre- selection operation of first execution it is aobvious
Showing device, then just can one by one perform pre- selection operation up to last successively since the first display device for performing pre- selection operation
Untill individual display device.
Further, for above-mentioned pre- selection operation, it can be address configuration operation or information back operation.
In the case where the first display device for performing pre- selection operation is for the 1st display device X1, if above-mentioned pre-selection
Operate as address configuration is operated, and be comprising address when the operational control that data/address bus 100 is transmitted to each display device is instructed
When the address configuration of data is instructed, then the 1st display device X1 intercepts first address date bag and carries out from the address date
Address configuration, and the address date after interception is exported to the 2nd display device X2 by its second port B, from the 2nd display
Device X2 starts, and each display device intercepts the address date bag of first input from the address date of its first port A is reached
Row address of going forward side by side is configured, and the address date after interception is transmitted to next display device by its second port B, right with this
Each display device carries out address configuration until n-th display device Xn.
For example：Assuming that have four display devices in display system in parallel, as shown in figure 5, respectively display device X1, aobvious
Showing device X2, display device X3 and display device X4, the display device of the first pre- selection operation of execution is display device X1.In pre-selection
Operate as address configuration is operated, and when the operational control instruction that data/address bus 100 is transmitted is that the address comprising address date is matched somebody with somebody
When putting instruction, display device X1 first intercepts first address date bag after address configuration instruction is received from the address date
Row address of going forward side by side is configured, and then the address date after interception is exported to the first end of display device X2 by its second port B
The address date bag that mouthful A, display device X2 intercept first input from the address date of its first port A is reached is gone forward side by side row address
Configuration, and the address date after interception is transmitted by its second port B to the first port A of display device X3, display device
The address date bag that X3 intercepts first input from the address date of its first port A is reached is gone forward side by side row address configuration, and will be cut
Address date after taking is transmitted to the first port A of display device X4 by its second port B, display device X4 from reach its
Intercepted in the address date of Single port A first input address date bag go forward side by side row address configuration, to this just according to from display fill
Put X1 and be connected serially to the direction of display device X4 step by step and be sequentially completed whole address configuration process.
In the case where the first display device for performing pre- selection operation is for n-th display device Xn, if pre- selection operation is
Address configuration is operated, and is comprising address date when the operational control that data/address bus 100 is transmitted to each display device is instructed
When address configuration is instructed, then n-th display device Xn intercepts first address date bag row address of going forward side by side from the address date and matches somebody with somebody
Put, and the address date after interception is exported to (n-1)th display device X (n-1), from described (n-1)th by its first port A
Individual display device X (n-1) starts, and each display device intercepts first input from the address date of its second port B is reached
Address date bag is gone forward side by side row address configuration, and the address date after interception is transmitted to next display by its first port A
Device, carries out address configuration to each display device until the 1st display device X1 with this.
For example：Assuming that have four display devices in display system in parallel, as shown in fig. 6, respectively display device X1, aobvious
Showing device X2, display device X3 and display device X4, the display device of the first pre- selection operation of execution is display device X4.In pre-selection
Operate as address configuration is operated, and when the operational control instruction that data/address bus 100 is transmitted is that the address comprising address date is matched somebody with somebody
When putting instruction, display device X4 first intercepts first address date bag after address configuration instruction is received from the address date
Row address of going forward side by side is configured, and then the address date after interception is exported to the first end of display device X3 by its second port B
The address date bag that mouthful A, display device X3 intercept first input from the address date of its first port A is reached is gone forward side by side row address
Configuration, and the address date after interception is transmitted by its second port B to the first port A of display device X2, display device
The address date bag that X2 intercepts first input from the address date of its first port A is reached is gone forward side by side row address configuration, and will be cut
Address date after taking is transmitted to the first port A of display device X1 by its second port B, display device X1 from reach its
Intercepted in the address date of Single port A first input address date bag go forward side by side row address configuration, to this just according to from display fill
Put X4 and be connected serially to the direction of the first display device X4 step by step and be sequentially completed whole address configuration process.
In addition, being the 1st display device in the first display device for performing pre- selection operation in other embodiments of the present invention
In the case of X1, if pre- selection operation is operated for address configuration, and transmitted when data/address bus 100 to the operation of each display device
When control instruction is that the address configuration comprising first address and address step value is instructed, the 1st display device is carried out according to first address
Address configuration, and address more new command and address write instruction to the of the 2nd display device X2 are sent by its second port B
Single port B, since the 2nd display device X2, every time receive address more new command when, each display device by its first
Address more new command received by the A of port is transmitted to next display device by its second port B, and the rest may be inferred, and order is passed
Transport to n-th display device Xn, and each display device is when address more new command is received, according to address update instruction and
Address step value carries out primary address data renewal；If display device also receives address write instruction in its first port A,
Address configuration is then carried out according to the address date after renewal, and is write by its second port B transmission address more new commands and address
Enter instruction to next display device.
In the case where the first display device for performing pre- selection operation is for n-th display device Xn, if pre- selection operation is
Address configuration is operated, and when the operational control instruction that data/address bus 100 is transmitted to each display device is comprising first address and ground
When the address configuration of location step value is instructed, n-th display device carries out address configuration according to first address, and by its first port
A sends address more new command and address write instruction to (n-1)th second port B of display device X (n-1), aobvious from (n-1)th
Showing device X (n-1) starts, and when address more new command is received every time, each display device is by received by its second port B
Address more new command transmitted to next display device by its first port A, sequential delivery that the rest may be inferred is to described n-th
Display device Xn, and each display device is when address more new command is received, and instruction and address stepping are updated according to address
Value carries out primary address data renewal；If display device also receives address write instruction in its second port B, according to more
Address date after new carries out address configuration, and sends address more new command and address write instruction extremely by its first port A
Next display device.
Herein it should be noted that address more new command can be address updates trigger signal or address stepping times numerical control
Signal processed, address write instruction is then the instruction for controlling display device to perform address configuration operation.Below in two kinds of situation
Illustrate：
If the 1, address more new command is that address updates trigger signal, above-mentioned to update instruction and address step value according to address
The process for carrying out primary address data renewal is specially：Display device updates trigger signal according to the address, by original number of addresses
According to being added to obtain new address date with address step value.
When display device receives address write instruction, then display device performs address configuration according to new address date
Operation.
Wherein, for above-mentioned original address date, it is divided into following two situations：
(1) before the display device in first execution predetermined registration operation is not carried out address configuration operation, each display device
The address configuration instruction transmitted by data/address bus 100 can be received, first address and address stepping are included in address configuration instruction
Value, so the original address date in display device is above-mentioned first address；
(2) during multiple display devices successively order perform address configuration operation, except last performs ground
The display device of location configuration operation, remaining each display device completes to be filled to follow-up display when address configuration is operated
Put transmission address and update trigger signal, by taking the display device of last execution address configuration operation as an example, receive ground every time
Location can all complete primary address renewal when updating trigger signal, except first time address updates be increased on the basis of first address
Address stepping is worth to outside new address date, and follow-up address each time updates and is all based on last address renewal gained
The address date for arriving, so now described legacy data is exactly last address updates resulting address date.
For example：By taking four display devices shown in Fig. 5 as an example, data/address bus 100 first sends and is walked comprising first address X and address
The address configuration for entering value Y is instructed to four display devices (X1~X4), is display in the first display device for performing pre- selection operation
In the case of device X1, display device X1 start to carry out address configuration according to first address X and send address update trigger signal to
Address renewal trigger signal is sent to display device X3 by display device X2, display device X2 again, and display device X3 continues
Address renewal trigger signal is sent to display device X4, now display device X2, display device X3 and display device X4 are equal
Primary address renewal is carried out, i.e., is increased address step value Y on the basis of first address X and is obtained new address date X+Y, due to aobvious
Showing device X1 has completed address configuration, so display device X1 can also send address write instruction and give display device X2, then shows
Device X2 carries out address configuration according to the address write instruction according to above-mentioned resulting address date X+Y.
Display device X2 sends address after address configuration is completed and updates trigger signal to display device X3, display device X3
Also address renewal trigger signal is sent to display device X4, then now display device X3 and display device X4 carries out one again
Secondary address updates, i.e., increasing address step value Y on the basis of the address date X+Y obtained by upper once address updates obtains newly
Address date X+2Y, because display device X2 has completed address configuration, thus display device X2 can also send address write-in refer to
Make and give display device X3, then display device X3 is carried out according to the address write instruction according to above-mentioned resulting address date X+2Y
Address configuration.
Display device X3 sends address after address configuration is completed and updates trigger signal to display device X4, display device X4
Primary address renewal is carried out again, i.e., increase address stepping on the basis of the address date X+2Y obtained by upper once address updates
Value Y obtains new address date X+3Y, because display device X3 has completed address configuration, so display device X3 can send address
Write instruction gives display device X4, then display device X4 according to the address write instruction according to above-mentioned resulting address date X+
3Y carries out address configuration, and whole address configuration process is just completed to this.For four display devices shown in Fig. 6, performing
It is also to be realized according to above-mentioned principle in whole address configuration process, the order for simply performing address configuration operation is filled from display
Put X4 to start to perform to display device X1, therefore repeat no more.
It is above-mentioned that instruction and address step are updated according to address if the 2, address more new command is address stepping multiple control signal
Enter value and carry out the process of primary address data renewal to be specially：Display device is according to corresponding to the address stepping multiple control signal
Multiple address step value carried out into multiplication treatment obtain address increment value, and original address date is entered with the address increment value
Row is added to obtain new address date.
When display device receives address write instruction, then display device performs address configuration according to new address date
Operation.
Wherein, for above-mentioned original address date, it is divided into following two situations：
(1) before the display device in first execution predetermined registration operation is not carried out address configuration operation, each display device
The address configuration instruction transmitted by data/address bus 100 can be received, first address and address stepping are included in address configuration instruction
Value, so the original address date in display device is above-mentioned first address；
(2) during multiple display devices successively order perform address configuration operation, except last performs ground
The display device of location configuration operation, remaining each display device completes to be filled to follow-up display when address configuration is operated
Transmission address stepping multiple control signal is put, by taking the display device of last execution address configuration operation as an example, is received every time
Primary address renewal can be all completed during to address stepping multiple control signal, is in address step value except first time address updates
Outside obtaining new address date plus first address after multiplication, follow-up address each time updates and is all based on last address more
New resulting address date, so now described legacy data is exactly last address updates resulting number of addresses
According to.
For example：By taking four display devices shown in Fig. 5 as an example, data/address bus 100 first sends and is walked comprising first address X and address
The address configuration for entering value Y is instructed to four display devices (X1~X4), is display in the first display device for performing pre- selection operation
In the case of device X1, display device X1 starts to carry out address configuration according to first address X and sends address stepping multiple control letter
Number the address stepping multiple control signal is sent into display device X3 again to display device X2, display device X2, and display dress
Put X3 continue the address stepping multiple control signal is sent to display device X4, now display device X2, display device X3 and
Display device X4 carries out primary address renewal, i.e., address is walked according to multiple k corresponding with address stepping multiple control signal
Enter value Y and carry out multiplication treatment to obtain address increment value k × Y, and increase address increment value k × Y on the basis of first address X to obtain
New address date X+k × Y, because display device X1 has completed address configuration, so display device X1 can also send address and write
Enter instruction give display device X2, then display device X2 according to the address write instruction according to above-mentioned resulting address date X+k
× Y carries out address configuration.
Display device X2 sends address stepping multiple control signal to display device X3, display dress after address configuration is completed
Put X3 also to send to display device X4 the address stepping multiple control signal, then now display device X3 and display device X4 be again
Primary address renewal is all carried out, i.e., address step value Y is carried out again according to multiple k corresponding with address stepping multiple control signal
Increasing treatment obtains address increment value k × Y, and increases on the basis of the address date X+k × Y obtained by upper once address updates
Address increment value k × Y obtains new address date X+2 × k × Y, because display device X2 has completed address configuration, so display
Device X2 can also send address write instruction and give display device X3, then display device X3 according to the address write instruction according to above-mentioned
Resulting address date X+2Y carries out address configuration.
Display device X3 sends address stepping multiple control signal to display device X4, display dress after address configuration is completed
Put X4 carries out primary address renewal again, i.e., address step value Y is entered according to multiple k corresponding with address stepping multiple control signal
Row multiplication treatment obtains address increment value k × Y, and updates the base of resulting address date X+2 × k × Y in upper once address
Increase address increment value k × Y on plinth and obtain new address date X+3 × k × Y, because display device X3 has completed address configuration,
So display device X3 can send address write instruction and give display device X4, then display device X4 is pressed according to the address write instruction
Address configuration is carried out according to above-mentioned resulting address date X+3 × k × Y, whole address configuration process is just completed to this.For
Figure6Four shown display devices, are also to be realized according to above-mentioned principle in whole address configuration process is performed, and are simply performed
The order of address configuration operation is performed to display device X1 since display device X4, therefore is repeated no more.
During in embodiments of the present invention, for budget operation for information back operation, details are as follows：
In the case where the first display device for performing pre- selection operation is for the 1st display device X1, if pre- selection operation is
Information back is operated, and data/address bus 100 transmits the operational control instruction to each display device for information back control instruction,
Then corresponding parameter information is returned to data/address bus 100 by the 1st display device X1 according to the information back control instruction, and is led to
Its second port B output passback triggering commands are crossed to the 2nd first port A of display device X2, is opened from the 2nd display device X2
Begin, corresponding parameter information is returned to number by passback triggering command of each display device according to received by its first port A
According to bus 100, and passback triggering command to next display device is exported by its second port B, each display dress is made with this
Put successively to the passback parameter information of data/address bus 100 until n-th display device Xn.
In the case where the first display device for performing pre- selection operation is for n-th display device Xn, if pre- selection operation is
Information back is operated, and data/address bus 100 transmits the operational control instruction to each display device for information back control instruction,
Then corresponding parameter information is returned to data/address bus 100 by n-th display device Xn according to the information back control instruction, and is led to
Its first port A outputs passback triggering command to (n-1)th second port B of display device X (n-1) is crossed, from (n-1)th display
Device X (n-1) starts, and passback triggering command of each display device according to received by its second port B is by corresponding parameter
Information back exports passback triggering command to next display device to data/address bus 100 by its first port A, with this
Make each display device successively to the passback parameter information of data/address bus 100 until the 1st display device X1.
Wherein, information back control instruction is the transmission of data/address bus 100 for informing that each display device enters information
Return the instruction of execution state；Passback triggering command is that display device triggers next display dress after information back operation is completed
Put the instruction of execution information back delivery operations；Parameter information can be the address information of display device, temperature information, information of voltage,
Various types of information such as current information and function code information.
For example：By taking four display devices (X1~X4) shown in Fig. 7 as an example, the display dress of first execution information back delivery operations
It is set to display device X1, it is assumed that need display device loop back address information, then display device X1 returns its address information to data
Bus 100, and first port A of the passback triggering command to display device X2 is exported by its second port B；Display device X2 roots
Its address information is returned to data/address bus 100 according to the passback triggering command, and passback triggering command is exported by its second port B
To the first port A of display device X3；Display device X3 returns its address information to data/address bus according to the passback triggering command
100, and first port A of the passback triggering command to display device X4 is exported by its second port B；Display device X4 is according to this
Passback triggering command returns its address information to data/address bus 100, and whole information back operating process is just completed to this.For
Four display devices shown in Fig. 8, are also to be realized according to above-mentioned principle in whole information back operating process is performed, simply
The order of execution information back delivery operations is performed to display device X1 since display device X4, therefore is repeated no more.
Additionally, for the display device (X1~Xn) shown in Fig. 3 and Fig. 4, being sent out to each display device in data/address bus 100
When going out parameter setting instruction, each display device can also perform corresponding parameter setting operation according to the parameter setting instruction.
Wherein, above-mentioned parameter setting instruction can be that upper electric display effect sets instruction, tonal gradation setting instruction, drives
Streaming current sets various types of settings the such as instruction, function code setting instruction, protocol rate setting instruction and instructs, and correspondence is above-mentioned respectively
Parameter setting instruction is planted, display device can correspondingly to upper electric display effect, tonal gradation, driving current, function code and agreement
The parameters such as speed are configured.
In sum, the embodiment of the present invention is connected in parallel in data by display system in parallel using one or more
The display device (X1~Xn) of bus 100, data/address bus 100 is used to transmit data or instruction, and each display device is by it
First port A or second port B carry out signal detection to determine the first display device for performing pre- selection operation, are then held from first
The display device of the pre- selection operation of row sequentially performs pre- selection operation successively until last display device, the 1st display device
The second port B of the first port A of X1 and n-th display device Xn is not connected to external equipment, it is to avoid wiring is complicated and signal
The problem of interference, helps to reduce project installation and debugging cost, and be easy to carry out maintenance and management to display system in parallel.
Based on the above-mentioned advantage possessed using above-mentioned display device in display system in parallel, the embodiment of the present invention is also provided
A kind of display system in parallel, it includes control device and one or more above-mentioned display devices, the control device passes through
Above-mentioned data/address bus 100 connects one or more above-mentioned display devices.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of display device of display system in parallel, multiple display devices are connected in parallel in data/address bus, each display device
With first port and second port, the first port or second port of each display device with the data/address bus when being connected
Receive the signal that the data/address bus is transmitted；Since the 1st display device, according to the second of the 1st display device
The mode that port connects the 2nd first port of display device is connected to n-th display device step by step, and n is positive integer；Its
It is characterised by：
The data/address bus is additionally operable to transmit data or instruction；
Each display device determines the first pre- selection operation of execution by carrying out signal detection to its first port or second port
Display device；
The first port and second port of each display device are respectively present the first specified current potential and the second specified electricity when sky connects
Position；Each display device determines the first pre- selection operation of execution by carrying out potentiometric detection to its first port or second port
Display device.
2. display device as claimed in claim 1, it is characterised in that each display device is transmitted according to the data/address bus
Execution sequence set instruction set its first port and second port data transmit-receive attribute be respectively data receiver port and
Data is activation port, each display device carries out potentiometric detection to its first port, if the electricity of the first port of display device
Position is the described first specified current potential, then the display device is the 1st display device that first port sky connects, and for first
Perform the display device of the pre- selection operation.
3. display device as claimed in claim 1, it is characterised in that each display device is transmitted according to the data/address bus
Execution sequence set instruction set its first port and second port data transmit-receive attribute be respectively data is activation port and
Data receiver port, each display device carries out potentiometric detection to its second port, if the electricity of the second port of display device
Position is the described second specified current potential, then the display device is n-th display device that second port sky connects, and for first
Perform the display device of the pre- selection operation.
4. display device as claimed in claim 1 or 2, it is characterised in that the display device of the first execution pre- selection operation
It is the 1st display device；The pre- selection operation is operated for address configuration；
When the operational control instruction of the data bus transmission to each display device is that the address configuration comprising address date refers to
When making, the 1st display device intercepted from the address date first address date bag go forward side by side row address configuration, and will cut
Address date after taking is exported to the 2nd display device by its second port, since the 2nd display device, each
Display device from reach its first port address date in intercept first input address date bag go forward side by side row address configuration, and
Address date after interception is transmitted to next display device by its second port, carries out ground to each display device with this
Location configuration is until n-th display device；
When operational control instruction is that the address configuration comprising first address and address step value is instructed, the 1st display
Device carries out address configuration according to the first address, and sends address more new command and address write instruction by its second port
To the 2nd first port of display device, since the 2nd display device, when address more new command is received every time,
Each display device transmits to next display the more new command of the address received by its first port by its second port
Device, sequential delivery that the rest may be inferred to n-th display device, and each display device is receiving address more new command
When, updating instruction and the address step value according to address carries out primary address data renewal；If display device its first
Port also receives address write instruction, then carry out address configuration according to the address date after renewal, and by its second port
Send address more new command and address write instruction to next display device.
5. the display device as described in claim 1 or 3, it is characterised in that the display device of the first execution pre- selection operation
It is n-th display device；The pre- selection operation is operated for address configuration；
When the operational control instruction of the data bus transmission to each display device is that the address configuration comprising address date refers to
When making, n-th display device intercepted from the address date first address date bag go forward side by side row address configuration, and will cut
Address date after taking is exported to (n-1)th display device by its first port, since (n-1)th display device,
The address date bag row address of going forward side by side that each display device intercepts first input from the address date of its second port is reached is matched somebody with somebody
Put, and the address date after interception is transmitted to next display device by its first port, with this to each display device
Address configuration is carried out until the 1st display device；
When operational control instruction is that the address configuration comprising first address and address step value is instructed, n-th display
Device carries out address configuration according to the first address, and sends address more new command and address write instruction by its first port
To (n-1)th second port of display device, since (n-1)th display device, refer to receiving address every time and updating
When making, each display device transmits to next the more new command of address received by its second port by its first port
Display device, sequential delivery that the rest may be inferred to n-th display device, and each display device are receiving address renewal
During instruction, updating instruction and the address step value according to address carries out primary address data renewal；If display device is at it
Second port also receives address write instruction, then carry out address configuration according to the address date after renewal, and by its first
Port sends address more new command and address write instruction to next display device.
6. display device as claimed in claim 1 or 2, it is characterised in that the display device of the first execution pre- selection operation
It is the 1st display device；The pre- selection operation is operated for information back, the data bus transmission to each display device
Operational control instruction be information back control instruction；
It is total that corresponding parameter information is returned to the data by the 1st display device according to described information passback control instruction
Line, and passback triggering command is exported to the 2nd first port of display device by its second port, from the 2nd display device
Start, corresponding parameter information is returned to institute by passback triggering command of each display device according to received by its first port
Data/address bus is stated, and passback triggering command to next display device is exported by its second port, each display dress is made with this
Put successively to data/address bus passback parameter information until n-th display device.
7. the display device as described in claim 1 or 3, it is characterised in that the display device of the first execution pre- selection operation
It is n-th display device；
The pre- selection operation is operated for information back, and the operational control instruction of the data bus transmission to each display device is
Information back control instruction；
It is total that corresponding parameter information is returned to the data by n-th display device according to described information passback control instruction
Line, and passback triggering command to (n-1)th second port of display device is exported by its first port, from (n-1)th display
Device starts, and passback triggering command of each display device according to received by its second port returns corresponding parameter information
To the data/address bus, and passback triggering command to next display device is exported by its first port, each is shown with this
Showing device is successively to data/address bus passback parameter information until the 1st display device.
8. display device as claimed in claim 1, it is characterised in that send ginseng to each display device in the data/address bus
When number sets instruction, each display device performs corresponding parameter setting operation according to the parameter setting instruction.
9. a kind of display system in parallel, including control device, it is characterised in that the display system in parallel also includes multiple as weighed
Profit requires the display device described in 1 to 8 any one, and the control device connects multiple above-mentioned displays and fills by data/address bus
Put.
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| CN109697035B (en) * | 2018-12-24 | 2022-03-29 | 深圳市明微电子股份有限公司 | Writing method of address data of cascade equipment, writing equipment and storage medium |
| CN110032537B (en) * | 2019-03-27 | 2021-04-09 | 深圳市明微电子股份有限公司 | Address writing method, address writing device and computer readable storage medium |
| CN110085163B (en) * | 2019-04-25 | 2021-03-02 | 深圳市洲明科技股份有限公司 | LED display cascade control circuit and LED display screen |
| CN110379357B (en) * | 2019-06-05 | 2020-11-27 | 宗仁科技(平潭)有限公司 | Control method and device for parallel LED drive circuit |
| CN110708793B (en) * | 2019-09-26 | 2021-03-23 | 深圳市明微电子股份有限公司 | Cascade control method of cascade equipment, cascade equipment and illumination system |
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