CN105676700B - A kind of control method of display device and display device - Google Patents

A kind of control method of display device and display device Download PDF

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Publication number
CN105676700B
CN105676700B CN201610109114.9A CN201610109114A CN105676700B CN 105676700 B CN105676700 B CN 105676700B CN 201610109114 A CN201610109114 A CN 201610109114A CN 105676700 B CN105676700 B CN 105676700B
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CN
China
Prior art keywords
display device
memory
mating
working condition
signal
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CN201610109114.9A
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Chinese (zh)
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CN105676700A (en
Inventor
刘伟
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广州视睿电子科技有限公司
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Priority to CN201610109114.9A priority Critical patent/CN105676700B/en
Publication of CN105676700A publication Critical patent/CN105676700A/en
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Publication of CN105676700B publication Critical patent/CN105676700B/en

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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/04Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/14Display of multiple viewports

Abstract

The invention discloses a kind of display device, including:First memory, for storing program required under single screen working condition;Second memory, for storing program required under multi-screen working condition;Transmission port, for receiving the signal that other mating display devices are sent;Controller, for according to transmission port received signal, judging whether this display device interconnects with other mating display devices;If so, closing first memory, second memory is opened, makes the display device interconnection composition multi-screen device that this display device is mating with other, in multi-screen working condition;If it is not, then opening first memory, second memory is closed, this display device is made to work independently as single screen equipment, in single screen working condition.The invention also discloses a kind of control methods of display device.Implement the present invention, display device can work independently but also form multi-screen device with other mating display devices, and two kinds of working conditions are not interfere with each other, can normal operation.

Description

A kind of control method of display device and display device

Technical field

The present invention relates to field of computer technology more particularly to the control methods of a kind of display device and display device.

Background technology

Early stage computer system is mainly made of three parts:Display, host and input equipment, with the hair of display technology Kinescope has been eliminated in exhibition, particularly liquid crystal display, and manufacturer computer starts host to be integrated into display, has gradually appeared existing Computer all-in-one machine, smart television, intelligent interaction tablet in technology etc. have both the display device of computer function;These displays are set It is standby to have incorporated the multinomial technology such as human-computer interaction, FPD, multimedia signal processing and network transmission, it is business in the information age The preferred solution of the interactive demonstrations such as display, office, teaching.In recent years, it is big to be spliced by multiple display devices Screen picture shows to have obtained wider application, super large picture, multihead display and display clear, true to nature caused by it Effect causes the work efficiency in the fields such as monitoring, security protection, meeting to be greatly improved, while promotes these industry technologies level Rapid advances.

Two or more display devices are fixedly connected by common splicing large screen, i.e. multi-screen device in design process Together, since size is larger, many difficulties are often had in the handling process;And in practice, splicing large screen makes It is not high with frequency, for example the splicing large screen of meeting room is used in, the idle of resource is will result in when no meeting. Accordingly it is contemplated that be not fixedly connected with multiple display devices during designing and producing, and when in use again by display device It is stitched together, the program for realizing multiple display devices by two-way communication link line interconnects, and thus can individually transport each Display device reduces the difficulty in transportational process.But if such display device is only capable of getting up to use in splicing interconnection, It cannot be used during as individual complete machine and the waste of resource.It is and a variety of due to having when display device splices interconnection work Operating mode (for example multiple display devices may be selected screen extension or replicate display), therefore, when interconnection is got up to work, operation system System, application software, UI (Use Interface, user interface) when run element all can be with working separately as complete machine when Difference, these operation elements are correspondingly stored in storage address in memory in the form of program;Therefore, if display Memory in equipment places program when interconnection is got up, then being used as during independent complete machine cannot use, and individually make if placed For complete machine when program, work again can be abnormal when that may be interconnected.It in the prior art can be not mating with other Display device used in combination as splicing large screen, and can work independently and the display device of normal operation and support this The control method of kind display device.

The content of the invention

The purpose of one aspect of the present invention is, provides a kind of display device that can be mating with other in combination as more Screen equipment uses, and can work independently, and two kinds of working conditions are interference-free mutually, and the display device of energy normal operation solves In the prior art, the problems such as multi-screen device difficult, resources idle wastes.

To achieve these goals, the present invention provides a kind of display device, including:

First memory, for storing program required under single screen working condition;

Second memory, for storing program required under multi-screen working condition;

Transmission port, for receiving the signal that other mating display devices are sent;

Controller, for according to the transmission port received signal, judging whether this display device is mating with other Display device interconnection;If so, closing the first memory, the second memory is opened, makes this display device and its He forms multi-screen device at mating display device interconnection, in multi-screen working condition;If it is not, the first memory is then opened, The second memory is closed, this display device is made to work independently as single screen equipment, in single screen working condition.

Further, the controller is used for according to the transmission port received signal, judges that this display device is It is no to be interconnected with other mating display devices, be specially:

In this display device starting-up, timing is performed;

Detect whether the transmission port receives n times interconnection signal in first time threshold value;If so, determine that this is aobvious Show that equipment is interconnected with other mating display devices;If not, it is determined that this display device is not mutual with other mating display devices Even;Wherein, N >=1.

Further, the transmission port is additionally operable in this display device starting-up, and the display device mating to other is sent out Send interconnection signal.

In one of the embodiments, the first chip select terminal mouth, the second memory are configured on the first memory On be configured with the second chip select terminal mouth;

The controller to the first chip select terminal mouth by sending effective first chip selection signal, to open described first Memory;The controller is by sending the first invalid chip selection signal to the first chip select terminal mouth, to close described first Memory;

The controller to the second chip select terminal mouth by sending effective second chip selection signal, to open described second Memory;The controller is by sending the second invalid chip selection signal to the second chip select terminal mouth, to close described second Memory.

In one of the embodiments, the display device further includes:

First switch circuit, for the power supply of first memory described on or off;

Second switch circuit, for the power supply of second memory described on or off;

The controller to the first switch circuit by sending effective first enable signal, so that described first opens The power supply of first memory described in circuit turn-on is closed, opens the first memory;The controller to described first by opening Powered-down road sends the first invalid enable signal, so that the first switch circuit turns off the power supply of the first memory, closes Close the first memory;

The controller to the second switch circuit by sending effective second enable signal, so that described second opens The power supply of second memory described in circuit turn-on is closed, opens the second memory;The controller to described second by opening Powered-down road sends the second invalid enable signal, so that the second switch circuit turns off the power supply of the second memory, closes Close the second memory.

Further, the display device further includes:

3rd memory, for storing program required under the single screen working condition of backup;

4th memory, for storing program required under the multi-screen working condition of backup;

The controller be additionally operable to determine this display device not with other mating display devices interconnection after, if the The first memory cisco unity malfunction is detected in two time thresholds, then opens the 3rd memory;

The controller is additionally operable to after the display device interconnection mating with other of this display device is determined, if second The second memory cisco unity malfunction is detected in time threshold, then opens the 4th memory.

Preferably, the transmission port is to support the port of RS232 signal transmissions.

The purpose of another aspect of the present invention is, provides a kind of control method of display device, makes display device can be with Other mating display devices are used in combination as multi-screen device, and can be worked independently, and two kinds of working conditions are mutually not It is disturbed, it can normal operation.

To achieve these goals, the present invention provides a kind of control method of display device, including:

The signal of other mating display devices transmissions is received by transmission port;

According to the transmission port received signal, judge whether this display device is mutual with other mating display devices Even;If so, closing the first memory in this display device, the second memory in this display device is opened, makes this display The equipment display device interconnection composition multi-screen device mating with other, in multi-screen working condition;If it is not, then open described first Memory closes the second memory, this display device is made to work independently as single screen equipment, in single screen working condition;

Wherein, the program needed for single screen working condition, the second memory storage are stored in the first memory There is the program needed for multi-screen working condition.

Further, the control method of the display device further includes:

After determining that this display device does not interconnect with other mating display devices, if being detected in the second time threshold To the first memory cisco unity malfunction, then the 3rd memory is opened;

After the display device interconnection mating with other of this display device is determined, if being detected in the second time threshold The second memory cisco unity malfunction then opens the 4th memory;

Wherein, the program needed for the single screen working condition of backup, the 4th storage are stored in the 3rd memory Device is stored with the program needed for the multi-screen working condition of backup.

Further, it is described according to the transmission port received signal, judge whether this display device matches somebody with somebody with other The display device interconnection of set, specially:

In this display device starting-up, timing is performed;

Detect whether the transmission port receives n times interconnection signal in first time threshold value;If so, determine that this is aobvious Show that equipment is interconnected with other mating display devices;If not, it is determined that this display device is not mutual with other mating display devices Even;Wherein, N >=1..

Implement the present invention, have the advantages that:

The control method of display device and display device provided in an embodiment of the present invention is equipped with two memories, according to biography The signal that other mating display devices that defeated interface is received are sent, judge this display device whether the display mating with other Apparatus interconnection further, judges to run first memory or second memory;Since two memories store single screen respectively Program needed under program and multi-screen working condition needed under working condition, i.e., operating system under single screen working condition are answered It is respectively stored in operating system, application software and the UI under software and UI and multi-screen working condition in two memories mutually not Interference;Therefore, display device provided by the invention can be in single screen working condition, independent to work normally;It can match somebody with somebody again with other The display device composition multi-screen device of set is in multi-screen working condition, runs interconnecting program;And two kinds of working conditions are not interfere with each other, It can normal operation.Solve in the prior art, multi-screen device transport difficult, resources idle waste the problems such as.

Description of the drawings

Fig. 1 is the block diagram of display device provided by the invention;

Fig. 2 is the schematic diagram of the first embodiment of display device provided by the invention;

Fig. 3 is the schematic diagram of the second embodiment of display device provided by the invention;

Fig. 4 is a kind of schematic diagram of embodiment of the first switch circuit in second embodiment of the invention;

Fig. 5 is the flow chart of the control method of display device provided by the invention.

Specific embodiment

Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts Embodiment belongs to the scope of protection of the invention.

Referring to Fig. 1, Fig. 1 is the block diagram of display device provided by the invention, which includes:

First memory 1, for storing program required under single screen working condition;

Second memory 2, for storing program required under multi-screen working condition;

Transmission port 3, for receiving the signal that other mating display devices are sent;

Controller 4, for according to 3 received signal of transmission port, judging whether this display device is mating with other Display device interconnects;If so, closing first memory 1, second memory 2 is opened, makes this display device mating with other Display device interconnection composition multi-screen device, in multi-screen working condition;If it is not, then opening first memory 1, the second storage is closed Device 2 makes this display device work independently as single screen equipment, in single screen working condition.

Wherein, controller 4 is used for according to transmission port received signal, judges whether this display device is mating with other Display device interconnection, be specially:

In this display device starting-up, timing is performed;

Whether detection transmission port 3 receives n times interconnection signal in first time threshold value;If so, determine this display Equipment is interconnected with other mating display devices;If not, it is determined that this display device does not interconnect with other mating display devices; Wherein, N >=1.

Further, transmission port 3 is additionally operable in this display device starting-up, and the display device mating to other sends mutual Even signal.

Display device provided by the invention, is equipped with first memory 1 and second memory 2, under single screen working condition Operating system, application software and UI etc. are stored in the form of program in first memory 1, the operation system under multi-screen working condition System, application software and UI etc. are stored in the form of program in second memory 2;

When this display device and other mating display devices interconnect, controller 4 performs timing after start, due to The transmission port sent and received signal 3 is equipped with, therefore, if to this display device after other mating display device starting-ups Interconnection signal is sent, transmission port 3 can receive interconnection signal, and controller 4 can detect that transmission connects in first time threshold value Mouth 3 has received interconnection signal, determines that this display device is interconnected with other mating display devices, then closes first memory 1, Second memory 2 is opened, makes the display device interconnection composition multi-screen device that this display device is mating with other, works in multi-screen State;

In order to improve the reliability of judgement interconnection, it can set to work as to receive repeatedly to interconnect in first time threshold value and believe Number, it just determines that this display device is interconnected with other mating display devices, that is, is arranged in first time threshold value that receive n times mutual Even signal just determines that this display device is interconnected with other mating display devices;While controller performs timing after powering, This display device sends interconnection signal also by transmission port 3 to other mating display devices, to ensure that other are mating aobvious Show that equipment can also receive interconnection signal, the display device for making other mating is also at multi-screen working condition;

When the display device mating with other does not interconnect display device, after display device starting-up, controller 4 is held Row timing, will not receive interconnection signal in first time threshold value, thus controller 4 can determine this display device not with other Mating display device interconnection, then opens first memory 1, closes second memory 2, this display device is made to be set as single screen It is standby to work independently, in single screen working condition.

Referring to Fig. 2, Fig. 2 is the schematic diagram of the first embodiment of display device provided by the invention;In the present embodiment, transmission Port 3 is UART ports, is configured with the first chip select terminal mouth 11 on first memory 1, second choosing is configured on second memory 2 Port 21;

Controller 4 to the first chip select terminal mouth 11 by sending effective first chip selection signal, to open first memory 1; By sending the first invalid chip selection signal to the first chip select terminal mouth 11, to close first memory 1;By to the second chip select terminal Mouth 21 sends effective second chip selection signals, to open second memory 2;By sending invalid to the second chip select terminal mouth 21 Two chip selection signals, to close second memory 2.

After it is in single screen working condition or multi-screen working condition that display device, which determines, display device starts work Make, be equipped with central processing unit 7 in display device, in the course of work, the central processing unit 7 of display device sends address to address In bus, address bus is divided into two, and connects first memory 1 and second memory 2 respectively, due to only being opened there are one memory It opens, therefore the address only sent to central processing unit 7 there are one memory to be reacted, and the corresponding program in the address is returned to Central processing unit 7.

In the case where central processing unit 7 detects that same user inputs information, due under single screen working condition and more The memory opened under screen working condition is different, therefore the program called is different, and the operation of execution is also different, multi-screen working condition Lower display device has the function of abundant information sharing.Such as when user is carried out by modes such as remote controler, keyboard or touch-screens During volume adjustment, if being that first memory 1 is opened in display device, central processing unit 7 obtains the journey of the passback of first memory 1 The operation performed after sequence is only to carry out volume adjustment to this display device;And if being that second memory 2 is opened in display device, I.e. in multi-screen working condition, the operation that central processing unit 7 obtains performing after the program of the passback of second memory 2 is not only originally to show Show that equipment carries out volume adjustment, it would also be desirable to which the information of volume adjustment passes to other mating display devices, synchronizes tune It is whole;Under double screen working condition, based on the program in second memory 2, print screen or extension, i.e. this display can also carry out Equipment shows that same image or extension are merged into a display image screen with other mating display devices;This display is set Standby can also cooperate with other mating display devices realizes passage switching, for example, this current display device is matched somebody with somebody with one The display device extension of set shows an image, when user switches this display device into row of channels, mating display device Current image is shown alone, this display device then can perform other operations of user.

Further, the display device in the present embodiment further includes:

3rd memory 5, for storing program required under the single screen working condition of backup;

4th memory 6, for storing program required under the multi-screen working condition of backup;

The controller 4 is additionally operable to after determining that this display device does not interconnect with other mating display devices, if 1 cisco unity malfunction of first memory is detected in second time threshold, then opens the 3rd memory 5;The control Device 4 processed is additionally operable to after the display device interconnection mating with other of this display device is determined, if being examined in the second time threshold 2 cisco unity malfunction of second memory is measured, then opens the 4th memory 6.

In the present embodiment, during display device is in single screen working condition, and first memory 1 damages, can not be right Central processing unit 7 send address react, controller 4 by with 7 connecting detection of central processing unit in the second time threshold 1 cisco unity malfunction of first memory in value, then open the 3rd memory 5, and the 3rd memory 5 is by the single screen working condition of backup Under required program return to central processing unit, that is, reach the mesh for also having stand-by program that can run after first memory 1 damages 's.

During display device is in multi-screen working condition, and second memory 2 damages, and central processing unit can not be sent out The address sent is reacted, controller 4 by with 7 connecting detection of central processing unit to the second memory in the second time threshold 2 cisco unity malfunctions, then open the 4th memory 6, and the 4th memory 6 returns program required under the multi-screen working condition of backup Central processing unit is transmitted to, that is, achievees the purpose that second memory 2 also has stand-by program that can run after damaging.

Further, if necessary to upgrade to the program in memory, than if desired for the storage medium for passing through outside First memory 1 is upgraded, then under single screen working condition, central processing unit 7 reads program in storage medium to the 1 program of one memory is upgraded, and after upgrading, controller 4 closes first memory 1, opens the 3rd memory 5, in Central processor 7 upgrades stand-by program.The upgrading principle of second memory 2 is similar with first memory, herein not in detail It repeats.

Referring to Fig. 3, Fig. 3 is the schematic diagram of the second embodiment of display device provided by the invention;The present embodiment with it is above-mentioned The difference of embodiment is:Transmission port 3 is supports the port of RS232 signal transmissions, for example, transmission port 3 can be RS232 Port, or the port for the support RS232 signal transmissions that UART ports are formed by UART RS 232 circuits 10;When aobvious Show that the reasons such as equipment size is larger or the position of controller is set cause controller 4 and other mating displays of this display device When the controller distance of equipment is more than 10cm, the reliability transmitted at a distance is can guarantee using RS232 signal transmissions;

In addition, in the present embodiment, display device further includes:

First switch circuit 8, for the power supply of first memory described on or off;

Second switch circuit 9, for the power supply of second memory described on or off;

The controller 4 to the first switch circuit 8 by sending effective first enable signal, so that described first On-off circuit 8 turns on the power supply VCC of the first memory 1, opens the first memory 1;The controller 4 is by institute It states first switch circuit 8 and sends the first invalid enable signal, so that the first switch circuit 8 turns off the first memory 1 power supply closes the first memory 1;

The controller 4 to the second switch circuit 9 by sending effective second enable signal, so that described second On-off circuit 9 turns on the power supply VCC of the second memory 2, opens the second memory 2;The controller 4 is by institute It states second switch circuit 9 and sends the second invalid enable signal, so that the second switch circuit 9 turns off the second memory 2 power supply VCC closes the second memory 2.

Referring to Fig. 4, Fig. 4 is a kind of schematic diagram of embodiment of the first switch circuit in second embodiment of the invention; The first switch circuit 8 includes Enable Pin EN, output terminal OUT, power connector end and field-effect tube Q1, triode Q2, first Resistance R1, second resistance R2,3rd resistor R3, the first capacitance C1, the second capacitance C2.Specifically, Enable Pin EN is controlled for connecting Device 4 processed, for connecting first memory 1, power connector end is used to connect power supply VCC output terminal OUT;Power connector end connection the The first end of one resistance R1, the first end of Enable Pin EN connection 3rd resistors, the second end connecting triode Q2's of 3rd resistor Base stage, the emitter ground connection of triode Q2, the second end of collector connection first resistor R1, the collector of triode Q2 are also connected with The first end of second resistance R2, the grid of the second end connection field-effect tube Q1 of second resistance R2, the source electrode of field-effect tube Q1 connect Meet power connector end, the drain electrode connection output terminal OUT of field-effect tube;

In present embodiment, effective first enable signal is high level signal, when controller 4 is to first switch circuit 8 Effective first enable signal is sent, i.e. Enable Pin EN is high level, and triode Q2 conductings, the grid of field-effect tube Q2 leads at this time Second resistance R2 ground connection is crossed, source electrode connection power supply VCC, the pressure drop between source electrode and grid is big, therefore field-effect tube Q1 is turned on, and first Memory 1 is powered, therefore opens first memory 1;The first invalid enable signal is low level, and Enable Pin EN is low During level, triode Q2 cut-offs, the grid of field-effect tube Q2 connects power supply VCC, source by second resistance R2 with first resistor R1 Pole connects power supply VCC, and the pressure drop between source electrode and grid is small, therefore field-effect tube Q1, and first memory 1 is not powered, therefore closes First memory 1 is closed.The circuit structure of second switch circuit 9 is identical with first switch circuit 8, and this will not be repeated here.

Referring to Fig. 5, Fig. 5 is the flow chart of the control method of display device provided by the invention;The control of the display device Method includes:

S1, the signal that other mating display devices are sent is received by transmission port;

S2, according to the transmission port received signal, judge whether the display mating with other is set this display device Standby interconnection;

S3, if so, closing the first memory in this display device, open the second memory in this display device, Make the display device interconnection composition multi-screen device that this display device is mating with other, in multi-screen working condition;

S4, if it is not, then opening the first memory, close the second memory, make this display device be used as single screen Equipment works independently, in single screen working condition;

Wherein, the program needed for single screen working condition, the second memory storage are stored in the first memory There is the program needed for multi-screen working condition.The display device is the display device that above-described embodiment provides.

When it is implemented, step S2 can include:

In this display device starting-up, timing is performed;

Detect whether the transmission port receives n times interconnection signal in first time threshold value;If so, determine that this is aobvious Show that equipment is interconnected with other mating display devices;If not, it is determined that this display device is not mutual with other mating display devices Even;Wherein, N >=1.

Using the control method of the display device, the controller in display device is sentenced according to delivery port received signal Whether this disconnected display device interconnects with other mating display devices, determines which memory used according to judging result, therefore, Display device can use dedicated memory, without there are two kinds of working conditions are mutual no matter under which kind of working condition Interference, work abnormal problem.

Specifically, the control method of the display device further includes:

After determining that this display device does not interconnect with other mating display devices, if being detected in the second time threshold To the first memory cisco unity malfunction, then the 3rd memory is opened;

After the display device interconnection mating with other of this display device is determined, if being detected in the second time threshold The second memory cisco unity malfunction then opens the 4th memory;

Wherein, the program needed for the single screen working condition of backup, the 4th storage are stored in the 3rd memory Device is stored with the program needed for the multi-screen working condition of backup.

Equipped with the 3rd memory and the display device of the 4th memory, using the display control method, can also realize When first memory or second memory damage, have stand-by program that can run, improve display device operation can By property.

The control method of display device and display device provided in an embodiment of the present invention is equipped with two memories, according to biography The signal that other mating display devices that defeated interface is received are sent, judge this display device whether the display mating with other Apparatus interconnection then judges operation first memory or second memory;Since two memories store single screen work respectively Program needed under program and multi-screen working condition needed under state, therefore, display device provided by the invention can be in Single screen working condition, it is independent to work normally;Display device composition multi-screen device that again can be mating with other is in multi-screen work shape State, operation interconnection program;And two kinds of working conditions are not interfere with each other, it can normal operation.It solves in the prior art, multi-screen device The problems such as transport difficult, resources idle waste.

The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, without departing from the principle of the present invention, several improvement and deformation can also be made, these are improved and deformation is also considered as Protection scope of the present invention.

Claims (8)

1. a kind of display device, which is characterized in that including:
First memory, for storing program required under single screen working condition;
Second memory, for storing program required under multi-screen working condition;
Transmission port, for receiving the signal that other mating display devices are sent;
Controller, for according to the transmission port received signal, judging whether this display device is mating aobvious with other Show apparatus interconnection;If so, closing the first memory, the second memory is opened, this display device is made to match somebody with somebody with other The display device interconnection composition multi-screen device of set, in multi-screen working condition;If it is not, then opening the first memory, close The second memory makes this display device work independently as single screen equipment, in single screen working condition;
The display device further includes:
3rd memory, for storing program required under the single screen working condition of backup;
4th memory, for storing program required under the multi-screen working condition of backup;
The controller is additionally operable to after determining that this display device does not interconnect with other mating display devices, if at second Between detect the first memory cisco unity malfunction in threshold value, then open the 3rd memory;
The controller is additionally operable to after the display device interconnection mating with other of this display device is determined, if in the second time The second memory cisco unity malfunction is detected in threshold value, then opens the 4th memory.
2. display device as described in claim 1, which is characterized in that the controller is used to be connect according to the transmission port The signal of receipts, judges whether this display device interconnects with other mating display devices, is specially:
In this display device starting-up, timing is performed;
Detect whether the transmission port receives n times interconnection signal in first time threshold value;If so, determine that this display is set It is standby to be interconnected with other mating display devices;If not, it is determined that this display device does not interconnect with other mating display devices;Its In, N >=1.
3. display device as claimed in claim 2, which is characterized in that the transmission port is additionally operable in this display device starting-up When, the display device mating to other sends interconnection signal.
4. display device as described in any one of claims 1 to 3, which is characterized in that is configured on the first memory It is a piece of to select port, the second chip select terminal mouth is configured on the second memory;
The controller to the first chip select terminal mouth by sending effective first chip selection signal, to open first storage Device;The controller is by sending the first invalid chip selection signal to the first chip select terminal mouth, to close first storage Device;
The controller to the second chip select terminal mouth by sending effective second chip selection signal, to open second storage Device;The controller is by sending the second invalid chip selection signal to the second chip select terminal mouth, to close second storage Device.
5. display device as described in any one of claims 1 to 3, which is characterized in that the display device further includes:
First switch circuit, for the power supply of first memory described on or off;
Second switch circuit, for the power supply of second memory described on or off;
The controller to the first switch circuit by sending effective first enable signal, so that the first switch is electric Road turns on the power supply of the first memory, opens the first memory;The controller passes through electric to the first switch Road sends the first invalid enable signal, so that the first switch circuit turns off the power supply of the first memory, closes institute State first memory;
The controller to the second switch circuit by sending effective second enable signal, so that the second switch is electric Road turns on the power supply of the second memory, opens the second memory;The controller passes through electric to the second switch Road sends the second invalid enable signal, so that the second switch circuit turns off the power supply of the second memory, closes institute State second memory.
6. display device as described in any one of claims 1 to 3, which is characterized in that the transmission port is support RS232 letters Number transmission port.
7. a kind of control method of display device, which is characterized in that including:
The signal of other mating display devices transmissions is received by transmission port;
According to the transmission port received signal, judge whether this display device interconnects with other mating display devices; If so, closing the first memory in this display device, the second memory in this display device is opened, makes this display device Mating display device interconnection composition multi-screen device with other, in multi-screen working condition;If it is not, then open first storage Device closes the second memory, this display device is made to work independently as single screen equipment, in single screen working condition;
Wherein, the program needed for single screen working condition is stored in the first memory, the second memory is stored with more Shield the program needed for working condition;
The control method of the display device further includes:
After determining that this display device does not interconnect with other mating display devices, if detecting institute in the second time threshold First memory cisco unity malfunction is stated, then opens the 3rd memory;
After the display device interconnection mating with other of this display device is determined, if being detected in the second time threshold described Second memory cisco unity malfunction then opens the 4th memory;
Wherein, the program needed for the single screen working condition of backup is stored in the 3rd memory, the 4th memory is deposited Contain the program needed for the multi-screen working condition of backup.
8. the control method of display device as claimed in claim 7, which is characterized in that described to be connect according to the transmission port The signal of receipts, judges whether this display device interconnects with other mating display devices, is specially:
In this display device starting-up, timing is performed;
Detect whether the transmission port receives n times interconnection signal in first time threshold value;If so, determine that this display is set It is standby to be interconnected with other mating display devices;If not, it is determined that this display device does not interconnect with other mating display devices;Its In, N >=1.
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