CN108873746B - Display device and control method thereof - Google Patents
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- CN108873746B CN108873746B CN201810611058.8A CN201810611058A CN108873746B CN 108873746 B CN108873746 B CN 108873746B CN 201810611058 A CN201810611058 A CN 201810611058A CN 108873746 B CN108873746 B CN 108873746B
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- 230000008054 signal transmission Effects 0.000 claims description 5
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/14—Display of multiple viewports
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Abstract
The invention discloses a display device, comprising: the first memory is used for storing programs required in a single-screen working state; the second memory is used for storing programs required in a multi-screen working state; the transmission port is used for receiving signals sent by other matched display equipment; the controller is used for judging whether the display equipment is interconnected with other matched display equipment or not according to the signal received by the transmission port; if yes, closing the first memory, and opening the second memory, so that the display equipment and other matched display equipment are interconnected to form multi-screen equipment and are in a multi-screen working state; if not, the first memory is started, and the second memory is closed, so that the display device works independently as a single-screen device and is in a single-screen working state. The invention also discloses a control method of the display equipment. By implementing the invention, the display equipment can work independently and can form multi-screen equipment with other matched display equipment, and the two working states are not interfered with each other and can run normally.
Description
The application is a display device with application number 201610109114.9, application date 2016, 2 and 26 months and invention name
And a divisional application of a control method of a display device.
Technical Field
The invention relates to the technical field of computers, in particular to a display device and a control method of the display device.
Background
Early computer systems consisted primarily of three parts: along with the development of display technology, particularly Liquid Crystal Display (LCD) eliminates a picture tube, computer manufacturers begin to integrate a host into a display, and display equipment with computer functions such as a computer all-in-one machine, an intelligent television, an intelligent interactive panel and the like in the prior art gradually appear; the display equipment integrates multiple technologies such as human-computer interaction, panel display, multimedia information processing, network transmission and the like, and is a preferred solution for interactive demonstration such as commercial display, office, teaching and the like in the information era. In recent years, large-screen image display formed by splicing a plurality of display devices is more widely applied, the work efficiency in the fields of monitoring, security protection, conferences and the like is greatly improved due to the super-large picture, multi-screen display and clear and vivid display effect brought by the large-screen image display, and the rapid progress of the technical level of the industries is promoted.
A common spliced large screen, namely a multi-screen device, is formed by fixedly connecting two or more display devices together in the design process, and is often difficult to carry due to large size; in practical application, the use frequency of the spliced large screen is not high, for example, when the spliced large screen is applied to a conference room, the resources are idle when no conference exists. Therefore, the display devices are not fixedly connected in the design and production process, the display devices are spliced when in use, and the program interconnection of the display devices is realized through the bidirectional communication connecting line, so that each display device can be transported independently, and the difficulty in the transportation process is reduced. However, if such a display device can only be used in a spliced and interconnected manner, it cannot be used as a single complete machine, which is also a waste of resources. When the display devices are connected and interconnected to work, a plurality of working modes are provided (for example, a plurality of display devices can select screen expansion or copy display), so that when the display devices are connected and work, the operation elements such as an operating system, application software, a User Interface (UI) and the like are different from those when the display devices are independently used as a whole machine to work, and the operation elements are stored in a memory in a program form and correspond to storage addresses; therefore, if the memory in the display device is provided with the program for use when they are interconnected, it cannot be used as a single whole device, and if the memory is provided with the program for use when they are individually used as a whole device, it may work abnormally when they are interconnected. In the prior art, a display device which can be combined with other matched display devices to be used as a spliced large screen and can work independently and normally operates and a control method supporting the display device do not exist.
Disclosure of Invention
The invention aims to provide a display device which can be combined with other matched display devices to be used as a multi-screen device and can work independently, two working states of the display device are not interfered with each other, and the display device can run normally, so that the problems of difficulty in carrying, idle resource waste and the like of the multi-screen device in the prior art are solved.
In order to achieve the above object, the present invention provides a display device comprising:
the first memory is used for storing programs required in a single-screen working state;
the second memory is used for storing programs required in a multi-screen working state;
the transmission port is used for receiving signals sent by other matched display equipment;
the controller is used for judging whether the display equipment is interconnected with other matched display equipment or not according to the signal received by the transmission port; if yes, closing the first memory, and opening the second memory, so that the display equipment and other matched display equipment are interconnected to form multi-screen equipment and are in a multi-screen working state; if not, the first memory is started, the second memory is closed, and the display device works independently as a single-screen device and is in a single-screen working state.
Further, the controller is configured to determine whether the display device is interconnected with other display devices that are associated with the display device according to the signal received by the transmission port, specifically:
when the display equipment is started, timing is executed;
detecting whether the transmission port receives N times of interconnection signals within a first time threshold; if yes, determining that the display equipment is interconnected with other matched display equipment; if not, determining that the display equipment is not interconnected with other matched display equipment; wherein N is more than or equal to 1.
Further, the transmission port is also used for sending interconnection signals to other matched display devices when the display device is started.
In one embodiment, a first chip select port is configured on the first memory, and a second chip select port is configured on the second memory;
the controller starts the first memory by sending a valid first chip select signal to the first chip select port; the controller shuts down the first memory by sending an invalid first chip select signal to the first chip select port;
the controller starts the second memory by sending a valid second chip select signal to the second chip select port; the controller shuts down the second memory by sending an inactive second chip select signal to the second chip select port.
In one embodiment, the display device further includes:
a first switching circuit for turning on or off a power supply of the first memory;
a second switching circuit for turning on or off a power supply of the second memory;
the controller sends a valid first enabling signal to the first switch circuit so that the first switch circuit conducts the power supply of the first memory and the first memory is started; the controller turns off the first memory by sending an inactive first enable signal to the first switch circuit to cause the first switch circuit to turn off the power of the first memory;
the controller sends a valid second enable signal to the second switch circuit to enable the second switch circuit to conduct the power supply of the second memory and start the second memory; the controller turns off the second memory by sending an inactive second enable signal to the second switch circuit to cause the second switch circuit to turn off the power of the second memory.
Further, the display apparatus further includes:
the third memory is used for storing programs required in the backup single-screen working state;
the fourth memory is used for storing programs required in the backup multi-screen working state;
the controller is further configured to, after determining that the display device is not interconnected with other display devices, turn on the third memory if it is detected within a second time threshold that the first memory cannot operate normally;
the controller is further configured to, after determining that the display device is interconnected with other display devices, turn on the fourth memory if it is detected within a second time threshold that the second memory cannot operate normally.
Preferably, the transmission port is a port supporting RS232 signal transmission.
Another aspect of the present invention is to provide a method for controlling a display device, so that the display device can be combined with other display devices to be used as a multi-screen device, and can also operate independently, and the two operating states are not interfered with each other and can operate normally.
In order to achieve the above object, the present invention provides a control method of a display device, comprising:
receiving signals sent by other matched display equipment through a transmission port;
judging whether the display equipment is interconnected with other matched display equipment or not according to the signal received by the transmission port; if so, closing a first memory in the display equipment, and opening a second memory in the display equipment, so that the display equipment and other matched display equipment are interconnected to form multi-screen equipment and are in a multi-screen working state; if not, the first memory is started, the second memory is closed, and the display device works independently as a single-screen device and is in a single-screen working state;
the first memory stores programs required by single-screen working states, and the second memory stores programs required by multi-screen working states.
Further, the control method of the display apparatus further includes:
after the display equipment is determined not to be interconnected with other matched display equipment, if the first memory is detected to be incapable of working normally within a second time threshold, a third memory is started;
after the display equipment is determined to be interconnected with other matched display equipment, if the second memory is detected to be incapable of working normally within a second time threshold, starting a fourth memory;
the third memory stores programs required by the backup single-screen working state, and the fourth memory stores programs required by the backup multi-screen working state.
Further, the determining, according to the signal received by the transmission port, whether the display device is interconnected with other display devices, specifically includes:
when the display equipment is started, timing is executed;
detecting whether the transmission port receives N times of interconnection signals within a first time threshold; if yes, determining that the display equipment is interconnected with other matched display equipment; if not, determining that the display equipment is not interconnected with other matched display equipment; wherein N is more than or equal to 1. .
The implementation of the invention has the following beneficial effects:
the display device and the control method of the display device provided by the embodiment of the invention are provided with two memories, and whether the display device is interconnected with other matched display devices is judged according to signals sent by other matched display devices and received by a transmission interface, and further, whether a first memory or a second memory is operated is judged; the two memories respectively store programs required in a single-screen working state and programs required in a multi-screen working state, namely an operating system, application software and a UI in the single-screen working state and the operating system, the application software and the UI in the multi-screen working state are respectively stored in the two memories and do not interfere with each other; therefore, the display equipment provided by the invention can be in a single-screen working state and independently and normally work; the multi-screen equipment can be in a multi-screen working state with other matched display equipment, and an interconnection program is operated; and the two working states are not interfered with each other and can run normally. The problems that in the prior art, multi-screen equipment is difficult to transport, resources are idle and wasted and the like are solved.
Drawings
Fig. 1 is a block diagram showing the structure of a display device according to the present invention;
fig. 2 is a schematic diagram of a first embodiment of a display device provided by the present invention;
FIG. 3 is a schematic diagram of a second embodiment of a display device provided by the present invention;
FIG. 4 is a schematic diagram of one implementation of a first switching circuit in a second embodiment of the present invention;
fig. 5 is a flowchart of a control method of a display device provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a block diagram illustrating a structure of a display apparatus according to the present invention, the display apparatus including:
the first memorizer 1, is used for storing the procedure needed under the working condition of single screen;
the second memory 2 is used for storing programs required in a multi-screen working state;
the transmission port 3 is used for receiving signals sent by other matched display equipment;
the controller 4 is used for judging whether the display equipment is interconnected with other matched display equipment or not according to the signals received by the transmission port 3; if yes, closing the first memory 1, and opening the second memory 2, so that the display device and other matched display devices are interconnected to form a multi-screen device, and the multi-screen device is in a multi-screen working state; if not, the first memory 1 is opened, and the second memory 2 is closed, so that the display device works independently as a single-screen device and is in a single-screen working state.
The controller 4 is configured to determine whether the display device is interconnected with other display devices in a supporting manner according to the signal received by the transmission port, specifically:
when the display equipment is started, timing is executed;
detecting whether the transmission port 3 receives N times of interconnection signals within a first time threshold; if yes, determining that the display equipment is interconnected with other matched display equipment; if not, determining that the display equipment is not interconnected with other matched display equipment; wherein N is more than or equal to 1.
Further, the transmission port 3 is also used for sending interconnection signals to other matched display devices when the display device is powered on.
The display device provided by the invention is provided with a first memory 1 and a second memory 2, wherein an operating system, application software, a UI (user interface) and the like in a single-screen working state are stored in the first memory 1 in the form of programs, and the operating system, the application software, the UI and the like in a multi-screen working state are stored in the second memory 2 in the form of programs;
when the display equipment is interconnected with other matched display equipment, the controller 4 executes timing after starting up, and the transmission port 3 for sending and receiving signals is arranged, so that if the other matched display equipment sends interconnection signals to the display equipment after starting up, the transmission port 3 can receive the interconnection signals, the controller 4 can detect that the transmission interface 3 receives the interconnection signals within a first time threshold value, determine that the display equipment is interconnected with the other matched display equipment, then close the first memory 1 and open the second memory 2, so that the display equipment and the other matched display equipment are interconnected to form multi-screen equipment and are in a multi-screen working state;
in order to improve the reliability of interconnection judgment, it may be configured that when receiving the interconnection signal for multiple times within the first time threshold, it is determined that the display device is interconnected with other matched display devices, that is, it is determined that the display device is interconnected with other matched display devices only when receiving the interconnection signal for N times within the first time threshold; when the controller executes timing after starting up, the display device also sends interconnection signals to other matched display devices through the transmission port 3 so as to ensure that the other matched display devices can also receive the interconnection signals and the other matched display devices are also in a multi-screen working state;
when the display device is not interconnected with other matched display devices, the controller 4 performs timing after the display device is started, and the interconnection signal cannot be received within the first time threshold, so that the controller 4 can determine that the display device is not interconnected with other matched display devices, then the first memory 1 is started, and the second memory 2 is closed, so that the display device can independently work as a single-screen device and is in a single-screen working state.
Referring to fig. 2, fig. 2 is a schematic diagram of a first embodiment of a display device provided by the present invention; in this embodiment, the transmission port 3 is a UART port, the first memory 1 is configured with a first chip select port 11, and the second memory 2 is configured with a second chip select port 21;
the controller 4 starts the first memory 1 by sending a valid first chip select signal to the first chip select port 11; turning off the first memory 1 by sending an inactive first chip select signal to the first chip select port 11; the second memory 2 is turned on by sending a valid second chip select signal to the second chip select port 21; the second memory 2 is switched off by sending an inactive second chip select signal to the second chip select port 21.
When the display device is determined to be in the single-screen working state or the multi-screen working state, the display device starts to work, the display device is provided with the central processing unit 7, in the working process, the central processing unit 7 of the display device sends an address to the address bus, the address bus is divided into two parts which are respectively connected with the first memory 1 and the second memory 2, only one memory reacts to the address sent by the central processing unit 7 due to the fact that only one memory is opened, and a program corresponding to the address is returned to the central processing unit 7.
When the central processing unit 7 detects the same user input information, the invoked program is different and the executed operation is different because the memories opened in the single-screen operating state and the multi-screen operating state are different, and the display device has rich information sharing functions in the multi-screen operating state. For example, when the user adjusts the volume through a remote controller, a keyboard, a touch screen, or the like, if the first memory 1 in the display device is turned on, the central processing unit 7 obtains a program returned by the first memory 1 and then executes the operation of only adjusting the volume of the display device; if the second memory 2 in the display device is opened, that is, in the multi-screen working state, the central processing unit 7 obtains the program returned by the second memory 2 and then executes the operation, which is not only the volume adjustment of the display device, but also transfers the information required to be adjusted in volume to other matched display devices for synchronous adjustment; under the working state of double screens, based on the program in the second memory 2, screen copying or expansion can be executed, namely, the display device and other matched display devices display the same image or expand and combine the same image into a screen display image; the display device may also cooperate with other display devices to implement channel switching, for example, when the current display device and a display device in cooperation extend to display an image, and when the user switches the channel of the current display device, the display device in cooperation alone displays the current image, and the display device may perform other operations of the user.
Further, the display device in this embodiment further includes:
a third memory 5 for storing programs required in the single-screen working state of the backup;
a fourth memory 6 for storing programs required in the backup multi-screen working state;
the controller 4 is further configured to, after determining that the display device is not interconnected with other display devices, turn on the third memory 5 if it is detected within a second time threshold that the first memory 1 cannot operate normally; the controller 4 is further configured to, after determining that the display device is interconnected with other display devices, turn on the fourth memory 6 if it is detected that the second memory 2 cannot operate normally within a second time threshold.
In this embodiment, when the display device is in the single-screen working state, and the first memory 1 is damaged and cannot respond to the address sent by the central processing unit 7, the controller 4 detects that the first memory 1 cannot work normally within the second time threshold through being connected with the central processing unit 7, the third memory 5 is started, and the third memory 5 returns the program required in the backup single-screen working state to the central processing unit, that is, the purpose that the backup program can run after the first memory 1 is damaged is achieved.
When the display device is in the multi-screen working state, and the second memory 2 is damaged and cannot respond to the address sent by the central processing unit, the controller 4 is connected with the central processing unit 7 to detect that the second memory 2 cannot work normally within the second time threshold, the fourth memory 6 is started, and the fourth memory 6 returns the program required in the backup multi-screen working state to the central processing unit, namely, the purpose that the backup program can run after the second memory 2 is damaged is achieved.
Further, if the program in the memory needs to be upgraded, for example, the first memory 1 needs to be upgraded through an external storage medium, the central processing unit 7 reads the program in the storage medium to upgrade the program 1 of the first memory in the single-screen working state, and after the upgrade is finished, the controller 4 closes the first memory 1, opens the third memory 5, and the central processing unit 7 upgrades the backup program. The upgrading principle of the second memory 2 is similar to that of the first memory and will not be described in detail here.
Referring to fig. 3, fig. 3 is a schematic diagram of a second embodiment of a display device provided by the present invention; the present embodiment differs from the above embodiments in that: the transmission port 3 is a port supporting RS232 signal transmission, for example, the transmission port 3 may be an RS232 port, and may also be a port supporting RS232 signal transmission formed by a UART-to-RS 232 circuit 10 through a UART port; when the distance between the controller 4 of the display device and the controllers of other matched display devices exceeds 10cm due to the large size of the display device or the position arrangement of the controller and the like, the reliability of remote transmission can be ensured by adopting RS232 signal transmission;
in addition, in this embodiment, the display device further includes:
a first switch circuit 8 for turning on or off a power supply of the first memory;
a second switch circuit 9 for turning on or off a power supply of the second memory;
the controller 4 sends a valid first enable signal to the first switch circuit 8, so that the first switch circuit 8 turns on the power VCC of the first memory 1, and the first memory 1 is turned on; the controller 4 turns off the first memory 1 by sending an inactive first enable signal to the first switch circuit 8 to cause the first switch circuit 8 to turn off the power of the first memory 1;
the controller 4 sends a valid second enable signal to the second switch circuit 9, so that the second switch circuit 9 turns on the power VCC of the second memory 2, and turns on the second memory 2; the controller 4 sends an invalid second enable signal to the second switch circuit 9, so that the second switch circuit 9 turns off the power VCC of the second memory 2, and turns off the second memory 2.
Referring to fig. 4, fig. 4 is a schematic diagram of one implementation of a first switching circuit in a second embodiment of the present invention; the first switch circuit 8 includes an enable terminal EN, an output terminal OUT, a power connection terminal, a field effect transistor Q1, a transistor Q2, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, and a second capacitor C2. Specifically, the enable terminal EN is used for connecting the controller 4, the output terminal OUT is used for connecting the first memory 1, and the power connection terminal is used for connecting the power supply VCC; the power supply connecting end is connected with the first end of the first resistor R1, the enable end EN is connected with the first end of the third resistor, the second end of the third resistor is connected with the base electrode of the triode Q2, the emitting electrode of the triode Q2 is grounded, the collecting electrode is connected with the second end of the first resistor R1, the collecting electrode of the triode Q2 is also connected with the first end of the second resistor R2, the second end of the second resistor R2 is connected with the grid electrode of the field-effect transistor Q1, the source electrode of the field-effect transistor Q1 is connected with the power supply connecting end, and the drain electrode of the field-effect transistor is;
in this embodiment, the effective first enable signal is a high-level signal, when the controller 4 sends the effective first enable signal to the first switch circuit 8, even if the enable terminal EN is a high level, the transistor Q2 is turned on, at this time, the gate of the fet Q2 is grounded through the second resistor R2, the source is connected to the power source VCC, and the voltage drop between the source and the gate is large, so that the fet Q1 is turned on, and the first memory 1 is powered on, thereby turning on the first memory 1; when the inactive first enable signal is at a low level and the enable terminal EN is at a low level, the transistor Q2 is turned off, the gate of the fet Q2 is connected to the power VCC through the second resistor R2 and the first resistor R1, the source is connected to the power VCC, and the voltage drop between the source and the gate is small, so that the fet Q1 and the first memory 1 are not powered, and thus the first memory 1 is turned off. The circuit structure of the second switch circuit 9 is the same as that of the first switch circuit 8, and is not described in detail herein.
Referring to fig. 5, fig. 5 is a flowchart of a control method of a display apparatus provided by the present invention; the control method of the display device includes:
s1, receiving signals sent by other matched display equipment through a transmission port;
s2, judging whether the display equipment is interconnected with other matched display equipment according to the signal received by the transmission port;
s3, if yes, closing the first memory in the display device, and opening the second memory in the display device, so that the display device and other matched display devices are interconnected to form a multi-screen device, and the multi-screen device is in a multi-screen working state;
s4, if not, the first memory is opened, the second memory is closed, and the display device works independently as a single-screen device and is in a single-screen working state;
the first memory stores programs required by single-screen working states, and the second memory stores programs required by multi-screen working states. The display device is the display device provided by the above embodiment.
In a specific implementation, step S2 may include:
when the display equipment is started, timing is executed;
detecting whether the transmission port receives N times of interconnection signals within a first time threshold; if yes, determining that the display equipment is interconnected with other matched display equipment; if not, determining that the display equipment is not interconnected with other matched display equipment; wherein N is more than or equal to 1.
By using the control method of the display equipment, the controller in the display equipment judges whether the display equipment is interconnected with other matched display equipment according to the signals received by the transmission port, and determines which memory is used according to the judgment result, so that the display equipment can use a special memory in any working state, and the problems of mutual interference and abnormal work of the two working states are avoided.
Specifically, the control method of the display device further includes:
after the display equipment is determined not to be interconnected with other matched display equipment, if the first memory is detected to be incapable of working normally within a second time threshold, a third memory is started;
after the display equipment is determined to be interconnected with other matched display equipment, if the second memory is detected to be incapable of working normally within a second time threshold, starting a fourth memory;
the third memory stores programs required by the backup single-screen working state, and the fourth memory stores programs required by the backup multi-screen working state.
The display device provided with the third memory and the fourth memory can realize that the backup program can run when the first memory or the second memory is damaged by using the display control method, thereby improving the running reliability of the display device.
The display equipment and the control method of the display equipment provided by the embodiment of the invention are provided with two memories, and the display equipment is judged whether to be interconnected with other matched display equipment or not according to signals sent by other matched display equipment and received by a transmission interface, so that whether a first memory or a second memory is operated is judged; because the two memories respectively store the programs required in the single-screen working state and the programs required in the multi-screen working state, the display equipment provided by the invention can be in the single-screen working state and independently and normally work; the multi-screen equipment can be formed into a multi-screen working state with other matched display equipment, and an interconnection program is operated; and the two working states are not interfered with each other and can run normally. The problems that in the prior art, multi-screen equipment is difficult to transport, resources are idle and wasted and the like are solved.
The foregoing is directed to the preferred embodiment of the present invention, and it is understood that various changes and modifications may be made by one skilled in the art without departing from the spirit of the invention, and it is intended that such changes and modifications be considered as within the scope of the invention.
Claims (10)
1. A display device, comprising:
the first memory is used for storing programs required in a single-screen working state;
the second memory is used for storing programs required in a multi-screen working state;
the transmission port is used for receiving signals sent by other matched display equipment;
the controller is used for judging whether the display equipment is interconnected with other matched display equipment or not according to the signal received by the transmission port; if yes, closing the first memory, and opening the second memory, so that the display equipment and other matched display equipment are interconnected to form multi-screen equipment and are in a multi-screen working state; if not, the first memory is started, the second memory is closed, and the display device works independently as a single-screen device and is in a single-screen working state.
2. The display device according to claim 1, wherein the controller is configured to determine whether the display device is interconnected with other display devices according to the signal received by the transmission port, specifically:
when the display equipment is started, timing is executed;
detecting whether the transmission port receives N times of interconnection signals within a first time threshold; if yes, determining that the display equipment is interconnected with other matched display equipment; if not, determining that the display equipment is not interconnected with other matched display equipment; wherein N is more than or equal to 1.
3. The display device of claim 2, wherein the transmission port is further configured to send an interconnect signal to other mated display devices when the display device is powered on.
4. The display device according to any one of claims 1 to 3, wherein a first chip select port is configured on the first memory, and a second chip select port is configured on the second memory;
the controller starts the first memory by sending a valid first chip select signal to the first chip select port; the controller shuts down the first memory by sending an invalid first chip select signal to the first chip select port;
the controller starts the second memory by sending a valid second chip select signal to the second chip select port; the controller shuts down the second memory by sending an inactive second chip select signal to the second chip select port.
5. The display device according to any one of claims 1 to 3, characterized in that the display device further comprises:
a first switching circuit for turning on or off a power supply of the first memory;
a second switching circuit for turning on or off a power supply of the second memory;
the controller sends a valid first enabling signal to the first switch circuit so that the first switch circuit conducts the power supply of the first memory and the first memory is started; the controller turns off the first memory by sending an inactive first enable signal to the first switch circuit to cause the first switch circuit to turn off the power of the first memory;
the controller sends a valid second enable signal to the second switch circuit to enable the second switch circuit to conduct the power supply of the second memory and start the second memory; the controller turns off the second memory by sending an inactive second enable signal to the second switch circuit to cause the second switch circuit to turn off the power of the second memory.
6. The display device according to any one of claims 1 to 3, characterized in that the display device further comprises:
the third memory is used for storing programs required in the backup single-screen working state;
the fourth memory is used for storing programs required in the backup multi-screen working state;
the controller is further configured to, after determining that the display device is not interconnected with other display devices, turn on the third memory if it is detected within a second time threshold that the first memory cannot operate normally;
the controller is further configured to, after determining that the display device is interconnected with other supporting display devices, if it is detected within a second time threshold that the second memory cannot normally operate, start the fourth memory;
the display device further comprises a central processor; the central processing unit is used for sending an address to an address bus, and sending the address to the first memory and the second memory which are connected with the address bus through the address bus, so that the started first memory or the started second memory reacts to the address and returns a program corresponding to the address.
7. The display device according to any one of claims 1 to 3, wherein the transmission port is a port supporting RS232 signal transmission.
8. A control method of a display device, characterized by comprising:
receiving signals sent by other matched display equipment through a transmission port;
judging whether the display equipment is interconnected with other matched display equipment or not according to the signal received by the transmission port; if so, closing a first memory in the display equipment, and opening a second memory in the display equipment, so that the display equipment and other matched display equipment are interconnected to form multi-screen equipment and are in a multi-screen working state; if not, the first memory is started, the second memory is closed, and the display device works independently as a single-screen device and is in a single-screen working state;
the first memory stores programs required by single-screen working states, and the second memory stores programs required by multi-screen working states.
9. The control method of a display device according to claim 8, further comprising:
after the display equipment is determined not to be interconnected with other matched display equipment, if the first memory is detected to be incapable of working normally within a second time threshold, a third memory is started;
after the display equipment is determined to be interconnected with other matched display equipment, if the second memory is detected to be incapable of working normally within a second time threshold, starting a fourth memory;
the third memory stores programs required by the backup single-screen working state, and the fourth memory stores programs required by the backup multi-screen working state;
the display device comprises a central processor; the central processing unit is used for sending an address to an address bus, and sending the address to the first memory and the second memory which are connected with the address bus through the address bus, so that the started first memory or the started second memory reacts to the address and returns a program corresponding to the address.
10. The method for controlling a display device according to claim 8 or 9, wherein the determining whether the display device is interconnected with other display devices according to the signal received by the transmission port includes:
when the display equipment is started, timing is executed;
detecting whether the transmission port receives N times of interconnection signals within a first time threshold; if yes, determining that the display equipment is interconnected with other matched display equipment; if not, determining that the display equipment is not interconnected with other matched display equipment; wherein N is more than or equal to 1.
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| CN201810611058.8A CN108873746B (en) | 2016-02-26 | 2016-02-26 | Display device and control method thereof |
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| CN201810611058.8A CN108873746B (en) | 2016-02-26 | 2016-02-26 | Display device and control method thereof |
| CN201610109114.9A CN105676700B (en) | 2016-02-26 | 2016-02-26 | Display device and control method thereof |
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| CN108873746B (en) * | 2016-02-26 | 2021-05-25 | 广州视睿电子科技有限公司 | Display device and control method thereof |
| CN111813457A (en) * | 2020-07-20 | 2020-10-23 | 四川长虹电器股份有限公司 | Device and method for timing startup and shutdown of multi-screen advertising machine |
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| CN105676700B (en) | 2018-05-22 |
| WO2017143862A1 (en) | 2017-08-31 |
| CN108873746A (en) | 2018-11-23 |
| CN105676700A (en) | 2016-06-15 |
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