CN113590068A - All-in-one machine display switching method and device and all-in-one machine - Google Patents
All-in-one machine display switching method and device and all-in-one machine Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels
Abstract
The invention provides an all-in-one machine display switching method, a device and an all-in-one machine; the method comprises the following steps: selectively acquiring an output signal of a display card of the all-in-one machine through a preset VGA switching circuit and forwarding the output signal to a VGA interface of the all-in-one machine, or receiving an external input signal through the VGA interface and forwarding the external input signal; selectively receiving an external input signal forwarded by the VGA switching circuit and an output signal of a display card of the all-in-one machine through a preset OSD circuit, and forwarding the external input signal and the output signal to a display of the all-in-one machine; and controlling the working states of the VGA switching circuit and the OSD circuit to display and switch. The beneficial effects of the invention include: the invention can enable the all-in-one machine to realize video signal output by the same VGA interface so as to realize double-screen display or receive external video signals, so that the all-in-one machine can be used as a display terminal.
Description
Technical Field
The invention relates to the field of computers, in particular to an all-in-one machine display switching method and device and an all-in-one machine.
Background
With the development of computer technology, the application forms of computers are also diversified, and in recent years, the market share of the computer in the form of an all-in-one machine is higher and higher due to the advantages of neat appearance, small occupied space and the like. The all-in-one computer is a product combining a computer host and a display, and connecting cables between the host and the display are omitted. However, the design lacks flexibility in use, and a video interface of a common all-in-one computer on the market can only output signals of an internal host, so that the all-in-one computer cannot be used as an external display. Or the video interface only supports input of external signals, and the design can use the all-in-one machine as an external display, but sacrifices the function of double-screen display.
Disclosure of Invention
In order to solve the technical problem, in an aspect of the present invention, an all-in-one machine display switching method is provided, where the method includes: selectively acquiring an output signal of a display card of the all-in-one machine through a preset VGA switching circuit and forwarding the output signal to a VGA interface of the all-in-one machine, or receiving an external input signal through the VGA interface and forwarding the external input signal; selectively receiving an external input signal forwarded by the VGA switching circuit and an output signal of a display card of the all-in-one machine through a preset OSD circuit, and forwarding the external input signal and the output signal to a display of the all-in-one machine; and controlling the working states of the VGA switching circuit and the OSD circuit to display and switch.
In one or more embodiments, the controlling the working states of the VGA switching circuit and the OSD circuit to perform display switching includes: controlling the VGA switching circuit to acquire an output signal of a display card of the all-in-one machine and sending the output signal to a VGA interface of the all-in-one machine; and controlling the OSD circuit to acquire an output signal of the display card of the all-in-one machine and forwarding the output signal to a display of the all-in-one machine so as to control the all-in-one machine to work in a double-screen display mode.
In one or more embodiments, the controlling the working states of the VGA switching circuit and the OSD circuit to perform display switching includes: controlling the VGA interface to receive and forward an external input signal; and controlling the OSD circuit to receive the external input signal forwarded by the VGA switching circuit and forwarding the external input signal to a display of the all-in-one machine so as to control the all-in-one machine to work in a display mode.
In one or more embodiments, the all-in-one machine display switching method further includes: responding to the shutdown of the all-in-one machine, and controlling the all-in-one machine to automatically enter the display mode; and in response to the fact that no external input signal is received within a preset first time threshold value, the OSD circuit controls to close the display of the all-in-one machine.
In one or more embodiments, the VGA switching circuit and the OSD circuit are both powered by independent power supplies.
In one or more embodiments, the all-in-one machine display switching method further includes: in response to the input request of the external input signal and the input request of the output signal of the display card, the OSD circuit preferentially receives the external input signal and forwards the external input signal to the display of the all-in-one machine.
In one or more embodiments, the all-in-one machine display switching method further includes: and in response to the fact that no external input signal is received within a preset second time threshold, receiving an output signal from the display card and forwarding the output signal to a display of the all-in-one machine.
In one or more embodiments, the all-in-one machine display switching method further includes: the OSD circuit converts an input signal, and converts an external input signal from the VGA interface and an output signal from the display card into an LVDS signal to be displayed in a display of the all-in-one machine; the external input signal is a VGA signal, and the output signal of the display card is a DVI signal.
In another aspect of the present invention, an all-in-one machine display switching apparatus is provided, including: the VGA switching circuit is respectively connected with the video card and the VGA interface of the all-in-one machine, and is configured for selectively acquiring an output signal of the video card of the all-in-one machine and forwarding the output signal to the VGA interface of the all-in-one machine, or receiving and forwarding an external input signal through the VGA interface; and the OSD circuit is respectively connected with the VGA switching circuit, the display card of the all-in-one machine and the display of the all-in-one machine, is configured to selectively receive the external input signal forwarded by the VGA switching circuit and the output signal of the display card of the all-in-one machine and forwards the external input signal and the output signal to the display of the all-in-one machine.
In another aspect of the invention, a kiosk is provided, which includes the kiosk display switching device as described above.
The beneficial effects of the invention include: the invention can enable the all-in-one machine to realize video signal output by the same VGA interface so as to realize double-screen display or receive external video signals, so that the all-in-one machine can be used as a display terminal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by using the drawings without creative efforts.
FIG. 1 is a flowchart of the operation of the display switching method of the all-in-one machine of the present invention;
fig. 2 is a schematic structural diagram of the all-in-one machine of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
Fig. 1 is a flowchart of the operation of the display switching method of the all-in-one machine of the present invention. As shown in fig. 1, the work flow of the display switching method of the all-in-one machine of the present invention includes: s1, selectively acquiring an output signal of the display card of the all-in-one machine through a preset VGA switching circuit and forwarding the output signal to a VGA interface of the all-in-one machine, or receiving an external input signal through the VGA interface and forwarding the external input signal; step S2, selectively receiving the external input signal forwarded by the VGA switching circuit and the output signal of the display card of the all-in-one machine through a preset OSD circuit, and forwarding the external input signal and the output signal to the display of the all-in-one machine; and step S3, controlling the working state of the VGA switching circuit and the OSD circuit to switch the display.
In this embodiment, the VGA switching circuit and the OSD circuit are respectively used for controlling signal gating and signal transmission direction, so as to control the all-in-one machine to work in different modes.
In a further embodiment, the step S2 of controlling the working states of the VGA switching circuit and the OSD circuit to perform display switching includes: controlling the VGA switching circuit to acquire an output signal of a display card of the all-in-one machine and sending the output signal to a VGA interface of the all-in-one machine; and controlling an OSD circuit to obtain an output signal of a display card of the all-in-one machine and transmitting the output signal to a display of the all-in-one machine so as to control the all-in-one machine to work in a double-screen display mode.
In this implementation, the VGA switching circuit and the OSD circuit are controlled to gate the graphics card (i.e., to obtain the output signal of the graphics card), and the output signal of the graphics card is respectively forwarded to the VGA interface and the display of the all-in-one machine, so that the all-in-one machine works in the dual-screen display mode. In the dual-screen display mode, when the external display device is connected with the VGA interface of the all-in-one machine, the same content as the display of the all-in-one machine can be synchronously displayed in the external display.
In a further embodiment, the step S2 of controlling the working states of the VGA switching circuit and the OSD circuit to perform display switching includes: controlling the VGA interface to receive and forward an external input signal; and the OSD circuit is controlled to receive the external input signal forwarded by the VGA switching circuit and forward the external input signal to the display of the all-in-one machine so as to control the all-in-one machine to work in a display mode.
In this embodiment, the VGA interface is gated by controlling the VGA switching circuit (that is, the external input signal is obtained by the VGA interface), the external input signal from the VGA interface is obtained by controlling the OSD circuit to gate the VGA switching circuit, and then the external input signal is forwarded to the display of the all-in-one machine, so that the all-in-one machine works in the display mode. In the display mode, the all-in-one machine can acquire an external input signal through the VGA interface and display the external input signal on the display.
When the integrated machine works in a display mode, only a display is needed; therefore, in a preferred embodiment, the time for the all-in-one machine to enter the display mode is configured to respond to the shutdown of the all-in-one machine and control the all-in-one machine to automatically enter the display mode; and in response to the fact that no external input signal is received within a preset first time threshold value, the display of the all-in-one machine is controlled to be closed through an OSD circuit. It should be noted that in this embodiment, in order to ensure that the display can still work normally after the all-in-one machine is turned off, the power-off control of each hardware module of the all-in-one machine needs to be redesigned, specifically, a delay time needs to be set for the power-off of the display, and if an external input signal from the VGA interface is not received within the delay time, the display of the all-in-one machine is controlled to be turned off by the OSD circuit; and if the external input signal from the VGA interface is received within the delay time, the power supply to the display is kept, and the display displays the external input signal.
In the implementation, the display mode is controlled to be entered when the all-in-one machine is shut down, and the power supply to the display of the all-in-one machine is temporarily reserved, so that the energy consumption of other hardware of the all-in-one machine can be reduced, and the energy is saved.
In a further embodiment, in order to ensure the stability of the operation of the VGA switching circuit and the OSD circuit, the present invention separately supplies power to the VGA switching circuit and the OSD circuit in an independent power supply manner. In an optional embodiment, the signal gating of the VGA switching circuit and the OSD circuit in each of the above embodiments is implemented by manual control of a corresponding control key.
In a preferred embodiment, the signal gating of the VGA switching circuit and the OSD circuit in the above embodiments can be designed to be automatically implemented. Specifically, for the VGA switching circuit, in response to the detection that the VGA interface has an input request, the VGA interface is controlled to work in an input mode, otherwise, the VGA interface is controlled to work in an output mode; for the OSD circuit, the priority of an external input signal is configured in advance to be higher than the priority of an output signal of the display card; in response to the input request of the external input signal and the input request of the output signal of the display card, the OSD circuit preferentially receives the external input signal and forwards the external input signal to the display of the all-in-one machine; and in response to the fact that the external input signal is not received within the preset second time threshold, receiving the output signal from the display card and forwarding the output signal to the display of the all-in-one machine.
In a further embodiment, since the display of the all-in-one machine cannot directly display the VGA signal from the VGA interface or the DVI signal from the display card, the method of the present invention further includes converting the external input signal by the OSD circuit, converting the external input signal from the VGA interface and the output signal from the display card into the LVDS signal to be displayed in the display of the all-in-one machine; the external input signal is a VGA signal, and the output signal of the display card is a DVI signal.
On the basis of the above embodiments, the present invention further provides an all-in-one machine display switching apparatus, including: VGA switching circuit and OSD circuit; the VGA switching circuit is respectively connected with the display card and the VGA interface of the all-in-one machine, and is configured for selectively acquiring an output signal of the display card of the all-in-one machine and forwarding the output signal to the VGA interface of the all-in-one machine, or receiving and forwarding an external input signal through the VGA interface; the OSD circuit is respectively connected with the VGA switching circuit, the display card of the all-in-one machine and the display of the all-in-one machine, is configured for selectively receiving the external input signal forwarded by the VGA switching circuit and the output signal of the display card of the all-in-one machine and forwards the external input signal and the output signal to the display of the all-in-one machine.
In one embodiment, the VGA switching circuit comprises a multi-channel controller configured to expand signal channels; the CPLD is configured to control the selection of signal channels; and the diode is arranged at the power supply end of the VGA switching circuit and is used for preventing power supply from reversely flowing. The model of the multi-channel controller is MAX 4885.
In another embodiment, the OSD circuit includes an OSD chip configured to convert an input signal, convert an external input signal from the VGA interface and an output signal from the graphics card into an LVDS signal to be displayed in the display of the all-in-one machine; the external input signal is a VGA signal, and the output signal of the display card is a DVI signal; and the CPLD is configured to control switching of the switching mode; the conversion mode comprises converting VGA signals into LDVS signals and converting DVI signals into LDVS signals. The model of the OSD chip is NT 68658.
On the basis of the above embodiments, the invention also discloses an all-in-one machine, which comprises the all-in-one machine display switching device in the above embodiments.
Fig. 2 is a schematic structural diagram of the all-in-one machine of the present invention. As shown in fig. 2, the all-in-one machine in this embodiment includes: VGA switching circuit 1, OSD circuit 2, display card 3, CPU4, switching control and indication module 5, VGA interface 6, OSD control key 7 and all-in-one LCD screen 8. The VGA switching circuit 1 is respectively connected with the VGA interface 6, the display card 3, the OSD circuit 2 and the connection switching control and indication module 5; the OSD circuit is also connected with an OSD control key 7 and an all-in-one machine liquid crystal screen 8; the graphics card 3 is connected to the CPU 4. The working process of the all-in-one machine comprises the following steps:
1) the working mode of the VGA switching circuit is controlled by the switching control and indication module 5, and comprises the following working modes: mode 1: the VGA output of the display card 3 is connected with an external VGA interface 6, and the VGA interface works in an output mode in the mode, can be connected with a display, a television, a projector and other equipment, and realizes double-screen display; mode 2: the OSD circuit 2 and the external VGA interface 6 are connected, the VGA interface works in an input mode in the mode, and can be connected with video signal output interfaces of equipment such as a notebook computer, a desktop computer and the like, so that the all-in-one machine can be used as a display of other computers. Wherein, the switching state of the control key is indicated through the indicator light.
2) The working mode of the OSD circuit is controlled by the control key 7, and the working mode comprises the following steps: mode 1: and receiving DVI signals generated by the display card of the all-in-one machine, converting the DVI signals into LVDS signals and displaying the LVDS signals on the liquid crystal screen of the all-in-one machine. Mode 2: and receiving the VGA signal input from the VGA interface, converting the VGA signal into the LVDS signal and displaying the LVDS signal on the liquid crystal screen of the all-in-one machine. And the OSD switching can be judged by the liquid crystal screen of the observation all-in-one machine, so that an indicator lamp is not required to be set.
3) The VGA switching circuit and the OSD circuit are controlled to work in different mode combinations, and then display switching can be achieved. Under the different mode combinations, the operating condition of all-in-one includes:
(1) in a common mode, the all-in-one machine is started, the VGA interface is not connected with any equipment, the OSD circuit works in a mode 1 at the moment, and the liquid crystal screen displays a video signal output by a mainboard of the all-in-one machine.
(2) And in a double-screen display mode, the all-in-one machine is started, and a user needs to establish double-screen display. The VGA switching circuit is controlled to work in the mode 1, the OSD circuit works in the mode 1, and the VGA interface can be connected with a display, a television, a projector and other equipment to realize double-screen display.
(3) And in the display mode, the all-in-one machine can be used as a common display when the all-in-one machine is turned off. The VGA switching circuit is controlled to work in a mode 2, the OSD circuit works in the mode 2, and the switching is automatically carried out when the device is turned off, so that the operation of a user is not needed. When no signal is input for a long time, the OSD circuit can turn off the power supply of the screen to save the electric energy.
(4) And in a display mode, the all-in-one machine is started, and a user needs to use the all-in-one machine as a common display temporarily. At the moment, the integrated machine does not need to be closed, and video signals (including VGA and DVI signals) input by the liquid crystal screen can be switched through the OSD configuration keys, so that the display of the integrated machine and the display of external equipment are switched. When the function of the display is switched, the VGA switching circuit works in a mode 2, the OSD circuit works in the mode 2, and the VGA signal input from the outside is displayed on the screen of the all-in-one machine at the moment. After the VGA input is unplugged or the user manually switches the VGA input through the OSD keys, the VGA input mode can be switched to a common mode, and the display of the local interface of the all-in-one machine is realized.
The embodiment shows that the all-in-one machine can realize video signal output by the same VGA interface so as to realize double-screen display or receive external video signals so that the all-in-one machine can be used as a display terminal.
The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the present disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
It should be understood that, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.
The numbers of the embodiments disclosed in the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of the embodiments of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. The display switching method of the all-in-one machine is characterized by comprising the following steps:
selectively acquiring an output signal of a display card of the all-in-one machine through a preset VGA switching circuit and forwarding the output signal to a VGA interface of the all-in-one machine, or receiving an external input signal through the VGA interface and forwarding the external input signal;
selectively receiving an external input signal forwarded by the VGA switching circuit and an output signal of a display card of the all-in-one machine through a preset OSD circuit, and forwarding the external input signal and the output signal to a display of the all-in-one machine;
and controlling the working states of the VGA switching circuit and the OSD circuit to display and switch.
2. The display switching method of the all-in-one machine of claim 1, wherein the controlling the working states of the VGA switching circuit and the OSD circuit to perform display switching comprises:
controlling the VGA switching circuit to acquire an output signal of a display card of the all-in-one machine and sending the output signal to a VGA interface of the all-in-one machine; and are
And controlling the OSD circuit to acquire an output signal of the display card of the all-in-one machine and forwarding the output signal to a display of the all-in-one machine so as to control the all-in-one machine to work in a double-screen display mode.
3. The display switching method of the all-in-one machine of claim 1, wherein the step of controlling the working states of the VGA switching circuit and the OSD circuit to perform display switching comprises the steps of:
controlling the VGA interface to receive and forward an external input signal; and are
And controlling the OSD circuit to receive the external input signal forwarded by the VGA switching circuit and forwarding the external input signal to a display of the all-in-one machine so as to control the all-in-one machine to work in a display mode.
4. The display switching method of the all-in-one machine of claim 3, wherein the method further comprises:
responding to the shutdown of the all-in-one machine, and controlling the all-in-one machine to automatically enter the display mode; and
and in response to the fact that no external input signal is received within a preset first time threshold value, the OSD circuit controls to close the display of the all-in-one machine.
5. The all-in-one machine display switching method according to claim 4, wherein the VGA switching circuit and the OSD circuit both adopt independent power supply modes for supplying power.
6. The display switching method of the all-in-one machine according to claim 1, wherein the method further comprises:
in response to the input request of the external input signal and the input request of the output signal of the display card, the OSD circuit preferentially receives the external input signal and forwards the external input signal to the display of the all-in-one machine.
7. The display switching method of the all-in-one machine of claim 6, wherein the method further comprises:
and in response to the fact that no external input signal is received within a preset second time threshold, receiving an output signal from the display card and forwarding the output signal to a display of the all-in-one machine.
8. The display switching method of the all-in-one machine of claim 6, wherein the method further comprises:
the OSD circuit converts an input signal, and converts an external input signal from the VGA interface and an output signal from the display card into an LVDS signal to be displayed in a display of the all-in-one machine; the external input signal is a VGA signal, and the output signal of the display card is a DVI signal.
9. All-in-one shows auto-change over device, its characterized in that includes:
the VGA switching circuit is respectively connected with the video card and the VGA interface of the all-in-one machine, and is configured for selectively acquiring an output signal of the video card of the all-in-one machine and forwarding the output signal to the VGA interface of the all-in-one machine, or receiving and forwarding an external input signal through the VGA interface;
and the OSD circuit is respectively connected with the VGA switching circuit, the display card of the all-in-one machine and the display of the all-in-one machine, is configured to selectively receive the external input signal forwarded by the VGA switching circuit and the output signal of the display card of the all-in-one machine and forwards the external input signal and the output signal to the display of the all-in-one machine.
10. An all-in-one machine, characterized in that the all-in-one machine comprises the all-in-one machine display switching device as claimed in claim 9.
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| CN208207667U (en) * | 2018-06-20 | 2018-12-07 | 山东超越数控电子股份有限公司 | A kind of all-in-one machine that the display can be used as other computers uses |
| CN112346689A (en) * | 2020-10-29 | 2021-02-09 | 浪潮电子信息产业股份有限公司 | Integrated machine |
| CN112487508A (en) * | 2020-11-30 | 2021-03-12 | 超越科技股份有限公司 | Domestic secret all-in-one that is involved that possesses mode switching function |
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