CN104360710B - The display circuit of external display port can be switched - Google Patents
The display circuit of external display port can be switched Download PDFInfo
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- CN104360710B CN104360710B CN201410564899.XA CN201410564899A CN104360710B CN 104360710 B CN104360710 B CN 104360710B CN 201410564899 A CN201410564899 A CN 201410564899A CN 104360710 B CN104360710 B CN 104360710B
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- display
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- switch
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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
- G06F3/1407—General aspects irrespective of display type, e.g. determination of decimal point position, display with fixed or driving decimal point, suppression of non-significant zeros
Abstract
The invention discloses a kind of display circuits that external display port can be switched, including：Plot and display chip, to generate plot and display signal；First BIOS and one the 2nd BIOS, is electrically connected in plot and display chip, and stores the first BIOS program and the second BIOS program respectively；BIOS switch is electrically connected at the first BIOS and the 2nd BIOS, another is closed together to enable the first BIOS and the 2nd BIOS, so that plot and display chip only loads the first BIOS program or the second BIOS program；Output switch is electrically connected at plot and display chip；First output port and second output terminal mouth, are electrically connected at plot and display chip through output switch respectively.When plot and display chip loads the first BIOS program, output switch switches the first output port and is electrically connected at plot and display chip；When plot and display chip loads the second BIOS program, output switch switching second output terminal mouth is electrically connected at plot and display chip.
Description
Technical field
The present invention relates to the output of drawing circuit more particularly to a kind of display circuits that external display port can be switched.
Background technology
As multimedia application, including audio-visual broadcasting, computer game execute and widely main frame used to execute, use
Family is also more and more diversified for the demand of main frame display port.The display adapter of general main frame is interior
Display circuit is built, only provides the fixed external display port of limited and specification for application.For example, general laptop is outer
Connecing display port, only there are one HDMI connectors and a VGA connectors；And existing high-end display adapter, also only it is equipped with outside two
Display port is connect, and has event and the combination of specification（Two HDMI or DVI add a DVI）.
Quantity limitation above-mentioned, essentially from the basic input output system of plot and display chip（GPU BIOS）, GBU
BIOS limits the quantity and specification of I/O.Under this limitation, manufacturer also can not arbitrarily increase external display port quantity,
Also the specification of external display port can not be arbitrarily changed, specification, but quantity can only be changed by the rewriting of GPU BIOS programs
Still limited（Quantity is limited to the I/O pin numbers of GPU simultaneously）.
Invention content
In view of this, the main purpose of the present invention is to provide a kind of display circuit that external display port can be switched, it can
According to the BIOS program of demand change plot and display chip load, and changing can corresponding output port.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of display circuit that external display port can be switched, including：One plot and display chip, it is aobvious to generate a drawing
Show signal；One the oneth BIOS is electrically connected at plot and display chip, and stores one first BIOS program；One the 2nd BIOS, electrically
It is connected to plot and display chip, and stores one second BIOS program；One BIOS switch, is electrically connected at the first BIOS and second
BIOS to enable one of the first BIOS and the 2nd BIOS and closes another, and using makes plot and display chip only load
One of one BIOS program and the second BIOS program；One output switch is electrically connected at plot and display chip；One first is defeated
Exit port is electrically connected at plot and display chip through output switch；And a second output terminal mouth, through output switch
It is electrically connected at plot and display chip.
Wherein, when plot and display chip loads the first BIOS program, then plot and display chip generation meets the first output end
The plot and display signal of mouth, and output switch switches the first output port and is electrically connected at plot and display chip, receives symbol
Close the plot and display signal of the first output port；When plot and display chip loads the second BIOS program, then plot and display chip produces
The raw plot and display signal for meeting second output terminal mouth, and output switch switching second output terminal mouth is electrically connected at drawing
Display chip receives the plot and display signal for meeting second output terminal mouth.
Wherein, the first output port and the display signal output port that second output terminal mouth is different size.
Wherein, BIOS switch and output switch are manual switching.
Wherein, the first output port may include a detecting pin, be electrically connected at BIOS switch and output switch,
Judge whether the first output port connects an external display, wherein：
When the first output port connect external display when, detecting pin output first switching signal to BIOS switch with
And output switch, it is enabled that BIOS switch, which switches the first BIOS, while output switch the first output port of switching is electrical
It is connected to plot and display chip；
When second output terminal mouth connect external display when, detecting pin output second switching signal to BIOS switch with
And output switch, it is enabled that BIOS switch, which switches the 2nd BIOS, while output switch switching second output terminal mouth is electrical
It is connected to plot and display chip.
The present invention proposes another display circuit that external display port can be switched, including：One plot and display chip, storage
One first BIOS program and one second BIOS program, and one of the first BIOS program or the second BIOS program are loaded, with
Generate a plot and display signal；One output switch is electrically connected at plot and display chip；One first output port, transmission are defeated
Go out switch and is electrically connected at plot and display chip；And a second output terminal mouth, it is electrically connected at and paints through output switch
Figure display chip.
Wherein, when plot and display chip loads the first BIOS program, then plot and display chip generation meets the first output end
The plot and display signal of mouth, and output switch switches the first output port and is electrically connected at plot and display chip, receives symbol
Close the plot and display signal of the first output port；When plot and display chip loads the second BIOS program, then plot and display chip produces
The raw plot and display signal for meeting second output terminal mouth, and output switch switching second output terminal mouth is electrically connected at drawing
Display chip receives the plot and display signal for meeting second output terminal mouth.
Wherein, the first output port and the display signal output port that second output terminal mouth is different size.
Wherein, output switch is manual switching.
Wherein, the first output port may include a detecting pin, be electrically connected at output switch, judge the first output end
Whether mouth connects an external display, wherein：
When the first output port connects external display, the first switching signal of detecting pin output to output switch,
Output switch switches the first output port and is electrically connected at plot and display chip；
When second output terminal mouth connects external display, the second switching signal of detecting pin output to output switch,
Output switch switching second output terminal mouth is electrically connected at plot and display chip.
The display circuit provided by the present invention that external display port can be switched, has the following advantages：
Display circuit through the invention, manufacturer can provide diversified, plurality of specifications display output port, pass through
The BIOS switchings loaded, so that it may to enable the required display output port of user, and be not only restricted to single BIOS and be made
At output port quantity limitation.Meanwhile by the detecting foot position of output port, switching above-mentioned can also become to cut automatically
It changes.
Description of the drawings
Fig. 1 is the circuit block diagram of first embodiment of the invention.
Fig. 2 to Fig. 3 is the operating diagram of first embodiment of the invention.
Fig. 4 is the circuit block diagram of second embodiment of the invention.
Fig. 5 to Fig. 6 is the operating diagram of second embodiment of the invention.
Fig. 7 is the circuit block diagram of third embodiment of the invention.
Fig. 8 to Fig. 9 is the operating diagram of third embodiment of the invention.
Figure 10 is the circuit block diagram of fourth embodiment of the invention.
Figure 11 is the circuit block diagram of present invention specific implementation aspect.
【Primary clustering symbol description】
100 display circuits
110 plot and display chips
120 first plot and display BIOS chips
130 second plot and display BIOS chips
140 BIOS chip switch
150 output switchs
160 first output ports
162 detecting foot positions
170 second output terminal mouths.
Specific implementation mode
Below in conjunction with the accompanying drawings and the embodiment of the present invention makees the display circuit that external display port can be switched of the utility model
Further details of explanation.
Refering to Figure 1, for a kind of display that external display port can be switched disclosed by first embodiment of the invention
Circuit 100, the display signal for being applied to a main frame export.The display circuit 100 can be applied to an independent display
The built-in display framework of adapter or aforementioned computer host.
As shown in Figure 1, the display circuit 100 includes a plot and display chip 110（GPU 110）, one first draw it is aobvious
Show BIOS chip 120（First BIOS 120）, one second plot and display BIOS chip 130
（2nd BIOS 130）, a BIOS chip switch 140（BIOS switch 140）, an output switch
150, one first output port 160 and a second output terminal mouth 170.
As shown in Figure 1, GPU 110 generates a plot and display according to this to receive the control signal from main frame
Signal.
First BIOS 120 and the 2nd BIOS 130 are electrically connected in GPU 110, meanwhile, the first BIOS 120 and
Two BIOS 130 store one first BIOS program and one second BIOS program respectively.
GPU 110 can load the first BIOS program or the second BIOS program, use and determine that it exports plot and display signal
Specification and the foot position for exporting plot and display signal, with corresponding first output port 160 or second output terminal mouth 170.
As previously mentioned, when GPU 110 loads the first BIOS program, then generation is met the first output port 160 by GPU 110
Plot and display signal.When GPU 110 loads the second BIOS program, then the generations of GPU 110 meet painting for second output terminal mouth 170
Figure display signal.
As shown in Figure 1, BIOS switch 140 is electrically connected at the first BIOS 120 and the 2nd BIOS 130, to enable
One of one BIOS 120 and the 2nd BIOS 130 simultaneously close another, and using makes GPU 110 only load the first BIOS program
One of with the second BIOS program.
Output switch 150 is electrically connected at 110 first output ports 160 of GPU and second output terminal mouth 170 passes through
Output switch 150 is electrically connected at GPU 110, and output switch 150 switches the first output port 160 and second output terminal
One of mouth 170 is electrically connected at GPU 110.
As shown in Fig. 2, when the first BIOS 120 is enabled, output switch 150 switches the first output port 160 and electrically connects
It is connected to GPU 110, receives the plot and display signal for meeting the first output port 160.
As shown in figure 3, when the 2nd BIOS 130 is enabled, output switch 150 switches second output terminal mouth 170 and electrically connects
It is connected to GPU 110, receives the plot and display signal for meeting second output terminal mouth 170.
In the particular embodiment, the first output port 160 and the display signal that second output terminal mouth 170 is different size
Output port, a combination thereof can be VGA connectors and DVI connectors, DVI connectors and HDMI connectors, VGA connectors and HDMI connectors.It is logical
Double GPU BIOS frameworks above-mentioned are crossed, user is according to required output port（First output port 160 or second output terminal
Mouth 170）, it selects to enable corresponding GPU BIOS, and coordinate output signal specification.
BIOS switch 140 and output switch 150 above-mentioned can be by manual switchings, but can also be defeated according to first
The connection status of exit port 160 and second output terminal mouth 170, is automatically switched.
As shown in figure 4, for the display circuit 100 disclosed by second embodiment of the invention, in second embodiment, first is defeated
Exit port 160 can further include a detecting pin 162, be electrically connected at BIOS switch 140 and output switch 150,
Judge whether the first output port 160 connects an external display.Detecting pin 162 above-mentioned can draw for the HPD signal of HDMI
Foot.
As shown in figure 5, when the first output port 160 connects external display, then detecting the electric level of pin 162 will carry
Be upgraded to high levle (+), and provide high levle signal as the first switching signal S1, exported respectively to BIOS switch 140 and
Output switch 150.At this point, it is enabled that BIOS switch 140, which switches the first BIOS 120, while output switch 150 switches
First output port 160 is electrically connected at GPU 110, receives the plot and display signal for meeting the first output port 160；It is same in this
When, 130 systems of the 2nd BIOS are closed, and the connection between second output terminal mouth 170 and GPU 110 is set to interrupt.
As shown in fig. 6, when the first output port 160 is without connection external display, the electric level dimension of detecting pin 162
Hold low level (-)；Low level signal is exported respectively as the second switching signal to BIOS switch 140 and output switch
150.At this point, it is enabled that BIOS switch 140, which switches the 2nd BIOS 130, while output switch 150 switches second output terminal
Mouth 170 is electrically connected at GPU 110, receives the plot and display signal for meeting second output terminal mouth 170；Simultaneously, first
BIOS 120 is closed, and the connection between the first output port 160 and GPU 110 is set to interrupt.
As shown in fig. 7, for a kind of display circuit 100 disclosed by third embodiment of the invention, including a plot and display core
Piece 110（GPU 110）, an output switch 150, one first output port 160 and a second output terminal mouth 170.
In 3rd embodiment, GPU 110 stores one first BIOS program and one second BIOS program.110 systems of GPU
One of the first BIOS program or the second BIOS program can be loaded, to generate plot and display signal；By the first BIOS of load
Program or the second BIOS program, GPU 110 determine that it exports the specification of plot and display signal and exports plot and display signal
Foot position, with corresponding first output port 160 or second output terminal mouth 170.
As shown in figure 8, when GPU 110 loads the first BIOS program, output switch 150 switches the first output port 160
It is electrically connected at GPU 110, receives the plot and display signal for meeting the first output port 160.
As shown in figure 9, when GPU 110 loads the second BIOS program, output switch 150 switches second output terminal mouth 170
It is electrically connected at GPU 110, receives the plot and display signal for meeting second output terminal mouth 170.
Similarly, in 3rd embodiment, the first output port 160 is the aobvious of different size with second output terminal mouth 170
Show signal output end mouth.Output switch 150 can be manual switching.
As shown in Figure 10, output switch 150 can be to automatically switch.Wherein, the first output port 160 may include a detecting
Pin 162 is electrically connected at output switch 150, judges whether the first output port 160 connects an external display.
When the first output port 160 connects external display, the first switching signal of detecting pin 162 output to outputting cutting
Parallel operation 150, output switch 150 switch the first output port 160 and are electrically connected at GPU 110.When second output terminal mouth 170 connects
When connecing external display, the second switching signal of detecting pin output to output switch 150（Low level is exported because sky connects）,
Output switch 150 switches second output terminal mouth 170 and is electrically connected at GPU 110.
As shown in figure 11, in first to 3rd embodiment, the number of the first output port 160 and second output terminal mouth 170
Amount respectively only there are one, but actually the first output port 160 can be respectively two or more with second output terminal mouth 170 and export
First output port 160a, 160b groups and second output terminal mouth 170a, 170b groups that port is constituted.In each group
Each output port can be different size, and constitute different specification combinations.
Display circuit through the invention, manufacturer can provide diversified, plurality of specifications display output port, pass through
The BIOS switchings loaded, so that it may to enable the required display output port of user, and be not only restricted to single BIOS and be made
At output port quantity limitation.Meanwhile by the detecting foot position of output port, switching above-mentioned can also become to cut automatically
It changes.
The foregoing is only a preferred embodiment of the present invention, is not limited to protection scope of the present invention.
Claims (8)
1. a kind of display circuit that external display port can be switched, which is characterized in that include：
One plot and display chip, to generate a plot and display signal；
One first plot and display BIOS chip is electrically connected at the plot and display chip, and stores one first
Plot and display basic input output system program；
One second plot and display BIOS chip is electrically connected at the plot and display chip, and stores one second
Plot and display basic input output system program；
One BIOS switch is electrically connected at the first plot and display BIOS chip and second plot and display
BIOS chip, to enable the first plot and display BIOS chip and second plot and display
One of BIOS chip simultaneously closes another, and using, which makes the plot and display chip only load the first drawing, shows
Show one of basic input output system program and the second plot and display basic input output system program；
One output switch is electrically connected at the plot and display chip；
One first output port is electrically connected at the plot and display chip through the output switch；And
One second output terminal mouth is electrically connected at the plot and display chip through the output switch；
Wherein, when the plot and display chip loads the first plot and display basic input output system program, then plot and display chip
The plot and display signal for meeting first output port is generated, and the output switch switches first output port and electrically connects
It is connected to the plot and display chip, receives the plot and display signal for meeting first output port；When the plot and display chip loads
Second plot and display basic input output system program, then plot and display chip generation meet the drawing of the second output terminal mouth
Display signal, and the output switch switches the second output terminal mouth and is electrically connected at the plot and display chip, and reception meets
The plot and display signal of the second output terminal mouth；
And wherein, which includes a detecting pin, is electrically connected at the BIOS switch and output switching
Device, judges whether the first output port connects an external display, wherein：
When first output port connects external display, the first switching signal of detecting pin output to the BIOS switch
And the output switch, the BIOS switch switch the first plot and display BIOS chip be it is enabled, together
When the output switch switch first output port and be electrically connected at the plot and display chip；
When the second output terminal mouth connects external display, the second switching signal of detecting pin output to the BIOS switch
And the output switch, the BIOS switch switch the second plot and display BIOS chip be it is enabled, together
When the output switch switch the second output terminal mouth and be electrically connected at the plot and display chip.
2. the display circuit of external display port can be switched as described in claim 1, which is characterized in that wherein, this is first defeated
Exit port and the display signal output port that the second output terminal mouth is different size.
3. the display circuit of external display port can be switched as described in claim 1, which is characterized in that wherein, which cuts
Parallel operation and output switch are manual switching.
4. the display circuit of external display port can be switched as described in claim 1, which is characterized in that wherein, this is first defeated
Exit port and the quantity of the second output terminal mouth are all multiple, are inputted substantially when the plot and display chip is loaded into the first plot and display
Output system program, then plot and display chip generates the plot and display signal for meeting multiple first output port, and this is defeated
Go out multiple first output port of switch switching and be electrically connected at the plot and display chip, reception meets multiple first output
The plot and display signal of port；When the plot and display chip the second plot and display basic input output system program of loading, then should
Plot and display chip, which generates, meets the plot and display signal of multiple second output terminal mouth, and to switch this more for the output switch
A second output terminal mouth is electrically connected at the plot and display chip, receives the plot and display news for meeting multiple second output terminal mouth
Number.
5. a kind of display circuit that external display port can be switched, which is characterized in that include：
One plot and display chip stores one first plot and display basic input output system program and one second plot and display base
This input-output system program, and the first plot and display basic input output system program of load or the second plot and display are substantially defeated
Enter one of output system program, to generate a plot and display signal；
One output switch is electrically connected at the plot and display chip；
One first output port is electrically connected at the plot and display chip through the output switch；And
One second output terminal mouth is electrically connected at the plot and display chip through the output switch；
Wherein, when the plot and display chip loads the first plot and display basic input output system program, then plot and display chip
The plot and display signal for meeting first output port is generated, and the output switch switches first output port and electrically connects
It is connected to the plot and display chip, receives the plot and display signal for meeting first output port；When the plot and display chip loads
Second plot and display basic input output system program, then plot and display chip generation meet the drawing of the second output terminal mouth
Display signal, and the output switch switches the second output terminal mouth and is electrically connected at the plot and display chip, and reception meets
The plot and display signal of the second output terminal mouth；
And wherein, which includes a detecting pin, is electrically connected at the output switch, judges the first output end
Whether mouth connects an external display, wherein：
When first output port connects external display, the first switching signal of detecting pin output to the output switches
Device, the output switch switch first output port and are electrically connected at the plot and display chip；
When the second output terminal mouth connects external display, the second switching signal of detecting pin output to the output switches
Device, the output switch switch the second output terminal mouth and are electrically connected at the plot and display chip.
6. the display circuit of external display port can be switched as claimed in claim 5, which is characterized in that wherein, this is first defeated
Exit port and the display signal output port that the second output terminal mouth is different size.
7. the display circuit of external display port can be switched as claimed in claim 5, which is characterized in that wherein, output switching
Device is manual switching.
8. the display circuit of external display port can be switched as claimed in claim 5, wherein first output port and this
The quantity of two output ports is all multiple, when the plot and display chip is loaded into the first plot and display basic input output system journey
Sequence, then plot and display chip generates the plot and display signal for meeting multiple first output port, and the output switch is cut
It changes multiple first output port and is electrically connected at the plot and display chip, receive the drawing for meeting multiple first output port
Display signal；When the plot and display chip is loaded into the second plot and display basic input output system program, then the plot and display core
Piece generates the plot and display signal for meeting multiple second output terminal mouth, and multiple second output of output switch switching
Port is electrically connected at the plot and display chip, receives the plot and display signal for meeting multiple second output terminal mouth.
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| CN201410564899.XA CN104360710B (en) | 2014-10-22 | 2014-10-22 | The display circuit of external display port can be switched |
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| CN201410564899.XA CN104360710B (en) | 2014-10-22 | 2014-10-22 | The display circuit of external display port can be switched |
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| CN104360710B true CN104360710B (en) | 2018-07-24 |
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| CN110442389B (en) * | 2019-08-07 | 2024-01-09 | 北京技德系统技术有限公司 | Method for sharing GPU (graphics processing Unit) in multi-desktop environment |
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| TW201037627A (en) * | 2009-04-07 | 2010-10-16 | Nvidia Corp | Graphics system for supporting multiple digital display interface standards |
| CN102779103A (en) * | 2011-05-12 | 2012-11-14 | 宏碁股份有限公司 | Switching circuit, electronic device and independent display card module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5048526B2 (en) * | 2008-01-10 | 2012-10-17 | 株式会社日立製作所 | Computer system and legacy boot method for the computer system |
| TWI414996B (en) * | 2008-04-14 | 2013-11-11 | Asustek Comp Inc | Computer system |
| WO2014051622A1 (en) * | 2012-09-28 | 2014-04-03 | Hewlett-Packard Development Company, L.P. | Selectable graphics controllers to display output |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201037627A (en) * | 2009-04-07 | 2010-10-16 | Nvidia Corp | Graphics system for supporting multiple digital display interface standards |
| CN102779103A (en) * | 2011-05-12 | 2012-11-14 | 宏碁股份有限公司 | Switching circuit, electronic device and independent display card module |
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