CN104035738A - Display mode control method and device - Google Patents
Display mode control method and device Download PDFInfo
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- CN104035738A CN104035738A CN201310068063.6A CN201310068063A CN104035738A CN 104035738 A CN104035738 A CN 104035738A CN 201310068063 A CN201310068063 A CN 201310068063A CN 104035738 A CN104035738 A CN 104035738A
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Abstract
The invention discloses a display mode control method and device. The display mode control method is applied to an electronic device, the electronic device comprises a video graphics array (VGA) interface displaying a drawing array, and the electronic device can be connected with an external connection display through the VGA interface. The display mode control method includes detecting whether an electrical level of the VGA interface displaying the drawing array is changed to obtain a first detection result; closing an extend mode of the electronic device if pull-out of the external connection display is determined according to the first detection result. According to the display mode control method and device, a user's operation of closing the extend mode is not required, and even if a user only pulls out a VGA connection line after use of the extend mode, the electronic device can timely close the extend mode, and thus, electric quantity consumption of the electronic device can be reduced.
Description
Technical field
The present invention relates to electronic technology field, relate in particular to a kind of display mode control method and device.
Background technology
In prior art, need the external multiple displays of some electronic equipment possibilities in order to reach various demonstrations, the interface of electronic equipment external-connection displayer is mainly now: VGA (Video Graphics Array, show drawing array), DVI, S-Video, the interfaces such as Ypbpr.Electronic equipment is in the time connecting external-connection displayer, can be set to various modes by electronic equipment, can be specifically: DualDisplay Extend MODE (mode of extension), DualDisplay Clone MODE (clone mode), DualDisplayTWIN MODE (twin type) etc.
When many demonstrations of video card, electronic equipment can be switched to the associative mode of corresponding external-connection displayer, and one of them is exactly mode of extension (extend mode), i.e. many extensions that display is basic display unit; After external display device disconnects, if do not turn off extend mode, can cause the electronic equipment wasting of resources more serious.The specific implementation of turning off extend mode in prior art is:
Due to the restriction of VGA connector pin definition in prior art, so be the operation that the state of the polling monitor by data channel control bus (DDC bus) is realized the opening and closing of extend mode at present.
Although such scheme can reduce the wasting of resources problem of electronic equipment to a certain extent, but in the time of concrete operations, need the button of user's manual switchover button control VBIOS or enter driver to carry out the switching of pattern, but user is using after extend mode conventionally, just pull out VGA cable and can't carry out follow-up pattern switching flow, still can not stop poll at the data channel controller (DDC controller) of operation so just cause expanding VGA mouth always, so can not realize by the way closing of mode of extension under most of the cases, can there is equally the problem that energy consumption is larger.
Summary of the invention
The invention provides a kind of display mode control method and device, so method and apparatus provided by the present invention solves in prior art because display mode method for handover control needs the artificial low problem that can not reach energy-conservation object of utilization factor that participates in causing.
The invention provides a kind of display mode control method, the method is applied in an electronic equipment, and this electronic equipment comprises a demonstration drawing array VGA interface, and electronic equipment can connect an external-connection displayer by described VGA interface, comprising:
Whether the level of detection display drawing array VGA interface changes, and obtains the first testing result;
If determine that according to the first testing result external display extracts, close the mode of extension of electronic equipment.
The scheme of more optimizing, whether the level of described detection display drawing array VGA interface changes and comprises:
The level that detects arbitrary ground pin in described VGA interface, obtains the second testing result;
Whether the level of determining described VGA interface according to described the second testing result changes.
The scheme of more optimizing, determine according to described the second testing result whether the level of described VGA interface changes and comprise:
The first level prestoring in described the second testing result and embedded controller EC is compared, if the second electrical level in the second testing result is not identical with described the first level, determine that the level of described VGA interface changes; Otherwise the level of determining described VGA interface does not change.
The scheme of more optimizing, this device also further comprises:
Generate the first instruction, and carry out the first instruction; This first instruction is for closing display data passage control main equipment DDC master device and the output of video card core engine GFX core engine to mode of extension.
Also provide a kind of display mode control device based on said method the present invention, this application of installation is in an electronic equipment, this electronic equipment comprises a demonstration drawing array VGA interface, and electronic equipment can connect an external-connection displayer by described VGA interface, and this device comprises:
Whether level detection module, change for detection of the level that shows drawing array VGA interface, obtains the first testing result;
Mode of extension switch module, if for determining that according to the first testing result external display extracts, close the mode of extension of electronic equipment.
The scheme of more optimizing, described level detection module also, for detection of the level of arbitrary ground pin in described VGA interface, obtains the second testing result; Whether the level of determining described VGA interface according to described the second testing result changes.
The scheme of more optimizing, described level detection module also compares for the first level that described the second testing result and embedded controller EC are prestored, if the second electrical level in the second testing result is not identical with described the first level, determine that the level of described VGA interface changes; Otherwise the level of determining described VGA interface does not change.
The scheme of more optimizing, described mode of extension switch module is also for generating the first instruction, and carries out the first instruction; This first instruction is for closing display data passage control main equipment DDC master device and the output of video card core engine GFX core engine to mode of extension.
The present invention also provides a kind of electronic equipment, and this electronic equipment comprises a demonstration drawing array VGA interface, and this electronic equipment can connect an external-connection displayer by described VGA interface, and this electronic equipment comprises:
The programmable input and output pin GPIO of embedded controller EC connects arbitrary ground pin of described VGA interface, and whether the level of detection display drawing array VGA interface changes, and obtains the first testing result; If determine that according to the first testing result external display extracts, close the mode of extension of electronic equipment.
The scheme of more optimizing, embedded controller EC detects the level of arbitrary ground pin in described VGA interface, obtains the second testing result; Whether the level of determining described VGA interface according to described the second testing result changes.
One or two in technique scheme, at least has following technique effect:
In the method and apparatus that the embodiment of the present invention provides, because when electronic equipment external-connection displayer, the level of VGA interface can change, so in embodiments of the present invention, the level that electronic equipment detects VGA interface automatically changes, and is changed and is determined whether electronic equipment disconnects with external display by level.Determining the mode of extension of closing automatically electronic equipment after electronic equipment and external display disconnect.In scheme provided by the present invention, do not need user's employing to close the operation of mode of extension, even so user after extend mode, just pull out VGA cable electronic equipment and also can close timely extend mode using, thereby can reduce the electric weight effect of electronic equipment.
In addition, because in embodiments of the present invention, just a ground pin of VGA interface is connected to the GPIO of EC, thus do not need that one end of the monitor of VGA to transform, so that scheme provided by the present invention realizes is easy.
Brief description of the drawings
Fig. 1 is the process flow diagram of a kind of display mode control method of the embodiment of the present invention;
Fig. 2 is the structural representation of a kind of display mode control device of the embodiment of the present invention;
Fig. 3 is the structural representation of a kind of electronic equipment of the embodiment of the present invention.
Embodiment
The restriction defining because of VGA connector pin in the prior art, so be to realize the operation of the opening and closing of extend mode by data channel control bus (DDC bus) state of poll display at present.Although such scheme can reduce the wasting of resources problem of electronic equipment to a certain extent, but in the time of concrete operations, need the button of user's manual switchover button control VBIOS or enter driver to carry out the switching of pattern, but user is using after extend mode conventionally, just pull out VGA cable and can't carry out follow-up pattern switching flow, still can not stop poll at the DDC controller of operation so just cause expanding VGA mouth always, so can not realize by the way closing of mode of extension under most of the cases, can there is equally the problem that energy consumption is larger.
For the problems referred to above, the invention provides a kind of display mode control method, the method is applied in an electronic equipment, this electronic equipment comprises a demonstration drawing array VGA interface, electronic equipment can connect an external-connection displayer by described VGA interface, the method comprises: whether the level of detection display drawing array VGA interface changes, and obtains the first testing result; If determine that according to the first testing result external display extracts, close the mode of extension of electronic equipment.
Because when electronic equipment external-connection displayer, the level of VGA interface can change, so in embodiments of the present invention, the level that electronic equipment detects VGA interface automatically changes, and is changed and is determined whether electronic equipment disconnects with external display by level.Determining the mode of extension of closing automatically electronic equipment after electronic equipment and external display disconnect.In scheme provided by the present invention, do not need user's employing to close the operation of mode of extension, even so user after extend mode, just pull out VGA cable electronic equipment and also can close timely extend mode using, thereby can reduce the electric weight effect of electronic equipment.
For the scheme that the clearer explanation embodiment of the present invention provides, the method embodiment of the present invention being provided below in conjunction with Figure of description is described in detail:
As shown in Figure 1, the embodiment of the present invention provides a kind of display mode control method, below in conjunction with Figure of description, the specific embodiment of the present invention is elaborated:
The method is applied in an electronic equipment, and this electronic equipment comprises a demonstration drawing array VGA interface, and electronic equipment can connect an external-connection displayer (extend VGA monitor) by described VGA interface, and the method specifically comprises:
Step 101, whether the level of detection display drawing array VGA interface changes, and obtains the first testing result;
This electronic equipment comprises the VGA interface of an external expanded scope (or being called external-connection displayer), and in the time that VGA interface is connected with expanded scope or disconnects, the level of VGA interface can change.So can determine by the level that detects VGA interface whether electronic equipment disconnects with electronic equipment, thereby determine whether to close extend mode.
Step 102, if determine that according to the first testing result external display extracts, closes the mode of extension of electronic equipment.
VGA interface is a kind of D type interface, has 15 pin holes above, is divided into three rows, five of every rows.Wherein, except 2 NC (Not Connect) signal, 3 show data buss and 5 GND signals, important is 3 RGB color component signals and 2 scan-synchronized signal HSYNC and VSYNC pin.In VGA interface, chrominance component adopts RS343 level standard.The crest voltage of RS343 level standard is 1V.VGA interface is the interface type being most widely used on video card, and most video cards are all with this kind of interface.Some not with VGA interface with the video card of DVI (Digital Visual Interface digital visual interface) interface, also can DVI interface be changed into VGA interface by a simple adapter.
Based on the said structure of VGA interface, and the characteristic of ground pin variation of meeting outlet level in the time that expanded scope is extracted or connect, so whether the level of the drawing of detection display described in embodiment of the present invention array VGA interface changes comprise:
The level that detects arbitrary ground pin in described VGA interface, obtains the second testing result; Whether the level of determining described VGA interface according to described the second testing result changes.
This second testing result is high level or low level, determines whether the level of described VGA interface changes comprise according to described the second testing result:
The first level prestoring in described the second testing result and embedded controller EC is compared, if the second electrical level in the second testing result is not identical with described the first level, determine that the level of described VGA interface changes; Otherwise the level of determining described VGA interface does not change.
In original VGA structural design, so the level of each stitch is what to determine, can determine that the first level prestoring in embedded controller EC is high level or low level according to the characteristic of stitch, thereby determine whether the level of described VGA interface changes.
In order further to reach energy-conservation effect, this device also further comprises:
Generate the first instruction, and carry out the first instruction; This first instruction is used for closing display data passage control main equipment (DDC master device) and the output of video card core engine (GFX core engine) to mode of extension.
Said method is in the time of concrete application, because there are multiple ground connection PIN above VGA connector, wherein having several PIN is redundancy GND that the GND in order to ensure MB and monitor is connected, and can select one of them pin5 (Ground) as hotplug signal in the time that specific implementation detects.Pin5 is received to the GPIO above the EC of mainboard, because when without external VGA signal, Pin5 is high level; In the time connecting VGA signal outward, Pin5 will be low level.So so whether accessed external VGA in order to detect, can arrange on mainboard in embodiments of the present invention and detect the external Pin5 default value whether connecting is high level.Mainboard carries out the action of switch according to described default value to extend VGA mode function, closes DDC master device and GFX core engine to extend mode output simultaneously, realizes energy-conservation object.
As shown in Figure 2, also provide a kind of display mode control device according to the said method embodiment of the present invention, this application of installation is in an electronic equipment, and this electronic equipment comprises a demonstration drawing array VGA interface, electronic equipment can connect an external-connection displayer by described VGA interface, and this device comprises:
Whether level detection module 201, change for detection of the level that shows drawing array VGA interface, obtains the first testing result;
Mode of extension switch module 202, if for determining that according to the first testing result external display extracts, close the mode of extension of electronic equipment.
Wherein, described level detection module 201 also, for detection of the level of arbitrary ground pin in described VGA interface, obtains the second testing result; Whether the level of determining described VGA interface according to described the second testing result changes.
Further, described level detection module 201 also compares for the first level that described the second testing result and embedded controller EC are prestored, if the second electrical level in the second testing result is not identical with described the first level, determine that the level of described VGA interface changes; Otherwise the level of determining described VGA interface does not change.
In order to reach thoroughly energy-conservation object, this device also further comprises:
Described mode of extension switch module 202 is also for generating the first instruction, and carries out the first instruction; This first instruction is for closing display data passage control main equipment DDC master device and the output of video card core engine GFX core engine to mode of extension.
As shown in Figure 3, in concrete realization, the present invention also provides a kind of electronic equipment, and this electronic equipment comprises a demonstration drawing array VGA interface 301, and this electronic equipment can connect an external-connection displayer by described VGA interface 301, and this electronic equipment comprises:
The programmable input and output pin GPIO of embedded controller EC302 connects arbitrary ground pin of described VGA interface, and whether the level of detection display drawing array VGA interface changes, and obtains the first testing result; If determine that according to the first testing result external display extracts, close the mode of extension of electronic equipment.
Embedded controller EC302 detects the level of arbitrary ground pin in described VGA interface, obtains the second testing result; Whether the level of determining described VGA interface according to described the second testing result changes.
According to said method, the present invention has realized the Energy Saving Control of VGA interface.The method that the embodiment of the present invention provides in concrete application than existing concrete effect is (design parameter is as shown in table 1):
| Item | Connector?present | Output?monitor | Max.C(A) | Mean.C(A) | Consumption(w) |
| A | DP&VGA | VGA，DP | 1.92 | 1.615 | 1.696 |
| B | DP&VGA | DP | 1.8 | 1.502 | 1.577 |
| C | DP | DP | 1.76 | 1.489 | 1.563 |
Table 1
In table 1, connector present represents the display joint that PC is connecting; Output monitor is illustrated in the display of use; The lowest high-current value of the core power of Max.C (Max.Current) test PCH; The average current value of the core power of Mean.C (Mean.Current) test PCH.
Item A is above applied in the scene that mode of extension uses, and the demonstration engine of two is in running, at this time power consumption maximum;
Item B is exactly that mode of extension is finished using, but extend graphic Engine/Pipeline and relevant DDC bus are also being worked, test result shows, the power consumption of PCH at this time declines to some extent, but with the situation of having closed graphics engine (graphic Engine) and DDC, be that item C carrys out comparison, still have the consumption of power consumption;
By the present invention, can realize and pulling out after VGA extension header as user, system directly drops to the power consumption of display graphics engine in system (graphic Engine) state of item C.And do not need to remove to switch driver option by user, thereby could realize this function. reach in real time effectively energy-saving effect.
Above-mentioned one or more technical schemes in the embodiment of the present application, at least have following technique effect:
The invention provides a kind of display mode control method and device, the method is applied in an electronic equipment, this electronic equipment comprises a demonstration drawing array VGA interface, electronic equipment can connect an external-connection displayer by described VGA interface, the method comprises: whether the level of detection display drawing array VGA interface changes, and obtains the first testing result; If determine that according to the first testing result external display extracts, close the mode of extension of electronic equipment.
Because when electronic equipment external-connection displayer, the level of VGA interface can change, so in embodiments of the present invention, the level that electronic equipment detects VGA interface automatically changes, and is changed and is determined whether electronic equipment disconnects with external display by level.Determining the mode of extension of closing automatically electronic equipment after electronic equipment and external display disconnect.In scheme provided by the present invention, do not need user's employing to close the operation of mode of extension, even so user after extend mode, just pull out VGA cable electronic equipment and also can close timely extend mode using, thereby can reduce the electric weight effect of electronic equipment.
In addition, because in embodiments of the present invention, just a ground pin of VGA interface is connected to the GPIO of EC, thus do not need that one end of display (monitor) to VGA to transform, so that scheme provided by the present invention realizes is easy.
Method of the present invention is not limited to the embodiment described in embodiment, and those skilled in the art's technical scheme according to the present invention draws other embodiment, belongs to equally technological innovation scope of the present invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (10)
1. a display mode control method, the method is applied in an electronic equipment, and this electronic equipment comprises a demonstration drawing array VGA interface, and electronic equipment can connect an external-connection displayer by described VGA interface, it is characterized in that, comprising:
Whether the level of detection display drawing array VGA interface changes, and obtains the first testing result;
If determine that according to the first testing result external display extracts, close the mode of extension of electronic equipment.
2. the method for claim 1, is characterized in that, whether the level of described detection display drawing array VGA interface changes and comprise:
The level that detects arbitrary ground pin in described VGA interface, obtains the second testing result;
Whether the level of determining described VGA interface according to described the second testing result changes.
3. method as claimed in claim 2, is characterized in that, determines whether the level of described VGA interface changes comprise according to described the second testing result:
The first level prestoring in described the second testing result and embedded controller EC is compared, if the second electrical level in the second testing result is not identical with described the first level, determine that the level of described VGA interface changes; Otherwise the level of determining described VGA interface does not change.
4. the method as described in claim 1～3 any one, is characterized in that, this device also further comprises:
Generate the first instruction, and carry out the first instruction; This first instruction is for closing display data passage control main equipment DDC master device and the output of video card core engine GFX core engine to mode of extension.
5. a display mode control device, this application of installation is in an electronic equipment, and this electronic equipment comprises a demonstration drawing array VGA interface, and electronic equipment can connect an external-connection displayer by described VGA interface, it is characterized in that, and this device comprises:
Whether level detection module, change for detection of the level that shows drawing array VGA interface, obtains the first testing result;
Mode of extension switch module, if for determining that according to the first testing result external display extracts, close the mode of extension of electronic equipment.
6. device as claimed in claim 5, is characterized in that, described level detection module also, for detection of the level of arbitrary ground pin in described VGA interface, obtains the second testing result; Whether the level of determining described VGA interface according to described the second testing result changes.
7. device as claimed in claim 6, it is characterized in that, described level detection module also compares for the first level that described the second testing result and embedded controller EC are prestored, if the second electrical level in the second testing result is not identical with described the first level, determine that the level of described VGA interface changes; Otherwise the level of determining described VGA interface does not change.
8. the device as described in claim 5～7 any one, is characterized in that, described mode of extension switch module is also for generating the first instruction, and carries out the first instruction; This first instruction is for closing display data passage control main equipment DDC master device and the output of video card core engine GFX core engine to mode of extension.
9. an electronic equipment, this electronic equipment comprises a demonstration drawing array VGA interface, and this electronic equipment can connect an external-connection displayer by described VGA interface, it is characterized in that, this electronic equipment comprises:
The programmable input and output pin GPIO of embedded controller EC connects arbitrary ground pin of described VGA interface, and whether the level of detection display drawing array VGA interface changes, and obtains the first testing result; If determine that according to the first testing result external display extracts, close the mode of extension of electronic equipment.
10. electronic equipment as claimed in claim 9, is characterized in that, embedded controller EC detects the level of arbitrary ground pin in described VGA interface, obtains the second testing result; Whether the level of determining described VGA interface according to described the second testing result changes.
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| CN201310068063.6A CN104035738A (en) | 2013-03-04 | 2013-03-04 | Display mode control method and device |
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| CN201310068063.6A CN104035738A (en) | 2013-03-04 | 2013-03-04 | Display mode control method and device |
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| CN104035738A true CN104035738A (en) | 2014-09-10 |
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Cited By (1)
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| CN112804517A (en) * | 2019-11-13 | 2021-05-14 | 浙江宇视科技有限公司 | Detection circuit and display output device based on video graphic array interface |
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