CN101577108B - Portable electronic device and method for switching display unit - Google Patents
Portable electronic device and method for switching display unit Download PDFInfo
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- CN101577108B CN101577108B CN2008100958852A CN200810095885A CN101577108B CN 101577108 B CN101577108 B CN 101577108B CN 2008100958852 A CN2008100958852 A CN 2008100958852A CN 200810095885 A CN200810095885 A CN 200810095885A CN 101577108 B CN101577108 B CN 101577108B
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Abstract
The invention discloses a method for switching a display unit. The method comprises the following steps: firstly, receiving a display switching signal; then detecting the resolution information of an external display unit, if the resolution information of the external display unit is obtained, adjusting the resolution of an image signal according to the resolution information, and if the resolution information of the external display unit can not be obtained, adjusting the resolution of the image signal according to a preset resolution; and then, determining whether the image signal needs to be output to the external display unit or not according to the display switching signal. On the other hand, the invention also provides a portable electronic device which is suitable for the method forswitching the display unit.
Description
Technical field
The invention relates to a kind of method of switching display unit, and particularly relevant for a kind of method of switching the display unit of portable electronic devices.
Background technology
Along with development in science and technology is at a tremendous pace, notebook computer powerful and easy to carry has been played the part of epochmaking role in people's life.By the use of notebook computer, the user just can allow and momentarily deal with the work or the operation of school.In general, notebook computer can dispose multiple linkage unit, in order to connect peripheral equipment miscellaneous.For example, the user can utilize the USB (universal serial bus) of notebook computer (Universal Serial Bus, the USB) linkage unit of interface interface connects printer, mouse and keyboard or the like.In addition, under the limited volume of notebook computer, the size of screen also relatively is restricted.Therefore, notebook computer also can utilize analog video (D-subminiature, D-Sub) linkage unit of interface interface comes display units such as external screen or projector, allowing the user can more cosily watch display frame, or carries out bulletin work.
The quick functional key of existing notebook computer, forgiven mostly can switching display unit function.But because the resolution that the resolution of the built-in display unit of notebook computer can be set is more and more, the resolution that each different external display unit of while is supported is also had nothing in common with each other.Therefore, not supporting or inappropriate resolution if set external display unit, when switching signal of video signal to external display unit, is not that picture displayed is undesired, is exactly can't handover success, and causes external display unit to show.What the user saw from external display unit may be the blank out picture.Thus, will cause the user not know is that what thing has taken place on earth, and why also do not know can not switching display unit.
Summary of the invention
The invention provides a kind of method of switching display unit, can when switching display unit, guarantee that display unit normally shows.
The invention provides a kind of portable electronic devices, can be applied to the method for above-mentioned switching display unit.
The present invention proposes a kind of method of switching display unit, comprises that receiving one earlier shows switching signal.Then, detect a resolution information of an external display unit.If obtain the resolution information of external display unit, then adjust the resolution of a signal of video signal according to resolution information.If can't obtain the resolution information of external display unit, then adjust the resolution of signal of video signal according to a default resolution.Afterwards, according to showing switching signal, whether decision exports signal of video signal to external display unit.
In one embodiment of this invention, resolution information is represented the ultimate resolution of external display unit.
In one embodiment of this invention, detect the step of the resolution information of external display unit, comprise that reading one of external display unit shows specification information.
In one embodiment of this invention, show specification information be an extending display identification data (ExtendedDisplay Identification Data, EDID).
In one embodiment of this invention, to the external display unit, the method for display unit also comprises a running resolution of record one built-in display unit in output image signal.
In one embodiment of this invention, the method for display unit comprises also whether decision exports signal of video signal to built-in display unit with running resolution according to showing switching signal.
In one embodiment of this invention, default resolution is 800 * 600.
The present invention more proposes a kind of portable electronic devices, comprises that a display chip, a built-in display unit, a linkage unit, show a switch unit and a resolution detecting unit.Display chip is in order to export a signal of video signal.Built-in display unit is in order to receive signal of video signal.Linkage unit is suitable for being connected to an external display unit.Show that switch unit is coupled to display chip, built-in display unit and linkage unit,, whether signal of video signal is exported to external display unit with decision, and whether decision exports to built-in display unit with signal of video signal in order to according to a demonstration switching signal.The resolution detecting unit is coupled between linkage unit and the display chip, in order to detecting a resolution information of external display unit, and sends resolution information to display chip.Display chip is then adjusted the resolution of signal of video signal if obtain the resolution information of external display unit according to resolution information.Display chip is then adjusted the resolution of signal of video signal if can't obtain the resolution information of external display unit according to a default resolution.
In one embodiment of this invention, resolution information is represented the ultimate resolution of external display unit.
In one embodiment of this invention, the resolution detecting unit detects the resolution information of external display unit by a demonstration specification information that reads external display unit.
In one embodiment of this invention, show that specification information is an extending display identification data.
In one embodiment of this invention, portable electronic devices also comprises a storage element, in order to store default resolution.
In one embodiment of this invention, storage element is also in order to write down a running resolution of built-in display unit.
In one embodiment of this invention, when showing that the switch unit decision is exported to built-in display unit with signal of video signal, display chip is according to running resolution, and output image signal is to built-in display unit.
In one embodiment of this invention, portable electronic devices comprises that also one shows switching key, shows switching signal in order to trigger.
In one embodiment of this invention, default resolution is 800 * 600.
In one embodiment of this invention, built-in display unit be a LCD (Liquid CrystalDisplay, LCD) or an organic light emitting diode display (Organic Light Emitter Diode Display, OLED).
In one embodiment of this invention, external display unit is a LCD, an organic light emitting diode display or an optical projector (optical projector).
No matter whether the method for switching display unit of the present invention and portable electronic devices can obtain under the situation of resolution information of external display unit, and the resolution that does not have a signal of video signal exceeds the situation of the resolving range that external display unit supports.Therefore, when switching signal of video signal, can guarantee the normally display frame of external display unit, also not need artificial judgment whether to show normally, quite facility to external display unit.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is connected to the synoptic diagram of external display unit for the portable electronic devices of one embodiment of the invention.
Fig. 2 is the process flow diagram of the switching display packing of one embodiment of the invention.
Fig. 3 is the process flow diagram of the switching display packing of another embodiment of the present invention.
The main element symbol description:
50: external display unit
100: portable electronic devices
110: display chip
120: built-in display unit
130: linkage unit
140: show switch unit
150: the resolution detecting unit
160: show switching key
170: storage element
S110～S150, S210～S290: each step of the method for switching display unit
Embodiment
Fig. 1 is connected to the synoptic diagram of external display unit for the portable electronic devices of one embodiment of the invention.Please refer to Fig. 1, portable electronic devices 100 comprises that a display chip 110, one built-in display unit 120, a linkage unit 130, show a switch unit 140 and a resolution detecting unit 150.Display chip 110 is in order to exporting a signal of video signal, and by showing that switch unit 140 is coupled to built-in display unit 120 and linkage unit 130.Built-in display unit 120 is in order to receive the signal of video signal of display chip 110 outputs.In the present embodiment, portable electronic devices 100 is a notebook computer for example, and built-in display unit 120 can be a LCD or an organic light emitting diode display or the like.
Linkage unit 130 can be connected with an external display unit 50 by the D-sub interface, and external display unit 50 for example is a LCD, an organic light emitting diode display or an optical projector.Show switch unit 140 in order to according to a demonstration switching signal, whether signal of video signal is exported to external display unit 50 with decision, and whether decision is exported to built-in display unit 120 with signal of video signal.In the present embodiment, portable electronic devices 100 can comprise that more one shows switching key 160, shows switching signal in order to trigger.Show that switching key 160 can be Macintosh or a function button independently on the keyboard (not illustrating) of portable electronic devices 100.In addition, in the embodiment that another does not illustrate, the user also can trigger the demonstration switching signal by an application program.
Resolution detecting unit 150 is coupled between linkage unit 130 and the display chip 110, in order to detecting a resolution information of external display unit 50, and sends resolution information to display chip 110.In the present embodiment, resolution detecting unit 150 can detect the resolution information of external display unit 50 by a demonstration specification information that reads external display unit 50.Resolution information for example is the ultimate resolution of external display unit 50, shows that specification information then can be an extending display identification data.Further, in the operating system " Windows XP " of Microsoft, resolution detecting unit 150 can utilize the driver of display chip 110, also or call out Basic Input or Output System (BIOS) (Basic Input Output System BIOS) obtains the extending display identification data of external display unit 50.In addition, in the operating system " Windows Vista " of Microsoft, resolution detecting unit 150 also can pass through form management regulation (WindowsManagement Instrumentation, WMI) (Application ProgrammingInterface API) obtains the extending display identification data of external display unit 50 to application programming interfaces.
If display chip 110 can pass through resolution detecting unit 150, obtain the resolution information of external display unit 50, then adjust the resolution of signal of video signal according to resolution information.But in the time of can't obtaining the resolution information of external display unit 50 as if display chip 110, then adjust the resolution of signal of video signal according to a default resolution.In the present embodiment, portable electronic devices 100 also can comprise a storage element 170, is coupled to display chip 110, in order to store aforesaid default resolution.Because display unit great majority now can both show 800 * 600 resolution, so default resolution can be set at 800 * 600.Certainly, the user can set default resolution according to the behaviour in service of reality, not as limit.
What deserves to be mentioned is no matter whether display chip 110 can obtain the resolution information of external display unit 50, the situation that the resolution that does not have a signal of video signal exceeds the resolving range that external display unit 50 supported produces.That is, when switching signal of video signal, can guarantee the normally display frame of external display unit 50 to external display unit 50, do not need artificial judgment whether to show normally, quite facility yet.
Fig. 2 is the process flow diagram of the switching display packing of one embodiment of the invention.Below will cooperate Fig. 2, illustrate that portable electronic devices 100 is in the detailed process of built-in display unit 120 and external display unit 50 being switched signal of video signal.At first carry out step S110, receive the demonstration switching signal.Show switching key 160 or carry out when switching the function that shows when the user pushes, just can trigger the demonstration switching signal with software.At this moment, show that switch unit 140 promptly can receive the demonstration switching signal.Then carry out step S120, detect the resolution information of external display unit 50.Specifically, after showing that switch unit 140 receives the demonstration switching signal, show that switch unit 140 sends a signal, notice display chip 110 will switch to signal of video signal external display unit 50.Display chip 110 relends the resolution information that is removed to detect external display unit 50 by resolution detecting unit 150.
Carry out step S130 afterwards, judge whether to detect the resolution information of external display unit.If resolution detecting unit 150 obtains the resolution information of external display unit 50, then carry out step S140, allow display chip 110 adjust the resolution of signal of video signal according to resolution information.If resolution detecting unit 150 can't obtain the resolution information of external display unit 50, then carry out step S150, allow display chip 110 adjust the resolution of signal of video signal according to default resolution.After display chip 110 was adjusted the resolution of signal of video signal according to resolution information or default resolution, output image signal was to external display unit 50.
Fig. 3 is the process flow diagram of the switching display packing of another embodiment of the present invention.Please refer to Fig. 1 and Fig. 3, present embodiment and last embodiment are similar, also can with the portable electronic devices 100 that is applied to Fig. 1, resemblance will repeat no more.At first carry out step S210, receive the user and push the demonstration switching signal that shows that switching key 160 is triggered, whether signal of video signal is exported to external display unit 50 with decision.Then carry out step S220, write down a running resolution of built-in display unit 120.In the present embodiment, the running resolution of built-in display unit 120 can be stored among the storage element 170.
Carry out step S230 then, resolution detecting unit 150 judges whether to detect the ultimate resolution (step S240) of external display unit 50 by the extending display identification data that reads external display unit 50.If resolution detecting unit 150 can't obtain the ultimate resolution of external display unit 50, then carry out step S250, display chip 110 is according to the resolution of default resolution adjustment signal of video signal, and output image signal is to external display unit 50.If when resolution detecting unit 150 obtains the ultimate resolution of external display unit 50, carry out step S260, judge that whether running resolution is greater than ultimate resolution.
Because running resolution is greater than the situation of ultimate resolution, when the expression signal of video signal exported external display 50 to running resolution, external display 50 possibly can't normally show.Therefore, when judging running resolution greater than ultimate resolution, carry out step S270, display chip 110 is adjusted signal of video signal according to ultimate resolution, and output image signal is to external display unit 50, and can allow external display unit 50 normally show.
In addition, when judging running resolution greater than ultimate resolution, then carry out step S280, display chip 110 can be according to running resolution, and output image signal is to external display unit 50.At this moment, because the original running resolution of the resolution of external display unit 50 shown pictures and built-in display unit 120 is consistent, so the diagram arranged mode of operating system desktop etc. are the same with the situation that the user saw on built-in display unit 120 originally all.Concerning the user, some shown positions commonly used can not change, and relatively meet user's custom, and are convenient to user's operation.
When finishing the use of external display unit 50, the user just can press once more and show switching key 160, triggers the demonstration switching signal.At this moment, carry out step S290, adjust the resolution of signal of video signal according to the stored running resolution of storage element 170, and output image signal is to built-in display unit 120.Afterwards, external display unit 50 can be removed from linkage unit 130.
In sum, the method of switching display unit of the present invention and portable electronic devices, whether no matter can obtain under the situation of resolution information of external display unit, the resolution that does not have a signal of video signal exceeds the situation of the resolving range that external display unit supports.Therefore, when switching signal of video signal, can guarantee the normally display frame of external display unit, also not need artificial judgment whether to show normally, quite facility to external display unit.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (18)
1. the method for a switching display unit comprises:
Receive one and show switching signal;
Detect a resolution information of an external display unit;
If obtain the resolution information of this external display unit, then adjust the resolution of a signal of video signal according to this resolution information;
If can't obtain the resolution information of this external display unit, then adjust the resolution of this signal of video signal according to a default resolution; And
Show switching signal according to this, whether decision exports this signal of video signal to this external display unit.
2. the method for switching display unit as claimed in claim 1 is characterized in that, this resolution information is represented the ultimate resolution of this external display unit.
3. the method for switching display unit as claimed in claim 1 is characterized in that, detects the step of this resolution information of this external display unit, comprising:
Read one of this external display unit and show specification information.
4. the method for switching display unit as claimed in claim 3 is characterized in that, this demonstration specification information is an extending display identification data.
5. the method for switching display unit as claimed in claim 1 is characterized in that,, also comprises to this external display unit at this signal of video signal of output:
Write down a running resolution of a built-in display unit.
6. the method for switching display unit as claimed in claim 5 is characterized in that, also comprises:
Show switching signal according to this, whether decision exports this signal of video signal to this built-in display unit with this running resolution.
7. the method for switching display unit as claimed in claim 1 is characterized in that, this default resolution is 800 * 600.
8. portable electronic devices comprises:
One display chip is in order to export a signal of video signal;
One built-in display unit is in order to receive this signal of video signal;
One linkage unit is suitable for being connected to an external display unit;
One shows switch unit, be coupled to this display chip, this built-in display unit and this linkage unit, in order to according to a demonstration switching signal, whether this signal of video signal is exported to this external display unit with decision, and whether decision exports to this built-in display unit with this signal of video signal; And
One resolution detecting unit is coupled between this linkage unit and this display chip, in order to detecting a resolution information of this external display unit, and sends this resolution information to this display chip;
Wherein this display chip is then adjusted the resolution of this signal of video signal if obtain the resolution information of this external display unit according to this resolution information; If can't obtain the resolution information of this external display unit, then adjust the resolution of this signal of video signal according to a default resolution.
9. portable electronic devices as claimed in claim 8 is characterized in that this resolution information is represented the ultimate resolution of this external display unit.
10. portable electronic devices as claimed in claim 8 is characterized in that, this resolution detecting unit detects this resolution information of this external display unit by a demonstration specification information that reads this external display unit.
11. portable electronic devices as claimed in claim 10 is characterized in that, this demonstration specification information is an extending display identification data.
12. portable electronic devices as claimed in claim 8 is characterized in that, also comprises:
One storage element should default resolution in order to store.
13. portable electronic devices as claimed in claim 12 is characterized in that, this storage element is also in order to write down a running resolution of this built-in display unit.
14. portable electronic devices as claimed in claim 13, it is characterized in that, when this demonstration switch unit decision was exported to this built-in display unit with this signal of video signal, this display chip operated resolution according to this, exports this signal of video signal to this built-in display unit.
15. portable electronic devices as claimed in claim 8 is characterized in that, also comprises:
One shows switching key, in order to trigger this demonstration switching signal.
16. portable electronic devices as claimed in claim 8 is characterized in that, this default resolution is 800 * 600.
17. portable electronic devices as claimed in claim 8 is characterized in that, this built-in display unit is a LCD or an organic light emitting diode display.
18. portable electronic devices as claimed in claim 8 is characterized in that, this external display unit is a LCD, an organic light emitting diode display or an optical projector.
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| CN2008100958852A CN101577108B (en) | 2008-05-07 | 2008-05-07 | Portable electronic device and method for switching display unit |
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| CN2008100958852A CN101577108B (en) | 2008-05-07 | 2008-05-07 | Portable electronic device and method for switching display unit |
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| CN101577108B true CN101577108B (en) | 2011-06-22 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102117161A (en) * | 2009-12-31 | 2011-07-06 | 和硕联合科技股份有限公司 | Electronic device and method for adjusting and controlling projection resolution ratio of electronic device |
| TWI493444B (en) * | 2012-01-10 | 2015-07-21 | Asustek Comp Inc | Switching displaying method and portable device thereof |
| CN103258509B (en) * | 2012-02-20 | 2016-07-06 | 联想(北京)有限公司 | A kind of method regulating resolution and electronic equipment |
| CN103995416B (en) * | 2013-01-18 | 2015-08-26 | 光宝科技股份有限公司 | Laser projection device and method of operating thereof |
| CN104103256A (en) * | 2013-04-12 | 2014-10-15 | 宏碁股份有限公司 | Electronic device and image display parameter adjustment method |
| CN103279320B (en) * | 2013-06-19 | 2016-01-27 | 成都智元汇数码科技有限公司 | The screen of the multiple different resolution of interactive projection system carries out the method for interactive display |
| CN103915063B (en) * | 2014-04-17 | 2016-06-29 | 西安诺瓦电子科技有限公司 | LED display controls card and controls system, resolution self-adapting regulation method |
| CN105225646B (en) * | 2015-10-09 | 2017-11-10 | 惠科股份有限公司 | Method and system for adjusting display parameters of display signal |
| CN107633792B (en) * | 2017-08-31 | 2023-07-21 | 北京集创北方科技股份有限公司 | Display device and display control method |
| CN107613238A (en) * | 2017-09-04 | 2018-01-19 | 西安万像电子科技有限公司 | The treating method and apparatus of content of multimedia |
| WO2019104476A1 (en) * | 2017-11-28 | 2019-06-06 | 深圳迈瑞生物医疗电子股份有限公司 | Monitor and display screen switching method therefor |
| CN112492250B (en) * | 2020-11-27 | 2023-07-21 | 西安万像电子科技有限公司 | Method and device for adapting resolution of transmitting and receiving ends of image transmission system |
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