CN108429896A - A kind of method of vision signal selection output - Google Patents
A kind of method of vision signal selection output Download PDFInfo
- Publication number
- CN108429896A CN108429896A CN201810191994.8A CN201810191994A CN108429896A CN 108429896 A CN108429896 A CN 108429896A CN 201810191994 A CN201810191994 A CN 201810191994A CN 108429896 A CN108429896 A CN 108429896A
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- China
- Prior art keywords
- vision signal
- mainboard
- signal
- external video
- rtd2556t
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention relates to a kind of methods of vision signal selection output.This method exports mainboard vision signal by mainboard PCH, and the mainboard vision signal is converted to eDP or LVDS signals by RTD2556T chips；External video inputs external video signal, and the external video signal is converted to eDP or LVDS signals by RTD2556T chips；The GPIO signals control that RTD2556T is exported by external EC realizes that the one-out-three of mainboard vision signal and external video signal exports；The method of vision signal selection output of the present invention, the implementation of VGA, DVI, HDMI or DP video input signals selection output can be met without switch chip, solved the problems, such as that switch selection chip switch frequency is insufficient well, saved cost.
Description
Technical field
The present invention relates to a kind of methods of vision signal selection output, belong to the technical field of KVM.
Background technology
Display driving is extensively in the products display module such as ruggedized monitor and KVM, all-in-one machine；Such as certain reinforces notes
This, needs to meet manual any switching laws video source (mainboard video signal source and outside KVM video signal sources) and carries out selection output
It has been shown that, traditional way are the LVDS signals for the VGA conversions that the LVDS signals of mainboard output are inputted with outside KVM by one two
Select a switch chip to carry out selection output, such scheme has some limitations, such as nowadays LVDS liquid crystal displays gradually by eDP
Liquid crystal display is replaced, and since the frequency of eDP signals is far above LVDS signals, existing switch chip cannot meet eDP signals pair
The requirement of signaling switch frequency is (for example, existing switch chip IC_PQFP-N36_TS3DV20812 maximum switching frequencies only have
2Gbps can only meet LVDS demand signals, and eDP signal frequency single channels reach 8.1Gbps), it needs to introduce higher switch frequency
The chip of rate, product cost dramatically increase.
In technology vision signal select output specific method for：First, mainboard PCH exports LVDS signals, and LVDS letters are defeated
Enter either-or switch chip IC _ PQFP-N36_TS3DV20812；Then, external video inputs VGA signals, is driven by display
Chip RTD2556T is converted to LVDS signals；Finally, either-or switch chip IC _ PQFP-N36_TS3DV20812, passes through outside
The alternative output of two-way LVDS signals is realized in the GPIO signals control of EC outputs；
The method of above-mentioned vision signal selection output in the prior art exists insufficient：1) can only at most there be two-way
Vision signal switches；2) LVDS liquid crystal displays can only be supported, eDP liquid crystal displays can not be propped up due to opening the light chip switch frequency limit
It holds；3) due to needing to use a switch chip, cost increases more.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of method of vision signal selection output.
The technical scheme is that：
A kind of method of vision signal selection output, including steps are as follows：
1) mainboard PCH export mainboard vision signal, the mainboard vision signal by RTD2556T chips be converted to eDP or
LVDS signals；The mainboard vision signal includes DP/HDMI/DVI/VGA；
2) external video inputs external video signal, and the external video signal is converted to eDP by RTD2556T chips
Or LVDS signals；The external video signal includes DP/HDMI/DVI/VGA；
3) mainboard vision signal and external video signal are realized in the GPIO signals control that RTD2556T is exported by external EC
One-out-three output；The signal form of output signal is eDP or LVDS.
Beneficial effects of the present invention are：
1. the method for vision signal of the present invention selection output, without switch chip can meet VGA, DVI, HDMI or
The implementation of DP video input signals selection output solves the problems, such as that switch selection chip switch frequency is insufficient well,
Cost is saved；
2. the method for vision signal selection output of the present invention can at most support three tunnel vision signal switchings, compatible
Support the output of LVDS and eDP signals；Switch chip is not needed, it is cost-effective.
Description of the drawings
Fig. 1 is the method flow diagram of vision signal selection output in the prior art；
Fig. 2 is the method flow diagram of vision signal of the present invention selection output.
Specific implementation mode
With reference to embodiment and Figure of description, the present invention will be further described, but not limited to this.
Embodiment 1
As shown in Figure 2.
A kind of method of vision signal selection output, including steps are as follows：
1) mainboard PCH export mainboard vision signal, the mainboard vision signal by RTD2556T chips be converted to eDP or
LVDS signals；The mainboard vision signal includes DP and HDMI；
2) external video inputs external video signal, and the external video signal is converted to eDP by RTD2556T chips
Or LVDS signals；The external video signal includes DVI；
3) mainboard vision signal and external video signal are realized in the GPIO signals control that RTD2556T is exported by external EC
One-out-three output；The signal form of output signal is eDP.
Embodiment 2
The method of vision signal selection output as described embodiments, except that：
The mainboard vision signal includes VGA；The external video signal includes DP and HDMI；The signal of output signal
Form is LVDS.
Claims (1)
1. a kind of method of vision signal selection output, which is characterized in that including steps are as follows：
1) mainboard PCH exports mainboard vision signal, and the mainboard vision signal is converted to eDP or LVDS by RTD2556T chips
Signal；The mainboard vision signal includes DP/HDMI/DVI/VGA；
2) external video input external video signal, the external video signal by RTD2556T chips be converted to eDP or
LVDS signals；The external video signal includes DP/HDMI/DVI/VGA；
3) the GPIO signals control that RTD2556T is exported by external EC realizes the three of mainboard vision signal and external video signal
Select an output；The signal form of output signal is eDP or LVDS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191994.8A CN108429896A (en) | 2018-03-08 | 2018-03-08 | A kind of method of vision signal selection output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191994.8A CN108429896A (en) | 2018-03-08 | 2018-03-08 | A kind of method of vision signal selection output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108429896A true CN108429896A (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810191994.8A Pending CN108429896A (en) | 2018-03-08 | 2018-03-08 | A kind of method of vision signal selection output |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111045489A (en) * | 2019-12-10 | 2020-04-21 | 合肥市卓怡恒通信息安全有限公司 | Loongson platform integrated machine with integrated KVM motherboard |
| CN111459429A (en) * | 2020-03-02 | 2020-07-28 | 北京众达精电科技有限公司 | Display input and output switching system and switching method based on domestic processor |
| CN111813266A (en) * | 2020-07-17 | 2020-10-23 | 山东超越数控电子股份有限公司 | Independently add stationary 4K touch-control display |
| CN115766978A (en) * | 2022-11-11 | 2023-03-07 | 武汉华之洋科技有限公司 | Computer video display and admission integrated display and method |
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| US8196059B2 (en) * | 2007-04-06 | 2012-06-05 | Aten International Co., Ltd. | Switch and on-screen display systems and methods |
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| CN105808191A (en) * | 2016-03-15 | 2016-07-27 | 山东超越数控电子有限公司 | Display conversion method for automatically identifying output channel |
| CN206164756U (en) * | 2016-09-28 | 2017-05-10 | 上海市东方医院 | A medical video switching and playing device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111045489A (en) * | 2019-12-10 | 2020-04-21 | 合肥市卓怡恒通信息安全有限公司 | Loongson platform integrated machine with integrated KVM motherboard |
| CN111459429A (en) * | 2020-03-02 | 2020-07-28 | 北京众达精电科技有限公司 | Display input and output switching system and switching method based on domestic processor |
| CN111813266A (en) * | 2020-07-17 | 2020-10-23 | 山东超越数控电子股份有限公司 | Independently add stationary 4K touch-control display |
| CN111813266B (en) * | 2020-07-17 | 2022-03-15 | 超越科技股份有限公司 | Independently add stationary 4K touch-control display |
| CN115766978A (en) * | 2022-11-11 | 2023-03-07 | 武汉华之洋科技有限公司 | Computer video display and admission integrated display and method |
| CN115766978B (en) * | 2022-11-11 | 2025-06-24 | 武汉华之洋科技有限公司 | Computer video display and recording integrated display and method |
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Application publication date: 20180821 |
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| WD01 | Invention patent application deemed withdrawn after publication |