CN101074976B - Method and apparatus for inspecting connection status between display device and peripheral equipment - Google Patents
Method and apparatus for inspecting connection status between display device and peripheral equipment Download PDFInfo
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- CN101074976B CN101074976B CN2006100607113A CN200610060711A CN101074976B CN 101074976 B CN101074976 B CN 101074976B CN 2006100607113 A CN2006100607113 A CN 2006100607113A CN 200610060711 A CN200610060711 A CN 200610060711A CN 101074976 B CN101074976 B CN 101074976B
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- 238000000034 method Methods 0.000 title claims description 9
- 230000002093 peripheral effect Effects 0.000 title 1
- 238000001514 detection method Methods 0.000 claims description 8
- 230000000052 comparative effect Effects 0.000 claims description 7
- 239000003086 colorant Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 3
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4072—Drivers or receivers
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Abstract
A device used for detecting connection state between display unit and externally connected unit consists of input port of display unit, microprocessor MCU and impedance detector connected with said input port. It is featured as using said impedance detector to detect impedance value of said input port and using said MCU to judge connection state between display unit and externally connected unit according to detected impedance value.
Description
Technical field
The present invention relates to multimedia technology, specifically, relate to display device and the audio frequency and video input equipment UNICOM status detection technology of detecting.
Background technology
Along with Development of Multimedia Technology, the external equipment of various display devices is more and more, and often being connected between display device and the external equipment links to each other by signal wire, and like this, the input port of display device is more and more.
With the televisor is example, and many families also utilize audio/video programs such as its play CD, VCD, DVD except with the televisor TV reception, and therefore, televisor generally all has more than 10 RCA port for the usefulness that connects these external equipments.Usually, the input port of televisor is arranged in the back of housing of TV set mostly, in order to avoid the signal wire of handle is exposed to and influences impression under spectators' sight line greatly.
Above-mentioned external equipment generally links up by signal wire and televisor, because televisor generally all is to place near wall, even in front of display, also be difficult to see terminal hole and title thereof, particularly wall-hanging flat panel TV, television rear shell and between the walls slit are very little after installing, and the CRT televisor also is difficult to see because weight is not easy greatly to move.In this case, it is very difficult all correctly being inserted into corresponding port to each audio-video signal line, sometimes need signal wire is inserted Wiring port one by one, whether the test signal of starting shooting then line inserts correct port, and this mode wastes time and energy very much.
Up to now, start with from the angle of input and to solve problem, all there is research in domestic and international many companies, have proposed various solutions.In the prior art, there is a kind of employing that having or not of audio-video signal judged in the audio-video signal detection of input, perhaps by the synchronizing signal in the vision signal being detected the technical scheme that has or not of judging vision signal.
Also having some other detection method in the prior art all is to adopt the mode that signal itself is detected, and the prerequisite that these schemes realize is must need signal to appear at input end.If signal input device causes not having signal to occur because of power switch is in off-state, above-mentioned scheme can't realize.
If the power supply of external equipment is opened always, will there be unsafe factor in the user when connecting televisor and above-mentioned external equipment.
Summary of the invention
The object of the present invention is to provide a kind of method and device that detects the connection status between display device and the external equipment, to solve the problem that display device is connected with external equipment of user's simple and fast.
For achieving the above object, the present invention adopts following technical scheme: a kind of device that detects the connection status between display device and the external equipment, and described device comprises: the input port of display device, microprocessor MCU, described device also comprises:
The impedance detector that is connected with described input port, be used for detecting the resistance value of input port and judge the connection status of described display device and described external equipment by described MCU in view of the above, described impedance detection implement body comprises: sensed signal sources, electronic switch and comparer, wherein
The input end of described electronic switch is connected to the input port of described display device, output terminal is connected to the output terminal of described sensed signal sources, the control end of electronic switch is connected to described MCU, is used under the control of MCU described input port being detected automatically;
Described comparator input terminal is connected to the output terminal of described electronic switch, output terminal is connected to described MCU, be used for detected resistance value and the resistance value of being scheduled to being compared and comparative result being fed back to described MCU, be specially, because the access of input equipment, obvious variation can appear in the total load of sensed signal sources, thereby cause that the voltage that is input to comparer obviously reduces, cause the output level of comparer to overturn, whether MCU can judgment device connect in view of the above, and on screen, show the cue of whether connecting according to judged result by described MCU, and whether connect correct cue, be specially when external equipment is connected with display device, will on screen, demonstrate the floor plan of terminal strip, represent the different connection status of input terminal then with different colours.
Wherein said impedance detector is connected with a plurality of described input ports by multiselect one switch.
Wherein said impedance detection implement body comprises: sensed signal sources, electronic switch and comparer, wherein,
The input end of wherein said electronic switch is connected to the input port of described display device, output terminal is connected to the output terminal of described sensed signal sources, the control end of electronic switch is connected to described MCU, is used under the control of MCU described input port being detected automatically;
Wherein said comparator input terminal is connected to the output terminal of described electronic switch, and output terminal is connected to described MCU, is used for detected resistance value and the resistance value of being scheduled to being compared and comparative result being fed back to described MCU.
Wherein said sensed signal sources is a high-resistance power supply.
The invention also discloses a kind of method that detects the connection status between display device and the external equipment, described method comprises following step:
A, display device detects the connection status of judging described display device and external equipment by the impedance to input port, be specially, the impedance detector that is connected with described input port, be used for detecting the resistance value of input port and judge the connection status of described display device and described external equipment by the MCU of display device in view of the above, described impedance detection implement body comprises: sensed signal sources, electronic switch and comparer, because the access of input equipment, obvious variation can appear in the total load of described sensed signal sources, thereby cause that the voltage that is input to comparer obviously reduces, cause the output level of comparer to overturn, whether the MCU of display device can judgment device connect in view of the above, described impedance detector shows the cue of whether connecting after judging connection status between described display device and the described external equipment on the screen of described display device, and whether connect correct cue, be specially when external equipment is connected with display device, to on screen, demonstrate the floor plan of terminal strip, represent the different connection status of input terminal then with different colours.
Wherein step a specifically comprises:
A1, when the user connects described display device and described external equipment, the MCU of described display device control electronic switch links to each other with described input port successively, impedance detector detects the impedance of described input port successively;
A2, described impedance detector compare the resistance value and the predetermined impedance value of detected described input port, and judge connection status between described display device and the described external equipment according to comparative result.
Wherein also comprise before the step a:
The MCU of described display device distributes an address for each input port.
The present invention overcomes the deficiencies in the prior art, adopt and detect the technical scheme that display device input port resistance value is judged the connection status between display device and the external equipment, make under the situation that external equipment is not started shooting display device also can detect whether correct being connected on the display device of external equipment, and can on screen, show testing result in real time, make things convenient for the display device user to connect display device and external equipment.
Description of drawings
Fig. 1 schematic diagram of the present invention;
The circuit diagram of Fig. 2 embodiment of the invention;
The described synoptic diagram that on display device screen, shows testing result of Fig. 3 embodiment of the invention.
Embodiment
Ultimate principle of the present invention is to judge that whether televisor and external equipment detect by the input impedance to input port in the UNICOM, and the variation by input impedance comes whether UNICOM and showing of judgment device on screen.
Schematic diagram of the present invention as shown in Figure 1, wherein impedance detector links to each other with input port by switch, be used for detecting the resistance value of input port and itself and predetermined impedance value are fed back to the MCU of display device after relatively, MCU shows on display device after judging connection status between display device and the external equipment.
Be elaborated below in conjunction with the drawings and specific embodiments.
Display device in the embodiment of the invention is example with the TV, circuit diagram as shown in Figure 2:
A constant current source (high internal resistance) is set as sensed signal sources in televisor, one 16 is selected an electronic switch, for example CD4067 and a comparer, and do following connection:
Signal end with each audio-video signal input port of televisor, it is the heart yearn of input port, be connected respectively to the input end of electronic switch, the public output of electronic switch is connected to the output terminal of constant current source by a resistance Zd, like this when input equipment is received the input port of televisor, its output impedance has just become the newly-increased load of constant current source, and the total load of constant current source will change because of this UNICOM.
In addition, the control end of electronic switch is connected to the I/O end of MCU, under the control of MCU, electronic switch is connected each input port of televisor successively, so, under the control of MCU, just can the input equipment that be connected on the input port have been detected one by one automatically; Simultaneously, the input end of comparer is connected to the public output of above-mentioned electronic switch and the output terminal of constant current source, output terminal is connected to the I/O end of MCU, comparer will compare from the resistance value and the predetermined impedance value of the display device input port of its input end input, then comparative result is outputed to MCU, MCU judges that according to comparative result display device is whether with on external equipment is connected.
Generally, the input impedance Zi of the video inputs mouth of televisor is 75 Ω, and the video output impedance Zo of input equipment also is 75 Ω; Input impedance Zi 〉=10k the Ω of audio input port, Audio Output impedance Zo≤1k the Ω of input equipment, therefore, because the access of input equipment, obvious variation can appear in the total load of constant current source, thereby cause that the voltage that is input to comparer obviously reduces, cause the output level of comparer to overturn, whether MCU can judgment device connect in view of the above.
Next, MCU is according to judged result display reminding signal on screen, and referring to synoptic diagram as shown in Figure 3, concrete display mode is as follows:
At first, when being connected with televisor, external equipment will on screen, demonstrate the floor plan of terminal strip, as Fig. 3, give the sensation of a visual pattern of user, the different connection status of representing input terminal then with different colours, for example represent to connect with green, orange expression rigidly connects logical recently, the white expression does not connect as yet, and connect (being become orange by white) afterwards at next terminal (if No. 2 terminals of V1 group), the front rigidly connects logical terminal (if No. 1 terminal of V1 group) simultaneously can be by the orange green that becomes.
4 groups of AV terminal are arranged among Fig. 3, and the equipment on the V3 mouth has connected intact, represents with green.The V4 port is at present also empty, represents with white.If an equipment is prepared to be connected on this group terminal of V1 now, and be the signal input that is suitable for the RCA terminal, so, after a signal wire (if Y-signal) connects, corresponding terminal is become orange by white, expression has just been connected, and two other of this group terminal temporarily gone back the still white of access failure simultaneously, and expression waits to connect.
Can also judge the correctness of connection by on screen, showing connection status.The example that is connected to above-mentioned V1 group input terminal, if should receive second signal wire (if G signal) of same group of (V1 group) another one input port has but received on some input ports of other a group (for example next door V2 group), at this moment, MCU checks the respective input mouth of V2 group to be shown as after the address and orangely (because distributed an address in advance each input port, therefore can accomplish this point.), the operator sees that this situation just known " gone to the wrong way door ", should be heavily slotting, and until correct demonstration occurring.
Claims (6)
1. device that detects the connection status between display device and the external equipment, described device comprises: the input port of display device, microprocessor MCU is characterized in that described device also comprises:
The impedance detector that is connected with described input port, be used for detecting the resistance value of input port and judge the connection status of described display device and described external equipment by described MCU in view of the above, described impedance detection implement body comprises: sensed signal sources, electronic switch and comparer, wherein
The input end of described electronic switch is connected to the input port of described display device, output terminal is connected to the output terminal of described sensed signal sources, the control end of electronic switch is connected to described MCU, is used under the control of MCU described input port being detected automatically;
Described comparator input terminal is connected to the output terminal of described electronic switch, output terminal is connected to described MCU, be used for detected resistance value and the resistance value of being scheduled to being compared and comparative result being fed back to described MCU, be specially, because the access of input equipment, obvious variation can appear in the total load of sensed signal sources, thereby cause that the voltage that is input to comparer obviously reduces, cause the output level of comparer to overturn, whether MCU can judgment device connect in view of the above, and on screen, show the cue of whether connecting according to judged result by described MCU, and whether connect correct cue, be specially when external equipment is connected with display device, will on screen, demonstrate the floor plan of terminal strip, represent the different connection status of input terminal then with different colours.
2. device according to claim 1 is characterized in that, described impedance detector is connected with a plurality of described input ports by multiselect one switch.
3. device according to claim 1 is characterized in that, described sensed signal sources is a high-resistance power supply.
4. a method that detects the connection status between display device and the external equipment is characterized in that, described method comprises following step:
A, display device detects the connection status of judging described display device and external equipment by the impedance to input port, be specially, the impedance detector that is connected with described input port, be used for detecting the resistance value of input port and judge the connection status of described display device and described external equipment by the MCU of display device in view of the above, described impedance detection implement body comprises: sensed signal sources, electronic switch and comparer, because the access of input equipment, obvious variation can appear in the total load of described sensed signal sources, thereby cause that the voltage that is input to comparer obviously reduces, cause the output level of comparer to overturn, whether the MCU of display device can judgment device connect in view of the above, described impedance detector shows the cue of whether connecting after judging connection status between described display device and the described external equipment on the screen of described display device, and whether connect correct cue, be specially when external equipment is connected with display device, to on screen, demonstrate the floor plan of terminal strip, represent the different connection status of input terminal then with different colours.
5. method according to claim 4 is characterized in that step a specifically comprises:
A1, when the user connects described display device and described external equipment, the MCU of described display device control electronic switch links to each other with described input port successively, impedance detector detects the impedance of described input port successively;
A2, described impedance detector compare the resistance value and the predetermined impedance value of detected described input port, and judge connection status between described display device and the described external equipment according to comparative result.
6. method according to claim 4 is characterized in that, also comprises before the step a:
The MCU of described display device distributes an address for each input port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100607113A CN101074976B (en) | 2006-05-15 | 2006-05-15 | Method and apparatus for inspecting connection status between display device and peripheral equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100607113A CN101074976B (en) | 2006-05-15 | 2006-05-15 | Method and apparatus for inspecting connection status between display device and peripheral equipment |
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| Publication Number | Publication Date |
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| CN101074976A CN101074976A (en) | 2007-11-21 |
| CN101074976B true CN101074976B (en) | 2011-12-14 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102111589A (en) * | 2009-12-25 | 2011-06-29 | 康佳集团股份有限公司 | Interface connection prompting method, device and television |
| CN102186099A (en) * | 2011-04-29 | 2011-09-14 | 冠捷显示科技（厦门）有限公司 | Method for responding messages of broadcast television |
| CN102970507A (en) * | 2012-11-26 | 2013-03-13 | 深圳Tcl新技术有限公司 | Method and television for realizing correct insertion of signal source terminal |
| CN106416303B (en) * | 2014-05-26 | 2022-07-05 | 雅马哈株式会社 | Connection confirmation system, connection confirmation program, connection confirmation method, and connection detection device |
| CN104503376A (en) * | 2014-11-04 | 2015-04-08 | 北京泺喜文化传媒有限公司 | Robot controller having identification function and identification method of robot controller |
| CN107257533B (en) * | 2017-05-23 | 2020-02-14 | 杭州兆华电子有限公司 | Impedance trigger automatic test method |
| CN109270398B (en) * | 2017-07-18 | 2020-07-28 | 华为技术有限公司 | Method, device and equipment for detecting stable insertion state of plug-in card |
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