CN201571142U - Signal switching circuit and television set test circuit - Google Patents
Signal switching circuit and television set test circuit Download PDFInfo
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- CN201571142U CN201571142U CN2010200013121U CN201020001312U CN201571142U CN 201571142 U CN201571142 U CN 201571142U CN 2010200013121 U CN2010200013121 U CN 2010200013121U CN 201020001312 U CN201020001312 U CN 201020001312U CN 201571142 U CN201571142 U CN 201571142U
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Abstract
The embodiment of the utility model discloses a signal switching circuit and a television set test circuit, which belong to electronic technology field. The object of the utility model is to resolve problems of complex structure and low reliability of the existing signal switching circuit. The signal switching circuit of the utility model includes at least two video signal input ends, a signal selection device and a video signal output end, wherein the signal selection device is used for receiving video signals through the video signal input ends, selecting/amplifying the video signals from one or more video signal input ends according to user input control command, and outputting the selected and amplified video signals through the video signal output end. The television set test circuit includes the signal switching circuit of the utility model. The utility model are used for selecting and switching video signals.
Description
Technical field
The utility model belongs to electronic technology field, is specifically related to a kind of multiple signals choosing and cuts circuit and be provided with the tv test circuit that circuit is cut in this multiple signals choosing.
Background technology
Along with the continuous development of electronic technology, television set has become one of household electrical appliance the most common in people's daily life.
After various functional modules on the circuit board in the television set or function element assemble, need test, just can dispatch from the factory after the test passes circuit board.In the prior art owing to be used for the involving great expense of testing apparatus (or claiming testing equipment) of the video signal handling ability of various functional modules on the testing circuit board or function element, so when the TV set circuit plate is tested, the shared testing apparatus of circuit board that common polylith need be tested, like this when test, multiple signals choosings just need be set cuts circuit and selects one earlier test between the circuit board that polylith need be tested, after the circuit board testing of selecting finishes earlier, then switch another piece circuit board again and test, until all circuit board testings is intact.
Circuit is cut in existing multiple signals choosing, comprise two-path video signal input part at least, a plurality of alternative video switchs, VT and signal amplification module, wherein: video switch is used for by the video signal input terminal receiving video signals, and the vision signal of selecting road video signal input terminal wherein to import according to the control command of user input, and exporting its selected vision signal to the signal amplification module by VT, the signal amplification module is used for receiving, the vision signal of amplification video signal output output also exports it to testing apparatus.
The inventor finds that there is following problem at least in prior art in realizing process of the present utility model:
The choosing of existing multiple signals is cut circuit a plurality of alternative video switchs and signal amplification module need be set, because it is many that device is set, so the circuit more complicated, be difficult for connecting, easily taking place the problem of circuit connection error, causes reliability poor.
The utility model content
The utility model embodiment provides the choosing of a kind of multiple signals to cut circuit, has solved existing multiple signals choosing and has cut circuit and have circuit more complicated, the poor technical problem of reliability.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
Circuit is cut in this multiple signals choosing, comprises two-path video signal input part, signal selector spare and VT at least, wherein:
Described signal selector spare is used for by described video signal input terminal receiving video signals, and according to the vision signal that the control command of user's input is selected, amplification one or more video signal input terminal is wherein imported, and vision signal it is selected, that amplify is exported by described VT.
Further, described signal selector spare is the video switch switch chip.
Further, described signal selector spare is the MAX family chip.
Further, described signal selector spare be at least 2 times to a described vision signal energy amplification multiple.
Further, the level output unit that circuit also comprises industrial computer and links to each other with industrial computer is cut in this multiple signals choosing, wherein:
Described industrial computer is used to receive the control command of user's input, and according to described control command described level output unit is exported control command;
Described level output unit is used to receive described control command, and selects, amplifies and export the vision signal that one or more video signal input terminal is wherein imported according to described control command by the mode of described signal selector spare input high level or low level signal being controlled described signal selector spare.
Further, described level output unit is 51 series monolithics.
Further, the choosing of this multiple signals is cut circuit and is comprised 8 tunnel described video signal input terminals, 1 tunnel described VT.
Further, described signal selector spare also comprises power pins, control pin and grounding pin, and wherein: described power pins links to each other with power supply, is used to described signal selector spare supply electric energy;
Described control pin links to each other with described level output unit, be used to receive the high level or the low level signal of described level output unit output, and select, amplify and export the vision signal that one or more video signal input terminal is wherein imported according to described high level or low level signal;
Described grounding pin ground connection.
Further, described VT links to each other with the Video processing integrated circuit board, and described Video processing integrated circuit board is used to receive, handle the vision signal after described signal selector spare amplifies, and its processed video signal is play by display screen.
Further, described video signal input terminal is that TV SKD is sent with the vision signal that TV SKD links to each other and described video signal input terminal received, the Video processing integrated circuit board that described Video processing integrated circuit board is a television set, described display screen are the display of television set.
This tv test circuit comprises that the multiple signals choosing that above-mentioned the utility model embodiment provided cuts circuit.
Compared with prior art, the utility model provides the arbitrary technical scheme in the technique scheme to have following advantage:
Because the signal selector spare that the utility model embodiment is provided can pass through the video signal input terminal receiving video signals, and according to the vision signal that the control command of user's input is selected, amplification one or more video signal input terminal is wherein imported, and vision signal it is selected, that amplify is exported by VT.As seen, the utility model only need be provided with a signal selector spare, just can realize all functions that a plurality of alternative video switchs set in the prior art and signal amplification module can be realized, because it is fewer that device is set, so fairly simple, the easy connection of circuit, the difficult problem that circuit connection error takes place, the reliability of entire circuit is also relatively good, cuts circuit and has circuit more complicated, the poor technical problem of reliability so solved the choosing of existing multiple signals.
Description of drawings
Fig. 1 cuts the schematic diagram of circuit inner structure for the multiple signals choosing that embodiment of the present utility model provided;
Fig. 2 cuts the schematic diagram of a kind of execution mode of circuit for the multiple signals choosing that embodiment of the present utility model provided;
Fig. 3 cuts the schematic diagram of signal selector spare in the circuit for the multiple signals choosing that embodiment of the present utility model provided.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described in detail.
The utility model embodiment provide a kind of use device few, connect the reasonable multiple signals choosing of simple and reliable property and cut circuit and be provided with the tv test circuit that circuit is cut in this multiple signals choosing.
As shown in Figure 1, circuit is cut in the multiple signals choosing that the utility model embodiment is provided, comprise two-path video signal input part 1, signal selector spare 2 and VT 3 at least, wherein: signal selector spare 2 is used for by video signal input terminal 1 receiving video signals, and according to the vision signal that the control command of user's input is selected, amplification one or more video signal input terminal 1 is wherein imported, and vision signal it is selected, that amplify is passed through VT 3 outputs.
Because the signal selector spare 2 that the utility model embodiment is provided can pass through video signal input terminal 1 receiving video signals, and according to the vision signal that the control command of user's input is selected, amplification one or more video signal input terminal 1 is wherein imported, and vision signal it is selected, that amplify is passed through VT 3 outputs.As seen, the utility model only need be provided with a signal selector spare 2, just can realize all functions that a plurality of alternative video switchs set in the prior art and signal amplification module can be realized, because it is fewer that device is set, so fairly simple, the easy connection of circuit, the difficult problem that circuit connection error takes place, the reliability of entire circuit is also relatively good, cuts circuit and has circuit more complicated, the poor technical problem of reliability so solved the choosing of existing multiple signals.
2 pairs of vision signal institutes of signal selector spare can amplification multiple be at least 2 times.Generally, the vision signal that video signal input terminal 1 is received can drive the testing apparatus display image after being amplified to 2 times.
As shown in Figure 2, video signal input terminal 1 is that TV SKD 8 is sent with the vision signal that TV SKD 8 links to each other and video signal input terminal 1 is received in the present embodiment, Video processing integrated circuit board 6 is the Video processing integrated circuit board of television set in the present embodiment, and display screen 7 is the display of television set.The vision signal that 8 pairs of video signal input terminals 1 of TV SKD send is amplified to, and just can to drive display screen 7 after 2 times be that the display of television set shows.
Multiple signals choosings is cut circuit and is also comprised industrial computer 4 (Industrial Personal Computer in the present embodiment, IPC) and the level output unit 5 that links to each other with industrial computer 4, wherein: industrial computer 4 is used to receive the control command of user's input, and according to control command level output unit 5 is exported control commands;
Single-chip microcomputer is 51 series monolithics.51 series monolithics are that a kind of data-handling capacity is more intense, the single-chip microcomputer of technology maturation and stable performance, and are suitable to level output unit 5.Certainly, the chip that level output unit 5 also can adopt other single-chip microcomputers outside 51 series monolithics or have similar functions in the present embodiment.
The choosing of this multiple signals cut circuit comprise 8 road video signal input terminals 1 as shown in Figure 2 promptly as shown in Figure 3 IN0, IN1, IN2, IN3, IN4......IN7 pin and 1 tunnel VT 3 be the OUT pin.8 road video signal input terminals 1 can connect 8 different functional modules or circuit board, and 1 tunnel VT 3 only needs to connect a testing apparatus, the device of use test so fully.Certainly, the choosing of this multiple signals is cut circuit and also can be comprised the more video signal input terminal 1 of multichannel.
Signal selector spare 2 also comprises as shown in Figure 3 power pins Vcc, control pin SHDN and grounding pin in the present embodiment, and wherein: power pins Vcc links to each other with power supply, is used to signal selector spare 2 supply electric energy; Control pin SHDN links to each other with level output unit 5, be used for high level or low level signal that incoming level output unit 5 is exported, and select, amplify and export the vision signal that one or more video signal input terminal 1 is wherein imported according to high level or low level signal; Grounding pin ground connection.
Power pins power supply that Vcc connects is 5V in the present embodiment.Grounding pin is provided with two, and one of them grounding pin GND can carry out ground protection to signal selector spare 2, and another grounding pin VEE provides reference potential for high level or low level signal.
The tv test circuit that the utility model embodiment is provided comprises that the multiple signals choosing that above-mentioned the utility model embodiment provided cuts circuit.
Cut the identical technical characterictic of circuit because the multiple signals choosing that is provided with above-mentioned the utility model embodiment is provided the utility model embodiment tv test circuit, so both not only have unicity but also can also produce identical technique effect, solve identical technical problem.
The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (10)
1. circuit is cut in a multiple signals choosing, it is characterized in that: comprise two-path video signal input part, signal selector spare and VT at least, wherein:
Described signal selector spare is used for by described video signal input terminal receiving video signals, and according to the vision signal that the control command of user's input is selected, amplification one or more video signal input terminal is wherein imported, and vision signal it is selected, that amplify is exported by described VT.
2. circuit is cut in multiple signals choosing according to claim 1, and it is characterized in that: described signal selector spare is the video switch switch chip.
3. circuit is cut in multiple signals choosing according to claim 2, and it is characterized in that: described signal selector spare is the MAX family chip.
4. circuit is cut in multiple signals choosing according to claim 3, it is characterized in that: described signal selector spare be at least 2 times to a described vision signal energy amplification multiple.
5. plurality of voltages commutation circuit according to claim 1 is characterized in that: the level output unit that circuit also comprises industrial computer and links to each other with industrial computer is cut in this multiple signals choosing, wherein:
Described industrial computer is used to receive the control command of user's input, and according to described control command described level output unit is exported control command;
Described level output unit is used to receive described control command, and selects, amplifies and export the vision signal that one or more video signal input terminal is wherein imported according to described control command by the mode of described signal selector spare input high level or low level signal being controlled described signal selector spare.
6. plurality of voltages commutation circuit according to claim 5, it is characterized in that: described signal selector spare also comprises power pins, control pin and grounding pin, wherein: described power pins links to each other with power supply, is used to described signal selector spare supply electric energy;
Described control pin links to each other with described level output unit, be used to receive the high level or the low level signal of described level output unit output, and select, amplify and export the vision signal that one or more video signal input terminal is wherein imported according to described high level or low level signal;
Described grounding pin ground connection.
7. circuit is cut in multiple signals choosing according to claim 5, and it is characterized in that: described level output unit is 51 series monolithics.
8. circuit is cut in multiple signals choosing according to claim 1, it is characterized in that: this multiple signals choosing is cut circuit and is comprised 8 tunnel described video signal input terminals, 1 tunnel described VT.
9. circuit is cut in multiple signals choosing according to claim 8, and it is characterized in that: the Video processing integrated circuit board that described Video processing integrated circuit board is a television set, described display screen are the display of television set.
10. tv test circuit is characterized in that: comprise that the arbitrary described multiple signals choosing of claim 1 to 9 cuts circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200013121U CN201571142U (en) | 2010-01-04 | 2010-01-04 | Signal switching circuit and television set test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200013121U CN201571142U (en) | 2010-01-04 | 2010-01-04 | Signal switching circuit and television set test circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201571142U true CN201571142U (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200013121U Expired - Fee Related CN201571142U (en) | 2010-01-04 | 2010-01-04 | Signal switching circuit and television set test circuit |
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| CN (1) | CN201571142U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647907A (en) * | 2013-08-15 | 2014-03-19 | 中国航天空气动力技术研究院 | Unmanned aerial vehicle multiplex video switching device |
| CN104459427A (en) * | 2013-09-23 | 2015-03-25 | 鸿富锦精密电子(天津)有限公司 | Automatic testing device for two VGA interfaces |
| CN108414918A (en) * | 2018-02-26 | 2018-08-17 | 深圳市华星光电技术有限公司 | Device for testing compatibility and method |
| CN114927114A (en) * | 2022-06-29 | 2022-08-19 | 高创(苏州)电子有限公司 | Display device input circuit, display device and control method thereof |
-
2010
- 2010-01-04 CN CN2010200013121U patent/CN201571142U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647907A (en) * | 2013-08-15 | 2014-03-19 | 中国航天空气动力技术研究院 | Unmanned aerial vehicle multiplex video switching device |
| CN103647907B (en) * | 2013-08-15 | 2016-12-28 | 中国航天空气动力技术研究院 | A kind of unmanned plane multi-channel video switch |
| CN104459427A (en) * | 2013-09-23 | 2015-03-25 | 鸿富锦精密电子(天津)有限公司 | Automatic testing device for two VGA interfaces |
| CN108414918A (en) * | 2018-02-26 | 2018-08-17 | 深圳市华星光电技术有限公司 | Device for testing compatibility and method |
| CN114927114A (en) * | 2022-06-29 | 2022-08-19 | 高创(苏州)电子有限公司 | Display device input circuit, display device and control method thereof |
| CN114927114B (en) * | 2022-06-29 | 2024-04-09 | 高创(苏州)电子有限公司 | Display device input circuit, display device and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100901 Termination date: 20130104 |