CN101894537A - Multi-information source switching control system of presentation terminal - Google Patents
Multi-information source switching control system of presentation terminal Download PDFInfo
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- CN101894537A CN101894537A CN 201010214983 CN201010214983A CN101894537A CN 101894537 A CN101894537 A CN 101894537A CN 201010214983 CN201010214983 CN 201010214983 CN 201010214983 A CN201010214983 A CN 201010214983A CN 101894537 A CN101894537 A CN 101894537A
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Abstract
The invention discloses a multi-information source switching control system of a presentation terminal, which comprises a power supply device circuit board, a plurality of multimedia signal switching control circuit boards and a signal source control circuit board, which are connected together, wherein each multimedia signal switching control circuit board comprises a main control chip capable of switching different multimedia signal formats and codes, signal switching control buttons, a plurality of signal source input ports and a VGA signal source output port; the signal source control circuit board comprises a plurality of video decoding chips which are connected with corresponding modulators and output ports through data wires; and the video decoding chips convert information source signals into cable television broadcast signals by reading audios and videos and image files stored in respective N-flash storage chips, or an external storage device connected with an USB or an SD card inserted into an SD card holder and by corresponding modulator processing, output the cable television broadcast signals and provide PC input signals for the multimedia signal switching control circuit board.
Description
Technical field
The present invention relates to electronics and show the control field, and the multi-information source switching control system with presentation terminal.
Background technology
Existing electronics shows that product is a lot, such as in the market, need to show the display effect of TV set-top box, show the display effect of DVD player, show the display effect of computer, the display effect of showing LCD TV, these electronics show that product has different interfaces and program coded format, and a display screen can not be compatible to the different multimedia signal of input, dispose different display device respectively, cause presentation terminal a lot of like this, use inconvenient.
So need the multi-information source switching control system of a presentation terminal at present, by the Digital A series products of a display screen while test machine top box, DVD, LCD TV, TV box, many kinds of different ports of PMP, convenient results of broadcast of showing different demonstration products.
Summary of the invention
The invention provides the multi-information source switching control system of presentation terminal, have the compatible characteristics of playing multiple audio-video signal, and can provide simulation signal generator being difficult for obtaining under the situation of signal source, show the different results of broadcast that show products by a display screen is convenient.
The invention provides a kind of multi-information source switching control system of presentation terminal, comprise the electric supply installation circuit board, multi-media signal conversion control circuit plate, the signal source control circuit board that are connected to each other communication;
Wherein said multi-media signal conversion control circuit plate comprises main control chip, the conversion of signals control button that can change different multimedia signal format and coding, a plurality of signal source input ports are arranged on the described main control chip, and connect display by VGA signal source output port;
Described signal source control circuit board comprises a plurality of video decoding chips that work alone, and connects corresponding modulators and output port by data line respectively, and a plurality of described video decoding chips all also are connected with RAM (random access memory) card and miniUSB interface.
In described multi-media signal conversion control circuit plate, described signal source input port is six kinds of signal input ports, is respectively AV1, AV2, YUV, PC, VGA RGB1, VGA RGB2 signal input port.
Further, in described multi-media signal conversion control circuit plate, described main control chip is the video signal format conversion chip, by described conversion of signals control button switching controls, respectively different described signal source input signals is handled, unification converts the VGA signal to and exports to display screen.Also be provided with an infrared remote control receiver module that is used to receive changeover control signal on the described main control chip.
Further, three described video decoding chip A, B, C that work alone are arranged in described signal source control circuit board, wherein said video decoding chip A, B also are provided with SD deck interface; Described video decoding chip is by reading in the RAM (random access memory) card separately or in the SD card or audio-video document or picture in the mobile memory that connects of miniUSB interface, described audio-video document or picture are handled through corresponding described modulator as the source signal of input, and the analog catv broadcast singal that converts different channel to is exported to the PC input port of described multi-media signal conversion control circuit plate.
Further, three described video decoding chip A, corresponding respectively three modulator A, B, the C of connecting of B, C, the output terminal of three described modulator A, B, C also all is connected with IEC female stand, and offers described multi-media signal conversion control circuit plate TV programme input signal.
Further, the road output terminal of described modulator A connects described modulator B by frequency mixer, the road output terminal of described modulator B connects described modulator C by frequency mixer, described modulator C is divided into the analog catv signal of three different channels by two one-to-two signal distributors with three road analog catv signals, and passes through three IEC female stands outputs.
Further again, described electric supply installation circuit board can be changed 220V or 110V alternating current, output two-way 220V alternating current output and three road 5V direct currents are exported to external digital product and are used, and one road 5V direct-current power supply described multi-media signal conversion control circuit plate and signal source control circuit board is provided.
Adopt the multi-information source switching control system of presentation terminal provided by the invention, compatible high, intelligent control, can be with display screen Digital A series products of multiple different ports such as test machine top box, DVD, LCD TV, TV box, PMP simultaneously, and can provide simulation signal generator being difficult for obtaining under the situation of signal source, such as cable TV signal, MP3 format sound signal etc.,, be not subjected to condition restriction whenever and wherever possible as long as just allow product have power supply to demonstrate.
The multi-information source switching control system of described presentation terminal can mainly be made up of three PCBA circuit boards, and the integrated level height reduces small product size, greatly reduces cost.
Description of drawings
Fig. 1 is the multi-information source switching control system block diagram of the presentation terminal that provides of the embodiment of the invention.
Fig. 2 is that the embodiment of the invention provides multi-media signal conversion control circuit plate structure block scheme.
Fig. 3 is the signal source control circuit board block diagram that the embodiment of the invention provides.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, the multi-information source switching control system of a kind of presentation terminal of the embodiment of the invention comprises interconnected electric supply installation circuit board (being PCBA one), multi-media signal conversion control circuit plate (being PCBA two) and signal source control circuit board (being PCBA three); Wherein said electric supply installation circuit board can be changed 220V or 110V alternating current, output two-way 220V alternating current and three road 5V direct currents are exported to external digital product, and one road 5V direct-current power supply described multi-media signal conversion control circuit plate and signal source control circuit board is provided.
As shown in Figure 2, described multi-media signal conversion control circuit plate comprises main control chip, the conversion of signals control button that can change different multimedia signal format and coding, a plurality of signal source input ports are arranged on the described main control chip, and connect display by VGA signal source output port.Such as described signal source input port is six kinds of signal input ports, is respectively AV1, AV2, YUV, PC, VGA RGB1, VGA RGB2 signal input port.In described multi-media signal conversion control circuit plate, described main control chip is the video signal format conversion chip, by described conversion of signals control button switching controls, respectively different described signal source input signals to be handled, unification converts the VGA signal to and exports to display screen.The also described signal source control circuit board work of may command of described main control chip simultaneously.
As shown in Figure 3, three described video decoding chip A, B, C that work alone are arranged in described signal source control circuit board, connect corresponding modulators A, B, C and output port by data line respectively, three described video decoding chips all also are connected with RAM (random access memory) card and miniUSB interface.Wherein said video decoding chip A, B also are provided with SD deck interface.Concrete, described video decoding chip A, B, C are respectively three video decoding chips that work alone, and each all has miniUSB interface and RAM (random access memory) card N_flash, and wherein said digital album (digital photo frame) chip A, B also are provided with the SD deck interface of the SD card of can pegging graft.Each video decoding chip can read the video file that it has in it controls oneself the RAM (random access memory) card N_flash that has like this, or by the audio-video document in the mobile memory of miniUSB interface connection, the video decodes of two band SD deck interfaces wherein, promptly described digital album (digital photo frame) chip A, B can also read the content of SD card the inside by SD deck interface.
Three video decoding chips by read in the RAM (random access memory) card separately or mobile memory that the miniUSB interface connects in audio-video document or picture, or be inserted in audio frequency and video or the picture file that stores in the SD card of SD deck, output audio-video signal separately, looking signal because of this three road sound is to be got by the file in three video decode cores and the storage medium separately, so produce three tunnel different signal sources, this three road audio-video signal is sent corresponding three modulator A that connect respectively to, B, C, each modulator all is modulated into the analog catv signal to the audio-video signal of coming in, by of the control of external described main control chip to modulator, three analog catv signals that come out by modulator are modulated into three different channel analog catv signals, such three analog catv signals are blended in same channel transfer by mixing, and three different channel signals are just arranged on same passage this moment.Output terminal at described digital album (digital photo frame) chip C, wired anolog TV signals of three channels are told three tunnel analog catv signals that all have three channels by two one-to-two signal distributors, each road connects the female stand of an IEC respectively, the female stand of such three IEC all has the analog catv signal of three channels to export to the PC input port of described multi-media signal conversion control circuit plate, for the product use of band anolog TV signals receiving function.
Adopt the multi-information source switching control system of presentation terminal provided by the invention, can be with display screen Digital A series products of multiple different ports such as test machine top box, DVD, LCD TV, TV box, PMP simultaneously, and can provide signal source being difficult for obtaining under the situation of signal source, such as cable TV signal, MP3 format sound signal etc., as long as allow product have power supply just can demonstrate whenever and wherever possible, be not subjected to condition restriction.
The multi-information source switching control system of described presentation terminal can mainly be made up of three PCBA circuit boards, and the integrated level height is compatible good, reduces small product size, greatly reduces cost.
Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make some improvement and change, these improvement and change also are considered as protection scope of the present invention.
Claims (8)
1. the multi-information source switching control system of a presentation terminal is characterized in that, comprises the electric supply installation circuit board, multi-media signal conversion control circuit plate, the signal source control circuit board that are connected to each other communication;
Wherein said multi-media signal conversion control circuit plate comprises main control chip, the conversion of signals control button that can change different multimedia signal format and coding, a plurality of signal source input ports are arranged on the described main control chip, and connect display by VGA signal source output port;
Described signal source control circuit board comprises a plurality of video decoding chips that work alone, and connects corresponding modulators and output port by data line respectively, and a plurality of described video decoding chips all also are connected with RAM (random access memory) card and miniUSB interface.
2. according to the multi-information source switching control system of the described presentation terminal of claim 1, it is characterized in that, in described multi-media signal conversion control circuit plate, described signal source input port is six kinds of signal input ports, is respectively AV1, AV2, YUV, PC, VGA RGB1, VGA RGB2 signal input port.
3. according to the multi-information source switching control system of claim 1 or 2 described presentation terminals, it is characterized in that, in described multi-media signal conversion control circuit plate, described main control chip is the video signal format conversion chip, by described conversion of signals control button switching controls, respectively different described signal source input signals is handled, unification converts the VGA signal to and exports to display screen.
4. according to the multi-information source switching control system of the described presentation terminal of claim 1, it is characterized in that, three video decoding chip A, B, C that work alone are arranged in described signal source control circuit board, and wherein said video decoding chip A, B also are provided with SD deck interface; Described video decoding chip is by reading in the RAM (random access memory) card separately or in the SD card or audio-video document or picture in the mobile memory that connects of miniUSB interface, with described audio-video document or picture source signal as input, handle through corresponding described modulator, the analog catv broadcast singal that converts different channel to is exported to the PC input port of described multi-media signal conversion control circuit plate.
5. according to the multi-information source switching control system of the described presentation terminal of claim 4, it is characterized in that, three described video decoding chip A, corresponding respectively three modulator A, B, the C of connecting of B, C, the output terminal of three described modulator A, B, C also all is connected with IEC female stand, and offers described multi-media signal conversion control circuit plate TV programme input signal.
6. according to the multi-information source switching control system of claim 4 or 5 described presentation terminals, it is characterized in that, the road output terminal of described modulator A connects described modulator B by frequency mixer, the road output terminal of described modulator B connects described modulator C by frequency mixer, described modulator C is divided into the analog catv signal of three different channels by two one-to-two signal distributors with three road analog catv signals, and passes through three IEC female stands outputs.
7. according to the multi-information source switching control system of the described presentation terminal of claim 1, it is characterized in that, described electric supply installation circuit board can be changed 220V or 110V alternating current, output two-way 220V alternating current output and three road 5V direct currents are exported to external digital product and are used, and one road 5V direct-current power supply described multi-media signal conversion control circuit plate and signal source control circuit board is provided.
8. according to the multi-information source switching control system of the described presentation terminal of claim 1, it is characterized in that, also be provided with an infrared remote control receiver module that is used to receive changeover control signal on the described main control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010214983A CN101894537B (en) | 2010-06-30 | 2010-06-30 | Multi-information source switching control system of presentation terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010214983A CN101894537B (en) | 2010-06-30 | 2010-06-30 | Multi-information source switching control system of presentation terminal |
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| CN101894537A true CN101894537A (en) | 2010-11-24 |
| CN101894537B CN101894537B (en) | 2012-10-10 |
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| CN201010214983A Expired - Fee Related CN101894537B (en) | 2010-06-30 | 2010-06-30 | Multi-information source switching control system of presentation terminal |
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| CN103219625A (en) * | 2012-01-20 | 2013-07-24 | 北京凯新创达科技发展有限公司 | HDMI and control signal super single network cable extender |
| CN103338399A (en) * | 2013-06-17 | 2013-10-02 | 无锡德思普科技有限公司 | TV box compatible with set-top box and working method thereof |
| CN106792083A (en) * | 2016-12-09 | 2017-05-31 | 深圳Tcl数字技术有限公司 | Picture quality of television demenstration method and system |
| CN107608280A (en) * | 2017-11-03 | 2018-01-19 | 深圳市康冠商用科技有限公司 | Multiple source usb circuit |
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| CN107608280A (en) * | 2017-11-03 | 2018-01-19 | 深圳市康冠商用科技有限公司 | Multiple source usb circuit |
| CN107608280B (en) * | 2017-11-03 | 2024-05-03 | 深圳市康冠商用科技有限公司 | Multi-source USB interface circuit |
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| Publication number | Publication date |
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| CN101894537B (en) | 2012-10-10 |
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Effective date of registration: 20180124 Address after: B 511542 workshop in Guangdong province Qingyuan city Yinzhan forest Youtu Road No. 1 Qingyuan Gadmei Electronic Technology Co. Ltd. Patentee after: Guangdong Gadmei Intelligent Technology Co., Ltd. Address before: 511542 Guangdong province Qingyuan City silver lamp forest Patentee before: Gadmei Electronics Techonlogy Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20200630 |