Multi-information source switching control system of presentation terminal
A conversion control and signal conversion technology, applied in signal transmission systems, non-electrical signal transmission systems, TV system components, etc., can solve problems such as inconvenient use, many demonstration terminals, incompatibility of multimedia signals, etc., and achieve compatibility high effect
Inactive Publication Date: 2012-10-10
广东佳的美智能科技有限公司
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Problems solved by technology
[0002] There are many existing electronic display products. For example, in a shopping mall, it is necessary to display the display effect of the TV set-top box, the display effect of the DVD player, the display effect of the computer, and the display effect of the LCD TV. These electronic display products have different interfaces. And the program encoding format, a display screen is not compatible with different input multimedia signals, and different display devices need to be configured separately, which leads to many demonstration terminals and is inconvenient to use
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[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0020] Such as figure 1 As shown, the embodiment of the present invention is a multi-channel signal source conversion control system for a demonstration terminal, including an interconnected power supply device circuit board (i.e. PCBA 1), a multimedia signal conversion control circuit board (i.e. PCBA 2) and a signal source control circuit board (i.e. PCBA 3); wherein the power supply device circuit board can convert 220V or 110V AC, output two 220V AC and three 5V DC outputs to external digital products, and also provide a 5V DC power supply for the multimedia Signal conversion control circuit board and signal source control circuit board.
[0021] Such as figure 2 As shown, the multimedia signal conversion control circuit board includes a main control chip c...
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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 ofswitching 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 [0001] The invention relates to the field of electronic display control and a multi-channel signal source conversion control system with a demonstration terminal. Background technique [0002] There are many existing electronic display products. For example, in a shopping mall, it is necessary to display the display effect of the TV set-top box, the display effect of the DVD player, the display effect of the computer, and the display effect of the LCD TV. These electronic display products have different interfaces. And the program encoding format, a display screen is not compatible with different input multimedia signals, and different display devices must be configured respectively, which leads to many demonstration terminals and is inconvenient to use. [0003] Therefore, a multi-channel signal source conversion control system for a demonstration terminal is currently needed to simultaneously test set-top boxes, DVDs, LCD TVs, TV boxes, and PMP digital audi...
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IPC IPC(8): G09G5/00H04N5/765G08C23/04
Inventor 莫经科王玉张志华
Owner 广东佳的美智能科技有限公司