Video signal source automatic switching method and television

Abstract

The invention discloses a video signal source automatic switching method, which comprises the following steps that whether access signal wires in a polling list input activity signals or not is monitored; a television video signal source is switched to an access signal wire inputting activity signals; the access signal wire inputting the activity signals are deleted from the polling list. Correspondingly, the invention also provides a television, which comprises a function module capable of executing the functions. The invention provides a method for monitoring the access signal wire inputting the activity signals by using software modules and automatically switching to the latest activity signal accessing access signal wire, the problem of unreasonable video signal source setting of the television according to the priority when hardware is adopted for realizing the automatic video signal source switching is avoided, the complexity of television CPU (central processing unit) peripheral circuits and the design difficulty of a PCB (printed circuit board) are reduced, and the problem that the hardware realization technology can be greatly limited when CPU idle lead pins are fewer is avoided.

Description

technical field [0001] The invention belongs to the technical field of television sets, and in particular relates to a video signal source automatic switching method and a television set. Background technique [0002] With the increase of external devices of the TV, the video input signal sources of the TV are more and more, such as analog signal, digital signal, AV signal, VGA signal, YPBPR signal, HDMI signal input and so on. In the prior art, switching the video signal source input of the TV usually adopts the way of single-key cycle or function menu selection. However, there is a problem of low efficiency in the way of single-key cycle, and the problem of requiring the user to have relevant professional knowledge to find accurately in the way of selection in the function menu. [0003] Due to the defects in the above-mentioned technologies, people subsequently developed a method that mainly uses hardware to automatically switch video signal sources. After the video sign...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for automatically switching video signal sources and a TV set, to solve the problem of unreasonable setting of video signal sources of TVs according to priority and adding circuits when using hardware to realize automatic switching of video signal sources in the prior art It is more difficult to design, increase PCB wiring, and technical implementation. What's more, if the TV CPU has fewer idle pins, the technical implementation will be greatly restricted.

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