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Television set video frequency terminal port recognizing and on-off checking method

A port identification and detection method technology, applied in the field of television, can solve the problems of inconvenience and cumbersome video port operation, and achieve the effect of simplifying operation and conveniently connecting multiple external video ports

Inactive Publication Date: 2008-08-27
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a TV video port identification and switch machine detection method for the cumbersome and inconvenient operation of the user to control and switch between different video ports when the TV is connected to multiple video ports

Method used

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  • Television set video frequency terminal port recognizing and on-off checking method

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Embodiment Construction

[0013] The present invention will be further described below in combination with specific embodiments and accompanying drawings.

[0014] Such as figure 1 As shown, the workflow for implementing the present invention is described by taking a CRT TV set externally connected to a DVB, DVD, etc. as an example. After the CRT TV is turned on, the CPU internal register of the CRT TV continuously scans the video ports such as AV, YPbPr, YCbCr, and VGA to detect whether each video port has a synchronous signal. If a synchronous signal is detected, the CPU internal register of the CRT TV Register saves a flag bit, carries out register flag bit locking, thereby confirms whether each video port has synchronous signal by judging the height of CPU internal register flag bit, if described flag bit is high, then this video port has synchronous signal; If described If the flag bit is low, the video port has no sync signal. When it is determined that a certain video port has a synchronous si...

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PUM

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Abstract

The invention relates to a television, in particular to a television video port identification and switch detection method for facilitating the user to control and switch different video ports. Aiming at the problem that the operations for the user to control and switch different video ports are complicated and inconvenient when the television is externally connected with a plurality of video ports, the invention discloses a television video port identification and switch detection method. The method includes the following steps: 1, detecting each video port and judge if synchronous signals are existed, if the judging result is yes go to step 2 and if the judging result is no go to step 3; 2, the television is started up to the video port with signals if the television is in the stand-by state, identifies video signals and is switched to the video port with signals if the television is on; 3, the television is in stand-by state in a certain time. The invention which is applied for televisions has the advantages that the method simplifies the operations that the user controls and switches different video ports and facilitates the user to use the plurality of external video ports of the television.

Description

technical field [0001] The invention relates to a television set, in particular to a video port identification and on / off detection method of a television set externally connected with multiple video ports. Background technique [0002] With the continuous development of TV technology, various technologies and products have appeared accordingly. Generally, users have DVD, DVB and other players connected to the TV at home, which requires the use of multiple remote controls at the same time. Switch the machine on or off or switch the video port with signal. With the gradual popularization of digital TV, the TV is connected with multiple video ports, such as AV, YPbPr, YCbCr, VGA and so on. When the user is in use, each time a plurality of remote controllers are used to respectively control and switch different video ports, which makes the user cumbersome and extremely inconvenient to use. Contents of the invention [0003] The technical problem to be solved by the present ...

Claims

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Application Information

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IPC IPC(8): H04N5/00H04N5/765
Inventor 周国立
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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