Signal detection device of VGA channel

A signal detection and channel technology, applied in the field of televisions, can solve the problems of complexity, high technical difficulty and high processing cost, and achieve the effect of low cost and simple structure

Inactive Publication Date: 2009-11-18
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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Problems solved by technology

However, the above processing methods are costly, complex and technically difficult

Method used

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  • Signal detection device of VGA channel
  • Signal detection device of VGA channel
  • Signal detection device of VGA channel

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Embodiment Construction

[0009] see figure 1 As shown, a signal detection device of a VGA channel of the present invention includes a VGA terminal for connecting an external VGA signal source and receiving a VGA signal, a VGA line synchronization signal processing circuit for converting a VGA line synchronization signal into a VGA detection signal, A VGA field synchronization signal processing circuit for converting the VGA field synchronization signal into a VGA detection signal, and a TV MCU for receiving the VGA detection signal to judge whether there is a VGA signal in the TV VGA channel.

[0010] The 13th and 14th pins of the VGA terminal are respectively the input pins of the horizontal synchronous signal and the vertical synchronous signal of the VGA signal, and are respectively connected with the VGA horizontal synchronous signal processing circuit and the VGA vertical synchronous signal processing circuit. When the VGA channel has signal input, the horizontal synchronous signal VGA_HIN of the...

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Abstract

The invention discloses a signal detection device of a VGA channel, and the signal detection device comprises a television MCU, a VGA terminal for connecting an external VGA signal source and receiving VGA signals, a VGA line synchronous signal processing circuit for converting VGA line synchronous signals to VGA detection signals, and a VGA field synchronous signal processing circuit for converting VGA field synchronous signals to the VGA detection signals, wherein the television MCU is used for receiving the VGA detection signals and judging whether the VGA channel has the VGA signals or not. The signal detection device of the VGA channel has the advantages of simple structure and low cost, and the signal detection device can stably and reliably detect the signal state of the VGA channel of a television and can be applied to a variety of VGA terminal-based application occasions.

Description

【Technical field】 [0001] The invention relates to the technical field of televisions, in particular to a signal detection device for a VGA channel. 【Background technique】 [0002] With the increasing abundance of electronic products, devices with VGA signal output such as computers, set-top boxes, and video-on-demand systems have also entered people's lives. At present, LCD TVs also provide a VGA interface, so that we can connect the above-mentioned electronic devices to the TV. As LCD TVs gradually replace traditional CRT TVs, VGA interfaces are becoming more and more important, especially small-sized LCD TVs such as 22 and 26 are often used as computer monitors by people, and VGA interfaces are especially important. various functions. For example: the user connects the computer to the TV through the VGA interface, so that more people can watch the content of the computer; In order to meet the requirements of various VGA functions, currently TVs mainly use dedicated chip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
Inventor 徐遥令丁国民许福喻晓
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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