Video signal processing circuit of notebook computer

Abstract

The visual signal process circuit of a notebook computer comprises a north bridge chip, visual image interface, visual signal control module, visual signal conversion module, visual signal selection module and south bridge chip, with the digital visual signal send out from the north bridge chip selecting module transmission to LCD through visual signal control module, settling outside equipment generated analog visual signal through visual image interface and control module to transmit to the visual signal conversion module, which converts the analog visual signal to digital visual signal, sending the it to LCD through visual signal selection module with the said south bridge chip controlling the visual signal selection module and visual signal control module working status. It improves the utilization of the notebook LCD.

Description

【Technical field】 [0001] The invention relates to a video signal processing circuit, in particular to a video signal processing circuit applied to a notebook computer. 【Background technique】 [0002] Cathode Ray Tube (CRT) monitors can only receive analog signal input due to design and manufacturing reasons, which requires a graphics card that can output analog signals. The information processed by the graphics card will eventually be output to the monitor. The output interface of the graphics card is the bridge between the computer and the monitor, and it is responsible for outputting corresponding image signals to the monitor. Video Graphics Array (VGA), also called D-Sub interface, is the interface for outputting analog signals on the graphics card. [0003] The notebook computer itself has a liquid crystal display, which can directly receive digital signals, but when connecting with an external display device, the VGA interface is still used. For analog display devices...

AI Technical Summary

Problems solved by technology

[0005] Existing notebook computer video processing circuit 10 can transmit digital video signal to liquid crystal display 14, also can transmit analog video signal to external display device 18 through video graphics interface 16, but can't transmit to external processing equipment such as server etc. The analog video signal can be effectively processed. If the notebook computer can receive the analog video signal input from the outside, and convert the analog video signal into a digital video signal and then transmit it to the LCD display, it will be able to improve the utilization rate of the notebook computer LCD display and make it play a better role. more role

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