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Video signal selective output method

A video signal and selective output technology, which is applied to color TV components, TV system components, TVs, etc., can solve problems such as cost increase, achieve cost savings, and solve the effects of insufficient switching frequency

Inactive Publication Date: 2018-08-21
SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The method for selecting and outputting video signals mentioned above in the prior art has some disadvantages: 1) only two video signals can be switched at most; 2) only LVDS LCD screens can be supported, and eDP LCD screens cannot support due to the switching frequency limitation of the switching chip. ; 3) Due to the need to use one more switch chip, the cost increases

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Embodiment 1

[0018] Such as figure 2 shown.

[0019] A method for selecting and outputting a video signal, comprising the following steps:

[0020] 1) The motherboard PCH outputs the motherboard video signal, and the motherboard video signal is converted into eDP or LVDS signal through the RTD2556T chip; the motherboard video signal includes DP and HDMI;

[0021] 2) external video input external video signal, the external video signal is converted to eDP or LVDS signal through the RTD2556T chip; the external video signal includes DVI;

[0022] 3) The RTD2556T realizes the output of the motherboard video signal and the external video signal through the control of the GPIO signal output by the external EC; the signal form of the output signal is eDP.

Embodiment 2

[0024] The method for selecting the output of the video signal as described in the embodiment, the difference is:

[0025] The motherboard video signal includes VGA; the external video signal includes DP and HDMI; the signal form of the output signal is LVDS.

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Abstract

The invention relates to a video signal selective output method. The method comprises the following steps: outputting a mainboard video signal through a mainboard PCH, and converting the mainboard video signal into an eDP or LVDS signal through a RTD2556T chip; inputting an external video signal into an external video, and converting the external video signal into an eDP or LVDS signal through theRTD2556T chip; and realizing one-out-three output of the mainboard video signal and the external video signal by the RTD2556T through a GPIO signal output by an external EC. Through adoption of the video signal selective output method disclosed by the invention, the implementation scheme of selective output of VGA, DVI, HDMI or DP video input signals can be satisfied without any switch chip; theproblem of insufficient switching frequency of a switch selection chip is solved well; and the cost is lowered.

Description

technical field [0001] The invention relates to a method for selecting and outputting video signals, and belongs to the technical field of KVM. Background technique [0002] Display drivers are widely used in display modules of products such as hardened displays, KVMs, and all-in-one machines; for example, a hardened notebook needs to manually switch video sources (mainboard video signal source and external KVM video signal source) to select output display. The traditional method is The LVDS signal output by the motherboard and the LVDS signal converted by VGA input by the external KVM are selected and output through a two-to-one switch chip. This solution has certain limitations. For example, the LVDS LCD screen is gradually replaced by the eDP LCD screen. The frequency of the signal is much higher than that of the LVDS signal, and the existing switch chips cannot meet the requirements of the eDP signal for the signal switching frequency (for example, the maximum switching ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/765
CPCH04N5/765
Inventor 朱凯于治楼吴之光
Owner SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD