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Circuit and method for supporting dual-path output of mainboard EDP and LVDS

A dual output and circuit technology, applied in TV, electrical components, color TV, etc., can solve the problems of poor user experience, low stability, high cost, etc., and achieve the effect of reducing cost and improving user experience

Inactive Publication Date: 2019-09-10
深圳市智微智能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a circuit and method supporting dual output of EDP and LVDS on the motherboard, aiming at solving the problem of high cost due to the inability of the prior art to provide a circuit and method for storing extended display identification data without using a memory chip, Low stability and poor user experience

Method used

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  • Circuit and method for supporting dual-path output of mainboard EDP and LVDS
  • Circuit and method for supporting dual-path output of mainboard EDP and LVDS

Examples

Experimental program
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Effect test

Embodiment 1

[0019] figure 1 Shown is the block diagram of the circuit supporting the main board EDP and LVDS dual output provided by Embodiment 1 of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0020] Including input and output chip 100 and backlight control circuit 200 and signal conversion chip 300; Signal conversion chip 300 is used to convert the video signal output of the EDP mode of CPU 400 output to the video signal output of LVDS mode 301; Backlight control circuit 200 is used for Adding a backlight control signal to the DP mode video signal output by the central processing unit 400; the input and output chip 100 is used to control the output voltage of the backlight control circuit 200;

[0021] Signal conversion chip 300 converts the video signal of the EDP mode that central processing unit 400 outputs to the video signal of LVDS mode 301, to realize the v...

Embodiment 2

[0023] figure 2 It shows the implementation flow of the method for supporting the mainboard EDP and LVDS dual output provided by Embodiment 2 of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0024] In step S101, it is detected whether the EDP port of the central processing unit is opened or closed.

[0025] In step S1011, the control pin of the signal conversion chip is at a high level;

[0026] In the embodiment of the present invention, after detecting that the EDP port of the central processing unit is opened, the control pin of the signal conversion chip is at a high level.

[0027] In step S1012, the control pin of the signal conversion chip is low level;

[0028] In an embodiment of the present invention, after detecting that the EDP port of the central processing unit is closed, the control pin of the signal conversion chip is at a low level, an...

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Abstract

The invention is applicable to the technical field of extended mainboard display output, and provides a circuit supporting mainboard EDP and LVDS double-path output. A signal conversion chip convertsthe EDP-mode video signal output by the mainboard into an LVDS-mode video signal so as to realize the output of the LVDS-mode video signal; the backlight control circuit adds a backlight control signal to the DP-mode video signal output by the mainboard, so that the DP-mode video signal has a backlight control function, and further the output of the EDP-mode video signal is realized; the input / output chip controls the output voltage of the backlight control circuit to adjust the backlight degree; under the condition that a storage chip is not used for storing the extended display identification data, EDP and LVDS double-channel video signal output is also supported. Therefore, the cost is reduced, and the user experience is improved.

Description

technical field [0001] The invention belongs to the technical field of extended motherboard display output, and in particular relates to a circuit and a method for supporting dual output of a motherboard EDP and LVDS. Background technique [0002] The motherboard usually has a native EDP port and a DP port. If you need to support LVDS port output, you need to use a signal conversion chip to convert the DP port into an LVDS port to support EDP+LVDS dual output. Therefore, you need to use FLASH (storage ) chip to store EDID (Extended Display Identification Data) related information, which not only increases the cost, but also is not easy to maintain. When the content of the FLASH chip is damaged, the LVDS display will be abnormal, and it needs to be returned to the factory for repair, which will affect the user experience. Contents of the invention [0003] The purpose of the present invention is to provide a circuit and method supporting dual output of mainboard EDP and LVD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/268H04N7/01
CPCH04N5/268H04N7/01
Inventor 黄常健周隆金
Owner 深圳市智微智能科技股份有限公司
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