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Device and method for adjusting aux channel amplitude in DP interface

A technology of amplitude adjustment and channel, which is applied in the field of signal processing, can solve the problems of increasing the test cost of liquid crystal modules, etc., and achieve the effect of improving test efficiency, reducing test cost and improving applicability

Active Publication Date: 2021-03-09
WUHAN JINGCE ELECTRONICS GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when the liquid crystal module testing equipment is testing the liquid crystal module, for the liquid crystal module of different DP protocols, it is necessary to design various liquid crystal module test devices with matching AUX amplitudes, which significantly increases the test cost of the liquid crystal module

Method used

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  • Device and method for adjusting aux channel amplitude in DP interface
  • Device and method for adjusting aux channel amplitude in DP interface
  • Device and method for adjusting aux channel amplitude in DP interface

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0020] Due to the importance of AUX channel data to DP point screens, and different DP protocols and liquid crystal modules have different requirements for the amplitude of AUX, ensuring the signal quality of AUX channels is a prerequisite for DP point screens, so the present invention designs A DP interface AUX channel amplitude adjustment device, it includes TTL to LVDS chip 1, LVDS differential amplifier 2, digital potential module, wherein, said TTL to LVDS chip 1 is used to send data in AUX, when AUX sends Under the trigger of the control signal TX_GPIO, the AUX transmission signal AUX_TX (single-ended signal) is converted into a corresponding LVDS signal (differential signal), and the TTL-to-LVDS chip 1 is used to receive the enable control signal at AUX when receiving data at AUX Under the trigger of RX_GPIO, AUX positive signal AUXP and ...

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Abstract

The invention discloses an AUX channel amplitude adjustment device in a DP interface. Its TTL-to-LVDS chip is used to convert the AUX transmission signal into a corresponding LVDS signal under the trigger of the AUX transmission enable control signal when the AUX transmits data. , TTL to LVDS chip is used to convert AUX positive signal and AUX negative signal into AUX receiving signal under the trigger of AUX receiving enable control signal when AUX receives data; LVDS differential amplifier is used to convert from TTL to LVDS chip The LVDS signal is amplified by the corresponding multiple according to the requirement, so as to obtain the AUX positive signal and the AUX negative signal that meet the required amplitude requirements; the digital potential module is used to configure the LVDS signal amplification factor of the LVDS differential amplifier. The invention realizes the adjustment of the amplitude of the AUX channel in the DP interface, and improves the test efficiency of the display model.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a device and method for adjusting the amplitude of an AUX channel in a DP interface. Background technique [0002] DP interface (DisplayPort) is an image display interface, it can not only support full HD display resolution (1920×1080), but also support 4k resolution (3840×2160), and the latest 8k resolution (7680×4320) . The DP interface not only has a high transmission rate, but also is reliable and stable. The signal transmitted by the interface is composed of a data channel signal for transmitting images and an auxiliary channel signal for transmitting image-related status and control information, specifically including DisplayPort data transmission main channel (Main Link), Auxiliary channel (AUX Channel) and connection (Link Training). [0003] The auxiliary channel (AUX Channel) is an independent two-way transmission auxiliary channel in the DP interface. It ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/00
CPCG09G3/006
Inventor 程洪
Owner WUHAN JINGCE ELECTRONICS GRP CO LTD