eDP Interface Circuit Using Empty Pins for IIC Communication
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Solution Overview
Problem
Conventional eDP interfaces do not support Inter-Integrated Circuit (IIC) communication between the main board and logic board in large-sized 4K liquid crystal displays, limiting their functionality.
Innovation Solution
The interface circuit repurposes empty pins of the video transmission interface to function as an IIC communication interface, incorporating an isolation circuit to ensure that IIC signal transmission does not interfere with video signal transmission, thereby meeting the IIC communication requirements between the main and logic boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional eDP interface is used for video transmission, then video signal transmission is achieved, but IIC communication function is not supported
Solution Approach 1:
The patent applies multi-functionality by defining empty pins of the video transmission interface as an IIC communication interface, allowing the same physical interface to serve both video transmission and IIC communication purposes. This resolves the contradiction by enabling the interface to handle multiple functions without adding separate dedicated hardware for IIC communication.
2Adaptability or versatility
If empty pins are defined as IIC communication interface, then IIC communication is enabled, but video signal transmission may be affected
Solution Approach 1:
The patent introduces an isolation circuit as an intermediary between the video transmission interface and the IIC communication interface. This isolation circuit prevents interference between the two functions by electrically isolating them while allowing controlled interaction, thus ensuring video signal reliability while enabling IIC communication capability.
3Adaptability or versatility
If separate IIC communication interface is added, then IIC communication requirements are met, but interface circuit cost increases
Solution Approach 1:
The patent merges the IIC communication interface with the existing video transmission interface by utilizing empty pins. This combining approach allows IIC communication functionality to be integrated into the existing interface structure, avoiding the need for separate dedicated pins and reducing overall interface circuit complexity and cost.
Data Source
AI summary
An interface circuit and a display device are provided. The interface circuit is for use in the display device. The display device includes a main board and a logic board. The interface circuit includes a video transmission interface, an IIC communication interface, and an isolation circuit. The video transmission interface includes empty pins, allowing video signal transmission between the main board and the logic board. The IIC communication interface is obtained by defining the empty pins, enabling IIC signal transmission between the main board and the logic board. The isolation circuit is electrically connected to the IIC communication interface. The empty pins of the video transmission interface are defined as the IIC communication interface, satisfying the IIC communication requirements between the main board and the logic board, reducing the cost of the interface circuit, and not affecting the original video signal transmission function.