Image Test System Interface Conversion Circuit for Signal Integrity
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Solution Overview
Problem
Current image test systems face challenges with C-PHY signal transmission due to longer data routes and signal clock offset, leading to increased energy consumption and accuracy issues.
Innovation Solution
An image test system with a test assembly that includes a first MIPI C-PHY interface and a second high-speed logic interface, utilizing an interface conversion circuit and a fuzzy controller with a memory unit to convert and recover clock data, reducing signal transmission loss and jitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If C-PHY signals are transmitted through a longer data transmission route, then the transmission distance is extended, but energy consumption increases and signal quality deteriorates
Solution Approach 1:
The patent introduces an interface conversion circuit as an intermediary component that converts C-PHY signals to D-PHY signals for transmission. This mediator allows the system to utilize the longer transmission route capability of D-PHY while maintaining energy efficiency and signal quality, resolving the contradiction between transmission distance and energy consumption
2Length of stationary object
If C-PHY signals are transmitted through a longer data transmission route, then the transmission distance is extended, but signal jitter increases and accuracy decreases
Solution Approach 1:
The interface conversion circuit acts as a mediator that transforms C-PHY signals into D-PHY signals, which are better suited for longer transmission routes. This conversion maintains signal integrity and reduces jitter, thereby preserving measurement precision over extended transmission distances
Solution Approach 2:
The patent changes the signal transmission parameters by converting from C-PHY to D-PHY format. This parameter change enables the signal to maintain its integrity over longer transmission routes, reducing jitter and improving overall signal accuracy
3Device complexity
If C-PHY signals are used without clock data for correction, then the signal transmission is simpler, but time sequence correction cannot be performed and accuracy is affected
Solution Approach 1:
The interface conversion circuit serves as an intermediary that not only converts signal formats but also enables the addition of clock data for time sequence correction. This mediator resolves the contradiction by maintaining relative simplicity while improving time sequence accuracy through the D-PHY format
Data Source
AI summary
An image test system includes a test assembly and an image capture card. The test assembly is provided for capturing test signals from test objects, and incudes a first transmission interface, a second transmission interface, and an interface conversion circuit. The interface conversion circuit is connected with the first transmission interface, and converts signal transmission forms of the test signals. The second transmission interface is connected with the interface conversion circuit. Besides, the image capture card is provided for connecting with the second transmission interface, and captures image data from the test signals.