Image Conversion Circuit Synchronization Signal Alignment
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Solution Overview
Problem
Image conversion devices face challenges in generating synchronized horizontal and vertical synchronization signals, leading to incomplete pixel data display and abnormal images due to incompatible pixel clock periods and synchronization signal timing, especially when converting image frames between different resolutions and display devices.
Innovation Solution
An image conversion device with an image converting circuit and a signal generating circuit that produces synchronization signals with a fixed period, ensuring synchronization by aligning the start times of horizontal and vertical synchronization signals, and adjusting the timing as needed to maintain frame synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pixel clock period is adjusted to match different display device specifications, then compatibility with different resolutions is improved, but synchronization between horizontal and vertical synchronization signals deteriorates
Solution Approach 1:
The patent segments the image conversion process into multiple processing stages: receiving source image frames, converting to converted image frames, generating horizontal synchronization signals, generating vertical synchronization signals, and outputting to the display device. This segmentation allows independent optimization of each stage to resolve the contradiction between adaptability and synchronization reliability.
Solution Approach 2:
The patent introduces an intermediary processing mechanism that receives source image frames, converts them to converted image frames with different resolution, and generates synchronized synchronization signals. This intermediary conversion process acts as a mediator between the source image and display device, enabling compatibility with different resolutions while maintaining synchronization through coordinated signal generation.
2Adaptability or versatility
If horizontal blanking interval or vertical blanking interval is converted to match display device specifications, then display compatibility is improved, but frame synchronization with source image frames deteriorates
Solution Approach 1:
The patent changes the parameters of the image frames during conversion, including resolution dimensions and blanking intervals, to match display device specifications. By carefully controlling these parameter changes and coordinating them with synchronized signal generation, the system achieves display compatibility while preventing frame synchronization issues.
3Adaptability or versatility
If multiple synchronization signals are generated for different resolutions, then adaptability to different display devices is improved, but signal synchronization and timing alignment deteriorate
Solution Approach 1:
The patent creates a universal image conversion system that can handle multiple resolutions and display device specifications through a single integrated process. The conversion circuit and signal generation circuit work together to provide multi-functional capability, adapting to different display devices while maintaining consistent synchronization through coordinated signal generation.
Data Source
AI summary
An image conversion device is disclosed, having an image converting circuit for receiving a first and a second image frames of a first format and generating a third and a fourth image frames of a second format; and a signal generating circuit coupled with the image converting circuit for generating a plurality of first synchronization signals having a substantially fixed period and one or more second synchronization signals for the third and the fourth image frames, wherein each of the second synchronization signals is synchronized with one of the first synchronization signals and the third image frame contains at least one more first synchronization signal than the fourth image frame.