Display Device Vertical Synchronization Signal Adjustment
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Solution Overview
Problem
Image display devices with fixed screen ratios struggle to process varied vertical synchronization signals, leading to screen shaking and unnatural image representation when handling images with different frame rates, as they often require repetitive reproduction of previous screens to maintain stability.
Innovation Solution
An image display device equipped with a synchronization signal detecting unit, information extracting unit, clock generating unit, and output synchronization signal generating unit, which adjusts the vertical and horizontal synchronization signals to match the image size and frame rate, allowing for selective operation modes and maintaining stable image output without adding separate components or altering structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a fixed screen ratio is used to maintain stable image display, then image stability is improved, but the ability to handle varied vertical synchronization signals deteriorates
Solution Approach 1:
The patent applies dynamics by making the front porch duration variable rather than fixed. The synchronization signal generating unit adjusts the front porch time based on the detected vertical synchronization signal characteristics, allowing the display device to adapt to different frame rates and image sizes while maintaining stable image display. This dynamic adjustment resolves the contradiction between image stability and adaptability to varied signals.
2Stability of the object's composition
If repetitive reproduction of previous screens is performed to maintain stability, then image stability is improved, but screen flickering and unnatural feeling worsen
Solution Approach 1:
The patent changes the parameter of front porch duration in the synchronization signal to match the actual image content requirements. By detecting the vertical synchronization signal characteristics and adjusting the front porch time accordingly, the system avoids repetitive screen reproduction while maintaining stability, thereby eliminating screen flickering and unnatural feelings.
3Adaptability or versatility
If synchronization signals are adjusted to match image size and frame rate, then adaptability to varied signals is improved, but device complexity worsens
Solution Approach 1:
The patent implements feedback by detecting the vertical synchronization signal characteristics and using this information to adjust the front porch duration in the output synchronization signal. The synchronization signal generating unit receives feedback from the detected signal parameters and dynamically adjusts its output accordingly, enabling adaptability without requiring complex processing structures.
Data Source
AI summary
Disclosed are an image display device and an image processing method thereof. A signal processing method of the image display device according to the present invention is a signal processing method of an image display device configured to receive an image having a varied vertical synchronization signal, including detecting an input synchronization signal using an input image clock, extracting an input vertical synchronization signal from the input synchronization signal, delaying the input vertical synchronization signal by a reference value of an output clock, continuously tracking a falling region of the delayed input vertical synchronization signal, and finally generating an output synchronization signal in which a vertical front porch is varied.