LCD Image Processing System for Motion Blur Reduction
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Solution Overview
Problem
Conventional image processing techniques for LCDs fail to effectively reduce motion blur and smear effects at object edges in high contrast images, leading to reduced image quality and frame flicker.
Innovation Solution
An image processing system comprising a frame converter, high pass filter, delay device, local contrast measurement device, high frequency gain device, and mixer, which converts the original frame signal into a double frequency signal, performs high pass filtering, delay operations, measures local contrast, adjusts gains based on contrast, and mixes signals to produce an output frame signal, dynamically enhancing high frequency components and avoiding brightness reduction and smear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a black or gray screen is placed between original images to simulate pulse display feature, then motion blur is reduced, but image brightness becomes darker and frame flicker occurs
Solution Approach 1:
The patent applies dynamics by making the display brightness adjustable rather than fixed. The brightness adjustment device dynamically changes the brightness of the display panel based on the processed image signal, allowing the system to adapt to different viewing conditions and maintain optimal image quality while reducing motion blur effects.
Solution Approach 2:
The patent changes the brightness parameter of the display panel dynamically. By using the brightness adjustment device, the system modifies the illumination intensity parameter in real-time based on the processed image characteristics, enabling the system to overcome the brightness darkening problem while maintaining motion blur reduction benefits.
2Object-affected harmful factors
If double frequency frame output signal is used with motion detector to reduce motion image residual, then motion blur is reduced, but smear effect occurs at object edges of high contrast image
Solution Approach 1:
The patent applies local quality by processing different regions of the image differently. The edge detection device identifies high contrast edges, and the brightness adjustment device applies different brightness levels to different regions. This localized processing preserves edge sharpness while reducing motion blur in the overall image.
Solution Approach 2:
The patent uses feedback mechanisms where the edge detection device continuously monitors the image for high contrast edges and feeds this information back to the brightness adjustment device. This feedback loop allows the system to dynamically adjust brightness in response to detected edges, preventing smear effects while maintaining motion blur reduction.
3Object-affected harmful factors
If high frequency gain is increased to enhance high frequency component, then motion image residual is reduced, but smear effect at object edges increases
Solution Approach 1:
The patent applies local quality by selectively adjusting brightness in different regions of the image. Instead of uniformly increasing high frequency gain throughout the entire image, the system identifies high contrast edges and applies localized brightness adjustment, thereby enhancing motion blur reduction in non-edge regions while preserving edge sharpness.
Solution Approach 2:
The patent changes the brightness parameter locally rather than globally. The brightness adjustment device modifies the brightness parameter in specific regions based on edge detection results, allowing the system to optimize the balance between motion blur reduction and edge sharpness by adjusting parameters differently across the image.
Data Source
AI summary
In an image processing system for a liquid crystal display a frame converter receives an original frame signal and produces a double frequency frame signal. A high pass filter performs a high pass filtering on the double frequency frame signal and produces a high pass double frequency frame signal. A delay device performs a delay operation on the double frequency frame signal and produces a delayed double frequency frame signal. A local contrast measurement device measures a contrast of the double frame signal and produces a local contrast signal. A high frequency gain device performs a gain adjustment on the high pass double frequency frame signal based on the local contrast signal and produces a gained high pass double frequency frame signal. A mixer is employed to mix the gained high pass double frequency frame signal and the delayed double frequency frame signal and produce an output frame signal.