Eye Tracking Motion Blur Compensation in LCDs
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Solution Overview
Problem
Liquid crystal displays (LCDs) suffer from motion blur due to eye tracking characteristics, which are not effectively addressed by existing solutions, as they involve low-pass filtering that affects human perception of moving images, leading to image continuity issues.
Innovation Solution
Adjusting pixel values of input image signals based on generated motion vectors to compensate for eye tracking characteristics, using an eye tracking compensated system that includes a motion vector detecting unit and a compensating unit to generate a compensated signal with reduced motion blur, displayed on the LCD.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If liquid crystal displays are used to replace conventional cathode ray tube displays, then energy consumption is reduced and device lifespan is extended, but motion blur occurs in moving images due to liquid crystal response speeds and eye tracking characteristics
Solution Approach 1:
The patent applies preliminary action by predicting future pixel values based on historical data and motion vectors before the actual display refresh occurs. The motion blur compensation unit calculates compensated pixel values in advance using temporal information from previous frames and predicted motion, then applies these pre-calculated values to reduce the perceived motion blur during display.
Solution Approach 2:
The patent changes parameters by adjusting pixel luminance values dynamically based on motion detection. The system modifies the display parameters (pixel values) according to detected motion vectors and eye tracking characteristics, transforming static display output into motion-adapted output that compensates for the low-pass filtering effect of human vision during motion.
2Speed
If high-speed liquid crystal materials and over-drive techniques are used to reduce motion blur, then response speed is improved, but motion blur caused by eye tracking characteristics remains unsolved due to the hold-type nature of liquid crystal displays
Solution Approach 1:
The patent introduces an intermediary processing layer between the video signal source and the liquid crystal display. The motion blur compensation unit acts as this intermediary, inserting motion compensation calculations that account for eye tracking characteristics. This intermediary layer processes the video signal to pre-compensate for the hold-type display's interaction with human visual motion perception, rather than relying solely on faster liquid crystal response.
Solution Approach 2:
The system implements feedback by using detected motion vectors from current and previous frames to adjust subsequent frame rendering. The motion detection and compensation process creates a feedback loop where motion information from displayed content is used to modify the rendering of future content, continuously adapting to compensate for eye tracking effects throughout video playback.
3Measurement precision
If pixel values are adjusted based on motion vectors to compensate for eye tracking characteristics, then motion blur is reduced and image clarity is improved, but additional processing complexity is introduced
Solution Approach 1:
The patent segments the video processing pipeline into distinct functional units: motion detection module, motion vector generation module, compensation calculation module, and output generation module. Each unit handles a specific aspect of the compensation process, making the overall complex system more manageable and implementable through modular design while maintaining the sophisticated compensation algorithms.
Data Source
AI summary
Motion blur associated with hold-type display devices may be reduced by eye tracking compensation. Eye tracking compensation may depend on the magnitude and direction of a motion vector, which may be used to generate a human-vision image compensation signal. An original input image signal and the human-vision image compensation signal may be used to generate and output a compensated image signal. As a result, motion blur arising from eye tracking characteristics is reduced.