Predictive Observer Tracking for Auto-Stereoscopic Display Parallax Barriers
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Solution Overview
Problem
Existing auto-stereoscopic display apparatuses face challenges in maintaining display quality due to delays in detecting and responding to observer position changes, leading to suboptimal barrier stripe control and degraded stereoscopic image quality.
Innovation Solution
A display apparatus comprising a detector, predictor, and controller that predicts observer positions based on past detections and controls light shutters in the parallax barrier to enhance stereoscopic image quality, reducing delays and improving barrier stripe alignment with observer movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image capture and barrier control are performed sequentially with calculation processing, then observer position detection is achieved, but system response delay occurs due to processing time and optical response time
Solution Approach 1:
The patent applies preliminary action by predicting the observer's future position based on past detection data before the actual barrier control is executed. The prediction unit calculates where the observer will be when the barrier stripes need to be formed, rather than reacting to the current position after detection and calculation delays. This anticipatory approach compensates for the system's inherent response time lag.
Solution Approach 2:
The patent implements dynamics by continuously updating the barrier stripe control based on the moving observer's predicted position rather than maintaining a static barrier pattern. The system dynamically adjusts the barrier stripe positions and timing to match the observer's motion trajectory, ensuring accurate stereoscopic image delivery throughout the observer's movement.
2Reliability
If barrier stripes are controlled based on detected observer position, then stereoscopic image quality improves, but the control is too slow when observer is moving due to system delay
Solution Approach 1:
The prediction unit performs preliminary calculation of the observer's future position before the barrier control is executed. By anticipating where the observer will be when the light shutters need to respond, the system pre-calculates the appropriate barrier stripe configuration, thereby reducing the effective response delay and maintaining image quality during observer movement.
3Ease of manufacture
If liquid crystal barriers are used for barrier stripe generation, then light transmissive and blocking states are achieved, but optical response time is relatively long especially under low temperature conditions
Solution Approach 1:
The system applies preliminary action by predicting the observer position and pre-calculating the required barrier stripe configuration before the liquid crystal barriers need to respond. This advance calculation allows the slow liquid crystal optical response to be compensated, as the barriers are already positioned optimally by the time the observer reaches the predicted position.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly enhances stereoscopic image quality by predicting observer positions and adjusting the parallax barrier in real-time, ensuring optimal barrier stripe alignment and reducing delays associated with observer movement.
Implementation Method 1
a parallax barrier in which a plurality of light shutters switchable between a light transmissive state and a light blocking state with respect to light from the display panel
Data Source
AI summary
Provided is a technique for enhancing the display quality of a stereoscopic image. A display apparatus includes a parallax barrier, a detector, a predictor, and a controller. The detector detects a position of an observer. The predictor predicts, on the basis of a plurality of positions detected by the detector at past times, the position of the observer at a time coming after the past times, at which the plurality of positions have been detected. The controller determines a parallax barrier pattern selectively switching a plurality of barriers to a light transmissive state, and controls the parallax barrier on the basis of the parallax barrier pattern.