Multiscopic Rendering With Extended View Regions for Stable Brightness
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Solution Overview
Problem
Multiscopic displays suffer from instability in perceived brightness and image quality due to narrow emission regions, head motion sensitivity, tracking uncertainty, crosstalk, and under-utilization of light-emitting cells, leading to issues like dimming, flicker, and ghosting.
Innovation Solution
A system and method that identify distinct sets of light-emitting cells for each eye and determine additional sets based on predefined thresholds, incorporating these into the rendering process to enhance stability and efficiency, using eye tracking and optical geometry to ensure continuous and clear image presentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If narrow emission regions are used to achieve angular selectivity, then viewing direction control is improved, but sensitivity to head motion increases
Solution Approach 1:
The array of light-emitting cells is divided into multiple distinct sets, where each set is assigned to a specific viewing direction. By segmenting the emission regions and assigning multiple sets to overlapping viewing directions, the system maintains angular selectivity while providing redundancy to compensate for head motion.
Solution Approach 2:
The system pre-identifies multiple distinct sets of light-emitting cells for each viewing direction before actual display operation. This preliminary assignment ensures that when head motion occurs, alternative sets are already prepared to maintain image stability without requiring real-time recalibration.
2Ease of manufacture
If margins are maintained between emission regions to mitigate crosstalk, then image quality is improved, but effective emission regions are narrowed
Solution Approach 1:
The patent extends the problem from two-dimensional spatial margins to three-dimensional temporal-marginal space by maintaining temporal separation between emissions for different viewing directions. This allows reduced spatial margins while preventing crosstalk through time-division multiplexing of light emission.
Solution Approach 2:
The system dynamically controls the timing and activation of light-emitting cells based on real-time eye tracking data. By dynamically adjusting which sets are active at any moment, the system can use smaller spatial margins while maintaining crosstalk mitigation through temporal separation.
3Measurement precision
If eye tracking is used to direct image content toward eyes, then viewing accuracy is improved, but latency and uncertainty cause image degradation
Solution Approach 1:
The system pre-identifies multiple distinct sets of light-emitting cells for each possible eye position before actual display operation. This preliminary assignment ensures that when eye tracking data arrives (even with latency), the system can immediately switch to the appropriate pre-prepared set without calculation delay, maintaining image stability.
Solution Approach 2:
The system changes the parameter of light emission by activating different distinct sets based on eye tracking feedback. When tracking uncertainty or latency occurs, the system can switch between predefined sets with different spatial parameters to compensate for position errors and maintain image quality.
4Productivity
If many light-emitting cells lie outside emission regions, then array utilization efficiency decreases, but brightness stability is worsened
Solution Approach 1:
The patent makes light-emitting cells universal by assigning them to multiple distinct sets for different viewing directions. Each cell can serve multiple functions by being included in different sets activated at different times based on eye position, thereby increasing overall array utilization while maintaining brightness stability through distributed contribution from many cells.
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
The solution increases perceived brightness and reduces image degradation by enlarging effective emission regions, improving utilization efficiency, and minimizing crosstalk, resulting in stable and robust multiscopic rendering even under conditions of head motion and tracking uncertainty.
Implementation Method 1
Multiscopic displays direct light emitted from different regions of an array of light-emitting cells toward different viewing directions
Implementation Method 2
when an effective thickness of a lenticular lens in a given viewing direction matches a focal length of the lenticular lens, a corresponding focus spot on the array becomes very small
Data Source
AI summary
A multiscopic display includes an array of light-emitting cells and a multiscopic optical element including a plurality of multiscopic cells. For a given multiscopic cell, distinct sets of light-emitting cells whose emitted light is directed toward respective eyes of at least one user are identified, and at least one additional set of light-emitting cells that does not emit light directed toward any of the eyes, is separated by a distance smaller than a first predefined threshold from a single distinct set of light-emitting cells, and is separated by a distance greater than a second predefined threshold from other distinct sets of light-emitting cells is determined. Pixel values are retrieved corresponding to the distinct sets and the at least one additional set from images to be presented to the respective eyes, and are used to generate an output image for display via the multiscopic display.