Autostereoscopic Display Eye Tracking Illumination Adaptation
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Solution Overview
Problem
Existing autostereoscopic display systems face challenges in accurate eye tracking due to varying light conditions, particularly when there is light contrast or non-constant illumination on the face, which affects the quality of 3D images and the ability to recognize viewer emotions or gestures.
Innovation Solution
A display device with a viewer tracking system that includes a camera for measuring light intensity, at least two independently controllable illumination sources, and processors to adapt illumination based on measured data, ensuring accurate eye tracking and image direction to specific eyes even under changing illumination conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If face tracking is performed under varying light conditions, then viewer position detection is achieved, but measurement precision deteriorates due to light contrast and non-constant illumination
Solution Approach 1:
The illumination sources are made dynamically controllable with independent intensity adjustment for each source. The system continuously adapts the illumination pattern based on detected face illumination conditions, changing the intensity of individual light sources to maintain optimal face lighting despite external light variations.
Solution Approach 2:
The system changes the illumination parameters (intensity, distribution) by controlling multiple independently adjustable light sources. By modifying these parameters in response to detected illumination conditions, the system maintains consistent face lighting for accurate tracking.
2Adaptability or versatility
If multiple illumination sources are used to compensate for varying light conditions, then adaptability to illumination conditions improves, but device complexity increases
Solution Approach 1:
The illumination system is segmented into multiple independently controllable light sources positioned at different locations. Each light source can be controlled separately, allowing the system to create different illumination patterns and compensate for various external lighting conditions without requiring a single complex adjustable source.
3Measurement precision
If illumination is adapted in real-time to maintain constant face intensity, then measurement precision improves, but use of energy increases
Solution Approach 1:
The system uses feedback from the detection of face illumination conditions to control the illumination sources. The processor continuously monitors the face lighting and adjusts the light source intensities accordingly, creating a closed-loop control system that maintains optimal illumination while minimizing energy consumption by only activating necessary light sources at appropriate intensities.
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
Enables accurate and real-time eye tracking and improved 3D image quality by dynamically adjusting illumination to match changing light conditions, allowing for effective recognition of viewer positions and gestures.
Implementation Method 1
A display device with a viewer tracking system that includes a camera for measuring light intensity
Data Source
AI summary
Provided is a display device comprising a display panel having an array of display pixel elements for producing a display output; a viewer detecting system rendering data representing 1) the illumination intensity of a body part of the viewer and 2) another property of the body part; at least one illumination source for providing illumination of a body part of the viewer; and a processor configured to 1) process the data representing the illumination intensity of a body part of the viewer and 2) drive the at least one illumination source dependent on said illumination data to adapt the illumination intensity of a body part of the viewer.