Eye-Tracked Microlens Display for Stable Vision Correction Focus
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Solution Overview
Problem
Existing display devices for users with visual impairments struggle with maintaining image focus when the user moves relative to the display, negatively impacting the viewing experience.
Innovation Solution
A display device equipped with a pixelated display, eye-tracking system, and microlens array that adjusts subpixel values based on eye position and focal length to maintain image focus, using a processor to determine virtual image planes and subpixel values for optimal image rendering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the user moves relative to the display device, then the viewing angle changes, but the image focus deteriorates
Solution Approach 1:
The display device dynamically adjusts the image rendering parameters based on the user's eye position and focal length. The processor continuously modifies the virtual image plane location and subpixel values in real-time as the user moves, transforming a static display system into a dynamic one that adapts to changing viewing conditions to maintain image focus.
Solution Approach 2:
The system changes multiple parameters simultaneously including the virtual image plane location, subpixel emission values, and microlens array configuration. By adjusting these parameters based on eye-tracking data and focal length information, the system compensates for viewing angle changes and maintains optimal image focus for users with visual impairments.
2Manufacturing precision
If subpixel values are adjusted to maintain focus for moving users, then image clarity is improved, but computational intensity increases
Solution Approach 1:
The system pre-calculates and stores lookup tables containing corrected subpixel values for various viewing conditions and focal lengths. When the user moves, the processor quickly retrieves pre-computed correction data based on the current eye position and focal length, avoiding the need for complex real-time calculations and reducing computational power consumption.
Solution Approach 2:
The patent replaces complex real-time optical calculations with pre-computed lookup tables and simplified retrieval operations. This substitution of computational mechanics reduces the processing burden while maintaining the precision needed for image focus correction in users with visual impairments.
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 system ensures images remain in focus for users with visual impairments as they move, enhancing the viewing experience by reducing computational intensity and maintaining image clarity.
Implementation Method 1
a microlens array provided on the pixelated display, wherein the microlens array comprises microlenses that are arranged in a two-dimensional plane oriented parallel to the pixelated display, wherein the microlens array covers, preferably completely covers, the pixelated display, and wherein the microlens array is configured to project light emitted by the pixelated display towards the eye of the user in the viewing location
Data Source
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AI summary
The invention relates to a display device for displaying an image for a user having a visual impairment. The display device comprises a pixelated display, a processor, an eye-tracking system and a microlens array. The invention is also related to a method for displaying an image for a user having a visual impairment on a display device. The invention is further related to a processor for operating a display device adapted for displaying an image for a user having a visual impairment and a computer program for performing the method of the invention.