Light Transmitting Display System for Parallax-Free Eye Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Parallax issues arise in light transmitting display systems when users view images with their left and right eyes, as the images overlap differently for each eye, causing eye strain and discomfort.
Innovation Solution
A light transmitting display system that includes a processing device to detect user and background object locations, calculate left and right eye viewpoints, and alternately display images at these viewpoints using a head-mounted device, ensuring alignment with the background object for each eye.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the image is aligned based on the right eye viewpoint, then the right eye viewing is accurate, but the left eye experiences parallax and eye strain
Solution Approach 1:
The patent divides the single image into separate left eye and right eye images, calculating distinct viewpoints for each eye. This segmentation allows each eye to receive an image optimized for its specific viewpoint, eliminating the parallax conflict that occurs when a single image must serve both eyes.
Solution Approach 2:
The patent dynamically adjusts the image content and positioning based on detected eye positions and head movements. By continuously tracking the user's gaze and recalculating viewpoints in real-time, the system adapts the displayed image to maintain optimal alignment for both eyes during viewing.
2Ease of operation
If the image is shifted to accommodate the left eye, then left eye comfort improves, but the right eye experiences burden and misalignment
Solution Approach 1:
The patent creates separate image streams for left and right eyes with different positioning and perspective adjustments. This allows independent optimization for each eye's comfort and alignment requirements without compromising the other eye's viewing quality.
Solution Approach 2:
Different regions of the display are optimized for different eyes. The left portion of the display is adjusted for left eye viewpoints while the right portion is adjusted for right eye viewpoints, with each region having locally optimized image characteristics tailored to its target eye.
3Device complexity
If a single viewpoint is used for both eyes, then the system is simple, but parallax causes eye strain and viewing discomfort
Solution Approach 1:
The system dynamically determines viewpoints based on real-time detection of eye positions and head orientation. Rather than using fixed predetermined viewpoints, the system calculates optimal viewpoints on-the-fly based on actual user anatomy and viewing geometry, adapting to individual users and viewing conditions.
Solution Approach 2:
The patent incorporates feedback loops where eye tracking data and head position information are continuously monitored and used to adjust the image rendering parameters. This feedback mechanism allows the system to maintain accurate left and right eye viewpoints despite changes in user position or anatomy.
Data Source
AI summary
A light transmitting display system, an image output method thereof and a processing device thereof are provided. The light transmitting display device is located between a background object and a user. The image output method includes the following steps. The locations of the user, the light transmitting display device and the background object are detected. A coordinate conversion relationship between the user, the light transmitting display device and the background object is established. An eyes midpoint and an eyes offset of the user are detected. A left eye viewpoint and a right eye viewpoint of the user on the light transmitting display device are calculated according to the coordinate conversion relationship, the eyes midpoint and the eyes offset of the user. As a head-mounted device is switched, an image is alternately displayed at the left eye viewpoint and the right eye viewpoint.