HMD Display Layout for Eye Tracking Without Image Quality Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing head-mounted display (HMD) devices face challenges in accurately tracking user gaze and obtaining biometric information due to limitations in display and eye-tracking sensor configurations, which affect image quality and efficiency.
Innovation Solution
The HMD apparatus incorporates a display with distinct regions of varying pixel density and an eye-tracking sensor positioned to receive reflected light from a light source, allowing for improved gaze and biometric data acquisition, with the eye-tracking sensor being placed to enhance light reception and maintain high image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the eye-tracking sensor is positioned to receive reflected light from the display region, then gaze tracking precision is improved, but the display quality in that region deteriorates due to pixel density reduction
Solution Approach 1:
The display is divided into a first display region with higher pixel density for normal viewing and a second display region with lower pixel density corresponding to the eye-tracking sensor position. This local differentiation allows the eye-tracking sensor to receive sufficient reflected light while maintaining high display quality in the primary viewing area.
2Device complexity
If the eye-tracking sensor is positioned adjacent to the display, then device complexity is reduced, but light reception efficiency deteriorates
Solution Approach 1:
The eye-tracking sensor is positioned adjacent to the display in a spatial arrangement that allows it to receive reflected light from the display region. The optical path is optimized by considering the angular relationship between the light source, display, and sensor, enabling effective gaze tracking with simplified device architecture.
3Use of energy by moving object
If pixel density is reduced in the second display region to enhance light reception, then light reception efficiency is improved, but overall display resolution deteriorates
Solution Approach 1:
The display implements different pixel densities in different regions: the first display region maintains high pixel density for primary viewing areas, while the second display region has reduced pixel density to enhance light reception for eye-tracking. This localized optimization ensures overall display resolution is preserved while improving eye-tracking functionality.
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 enables precise gaze tracking and biometric information retrieval while maintaining high image quality, enhancing user interaction and functionality of the HMD.
Implementation Method 1
at least one eye-tracking sensor adjacent to a second side of the display and configured to obtain gaze information about a user by receiving reflected light, the reflected light being at least a portion of the light emitted from the at least one light source and reflected from eyes of the user
Data Source
AI summary
A head mounted display (HMD) apparatus may include: a display; an optical lens adjacent to a first side of the display; at least one light source configured to emit light; and at least one eye-tracking sensor adjacent to a second side of the display and configured to obtain gaze information about a user by receiving reflected light that is the light emitted from the at least one light source and reflected off eyes of the user. The display may include a second display region corresponding to a position of the at least one eye-tracking sensor, and a first display region other than the second display region. A number of pixels per unit area of the first display region may be greater than a number of pixels per unit area of the second display region.