Eyepiece Display With Physiological Brightness Adaptation
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Solution Overview
Problem
Existing display systems struggle with unreliable brightness adaptation due to inaccurate external brightness sensing, orientation mismatches, and sensitivity limitations, leading to user discomfort and visual fatigue.
Innovation Solution
An image display device with adaptive brightness control using an eyepiece, illuminator, image sensor, and automatic control system that adjusts display brightness based on physiological variables such as pupil diameter, temperature, and heart rate, combined with ambient light sensing and user input, to ensure smooth transitions and reduce visual stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a brightness sensor is used to automatically control screen brightness, then brightness adaptation is improved, but the sensor can be hidden, covered, or misoriented leading to incorrect brightness information
Solution Approach 1:
The patent introduces an intermediary system consisting of an illuminator and image sensor that indirectly measures pupil diameter through optical imaging, rather than directly sensing external brightness. This intermediary approach bypasses the problems of direct brightness sensor placement and provides more reliable adaptation data.
Solution Approach 2:
The patent replaces the mechanical/optical brightness sensor system with a physiological measurement system using an image sensor to capture and analyze pupil diameter. This substitution transforms the measurement from external environmental sensing to internal physiological response detection.
2Ease of operation
If brightness is adjusted to match external environment, then user comfort in bright environments is improved, but user comfort in dark environments deteriorates
Solution Approach 1:
The patent implements a feedback loop where the image sensor continuously monitors pupil diameter, and the control system dynamically adjusts display brightness in real-time based on the measured physiological response. This closed-loop feedback ensures optimal comfort across varying environmental conditions.
Solution Approach 2:
The patent transitions from static brightness settings to dynamic brightness adjustment that continuously adapts to changing environmental conditions and individual user physiological responses. The system can smoothly transition between bright and dark mode optimizations.
3Measurement precision
If physiological sensors are added to measure pupil diameter, temperature, and heart rate, then brightness adaptation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent makes the image sensor serve multiple functions: capturing pupil diameter for brightness adaptation, and potentially detecting other physiological indicators. This multi-functionality reduces the need for separate dedicated sensors and mitigates complexity increases.
Solution Approach 2:
The patent combines the illuminator and image sensor into an integrated physiological measurement module that works together to detect pupil diameter and other biological signals. This merging of components streamlines the system architecture despite the added measurement capabilities.
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 provides reliable and comfortable brightness adaptation by closely matching display settings to user needs, reducing visual fatigue and stress through physiological variable-based adjustments.
Implementation Method 1
an illuminator (8) intended to illuminate the eye of the user accommodated by the eyepiece
Implementation Method 2
an image sensor (10) intended to collect an image of the user's eye accommodated by the eyepiece
Data Source
AI summary
A device for displaying images having adaptive brightness includes an eyepiece configured to accommodate at least one eye of a user, and a digital display in the visible range positioned behind the eyepiece. The display device further includes an illuminator configured to illuminate the eye of the user accommodated by the eyepiece, an image sensor configured to collect an image of the eye of the user accommodated by the eyepiece, and a system for the automatic control of brightness of the digital display on the basis of at least one physiological variable resulting from the image of the eye of the user.