Eye Tracking Display Control for Glare Reduction
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Solution Overview
Problem
Glare and bright light from rear or front vehicles can affect driver vision and safety, and existing solutions like coated materials on rearview mirrors and windshields reduce transparency, while head-up displays can be misaligned due to driver head movement.
Innovation Solution
An eye tracking-based display control system that includes a main body, image capture devices, a controller, and a transparency controllable film, which adjusts the transparency of a local region of the film based on the driver's eye position and light source brightness to reduce glare and misalignment of navigation images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If coated materials are applied on rearview mirror or front windshield to prevent glare, then glare prevention is improved, but transparency is reduced
Solution Approach 1:
The patent employs a transparency controllable film that can dynamically adjust its transparency level based on detected light conditions and eye position. Unlike static coated materials, this film can switch between transparent and opaque states or adjust intermediate transparency levels, allowing it to block glare when needed while maintaining visibility when conditions permit.
Solution Approach 2:
The system adjusts transparency locally rather than uniformly across the entire surface. By detecting the position of light sources and driver's eyes, the control system modifies transparency only in specific regions where glare occurs, preserving overall visibility and navigation image quality while targeting harmful light precisely.
2Adaptability or versatility
If head-up display is used for navigation, then navigation functionality is added, but image alignment is compromised due to driver head movement
Solution Approach 1:
The system incorporates real-time feedback through image capture devices that continuously monitor driver's eye position and head orientation. This feedback loop allows the navigation unit to dynamically adjust the position and orientation of displayed navigation images, ensuring they remain accurately aligned with the driver's field of view despite head movements.
Solution Approach 2:
The display system serves multiple functions: it displays navigation images, monitors driver eye position, detects light sources, and adjusts transparency control patterns simultaneously. This multi-functionality allows the same system to provide navigation assistance while maintaining accurate alignment through continuous eye tracking and adaptive positioning.
3Object-affected harmful factors
If transparency controllable film is used to reduce glare, then glare prevention is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into a unified system: the transparency controllable film serves both as a glare reduction mechanism and as a display medium for navigation images. The control system combines light source detection, eye position tracking, and transparency adjustment into a single integrated architecture, reducing overall system complexity despite the advanced 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
Effectively reduces glare and bright light impact on drivers by dynamically adjusting the transparency of the film according to the driver's eye position, improving visibility and navigation accuracy.
Implementation Method 1
a transparency controllable film... according to which transparency of a local region of the transparency controllable film corresponding to the light source is changed
Data Source
AI summary
An eye tracking-based display control system includes a main body accommodating a mirror; a first image capture device disposed on the main body and facing a first direction to capture a first image; a controller receiving and processing the first image; and a transparency controllable film disposed on an opposite side of the mirror against the main body. In response to a determination that a light source on the first image has brightness higher than a predetermined threshold, and a determination that a shift distance of eyes between an eye position and an initial position of a driver is not zero, the controller calibrates an original position of the light source according to the shift distance of the eyes and an initial coordinate system, thereby obtaining a calibrated position, according to which transparency of a local region of the transparency controllable film corresponding to the light source is changed.