Infrared Eye Tracking in Display Substrates
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Solution Overview
Problem
Current eye locating techniques in display devices require complex image processing, are costly, and have low accuracy due to the need for real-time eye location adjustment.
Innovation Solution
Incorporating an infrared light emitting unit and multiple infrared light sensing units in a display panel or substrate to detect the intensity of infrared light reflected from a human eye, allowing for accurate eye location determination without complex image processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex image processing is used for eye locating, then eye location can be obtained, but computational complexity and cost increase while accuracy decreases
Solution Approach 1:
The patent extracts only the essential information needed for eye location (infrared light intensity reflected from the eye) while discarding unnecessary complex image processing steps. By using infrared sensing units to detect specific reflected light intensity, the system obtains eye location data directly without requiring full image processing pipelines, thus reducing computational complexity while maintaining measurement precision.
Solution Approach 2:
The patent replaces complex computational image processing mechanisms with a simpler optical detection mechanism. Instead of using cameras and computer vision algorithms to process images for eye location, the system uses infrared light emitting units and sensing units to detect reflected infrared light intensity, substituting a complex mechanical/computational system with a more direct optical measurement approach.
2Adaptability or versatility
If real-time eye location adjustment is implemented, then display can be adjusted according to eye location, but cost increases
Solution Approach 1:
The patent makes the display panel itself multi-functional by integrating both display functionality and eye location detection functionality into a single device. The infrared light emitting units and sensing units are incorporated directly into the display panel structure, allowing the same device to both display information and track eye location in real-time, thereby achieving adaptability without requiring separate dedicated eye-tracking hardware systems.
Solution Approach 2:
The patent merges the eye location detection system with the display panel by integrating the infrared light emitting units and sensing units directly into the display structure. This combination eliminates the need for separate external eye-tracking devices, reducing overall system cost while maintaining real-time display adjustment capability based on eye location.
3Measurement precision
If multiple infrared light sensing units are used, then eye location accuracy improves, but device structure becomes more complex
Solution Approach 1:
The patent applies local quality by strategically positioning infrared light sensing units at specific locations on the display panel (such as corners or edges) rather than distributing them uniformly. This localized arrangement optimizes the detection of reflected infrared light from the eye while minimizing structural complexity, as the sensing units are placed only where they are most effective for eye location determination.
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 approach reduces computational complexity and costs while achieving high accuracy in eye location tracking by analyzing the intensity of infrared light reflected from the eye, eliminating the need for intricate image processing.
Implementation Method 1
the infrared light emitting unit is an infrared light emitting diode provided in the display area
Implementation Method 2
detecting intensity of the infrared light emitted from the light exit side of the display panel and reflected by a human eye
Data Source
AI summary
A display panel has a light exit side and includes an infrared light emitting unit for emitting infrared light towards the light exit side of the display panel; and at least three infrared light sensing units provided at different positions for detecting intensity of the infrared light emitted from the light exit side of the display panel and reflected by a human eye.