Infrared Sensor Integrated Display Substrate for Near-Eye Eye Tracking
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Solution Overview
Problem
Existing near-eye display devices face challenges in achieving high-definition picture quality with low hardware requirements and power consumption, particularly due to inefficient eye tracking methods that rely on image recognition and additional camera systems.
Innovation Solution
The integration of an infrared sensor into the display substrate, which collects near-infrared rays reflected by the eye and determines the fixation position based on electrical signals, allowing for quicker tracking and higher refresh rates of the rendered image area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image recognition and additional camera systems are used for eye tracking, then eye tracking function is achieved, but hardware requirements and device complexity increase
Solution Approach 1:
The infrared sensor is integrated directly into the display substrate, merging the eye tracking sensing function with the display structure. This eliminates the need for separate camera systems and reduces hardware complexity while maintaining reliable eye tracking functionality through direct detection of infrared reflections from the user's eye
Solution Approach 2:
The display substrate serves multiple functions: it displays visual content and simultaneously performs eye tracking by detecting infrared reflections. The infrared sensor integrated into the substrate enables the display device to monitor user fixation points without requiring additional dedicated components, achieving multi-functionality with a single integrated structure
2Measurement precision
If image recognition methods are used for eye tracking, then eye position detection is achieved, but processing time and power consumption increase
Solution Approach 1:
The patent replaces complex image recognition processing with direct infrared detection. By using an infrared sensor to detect reflections from the user's eye, the system obtains eye position data through simple optical detection rather than complex image analysis, significantly reducing processing time while maintaining detection precision
Solution Approach 2:
The system changes the detection parameter from visible light image recognition to infrared reflection detection. This parameter change enables faster processing because infrared sensors can directly measure eye position based on reflection intensity without requiring the computational overhead of image recognition algorithms, thus reducing processing time while maintaining measurement precision
3Reliability
If additional camera systems are integrated, then eye tracking capability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The infrared sensor is manufactured as part of the display substrate using the same fabrication processes, merging two functions into a single manufacturing flow. This integration eliminates the need for separate assembly steps for camera systems and simplifies the manufacturing process while maintaining eye tracking capability
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 the load on the image graphic processing unit, decreases hardware requirements, and enhances the display effect by aligning with the focusing feature of human eyes, thereby improving user experience and reducing eye fatigue.
Implementation Method 1
The infrared sensor collects near-infrared rays reflected by the user's eye
Implementation Method 2
The infrared sensor includes a first electrode, a photoelectric conversion function layer and a second electrode that are arranged in a stacked manner
Data Source
AI summary
The display substrate includes a base substrate (101) including a display area (AA) and a peripheral area (BB) on at least one side of the display area (AA); and an infrared sensor (102) on the base substrate (101). The infrared sensor (102) is integrated in the peripheral area (BB). The infrared sensor (102) includes a first electrode (1021), a photoelectric conversion function layer (1022) and a second electrode (1023) that are arranged in a stacked manner. The first electrode (1021) is arranged adjacent to the base substrate (101), the second electrode (1023) is made of a transparent conductive material, and the infrared sensor (102) collects infrared rays reflected by an eye from a side where the second electrode (1023) is located.