Self-Luminous Display With Infrared Pixels for Gaze Tracking
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Solution Overview
Problem
Current wearable electronic devices face challenges in tracking user gaze and detecting real objects efficiently, particularly in low-illuminance environments, and struggle with compensating for defective pixels in augmented reality displays.
Innovation Solution
A wearable electronic device incorporating a self-luminous display with both visible and infrared pixels, a half mirror for reflecting or transmitting infrared light, and a transparent cover featuring a birefringent plate, liquid crystal element, and polarizer to generate adjusted images, which helps in gaze tracking and real object detection, and compensates for defective pixels by outputting multiple adjusted images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate infrared light emitting element is used for gaze tracking, then gaze tracking function is achieved, but device structure becomes more complex and requires additional space
Solution Approach 1:
The display device performs multiple functions: it displays images to the user while simultaneously serving as an infrared light source for gaze tracking. The display pixels can emit both visible light for imaging and infrared light for eye tracking, eliminating the need for a separate infrared light emitting element and reducing device structural complexity
Solution Approach 2:
The patent combines the display function and infrared light emission function into a single integrated component. The display device merges the roles of image display and gaze tracking light source, thereby simplifying the overall device structure and reducing the number of required components
2Manufacturing precision
If multiple adjusted images are output through transparent cover to compensate for defective pixels, then image quality is improved, but device complexity increases
Solution Approach 1:
The transparent cover acts as an intermediary optical element that manipulates light paths to generate multiple adjusted images. By using the transparent cover with birefringent plates and liquid crystal elements, the system can compensate for defective pixels through optical manipulation rather than requiring complex electronic image processing or additional display elements
Solution Approach 2:
The patent uses optical dimensionality by manipulating light paths through the transparent cover to create multiple images from a single display. This approach compensates for defective pixels by generating alternative image paths optically, rather than requiring additional display pixels or complex electronic redundancy
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 device effectively tracks user gaze and detects real objects, even in low-light conditions, while improving image quality by mitigating defective pixels through interpolated image generation, resulting in enhanced augmented reality experiences.
Implementation Method 1
a half mirror configured to output reflected infrared light and transmitted infrared light in response to the output infrared light
Implementation Method 2
the transparent cover including at least one birefringent plate, at least one liquid crystal element, and a polarizer
Implementation Method 3
the transparent cover including at least one birefringent plate, at least one liquid crystal element, and a polarizer
Data Source
AI summary
A wearable electronic device with a display is provided. The wearable electronic device includes: a stereo camera configured to detect infrared light, a self-luminous display including a plurality of visible light pixels configured to output visible light corresponding to a virtual object image and a plurality of infrared pixels configured to output infrared light, an optical waveguide configured to output the virtual object image by adjusting a path of the visible light, a first control circuit configured to supply driving power and a control signal to the self-luminous display, and a second control circuit configured to supply driving power and a control signal to the stereo camera. The optical waveguide includes a half mirror configured to output reflected infrared light and transmitted infrared light in response to the output infrared light.