Head-Mounted Display Gaze Detection Using Coated Surface
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Solution Overview
Problem
Conventional head-mounted displays are bulky and heavy due to the need for a hot mirror to detect gaze direction, which increases the size of the housing and weight, making them less suitable for being small and lightweight.
Innovation Solution
A head-mounted display design that uses an irradiation unit to emit invisible light, a display with a coated surface that transmits visible light and reflects invisible light, and an imaging device to capture the reflected invisible light for gaze detection, eliminating the need for a hot mirror and reducing the overall size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a hot mirror is arranged to reflect invisible light and transmit visible light for gaze detection, then gaze detection capability is improved, but the weight and size of the head mounted display increase
Solution Approach 1:
The patent extracts the invisible light reflection function from the hot mirror and integrates it directly into the display surface through coating. This separates the gaze detection function from the need for a separate hot mirror component, thereby reducing weight while maintaining detection capability.
Solution Approach 2:
The patent merges the invisible light reflective coating with the display surface, combining two functions (display and gaze detection) into a single integrated component. This eliminates the need for a separate hot mirror, reducing overall weight and simplifying the structure.
2Measurement precision
If a hot mirror is arranged to reflect invisible light for gaze detection, then gaze detection capability is improved, but the housing size increases
Solution Approach 1:
The patent extracts the reflection function from a separate hot mirror component and integrates it into the display surface coating. This eliminates the need for additional space to accommodate a separate hot mirror, thereby reducing housing size.
Solution Approach 2:
The patent combines the display surface and invisible light reflection function into a single integrated structure. This merger eliminates the need for separate components and associated mounting space, reducing the overall housing volume.
3Measurement precision
If a hot mirror is arranged between the eyes and monitor for gaze detection, then gaze detection capability is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the reflection function from a separate hot mirror component and integrates it into the display surface through coating. This simplifies the overall structure by eliminating the need for a separate hot mirror assembly and its associated mounting and alignment mechanisms.
Solution Approach 2:
The patent merges the display and gaze detection functions into a single integrated system. The display surface itself performs both light emission and invisible light reflection, eliminating the need for separate components and reducing structural complexity.
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
Enables smaller and lighter head-mounted displays while maintaining effective gaze detection capabilities, allowing for the detection of gaze direction without the bulkiness and weight associated with traditional designs.
Implementation Method 1
the display includes a coated surface formed on a surface thereof that transmits the visible light and reflects the invisible light
Implementation Method 2
the coated surface prevents the invisible light emitted from the display from reaching the imaging device
Implementation Method 3
an irradiation unit that irradiates the eyes of the user with invisible light
Implementation Method 4
the imaging device images the eyes of the user using the invisible light radiated from the irradiation unit, reflected by the eyes of the user, and reflected by the coated surface
Data Source
AI summary
A head mounted display that is mounted on the head of a user and used includes an irradiation unit that irradiates the eyes of the user with invisible light, a monitor that displays an image for the user to view wearing a glass for display that transmits visible light and reflects invisible light, an imaging device capable of capturing an image formed by the invisible light, and an output unit that outputs an image captured by the imaging device as an image for gaze detection, and the imaging device images the eyes of the user using the invisible light radiated from the irradiation unit, reflected by the eyes of the user, and reflected by the glass for display.