Head-Mounted Display Infrared 3D Coordinate Detection
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Solution Overview
Problem
Existing head-mounted displays are unable to detect the three-dimensional coordinates of objects in dark environments and struggle to maintain accurate detection when the user's head moves, due to the lack of active illumination and independence from input/output devices.
Innovation Solution
A head-mounted display equipped with an infrared light irradiation section and detection section, which computes three-dimensional coordinates by projecting a pattern of infrared light and detecting its reflection, allowing for accurate coordinate calculation even in dark environments and during head movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If active illumination is not provided, then the device structure is simpler, but the device cannot detect object positions in dark environments
Solution Approach 1:
The patent changes the wavelength parameter of light from visible to infrared, allowing the illumination to work in dark environments while being imperceptible to users. The infrared light irradiation section emits infrared light that reflects off objects and is detected by the infrared light detection section, enabling position detection without visible illumination.
2Adaptability or versatility
If the head-mounted display moves with user head movements, then the device adapts to user positioning, but the detection accuracy of object coordinates deteriorates
Solution Approach 1:
The control section receives detection results from the infrared light detection section and calculates the position of the object relative to the user's line of sight. The system continuously updates the coordinate information based on head movement feedback, maintaining accurate relative positioning despite changes in absolute orientation.
Solution Approach 2:
The patent introduces a third dimension (depth) to the coordinate system by calculating the position of objects along the line of sight direction in addition to horizontal and vertical positions. This three-dimensional coordinate approach allows accurate object localization regardless of head orientation changes.
3Measurement precision
If infrared light irradiation and detection sections are placed at a distance, then the three-dimensional coordinate computation is more accurate, but the device size increases
Solution Approach 1:
The control section dynamically adjusts the processing of detection results based on the geometric relationship between the infrared light irradiation section, detection section, and detected objects. The system calculates three-dimensional coordinates by processing the detection results in conjunction with the known spatial relationship between components, achieving accurate measurement without requiring large physical separation.
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 the head-mounted display to compute three-dimensional coordinates of objects in dark places and adapt to head movements, enhancing user interaction and input operations by maintaining accurate detection and input functionality.
Implementation Method 1
an infrared light irradiation section that irradiates the object to be detected with a predetermined pattern of infrared light
Implementation Method 2
an infrared light detection section that detects the infrared light reflected by the object to be detected
Data Source
AI summary
A mounting section (2) for a user to mount on his/her head includes an infrared light irradiation section (5) that irradiates an object to be detected (21) with a predetermined pattern of infrared light and an infrared light detection section (6) that detects the infrared light reflected by the object to be detected (21). The infrared light irradiation section (5) and the infrared light detection section (6) are placed at a predetermined distance from each other. The three-dimensional coordinates of the object to be detected (21) are computed from a predetermined pattern of reflection from the object to be detected (21) as obtained by the infrared light detection section (6).