Wearable Display Sensor Alignment for Hair Obstruction
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Solution Overview
Problem
Existing wearable display devices face challenges in accurately aligning the visual recognition direction of the viewer with the camera image, leading to reduced accuracy in external light detection and augmented reality functions, especially when users have long hair that blocks the camera lens.
Innovation Solution
A wearable display device is designed with an external light sensor, such as an illuminance sensor and a camera, positioned at the center between the eyes to overlap the emission direction of image light, reducing positional deviation and hair obstruction, and utilizing flexible boards for signal transmission to maintain accurate AR functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the camera is disposed on a side (lateral side) of the device, then the device structure is simplified, but positional displacement between the visual recognition direction of the viewer and the camera image occurs, reducing alignment accuracy
Solution Approach 1:
The patent transitions the camera placement from a lateral (side) position to a front position, changing the spatial dimension of sensor arrangement. This dimensional change allows the camera to capture images along the viewer's line of sight direction, eliminating positional displacement and improving alignment accuracy between the visual recognition direction and camera image.
2Device complexity
If the camera is disposed on a side of the device, then the device structure is simplified, but detection accuracy of external light and AR function is reduced
Solution Approach 1:
The patent repositions the camera from a lateral position to a front position, changing the spatial dimension of sensor arrangement. This allows the camera to detect external light and capture images along the viewer's line of sight, significantly improving detection accuracy for AR functions while maintaining reasonable device structure.
3Device complexity
If the camera is disposed on a side of the device, then the device structure is simplified, but the user's hair may block the front side of the camera lens, reducing function
Solution Approach 1:
The patent repositions the camera from a lateral position where it is vulnerable to hair blocking to a front position on the display device. This spatial reconfiguration places the camera in a location less susceptible to obstruction by the user's hair, thereby improving functional reliability while maintaining simplified device structure.
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 configuration enhances the accuracy of augmented reality functions and external light detection by aligning the sensor direction with the viewer's line of sight, improving positional accuracy and brightness detection while preventing hair interference.
Implementation Method 1
an external light sensor configured to sense external light
Data Source
AI summary
A display device configured to emit image light to display an image, and a camera or an illuminance sensor as an external light sensor configured to sense external light are provided, and the camera or the illuminance sensor is positioned to overlap a visually transparent light-guiding unit forming a front-of-eye part of the display device in an emission direction of the image light. Thus, the direction of sensing the external light in the illuminance sensor and the camera is set correspondingly to the direction of the line of sight of the viewer and a state, where these are located in the proximity of the eye of the viewer, is maintained.