Shared-Path Image Sensing Layout for Compact Head-Mounted Displays
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Solution Overview
Problem
Current head-mounted electronic devices have a high volume due to separate modules for different functions and limited radar beam coverage due to the number of antenna elements, making it difficult to integrate image and radar sensors optimally.
Innovation Solution
An image sensing device with a frame body, lens group, position adjuster, multiple antenna elements, and image sensing element, where the antenna elements are disposed adjacent to the lens group to share the same optical path, allowing for optimal sensing positions and adjustable beam directions through the position adjuster's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate modules with different functions are used in the head-mounted electronic device, then each function can be independently optimized, but the device volume increases
Solution Approach 1:
The patent combines the image sensing element and antenna elements into a single integrated module, where both components share the same optical path and physical space. The image sensing element captures reflected light beams while the antenna elements provide sensing beams to the target area, allowing both imaging and radar functions to coexist in one compact unit rather than requiring separate modules.
Solution Approach 2:
The integrated module serves multiple functions simultaneously: the lens group handles both optical imaging and radar beam transmission, the image sensing element performs optical sensing while antenna elements perform electromagnetic sensing, and the position adjuster controls both optical focus and radar beam direction. This multi-functionality reduces the overall device volume while maintaining independent optimization of each function.
2Device complexity
If the number of antenna elements is limited, then the device complexity is reduced, but the coverage of radar beams or the diversity characteristics of radar beams is limited
Solution Approach 1:
The patent introduces a position adjuster that enables the lens group to move dynamically within the accommodating space. This movement allows the same limited number of antenna elements to generate scanning beams in multiple different directions by changing the optical path and beam formation position. The dynamic positioning capability provides diverse radar beam coverage and enhanced adaptability without increasing the number of antenna elements.
Solution Approach 2:
The position adjuster adds a spatial dimension to the radar beam generation process. Instead of using more antenna elements in the same plane, the system moves the lens group along the optical axis and laterally, creating scanning beams in three-dimensional space. This dimensional approach to beam diversity allows limited antenna elements to achieve comprehensive coverage through spatial manipulation of the optical path.
3Reliability
If image and radar sensors are disposed at specific separate positions, then each sensor can be optimized for its function, but the device volume increases
Solution Approach 1:
The patent merges the image sensing element and antenna elements into a single integrated module where both sensors share the same optical path and physical location. The lens group serves both optical imaging and radar beam transmission functions, allowing both sensor types to be optimized for their respective functions while occupying the same space rather than requiring separate positions.
Solution Approach 2:
The integrated module structure nests the antenna elements and image sensing element within the same accommodating space of the frame body. The antenna elements are disposed on a second side of the lens group while the image sensing element is also disposed on the second side, creating a nested arrangement where multiple sensing functions are contained within a single compact module rather than requiring separate sensor positions.
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 reduces device volume, integrates sensors effectively, and provides adjustable beam directions, enhancing the sensing experience while offering an optical shock-absorbing effect.
Implementation Method 1
The sensing beams provided by the antenna elements are transmitted through the lens group to the target area to form scanning beams, and the reflected beams reflected from the target area are transmitted through the lens group to the image sensing element
Implementation Method 2
by configuring the position adjuster to move the lens group, an optical shock-absorbing effect may be provided
Data Source
AI summary
An image sensing device includes a frame body, a lens group, a position adjuster, multiple antenna elements, and an image sensing element. The frame body has an accommodating space. The lens group is disposed in the accommodating space. The position adjuster is connected between the lens group and the frame body, and configured to allow the lens group to move in the accommodating space. The antenna elements are disposed on a second side of the lens group, and configured to provide sensing beams to a target area. The image sensing element is disposed on the second side of the lens group, and configured to sense reflected light beams of the target area. In addition, a head-mounted display device is also provided.