HMD Housing Adjustment Member Bending for Head Size Adaptation
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Solution Overview
Problem
Head-mounted display devices often fail to accommodate varying head sizes, leading to discomfort and image recognition issues due to fixed optical paths, which necessitates multiple device sizes or adjustments that increase production costs and complexity.
Innovation Solution
Incorporating an adjustable member in the bridge of the eyeglass-shaped display device that bends to accommodate different head widths without altering the optical path, allowing for secure fitting and maintaining image quality across various head sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large-sized HMD is formed and secured by tightening, then the device can accommodate larger head sizes, but the wearer feels pain at the tightened portion and it is difficult to wear for a long time
Solution Approach 1:
The temple arm is designed with a bending mechanism that allows dynamic adjustment of the temple width. The adjustment member enables the temple arm to change its shape from a straight configuration to a bent configuration, allowing the device to adapt to different head sizes without requiring excessive tightening force, thereby reducing wearer discomfort.
Solution Approach 2:
The invention changes the geometric parameter of the temple arm by introducing a bending angle. By adjusting the bending degree of the temple arm through the adjustment member, the device can accommodate various head sizes while maintaining comfortable contact pressure, avoiding the pain caused by over-tightening.
2Adaptability or versatility
If a normal size HMD is used by a person with a large head, then the temples must be forcibly expanded, but this changes the incident angle of the image on the light guide plate or mirror, making the image unviewable
Solution Approach 1:
The temple arm incorporates a bending mechanism that allows the optical path to be dynamically adjusted. When the temple arm bends, the housing and optical components move together as a unit, maintaining the precise incident angles required for image viewing while accommodating larger head sizes.
Solution Approach 2:
The temple arm is divided into multiple segments or sections that can bend at specific joints. This segmentation allows the optical path to be flexibly adjusted without distorting the critical incident angles, as the bending occurs at designated points that preserve the optical alignment within each segment.
3Adaptability or versatility
If multiple device sizes are prepared to accommodate different head sizes, then all head sizes can be covered, but production costs and device complexity increase
Solution Approach 1:
The invention makes a single HMD design universal by incorporating an adjustable temple arm mechanism. This single device can serve multiple functions by accommodating different head sizes through the bending adjustment, eliminating the need to produce and manage multiple device variants for different head sizes.
Solution Approach 2:
The temple arm's bending capability transforms a static, fixed-size device into a dynamic, adjustable device. This dynamic feature allows one device design to adapt to various user requirements, replacing the need for multiple static device versions and simplifying production and inventory management.
Data Source
AI summary
A head-mounted display device includes a display element to display an image; a light guide member to emit the image displayed on the display element to an eye of a wearer; a housing including an optical system to guide image light of the image displayed on the display element to the light guide member; and an adjustment member provided on a side of the light guide member opposite to the optical system, and to bend the housing on a side opposite to a face of the wearer.