Head-Mounted Display Cushion for Light Sealing
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Solution Overview
Problem
Existing head-mounted displays often suffer from a gap between the display device and the user's face, allowing external light to enter and degrade the quality of the display image.
Innovation Solution
The head-mounted display incorporates a configuration with a rotation moment generated by the weight of the display device, pressing it against the user's face, and a cushion material with varying elastic moduli and thicknesses to fill the gap and suppress external light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hinge mechanism is used to allow free rotation of the display device, then the ease of operation is improved, but a gap occurs between the display device and the user's face allowing external light to enter
Solution Approach 1:
A cushion member is introduced as an intermediary element between the display device and the user's face. This cushion member fills the gap that would otherwise allow external light to enter, while still permitting the display device to be positioned at various angles through the hinge mechanism. The cushion member acts as a mediator that maintains both the adjustability function and the light-blocking function.
Solution Approach 2:
The cushion member is made of a flexible material that can deform to accommodate the hinge mechanism's rotation while maintaining contact with the user's face. This flexible structure allows the display device to be adjusted to different positions while the cushion member continuously fills the gap to prevent external light from entering.
2Object-affected harmful factors
If the display device is pressed firmly against the user's face to eliminate gaps, then the quality of display image is improved, but the comfort of wearing is degraded
Solution Approach 1:
The cushion member is designed with specific material parameters (elastic modulus, hardness) that allow it to deform under pressure to fill gaps and block external light, while its compliant nature distributes the pressure over a larger area and reduces the peak pressure on the user's face. This parameter optimization resolves the contradiction between light blocking effectiveness and wearing comfort.
3Device complexity
If a simple hinge structure is used, then the device complexity is reduced, but the ability to suppress external light is insufficient
Solution Approach 1:
The cushion member serves multiple functions simultaneously: it acts as a cushioning element for comfort, a sealing element to block external light, and a structural component that maintains the gap between the display device and the user's face. This multi-functionality allows a relatively simple hinge structure to achieve both adjustability and light suppression.
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 effectively improves the quality of the display image by minimizing the influence of external light and ensuring a stable fit of the display device against the user's face.
Implementation Method 1
a cushion material 15 with varying elastic moduli and thicknesses to fill the gap and suppress external light
Implementation Method 2
a configuration with a rotation moment generated by the weight of the display device, pressing it against the user's face
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
In a head-mounted display, a display device (10) includes: a device body (11) on which a rotational moment acts in a direction toward a user's face (51) around a hinge (20); and a cushion material (15) provided at a peripheral edge of an opposing part (11a) facing the user's face (51) in the device body (11) and brought into contact with the user's face (51). The cushion material (15) includes: an upper cushion part (15a) positioned at an upper part of a peripheral edge of the opposing part (11a); and a lower cushion part (15b) positioned below the upper cushion part (15a). The lower cushion part (15b) has a thickness greater than that of the upper cushion part (15a).