HMD Vibration Unit With Elastic Damping for Screen Stability
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Solution Overview
Problem
The addition of head haptic feedback in extended reality devices leads to shaking of the screen, compromising the immersive experience.
Innovation Solution
A vibration unit comprising a vibration motor, a pressing guide, an elastic member, and a main frame, which absorbs and filters energy to reduce screen shaking while maintaining immersive haptic sensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If head haptic feedback is added to provide immersive experience, then haptic sensation is improved, but screen shaking increases
Solution Approach 1:
The patent introduces an elastic member as an intermediary element between the vibration motor and the head-mounted display device. This elastic member acts as a mediator that transmits the necessary haptic vibrations to the user while simultaneously filtering out high-frequency vibrations that would cause screen shaking, thus resolving the contradiction between providing haptic feedback and maintaining screen stability
Solution Approach 2:
The patent changes the physical parameters of the vibration transmission system by using an elastic member with specific elastic coefficients. This modifies the vibration transmission characteristics, allowing selective transmission of beneficial haptic vibrations while attenuating harmful high-frequency vibrations that cause screen instability
2Reliability
If vibration motor is added for haptic feedback, then immersive experience is improved, but device complexity increases
Solution Approach 1:
The elastic member serves multiple functions simultaneously: it transmits vibration energy to provide haptic feedback, filters out harmful high-frequency vibrations, and acts as a mechanical connector between the vibration motor and the head-mounted display device. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
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
Reduces screen shaking by absorbing and filtering vibration energy, enhancing the immersive experience through controlled haptic feedback.
Implementation Method 1
the elastic member is arranged around the pressing rod and is located between the pressing plate of the pressing guide and the main frame
Implementation Method 2
the elastic member arranged around the pressing rod and located between the pressing plate of the pressing guide and the main frame
Data Source
AI summary
A vibration unit and a head-mounted display device are provided. The vibration unit includes a vibration motor, a vibration motor mount, a pressing guide, a main frame and an elastic member, the pressing guide including a pressing rod and a pressing plate, and a through hole being provided in either end of the main frame. The vibration motor is in the vibration motor mount fixedly connected to a first surface of the pressing plate; a second surface of the pressing plate abuts against a first end of the pressing rod, and a second end of the pressing rod passes through the through hole and is moveably connected to the main frame; the elastic member is around the pressing rod and is between the pressing plate and the main frame; and the main frame includes a connecting base configured to be connected to the head-mounted display device.