Display Device Spherical Bearing Adjustment Mechanism
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Solution Overview
Problem
Display devices for virtual and augmented reality often experience deviations in imaging angles during assembly, use, or movement, affecting imaging quality.
Innovation Solution
An adjustable optical assembly with a spherical bearing, connecting rod, and cover mechanism that allows for precise adjustment and fixation of the imaging angle, utilizing a friction layer and elastic components to stabilize the spherical bearing within a recessed frame, enabling multiple directional adjustments of the optical assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical assembly is fixed rigidly in the frame, then the imaging angle remains stable, but the device cannot adapt to deviations caused by assembly or movement
Solution Approach 1:
The patent applies the dynamics principle by replacing the rigid fixed connection with a movable joint mechanism comprising a spherical bearing, connecting rod, and cover. This allows the optical assembly to dynamically adjust its position and imaging angle while maintaining stability when needed, resolving the contradiction between fixed stability and adaptive flexibility.
Solution Approach 2:
The patent implements parameter changes by enabling the imaging angle to be adjusted within a specific range through the movable joint mechanism. The system can change the angular parameter of the optical assembly relative to the frame, allowing adaptation to different assembly deviations and usage conditions while maintaining reliable imaging when positioned correctly.
2Adaptability or versatility
If the optical assembly is made adjustable to correct imaging angle deviations, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the adjustment mechanism into distinct functional components: a spherical bearing for positional adjustment, a connecting rod for transmission, and a cover for fixation. This modular segmentation allows each component to perform its specific function independently, achieving complex adjustment capability while maintaining manageable structural complexity.
Solution Approach 2:
The patent uses an intermediary approach by introducing a spherical bearing as a mediator between the fixed frame and the movable optical assembly. This intermediary component enables smooth adjustment and positioning while simplifying the overall mechanism compared to direct rigid connections with multiple adjustment points.
3Adaptability or versatility
If the spherical bearing is allowed to move freely for adjustment, then adjustability improves, but positioning stability deteriorates
Solution Approach 1:
The patent implements preliminary anti-action by using the cover to pre-apply a limiting force on the spherical bearing. The cover can be positioned to prevent the bearing from moving beyond the desired adjustment range, providing preliminary stabilization that maintains positioning accuracy while still allowing necessary adjustment movements.
Solution Approach 2:
The patent applies dynamics by designing the spherical bearing mechanism to be movable during adjustment but stabilizable when positioned. The system transitions between mobile and fixed states, allowing free movement for correction of imaging angle deviations, then stabilizing once the correct position is achieved through the cover constraint.
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 solution ensures stable and precise adjustment of the imaging angle, enhancing the imaging quality and user experience by allowing for customizable positioning of the optical assembly relative to the user's perspective.
Implementation Method 1
a spherical bearing (31), wherein a part of the spherical bearing (31) is received in a recess (20a) formed in the frame (20) and movably abuts against an inner surface defining the recess (20a)
Data Source
AI summary
A display device includes an optical assembly for displaying images, a frame, and an adjustment assembly including a spherical bearing a connecting rod, and a cover. The frame and the optical assembly are arranged at intervals, a first recess is concave in a first direction from the frame, a through hole penetrates the frame and communicates with the first recess; a part of the spherical bearing is received in the first recess and abuts against an inner surface defining the first recess; the connecting rod extends through the through hole, one end of the connecting rod is fixed to the spherical bearing, and the other end is connected to the optical assembly; the cover is arranged on a side of the spherical bearing facing away from the frame and adjustably connected to the frame in the first direction to selectively apply or remove a pressure to the spherical bearing.