Optical Variable Unit for Headset Alignment
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Solution Overview
Problem
Conventional electronic devices for Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR) lack the ability to adjust optical alignment between the left and right lenses, leading to suboptimal 3D effects due to changes in user physical conditions, necessitating bulky metal structures to prevent lens deviation.
Innovation Solution
An electronic device with adjustable optical alignment, featuring frames made of elastic material that deform to accommodate different head sizes, and an optical variable unit that corrects lens alignment using sensors and a controller to shift images and adjust the angle of projection, ensuring accurate optical alignment without the need for metal structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal structure (optical chassis, optical bench) is inserted to physically prevent deviation between lenses, then optical alignment stability is improved, but device size and weight increase
Solution Approach 1:
The patent replaces the mechanical metal structure (optical chassis/bench) with an optical compensation system using a second display, controller, and sensor. Instead of mechanically preventing lens deviation, the system optically compensates for it by shifting the image on the second display based on detected alignment deviation, thereby achieving the same alignment stability without the weight penalty of metal structures.
Solution Approach 2:
The patent changes the parameter being controlled from physical lens position (mechanical approach) to image position on the display (optical approach). By detecting lens deviation and compensating through image shifting on the second display, the system maintains optical alignment stability without requiring rigid mechanical structures, thus reducing device weight.
2Reliability
If a metal structure (optical chassis, optical bench) is inserted to physically prevent deviation between lenses, then optical alignment stability is improved, but device volume increases
Solution Approach 1:
The patent replaces the voluminous metal optical chassis/bench with a compact optical-electronic system comprising a second display, controller, and sensor. This substitution eliminates the need for large rigid mechanical structures while maintaining alignment stability through software-based image shifting, thereby reducing device volume.
Solution Approach 2:
The patent creates a virtual copy of the first display's image on the second display and dynamically adjusts its position. This optical copying approach replaces the need for precise mechanical positioning of physical lenses, allowing alignment compensation without bulky mechanical components, thus reducing device volume.
3Adaptability or versatility
If frames are made of elastic material to deform and accommodate different head sizes, then adaptability is improved, but manufacturing precision becomes more difficult
Solution Approach 1:
The patent introduces a feedback mechanism where a sensor detects the actual optical alignment deviation caused by frame deformation, and a controller uses this feedback information to shift the image on the second display for compensation. This closed-loop feedback system enables elastic frames to maintain precise optical alignment despite deformation, resolving the contradiction between adaptability and manufacturing precision.
Solution Approach 2:
The system enables the elastic frame structure to self-adjust for alignment issues through the sensor-controller-display compensation mechanism. The frame deforms naturally to accommodate different head sizes, and the optical alignment is automatically corrected by the control system, eliminating the need for high-precision manufacturing of the elastic components themselves.
Data Source
AI summary
An electronic device is disclosed. The electronic device comprises: a first display for the left eye of a user; a second display for the right eye of the user, that is spaced apart from the first display in a one direction; frames that hold the first display and the second display and are supported on the user's head; and an optical variable unit capable of varying the optical alignment of the first display or second display. An electronic device according to the present invention may be associated with an artificial intelligence module, robot, augmented reality (AR) device, virtual reality (VR) device, and device related to 5G services.