HMD Image Position Adjustment via Optical Signal Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Binocular head-mounted displays face challenges in adjusting the relative positions of image display devices due to deformation or changes over time, leading to discrepancies in convergence angles and viewer fatigue, with existing methods lacking specific solutions for such adjustments.
Innovation Solution
The optical position adjustment method involves controlling image signals to adjust the positions of image display devices, using imaging devices to capture and correct image displacements, and adjusting convergence angles based on distance from the target, allowing for easy adjustment of image positions without mechanical components, reducing manufacturing steps and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical adjustment mechanisms are used to adjust image display device positions, then adjustment precision can be achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces mechanical adjustment mechanisms with an optical control system. Imaging devices capture the position of image display devices, and a controller calculates and applies optical correction to the image signals. This substitutes physical mechanical adjustment with electronic/optical signal processing, eliminating complex mechanical components while maintaining adjustment precision.
Solution Approach 2:
The patent changes the parameters of image signals (position, convergence angle) based on captured device positions. By dynamically adjusting signal parameters rather than physical component positions, the system achieves precise image alignment without mechanical movement, reducing device complexity while maintaining precision.
2Manufacturing precision
If frequent mechanical adjustment is performed to accommodate deformation, then image position accuracy is maintained, but manufacturing cost and complexity increase
Solution Approach 1:
The patent replaces repeated mechanical adjustment operations with a single setup of imaging and optical control devices. The system continuously monitors device positions through imaging devices and automatically corrects image signals, eliminating the need for frequent manual mechanical adjustments and reducing manufacturing complexity.
Solution Approach 2:
The system performs self-adjustment by automatically capturing device positions, calculating corrections, and applying optical control to image signals. This self-service mechanism eliminates the need for external manual adjustment operations, reducing manufacturing cost and complexity while maintaining position accuracy.
3Ease of operation
If convergence angle adjustment is added to image position adjustment, then viewer comfort is improved, but adjustment complexity increases
Solution Approach 1:
The patent merges image position adjustment and convergence angle adjustment into a single unified control system. The imaging device captures both position and convergence information, and the controller applies combined optical correction to image signals. This merging reduces the number of separate adjustment controls needed while improving viewer comfort through comprehensive alignment adjustment.
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 method enables easy optical adjustment of image display devices, reducing viewer fatigue and maintaining a comfortable viewing experience by accommodating changes in device positions and convergence angles, while minimizing manufacturing complexity and costs.
Implementation Method 1
The light guide plate 121 emits incident light that has propagated therein by total reflection
Implementation Method 2
The first deflection section 130 reflects incident light on the light guide plate 121 in such a manner that incident light is totally reflected in the light guide plate 121
Implementation Method 3
The second deflection section 140 causes light, that has propagated in the light guide plate 121 by total reflection, to be emitted from the light guide plate 121
Implementation Method 4
The collimating optics 112 shapes light, emitted from the pixels of the image forming device 111, into parallel beams
Implementation Method 5
The optical device 120 receives light shaped into parallel beams by the collimating optics 112, guides the beams therein and emits them
Data Source
AI summary
Disclosed herein is an optical position adjustment method of a head mounted display, the head mounted display including (a) an eyeglass type frame worn on the head of a viewer, and (b) two image display devices for the right and left eyes attached to the frame, and each of the image display devices including (A) an image forming device, and (B) an optical device adapted to receive, guide and emit light emitted from the image forming device, wherein the optical position adjustment method includes the step of: controlling an image signal that is supplied to the image forming device making up at least one of the image display devices so as to control the position of the image displayed on the optical device making up at least one of the image display devices and adjust the mutual positions of the two images.