Head-Mounted Display Optical Path for Split-Direction Distortion Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing head-mounted display apparatuses impose a large load on processing units due to inverse distortion correction in both vertical and horizontal directions, leading to inefficiencies.
Innovation Solution
A head-mounted display apparatus with a control unit that corrects video distortion in a first direction using a first optical member and a reflection member, while the control unit addresses distortion in a second direction crossing the first, employing a display element and optical system to minimize load on processing units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the processing unit performs inverse correction for distortion in both vertical and horizontal directions, then the distortion of the virtual image is corrected, but the load on the processing unit becomes large
Solution Approach 1:
The patent divides distortion correction into two separate segments: (1) optical system correction for vertical direction distortion using aspherical surfaces and/or cylindrical lenses, and (2) processing unit correction for horizontal direction distortion through image processing. This segmentation allows each component to handle only part of the correction task, reducing the overall processing load while maintaining comprehensive distortion correction
Solution Approach 2:
The patent replaces part of the computational correction task with optical correction. By using aspherical surfaces and cylindrical lenses in the optical system, the vertical direction distortion is corrected optically rather than computationally, substituting mechanical/optical means for electronic processing and thereby reducing the processing unit's burden
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
The apparatus effectively reduces distortion in both vertical and horizontal directions, ensuring clear and efficient virtual image projection without overburdening the processing unit, allowing for a more compact and robust design.
Implementation Method 1
a reflection member configured to reflect the video light from the first optical member to project a virtual image corresponding to the video
Data Source
AI summary
A head-mounted display apparatus includes a control unit configured to correct a video, a display element configured to display the video corrected by the control unit, a first optical member on which video light corresponding to the video is incident, and a reflection member configured to reflect the video light from the first optical member to project a virtual image corresponding to the video. The first optical member and the reflection member correct distortion of the virtual image in a first direction. The control unit corrects the video based on distortion of the virtual image in a second direction crossing the first direction.