Eyesight-Adjustable Optical Device With Position-Based Distortion Correction
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Solution Overview
Problem
Electronic devices for VR and AR suffer from varying degrees of distortion aberration when adjusting for different eye sights, leading to insufficient image correction and quality issues, particularly in wearable devices that need to be thin and lightweight.
Innovation Solution
An electronic device with a display panel and a first lens, where the optical axis intersects perpendicularly with the display portion, and a position adjustment mechanism that changes the size and distortion rate of the image displayed based on the distance between the lens and the display panel, using components like a cylindrical cam and stepper motor to adjust the lens position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a position adjustment mechanism is used to adjust the distance between the lens and display panel for eyesight adjustment, then adaptability to different eyesights is improved, but device complexity increases
Solution Approach 1:
The patent implements a position adjustment mechanism that allows the lens to move dynamically relative to the display panel, enabling eyesight adjustment for different users. The mechanism includes a lens holder that can be positioned at multiple locations along the optical axis, transforming a static optical system into a dynamic one that adapts to varying eye conditions.
Solution Approach 2:
The optical device is segmented into distinct functional components: a display panel, a movable lens, a lens holder with multiple positioning locations, and a position adjustment mechanism. This segmentation allows independent optimization of each component and simplifies the overall structure by assigning specific functions to separate elements.
2Adaptability or versatility
If the distance between lens and display panel is changed for eyesight adjustment, then eyesight adaptability is improved, but image quality deteriorates due to varying distortion aberration
Solution Approach 1:
The patent applies different distortion correction parameters to the displayed image based on the detected lens position. When the lens is at different locations along the optical axis, the system changes the distortion correction parameters accordingly, ensuring that the image maintains proper geometric accuracy despite the varying optical path length.
Solution Approach 2:
The position adjustment mechanism includes a detection function that monitors the lens position and provides feedback to the control system. This feedback enables the system to automatically adjust the distortion correction parameters to match the current lens position, maintaining image quality across different eyesight adjustment settings.
3Reliability
If multiple lenses are used in the optical device, then optical performance is improved, but device weight increases
Solution Approach 1:
The patent employs a compact lens arrangement where multiple lenses are nested or closely integrated within a limited space. The lenses are positioned in sequence along the optical axis with minimal spacing, creating a compact optical train that maintains high optical performance while minimizing overall device weight and volume.
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 device provides clear, high-quality images with minimal distortion regardless of the user's eyesight, maintaining a thin and lightweight design.
Implementation Method 1
A display apparatus including an organic EL element does not need a backlight that is necessary for a liquid crystal display apparatus; thus, a thin, lightweight, high-contrast, and low-power display apparatus can be achieved.
Implementation Method 2
The optical device is equipped with a plurality of lenses and inevitably produces some distortion aberration that makes straight lines appear curved.
Implementation Method 3
there is a problem where the degree of distortion aberration varies when a distance between components of the optical device is changed for the eyesight adjustment
Data Source
AI summary
An electronic device with which a user can see an image with less distortion is provided. The electronic device includes a display apparatus and an optical device. The optical device includes a position adjustment mechanism and can perform eyesight adjustment. The display apparatus displays a correction image that has been distorted from an original image into a barrel shape to correct distortion aberration of a lens. A correction amount of the correction image (a size and a distortion rate of the image) is changed according to the position of the lens moved by the position adjustment mechanism. This enables the image to be corrected to an optimal state at all times even when the position of the lens is moved for the eyesight adjustment and thereby improves the quality of the image to be seen.