AR Glasses Depth Control via Pseudo-Pinhole Mirror
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Solution Overview
Problem
Conventional augmented reality glasses-type apparatuses face challenges in allowing users to simultaneously focus on both real-world and virtual images without additional effort, are bulky, and inconvenient to wear due to weight and volume, and have a disharmonious appearance.
Innovation Solution
An apparatus with a depth of field control function using a circular or elliptical mirror of specific sizes (50-700 μm) to increase the depth of field of virtual images, allowing them to be reflected and viewed naturally alongside real-world images, integrated into a frame for wearing, similar to existing glasses or goggles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent prism is used to reflect the virtual image, then the virtual image can be displayed, but the apparatus becomes bulky and heavy
Solution Approach 1:
The patent extracts the essential function of the transparent prism (reflecting virtual image) and implements it using a much simpler mirror structure. The mirror is positioned to reflect the virtual image from the display unit into the user's eye, achieving the same function with minimal weight and volume.
Solution Approach 2:
Instead of using a complex transparent prism structure, the patent uses a simple mirror to copy the light reflection function. The mirror creates a virtual image of the display unit, which is then superimposed on the real world view, achieving the augmented reality effect with a lightweight component.
2Reliability
If a transparent prism is used to reflect the virtual image, then the virtual image can be displayed, but the apparatus volume increases
Solution Approach 1:
The patent extracts the essential function of the transparent prism (reflecting virtual image) and implements it using a much simpler mirror structure. The mirror is positioned to reflect the virtual image from the display unit into the user's eye, achieving the same function with minimal weight and volume.
Solution Approach 2:
The patent optimizes the spatial arrangement by positioning the mirror at a specific angle and location within the frame. The mirror is placed close to the user's eye and angled to reflect the virtual image from the display unit, utilizing three-dimensional space efficiently to minimize the overall apparatus volume.
3Adaptability or versatility
If projectors and transparent prisms are installed in front of both eyes, then both eyes can view the virtual image, but the apparatus slides down and is difficult to wear
Solution Approach 1:
The patent implements a universal design where a single lightweight frame structure supports the augmented reality components for both eyes. The frame is designed to be worn like conventional glasses, distributing the weight evenly across the nose and ears, making it comfortable for extended wear while providing binocular viewing capability.
4Reliability
If a conventional glasses-type apparatus is used, then augmented reality can be displayed, but the appearance is disharmonious
Solution Approach 1:
The patent applies local quality by making only the necessary parts visible (the minimal mirror and display unit components) while keeping the rest of the frame aesthetically pleasing and similar to conventional glasses. The frame design prioritizes appearance harmony while maintaining the augmented reality functionality.
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
Enables clear and simultaneous focus on both real-world and virtual images without additional effort, with a lightweight, compact design that is aesthetically harmonious and easy to wear, improving user experience and convenience.
Implementation Method 1
a circular depth of field control unit configured to have a size in a range from 50 to 700 μm, and also configured to reflect the virtual image generated in the display unit
Implementation Method 2
controlling depth of field and focus and also preventing an image from being blurred due to diffraction by using a pseudo-pinhole effect
Data Source
AI summary
The present invention relates to an apparatus equipped with a depth of field control function for enabling augmented reality, which is capable of controlling the depth of field and focus and also preventing an image from being blurred due to diffraction by using a pseudo-pinhole effect. The apparatus includes: a display unit configured to generate a virtual image; a circular depth of field control unit configured to have a size in a range from 50 to 700 μm, and also configured to reflect the virtual image generated in the display unit, to increase the depth of field of the virtual image, and to then enable the virtual image to reach an eye of the user; and a frame part configured such that the display unit and the depth of field control unit are installed thereon or therein, and also configured to enable the user to wear the apparatus for enabling augmented reality.