Adjustable Image Distance Mechanism for Data Eyeglasses
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Solution Overview
Problem
Existing data eyeglasses face challenges in maintaining a consistent and comfortable image distance for virtual images due to manufacturing tolerances and environmental factors, affecting user experience and image perception.
Innovation Solution
The implementation of an adjustable image distance mechanism in data eyeglasses, utilizing either actuators connected to the image generator for displacement and tipping, or wavefront manipulators with freeform surfaces, allows for precise adjustment of the virtual image distance to compensate for tolerances and individual user preferences, ensuring a consistent and comfortable viewing experience across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed imaging optics is used to generate a virtual image, then the device structure is simple, but the image distance varies due to manufacturing tolerances and environmental factors
Solution Approach 1:
The patent implements an adjustable imaging optics system where the focal length can be dynamically changed to compensate for variations in image distance. This allows the system to adapt to manufacturing tolerances and environmental changes, maintaining consistent virtual image perception without requiring extremely precise fixed manufacturing.
2Adaptability or versatility
If the image generator is displaced along the optical axis, then the image distance is adjusted, but the device complexity increases
Solution Approach 1:
The patent divides the adjustment function into multiple independent actuators (first and second actuators) that can independently adjust different parameters of the imaging optics. This segmentation allows for fine-grained control of image distance while keeping each individual actuator relatively simple.
3Ease of operation
If actuators are used to adjust the image generator position, then image distance can be controlled, but the device becomes more complex
Solution Approach 1:
The patent employs actuators that convert electrical signals into mechanical displacement, replacing purely mechanical adjustment mechanisms. This allows for precise electronic control of image distance while maintaining relatively simple actuator structures, improving ease of operation through electronic control interfaces.
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 solution enables data eyeglasses to maintain a consistent and comfortable image distance for users, accommodating different operating and ambient conditions, and allowing for content-dependent adjustments, thereby enhancing user experience and image quality.
Implementation Method 1
an imaging optics arranged between the image generator and the eyeglass lens for producing a virtual image from the output image
Implementation Method 2
wavefront manipulators with freeform surfaces, allows for precise adjustment of the virtual image distance
Data Source
AI summary
An imaging device includes at least one eyeglass lens to be worn in front of the eye and a display device arranged in the edge region of the eyeglass lens, said display device including an image generator and an imaging optics arranged between the image generator and the eyeglass lens. The image generator is the start point of an imaging beam path which generates the virtual image having an image distance on the basis of the output image and which penetrates into the eyeglass lens by means of the imaging optics via the edge region of the eyeglass lens. An outcoupling device for outcoupling the imaging beam path in the direction of the eye is provided in the eyeglass lens. The display device comprises a device for adjusting the image distance of the virtual image. The invention also relates to data eyeglasses comprising an imaging device.