Elastic Micro Lens Array for Automatic Focal Length Adjustment
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Solution Overview
Problem
Current virtual reality devices require manual adjustments and external devices to determine the distance between the user and the display, which limits user immersion and independence.
Innovation Solution
A virtual reality device equipped with an imaging device featuring an elastic micro lens array and a processor that adjusts focal lengths based on predetermined image data, using a neural network model to optimize lens positions and deformations for clear image display without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment methods are used to determine user-display distance, then device complexity is reduced, but ease of operation deteriorates due to requiring manual intervention
Solution Approach 1:
The system uses an imaging device to automatically capture images of the display content, and a processor to analyze these images and determine user-display distance without manual intervention. The focal length of the lens is automatically adjusted based on the analyzed image data, enabling the system to serve itself rather than requiring user operation.
Solution Approach 2:
The patent replaces manual mechanical adjustment mechanisms with an optical imaging system and computational processing. Instead of using physical distance meters or gyroscopes that require manual operation, the system uses image capture and digital analysis to determine distance and control focal length automatically.
2Measurement precision
If external devices like infrared distance meters are used to measure user-display distance, then measurement precision is improved, but device complexity increases due to additional components
Solution Approach 1:
The imaging device serves multiple functions: it captures the display content for virtual reality rendering and simultaneously measures the user-display distance by analyzing the captured image. This eliminates the need for separate distance measurement devices like infrared distance meters or gyroscopes, reducing device complexity while maintaining measurement precision.
Solution Approach 2:
The patent combines the display rendering function and the distance measurement function into a single imaging device. The same lens and image sensor used for capturing virtual reality content are also used to measure user-display distance, merging multiple functions into one component system.
3Adaptability or versatility
If sophisticated databases are used to adjust best distance of distinct vision, then adaptability is improved, but loss of time increases due to manual adjustment requirements
Solution Approach 1:
The system establishes a feedback loop where the imaging device continuously captures images of the display content, the processor analyzes these images to determine current user-display distance, and the lens focal length is automatically adjusted based on this analysis. This real-time feedback mechanism eliminates manual adjustment time while adapting to changing user positions.
Solution Approach 2:
The system performs preliminary image capture and analysis to determine the optimal focal length before the user needs to view the content. By continuously monitoring and pre-adjusting the focal length based on captured images, the system eliminates the time loss associated with manual adjustment when the user needs to view content.
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 solution enables automatic focal length adjustments, enhancing user immersion and independence from external devices, improving the overall virtual reality experience by ensuring clear visual images are displayed.
Implementation Method 1
the elastic micro lens array and the flexible substrate are arranged between the first electrode and the second electrode, and wherein the virtual reality device further comprises a processor configured to adjust the focal lengths of the lenses in the elastic micro lens array by controlling voltages applied to the first electrode and the second electrode
Implementation Method 2
an elastic micro lens array, the elastic micro lens array being arranged at a light incident side of the imaging portion and configured to modulate an incident light
Implementation Method 3
the imaging portion being configured to receive the incident light modulated by the elastic micro lens array and to convert intensity of the incident light into an electrical imaging signal
Data Source
AI summary
A virtual reality device, a method for adjusting focal lengths automatically, a method for producing the virtual reality device and a computer readable medium are provided. The virtual reality device includes: at least one imaging device comprising an imaging portion and an elastic micro lens array, the elastic micro lens array being arranged at a light incident side of the imaging portion and configured to modulate an incident light, the imaging portion being configured to receive the incident light modulated by the elastic micro lens array and to convert intensity of the incident light into an electrical imaging signal; and a display device configured to generate a visual image from the electrical imaging signal outputted by the imaging portion, wherein the elastic micro lens array has lenses which have independently adjustable focal lengths.