Adjustable Optical Device for Virtual Image Distance Control
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Solution Overview
Problem
Current display apparatuses for eye protection often force users to maintain a certain distance, dim the screen, or prevent patterns when too close, resulting in a poor user experience.
Innovation Solution
A display apparatus with an adjustable optical device that detects the user's distance and adjusts the virtual image's position to maintain a reasonable viewing distance, using micro lens groups to adjust focal length and ensure eye protection without compromising user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the display apparatus forces users to maintain a certain distance or dim the screen when too close, then eyesight protection is improved, but user experience deteriorates
Solution Approach 1:
The patent introduces a virtual image as an intermediary between the user's eyes and the physical display screen. By forming a virtual image at a distance greater than twice the diagonal of the screen through optical components (convex lens, concave lens, or reflective mirror), the system allows users to view content from closer distances while the virtual image remains at a safe viewing distance, thus protecting eyesight without forcing users to maintain physical distance from the device
Solution Approach 2:
The system dynamically changes optical parameters (focal length, image distance) based on the detected distance between the user and the display screen. When the user approaches too closely, the optical components adjust to form the virtual image at an appropriate distance, transforming the viewing geometry to protect eyesight while maintaining comfortable viewing conditions
2Object-affected harmful factors
If the display apparatus prevents patterns or dims the screen when users are too close, then eyesight protection is improved, but viewing quality deteriorates
Solution Approach 1:
The virtual image serves as an intermediary that decouples the physical screen position from the effective viewing distance. Users can view the content at close physical distances without the screen needing to dim or prevent patterns, as the virtual image formation naturally provides eyesight protection while maintaining full viewing quality
3Object-affected harmful factors
If the display apparatus requires users to manually adjust their position, then eyesight protection is improved, but ease of operation deteriorates
Solution Approach 1:
The system performs self-service by automatically detecting the user's distance from the screen and dynamically adjusting the virtual image distance through optical components. This eliminates the need for users to manually adjust their position, as the system autonomously maintains appropriate viewing distances for eyesight protection while keeping the interface simple and user-friendly
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 effectively protects eyesight by automatically adjusting the viewing distance to a safe range, enhancing the user experience by allowing comfortable viewing without the need for users to manually adjust their position.
Implementation Method 1
the adjustable optical device is configured to adjust a distance between the display screen and a virtual image of the image formed by the adjustable optical device
Data Source
AI summary
A display apparatus and a display method are provided. The display apparatus includes: a display device and an adjustable optical device, the display device includes a display screen, configured to display an image; the adjustable optical device is located at a side of the display screen which is used to display, the adjustable optical device is configured to adjust a distance between the display screen and a virtual image of the image formed by the adjustable optical device.