Floating Real Image Display with Depth-Adaptive Light Cone
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Solution Overview
Problem
Conventional stereoscopic displays are limited by software and hardware restrictions, causing user discomfort due to crosstalk and germ contamination issues, and lack the ability to provide a comfortable and realistic interactive experience with floating images.
Innovation Solution
A display apparatus that generates a floating real image using an image generator, projection lens set, and depth detecting module, allowing the image to be adjusted in position and size based on user position, with a light-cone angle that satisfies a specific formula to provide a large viewing angle and realistic interactive experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stereoscopic displays are used, then stereoscopic image display is achieved, but user discomfort occurs due to crosstalk
Solution Approach 1:
The patent introduces a light field display system as an intermediary between the display device and the user's eyes. This system uses a light field generator to create multiple view rays that converge at specific depth positions, allowing the user to view stereoscopic images without crosstalk by properly directing light to each eye based on viewing angle.
Solution Approach 2:
The patent changes the fundamental parameters of light propagation by controlling the light field distribution. It adjusts the convergence points and viewing angles of light rays dynamically, creating a volumetric light field that maintains proper stereoscopic separation without the crosstalk issues of conventional planar displays.
2Ease of operation
If touch control panels are used, then user interaction is enabled, but germ contamination increases due to frequent touching
Solution Approach 1:
The patent introduces a virtual interface in the air as an intermediary between the user and the display system. Users can interact with floating virtual buttons and controls in three-dimensional space without physical contact, enabling touchless operation that prevents germ contamination while maintaining ease of use.
Solution Approach 2:
The patent transitions the user interface from a two-dimensional planar surface to a three-dimensional volumetric space. By projecting interactive elements into the air at various depth positions, users can interact with the interface using hand gestures or eye tracking, eliminating the need to touch physical surfaces.
3Device complexity
If fixed distance stereoscopic display is used, then simple hardware is required, but adaptability to different user positions is poor
Solution Approach 1:
The patent implements dynamic adjustment of the light field parameters based on user position. The system continuously tracks the user's location and adjusts the convergence points and viewing angles of the light rays in real-time, allowing the stereoscopic display to adapt to different viewing positions while maintaining image quality.
Solution Approach 2:
The patent incorporates feedback mechanisms that detect user position and viewing angle, then use this information to adjust the light field generation parameters. This closed-loop control enables the system to maintain optimal stereoscopic display performance across varying user positions without requiring complex fixed-position hardware.
4Ease of operation
If floating real image is generated with large viewing angle, then realistic interactive experience is improved, but light-cone angle control complexity increases
Solution Approach 1:
The patent divides the light field into multiple discrete view rays or angular segments. By controlling light distribution in discrete angular intervals rather than continuously, the system achieves large viewing angles with manageable complexity. Each segment corresponds to a specific viewing direction, simplifying the control architecture.
Solution Approach 2:
The patent implements sufficient light cone angle coverage to achieve the desired viewing angle without over-engineering the system. By providing slightly more angular coverage than the absolute minimum required, the system achieves robust large-angle viewing performance while keeping the control mechanism relatively simple.
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 display apparatus provides a comfortable and realistic interactive experience by generating a floating real image that can be viewed at a large angle and adjusted according to user position, reducing crosstalk and germ contamination risks.
Implementation Method 1
The projection lens set is located between the image generator and the user, and the image projected by the projection lens set generates a floating real image between the projection lens set and the user
Data Source
AI summary
A display apparatus including an image generator, a projection lens set, a depth detecting module detecting the position of user, and a control unit is provided, wherein the control unit is electrically connected to the image generator, the projection lens set and the depth detecting module. An image displayed by the image generator is projected through the projection lens set and generates a floating real image between the projection lens set and the user. Each beam forming the floating real image has a light-cone angle θ. The image generator and the projection lens adjust the position of the floating real image according to the position of user. The size of the floating real image is L, the distance between two eyes of the user is W, the distance between the user and the floating real image is D, and the light-cone angle θ satisfies the formula ofθ≥tan-1(L+WD).