Gesture-Controlled Rear-Projection System for Interactive Displays
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Solution Overview
Problem
Existing interactive retail systems face challenges such as high costs, safety risks, unhygienic conditions, limited display size, and space constraints due to the use of touch screens and single projector rear-projection systems, which hinder effective information presentation and interaction in scenarios like shopping windows and trade show booths.
Innovation Solution
A gesture-controlled rear-projection system utilizing two or more conventional video projectors projecting onto a transparent surface with an image processing module for composite image creation, allowing users to interact without touching the surface, and enabling larger, life-size projections in limited spaces by minimizing the distance between projectors and the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If touch screens, LCD screens or TV sets are used to present information, then interaction capability is improved, but system cost increases and safety risks arise
Solution Approach 1:
The patent replaces physical touch screens, LCD screens, and TV sets with a projection-based system that uses light to create interactive displays on transparent surfaces. This substitution eliminates the need for expensive electronic display hardware while maintaining interaction capabilities through gesture recognition and projection mapping, directly addressing the cost and complexity issues.
Solution Approach 2:
The system creates virtual copies of interactive display functionality through projection onto transparent surfaces. Instead of using physical screens, the patent projects images and interfaces that can be interacted with, providing a cost-effective alternative that replicates the essential interaction capabilities of traditional displays without the associated hardware costs and safety risks.
2Ease of operation
If touch screens, LCD screens or TV sets are used to present information, then interaction capability is improved, but hygiene conditions deteriorate
Solution Approach 1:
The patent replaces physical touch surfaces with projection-based interaction on transparent surfaces. Users interact with the projected images through gestures in the air rather than touching the display surface, eliminating the germ pool problem associated with shared touch screens while maintaining full interaction capability.
3Ease of operation
If touch screens, LCD screens or TV sets are used to present information, then interaction capability is improved, but display size is limited
Solution Approach 1:
The patent transitions from fixed-size electronic screens to projection-based displays that can be scaled to much larger dimensions. By projecting onto transparent surfaces such as windows or walls, the system achieves life-size or larger display areas while maintaining interaction capabilities through gesture control, effectively adding dimensional flexibility to the display size.
4Device complexity
If a single projector is used in rear-projection system, then device complexity is reduced, but projection area size is limited and distance requirements increase
Solution Approach 1:
The patent combines multiple projectors to work together in a rear-projection system, merging their projection areas to create a larger composite display. This approach overcomes the size limitations of single projectors while maintaining manageable device complexity through coordinated operation of multiple units.
Solution Approach 2:
The patent divides the large projection area into multiple segments, each projected by a separate projector. This segmentation allows the system to achieve large overall projection areas by combining multiple smaller projection units, addressing the limitation of single projector size while keeping individual components manageable.
5Illumination intensity
If a powerful projector is used to provide sufficiently bright image, then illumination intensity is improved, but system cost increases
Solution Approach 1:
The patent combines multiple standard projectors to achieve the illumination intensity and brightness of a single powerful projector. By merging the light output of multiple units and projecting onto a transparent surface, the system achieves sufficient brightness for the application while using more affordable, less powerful individual projectors, thereby reducing overall system cost.
Data Source
AI summary
The present invention concerns an interactive rear-projection system (1), comprising, at least two projection means, each adapted for projecting a part of an image onto a rear-projection foil attached to a transparent surface (2); an image processing module for the seamless composition of each projected image into a composite image; and gesture control means (4) for enabling a user (3) to interact with the composite image using one or more gestures.