Virtual Segmentation in Scanning Laser Projector Displays
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Solution Overview
Problem
Current interactive projection systems require a separate camera for user interaction, which increases complexity and costs, and struggle with accurately segmenting user input within a projected image without real-time processing.
Innovation Solution
The implementation of virtual segmentation circuits within a scanning laser projector that use a photodetector and gating mechanism to recognize and gate reflections in real-time based on predefined regions, eliminating the need for a separate imaging apparatus and enabling accurate interaction within specific areas of the projected image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate camera is used for user interaction detection, then interaction capability is achieved, but device complexity and cost increase
Solution Approach 1:
The patent merges the interaction detection function into the existing projector system by integrating a photodetector and gating mechanism with the laser scanning components. The projector now simultaneously performs image projection and interaction detection without requiring a separate camera system, thus reducing device complexity while maintaining interaction capability
Solution Approach 2:
The projector system is designed to perform multiple functions: image projection using the laser scanner and simultaneous user interaction detection using the photodetector and gating mechanism. This multi-functional design eliminates the need for dedicated separate components for each function, reducing overall system complexity
2Measurement precision
If real-time processing is implemented for interaction detection, then interaction accuracy improves, but processing speed requirements increase
Solution Approach 1:
The gating mechanism is pre-configured with region-of-interest data before interaction detection begins. This preliminary setup allows the system to immediately filter and process only relevant reflections from predefined areas, enabling real-time accurate detection without requiring complex post-processing or high-speed general-purpose computation
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 allows for robust, real-time user interaction within defined regions of a projected image without a camera, simplifying the system and enhancing interaction accuracy, while maintaining system efficiency and reducing costs.
Implementation Method 1
detecting reflections of the modulated laser light
Implementation Method 2
a photodetector and gating mechanism to recognize and gate reflections
Implementation Method 3
modulated laser light is projected in a raster pattern
Implementation Method 4
modulated laser light is projected in a raster pattern within a field of view to display an image
Data Source
AI summary
Regions are defined in projected content to create a virtually segmented display. When reflections are received from objects within a defined region, the reflections are recognized and passed to a user interface circuit. When reflections are received from objects outside a defined region, the reflections are gated and not recognized.