Laser Projection System for Dynamic Pavement Advertising
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Solution Overview
Problem
Current laser projectors lack the ability to effectively project advertisements on surfaces with low optical absorbance, such as building walls or pavement, without the use of a reflective screen, as they fail to adapt to moving targets and their actions in real-time.
Innovation Solution
A system comprising a controller with a processor and non-volatile memory, a camera, and a laser projector that captures image frames, detects targets, and generates projecting parameters including polar and azimuth angles to project patterns at predetermined distances from moving targets, ensuring effective pavement advertising.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If laser projectors project images directly on surfaces with low optical absorbance without reflective screens, then the device complexity is reduced, but the visibility and effectiveness of the projected advertisement deteriorates
Solution Approach 1:
The patent implements dynamic projection by tracking moving targets (pedestrians) and adjusting projection parameters in real-time. The system captures image frames, detects target positions and movements, and dynamically updates projection angles and positions to maintain optimal visibility on low-absorbance surfaces without requiring additional reflective screens.
2Device complexity
If laser projectors use fixed projection parameters, then the device complexity is reduced, but the ability to adapt to moving targets deteriorates
Solution Approach 1:
The system employs feedback mechanisms by continuously capturing image frames of the projection area, detecting target positions and movements, and using this information to adjust projection parameters. The controller receives detection results and dynamically modifies projection angles, positions, and timing to track moving pedestrians effectively.
Solution Approach 2:
The patent transforms the static projection system into a dynamic one by implementing real-time target detection and tracking. The system adapts projection parameters based on detected target movements, enabling the laser projector to follow pedestrians and maintain engagement without requiring complex manual adjustments.
3Adaptability or versatility
If laser projectors implement real-time target detection and dynamic projection adjustment, then the adaptability to moving targets is improved, but the device complexity increases
Solution Approach 1:
The patent integrates multiple functions into a unified system: the controller simultaneously manages image frame capture, target detection, parameter calculation, and projection control. This multi-functional approach reduces the need for separate dedicated components for each function, thereby managing complexity while achieving real-time adaptability to moving targets.
4Manufacturing precision
If laser projectors project at fixed positions, then the manufacturing precision requirements are reduced, but the effectiveness of pavement advertising deteriorates
Solution Approach 1:
The system replaces fixed-position projection with dynamic position adjustment based on real-time target detection. The controller calculates optimal projection positions and angles by analyzing detected target locations and movements, allowing the laser projector to adapt its projection position dynamically without requiring high manufacturing precision for fixed installations.
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
Enables dynamic and targeted projection of advertisements on moving pedestrians by adjusting the projection based on target location, direction, and speed, ensuring clear visibility and engagement.
Implementation Method 1
when the target area has a surface with low optical absorbance
Implementation Method 2
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation
Data Source
AI summary
Certain aspects direct to a laser projection pavertizing system, which includes a camera, a laser projector, and a controller. The camera is configured to capture the image frames of the projection area. When the controller receives image frames from the camera, the controller processes the image frames to detect at least one target existing in the projection area, generates projecting parameters for each of the at least one target, and sends the projecting parameters to the laser projector. Upon receiving the projecting parameters, the laser projector projects a pattern for each of the at least one target on the projection area at a predetermined distance from the at least one target in accordance with the projecting parameters such that the pattern is viewable for the at least one target.