Projection Device Automatic Lens Correction
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Solution Overview
Problem
Manual adjustments of projector parameters, such as focal length and image content, are time-consuming and prone to human error when projector positions or numbers change, leading to inaccurate projections.
Innovation Solution
A projection device and method that automatically corrects lens parameters and adjusts image content using a controller, image generation optical path module, and image capturing device, projecting both visible and invisible light images to the same area to obtain reference images for real-time correction without disrupting normal projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment of projector parameters is performed, then projection parameters can be corrected, but the process is time-consuming and laborious
Solution Approach 1:
The system performs self-adjustment by automatically capturing the projected image, analyzing distortion, and correcting projection parameters without human intervention. The controller autonomously completes the entire adjustment process from image capture to parameter correction, making the system self-servicing.
Solution Approach 2:
The system captures the actual projected image through an image capturing device, compares it with the expected image, and uses this feedback to automatically adjust projection parameters. This closed-loop feedback mechanism enables real-time correction of projection distortion.
2Manufacturing precision
If manual trapezoidal correction and focal length adjustment are performed, then clear projection can be achieved, but the process is complex and error-prone
Solution Approach 1:
The system replaces manual mechanical adjustment operations with automated electronic control. The controller electronically adjusts projection parameters based on image analysis, substituting the need for manual mechanical manipulation of projection components.
Solution Approach 2:
The system autonomously performs image capture, analysis, and parameter correction without requiring user intervention. The entire process from detecting projection distortion to correcting it is handled automatically by the system itself.
3Area of stationary object
If multiple projectors are used for large image projection, then coverage area increases, but manual splicing adjustment becomes more time-consuming
Solution Approach 1:
The system captures the composite image from multiple projectors, analyzes the splicing alignment, and provides feedback for automatic adjustment of each projector's parameters to achieve precise multi-projector integration.
Solution Approach 2:
The system handles both single-projector and multi-projector scenarios with the same automated adjustment mechanism, making the solution universally applicable regardless of the number of projectors used.
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 improves projection quality and user experience by enabling automatic adjustments of lens parameters and image content, reducing the need for manual intervention and minimizing errors.
Implementation Method 1
The image generation optical path module is configured to generate a visible light image and an invisible light image according to a control signal, and project the visible light image and the invisible light image to a projection area through the projection lens
Implementation Method 2
The image capturing device is configured to photograph the projection area to obtain an invisible light reference image
Data Source
AI summary
A projection device and a projection method are provided. The projection device includes a projection lens, an image generation optical path module, an image capturing device and a controller. The image generation optical path module generates a visible light image and an invisible light image according to a control signal, and projects the visible light image and the invisible light image to a projection area through the projection lens. The image capturing device photographs the projection area to obtain an invisible light reference image. The controller is coupled to the projection lens, the image generation optical path module and the image capturing device, and corrects at least one of the projection lens and the control signal according to the invisible light reference image and the invisible light image.