Projector Detection Light Direction Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projectors that detect operation of pointing elements using detection light often falsely detect operations due to an unsuitable radiation direction of detection light, leading to inaccurate detection and projection issues.
Innovation Solution
A projector system that includes a projection section, a detection light radiation section, and a controller, where the detection light is adjusted based on the detection of reflected light to ensure accurate alignment and projection range, allowing for real-time adjustment of the detection light direction and image projection range to prevent false detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the detection light is radiated in a fixed direction, then the device structure is simple, but false detection occurs when the radiation direction does not align with the projection surface
Solution Approach 1:
The patent applies the dynamics principle by making the detection light radiation direction adjustable rather than fixed. The adjuster dynamically changes the radiation direction to align with the projection surface, resolving the contradiction between simple structure and reliable detection. This allows the system to adapt to different projection surface orientations while maintaining structural simplicity through a single adjustable component.
Solution Approach 2:
The patent applies parameter changes by modifying the radiation direction parameter of the detection light. The controller adjusts the radiation direction based on the projection surface orientation, transforming the fixed parameter into a variable one. This resolves the contradiction by allowing the system to maintain simple structure while achieving reliable detection through parameter optimization.
2Measurement precision
If the detection light radiation direction is adjusted to align with the projection surface, then detection accuracy is improved, but the device structure becomes more complex
Solution Approach 1:
The adjuster provides dynamic adjustment capability with minimal structural addition. By implementing a single adjustable mechanism rather than multiple complex components, the patent achieves improved detection accuracy while keeping the overall device structure relatively simple.
Solution Approach 2:
The controller automatically controls the adjuster to align the detection light with the projection surface without requiring manual intervention. This self-service capability improves detection accuracy while avoiding the complexity of manual adjustment mechanisms.
3Measurement precision
If the projection range is adjusted to resolve false detection, then detection accuracy is improved, but the image projection quality may deteriorate
Solution Approach 1:
The controller first adjusts the detection light radiation direction using the adjuster before modifying the projection range. This preliminary action resolves false detection at its source, preventing the need for compensatory projection range adjustments that would degrade image quality. The hierarchy of adjustments prioritizes detection alignment over projection parameters.
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 effectively reduces false detection of pointing element operations by ensuring the detection light is correctly aligned with the projection surface, enhancing the accuracy and reliability of touch operation detection and image projection.
Implementation Method 1
a detection light radiation section that radiates detection light in a direction corresponding to the projection surface
Implementation Method 2
a detector that detects reflected light resulting from the detection light to detect operation performed on the projection surface
Data Source
AI summary
A projector can include a projection section that projects an image on a projection surface, a detection light radiation section that radiates detection light in a direction corresponding to the projection surface. The projector can also include an adjuster that adjusts the direction of the detection light relative to the projection surface, and an imager and a controller that can detect reflected light resulting from the detection light to detect operation performed on the projection surface. The controller can evaluate whether or not the detection state of the reflected light corresponds to a specific state. If the detection is in the specific state, the adjuster can adjust the direction of the detection light based on a result of the evaluation.