Adjustable Detection Light Radiator for Projector Positioning
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Solution Overview
Problem
Existing interactive projectors face challenges in detecting pointing elements due to varying distances between detection light radiators and the projection area, leading to low contrast areas that hinder accurate detection of the pointing element's position.
Innovation Solution
A projector system with multiple detection light radiators, where at least one radiator's distance to another is changeable, and a reflection mirror with a concave surface to homogenize light flux density, ensuring complementary low contrast areas and improved detection light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple detection light radiators are disposed in different positions, then the detection light can be radiated to cover larger projection areas, but low contrast areas are created where the pointing element cannot be detected
Solution Approach 1:
The detection light radiator is configured to be movable relative to the projection area, allowing the distance between the radiator and projection area to be changed. This dynamic adjustment enables optimization of detection light distribution to eliminate low contrast areas while maintaining comprehensive coverage of the projection area.
Solution Approach 2:
The distance parameter between the detection light radiator and the projection area is made changeable. By adjusting this parameter, the system can optimize the detection light intensity distribution across the projection area, ensuring sufficient contrast for pointing element detection throughout the entire area.
2Area of stationary object
If the distance from detection light radiator to projection area is increased, then larger projection areas can be covered, but the detection light intensity decreases creating low contrast areas
Solution Approach 1:
The system employs dynamic adjustment of the detection light radiator's position, allowing the distance to be optimized based on the required projection area size. This enables maintaining adequate detection light intensity across varying projection areas by adjusting the radiator's distance accordingly.
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 configuration allows for reliable detection of the pointing element's position across varying projection area sizes, enhancing the projector's reliability by maintaining consistent detection performance.
Implementation Method 1
a reflection mirror with a concave surface to homogenize light flux density
Data Source
AI summary
A projector including an exterior enclosure, a light source apparatus, a light modulator, a projection optical apparatus, a plurality of detection light radiators that radiate detection light used to detect a pointing element onto a projection area, an imager that receives light that belongs to a wavelength region including the wavelength of the detection light to capture an image of the projection area, and a position detector that detects the position of the pointing element in the projection area based on the image captured by the imager, wherein the plurality of detection light radiators are arranged in different positions on the exterior enclosure, the plurality of detection light radiators include a first detection light radiator, and the first detection light radiator is so configured that a distance therefrom to another detection light radiator out of the plurality of detection light radiators is changeable.