Fluorescent Paint for Star Field Projection
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Solution Overview
Problem
Traditional paints and methods for creating black backgrounds for star fields are either too reflective, making the background visible, or require labor-intensive and costly setups, and existing fluorescent paints have time-consuming two-step application processes.
Innovation Solution
A paint composition with a carrier material, ambient light absorbing pigment particles, and fluorescent pigment particles that appear black under ambient light but emit white light under UV illumination, providing a high screen gain for directional light projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional fluorescent paints are used to create a black background, then the background can appear black under ambient light, but the application process requires two separate coats which is time-consuming
Solution Approach 1:
The patent combines the black background pigment and fluorescent pigment into a single paint composition that can be applied in one coat. The composition contains both carbon black particles for ambient light absorption and fluorescent particles that emit under UV illumination, eliminating the need for separate base coat and fluorescent top coat applications.
2Illumination intensity
If non-black backgrounds are used to enhance brightness, then screen gain is improved, but the background becomes perceptible which destroys the star field illusion
Solution Approach 1:
The patent uses fluorescent particles that change their optical properties based on illumination wavelength. Under ambient visible light, the particles appear black and absorb light. Under UV illumination from the projector, the particles fluoresce and emit visible light, providing high screen gain. This parameter change allows the background to be imperceptible during normal viewing while providing bright projection during UV illumination.
3Illumination intensity
If LED screens or fiber optic cables are used to create star fields, then bright clear projections are achieved, but the cost and labor intensity increase significantly
Solution Approach 1:
The patent employs fluorescent pigments that absorb UV light and emit visible light at different wavelengths. This photoluminescence effect allows standard projectors to produce bright, clear star field projections when equipped with UV illumination, replacing expensive LED screens and fiber optic installations with a simple paint coating application.
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
The paint composition allows for a matte black appearance under ambient light and high contrast white projection under UV light, enabling a cost-effective and efficient method to project bright, clear star fields on a black background without visible background interference.
Implementation Method 1
a plurality of fluorescent pigment particles dispersed throughout the carrier material, wherein the fluorescent pigment particles emit a first color and the paint composition emits a second color different from the first color when illuminated by an ultraviolet light source
Implementation Method 2
a plurality of ambient light absorbing pigment particles dispersed in the carrier material comprising a component that absorbs predetermined visible wavelengths
Data Source
AI summary
A paint composition comprises a carrier material, a plurality of ambient light absorbing pigment particles dispersed in the carrier material comprising a component that absorbs predetermined visible wavelengths, and a plurality of fluorescent pigment particles dispersed in the carrier material, wherein the fluorescent pigment particles emit a first color and the paint composition emits a second color different from the first color when illuminated by an ultraviolet light source. The paint composition can act as a video projection surface with usable screen gain.