Color Emitter Composition for High-Contrast Reflective Surfaces

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Solution Overview

Problem

Current technologies face challenges in enhancing visible light emission from surfaces while minimizing broadband light emission or reflection, which can detract from image contrast in display applications.

Innovation Solution

The use of a mixture of color emitters configured to emit visible light at specific wavelengths in response to energy absorption, enhancing light intensity at target colors relative to reflected white light without additional emission from first and second color emitters, integrated into paints, inks, and display systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If broadband light sources are used to illuminate displays, then sufficient light intensity is provided, but image contrast deteriorates due to reflected white light overwhelming target color emission

Engineering Contradiction:

Improvelight intensityVSAvoidcolor purity

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The patent applies color changes by incorporating color emitters that convert broadband light into specific visible wavelengths. These emitters absorb energy across broad spectral ranges and re-emit light at target colors (red, green, blue, yellow, cyan, magenta), transforming the color composition of reflected light to enhance color purity and contrast while maintaining sufficient illumination intensity.

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The patent utilizes parameter changes by modifying the spectral characteristics of reflected light through up-conversion and down-conversion processes. By changing the wavelength parameters of reflected broadband light into specific visible bands, the system achieves enhanced color saturation and contrast without sacrificing overall light intensity, effectively resolving the contradiction between illumination and color purity.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If conventional reflective displays are used, then simple structure is maintained, but color saturation and contrast are insufficient under varying lighting conditions

Engineering Contradiction:

Improvedisplay structureVSAvoidcolor saturation

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent employs composite materials by combining conventional reflective display surfaces with color emitter materials. This composite structure integrates the simplicity of traditional displays with the color-enhancing properties of up-conversion and down-conversion materials, achieving improved color saturation and contrast while maintaining relative structural simplicity and avoiding complex additional components.

Inventive Principle:

Principle #40Composite materials

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 approach enhances visible light emission at target colors, improving image contrast and brightness by converting energy into specific wavelengths, thereby reducing unwanted broadband light emission or reflection.

Implementation Method 1

up converters configured to emit, upon exposure to an energy source, visible light at a first wavelength λ1 by conversion of a part of the energy into the visible light at the first wavelength λ1

Methodology Applied

Scientific EffectUp-conversion: Fluorescence

Implementation Method 2

down converters configured to emit, upon exposure to an energy source, visible light at a second wavelength λ2 by conversion of a part of the energy into the visible light at the second wavelength λ2

Methodology Applied

Scientific EffectDown-conversion: Phosphorescence

Implementation Method 3

first color emitters configured to emit, upon exposure to an energy source, visible light at a target color in response to absorption of energy across a first band of wavelengths

Methodology Applied

Scientific EffectAbsorption: Absorption (EM radiation)

Data Source

PatentUS11938011B2Color enhancement utilizing up converters and/or down converters

Publication Date: 2024.03.26 IMMUNOLIGHT LLC

AI summary

A light emitting composition including first color emitters and second color emitters. The first color emitters are configured to emit, upon exposure to an energy source, visible light at a target color in response to absorption of energy across a first band of wavelengths. The second color emitters are configured to emit, upon exposure to the energy source, visible light at the target color in response to absorption of energy across a second band of wavelengths. The light intensity observable at the target color is enhanced relative to reflected white light without emission from the first and second color emitters. The light emitting composition can be a part of a paint, an ink, a fabric, a thread, a road sign, a highway marking, an automobile, a boat, a plane, a reflector, a building product, a concrete product, an epoxy product, a jewelry product, colored contact lens, a candle product, a rubber product, a plastic product, or other colored surface.