Lamp With Dichroic Filter for Multicolor LED Lighting
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Solution Overview
Problem
Conventional lamps are limited in generating multicolor light, as they either rely on monochromatic light emission after passing through a lampshade or using a color filter, which only produces single-colored light.
Innovation Solution
Incorporating a dichroic filter and a light emitting diode (LED) with a lampshade or projection screen, where the LED emits light that passes through or is refracted by the dichroic filter, creating multiple colors on the lampshade or projection screen by separating light into different frequency ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a color filter is used to generate colored light, then the light color is pure and consistent, but only monochromatic light can be generated
Solution Approach 1:
The patent segments the white light spectrum by using a dichroic filter to separate light into different frequency ranges (refracted and transmitted portions). This allows multiple colors to be generated simultaneously from a single LED source, resolving the contradiction between color variety and device complexity.
Solution Approach 2:
The patent changes the optical parameters of the light by using a dichroic filter that refracts and transmits different frequency ranges of light. This parameter-based separation enables multicolor light generation without requiring multiple color filters, thus improving adaptability while maintaining relatively simple device structure.
2Adaptability or versatility
If a lampshade is used for decoration, then the light color matches the lampshade color, but the color variety is limited to the lampshade's colors
Solution Approach 1:
The patent extracts the color generation function from the lampshade itself and relocates it to the light generation system through a dichroic filter. This allows the lampshade to remain simple while the light source generates multiple colors, resolving the contradiction between color variety and device complexity.
Solution Approach 2:
The dichroic filter acts as an intermediary between the LED light source and the lampshade, separating white light into multiple frequency ranges that produce different colors. This mediator enables multicolor light generation without complicating the lampshade structure.
3Adaptability or versatility
If conventional illumination methods are used, then the structure is simple, but the decorative capability is limited to single color
Solution Approach 1:
The patent makes the illumination system multi-functional by enabling a single LED combined with a dichroic filter to generate multiple colors simultaneously. This universal light generation approach enhances decorative capability without requiring separate light sources for each color, thus limiting the increase in device complexity.
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
Enables the generation of multiple colors on the lampshade or projection screen, enhancing decorative and illuminating capabilities beyond monochromatic light, with adjustable viewable angles for optimal color display.
Implementation Method 1
one portion of the light within a predetermined frequency range passes through the dichroic filter, and the other portion of the light outside the predetermined frequency range is refracted by the dichroic filter
Implementation Method 2
a light emitting diode (LED) emits light towards the dichroic filter
Data Source
AI summary
A lamp includes a dichroic filter, a light emitting diode, and a lampshade. The light emitting diode emits light towards the dichroic filter. One portion of the light within a predetermined frequency range passes through the dichroic filter. The other portion of the light is refracted by the dichroic filter. The lampshade is used for shading the light. Therefore, the lampshade shows two colors of light.