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Proceedings Paper

Newly patented process enables low-cost solution for increasing white light spectrum of LEDs
Author(s): Jan-Marie Spanard
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Paper Abstract

A newly patented process for completing the spectral light array emitted by LED bulbs provides a low-cost method for producing better human centered lighting (HCL). This process uses non-luminescent colorant filters, filling out the jagged LED spectral emission into a full, white light array. While LED bulbs have the distinct economic advantages of using less energy, producing less heat and lasting years longer than traditional incandescent bulbs, the persistent metameric failure of LED bulbs has resulted in slower, and sometimes reluctant, adoption of LED lighting by the residential, retail and architectural markets. Adding missing wavelengths to LED generated bulbs via colorant filters increases the aesthetic appeal of the light by decreasing current levels of metameric failure, reducing the ‘flatness’, ‘harshness’, and ‘dullness’ of LED generated light reported by consumers. LED phosphor-converted light can be successfully tuned to "whiter" white light with selective color filtering using permanent, durable transparent pigments. These transparent pigments are selectively applied in combination with existing manufacturing technologies and utilized as a final color-tuning step in bulb design. The quantity of emitted light chosen for color filtering can be adjusted from 1% to 100% of emitted light, creating a custom balance of light quantity with light quality. This invention recognizes that “better light” is frequently chosen over “more light” in the consumer marketplace.

Paper Details

Date Published: 16 October 2017
PDF: 12 pages
Proc. SPIE 10448, Optifab 2017, 1044828 (16 October 2017); doi: 10.1117/12.2279773
Show Author Affiliations
Jan-Marie Spanard, Light Spectrum Glazes (United States)

Published in SPIE Proceedings Vol. 10448:
Optifab 2017
Julie L. Bentley; Sebastian Stoebenau, Editor(s)

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