Newly patented process enables low-cost solution for increasing white light spectrum of LEDs

Jan-Marie Spanard

doi:10.1117/12.2279773

16 October 2017 Newly patented process enables low-cost solution for increasing white light spectrum of LEDs

Jan-Marie Spanard

Proceedings Volume 10448, Optifab 2017; 1044828 (2017) https://doi.org/10.1117/12.2279773
Event: SPIE Optifab, 2017, Rochester, New York, United States

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.

Citation Download Citation

Jan-Marie Spanard "Newly patented process enables low-cost solution for increasing white light spectrum of LEDs", Proc. SPIE 10448, Optifab 2017, 1044828 (16 October 2017); https://doi.org/10.1117/12.2279773

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