LED-spectrum shaping by optical filter achieves CRI exceeding 97
Jun 17, 2009
By using thin film optical filter over six LEDs—warm white, deep red, green, blue, royal blue, and UV researches from National Central University (Taiwan) achieved CRI easily exceeding 97.
Modulating the driving current of each LED combined with the optical filter composed of layers of titanium dioxide (TiO2) and silicon dioxide (SiO2), successfully achieved CCTs that ranged from 4000 to 10,000K, which covers the needs of most practical applications.
Source: SPIE 
Recent News
02/25/2010
Philips OLED Mirror Wall Priced at $15K/sq. meter (Video)
02/10/2010
Last Call for IESNA Illumination Awards Applicants 2010
02/07/2010
BetaLED launches 100 lm/W luminaire
01/20/2010
e:cue's Light-Drive Elite Wins the iF Product Design Award 2010
01/12/2010
2009 Prism Awards finalists
01/11/2010
SchahlLED Becomes an Official Distributor of Ledon
01/06/2010
Lighting Facts Label
01/06/2010
Neopac Epoch VIII LED high bay down light
01/06/2010
10W LED Wallpack will replace 35W HPS
01/06/2010
Fun Electronics will manufacture Residential LED Lighting Systems under the Emerson Brand
01/06/2010
AE Light Introduces Mark 11 LED Tactical Flashlight
01/06/2010
Fairchild Semiconductor and Infineon Reach Patent Settlement and Enter into Cross-License
01/06/2010
Sharp and Toyoda Gosei Enter into LED and Laser Diode Patent Cross-Licensing Agreement
01/03/2010
Sharp announced nine new LEDs with high color rendering
12/09/2009
Cree XLamp XP-E LEDs optimized for outdoor applications
12/09/2009
LedEngin launches PAR38 LED lapmp
12/08/2009
LEDs provide energy-saving period-style lighting for historical alleys in Regensburg
12/08/2009
HUGA boosts BLU LED capacity with six more AIXTRON MOCVD tools
12/07/2009
DOE Publishes Final Energy Star Criteria for LED Lighting
12/07/2009
Intematix applies phosphor and LED module expertise to launch next-generation of retail signage