Denise R Wilson

US Patent:

7583381, Sep 1, 2009

Filed:

Apr 22, 2008

Appl. No.:

12/107718

Inventors:

Denise M. Wilson - Lynnwood WA, US
Andrew E. Moe - Shoreline WA, US

Assignee:

University of Washington - Seattle WA

International Classification:

G01N 21/25

US Classification:

356417

Abstract:

According to embodiments of the present invention, a fluorescence analysis system includes a light emitting diode to excite a fluorophor sample for analysis. The system includes an LED driver that pulses the LEDs in the array with currents in excess of maximum rated current at low duty cycles. One embodiment receives a first drive current at a light emitting diode (LED), emits excitation light having a first color and/or first wavelength band in response to the first drive current, receives a second drive current at the LED, and emits excitation light having a second color and/or second wavelength band in response to the second drive current, wherein at least one of the drive currents is greater than a nominal drive current for the LED.

US Patent:

20060082768, Apr 20, 2006

Filed:

Aug 31, 2005

Appl. No.:

11/217567

Inventors:

Denise Wilson - Lynnwood WA, US
Andrew Moe - Shoreline WA, US

International Classification:

G01J 3/30

US Classification:

356317000, 356318000

Abstract:

According to embodiments of the present invention, a fluorescence analysis system includes a light emitting diode (LED) array to excite a fluorophor sample for analysis. The system includes an LED array driver that pulses the LEDs in the array with currents in excess of maximum rated current at low duty cycles to reduce LED degradation over time. An LED selection optimization process and software select the LEDs to be included in the array from among various colors and currents to be applied. The LED selection optimization process and software take filters and attenuation into consideration.