Light emitting diode driver providing current and power control

Details Light emitting diode driver providing current and power control Light emitting diode driver providing current and power control

2011-05-17

2011-05-17

Patel, Nitin (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S098000

Reexamination Certificate

active

07944420

ABSTRACT:
As apparatus for controlling operating parameters for a light emitting diode (LED). A driver receives an input voltage from a voltage source and a control signal. The driver provides a driver output current to the LED based on the control signal. The LED has an LED voltage as a function of the driver output current and has an LED power as a function of said LED voltage and said driver output current. A controller determines the LED voltage and produces the control signal provided to the driver as a function of the LED voltage. The control signal corresponds to a constant driver output current when the LED voltage is less than a predetermined voltage value. The control signal corresponds to a varying driver output current for substantially maintaining the LED power at a constant predetermined power value web the LED voltage is greater than the predetermined voltage value.

REFERENCES:
patent: 6433488 (2002-08-01), Bu
patent: 7088319 (2006-08-01), Yoshida et al.
patent: 7236148 (2007-06-01), Yoshida et al.
patent: 7317403 (2008-01-01), Grootes et al.
patent: 7564434 (2009-07-01), Kim
patent: 7714515 (2010-05-01), Emek et al.
patent: 7777704 (2010-08-01), S et al.
patent: 7800558 (2010-09-01), Routley et al.
patent: 7808451 (2010-10-01), Rutherford
patent: 2004/0196225 (2004-10-01), Shimada
patent: 2006/0022214 (2006-02-01), Morgan et al.
patent: 2006/0109205 (2006-05-01), Deng
patent: 2007/0242003 (2007-10-01), Vogel et al.
patent: 2007/0247414 (2007-10-01), Roberts
patent: 2008/0012507 (2008-01-01), Nalbant
patent: 2008/0055196 (2008-03-01), Izumida
patent: 2008/0303804 (2008-12-01), Schmidt et al.
patent: 2009/0009504 (2009-01-01), Thiebaud et al.
Bowling, Buck-Boost LED Driver Using the PIC16F785 MCU, Jul. 21, 2006. Available at http://ww1.microchip.com/ downloads/en/AppNotes/10147a.pdf>.
Unknown, “Hysteretic Boost-Buck (Cuk) LED Driver IC,” available at http://www.supertex.com, 2007, 7 pages.
Unknown, “Designing a Boost-Buck (Cuk) Converter with the HV9930,” available at http://www.supertex.com, 2005, 23 pages.

Affiliated with

Also associated with

Rating

Light emitting diode driver providing current and power control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light emitting diode driver providing current and power control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light emitting diode driver providing current and power control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2653663