Electric lamp and discharge devices: systems – Current and/or voltage regulation
Reexamination Certificate
2007-10-30
2007-10-30
Philogene, Haissa (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
C315S224000, C315S309000, C315SDIG002, C345S690000, C323S905000
Reexamination Certificate
active
11695023
ABSTRACT:
A method and system allow a lighting device having light sources with multiple color temperatures to vary a color temperature of the lighting device in response to changing dimming levels. The light sources are non-incandescent light sources, such as light emitting diodes and/or gas-discharge lights. A dimmer circuit provides a dimming signal that indicates a selected dimming level. The lighting device includes a light source driver and a light source driver controller that cooperate to vary drive currents to the light sources in response to the selected dimming level. By varying the drive currents in different relative amounts, the color temperature of the lighting device changes in response to dimming level changes. In at least one embodiment, changes in the color temperature of the lighting device in response to the dimming level changes simulates the color temperature changes of an incandescent light source.
REFERENCES:
patent: 4414493 (1983-11-01), Henrich
patent: 4677366 (1987-06-01), Wilkinson et al.
patent: 4940929 (1990-07-01), Williams
patent: 6083276 (2000-07-01), Davidson et al.
patent: 6211627 (2001-04-01), Callahan
patent: 6246183 (2001-06-01), Buonavita
patent: 6509913 (2003-01-01), Martin, Jr. et al.
patent: 6583550 (2003-06-01), Iwasa et al.
patent: 6636003 (2003-10-01), Rahm et al.
patent: 6713974 (2004-03-01), Patchornik et al.
patent: 6781351 (2004-08-01), Mednik et al.
patent: 6806659 (2004-10-01), Mueller et al.
patent: 6860628 (2005-03-01), Robertson et al.
patent: 6870325 (2005-03-01), Bushell et al.
patent: 6940733 (2005-09-01), Schie et al.
patent: 7088059 (2006-08-01), McKinney et al.
patent: 7102902 (2006-09-01), Brown et al.
patent: 2004/0228116 (2004-11-01), Miller et al.
patent: 2005/0275354 (2005-12-01), Hausman, Jr. et al.
patent: 2006/0022916 (2006-02-01), Aiello
patent: 2006/0023002 (2006-02-01), Hara et al.
patent: 2006/0261754 (2006-11-01), Lee
patent: 2007/0029946 (2007-02-01), Yu et al.
patent: 2007/0040512 (2007-02-01), Jungwirth et al.
patent: 2007/0053182 (2007-03-01), Robertson
patent: 2007/0182699 (2007-08-01), Ha et al.
J. Qian et al., “New Charge Pump Power-Factor-Correction Electronic Ballast with a Wide Range of Line Input Voltage,” IEEE Transactions on Power Electronics, vol. 14, No. 1, Jan. 1999.
P. Green, “A Ballast that can be Dimmed from a Domestic (Phase-Cut) Dimmer,” IRPLCFL3 rev. b, International Rectifier, http://www.irf.com/technical-info/refdesigns/cfl-3.pdf, printed Mar. 24, 2007, Aug. 25, 2003.
J. Qian et al., “Charge Pump Power-Factor-Correction Technologies Part II: Ballast Applications,” IEEE Transactions on Power Electronics, vol. 15, No. 1, Jan. 2000.
“Chromaticity Shifts in High-Power White LED Systems due to Different Dimming Methods,” Solid-State Lighting, http://www.lrc.rpi.edu/programs/solidstate/completedProjects.asp?ID=76, printed May 3, 2007, no date.
Freescale Semiconductor, “Dimmable Light Ballast with Power Factor Correction,” Designer Reference Manual, M68HC08 Microcontrollers, DRM067, Rev. 1, Dec. 2005.
S. Chan et al., “Design and Implementation of Dimmable Electronic Ballast Based on Integrated Inductor,” IEEE Transactions on Power Electronics, vol. 22, No. 1, Jan. 2007.
M. Madigan et al., “Integrated High-Quality Rectifier-Regulators,” IEEE Transactions on Industrial Electronics, vol. 46, No. 4, Aug. 1999.
T. Wu et al., “Single-Stage Electronic Ballast with Dimming Feature and Unity Power Factor,” IEEE Transactions on Power Electronics, vol. 13, No. 3, May 1998.
F. Tao et al., “Single-Stage Power-Factor-Correction Electronic Ballast with a Wide Continuous Dimming Control for Fluorescent Lamps,” IEEE Power Electronics Specialists Conference, vol. 2, 2001.
Azoteq, “IQS17 Family, IQ Switch®—ProxSense™ Series, Touch Sensor, Load Control and User Interface,” IQS17 Datasheet V2.00.doc, Jan. 2007.
C. DiLouie, “Introducing the LED Driver,” EC&M, Sep. 2004.
S. Lee et al., “TRIAC Dimmable Ballast with Power Equalization,” IEEE Transactions on Power Electronics, vol. 20, No. 6, Nov. 2005.
L. Gonthier et al., EN55015 Compliant 500W Dimmer with Low-Losses Symmetrical Switches, 2005 European Conference on Power Electronics and Applications, Sep. 2005.
“Why Different Dimming Ranges? The Difference Between Measured and Perceived Light,” http://www.lutron.com/ballast/pdf/LutronBallastpg3.pdf, no date.
D. Hausman, “Real-Time Illumination Stability Systems for Trailing-Edge (Reverse Phase Control) Dimmers,” Technical White Paper, Lutron, version 1.0, Dec. 2004, http://www.lutron.com/technical—info/pdf/RTISS-TE.pdf.
“Light Dimmer Circuits,” www.epanorama.net/documents/lights/lightdimmer.html, printed Mar. 26, 2007, Nov. 18, 2004.
“Light Emitting Diode,” http://en.wikipedia.org/wiki/Light-emitting—diode, printed Mar. 27, 2007, no date.
“Color Temperature,” www.sizes.com/units/color—temperature.htm, printed Mar. 27, 2007, Oct. 10, 2002.
S. Lee et al., “A Novel Electrode Power Profiler for Dimmable Ballasts Using DC Link Voltage and Switching Frequency Controls,” IEEE Transactions on Power Electronics, vol. 19, No. 3, May 2004.
Y. Ji et al., “Compatibility Testing of Fluorescent Lamp and Ballast Systems,” IEEE Transactions on Industry Applications, vol. 35, No. 6, Nov./Dec. 1999.
National Lighting Product Information Program, Specifier Reports, “Dimming Electronic Ballasts,” vol. 7, No. 3, Oct. 1999.
Chambers Kent B.
Cirrus Logic Inc.
Hamilton & Terrile LLP
Le Tung X
Philogene Haissa
LandOfFree
Color variations in a dimmable lighting device with stable... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Color variations in a dimmable lighting device with stable..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color variations in a dimmable lighting device with stable... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3901018