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Class Information
Number: 315/287
Name: Electric lamp and discharge devices: systems > Pulsating or a.c. supply > Periodic-type current and/or voltage regulator in the supply circuit
Description: Systems provided with means in the supply circuit of the load device to vary the current or voltage applied to the load device between a low and high value at constantly recurring intervals.

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8704452 Illumination device with adjustable luminance and luminance adjustment method thereof Apr. 22, 2014
8680870 Energy-recycling burn-in apparatus for electronic ballasts and a method of burning-in electronic ballasts Mar. 25, 2014
8664877 Light driving apparatus Mar. 4, 2014
8648544 Illumination lighting apparatus, illumination apparatus, and illumination system Feb. 11, 2014
8638044 Variable voltage control apparatus and lighting apparatus incorporating control apparatus Jan. 28, 2014
8638049 Driving device, light emitting diode driving device and driving method Jan. 28, 2014
8598802 Triac dimmer compatible WLED driving circuit and method thereof Dec. 3, 2013
8581515 Light emitting diode driver Nov. 12, 2013
8569964 Control circuit of light-emitting element Oct. 29, 2013
8558477 Method and device for obtaining conduction angle, method and device for driving LED Oct. 15, 2013
8525431 Modulated power lighting mode for lighting apparatus of high-pressure discharge lamp and projector Sep. 3, 2013
8513893 High-pressure discharge lamp light-up device, high-pressure discharge lamp apparatus using same, projector using high-pressure discharge lamp apparatus, and light-up method for high-pressure d Aug. 20, 2013
8508147 Dimmer circuit applicable for LED device and control method thereof Aug. 13, 2013
8502477 Dimmable power supply Aug. 6, 2013
8461766 Driver circuit with primary side state estimator for inferred output current feedback sensing Jun. 11, 2013
8461772 High pressure discharge lamp ballast and light source apparatus Jun. 11, 2013
8436555 DC low voltage distribution box for indoor multi LEDs lamp May. 7, 2013
8436557 Ballast control circuit and ballast control method for gas discharge lamp May. 7, 2013
8427075 Constant current output sink or source Apr. 23, 2013
8410714 Illuminating device Apr. 2, 2013
8410719 Electronic ballast and method for controlling at least one light source Apr. 2, 2013
8388158 Appliance with an improved solid state device lighting Mar. 5, 2013
8384301 Light source system capable of dissipating heat Feb. 26, 2013
8378583 Feedforward control of semiconductor light sources Feb. 19, 2013
8344645 Method of driving discharge lamp, driving device, and projector Jan. 1, 2013
8342695 High pressure discharge lamp lighting apparatus and projector Jan. 1, 2013
8344644 Electronic ballast for HID lamps with active lamp power control Jan. 1, 2013
8330385 Light bar Dec. 11, 2012
8330386 Remote control and adjustment apparatus disposed in an energy saving lighting apparatus and a control system of the same Dec. 11, 2012
8319451 Two light level control circuit Nov. 27, 2012
8319722 Backlight unit for liquid crystal display device and driving method driving the same Nov. 27, 2012
8310171 Line voltage dimmable constant current LED driver Nov. 13, 2012
8294371 LED traffic signal with synchronized power pulse circuit Oct. 23, 2012
8264160 Advanced electronic ballasts Sep. 11, 2012
8258717 High pressure discharge lamp light source device Sep. 4, 2012
8217586 Apparatus and method for dimming a backlight with pseudo-random phase delay Jul. 10, 2012
8217580 Flashlight for alarm systems Jul. 10, 2012
8217592 Light emitting diode driving device and driving method thereof Jul. 10, 2012
8203287 Pulse width modulation control device Jun. 19, 2012
8193727 Lamp end of life protection circuit and method for an electronic dimming ballast Jun. 5, 2012
8194113 Pulse-modulation-signal generating device, light-source device, and optical scanning device Jun. 5, 2012
8167438 Light source device, projector, and driving method of discharge lamp May. 1, 2012
8148907 Dimmable power supply Apr. 3, 2012
8143798 Driving device and driving method for discharge lamp, light source device, and image display apparatus Mar. 27, 2012
8143802 Method of driving discharge lamp, driving device, and projector Mar. 27, 2012
8129920 Discharge lamp ballast and fixture with controlled preheating Mar. 6, 2012
8115405 High pressure discharge lamp lighting device and luminaire using same Feb. 14, 2012
8111002 Device and method for operating a high-pressure discharge lamp Feb. 7, 2012
8106596 Light source driving circuit Jan. 31, 2012
8089214 Driving method and driving device for discharge lamp, light source device, and image display device Jan. 3, 2012

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