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Class Information
Number: 315/246
Name: Electric lamp and discharge devices: systems > Pulsating or a.c. supply
Description: Systems wherein the load devices in the system is supplied with either pulsating or alternating current or potential (but not both).










Sub-classes under this class:

Class Number Class Name Patents
315/268 Discharge control discharge device load 17
315/267 Electromagnetic influenced discharge device load 78
315/283 Inductance in the supply circuit 155
315/248 Induction-type discharge device load 673
315/287 Periodic-type current and/or voltage regulator in the supply circuit 222
315/260 Plural cathode and/or anode discharge device load 40
315/250 Plural load device systems 118
315/249 Potential node-type discharge device load 5
315/276 Transformer in the supply circuit 611
315/247 With power factor control device 811


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12

Patent Number Title Of Patent Date Issued
8283875 Holding current circuits for phase-cut power control Oct. 9, 2012
8278834 PWM control method and device and light adjusting device Oct. 2, 2012
8278835 Modular electronic ballast Oct. 2, 2012
8278857 Motor control device and controller thereof Oct. 2, 2012
8269426 Light source apparatus, projector, and light source apparatus drive method Sep. 18, 2012
8269424 Discharge lamp lighting device, projector, and driving method of discharge lamp Sep. 18, 2012
8264165 Method and system for dimming an offline LED driver Sep. 11, 2012
8264170 Discharge lamp lighting device, method of driving discharge lamp, and projector Sep. 11, 2012
8264633 Backlight unit and liquid crystal display using the same Sep. 11, 2012
8258707 Lighting device with a LED used for sensing Sep. 4, 2012
8248002 System for controlling light in dependence of time of flight signal Aug. 21, 2012
8247985 Light tube and power supply circuit Aug. 21, 2012
8246175 Lighting device, light source device, projector, and discharge lamp lighting method Aug. 21, 2012
8242702 Method for driving a fluorescent lamp, and lamp ballast Aug. 14, 2012
8232740 Capacitive current-sharing control circuit for LED lamp string Jul. 31, 2012
8227997 Lamp driving circuit Jul. 24, 2012
8227996 Method and apparatus for LED dimming Jul. 24, 2012
8227992 High-pressure discharge lamp Jul. 24, 2012
8222825 Dimmer for a light emitting device Jul. 17, 2012
8222830 Discharge lamp lighting device, lighting fixture, and lighting system Jul. 17, 2012
8222834 HID lamp ballast with controlled DC step down circuit Jul. 17, 2012
8217593 Method and driving unit for driving a gas-discharge lamp Jul. 10, 2012
8217591 Power source sensing dimming circuits and methods of operating same Jul. 10, 2012
8217586 Apparatus and method for dimming a backlight with pseudo-random phase delay Jul. 10, 2012
8217583 Gas-discharge lamp controller utilizing a novel reheating frequency generation mechanism Jul. 10, 2012
8212489 Circuit arrangement and method for starting and operating one or more discharge lamps Jul. 3, 2012
8212490 Light source device, image display apparatus, and method of driving light emitting element Jul. 3, 2012
8212500 System for controlling light in dependence of time-of-flight signal Jul. 3, 2012
8213194 Control device for a flyback converter Jul. 3, 2012
8207691 Methods and apparatus for operating groups of high-power LEDS Jun. 26, 2012
8207677 Lighting equipment Jun. 26, 2012
8203276 Phase controlled dimming LED driver system and method thereof Jun. 19, 2012
8203277 Efficient electrically isolated light sources Jun. 19, 2012
8203288 Light emitting diode array driving apparatus Jun. 19, 2012
8193731 Package of constant-current supplying chip and LED lamp driven by alternating current Jun. 5, 2012
8193722 Circuit arrangement having a transformation apparatus and operating method for a lamp using a circuit arrangement having a transformation apparatus Jun. 5, 2012
8193719 Using pulse density modulation for controlling dimmable electronic lighting ballasts Jun. 5, 2012
8188672 High-pressure discharge lamp system and projector using the same May. 29, 2012
8183782 High-pressure discharge lamp with improved ignitability and high-voltage pulse generator May. 22, 2012
8183798 Variable light control system and method using momentary circuit interrupt May. 22, 2012
8174201 Self-oscillating transformerless electronic ballast May. 8, 2012
8169151 DC/AC converter and controller thereof May. 1, 2012
8169150 Powering and controlling light emitting diodes via thermally separated arrays of dissipative active elements May. 1, 2012
8164266 High pressure discharge lamp lighting apparatus Apr. 24, 2012
8164281 Luminaire system and method Apr. 24, 2012
8148907 Dimmable power supply Apr. 3, 2012
8143799 Light emitting diode driving circuit Mar. 27, 2012
8143798 Driving device and driving method for discharge lamp, light source device, and image display apparatus Mar. 27, 2012
8143793 Device and method for periodic diode actuation Mar. 27, 2012
8138685 Power converting circuit and controller thereof Mar. 20, 2012

1 2 3 4 5 6 7 8 9 10 11 12










 
 
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