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Class Information
Number: 315/224
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Impedance or current regulator in the supply circuit
Description: Systems having an impedance or a current or voltage regulator connected in the supply circuit of the load device.










Patents under this class:

Patent Number Title Of Patent Date Issued
8547025 Two-terminal current controller and related LED lighting device Oct. 1, 2013
8541955 Discharge lamp lighting device, projector, and discharge lamp lighting device control method Sep. 24, 2013
8536800 Illuminating device and controlling method thereof Sep. 17, 2013
8536797 Semiconductor light source apparatus and semiconductor light source control method Sep. 17, 2013
8536793 Controlling a current supplied to a load Sep. 17, 2013
8531127 Computer controlled power supply assembly for a LED array Sep. 10, 2013
8531126 White light emitting apparatus and line illuminator using the same in image reading apparatus Sep. 10, 2013
8531124 High pressure discharge lamp lighting device and illumination instrument Sep. 10, 2013
8531122 Circuit arrangement and method for operation of a discharge lamp Sep. 10, 2013
8525429 Method for controlling gas discharge lamps Sep. 3, 2013
8525427 Light-emitting diode lamp Sep. 3, 2013
8519630 Driving circuit capable of enhancing energy conversion efficiency and driving method thereof Aug. 27, 2013
8513904 Step-down hysteretic current LED driver implementing frequency regulation Aug. 20, 2013
8513903 Discharge lamp lighting device Aug. 20, 2013
8513898 Light emitting device that restores abnormal light emitting element Aug. 20, 2013
8513894 LED bulb, light emitting device control method, and light emitting device controller circuit with dimming function adjustable by AC signal Aug. 20, 2013
8508464 Backlight control circuit capable of distinguishing under current condition Aug. 13, 2013
8508182 Electrically connecting blower to power supply stage providing higher voltage Aug. 13, 2013
8508157 Power supply device for driving light emitting diode Aug. 13, 2013
8508145 DC/AC inverter Aug. 13, 2013
8508144 Power supply and display device including the same Aug. 13, 2013
8508143 Light emitting diode driving circuit Aug. 13, 2013
8502475 Discharge lamp ballast with feedback current control during an electrode heating operation Aug. 6, 2013
8502474 Primary side PFC driver with dimming capability Aug. 6, 2013
8502472 Light emitting diode driving apparatus and method for holding driving voltage thereof Aug. 6, 2013
8502466 Apparatus for LED lights which integrates a boost converter control module Aug. 6, 2013
8497640 Method for operating a fluorescent lamp Jul. 30, 2013
8492999 System and method for controlling electrical power of LED and LED projector having the same Jul. 23, 2013
8492990 Controller circuit for half wave LED light strings Jul. 23, 2013
8492989 Switched-mode power supply, LED lighting system and driver comprising the same, and method for electrically driving a load Jul. 23, 2013
8492985 Discharge lamp lighting apparatus Jul. 23, 2013
8487548 System and method for driving LED Jul. 16, 2013
8487541 Method to ensure ballast starting regardless of half cycle input Jul. 16, 2013
8487540 Variable light-level production using different dimming modes for different light-output ranges Jul. 16, 2013
8482221 Device driver providing compensation for aging Jul. 9, 2013
8482220 Lighting system with power factor correction control data determined from a phase modulated signal Jul. 9, 2013
8482217 High pressure discharge lamp ballast and light source apparatus Jul. 9, 2013
8482214 Apparatus and methods of operation of passive LED lighting equipment Jul. 9, 2013
8482213 Electronic ballast with pulse detection circuit for lamp end of life and output short protection Jul. 9, 2013
8482212 Light sources incorporating light emitting diodes Jul. 9, 2013
8476846 Stochastic signal density modulation for optical transducer control Jul. 2, 2013
8476839 Electronic method to improve the starting characteristics of direct current arc lamps Jul. 2, 2013
8476837 Transistor ladder network for driving a light emitting diode series string Jul. 2, 2013
8471499 Light source driver Jun. 25, 2013
8466632 LED device Jun. 18, 2013
8466630 Discharge lamp lighting apparatus Jun. 18, 2013
8461770 Light-emitting diode driver Jun. 11, 2013
8461768 Transmitter and information processing device converting supply voltage to drive voltage Jun. 11, 2013
8461767 Power factor control for an LED bulb driver circuit Jun. 11, 2013
8459802 High-pressure discharge lamp lighting device with current control, high-pressure discharge lamp device using same, projector using said high-pressure discharge lamp device, and high-pressure d Jun. 11, 2013











 
 
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