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Class Information
Number: 315/209R
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit
Description:
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7245086 |
Lamp operating circuit and operating method for a lamp having active current measurement |
Jul. 17, 2007 |
| 7242153 |
Pulse width modulation inverter circuit and control method thereof |
Jul. 10, 2007 |
| 7239089 |
Power supply apparatus for high pressure discharge lamp |
Jul. 3, 2007 |
| 7235933 |
Reversible dimmer device of gas discharge lamps and the control method for light adjusting thereof |
Jun. 26, 2007 |
| 7233112 |
PWM switching power supply control methods |
Jun. 19, 2007 |
| 7230388 |
Lighting of discharge lamp by frequency control |
Jun. 12, 2007 |
| 7230387 |
Electroluminescent device including a programmable pattern generator |
Jun. 12, 2007 |
| 7221107 |
Low frequency electronic ballast for gas discharge lamps |
May. 22, 2007 |
| 7221100 |
Gas discharge lamp power supply |
May. 22, 2007 |
| 7218065 |
Discharge lamp lighting circuit |
May. 15, 2007 |
| 7218064 |
Cold cathode flat fluorescent lamp and driving method therefor |
May. 15, 2007 |
| 7218061 |
Circuit arrangement for producing a control signal for the purpose of dimming at least one lamp |
May. 15, 2007 |
| 7218059 |
Discharge-lamp control device |
May. 15, 2007 |
| 7211970 |
Discharge lamp lighting device and lighting unit |
May. 1, 2007 |
| 7211965 |
High intensity discharge lamp with current sense resistor |
May. 1, 2007 |
| 7211964 |
Lamp including phase-control power controller with digital RMS load voltage regulation |
May. 1, 2007 |
| 7208887 |
Ballast having multiple circuit failure protection and method for ballast circuit protection |
Apr. 24, 2007 |
| 7208886 |
Apparatus for driving cold cathode fluorescent lamps |
Apr. 24, 2007 |
| 7208884 |
Discharge lamp lighting circuit with an open protection circuit |
Apr. 24, 2007 |
| 7208883 |
Current detection circuit, and power supply apparatus, power supply system and electronic apparatus using the current detection circuit |
Apr. 24, 2007 |
| 7205725 |
Electronic stabilizer used for hand-held lamp |
Apr. 17, 2007 |
| 7205724 |
Backlight driving system for a liquid crystal display device |
Apr. 17, 2007 |
| 7202609 |
Noise reduction in a power converter |
Apr. 10, 2007 |
| 7201444 |
Child car seat reading light |
Apr. 10, 2007 |
| 7199530 |
Digital ballast |
Apr. 3, 2007 |
| 7199528 |
Control circuit for maintaining constant power in power factor corrected electronic ballasts and power supplies |
Apr. 3, 2007 |
| 7196480 |
Method of soft-starting a switching power supply containing phase-control clipping circuit |
Mar. 27, 2007 |
| 7196479 |
Electronic ballast having a protective circuit for a switching transistor of a converter |
Mar. 27, 2007 |
| 7196478 |
Circuit arrangement |
Mar. 27, 2007 |
| 7193372 |
Electronic ballast with voltage converter having improved damping arrangement |
Mar. 20, 2007 |
| 7187134 |
Method of triggering at least one illuminating means and triggering circuit for practicing such method |
Mar. 6, 2007 |
| 7187132 |
Ballast with filament heating control circuit |
Mar. 6, 2007 |
| 7183725 |
Backlight inverter system and control method for starting the same |
Feb. 27, 2007 |
| 7183724 |
Inverter with two switching stages for driving lamp |
Feb. 27, 2007 |
| 7183723 |
PWM illumination control circuit with low visual noise for driving LED |
Feb. 27, 2007 |
| 7183721 |
Ballast with circuit for detecting and eliminating an arc condition |
Feb. 27, 2007 |
| 7180247 |
Load control circuit |
Feb. 20, 2007 |
| 7176639 |
Electronic ballast and controlling method thereof |
Feb. 13, 2007 |
| 7176638 |
Discharge lamp lighting circuit |
Feb. 13, 2007 |
| 7170234 |
Light emitting apparatus generating white light by mixing of light of a plurality of oscillation wavelengths |
Jan. 30, 2007 |
| 7170231 |
Lamp that sets desired RMS load voltage with variable pulse width modulation |
Jan. 30, 2007 |
| 7166964 |
Lamp containing pulse width modulated voltage conversion circuit |
Jan. 23, 2007 |
| 7164241 |
Method and apparatus for driving a gas discharge lamp |
Jan. 16, 2007 |
| 7164238 |
Energy savings device and method for a resistive and/or an inductive load and/or a capacitive load |
Jan. 16, 2007 |
| 7164237 |
Circuit arrangement for operating discharge lamps |
Jan. 16, 2007 |
| 7164235 |
Vehicular lamp |
Jan. 16, 2007 |
| 7161310 |
Backlight apparatus for liquid crystal display |
Jan. 9, 2007 |
| 7161309 |
Protecting a cold cathode fluorescent lamp from a large transient current when voltage supply transitions from a low to a high voltage |
Jan. 9, 2007 |
| 7161307 |
Power factor correction apparatus with embedded DC--DC converter |
Jan. 9, 2007 |
| 7161306 |
Multi-phase input ballast with dimming and method therefor |
Jan. 9, 2007 |
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