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Class Information
Number: 315/291
Name: Electric lamp and discharge devices: systems > Current and/or voltage regulation
Description: Systems which include means to regulate the current and/or voltage supplied to the load device.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7557520 |
Light source driving circuit |
Jul. 7, 2009 |
| 7557519 |
Controlling power to light-emitting device |
Jul. 7, 2009 |
| 7557518 |
Solid-state, color-balanced backlight with wide illumination range |
Jul. 7, 2009 |
| 7557517 |
Primary side current balancing scheme for multiple CCF lamp operation |
Jul. 7, 2009 |
| 7557516 |
Resonant inverter |
Jul. 7, 2009 |
| 7554273 |
Protection for external electrode fluorescent lamp system |
Jun. 30, 2009 |
| 7554272 |
Low noise electroluminescent lamp (EL) driver and method therefor |
Jun. 30, 2009 |
| 7554271 |
Single stage PFC and power converter circuit |
Jun. 30, 2009 |
| 7553152 |
Flame detector trapezoidal excitation generator output control circuit and method |
Jun. 30, 2009 |
| 7551153 |
Combined exponential/linear RGB LED I-sink digital-to-analog converter |
Jun. 23, 2009 |
| 7550933 |
Offline control circuit of LED driver to control the maximum voltage and the maximum current of LEDs |
Jun. 23, 2009 |
| 7550931 |
Controlled lighting methods and apparatus |
Jun. 23, 2009 |
| 7550930 |
Method and device for lighting an electronic or electromechanical apparatus |
Jun. 23, 2009 |
| 7550929 |
Power system and method for driving plural lamps |
Jun. 23, 2009 |
| 7548029 |
Bi-directional current sensing by monitoring VS voltage in a half or full bridge circuit |
Jun. 16, 2009 |
| 7545369 |
Methods and apparatus to improve efficiency in cold cathode fluorescent light controllers |
Jun. 9, 2009 |
| 7545106 |
Discharge lamp driving device and driving method |
Jun. 9, 2009 |
| 7545105 |
Driving circuit for piezoelectric lamps |
Jun. 9, 2009 |
| 7541752 |
Illuminating device and liquid crystal display |
Jun. 2, 2009 |
| 7541750 |
DC to DC converter with load open detection and related method thereof |
Jun. 2, 2009 |
| 7541749 |
Current-mode resonant inverter circuit for discharge lamp |
Jun. 2, 2009 |
| 7541748 |
Discharge lamp lighting device |
Jun. 2, 2009 |
| 7541746 |
Lamp driver circuit with power factor correction circuit coupled to direct-current to direct-current power converter |
Jun. 2, 2009 |
| 7541744 |
Electronic ballast for a high-pressure discharge lamp having a current-measuring device |
Jun. 2, 2009 |
| 7538497 |
Constant current driver, back light source and color liquid crystal display |
May. 26, 2009 |
| 7538496 |
Display apparatus |
May. 26, 2009 |
| 7535266 |
Light emitting device driving circuit |
May. 19, 2009 |
| 7535184 |
Photopolymerization apparatus |
May. 19, 2009 |
| 7535183 |
Apparatus and method to provide a hybrid linear/switching current source, such as for high-efficiency, wide dimming range light emitting diode (LED) backlighting |
May. 19, 2009 |
| 7535182 |
Flat panel display device having thermostat |
May. 19, 2009 |
| 7531971 |
Backlight units and display devices |
May. 12, 2009 |
| 7531970 |
Power source driving circuits and controllers thereof |
May. 12, 2009 |
| 7531969 |
Arc lamp improvements |
May. 12, 2009 |
| 7531966 |
Lamp ballast circuit |
May. 12, 2009 |
| 7531965 |
Discharge centering lamp lighting device |
May. 12, 2009 |
| 7528555 |
LED controller IC using only one pin to dim and set a maximum LED current |
May. 5, 2009 |
| 7528554 |
Electronic ballast having a boost converter with an improved range of output power |
May. 5, 2009 |
| 7528553 |
Lighting control apparatus for vehicle lighting device |
May. 5, 2009 |
| 7528551 |
LED control system |
May. 5, 2009 |
| 7525780 |
Liquid crystal television and backlight power supplying circuit |
Apr. 28, 2009 |
| 7525260 |
Discharge lamp lighting apparatus |
Apr. 28, 2009 |
| 7525259 |
Primary side regulated power supply system with constant current output |
Apr. 28, 2009 |
| 7525256 |
HID buck and full-bridge ballast control IC |
Apr. 28, 2009 |
| 7525254 |
Vehicle lighting methods and apparatus |
Apr. 28, 2009 |
| 7524085 |
Series wiring of highly reliable light sources |
Apr. 28, 2009 |
| 7521912 |
Power supply apparatus |
Apr. 21, 2009 |
| 7521878 |
Applications of halogen converter control IC |
Apr. 21, 2009 |
| 7521877 |
Dimmer circuit for a discharge lighting apparatus |
Apr. 21, 2009 |
| 7521876 |
Electronic ballast with lamp type determination |
Apr. 21, 2009 |
| 7519484 |
Power supply monitor |
Apr. 14, 2009 |
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