Match Document Document Title
9041306 Dimmable light source with temperature shift  
An illumination device (1) comprises: input terminals (2) for coupling to AC mains;a LED string (10) connected in series with the input terminals;a rectifier (30), having input terminals connected...
9013111 Full-bridge electronic ballast having simplified continuous-conduction-mode charge pump PFC circuit  
The configurations of an electronic ballast are provided in the present invention. The proposed electronic ballast includes a filter circuit having a first and a second output terminals, a...
8783876 Projector that controls discharge lamp in response to deterioration  
A projector that outputs a first image and a second image alternately, includes a discharge lamp driving section that supplies, to a discharge lamp, a drive current that drives the discharge lamp;...
8736541 Reducing scrolling effect for LCD lamps  
A liquid crystal display (LCD) device's microcontroller is used drive an LCD lamp ballast such that the scrolling effect from its light leakage may be reduced to a visually imperceptible level. A...
8710758 Dimmer system and damper circuit thereof  
A damper circuit is operable to dampen resonance of an electromagnetic interference filter when a phase dimmer activates. The damper circuit includes a capacitor and a bipolar junction transistor...
8502462 Voltage detection module  
The voltage detection module according to the invention comprises: a first electric terminal; a second ground terminal; a load resistor, connected to the first electric terminal; a main gas-filled...
8395333 Electro magnetic ballast for a gas discharge lamp  
An electro magnetic ballast (110) for a gas discharge lamp (2) comprises: input terminals (3), for receiving a mains voltage; lamp connector terminals (4), for receiving a lamp; a controllable...
8357556 Method of protecting semiconductor chips from mechanical and ESD damage during handling  
A method and apparatus are provided for protecting a semiconductor device from damage. The method may include the steps of providing an active semiconductor device on a surface of a semiconductor...
7283131 Image display apparatus  
An image display apparatus having a plurality of image forming devices. In an output circuit provided between constant voltage supplies and wiring for driving each of the image forming devices,...
7208884 Discharge lamp lighting circuit with an open protection circuit  
A discharge lamp lighting circuit includes an open protection circuit. The discharge lamp lighting circuit includes an open protection circuit and an over-voltage detecting circuit. The open...
6841936 Fast recovery electron multiplier  
An improved electron multiplier bias network that limits the response of the multiplier when the multiplier is faced with very large input signals, but then permits the multiplier to recover...
6495969 Series-resonant ballast having overload control  
An inverter is powered from a DC voltage whose instantaneous absolute magnitude is equal to that of the AC power line voltage except for being prevented from falling below a level equal to half...
6091201 Method and apparatus for accommodating multiple dimming strategies  
An input circuit for a dimming circuit control unit having a single input signal protocol includes a first input line to receive a first input voltage signal and a second input line to receive a...
5986412 Single ballast for powering plural high intensity discharge lamps  
A ballast circuit for a plurality of serially connected, high pressure gas discharge lamps comprises an electromagnetic ballast arrangement receptive of an input power signal, providing an output...
5962979 Asymmetrical bus capacitors  
A capacitor network includes a plurality of capacitors in series. Each capacitor has a preselected capacitance and breakdown voltage. The sum of the breakdown voltages of all the capacitors is at...
5959411 One pin IC control circuit for a discharge lamp  
A circuit arrangement for supplying a discharge lamp comprises a control circuit which is provided with an integrated circuit. Means for generating a signal which is a measure of the lamp voltage...
5854539 Electroluminescent lamp driver circuit with signal tracking  
An electroluminescent lamp is driven by a driving circuit that can supply an approximately sinusoidal signal, a bi-directional sawtooth signal or a single-ended sawtooth signal. Switches...
5804926 Lighting circuit that includes a comparison of a "flattened" sinewave to a full wave rectified sinewave for control  
A gas discharge lamp electronic ballast circuit including a gas discharge lamp (51); a rectifier circuit (11a, 11b, 11c, 11d, 13) responsive to AC power for providing a full wave rectified...
5625258 Clocked power supply  
A clocked power supply is proposed which contains a fault current detection means (32) which evaluates a voltage drop occurring at an ohmic measuring resistor (25), and emits a switch-off signal...
5583395 Fluorescent device having a fluorescent starter which precisely controls heating time and absolute synchronism of fire point  
A new fluorescent device including an electronic fluorescent starter, a phase leading capacitor, a ballast, a bridge rectifier, a fluorescent lamp, a brightness compensation circuit, and a control...
RE35220 Two terminal controller  
A two-terminal, alternating current power control device connected in an electrical path between a load and a remote switch, comprising a current switching device, a controlling device and a...
5491388 Power regulator of discharge lamp and variable color illumination apparatus using the regulator  
A current supplied to a discharge lamp (100) is an A.C. current having a predetermined frequency from an inverter circuit (70), and its power control is carried out by changing the current setting...
5485058 Touch dimmer system  
A key touch dimmer includes a switching device through which AC line current is passed to brighten a lamp in response to a control signal generated by a microprocessor. The microprocessor receives...
5477109 Discharge lamp fast preheat circuit independent of type of ballast  
A circuit arrangement for preheating electrodes of a discharge lamp connected in series with a ballast by means of a supply voltage of alternating polarity. The circuit arrangement is provided...
5455491 Power saving circuitry  
Power saving circuitry is provided for use with fluorescent lights, inductive loads and resistive loads. The circuitry comprises a power circuit connectable to an alternating circuit power supply...
5319285 Starting circuit for a high intensity discharge lamp  
A starting circuit is used in combination with a high intensity discharge lamp having electrodes. An inductor is in series with the electrodes of the lamp, and a first switching transistor is...
5291101 Electronic ballast for a discharge lamp with current sensing  
An electronic ballast for use with a fluorescent lamp. A pair of oppositely poled diodes connected in parallel with a transformer used to drive the switching transistors of an inverter in the...
5266869 Discharge lamp lighting apparatus having output impedance which limits current flow therethrough after start of discharging  
A discharge lamp lighting apparatus comprises a transformer for stepping up an AC power source voltage from an AC power source to produce a high voltage as an output voltage required for lighting...
5255277 Electronic pulse width controller for flashlamp pumped lasers  
A flashlamp pumped laser is controlled to emit a series of narrow pulse width laser pulses in quick succession. A control circuit associated with the flashlamp receives firing signals of limited...
5214354 Electronic control module (ECM) for controlling lighting functions of a lamp bulb and method of manufacture  
A new and improved electronic control module (ECM) for controlling lighting functions of an incandescent light bulb and method of manufacturing the ECM. The ECM is installed, such as by press...
5204587 Fluorescent lamp power control  
A fluorescent lamp power control having an input conditioning section, a lamp driver section, and a power command interface and control section to control power to fluorescent lamps. An external...
5187413 Low pressure discharge lamp apparatus  
A low pressure discharge lamp apparatus has a low pressure discharge lamp with an arc tube. The arc tube has a first end and a second end, each with electrodes which define a discharge space...
5175474 Power source for lighting apparatus  
An apparatus for operating discharge lamp. The apparatus includes a source of electrical power, switching devices for switching the electrical power, a control circuit for controlling the...
5164636 Actuator for flashing light  
The actuator is connected in series between the power supply and the flashing light. It includes a switch which is connected in series between the power supply and the flashing light so that when...
5162702 Flashing light warning apparatus  
In flashing light warning apparatus of a type having a voltage source (U), a main blocking transformer (HW), a flash tube (R), an ignition device (Z), a first and a third storage condenser (K1,...
5150018 Gas discharge lamp with grid and control circuits therefor  
The combination of a fluorescent lamp with a grid between its electrodes and control equipment for operating the lamp in an on condition and an off condition by the application of pulses to the grid.
5126634 Lamp bulb with integrated bulb control circuitry and method of manufacture  
An incandescent light bulb or the like and process for manufacturing same wherein an electronic control module (ECM) is installed, such as by press fitting into a dielectric insulating material at...
5111112 Light string control apparatus  
A light string controlling apparatus includes a bridge rectifier, an RC filter, an signal generator, and a silicon controlled rectifier. The signal generator provides the gate of the silicon...
5097180 Flickering candle lamp  
A self contained battery operated table lamp for use in restaurants, and the like. The lamp includes an electric light which is energized on an intermittent basis by a switching circuit to assure...
5081400 Power efficient sustain drivers and address drivers for plasma panel  
An improved address driver circuit for plasma panels, particularly useful with an independent sustain and address plasma panel. Address pulse generators for one panel address axis are coupled to...
5053677 Parking lamp operating system  
A parking lamp operating system reduces the electrical load on the battery of a vehicle, such as a truck, during periods when the vehicle engine is off but the parking lamps of the vehicle remain...
5039919 Control arrangement for electronic ballast  
A self-oscillating half-bridge inverter is powered from a power-line-operated DC voltage source by way of an EMI filter. The inverter is loaded by way of a series-tuned high-Q LC circuit connected...
5030890 Two terminal incandescent lamp controller  
A two-terminal, alternating current power control device connected in an electrical path between a load and a remote switch, comprising a current switching device, a controlling device and a...
5023518 Ballast circuit for gaseous discharge lamp  
A ballast circuit for a gaseous discharge lamp, particularly a neon light, includes a diode bridge rectifier for producing a d-c voltage from an a-c input and a transformer with a secondary...
5015921 Soft start solid state switch  
The junction temperature rise of a power MOSFET serially connected to a lamp whose resistance nonlinearly increases during turn-on is moderated by the use of control circuitry which initially sets...
5012392 Automatic battery powered video light  
An automatic battery powered video light (10) is supplied power by a d.c. battery (16). A light (20) is connected between a first terminal of the battery (16) and a MOSFET switch (46), which is...
5004957 Dimming control circuit  
A circuit and a method for controlling the dimming of incandescent lights using a pair of antiparallel connected SCRs which are fired at the same frequency as the frequency of the AC line power to...
5001402 Illuminated aerial marker  
An illuminated aerial marker for a high voltage transmission line using a spherical colored opaque capacitor with gas filled lamps electrically connected, exterior to the capacitor with one...
4996462 Electronic ballast for fluoroscent lamps  
Electronic ballasts are essentially composed of a series connection of a harmonic filter that has its input side connected to the AC line, a rectifier and an inverter to which is connected at...
4958106 High-pressure sodium discharge lamp  
A circuit arrangement for operating a high-pressure sodium lamp is provided with two lamp connection points. The circuit arrangement comprises a controlled main switching element, a control...