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| Number | Title | Issue Date |
| 7339330 | Methods and circuits for instant hot restart of high intensity discharge lamps A lamp ballast for operating a high intensity discharge lamp includes an electronic ballast circuit to supply an operating voltage to the discharge lamp, and an igniter circuit to supply starting pulses to the discharge lamp in a cold state and to supply hot restrik... | 03/04/2008 |
| 7321202 | System and method for reducing flicker of compact gas discharge lamps at low lamp light output level A lamp lighting system allows dimming of a compact gas discharge lamp to a low light output level without perceptible flicker. When the system receives a request to dim the lamp to the low level, the lamp is operated at an intermediate output level prior to operatin... | 01/22/2008 |
| 7285923 | Display apparatus and driving pulse control method thereof An apparatus and method is disclosed for controlling a display driving pulse to drive an LED display. In one embodiment, an RGB signal is received and a period during which all the LEDs are switched off is detected. Also, the period during which an image is not bein... | 10/23/2007 |
| 7253568 | High pressure discharge lamp lighting apparatus It is an object of the present invention to provide a high pressure discharge lamp lighting apparatus, has a structure to control decrease of illuminance on a screen which is thought to be a cause of wear of an anode in an early stage of the life span. The high pres... | 08/07/2007 |
| 7239092 | Limited open circuit voltage ballast A lighting system employs a pair of ballast input stages (21) operable to oscillate at different oscillating frequency (f1, f2) upon an initial powering of the ballast input stages (21). The lighting system further employs a pair of balla... | 07/03/2007 |
| 7176656 | Tool with battery pack A handheld tool has an attached position in which the tool is removably attached to a battery pack. The battery pack has an auxiliary battery and output terminals for outputting electricity from the auxiliary battery. The tool includes a load and a primary battery. ... | 02/13/2007 |
| 7125588 | Pulsed plasma CVD method for forming a film A method of forming an insulating ceramic film or a metallic film by a plasma CVD process in which a high density plasma is generated in the presence of a magnetic field wherein the electric power for generating the plasma has a pulsed waveform. The electric power t... | 10/24/2006 |
| 7091676 | Arc maintenance device for high density discharge lamps including an adaptive wave form monitor A supplemental arc maintenance electrical supply for a high density discharge (HID) lamp (L) for applying a high frequency supplemental arc voltage to maintain the arc during a period of unstable or intermittent AC supply in addition to or in lieu of the voltage or ... | 08/15/2006 |
| 7061191 | System and method for reducing flicker of compact gas discharge lamps at low lamp light output level A lamp lighting system allows dimming of a compact gas discharge lamp to a low light output level without perceptible flicker. When the system receives a request to dim the lamp to the low level, the lamp is operated at an intermediate output level prior to operatin... | 06/13/2006 |
| 7049756 | Capacitive load driving circuit, capacitive load driving method, and apparatus using the same A capacitive load driving circuit (1) for charging and discharging a capacitive load (11) is provided with a voltage divider (5) for dividing a power supply voltage (VH) into a plurality of different voltages (V1–V9), a plurality... | 05/23/2006 |
| 7045465 | Particle-removing method for a semiconductor device manufacturing apparatus In a semiconductor device manufacturing apparatus that processing a substrate by applying a voltage to a gas to create a plasma, positively charged particles are trapped or guided at the instant that the cathode voltage is stopped, by an electrode to which is impart... | 05/16/2006 |
| 7005634 | Ionization apparatus An ionization apparatus according to the present invention has a mechanism for causing metal ions emitted from an ion emitter to attach to an introduced target gas so as to generate ions of the sample gas and emits the ions of the sample gas to a mass spectrometer. ... | 02/28/2006 |
| 6956335 | Circuit arrangement A circuit arrangement for operating a lamp including a first circuit and a second circuit. The first circuit generates a second DC voltage from a first DC voltage and includes a transformer. The second circuit is coupled to the secondary winding of the transformer a... | 10/18/2005 |
| 6919693 | High-voltage transformer and discharge lamp driving apparatus A high-voltage transformer for lighting a plurality of discharge lamps has a primary coil for inputting an AC voltage and a secondary coil for outputting a predetermined AC voltage higher than the AC voltage inputted. The primary coil has a starter primary winding f... | 07/19/2005 |
| 6913703 | Method of adjusting the thickness of an electrode in a plasma processing system A method of adjusting the relative thickness of an electrode assembly (10) in a plasma processing system (6) capable of supporting a plasma (20, 120) in a reactor chamber (16). The electrode assembly is arranged in the reactor chamber and... | 07/05/2005 |
| 6906950 | Magneto-resistive memory cell with shape anistropy and memory device thereof A magneto-resistive memory comprising magneto-resistive memory cells is disclosed, comprising a pinned magnetic layer and a free magnetic layer. The two magnetic layers are formed having widened regions at the ends of the layers. As such, the shape made out by the m... | 06/14/2005 |
| 6507333 | Tribo-addressed and tribo-supperessed electric paper A display is provided with an insulative layer with electrical properties which have been selected so that the display can be addressed with a stylus and which minimizes the effects of stray triboelectrically generated charges. Also provided is a method o... | 01/14/2003 |
| 6504323 | High pressure discharge lamp driving apparatus, luminaire and high pressure discharge lamp driving method Disclosed a high pressure discharge lamp driving apparatus for driving a high pressure discharge lamp during a stable operation thereof with an AC lamp current alternating for opposite half-cycle periods, the apparatus comprising an AC lamp current supply... | 01/07/2003 |
| 6465969 | Electroluminescent display intelligent controller The present invention includes a smart controller for electroluminescent lamps which compensates for a range of RC time constants and adjusts its output frequency accordingly such that a relatively uniform light output is obtained on all illuminated areas... | 10/15/2002 |
| 6225754 | Operating method and operating apparatus for a high pressure discharge lamp A method and apparatus for operating a high pressure discharge lamp is disclosed. Oscillation in the discharge arc periphery, a problem that occurs with high frequency operation, is eliminated. A high pressure discharge lamp is operated by applying theret... | 05/01/2001 |
| 6111362 | Controlling color shift in EL phosphors An EL lamp is powered by bursts of high frequency signal repeated at low frequency, i.e. having a low duty cycle envelope, in order to shift the color of light emitted by the phosphor in the lamp without degrading the life of the lamp. The bursts include ... | 08/29/2000 |
| 6107757 | Fluorescent lamp operating apparatus A fluorescent lamp operating apparatus is used for operating a fluorescent lamp, which includes a glass tube coated with a phosphor and has at least mercury sealed therein, by generating an electric field in a direction from an inner surface of the glass ... | 08/22/2000 |
| 6005356 | Operating method and operating apparatus for a high pressure discharge lamp A method and apparatus for operating a high pressure discharge lamp is disclosed. Oscillation in the discharge arc periphery, a problem that occurs with high frequency operation, is eliminated. A high pressure discharge lamp is operated by applying theret... | 12/21/1999 |
| 5982098 | Smart logic switching uninterruptible power source An uninterruptible power source for emergency lighting in an AC powered electrical system utilizes X-10 protocol transmitters and receivers for transmitting and receiving data signals over existing wiring to emergency wall switches interposed in the wirin... | 11/09/1999 |
| 5861718 | ARC lamp igniter apparatus and method An arc lamp igniter circuit (10) employs a resonant inverter circuit (16) to convert low-voltage DC to a relatively high-voltage, 80 kilohertz sinusoidal AC voltage that is rectified and voltage-doubled (42, 44, 46) to about 2,500 volts DC for repetitivel... | 01/19/1999 |
| 5838114 | Plural ferro-resonant power supplies for powering a magnetron where the aray lies in these power supplies being independent from each other and not utilizing any common components A power supply quickly restarts an electrodeless lamp which is temporarily turned off in an application using microwave radiation generated by a magnetron. When the electrodeless lamp operates in a full power mode, the power supply provides full power to ... | 11/17/1998 |
| 5825133 | Resonant inverter for hot cathode fluorescent lamps A fluorescent lamp drive circuit is disclosed. The fluorescent lamp drive circuit includes first filament drive circuitry coupled to the filaments of the lamp for driving the fluorescent lamp with a first waveform having sufficient amplitude such that gas... | 10/20/1998 |
| 5729095 | High frequency lighting apparatus having an intermediate potential applied to the trigger electrode to reduce leakage current A high frequency (HF) lighting apparatus includes a rare gas discharge lamp and a power supply. The lamp has an envelope having a rare gas therein. A pair of electrodes is provided in the envelope, and an external conductor is provided near the envelope. ... | 03/17/1998 |
| 5717293 | Strike enhancement circuit for a plasma generator A strike enhancement circuit for a dc power supply, which can be a switched half-bridge supply, creates a high voltage at high impedance to initiate a plasma in a plasma chamber or sputtering chamber. The strike circuit has a plurality of diode bridges th... | 02/10/1998 |
| 5714845 | Method and circuit arrangement for operating a high pressure gas discharge lamp A high pressure gas discharge lamp is operated with normal output by at least predominantly low frequency energy supplied from a conventional power supply unit, and is operated at lower than 25 percent of the normal output by at least predominantly high f... | 02/03/1998 |
| 5710487 | Ballast circuit for gaseous discharge lamps without inductive electrical components or filaments An improved energizing circuit for starting and regulating a gaseous discharge lamp. The circuit is 100% solid state and does not require the use of any inductive components or any filaments for its proper operation. The circuit is made up of several sub-... | 01/20/1998 |
| 5705896 | Control electronic ballast system using feedback A feedback control system for electronic ballast comprises a lamp, an electronic ballast, a multiplier, a time controller, a first adder-subtracter, a reference voltage generator, a second adder-subtracter, an error amplifier, a capacitor, a voltage contr... | 01/06/1998 |
| 5680016 | Transformerless electronic ballast for gaseous discharge lamps A transformerless ballast for a gaseous discharge lamp is disclosed. The ballast comprises: a rectifier; a filter for the rectifier output; a voltage divider for the filter output; an electronic gate modulating the filter output to power a lamp when the l... | 10/21/1997 |
| 5589739 | Hybrid ballast for high pressure discharge lamp A circuit for operating a discharge lamp includes input terminals for connection to a supply voltage source and a first apparatus coupled to the input terminals for generating a low-frequency alternating current from a supply voltage delivered by the supp... | 12/31/1996 |
| 5581160 | Method and apparatus for lighting an EL element An electroluminescence (EL) element lighting device for an EL element, includes a first circuit for self-oscillating to generate a first signal having a first frequency, and for gradually charging up said EL element in response to the first signal, and a ... | 12/03/1996 |
| 5471114 | Fail-safe uninterruptible lighting system A fail safe power supply system specially adapted for supplying power to devices such as lights. A battery is provided to supply power to the devices, and during normal operation, charge on the battery is maintained within selected levels by a charging co... | 11/28/1995 |
| 5418433 | Flashlight with hybrid battery and electronic control circuit A flashlight has a hybrid battery pack consisting of a primary-cell battery (ex: an Alkaline battery) and an auxiliary rechargeable battery of low internal resistance (ex: a Ni--Cad battery). Connected in circuit between the batteries and the flashlight's... | 05/23/1995 |
| 5367225 | High frequency luminous tube power supply having neon-bubble and mercury-migration suppression A high frequency power supply for neon and mercury luminous tubes including means for simultaneously suppressing bubbles formed in neon tubes and for minimizing migration of mercury commonly associated with the use of solid-state luminous tube power suppl... | 11/22/1994 |
| 5349269 | Power supply having dual inverters for electroluminescent lamps A power supply for an electroluminescent lamp includes a pair of inverters for alternately powering the EL lamp from a low voltage DC source. A first inverter is connected to a first electrode of the EL lamp and a transistor is connected between the first... | 09/20/1994 |
| 5332950 | Driver circuit for long luminescence life display device and method of driving such device A driver circuit for a display device, in which first and second clock pulse generator circuits generate first and second clock pulses to a gate circuit for allowing the first clock pulse to pass when the first and second clock pulses are a high level, an... | 07/26/1994 |
