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...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 7315136 | Protection apparatus and multi-lamp driving system using the same A multi-lamp driving system includes a driving apparatus and a current balancer having detection nodes. The protection apparatus includes at least a detection unit and a determining unit. The detection unit includes first impedance devices and a second impedance dev... | 01/01/2008 |
| 7315134 | Power supply for a high voltage device Control of an output pulse width by a PWM control circuit is stopped and the initial pulse string having a fixed pulse width is outputted in order to obtain a power supply voltage rise within a predetermined time period at the time of turning on the power. During no... | 01/01/2008 |
| 7315095 | Voltage regulating apparatus supplying a drive voltage to a plurality of loads In a soft start period after power-on, a voltage regulating apparatus checks LED by LED to determine whether the LED is mounted on a position to receive a drive voltage. After the soft start period, the voltage regulating apparatus monitors the driving status of eac... | 01/01/2008 |
| 7315464 | Drive system and AC conversion device A drive system with small power loss in power conversion is provided. The drive system has an AC conversion device for converting commercial AC power from a commercial AC power supply and a DC conversion device. An AC power supply path for supplying power to dischar... | 01/01/2008 |
| 7315138 | Cold cathode fluorescent discharge lamp apparatus and operating method for same A discharge lamp operating device includes a voltage application unit that applies to a discharge lamp an alternating-current (AC) voltage for operation of the discharge lamp, and a frequency setting unit that sets a frequency of the AC voltage to a first frequency ... | 01/01/2008 |
| 7312586 | Ballast power supply A high frequency ballast power supply for a high intensity discharge lamp includes a variable frequency voltage generating circuit for producing a regulated cyclical voltage. After ignition of the lamp, the variable frequency voltage generating circuit operates to v... | 12/25/2007 |
| 7312582 | Electronic ballast An electronic ballast for driving at least one lamp comprising a rectifying circuit operatively connectable to an AC line; a current drawing circuit connected across said rectifying circuit; and an inverter circuit connected to said rectifying circuit that supplies ... | 12/25/2007 |
| 7312780 | Fluorescent lamp driver system A lamp driver system is provided that facilitates improved efficiency and brightness control for an optical display system. The lamp driver system provides this improved efficiency and brightness control through the precise control of the plasma in the lamp. The lam... | 12/25/2007 |
| 7312581 | Circuitry and methods for improving the performance of a light emitting element Light emitting elements with preselected or adjustable impedance characteristics are provided. Embodiments using a preselected impedance characteristic obtain significant performance benefits compared to the prior art. Embodiments having an adjustable impedance may ... | 12/25/2007 |
| 7312587 | Control device for high intensity discharge bulb and method of controlling high intensity discharge bulb Two types of rectangular waves having different numbers of driving pulses are applied to the HID bulb. By changing the combination of these two different types of rectangular waves to be supplied , the driving energy of the HID bulb is increased or decreased, thereb... | 12/25/2007 |
| 7312585 | Remote control of electronic light ballast and other devices An electronic ballast system controls one or more ballasts of HID or fluorescent lamps, which are controlled in an “on/off” manner by a ultra low power controller that is isolated for a primary power circuit or derives its very low switch power from the ballast ... | 12/25/2007 |
| 7312589 | Driver control circuit and method for cold cathode fluorescent lamp A driver control circuit and method for a cold cathode fluorescent lamp (CCFL), that the driver control circuit comprises: at least a comparator; at least an input/output port, at least an analog-to-digital converter; at least two programmable pulse generators (PPGs... | 12/25/2007 |
| 7309963 | Smoothing circuit for improving EMC The present invention relates to an electronic ballast for discharge lamps, for example low-pressure discharge lamps, having a converter having a switching element and a two-part lamp inductor which is connected upstream and downstream of the discharge lamp. An elec... | 12/18/2007 |
| 7310214 | Inductive output tube (IOT) control circuit A power supply for an RF transmitting tube while protecting the tube from a high voltage arc event. The supply includes a rectifier circuit configured to be connected to an AC voltage supply and having an output circuit that supplies a DC voltage to a load including... | 12/18/2007 |
| 7309960 | Vehicular lamp with current controlling unit There is provided a vehicular lamp that can inform walkers or drivers in the other vehicles of the existence of the moving vehicle even where the circumference of the vehicle is bright by emitting a light amount larger than that of normal times when the circumferenc... | 12/18/2007 |
| 7309962 | Protection control circuit for discharge lamps A protection control circuit for discharge lamps aims to control protection signals input to a load at a rear end of a high voltage output zone that are generated during abnormal conditions. The high voltage output zone has a control unit and a driving unit, and a s... | 12/18/2007 |
| 7307390 | Primary side constant output voltage controller A lower-cost and more precise control methodology of regulating the output voltage of a Flyback converter from the primary side is provided, which works accurately in either continuous voltage mode (CCM) or discontinuous mode (DCM). The methodology can be applied to... | 12/11/2007 |
| 7304438 | Method and apparatus for preventing instabilities in radio-frequency plasma processing A method and apparatus for controlling a power supply to prevent instabilities due to dynamic loads in RF plasma processing systems, operating at frequencies of from 1 MHz and up, uses a feedforward type of control loop to tightly regulate the power supplied to the ... | 12/04/2007 |
| 7304442 | Three component protective head gear powered by a rechargeable battery A three-component, protective headgear or helmet, and circuits therefor is provided with a battery-powered LED head lamp, which may be used by construction workers, search and rescue persons, cyclists, police, fireman, and the like. The battery may be replaceable or... | 12/04/2007 |
| 7305312 | Method and apparatus for recording a real time signal A system, method, and apparatus for obtaining a record of logic level transitions within a signal, and for accurately determining a voltage-time pair exhibited by the signal. To achieve these ends, a front-end device may be mated to a real-time sampling system, such... | 12/04/2007 |
| 7304436 | Generator for sustaining pulse of plasma display panel It is disclosed that there is a sustaining pulse generator of a plasma display panel capable of simplifying a circuit configuration thereof. A sustaining pulse generator of a plasma display panel according to an embodiment of the present invention includes a ... | 12/04/2007 |
| 7304439 | Phase-controlled dimmable electronic ballasts for fluorescent lamps with very wide dimming range In order to achieving wide dimming range for compact and tubular fluorescent lamps, two novel control approaches are proposed. (i) Novel techniques for suppressing oscillatory effects in the Triac circuit so as to maintain stable Triac operation over a wide firing a... | 12/04/2007 |
| 7301447 | LED turn signal and error detecting method A motor vehicle turn signal and a method for detecting an error in the turn signal are provided. The turn signal comprises a plurality of LEDs arranged in parallel banks and receiving current from a power source. A detector coupled to each of the parallel banks prov... | 11/27/2007 |
| 7301522 | Apparatus for controlling LCD backlight in mobile station There is provided an apparatus for controlling an LCD backlight in a mobile station to perform the operation of the mobile station in a dimming mode more effectively, and extend the maximum allowable operation time of the mobile station, the apparatus including a ba... | 11/27/2007 |
| 7301288 | LED buck regulator control IC A high speed buck control IC for constant LED current regulation. A continuous mode hysteretically controlled buck regulator monitors the load current using an accurate on-chip band-gap voltage reference. This style of current regulation allows the designer to dispe... | 11/27/2007 |
| 7301289 | Discharge lamp lighting control device The present discharge lamp lighting device is capable of rapidly breaking or restoring a lamp current or of rapidly reducing or restoring the lamp current. A discharge lamp lighting device, comprises a power supply circuit which supplies power to a discharge lamp, a... | 11/27/2007 |
| 7301290 | Brightness control device of light bulb module A brightness control device for a light bulb module utilizes a microcontroller equipped with a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit to maintain an even luminance of each light bulb in the light bulb m... | 11/27/2007 |
| 7301291 | Power controller having current limited RMS regulated output A power controller converts a line voltage to an RMS load voltage for a lamp, and includes a switch and a microcontroller that operates the switch to define the RMS load voltage. The microcontroller senses a load voltage of the lamp, compares the sensed load voltage... | 11/27/2007 |
| 7298095 | Discharge lamp ballast apparatus A primary side current value to be shunted from a DC power source (1) to the primary side of a DC power circuit (2) is detected by a primary side current detection resistor (5), and an output current value to be shunted to an inverter curcuit ( | 11/20/2007 |
| 7298096 | Circuit and method for sensing open-circuit lamp of a backlight unit and display device with circuit for sensing open-circuit lamp of backlight unit A circuit for sensing an open-circuit lamp is provided. The circuit includes a reference voltage output unit, a voltage sensor, and a comparator. The reference voltage output unit provides a reference voltage. The voltage sensor detects a sensed voltage correspondin... | 11/20/2007 |
| 7298097 | Driver system and method with multi-function protection for cold-cathode fluorescent lamp and external-electrode fluorescent lamp System and method for driving a cold-cathode fluorescent lamp. The system includes a control subsystem configured to generate one or more control signals, and a power supply subsystem configured to receive the one or more control signals and a DC input voltage, conv... | 11/20/2007 |
| 7298098 | Intellectual lamp unit able to be installed on a conventional lamp socket controlled by a wall switch An intellectual lamp unit able to be installed on a conventional lamp socket controlled by a wall switch includes a bypass connected in parallel with a wall switch and provided with a resistance or a diode for producing potential difference or power phase difference... | 11/20/2007 |
| 7294974 | Fixed operating frequency inverter for cold cathode fluorescent lamp having strike frequency adjusted by voltage to current phase relationship A method of driving a lamp that uses a DC to AC inverter that is connected to a primary winding of a transformer is disclosed. The inverter frequency is variable, and in one embodiment, may be controlled by a voltage controlled oscillator. Circuitry is included that... | 11/13/2007 |
| 7293897 | Integrated fluorescent lamp device An integrated fluorescent lamp device for use with a lamp fixture including a lamp socket configured to removably receive a portion of the integrated fluorescent lamp device therein to selectively support the integrated fluorescent lamp device thereon, the integrate... | 11/13/2007 |
| 7294972 | Feedback circuit for push-pull inverters A feedback circuit for push-pull inverters aims to improve the existing push-pull inverters that provide input electricity to a discharge lamp at a phase difference of 180 degrees without feedback electricity to regulate frequency signals and cannot effectively cont... | 11/13/2007 |
| 7294979 | Light source module with temperature sensor A light source module includes a lamp assembly, at least one temperature sensor for monitoring a temperature of the lamp assembly, and a processor coupled to the temperature sensor and the lamp assembly, the processor being configured to operate the lamp assembly at... | 11/13/2007 |
| 7294975 | Method for controlling an inverter under altering voltage A method for controlling an inverter under altering voltage aims to change the electric conductive interval of the electric conductive cycle of the inverter corresponding to alteration of an input voltage so that the dimming duty cycle, electric conductive cycle and... | 11/13/2007 |
| 7294976 | Split power supply subsystem with isolated voltage supplies to satisfy a predetermined power limit A power subsystem including a mechanism for satisfying a predetermined power limit in a computer system. The power subsystem may include a split power supply and a voltage regulator. The split power supply may include at least a first voltage supply line and a secon... | 11/13/2007 |
| 7295176 | LED driver with constant current offset unit A light emitting diode (LED) driver to drive an LED, including a current adjusting unit to adjust magnitude of a current flowing on the LED by supplying power from a power supply device to the LED and cutting off the power. A modulation control unit is provided to m... | 11/13/2007 |
| 7292221 | Apparatus and method for controlling inverter pulse width modulation frequency in LCD in portable computer Apparatus and methods according to embodiments of the present invention can control an inverter pulse width modulation (PWM) frequency of a liquid crystal display (LCD) in a portable computer or the like. Noise and/or interference caused by a system environment can ... | 11/06/2007 |
