Class / Patent application number | Description | Number of patent applications / Date published |
315207000 | Discharge device and/or rectifier in shunt to the load device | 8 |
20080211417 | Stepless Dimming Fluorescent Lamp and Ballast Thereof - A fluorescent lamp adapted for effecting stepless dimming with a regular SCR dimmer, comprising a filter and rectifier circuit ( | 09-04-2008 |
20080278084 | LED LAMP SET APPARATUS - The present invention relates to a LED lamp set apparatus, comprises a gas discharge tube and a LED connected in series, the gas discharge tube is a neon tube, an argon tube, a helium tube or a krypton tube, or a gas tube in which the other inert gases is filled or is filled with a mixture of inert gases. When operating the LED lamp set apparatus provided by the present invention, a public AC power source can be directly input to the LED lamp set apparatus for lighting the LED, needless of an inverter; for protecting the LED, the LED lamp set apparatus can be connected in series with a current-limiting resistance, or the public AC power source can be input to a rectifying diode or a bridge rectifier for processing a rectifying operation and then input to the LED lamp set apparatus; a plurality of the LED lamp set apparatuses can be connected in parallel; or the LED lamp set apparatus can be integratedly-packaged and is inserted to a connector. | 11-13-2008 |
20110285302 | LED Driver for Driving LED Lighting Device at High Frequency - A driver device for driving an LED lighting device includes at least one power switch adapted to operate at a switching frequency of greater than 500 KHz and adapted to control the driving current provided to the LED lighting device. Operating the power switch at such a high frequency allows a substantial reduction in passive devices such as inductors and capacitors. | 11-24-2011 |
20120161657 | Passive Anti-Arcing Protection Device for Fluorescent Lamp Ballast - A passive anti-arcing protection components for electronic ballasts of fluorescent lamps. This protection component is a bridge-rectifier-resistor-capacitor network, containing at least a diode, a resistor, and a capacitor. The component's circuitry is electrically connected to the ballast at the lamp side, acting as a low-resistance redirection path for any sudden change in energy. When an arcing condition is about to occur, this protection circuitry absorbs the spark energy, ceasing the arcing condition. | 06-28-2012 |
20120306397 | Light-Emitting Module and Lighting Apparatus - A light-emitting module may be configured to have improved light emission efficiency and light distribution characteristics. A light-emitting module may include a substrate having a front surface side as a component mounting surface and a rear surface side as a flat heat dissipating surface, a plurality of light-emitting elements arranged in a manner protruding at a central portion of the component mounting surface of the substrate. The light-emitting elements may radiate light at least in an upper surface direction and in a direction along the component mounting surface. The module may further include one or more lighting circuit components electrically connected to the light emitting elements by a wiring pattern arranged on the substrate and which is arranged closer to the peripheral edge side of the substrate than the light emitting elements on the component mounting surface of the substrate, and a connector for power supply connection. | 12-06-2012 |
20130026937 | LIGHTING DEVICE AND ILLUMINATION APPARATUS USING SAME - A light emitting element lighting device includes: a rectifying unit which rectifies an AC voltage; a smoothing unit which smoothes a ripple voltage from the rectifying unit; a power supply unit having a switching element; and a control unit which controls on/off of the switching element. Further, the smoothing unit servers as a partial smoothing circuit for partially smoothing a low voltage period of the ripple voltage outputted from the rectifying unit. The power supply unit supplies a lighting power to a light source unit including one or more light emitting elements. The control unit controls a switching frequency of the switching element to decrease as the output voltage of the smoothing unit decreases. | 01-31-2013 |
20140049176 | POWER DEVICE - An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current power signal. The frequency of the alternating current power signal is responsive to the control signal. The frequency dependent reactive device is electrically coupled to the pair of transistors for receiving the alternating current power signal and producing an output power signal. The frequency dependent reactive device is chosen to achieve a desired voltage of the output power signal relative to the frequency of the alternating current power signal. The control element senses an actual voltage of the direct current power signal and modifies the control signal delivered to achieve the desired voltage of the direct current power signal. | 02-20-2014 |
20150305128 | PROTECTING CIRCUIT FOR ARC DISCHARGE LAMP - Provided is a method to detect an arcing condition in an arc discharge lamp ballasts is disclosed. An AC current signal flows from the lamp load to ground via at least one ring core. The ring core is provided for detecting an arcing condition in AC current signal and the ballast circuit by detecting a current spike along the ring core. When there is a current spike in the primary core, created by the arcing condition, a proportional increase in voltage within a control signal occurs on the secondary core. A rectifier circuit is used for conditioning the increase in voltage within the control signal. A control circuit, responsive to the increase in voltage within the control signal, dynamically adjusts the operating frequency of a resonant inverter so that the arcing condition is extinguished. | 10-22-2015 |