| Patent application number | Description | Published |
|---|
| 20100119050 | AUTO PROVISION SYSTEM AND METHOD FOR CUSTOMER PREMISES EQUIPMENT - An auto provision system and method for a customer premises equipment (CPE) include: connecting a CPE to a provision platform through a network; authenticating the CPE by the provision platform and generating and transmitting a corresponding setting file to the CPE by the provision platform; and the CPE updating the configuration thereof by using the received setting file, thereby saving manual costs for ISPs (Internet Service Providers), ensuring ease of use, and enhancing information security. | 05-13-2010 |
| 20100148681 | DRIVING CIRCUIT WITH CONTINUOUS DIMMING FUNCTION FOR DRIVING LIGHT SOURCES - A driving circuit for controlling power of a light source includes a power converter coupled to a power source and the light source, and a dimming controller coupled to the power converter. The power converter can receive power from the power source and provide a regulated power to the light source. The power converter includes a control switch coupled in series with the light source. The dimming controller can monitor a power switch coupled between the power source and the driving circuit, and receive a dimming request signal and a dimming termination signal. The dimming request signal can indicate a first set of operations of the power switch. The dimming termination signal can indicate a second set of operations of the power switch. The dimming controller can continuously adjust the regulated power from the power converter by controlling the control switch if the dimming request signal is received, and can stop adjusting the regulated power from the power converter if the dimming termination signal is received. | 06-17-2010 |
| 20100148691 | Driving circuit with dimming controller for driving light sources - There is provided a driving circuit for controlling power of a light source. The driving circuit includes a power converter and a dimming controller. The power converter is coupled between a power source and the light source, and can receive power from the power source and provide a regulated power to the light source. The dimming controller is coupled to the power converter, and can receive a switch monitoring signal. The switch monitoring signal can indicate an operation of a power switch coupled between the power source and the driving circuit. The dimming controller is further operable for adjusting the regulated power from the power converter by controlling a switch coupled in series with the light source according to the switch monitoring signal. | 06-17-2010 |
| 20100219766 | CIRCUITS AND METHODS FOR DRIVING LIGHT SOURCES - A dimming controller for controlling power of a light source has a monitoring terminal, a dimming terminal, and a control terminal. The monitoring terminal is operable for receiving a current monitoring signal indicating a current flowing through the light source. The dimming terminal is operable for receiving a ramp signal. The voltage of the ramp signal increases if a power switch coupled between a power source and the light source is turned on. The control terminal is operable for providing a control signal to control a control switch coupled in series with the light source based on the current monitoring signal and the ramp signal. An average current of the light source increases as the ramp signal increases until the average current reaches a predetermined level. | 09-02-2010 |
| 20100289474 | CONTROLLERS FOR CONTROLLING POWER CONVERTERS - In one embodiment, a controller includes a first comparator, a second comparator and a control unit coupled to the first and second comparators. The first comparator is operable for comparing a first sense signal indicative of an output current flowing through an energy storage component of the power converter with a first threshold, and for generating a first comparison signal. The second comparator is operable for comparing a second sense signal indicative of the output current with a second threshold and for generating a second comparison signal. The control unit is operable for turning a switch of the power convertor on and off according to the first and second comparison signals. The energy storage component is coupled to a power source for storing energy from the power source if the switch is turned on, and is decoupled from the power source for releasing stored energy to a load if the switch is turned off. | 11-18-2010 |
| 20100320934 | CIRCUITS AND METHODS FOR DRIVING A LOAD WITH POWER FACTOR CORRECTION FUNCTION - A circuit for driving a load includes a power line, converter circuitry, and a controller. The power line is operable for providing an input current and an input voltage. The converter circuitry coupled to the power line is operable for converting the input voltage to a regulated voltage to drive the load, and for providing a current detection signal indicating whether a converter current flowing through the converter circuitry drops to a predetermined level. The controller coupled to the converter circuitry is operable for correcting a power factor of the circuit based on the current detection signal and the input voltage such that a waveform of the input current follows a waveform of the input voltage. | 12-23-2010 |
| 20110062882 | SYSTEMS AND METHODS FOR DRIVING A LIGHT SOURCE - A circuit for driving a light source includes a voltage converter, a switch and a controller. The voltage converter converts an AC input voltage signal to a first rectified AC voltage signal. The voltage converter further generates an average signal proportional to an average voltage level of the first rectified AC voltage signal. The switch is coupled to the light source in series. The controller coupled to the voltage converter and the switch compares the first rectified AC voltage signal with the average signal to generate a pulse signal. The controller further generates a dimming control signal based on the pulse signal to control the switch thereby controlling dimming of the light source. | 03-17-2011 |
| 20110074308 | CONTROLLER FOR CONTROLLING DIMMING OF A LIGHT SOURCE - A controller for controlling dimming of a light source includes a detector, a dimming signal generator coupled to the detector, and a pulse generator coupled to the dimming signal generator. The detector can detect a startup phase of a burst dimming cycle of the light source and can generate a triggering signal when the startup phase ends. The burst dimming cycle includes an ON period and an OFF period. The dimming signal generator can trigger the ON period of the burst dimming cycle for a predetermined duration in response to the triggering signal. The pulse generator operable for generating a pulse signal to control a current through the light source can be enabled during the ON period and disabled during the OFF period. | 03-31-2011 |
| 20110080119 | CIRCUITS AND METHODS FOR DRIVING LIGHT SOURCES - A circuit for driving a light source, e.g., an LED light source, includes a converter, a sensor, and a controller. The converter converts an input voltage to an output voltage across the LED light source based upon a driving signal. A duty cycle of the driving signal determines an average current flowing through the LED light source. The sensor is selectively coupled to and decoupled from the converter based upon the driving signal. The sensor generates a sense voltage indicative of a current flowing through the LED light source when the sensor is coupled to the converter. The controller is coupled to the converter and sensor. The controller compares the sense voltage to a reference voltage indicative of a predetermined average current through the LED light source to generate a compensation signal and generates the driving signal based upon the compensation signal. The duty cycle of the driving signal is adjusted based upon the compensation signal to adjust the average current flowing through the LED light source to the predetermined average current. | 04-07-2011 |
| 20110133645 | CIRCUITS AND METHODS FOR POWERING LIGHT SOURCE WITH BALANCED CURRENTS - A light source driving circuit for powering multiple light sources in a vehicle includes multiple current limiters and a balance controller. The current limiters are coupled to the light sources for adjusting currents of the light sources respectively. The balance controller coupled to the current limiters can control the current limiters such that a current flowing through each of the light sources is substantially the same as a first target current. Moreover, the balance controller can control the current limiters in response to a brake of the vehicle such that a current flowing through each of the light sources is substantially the same as a second target current. | 06-09-2011 |
| 20110133662 | CIRCUITS AND METHODS FOR DRIVING LIGHT SOURCES - A driving circuit includes a first inductor coupled in series with a light source for providing power to the light source. A controller coupled to the first inductor can control a switch coupled to the first inductor, thereby controlling a current flowing through the first inductor. A current sensor coupled to the first inductor can provide a first signal indicative of the current flowing through the first inductor, regardless of whether the switch is on or off. The switch is controlled according to the first signal. A second inductor magnetically coupled to the first inductor is also electrically coupled to the first inductor via a common node between the switch and the first inductor for providing a reference ground for the controller. The reference ground is different from the ground of the driving circuit. | 06-09-2011 |
| 20110140616 | CIRCUITS AND METHODS FOR CONTROLLING POWER OF LIGHT SOURCES - A driving circuit for driving a light source includes a power converter, a controller and a voltage-controlled current source. The power converter is coupled to the light source, and receives an input voltage from a power source and provides an output voltage to the light source. The power converter includes a switch coupled in series with the light source. The controller is coupled to the power converter and controls a power of the light source by controlling the switch. The voltage-controlled current source is coupled to the controller and provides a first current. The controller controls the switch based on the first current. | 06-16-2011 |
| 20110140619 | DIFFERENTIAL DRIVING CIRCUIT FOR POWERING A LIGHT SOURCE - A differential driving circuit for powering a light source is disclosed. The differential driving circuit includes a first set of switches and a second set of switches. A first current from a power source flows through the first set of switches to charge a first energy storage element when the first set of switches are turned on. A second current from the first energy storage element flows through the second set of switches to power the light source when the second set of switches are turned on. The differential driving circuit further includes a second energy storage element coupled to the light source in parallel and for providing a differential voltage to the light source. | 06-16-2011 |
| 20110140620 | CIRCUITS AND METHODS FOR CONTROLLING DIMMING OF A LIGHT SOURCE - A controller for controlling dimming of a light source includes a detection pin, an input signal pin, and a monitoring pin. The detection pin is operable for monitoring a rectified voltage and for detecting whether the rectified voltage comes from a TRIAC dimmer or an on/off switch dimmer. The input signal pin is operable for receiving an input signal indicative of the rectified voltage and the controller controls dimming of the light source according to the input signal if the rectified voltage comes from a TRIAC dimmer. The monitoring pin is operable for receiving a monitoring signal indicating an operation of the on/off switch dimmer and the controller controls dimming of the light source according to the monitoring signal if the rectified voltage comes from an on/off switch dimmer. | 06-16-2011 |
| 20110140621 | CIRCUITS AND METHODS FOR CONTROLLING A LIGHT SOURCE - A driving circuit for controlling a light source includes a frequency controller and a switch module. The frequency controller is operable for receiving a first dimming signal for controlling the light source to achieve a predetermined brightness, and for generating a second dimming signal having a frequency out of one or more predetermined ranges according to the first dimming signal when the frequency of the first dimming signal is within the predetermined ranges. The switch module coupled to the frequency controller is operable for switching on and off alternately to achieve the predetermined brightness of the light source according to the second dimming signal when the frequency of the first dimming signal is within the predetermined ranges and according to the first dimming signal when the frequency of the first dimming signal is out of the predetermined ranges. | 06-16-2011 |
