Patent application number | Description | Published |
20110012571 | LOAD DRIVING APPARATUS - A load driving apparatus is provided. The load driving apparatus is configured to output an electrical signal to a load. The load driving apparatus includes a driver and an average voltage/current detector. The driver receives an input voltage and a control signal. The driver tunes the electrical signal according to the control signal. The average voltage/current detector receives the electrical signal outputted to the load and generates the control signal by comparing the electrical signal and a reference signal. | 01-20-2011 |
20110037399 | DIMMER CIRCUIT OF LIGHT EMITTING DIODE AND ISOLATED VOLTAGE GENERATOR AND DIMMER METHOD THEREOF - An isolated configuration dimmer circuit of a light emitting diode (LED) applied to a conventional triac dimmer and a dimmer method are provided. When a dimmer phase angle of the triac dimmer is regulated, a second side winding of a transformer of the isolated configuration produces a pulse width corresponding to a modulated alternating current (AC) voltage, so as to regulate the pulse width of a driving signal output by the second side winding of the transformer. In addition, the dimmer circuit regulates the magnitude of a current flowing through the light emitting diode (LED) according to the pulse width corresponding to the modulated AC voltage. Accordingly, the dimmer circuit regulates the pulse width and the magnitude of the current flowing through the LED according to the dimmer phase angle of the triac dimmer. Therefore, a dimmer range of the LED can be increased. | 02-17-2011 |
20110101953 | Control Device and Switching Power Supply - A control device for a switching power supply includes an frequency-hopping oscillator for generating an oscillating signal and an indication signal, an SR flip flop for outputting a driving signal according to the oscillating signal and the indication signal, to control a primary winding of a transformer of the switching power supply, a comparator for comparing a current sense signal of the primary winding and a subtraction result, to output the comparison result to the SR flip flop, a ramp generator for generating ramp signals with time-varying slopes, and a subtraction unit for performing a subtraction operation on a feedback signal and the ramp signals, to generate the subtraction result for the comparator. | 05-05-2011 |
20110170324 | Power Factor Correction Device - A power factor correction device includes a rectifier for converting an AC input voltage into a DC input voltage, an output module for generating and outputting a DC output voltage, an intermediate inductor coupled between the rectifier and the output module, a power switch for controlling an inductor current of the intermediate inductor and generating a source voltage, a reset module for generating a reset instruction according to the DC input voltage, the DC output voltage and the source voltage, an SR flip-flop for outputting a latch result according to a set instruction and the reset instruction, and a set module for generating the set instruction in response to variation of the intermediate inductor or variation of the latch result. | 07-14-2011 |
20110181515 | Control system and method for controlling information processing devices - A control system and a method for controlling information process devices is disclosed using an additional input device with an application installed inside so that the plurality of information processing devices is controlled by a set of mouse and keyboard or the input device. The control system comprises: a mouse keyboard controller connects with a mouse, a keyboard, and an input device, wherein an application program is installed in the input device and drives the input device to communicate with the mouse keyboard controller and the plurality of information processing devices is controlled by the mouse keyboard controller. | 07-28-2011 |
20110273113 | Method and Device for Driving Light-Emitting Diode - A method for driving a light-emitting diode based upon an AC input voltage includes receiving and full-wave rectifying the AC input voltage to generate a full-wave rectified input voltage, generating a pulse width modulation signal according to the full-wave rectified input voltage and a luminance signal, and generating a driving voltage according to the pulse width modulation signal and the full-wave rectified input voltage, and applying the driving voltage to the light-emitting diode. | 11-10-2011 |
20120013312 | Power Control Device and Method thereof - A power control device for tracking a maximum power point (MPP) of a power generator comprises a sensing unit for generating a sensed voltage value and a sensed power value according to a cross voltage and an output current of the power generator; a sample and hold unit for sampling and holding the sensed voltage value and the sensed power value; a comparison and determination unit for generating a determination result according to the sensed voltage value and the sensed power value of a previous time point outputted by the sample and hold unit and the sensed voltage value and the sensed power value of a current time point outputted by the sensing unit; and a voltage converter for adjusting the cross voltage of the power generator to make the power generator reach to the maximum power point according to the determination result. | 01-19-2012 |
20130321036 | GATE DRIVING APPARATUS - A gate driving apparatus is disclosed. The gate driving apparatus includes a first gate driving chip and N second gate driving chips, wherein N is positive integer. The first gate driving chip has a first input pin and a first current output pin. The first gate driving chip receives a reference electrical signal by the first input pin, and generates a reference current according to the reference electrical signal. The first current output pin is used for outputting the reference current. Each of the second gate driving chips has a current input pin for receiving the reference current and a second current output pin for outputting the reference current. The first gate driving chip and the second gate driving chips generate at least a first output signal and at least N second output signals according to the reference current. | 12-05-2013 |
20140210521 | GATE OR SOURCE DRIVING APPARATUS - A gate/source driving apparatus includes a first gate/source driving chip and a second gate/source driving chip. The first gate/source driving chip includes a plurality of first charge pump circuits, each of which has a voltage input end, a voltage output end, a first capacitor end, and a second capacitor end. The second gate/source driving chip includes a plurality of second charge pump circuits, each of which also has a voltage input end, a voltage output end, a first capacitor end, and a second capacitor end. The voltage output end of at least one of the first charge pump circuits is coupled to the voltage input end of at least one of the second charge pump circuits. | 07-31-2014 |
Patent application number | Description | Published |
20100052988 | Radio Frequency Positioning System and Method - A radio frequency (RF) positioning system for positioning an RF device on a surface is provided. The RF positioning system utilizes the property of the RF device generating a response signal upon receiving an RF signal to perform positioning. The RF positioning system includes an antenna set, a switch unit, an RF module and micro-controller unit (MCU). The antenna set has a plurality of antennas in different sizes. The RF module is coupled to the switch unit. The MCU, coupled to the switch unit and the RF module, controls the switch unit to select one antenna from the antenna set and controls the RF module to generate the RF signal. The MCU further estimates a distance between the RF device and the RF positioning system according to whether the RF positioning system receives the response signal through the selected antenna. | 03-04-2010 |
20100164740 | Automatic Lock and Automatic Unlock Method for Computer System and Computer System Thereof - An automatic lock and automatic unlock method for a computer system and the associated computer system are provided. The method includes steps of detecting whether a user is in a predetermined range when a computer system is in an unlock status and recording a duration during which the user is not in the predetermined range, controlling the computer system to enter a lock status when the duration is greater than a predetermined time, determining whether the user has an effective authority when the computer system is in the lock status and the user is detected in the predetermined range, and controlling the computer system to enter the unlock status when the user has the effective authority. | 07-01-2010 |
20100176934 | RADIO FREQUENCY CHARGING SYSTEM - A radio frequency (RF) charging system is capable of charging an RF device on a display panel to increase charging efficiency. The RF device generates a response signal upon receiving an RF signal. The RF charging system includes an antenna set having a plurality of antennas, a switch unit, an RF module and a microcontroller unit (MCU). The MCU controls the switch unit to select one antenna from the antenna set. The antenna is able to receive the response signal and is used for transmitting the RF signal, thereby charging the RF device. | 07-15-2010 |
Patent application number | Description | Published |
20090134903 | LOOP-BACK TESTING METHOD AND APPARATUS FOR IC - A test system for testing operability of integrated circuits includes: a first IC, for modulating a first signal to generate a first modulated signal and transmitting the first modulated signal, and for receiving a second modulated signal and demodulating the second modulated signal to generate a second signal; a first loop antenna, coupled to the first IC, for receiving the first modulated signal and sending the first modulated signal back to the first IC as the second modulated signal; and a tester circuit coupled to the first IC, for generating the first signal to the first IC, receiving the second signal from the first IC, and comparing the first signal and the second signal to determine the operability of the first IC. | 05-28-2009 |
20090212917 | WIRELESS COMMUNICATION APPARATUS AND METHOD THEREOF - A wireless communication method utilizing a wireless communication apparatus is provided. The method includes: providing an antenna unit being used by both a first wireless communication circuit and a second wireless communication circuit, using the first wireless communication circuit for RFID communication via the antenna unit in a first mode, and utilizing the second wireless communication circuit for RFID communication via the antenna unit in a second mode. | 08-27-2009 |
20090240965 | ELECTRONIC APPARATUS AND AUTO WAKE-UP CIRCUIT THEREOF - The present invention relates to an electronic apparatus and an auto wake-up circuit thereof. The electronic apparatus comprises a main module for performing a main function of the electronic apparatus and generating a first control signal when the electronic apparatus enters a sleep mode; an auxiliary module, coupled to the main module, for performing an auxiliary function of the electronic apparatus and generating a second control signal; and a wake-up circuit module, coupled to the main module and the auxiliary module, for generating a third control signal based on the first control signal and the second control signal. The auxiliary module maintains the auxiliary function based on the third control signal while the electronic apparatus is in the sleep mode. | 09-24-2009 |