| Prolific Technology Inc. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110221550 | CONTACTLESS SWITCH AND ASSOCIATED METHOD - A contactless switch provided by the present disclosure is coupled to a signal input device and receives a magnetic signal generated by a magnetic trigger mechanism. The contactless switch includes: a magnetic sensor, for sensing the magnetic signal and generating a corresponding trigger control signal; a controller, for generating a switch signal according to the trigger control signal; and a mode switch module, for processing the input signal to generate an output signal according to the switch signal. | 09-15-2011 |
| 20110179235 | DRIVING DEVICE AND METHOD OF ACCESSING DATA BY USING THE SAME - A driving device and a method of accessing data are provided. The driving device includes a bridge and a driver. The bridge includes a first controller. The driver includes a storage unit and a second controller. The first controller is for outputting a command according to an operating event. The second controller is for obtaining a corresponding data from the storage unit according to the command and uploading the data to the first controller. | 07-21-2011 |
| 20100235595 | DATA STORAGE SYSTEM AND BACKUP METHOD THEREOF - A data storage system and the backup method thereof are provided. The data storage system includes a storage device and a storage controller. The storage controller is coupled to the storage device and used for dividing the storage device into a primary data block and a backup data block and setting the data storage system to operate under one of a real time backup mode and a non-real time backup mode. Under the non-real time backup mode, the storage controller backups the data stored in the primary data block to the backup data block when the data storage system is idle. | 09-16-2010 |
| 20100202468 | BRIDGE, DATA COMPRESSING METHOD THEREOF AND COMPUTER SYSTEM APPLYING THE SAME - Provided is a bridge coupled between an external host and an external storage device. The bridge includes a first interface, an encoder, a memory device, a decoder and a second interface. The first interface is coupled to the external host and receives a first data from an external host. The encoder is coupled to the first interface and compresses the first data by undistorted compression for producing a second data. The memory device is coupled to the encoder and temporally stores the second data produced by the encoder. The decoder is coupled to the memory device and decompresses the second data stored in the memory device for producing a third data. The third data and the first data are substantially the same. The second interface is coupled between the decoder and the external storage device and outputs the third data transmitted from the decoder to the external storage device. | 08-12-2010 |
| 20100201552 | SELF-CALIBRATION CIRCUIT AND METHOD FOR CAPACITORS - A self-calibration circuit and method for capacitors are provided. A capacitor array is calibrated to approximate a reference capacitor according to an average parameter generated by calibrating the capacitor array multiple times. Since the capacitance of the compensation capacitor required to be connected to the target capacitor in parallel is determined according to the average parameter generated by performing the calibration multiple times, the error caused by a single calibration can be reduced, and meanwhile the calibration error caused by a reference voltage error or noise is reduced. | 08-12-2010 |
| 20100176775 | VOLTAGE REGULATOR - A voltage regulator includes a comparator, a first voltage output unit, a second voltage output unit, a third voltage output unit, a first switch and a second switch. The voltage regulator receives an operating voltage and a reference voltage generated by a reference voltage generator, and then outputs a corresponding output voltage. The voltage regulator of the present invention can provide an operation mode, a suspend mode and a standby mode and can be switched among these modes to provide corresponding current driving capacity for respective operation states. When in the operation mode, the voltage regulator can supply a great current. When in the suspend mode, the voltage regulator consumes less power. When in the standby mode, the voltage regulator consumes even less power. | 07-15-2010 |
| 20090189645 | FILTER AND FILTERING METHOD - A filter and a filtering method are provided. The filter includes a first compare voltage generation unit, a second compare voltage generation unit, a comparator and a first inverter. The first compare voltage generation unit generates a first compare voltage according to an input signal. The second compare voltage generation unit generates a second compare voltage. When the first compare voltage is not over the first reference voltage, the second compare voltage equals the first reference voltage. When the first compare voltage is over the first reference voltage, the second compare voltage equals the second reference voltage. The first reference voltage and the second reference voltage depend on a minimum pulse width. The comparator outputs a filtered signal according to the first compare voltage and the second compare voltage. The first inverter inverts a filtered signal to an output signal. | 07-30-2009 |
| 20090164877 | MEMO VOICE RECORDING/PLAYBACK METHOD AND DIGITAL PHOTO FRAME USING THE SAME - A memo voice recording/playback method and a digital photo frame using the method are provided. The method is suitable for a digital image playback apparatus. The digital image playback apparatus has memo voice recording function and memo voice playback function and includes a display unit for image displaying. The method includes: displaying an image; judging whether memo voice recording function of the digital image playback apparatus is enabled or not; and executing a memo voice recording procedure to edit the recorded memo voice into a memo voice file associated with the image if it is judged that the memo voice recording function is enabled. | 06-25-2009 |
| 20080303482 | Multi charging current control circuit and method thereof - A multi charging current control circuit including a voltage reference unit, a current limiting unit, a current detector and a current control unit is provided. The voltage reference unit provides many reference voltages. The current limiting unit selects a corresponding reference voltage from the reference voltages according to a charge mode signal and outputs a control signal according to the corresponding reference voltage. The current detector detects a first and a second charging current. The current control unit controls the first charging current and the second charging current according to the control signal. The current detector feedbacks the first charging current and the second charging current detected to the current control unit, such that the current control unit adjusts the first charging current or the second charging current to make the sum of the first charging current and the second charging current less than or equal to a constant value. | 12-11-2008 |
| 20080238349 | METHOD AND CIRCUIT FOR CONTROLLING MOTOR AND BRUSHLESS MOTOR SYSTEM USING THE SAME - A method and a circuit for controlling a motor and a brushless motor using the same are provided. The brushless motor includes three phase coils, wherein the first terminals of all the phase coils are coupled to a common node. The method includes following steps: among the above-mentioned three phase coils, when there is no current flowing through the first phase coil of the above-mentioned three phase coils and a current flows from the second terminal of the second coil to the second terminal of the third phase coil, detecting the voltage at the second terminal of the first phase coil to be a first specific voltage; detecting the voltage drop of a DC sensing resistor to be a second specific voltage; and utilizing the first specific voltage, the second specific voltage and the DC voltage supplied to the motor to estimate zero crossing points for controlling the motor. | 10-02-2008 |
