Patent application number | Description | Published |
20140035474 | HIGH EFFICIENCY LED DRIVER CHIP AND DRIVER CIRCUIT THEREOF - Disclosed is a high-efficiency LED driver chip and a driver circuit of the chip, and the driver chip includes a detection unit, a comparison unit and a correction unit. The LED detection unit detects the operating current of the LED driver circuit by an external sensing resistor and an internal current mirror to output a setup signal, and the comparison unit detects the driving current of at least one LED by an external comparing resistor to output an initialization signal, so that the correction unit can output a correction signal according to the setup signal and the initialization signal to reduce the power loss of the circuit while maintaining the driving current constant, so as to improve the illumination quality and the service life of the LED. | 02-06-2014 |
20140292229 | ELECTROMAGNETIC COUPLING MULTI-OUTPUT CONTROL CIRCUIT - Disclosed is an electromagnetic coupling multi-output control circuit having a detection unit, a switching unit and a coupling unit, and the coupling unit is coupled to a side of a transformer of a power driving device to sense and produce a second driving voltage, such that the transformer has a multi-output function. The switching unit is provided for receiving and outputting the second driving voltage to a second driving load, and the detection unit is provided for detecting the second driving voltage to produce a detection value, so that the switching unit analyzes the detection value and switches outputting a frequency of the second driving voltage to stabilize the voltage value of the second driving voltage, so as to flexibly increase the number of output voltages of the power driving device while lowering the cost and expand the scope of applicability. | 10-02-2014 |
20140333215 | MULTI-SEGMENT LED DRIVING CIRCUIT - Disclosed is a multi-segment LED driving circuit used in an AC operating mode for outputting a drive current to drive a plurality of serially connected LED strings. The LED driving circuit includes at least one detection part, at least one comparison part and at least one adjusting part. The detection part detects an input voltage and an output voltage at both ends of each string and its next string to form a detected value provided for the comparison part to compare the detected value with a reference value to turn on or off the adjusting part so as to control the strings through which the drive current passes and then sequentially drives the strings to emit light. The LED driving circuit can adjust the load of the circuit immediately based on the change of voltage value of the AC power to ensure the stability of the drive current. | 11-13-2014 |
Patent application number | Description | Published |
20120306803 | APPARATUS AND METHOD FOR PROTECTING TOUCH PANEL DEVICE FROM NOISE INTERFERENCE - A protection circuit for a touch panel device includes a detection block and a protection block. The detection block is arranged for detecting occurrence of noise interference that affects touch event detection of the touch panel device, and asserting a protection signal when occurrence of the noise interference is detected. The protection block is arranged for enabling a protection mechanism for protecting the touch panel device from the noise interference when triggered by the asserted protection signal. Besides, a protection method for a touch panel device includes: detecting occurrence of noise interference that affects touch event detection of the touch panel device; and enabling a protection mechanism for protecting the touch panel device from the noise interference when occurrence of the noise interference is detected. | 12-06-2012 |
20130285943 | APPARATUS AND METHOD FOR EXECUTING TOUCH CONTROLLER FIRMWARE DOWNLOADED FROM EXTERNAL HOST TO CONTROL TOUCH PANEL - An exemplary touch controller chip includes a volatile storage device, an interface unit and a control unit. The interface unit is arranged for receiving touch controller firmware outside the touch controller chip, and storing the received touch controller firmware into the volatile storage device. The control unit is arranged for executing the touch controller firmware stored in the volatile storage device to control a touch panel. In addition, an exemplary electronic device includes a touch controller chip and a host, wherein the touch controller chip has no non-volatile storage device used for storing touch controller firmware, and the host is arranged for transmitting the touch controller firmware to the touch controller chip. | 10-31-2013 |
20130285976 | METHOD AND APPARATUS FOR USING OSCILLATION SIGNALS WITH DIFFERENT PHASES TO DETECT CAPACITANCE VALUES AT CAPACITIVE SENSING NODES OF TOUCH PANEL - A method for detecting capacitance values of a plurality of capacitive sensing nodes located at intersections of a plurality of drive lines and a sense line on a touch panel is provided. The method includes at least the following steps: obtaining a plurality of touch sense signals corresponding to the sense line during a plurality of time slots, respectively; demodulating the touch sense signals with a first oscillation signal to generate a plurality of first demodulated signals; demodulating the touch sense signals with a second oscillation signal to generate a plurality of second demodulated signals, wherein the second oscillation signal is different from the first oscillation signal; and determining the capacitance values according to at least the first demodulated signals and the second demodulated signals. | 10-31-2013 |
20140358318 | THERMAL CONTROL METHOD AND THERMAL CONTROL MODULE APPLICABLE IN A PORTABLE ELECTRONIC DEVICE - A thermal control method for a portable electronic device includes: providing at least one capacitive temperature sensor corresponding to at least one particular location of the outside surface of the portable electronic device, the capacitive temperature sensor having a thermal characteristic which is temperature sensitive; monitoring the change of the thermal characteristic of the at least one capacitive temperature sensor to estimate the temperature of the at least one particular location; and deciding whether to perform thermal throttling in the portable electronic device based on the estimated temperature of the particular location. | 12-04-2014 |
Patent application number | Description | Published |
20090027093 | SAMPLING CIRCUIT AND METHOD - A sampling circuit for sampling an input data to obtain an output data includes a delay control unit, a first sampling unit, a second sampling unit, and a processing unit. The delay control unit delays a sampling signal for a first delay time to generate a first delayed signal, and delays the sampling signal for a second delay time to generate a second delayed signal; the first sampling unit samples the input data to obtain a first sampled value according to the first delayed signal, wherein the first sampling unit is utilized to generate the output data; the second sampling unit samples the input data to obtain a second sampled value according to the second delayed signal; and the processing unit controls the delay control unit to adjust at least the first delay time according to the first and second sampled values to calibrate the first delayed signal. | 01-29-2009 |
20090039938 | DELAYING STAGE SELECTING CIRCUIT AND METHOD THEREOF - A delaying stage selecting circuit for selecting a specific delaying stage from a plurality of delaying stages, where the delaying stages are for outputting delayed clock signals, includes: a first register for sampling the delayed clock signals according to a clock signal to generate sampled values; first memory units, wherein the first memory units are utilized to memorize the sampled values, and each of first memory unit outputs at least one of the sampled values according to a corresponding first selecting signal; a first selecting unit, for outputting the sampled values according to a second selecting signal; a determining module, for determining if the sampled values meet a specific relation, where if the determination result is positive then determining the particular delaying stage; and a counter for generating a counting value to control the delayed clock signal sampled by the first register. | 02-12-2009 |
Patent application number | Description | Published |
20090235365 | DATA ACCESS SYSTEM - A data access system includes a host and a storage device. The host has a security setup function and includes a first identity code storage block to store a first identity code. The storage device has a security check function and includes a second identity code storage block. The host executes the security setup function to set a second identity code according to the first identity code, and the second identity code is stored into the second identity code storage block. The storage device executes the security check function to determine if the host is allowed to access the storage device according to the first and second identity codes. | 09-17-2009 |
20090270071 | MOBILE PHONE ACCESSING SYSTEM AND RELATED STORAGE DEVICE - The present invention provides a mobile phone accessing system. The mobile phone accessing system comprises: a mobile phone having a first International Mobile Equipment Identity (IMEI) code; and a storage device comprising a first storage region for storing data, a second storage region for storing a second IMEI code, and a controller coupled to the first storage region and the second storage region for executing a security check function to determine whether the mobile phone is qualified to access the first storage region according to the first IMEI code. | 10-29-2009 |
20090270129 | MOBILE PHONE ACCESSING SYSTEM AND RELATED STORAGE DEVICE - The present invention provides a mobile phone accessing system. The mobile phone accessing system comprises: a mobile phone having a first Subscriber Identity Module (SIM) specification corresponding to a SIM card; and a storage device comprising a first storage region for storing data, a second storage region for storing a second SIM specification, and a controller coupled to the first storage region and the second storage region for executing a security check function to determine whether the mobile phone is qualified to access the first storage region according to the first SIM specification. | 10-29-2009 |
20090271585 | DATA ACCESSING SYSTEM AND RELATED STORAGE DEVICE - A data accessing system includes a host computer and a storage device. The host computer has a first media access control (MAC) address, and the storage device includes a first storage region, a second storage region, and a controller. The first storage region is utilized for storing data. The second storage region stores a second media access control address. The controller couples to the first storage region and the second storage region for executing a security checking function to determine if the host computer is qualified to access the first storage region according to the first media access control address. | 10-29-2009 |