Patent application number | Description | Published |
20140204056 | PARAMETER EXTRACTION SYSTEM FOR TOUCH PANEL AND PARAMETER EXTRACTION METHOD THEREOF - Disclosed herein is a parameter measuring method of a touch panel. The method measures S-parameters at cross points of electrodes of the touch panel, converts the measured S-parameters into Y-parameters, extracts all the equivalent parameters from the Y-parameters, and compensates for a loss value, thereby accurately providing electrical characteristics of the touch panel. | 07-24-2014 |
20150029141 | TOUCH SENSING APPARATUS AND METHOD CAPABLE OF SUPPORTING HOVER SENSING - Disclosed herein is a touch sensing apparatus capable of supporting hover sensing, including: a plurality of capacitance-voltage converters (C-V converters) outputting different voltage values depending on a change in capacitance of each of the sensing electrodes; a plurality of integrators integrating output voltages of each of the C-V converters; a first multiplexer multiplexing outputs of the plurality of integrators; a second multiplexer multiplexing the outputs of the plurality of integrators; a first differential amplification unit for touch sensing receiving an output of the first multiplexer and an output of the second multiplexer; a second differential amplification unit for hover sensing receiving the output of the first multiplexer and the output of the second multiplexer; and a control unit sensing a touch event or a hover event, thereby removing a common noise to accurately sense both the touch event and the hover event. | 01-29-2015 |
20150061738 | CHARGE PUMP CIRCUIT - There is provided a charge pump circuit, including: a step-up circuit unit stepping up an input voltage at least once, according to a frequency and a voltage level of a clock signal; and a control unit altering the voltage level of the clock signal according to an output voltage from the step-up circuit unit to regulate the output voltage from the step-up circuit. | 03-05-2015 |
20150177874 | APPARATUS FOR GENERATING DRIVING SIGNAL - There is provided an apparatus for generating a driving signal, the apparatus including: a first driving signal generation circuit generating a first driving signal; a second driving signal generation circuit generating a second driving signal, the second driving signal generation circuit including at least two transistors and a pulse generation unit; and a control unit controlling the first and second driving signal generation circuits so that they generate the first and second driving signals selectively. | 06-25-2015 |
20150180334 | DRIVING CIRCUIT FOR CHARGE PUMP CIRCUIT AND CHARGE PUMP SYSTEM INCLUDING THE SAME - There is provided a driving circuit for a charge pump circuit generating an output voltage by stepping-up an input voltage at least once, according to a clock signal. The driving circuit includes: an oscillator generating the clock signal; a comparison unit comparing the output voltage with a predetermined reference voltage; and a control unit generating a control signal to be provided to the oscillator, the control signal changing at least one of a frequency level and a duty level of the clock signal based on a comparison result from the comparison unit. | 06-25-2015 |
20150193042 | TOUCHSCREEN DEVICE AND METHOD FOR CONTROLLING THE SAME - A touchscreen device may include: a panel unit, a driving circuit unit, a sensing circuit unit and a control unit. The control unit may apply a driving signal to a first node capacitor formed at an intersection between a first and a first one of the plurality of sensing electrodes and calibrate gains of the plurality of converter circuit units. Each of the plurality of panel deviation calibration units may calibrate an output signal from the respective one of the plurality of converter circuit units by using a capacitance value of a first capacitor included in the respective one of the plurality of panel deviation calibration units when a driving signal is applied to the first one of the driving electrodes. | 07-09-2015 |
20150229297 | HIGH VOLTAGE DRIVER USING LOW VOLTAGE TRANSISTOR - A high voltage driver may include: a low side switching unit including first to n-th N-channel metal oxide semiconductor (NMOS) transistors; a high side switching unit including first and second to n-th P-channel MOS (PMOS) transistors; a voltage dividing unit dividing a voltage between the output terminal and the ground; a first constant voltage unit providing a constant voltage and a unidirectional signal path between a source and a gate of each of the first to n-th NMOS transistors; a second constant voltage unit providing a constant voltage and a unidirectional signal path between a source and a gate of each of the first to n-th PMOS transistors; a first charging unit providing a charged voltage to each of the gates of the second to n-th NMOS transistors; and a second charging unit providing a charged voltage to each of the gates of the second to n-th PMOS transistors. | 08-13-2015 |
20150346879 | TOUCH SENSING APPARATUS AND TOUCHSCREEN APPARATUS INCLUDING THE SAME - A touch sensing apparatus may include a driving signal generating circuit including a first switch and a second switch and providing driving signals to a first node of a node capacitor, the driving signals being generated by switching operations of the first switch and the second switch, and a C-V converting circuit including a buffer circuit having a first feedback capacitor and a third switch disposed between a second node of the node capacitor and the first feedback capacitor and transferring a charging voltage of the node capacitor to the first feedback capacitor through a switching operation of the third switch to generate an output voltage. The buffer circuit further includes a fourth switch disposed between the second node of the node capacitor and a current source, and the fourth switch is turned on in an off operation section of the third switch. | 12-03-2015 |