| Patent application number | Description | Published |
|---|
| 20110043466 | TOUCH SCREEN LIQUID CRYSTAL DISPLAY DEVICE - An touch screen liquid crystal display device includes a panel driving circuit including a gate driving block, a data driving block, and a signal control block and a liquid crystal module that stores data in data pixels through a data pixel line, to which the data pixels are connected, in response to a data signal applied from the data driving block, and reads data through a read pixel line to which read pixels are connected. The read pixels are connected to the data pixels through a share line. | 02-24-2011 |
| 20110043467 | TIMING ADJUSTING METHOD FOR TOUCH SCREEN LIQUID CRYSTAL DISPLAY DEVICE - Provided is a timing adjusting method for a touch screen liquid crystal display device. A liquid crystal module of the touch screen liquid crystal display device has a structure in which a data line connected to data pixels and a read line connected to read pixels are shared by a share line, and a display mode section for displaying data of the data pixels is performed separately from a read mode section for reading data of the read pixels. | 02-24-2011 |
| 20110096054 | LIQUID CRYSTAL DISPLAY PANEL DRIVING CIRCUIT - Disclosed is a liquid crystal display panel driving circuit for driving a liquid crystal display panel with a resolution of N bits. N-bit digital data including upper X bits and lower Y bits is inputted. The liquid crystal display panel driving circuit includes a resistor string unit according to areas, a DAC converter switching unit according to areas, and an interpolation amplifier. The resistor string unit outputs analog reference voltages at different ratios according to three areas. The DAC converter switching unit receives the N-bit digital data, selects (Y+1) analog voltages from the analog reference voltages based on the upper X bits, outputs the (Y+1) analog voltages, and outputs the (Y+1) analog voltages of different combinations based on the lower Y bits. The interpolation amplifier receives the (Y+1) analog voltages and generates an interpolated output voltage by setting weights for the (Y+1) analog voltages by using multi-factors. | 04-28-2011 |
| 20110128273 | DISPLAY PANEL DRIVING CIRCUIT AND DRIVING METHOD USING THE SAME - A display panel driving circuit includes: N number of buffers (N is an integer no less than 1) configured to buffer data voltages and enable or disable supply of buffered signals in response to a charge sharing control signal; and N number of output multiplexers each configured to receive outputs of two adjacent buffers among outputs of the N number of buffers and transfer the output of one buffer or the outputs of the two buffers to a corresponding one of data lines in response to the charge sharing control signal. | 06-02-2011 |
| 20110279131 | CIRCUIT AND METHOD FOR MEASURING CAPACITANCE VALUE OF TOUCH SCREEN - A circuit for measuring a capacitance value of a touch screen includes: a target capacitor unit having a target capacitor charged with a target charging voltage; a target voltage control unit to charge the target capacitor; a reference capacitor unit having a reference capacitor charged with a charging reference voltage; a reference voltage control unit to charge the reference capacitor; a comparator to compare the target charging voltage and the charging reference voltage and output a transition signal at a moment when the target charging voltage becomes higher than the charging reference voltage; and a controller to receive an output signal of the comparator and a clock signal and generate a digital output signal and a control signal, wherein a capacitance value of the target capacitor is measured using a time elapsed from a time when the target capacitor is initialized to a time when the transition signal is outputted. | 11-17-2011 |
| 20110279298 | DIGITAL-TO-ANALOG CONVERTER CIRCUIT USING CHARGE SUBTRACTION METHOD AND CHARGE TRANSFER INTERPOLATION METHOD - A DAC circuit using a charge subtraction method and a change transfer interpolation method includes resistor cells configured to divide a voltage of data of total K bits (=upper M bits+lower N bits) by resistance dividers; a decoder group configured to receive digital data of the M bits and the N bits divided in the resistor cells, process the digital data by the unit of 2 bits, and output respective corresponding voltages; a capacitor group configured to receive the voltages outputted from the decoder group and realize charge charging by a charge subtraction method and charge transferring by a charge transfer interpolation method; and an operational amplifier having a first input terminal which receives a reference voltage and a second input terminal which receives an interpolation voltage corresponding to an amount of charges transferred from the capacitor group, and configured to generate an output voltage. | 11-17-2011 |
| 20110279407 | CIRCUIT FOR PROCESSING TOUCH LINE SIGNAL OF TOUCH SCREEN - A circuit for processing a touch line signal of a touch screen includes a plurality of sensing read circuits and a switch unit. The plurality of sensing read circuits include sensing read-out units and integrators, respectively. The sensing read-out units are configured to precharge a first sensor capacitor and a second sensor capacitor formed on a touch screen panel with a ground voltage and a supply voltage, allow charges charged in the first sensor capacitor and the second sensor capacitor to be shared, and read-out a charge sharing result obtained by allowing the charges of the first sensor capacitor and the second sensor capacitor to be shared. The integrators are configured to integrate output voltages of the sensing read-out units. The switch unit is configured to sequentially connect output terminals of the plurality of sensing read circuits to an input terminal of an analog-to-digital converter. | 11-17-2011 |
| 20120081338 | SOURCE DRIVER INTEGRATED CIRCUIT WITH IMPROVED SLEW RATE - Disclosed is a source driver integrated circuit with an improved slew rate by disposing a switching unit, which operates as a resistance component during display driving, before the feedback line of an output buffer. According to the source driver integrated circuit with an improved slew rate, a switching unit, which operates as a resistance component when a signal is transferred, is disposed in the feedback loop of an output buffer, so that the resistance component is not shown to a panel load, thereby improving the slew rate of an output signal. In addition, the improved slew rate makes it possible to easily implement an image through a display. | 04-05-2012 |
