Patent application number | Description | Published |
20100265274 | OFFSET COMPENSATION GAMMA BUFFER AND GRAY SCALE VOLTAGE GENERATION CIRCUIT USING THE SAME - Disclosed are an offset compensation gamma buffer and a gray scale voltage generation circuit using the same. The offset compensation gamma buffer includes: a buffer which outputs an input voltage input to a positive or negative input terminal as an output voltage; and a switching unit which selectively connects the input voltage and the output voltage of the buffer to the positive and negative input terminals in response to a control signal. The output voltage of the offset compensation gamma buffer is supplied to the input of a gray scale voltage generation circuit of a source driver for driving a liquid crystal panel. The offset of the offset compensation gamma buffer is compensated using an inversion timing of the control signal. The output voltage of the offset compensation gamma buffer is supplied as a reference voltage of the voltage divider unit for generating the gray scale voltages, and the offset of the gray scale voltages is also compensated. | 10-21-2010 |
20110012877 | METHOD FOR GENERATING FRAME-START PULSE SIGNALS INSIDE SOURCE DRIVER CHIP OF LCD DEVICE - Provided is a method of driving a liquid crystal display apparatus, and more particularly, to a method of generating a frame start pulse signal for instructing driving of a specific function of a source driver in a source driver chip of a liquid crystal display apparatus. Accordingly, by generating a frame start pulse signal for instructing driving of a specific function of a source driver in a source driver chip unlike a conventional method where the frame start pulse signal is externally input, it is possible to reduce the number of input pins for inputting the frame start pulse signal and to remove an input line for inputting the frame start pulse signal in a process of mounting the source driver chip in a printed circuit board. | 01-20-2011 |
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 |
20110057968 | COG PANEL SYSTEM ARRANGEMENT - Provided is a COG panel system capable of minimizing a block dim effect by considering a relationship among a plurality of chips. The COG panel system includes: an FPC which supplies at least two power supply voltages having a constant voltage level; a plurality of SDIs which are commonly supplied with a bypass power supply voltage from the FPC and generate respective parts of a plurality of consecutive LCD driving signals required for an arbitrary one line of an LCD; and at least one block dim correction resistance. | 03-10-2011 |
20110109816 | CIRCUIT FOR DRIVING LCD DEVICE AND DRIVING METHOD THEREOF - A liquid crystal display driving circuit and method. A data register block of a controller applies in advance a polarity control signal to data before the data are stored in latches of a data driver, exchanges the data, and then stores the exchanged data in the latches. Thereby, it is possible to provide multiplexers, which are otherwise required for respective channels, to one controller and to decrease the size of a chip. | 05-12-2011 |
20110133972 | GAMMA VOLTAGE GENERATOR AND DAC HAVING GAMMA VOLTAGE GENERATOR - A gamma voltage generator includes an RGB common gamma voltage generation section configured to generate RGB common gamma voltages using corresponding gamma reference voltages among a plurality of gamma reference voltages; and at least two of an RG gamma voltage generation section configured to generate RG gamma voltages using corresponding gamma reference voltages among the plurality of gamma reference voltages, an R gamma voltage generation section configured to generate R gamma voltages using corresponding gamma reference voltages among the plurality of gamma reference voltages, a G gamma voltage generation section configured to generate G gamma voltages using corresponding gamma reference voltages among the plurality of gamma reference voltages, and a B gamma voltage generation section configured to generate B gamma voltages using corresponding gamma reference voltages among the plurality of gamma reference voltages. | 06-09-2011 |
20110148848 | OUTPUT DRIVER OF ELECTRONIC PAPER DISPLAY DEVICE - An output driver of an electronic paper display device includes M number of output driver sections configured to transmit M number of pieces of data, respectively, to the electronic paper display device, wherein the M number of output driver sections are divided into a plurality of groups, and are temporally dispersed and driven according to groups, thereby transmitting the M number of pieces of data to the electronic paper display device. Also, an output driver for transmitting data to an electronic paper display device includes N number of drivers, wherein a part of the N number of drivers are selected and driven according to an output impedance of the electronic paper display device. Since output driver sections are divided into groups and are dispersedly driven, peak current is reduced. Since drivers are selectively driven according to the sizes of output loads, a constant driving capability is provided. | 06-23-2011 |
20120161661 | DISPLAY DRIVING CIRCUIT HAVING HALF VDD POWER SUPPLY CIRCUIT BUILT THEREIN AND DISPLAY DRIVING SYSTEM INCLUDING THE SAME - The present invention relates to a display driving circuit and a display driving system, and more particularly, to a display driving circuit having a half-VDD power supply circuit built therein and a display driving system including the same, in which the display driving circuit is further provided with a half voltage VDD terminal in addition to the highest voltage VDD terminal and the lowest voltage VSS terminal, and the half voltage, which is between the highest voltage and the lowest voltage, is generated and supplied by the half voltage power supply from the inside of the display driving circuit, rather than being supplied from an external power supply. | 06-28-2012 |
20120299903 | SOURCE DRIVER CIRCUIT OF LIQUID CRYSTAL DISPLAY DEVICE - Provided is a technology for preventing noisy data from being displayed before valid data is inputted when power is turned on in a liquid crystal display. A source driver circuit for a liquid crystal display includes: a power supply voltage input unit configured to divide a first power supply voltage and a second power supply voltage, such that a middle level of the second power supply voltage is lower than a level of the first power supply voltage; a power supply voltage comparison unit configured to compare division voltages inputted from the power supply voltage input unit, and output an output voltage of a high level in a time period in which the middle level of the second power supply voltage is higher than the level of the first power supply voltage; a Schmitt trigger configured to output the output voltage of the power supply voltage comparison unit as a reset signal while preventing a sensitive response to external environment; and a specific voltage supply unit configured to output a voltage of a specific level in a time period between the input of the reset signal from the Schmitt trigger and the input of a first gate start pulse. | 11-29-2012 |
20130162618 | OUTPUT VOLTAGE STABILIZATION CIRCUIT OF DISPLAY DEVICE DRIVING CIRCUIT - The present invention relates to an output voltage stabilization circuit. Specifically, the present invention relates to an output voltage stabilization circuit of a display device driving circuit, which generates a reference current dependent on a high source voltage using a current source independent of a magnitude of the high source voltage, generates a reference current dependent on a low source voltage using a current source independent of a magnitude of the low source voltage, and then generates a control signal by comparing the magnitudes to each other, whereby the output voltage stabilization circuit may stabilize an output voltage regardless of an order in which the low source voltage and the high source voltage are turned off in a circuit using both the low source voltage and the high source voltage. | 06-27-2013 |
20130335123 | DRIVER IC CHIP AND PAD LAYOUT METHOD THEREOF - Provided is a driver IC chip of a liquid crystal display (LCD). The driver IC chip has a layout of power pads, which may uniformly apply an adhesive force on the entire adhesion surface of the driver IC chip, when the driver IC chip is mounted on a display panel according to a chip-on-glass (COG) technique. | 12-19-2013 |
20140091998 | INPUT BUFFER CIRCUIT AND GATE DRIVER IC INCLUDING THE SAME - The present invention discloses an input buffer circuit capable of recognizing and driving a low-voltage signal, output from a low-voltage environment, in a high-voltage environment and a gate driver IC including the input buffer circuit. The input buffer circuit is configured to include two or more multi-stage inverters and to recognize and output a gate signal having a different voltage domain from an operating voltage. Accordingly, a signal interface environment between chips operating in different voltage domains can be provided. | 04-03-2014 |
20140375536 | DISPLAY DRIVING CIRCUIT AND DISPLAY DEVICE - A display driving circuit is configured to select one of application of a pair of pixel driving signals to a pair of output terminals and charge sharing between the pair of output terminals by using charges discharged from a display panel. | 12-25-2014 |