Silicon Works Co., Ltd.

Joon Ho Na

Dae Seong Kim

An Young Kim

Young Bok Kim

Dae Keun Han

Hyun Ho Cho

Ji Hun Kim

Young Tae Kim

Hyun Kyu Jeon

Soo Woo Kim

Yong Icc Jung

Yun Tack Han

Jung Hwan Choi

Pyung Sik Ma

Hyun Min Song

Joung Cheul Choi

Kwang Il Oh

Sang Woo Kim

Taiming Piao

Yong Jung Kwon

Young Suk Son

Hyung Seog Oh

Hun Yong Lim

Hae Won Lee

Hyun Ja Cho

Yeong Joon Son

Jung Il Seo

Yong Bok Kim

Young Ki Kim

Sang Gug Lee

Kyung Chun Kim

Gyu Hyeong Cho

Kyu Sung Park

Ki Uk Gwak

Na Ra Hong

Hye Lan Kim

Young Icc Jung

Jeong Cheul Choi

Sung Wan Jung

Kwang Ii Oh

Disclosed is a display driving device. The display driving device may include: a buffer circuit including a positive output amplifier and a negative output amplifier; a switch circuit including output switches connected in series between the positive output amplifier and a first source output terminal, between the positive output amplifier and a second source output terminal, between the negative output amplifier and the first source output terminal, and between the negative output amplifier and the second source output terminal, respectively; and a reset circuit configured to reset output terminals of the positive output amplifier and the negative output amplifier to a middle voltage immediately before switching of the switch circuit for polarity inversion of the first and second source output terminals.

Display driving device

Disclosed is a display driving device capable of reducing an output response delay of an output buffer. The display driving device may include: a first DAC configured to load a first grayscale voltage corresponding to first digital data as a first DAC signal; a second DAC configured to load a second grayscale voltage corresponding to second digital data as a second DAC signal; and an output buffer configured to alternately select the first DAC signal loaded to a first input terminal and the second DAC signal loaded to a second input terminal.

Disclosed are a source driver and a display device including the same. The source driver may include: an output buffer unit including a pair of output buffers controlled by a first power down signal and another pair of output buffers controlled by a second power down signal; and a charge sharing unit configured to control output buffers to share charge when the first or second power down signal is enabled, the output buffers being driven in the same driving range among the pair of output buffers and the other pair of output buffers.

Source driver having low power consumption and display device including the source driver

An output circuit of a display driving device may include: an output buffer unit configured to buffer a pair of input signals having different polarities and output a pair of output signals; and a switching unit configured to transmit the pair of output signals to a pair of output terminals through a direct path or a cross path during an output period, and charge-share the pair of output terminals using a middle voltage of a pull-up voltage and a pull-down voltage of the output buffer unit during a charge-sharing period.

Output circuit and switching circuit of display driving device

Provided are a source driver and a display device. The source driver may include: a gamma voltage generation unit configured to select and provide one or more of the gamma voltages in response to a first power down signal; an output buffer unit configured to provide a data voltage to a output terminal in response to a second power down signal; and a selection unit configured to provide the gamma voltage to the output terminal.

Source driver and display device including the same

A circuit for driving an organic light emitting diode display includes a display panel that displays an image by using organic light emitting diodes disposed at intersection areas of a plurality of gate lines and a plurality of data lines; a threshold voltage detection control unit that supplies a precharge voltage by sequentially turning on transistors for threshold voltage detection, which are connected among the data lines and the organic light emitting diodes on the display panel, in units of horizontal lines, and enables threshold voltages to be detected; and a source driver that detects threshold voltages of all organic light emitting diodes arranged on a corresponding horizontal line, and repeats an operation, as necessary, for sampling/holding the detected threshold voltages through M sample/hold circuits, converting the sampled/held threshold voltages into digital signals, and storing the digital signals in a memory.

Circuit and method for driving OLED display

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.

Output voltage stabilization circuit of display device driving circuit

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.

Driver IC chip and pad layout 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.

Circuit for driving LCD device and driving method thereof

An LCD driving circuit includes a first buffer configured to have a terminal for a first voltage, a terminal for a second voltage and a terminal for an intermediate voltage between the first voltage and the second voltage, and be driven in a range from the first voltage to the intermediate voltage; and a second buffer configured to have a terminal for the first voltage, a terminal for the second voltage and a terminal for the intermediate voltage, and be driven in a range from the intermediate voltage to the second voltage. The terminal for the intermediate voltage of the first buffer and the terminal for the intermediate voltage of the second buffer are connected with each other, and the first voltage is a highest voltage, the second voltage is a lowest voltage, and the intermediate voltage is in a range from the first voltage to the second voltage.

Liquid crystal display driving circuit with less current consumption

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.

Source driver circuit of liquid crystal display device

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.

Display driving circuit having half VDD power supply circuit built therein and display driving system including the same

Embodiments of the present invention provide a method and apparatus for transmitting data between a timing controller and a source driver. In some embodiments, the method includes a bit error rate test (BERT) function for sensing an error rate in real time when data is transmitted and received between the timing controller and the source driver.

Method and apparatus for transmitting data between timing controller and source driver, having bit error rate test function

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.

COG panel system arrangement

The present invention aims to provide a driving control circuit of a display device that is capable of preventing an unnatural black screen. To this end, the driving control circuit is configured to include a plurality of TMICs, each of which is merged with a timing controller and a source driver, and the time controller is configured to adjust end locations of the horizontal blank intervals of data enable signals to match the end locations outputted from TMICs to an end location of a horizontal blank interval of a data enable signal outputted from another TMIC, and, when a gate output enable signal is supplied, perform adjustment so as to indicate a rising edge of the gate output enable signal before the data latch enable signal having the highest frequency is supplied.

Growing community of inventors

Daejeon-si, South Korea

Joon Ho Na