Lg Display Co., Ltd.

Lg Philips Lcd Co., Inc.

Lg.phillips Lcd Co., Ltd.

Jong Sang Baek

Sun Young Kwon

Chang Gon Kim

Jong Dae Kim

Chang Gone Kim

A driving apparatus and a method for a liquid crystal display wherein a picture can be inspected by a specific image signal when an image signal is not applied is provided. In the driving apparatus, an image signal processor extracts a complex synchronizing signal and a first image signal from a complex image signal input from an external source. An image signal generator generates a second image signal. An input signal detector counts the pulses in the complex synchronizing signal to generate a selection signal. An image signal selector selectively outputs any one of the first image signal from the image signal processor and the second image signal from the image signal generator in response to the selection signal. A data driver applies an output image signal selected and output by the image signal selector to the liquid crystal display panel.

Apparatus and method for driving liquid crystal display

A apparatus and method for driving a liquid crystal display that minimizes the generation of electro-magnetic interference (EMI) in a cost effective manner includes a gate control signal generator that generates a gate control signal using a externally inputted synchronizing signal, a data control signal generator that generates a data control signal using the synchronizing signal, a data aligner that re-aligns externally inputted video data, a plurality of buffers at output terminals of the gate control signal generator, the data control signal generator and the data aligner, and a control unit that applies control signals to the buffers to control current values of signals outputted by the buffers.

A liquid crystal display device and a driving method thereof that are adaptive for detecting a presence and a frequency range of an input signal applied to the liquid crystal display. In the device, a timing controller is provided with a signal presence determiner for detecting an application of an input signal from an interface. The signal presence determiner is provided with an oscillator for generating a reference clock having the same frequency as a horizontal synchronizing signal and a pre-synchronizing signal having the same frequency as a vertical synchronizing signal, a period detector for comparing a data enable signal from the exterior thereof with the reference clock to output a period of the input signal with the aid of a detection reference signal and the pre-synchronizing signal, a period comparator for comparing a period range between a desired maximum value and a desired minimum value of the input signal, and signal presence/absence comparing means for determining a presence/absence of the input signal in response to a pulse number of the input signal detected within a period range between the maximum value and the minimum value during an application interval of the detection reference signal.

Liquid crystal display and driving method thereof

A driving apparatus for a liquid crystal display capable of adjusting a field area displayed on a liquid crystal display panel at the exterior thereof is disclosed. In the apparatus, an image signal processor separates a television image signal from a complex image signal and separates a complex synchronizing signal. A liquid crystal display panel displays the television image signal. A timing controller generates a source start pulse determining a display start time of the television image signal displayed on the liquid crystal display panel using an internal clock signal and the complex synchronizing signal from the image signal processor. A delay circuit delays the internal clock signal to apply it to the timing controller.

Driving apparatus for liquid crystal display

A method of driving a liquid crystal display to eliminate stripe-shaped noise when a picture screen is displayed on an enlarged viewing area includes dividing a liquid crystal into a plurality of blocks, and setting widths of scanning pulses for a gate electrode pair supplied with the same data differently for each block, wherein the gate electrode pair includes first and second gate lines.

Method of driving liquid crystal display for expanding an effective picture field

A driving apparatus for a liquid crystal display that reduces a residual direct current component from flowing in a liquid crystal is disclosed. In the apparatus, a liquid crystal display panel has liquid crystal cells at crossing of gate lines and data lines. An image signal processor separates a television image signal from a complex image signal and converts a polarity of the television image signal in response to a polarity inversion signal. A timing controller generates the gate control signal for time-dividing the plurality of gate lines to sequentially drive them during one horizontal period and driving the gate lines during one horizontal period and then applying it to the gate driver, and that generates the polarity inversion signal inverted for each one horizontal period and then applying it to the image signal processor.

A apparatus and method for driving a liquid crystal display that minimizes the generation of electromagnetic interference (EMI) in a cost effective manner includes a gate control signal generator that generates a gate control signal using a externally inputted synchronizing signal, a data control signal generator that generates a data control signal using the synchronizing signal, a data aligner that re-aligns externally inputted video data, a plurality of buffers at output terminals of the gate control signal generator, the data control signal generator and the data aligner, and a control unit that applies control signals to the buffers to control current values of signals outputted by the buffers.

A driving apparatus and apparatus for a liquid crystal display wherein an image format of an NTSC image signal can be selectively converted in response to an instruction of a user. In the apparatus, a liquid crystal display panel has liquid crystal cells arranged at intersections between gate lines and data lines to display an image signal in an image format different from an input image signal. A switch generates a pulse signal by an operation of a user. A counter counts said pulse signal. A timing controller changes an image format of said image signal displayed on the liquid crystal display panel in response to an input signal from the counter.

Driving apparatus and method for liquid crystal display

A method and apparatus for driving a liquid crystal display for reducing the number of data lines is disclosed. In the apparatus, a timing controller receives red sub-pixel data, green sub-pixel data and blue sub-pixel data from the exterior thereof and then divides the received data into odd-numbered sub-pixel data and even-numbered sub-pixel data. A data driver receives the odd-numbered sub-pixel data and the even-numbered sub-pixel data from the timing controller during one horizontal period and then applies the received odd-numbered and even-numbered sub-pixel data to data lines during the one horizontal period.

Method and apparatus for driving liquid crystal display

A liquid crystal display device that are adapted to display a certain information to a user when no signal is input after a power was applied to the liquid crystal display device. In the device, a liquid crystal display panel has pixel electrodes arranged in a matrix type. A timing controller generates and outputs control signals for driving the liquid crystal display panel in response to a timing synchronizing signal inputted from the exterior thereof, and re-arranges and outputs an input data. A drive circuit is connected between the liquid crystal display panel and the timing controller to display a data inputted from the timing controller on the liquid crystal display panel in response to the control signal. An oscillator generates a pre-synchronizing signal having a desired frequency to apply the same to the timing controller. A signal presence determiner compares the timing synchronizing signal with the pre-synchronizing signal to generate a determining signal indicating an input existence of the timing synchronizing signal. A control signal generator generates a control signal on the basis of the pre-synchronizing signal in response to a determining signal indicating no input of the timing synchronizing signal. A data storage device stores a certain picture data and outputs the picture data to the drive circuit in response to the determining signal indicating no input of the timing synchronizing signal.

A liquid crystal display including a gate driver driving gate lines on a liquid crystal display panel, a timing controller controlling the gate driver, and a masking part selectively intercepting a gate output enable signal corresponding to an abnormal state of a gate high voltage, wherein the gate output enable signal is supplied to the gate driver from the timing controller.

A liquid crystal display device with a multi-timing controller that generates a timing signal according to an individual display standard from a control signal according to various display standards to drive the liquid crystal display device. In the device, a liquid crystal display panel has a display standard corresponding to an arranged pixel. An interface receives a data inputted from the exterior thereof and a control signal corresponding to the display standard. A timing controller latches and outputs a data inputted from the interface, and generates and outputs timing signals for driving the liquid crystal display panel from the control signal. A driving circuit receives the timing signals from the timing controller to display a picture corresponding to the data on the liquid crystal display panel. In the timing controller, a display standard set part sets one display standard in response to a plurality of display standards and generates a setting signal corresponding to the display standard. A selector has each timing generation information according the plurality of timing standards and outputs a timing information corresponding to the set signal. A timing generator receives the timing information to generate and output the timing signals from the control signal.

Liquid crystal display device with multi-timing controller

A liquid crystal display capable of diagnosing an abnormal driving state of a system and a liquid crystal display panel. In the liquid crystal display, a liquid crystal display panel has pixel cells arranged in a matrix pattern. A system supplies a timing synchronizing signal and video data. A timing controller generates timing control signals for driving the liquid crystal display panel in correspondence with the timing synchronizing signal inputted from the system, and re-arranges and outputs the input video data. A switching device generates a desired driving control signal. A self-diagnosing circuit applies a specific data to the liquid crystal display panel in response to the driving control signal. A driver is connected between the liquid crystal display panel and the timing controller to display the video data inputted from the timing controller on the liquid crystal display panel in correspondence with the control signals.

Liquid crystal display

A liquid crystal display device for restraining a generation of transient current is disclosed. In the device, a line memory divides a data for at least one line inputted from the exterior thereof into a plurality of groups to store the divided data therein and outputs the data at a desired unit from each of the groups. A driving circuit includes n driver integrated circuits (wherein n is an integer) that are connected to the line memory and a liquid crystal display panel to drive the liquid crystal display panel in response to the data outputted from the line memory. A timing controller is connected to the line memory and the driving circuit to receive a data clock inputted from the exterior thereof for outputting the data from the plurality of groups of said line memory to the driving circuit every period of the data clock in response to a time corresponding to the number of said groups.

Growing community of inventors

Kumi-shi, South Korea

Jong Sang Baek