Lg Display Co., Ltd.

Lg Philips Lcd Co., Inc.

Sin Kyun Park

Kang Ju Lee

Moo Kyoung Hong

Jung Hyeok Yun

Jeong Whan Lee

A driving device of an electroluminescent display apparatus includes a pixel line determiner selecting a representative pixel line, disposed at a position at which an accumulation stress caused by an input image is largest, from among all pixel lines, a first sensing & driving circuit pre-sensing pixels of the representative pixel line for each color, an over driving control (ODC) controller selecting a color-based sample pixel characteristic value from among pixel characteristic values of the representative pixel line obtained through the pre-sensing and controlling a sensing priority of each color, based on a relative magnitude of a variation amount of the color-based sample pixel characteristic value, a second sensing & driving circuit performing ODC sensing on color pixels of all pixel lines, based on the sensing priority, and a compensation value generator updating compensation values of the color pixels, based on pixel characteristic values of the color pixels obtained through the ODC sensing, wherein a sensing data voltage supplied to each of the color pixels has multi-voltage levels, in a sensing period for the ODC sensing.

Driving device and driving method of electroluminescent display apparatus

A driving apparatus of a liquid crystal display device for reducing or automatically restoring a driving current of a light source by being inversed or re-inversed a phase of a driving current with which a light source of a liquid crystal display device is supplied by the human body is disclosed. In the driving apparatus of the liquid crystal display device, a driving controller reduces or restores a duty ratio of a driving control signal which controls a generation of a driving current of a backlight assembly in accordance with whether a predetermined enable signal is applied or not. A master inverter reduces or restores a level of a driving current of the backlight assembly in accordance with a duty ratio of a driving control signal from the driving controller. A slave inverter reduces or restores a level of a driving current of the backlight assembly in accordance with a duty ratio of the driving control signal. And a current limiting circuit applies the predetermined enable signal to a ground or the driving controller in accordance with a phase of feedback currents of the master inverter and the slave inverter.

Apparatus and method for driving liquid crystal display device

A driving apparatus of a backlight includes a controller for controlling square wave oscillation, a square wave oscillator for oscillating a constant square wave signal in accordance with a control signal from the controller, and a signal generator for generating a burst dimming signal using the square wave signal.

Driving apparatus of backlight and method of driving backlight using the same

A lamp driving device includes a switch circuit for supplying a signal; a transformer which boosts a voltage of the signal from the switch circuit and supplies the boosted voltage to at least one lamp; a safety circuit which compares a threshold value with at least one of the boosted voltage and a current through the lamp, and intercepts at least one of the boosted voltage and the current through the lamp in accordance with the comparison result; and a warming part for warming the lamp in an early stage with a voltage less than or equal to the threshold value.

Lamp driving device and driving method thereof

A backlight unit includes at least one cold cathode fluorescent lamp arranged at a lower end of a bottom cover, external electrode fluorescent lamps arranged on the bottom cover above the cold cathode fluorescent lamp, and inverters disposed on a rear side of the bottom cover for driving the at least one cold cathode fluorescent lamp and the external electrode fluorescent lamps.

Backlight unit and method of driving the same

A lamp driving device for driving a plurality of lamps in a liquid crystal display device and a liquid crystal display device using a lamp driving device are provided. The lamp driving device includes an inverter substrate, a plurality of transformers on the inverter substrate to supply a high voltage AC waveform to each of the lamps; and a plurality of pattern capacitors on the inverter substrate to limit the electric current supplied to each of the lamps. The patterns capacitors have a plurality of capacitor patterns on a front surface of the inverter substrate with a designated distance therebetween and a first ground line on a rear surface of the inverter substrate overlapping the capacitor patterns.

Lamp driving device for liquid crystal display device

A method for driving backlight unit includes generating at least one pulse, after generating the at least one pulse, generating a driving signal having a constant state, supplying a predetermined capacitor voltage to a lamp assembly, wherein the predetermined capacitor voltage corresponds to the at least one pulse, and supplying a second voltage to the lamp assembly supplied with the predetermined capacitor voltage, wherein the second voltage corresponds to the driving signal and wherein the lamp assembly emits light in response to the supplied second voltage.

Growing community of inventors

Gyeongsangbuk-do, South Korea

Sin Kyun Park