Lg Electronics Inc.

Jang Hwan Cho

Tae Hyung Kim

Seong Ho Kang

Won Sik Yoon

Seong Hak Moon

Gop Sick Kim

Yun Kwon Jung

Jeong In Cheon

Eung Kwan Lee

Nam Kyu Lee

Yang Keun Lee

Ju Won Seo

Won Soon Kim

Se Joon You

Bong Gyun Kim

Bong Hwan Kwon

Eung Gwan Lee

Do Hyung Lee

Byeong Kil Ahn

A light emitting diode (LED) illumination device having a power compensation function is provided. The illumination device includes a light emitting unit including a plurality of LEDs connected in series, a rectifier for rectifying input AC power to provide a rectified voltage to the light emitting device, and a power compensator for detecting a change in the rectified voltage provided to the light emitting device and compensating a current provided to the light emitting device according to the detected change in the rectified voltage.

Power compensation device and light emitting diode illumination apparatus having the same

A plasma display panel for adaptively reducing load effect and improving luminescence efficiency and discharge efficiency, and a driving method thereof. A plasma display panel includes a capacitive load; a source capacitor; a sustain voltage source to generate a sustain voltage; a first inductor formed on a first current path where a current flows from the capacitive load to the source capacitor; a second inductor formed on a second current path where a current flows from the source capacitor to the capacitive load; a switch configuration and switch control circuit that controls the switching operations of the switch configuration such that at least two discharges may occur during one sustain pulse cycle.

Plasma display and driving method thereof

A plasma display panel employs a voltage circuit having an input and an output, the voltage circuit configured for supplying a negative voltage for an electrode. The plasma display panel also employs a power supply that has a positive terminal and a negative terminal, where the negative terminal is connected to the input of the voltage circuit. The power supply is otherwise configured relative to the voltage circuit such that the voltage difference between the output and the input of the voltage circuit is fixed as a function of the power supply. By fixing this voltage difference, parasitic capacitance is minimized, power consumption and calorific value are reduced, and the plasma display panel operates in a more stable manner.

Plasma display

Disclosed are an energy recovery apparatus and method for a plasma display panel. The energy recovery apparatus includes a sustain voltage source for supplying a sustain voltage, a panel capacitor formed equivalently at a discharge cell, a first charging circuit for forming a first charging path when one side of the panel capacitor is charged, a second charging circuit for forming a second charging path when the other side of the panel capacitor is charged, a first power circuit for supplying the sustain voltage to the panel capacitor and forming the first charging path, and a second power circuit for supplying a ground voltage generated from a ground voltage source to the panel capacitor and forming the second charging path. The energy recovery apparatus and method according to the present invention can decrease components in number and reduce power consumption and manufacturing cost by charging the other side of the panel capacitor using a charging voltage of one side of the panel capacitor.

Energy recovery apparatus and method for plasma display panel

It is disclosed that there is a sustaining pulse generator of a plasma display panel capable of simplifying a circuit configuration thereof. A sustaining pulse generator of a plasma display panel according to an embodiment of the present invention includes a DC converter for converting AC voltage to DC voltage; a switching part for switching the DC voltage to convert into square wave; a transformer for inducing the square wave to an output terminal thereof connected to a panel; and a rectifier for rectifying the square wave induced to the output terminal to apply to the panel.

Generator for sustaining pulse of plasma display panel

An energy recovering apparatus and method for a plasma display panel that is capable of supplying a sustain pulse having a rapid rising time. In the apparatus and method, a voltage source supplies a sustain voltage to the panel. A first inductor recovers an energy stored in the panel into the voltage source, and a second inductor receives energy from the voltage source in which the recovered energy has been stored to charge the received energy. Switching devices shuts off a path between the voltage source and the second inductor in a state in which energy has been stored in the second inductor to derive an inverse voltage into the second inductor and allows said inverse voltage to be applied to the panel.

Energy recovering apparatus and method for plasma display panel

There is explained a method and apparatus of driving a plasma display panel that is capable of increasing a driving margin upon a selective writing and a selective erasing in case that not only the selective writing but also the selective erasing are carried out within one frame period. A method of driving a plasma display panel that selects cells in use of selective writing sub-fields and selective erasing sub-fields arranged within one frame period and has a plurality of scanning electrodes, a plurality of sustaining electrodes and a plurality of address electrodes, according to an embodiment of the present invention includes steps of selecting an on-cell by generating a writing discharge in use of a first scanning voltage in the selective writing sub-fields; and selecting an off-cell by generating an erasing discharge in use of a second scanning voltage in the selective erasing sub-fields.

Method and apparatus for driving plasma display panel using selective write and selective erase

A plasma display panel driving method and apparatus that is capable of driving a PDP at a high speed as well as improving the contrast. In the method, at least one selective writing sub-field is used to turn on discharge cells selected in an address interval. At least one selective erasing sub-field is used to turn off the discharge cells selected in the address interval. The selective writing sub-field and the selective erasing sub-field are arranged within one frame.

Growing community of inventors

Kumi-shi, South Korea

Jang Hwan Cho