Patent application number | Description | Published |
20080204442 | DRIVING DEVICE OF PLASMA DISPLAY PANEL AND METHOD - A driving device of a plasma display panel for performing a reset period using a ramp pulse. The driving device changes the lowest potential of the ramp down pulse in response to temperature change in order to prevent or reduce low discharge or over-discharge due to the temperature change. The amount of wall charges in the pixels are maintained substantially constant over a temperature range to provide an optimal discharge condition, making it possible to prevent the discharge error and perform the low voltage address operation, in the address period. | 08-28-2008 |
20080211738 | CHASSIS BASE ASSEMBLY AND DISPLAY APPARATUS INCLUDING THE SAME - Provided is a chassis base assembly and a display apparatus including the same. The chassis base assembly includes a chassis base having a plurality of protrusions disposed thereon, the plurality of protrusions extending parallel to each other on the chassis base; and a circuit board disposed on the chassis base between the protrusions and having electronic devices mounted thereon. | 09-04-2008 |
20080212270 | Coupling structure of chassis base and circuit board and display apparatus including the same - Example embodiments relate to a coupling structure including a chassis base configured to support a display panel, and an electromagnetic wave shielding member connected to the chassis base so as to form an area for installing a circuit board. The electromagnetic wave shielding member may surround the circuit board. | 09-04-2008 |
20080238823 | Plasma display device and driving method thereof - Disclosed plasma display device includes a plurality of electrodes, drivers, a plurality of discharge cells and a controller which detects the frequency of an input video signal, determines whether the frequency is changed compared to that of a previous input video signal, and determines whether or not applying a control waveform to the plasma display device. | 10-02-2008 |
20080246754 | Method of driving discharge display panel performing adaptive initialization - Provided is a method of driving a discharge display panel that applies a reset driving signal to all display cell in the discharge display panel during an initialization period. The reset driving signal includes a rising voltage signal and a descending voltage signal. A rising rate of the rising voltage signal and the descending rate of the descending voltage signal change depending on temperature of the discharge display panel. | 10-09-2008 |
Patent application number | Description | Published |
20140022227 | VOLTAGE GENERATOR AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A voltage generator includes a DC/DC converter configured to output a first voltage during a first period of a frame period, the DC/DC converter being connected to a first power voltage and to a second power voltage lower than the first power voltage, a first transistor coupled between the DC/DC converter and an output terminal, the first transistor being configured to be turned on during the first period, a second transistor coupled between the output terminal and a third voltage source, the third voltage source being configured to supply a third voltage lower than the first voltage, and the second transistor being configured to be turned on during a third period of the frame period, and a voltage controller coupled to the output terminal, the voltage controller being configured to limit a voltage of the output terminal. | 01-23-2014 |
20140028651 | VOLTAGE GENERATOR, DRIVING METHOD FOR THE VOLTAGE GENERATOR AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A voltage generator includes a DC/DC converter and first to third transistors. The DC/DC converter outputs a first voltage during a first period of a frame period and does not output the first voltage during other periods of the frame. The first transistor is coupled between the DC/DC converter and an output terminal, and is to be turned on during the first period. The second transistor is coupled between the output terminal and a third voltage source that supplies a third voltage lower than the first voltage, and is to be turned on during a second period of the frame period. The third transistor is coupled between the output terminal and a second voltage source that supplies a second voltage identical to or lower than the first voltage, and is to be turned on during a third period of the frame period. | 01-30-2014 |
20140139506 | DISPLAY DEVICE, POWER CONTROL DEVICE, AND DRIVING METHOD THEREOF - A display device having a particular power controller circuit is disclosed. In one aspect, the display includes a plurality of pixels, and a power controller for supplying a first power source voltage and a second power source voltage for providing a driving current of the plurality of pixels wherein the power controller connects at least one of a first high level voltage, a ground, and a capacitor to a first node connected to the first power source voltage, and connects one of a second high level voltage and the ground to a second node connected to the second power source voltage. | 05-22-2014 |
20140333603 | DISPLAY DEVICE, CONTROL DEVICE FOR DRIVING THE DISPLAY DEVICE, AND CONTROL METHOD THEREOF - Provided is a display device, including: a display unit including a plurality of pixels that emit light according to a plurality of data signals supplied through a plurality of data lines; a power voltage supplier configured to supply a power voltage to the plurality of pixels; a current detector configured to detect a total current flowing in the plurality of pixels; and a controller configured to receive image information of one frame unit and generate a reference voltage signal corresponding to the image information of one frame unit. The current detector compares the total current and the reference voltage signal and controls driving of the power voltage supplier according to the comparison. | 11-13-2014 |
20150054817 | POWER SUPPLY DEVICE, ORGANIC LIGHT EMITTING DISPLAY DEVICE HAVING THE SAME, AND METHOD OF SUPPLYING POWER - A power supply device includes an SMPS circuit including an electric transformer having first and second stages, the SMPS circuit generating a second stage output voltage using the electric transformer, a power switcher receiving and switching the second stage output voltage to generate a first power voltage having logic high and low levels in one frame, and a PWM controller controlling a voltage level of the second stage output voltage by providing a control signal to the first stage. The first power voltage is simultaneously provided to a plurality of pixels, and a magnitude of the logic low level is increased or decreased according to a magnitude of an image load, where the magnitude of the image load is dependent on a color and a gradation level of an image to be displayed in a next frame. | 02-26-2015 |