Abstract: Set-up, write, sustain and erase pulses are variously applied to a plasma display panel using a staircase waveform in which the rising or falling portion is in at least two steps. These staircase waveforms can be realized by adding at least two pulses. Use of such waveforms for the set-up, write and erase pulses improves contrast, and use for the sustain pulses reduces screen flicker and improves luminous efficiency. This is of particular use in driving high definition plasma display panels to achieve high image quality and high luminance.

Abstract: A voice circuit is arranged on a chassis member. The voice circuit comprises a voice output amplifier and a high-frequency bypass unit. An output terminal of the voice output amplifier is connected to one end of a voice coil in a speaker through an interconnection, and is grounded through a high-frequency bypass unit. The voice output amplifier supplies a voice current to the voice coil through an interconnection. The resonance frequency of the high-frequency bypass unit is set to the same frequency as that of a discharge current flowing in the chassis member. A high-frequency induced current generated in the voice circuit due to the discharge current flowing in the chassis member flows to a ground terminal through the high-frequency bypass unit.

Abstract: A method of driving a gas discharge device for displaying a frame with gradation. A charge producing voltage and a charge adjusting voltage are successively applied in an address preparation period to respective subfields.

Abstract: The present invention relates to a plasma display apparatus and driving method thereof. In accordance with a plasma display apparatus and driving method thereof, widths of scan pulses are different depending on locations of the scan lines. Since scan pulse widths are set depending on locations of the scan lines, high speed driving is possible, a sustain period can be secured and luminance can be increased.

Abstract: A plasma display apparatus and a method of driving the same are disclosed. In the plasma display apparatus, a relative time ratio of one of a reset period, an address period or a sustain period of an r-th subfield of each of a p-th frame and a q-th frame is substantially equal to each other at a reference time point of the r-th subfield of each of the p-th frame and the q-th frame. The relative time ratio is the ratio of a duration of a portion of one period of a reset period, an address period or a sustain period in one subfield to a total duration of one period. The duration of the portion ranges from a start time point of one period to the reference time point.

Abstract: A load drive circuit, successfully suppressed in unnecessary electromagnetic wave generation through suppressing transition time in the drive voltage waveform even under a reduced effective load, and a display device using this circuit are provided, wherein the circuit comprises a drive circuit inversively amplifying a signal, used for driving a load, input through an input terminal, and output from an output terminal; a first current source connected to the input terminal of the drive circuit and being capable of controlling current output; and a first switch circuit connected between the input terminal of the drive circuit and a first reference potential point.

Abstract: A PDP apparatus comprises, in a circuit part, a ramp output device which outputs a ramp wave to electrodes of a PDP. The ramp output device has a ramp generator which generates and outputs a first ramp wave of which inclination is variable, an impedance conversion circuit which receives the first ramp wave as input and outputs a second ramp wave produced by impedance conversion, and a feedback circuit which receives the second ramp wave as input and feeds it back to the input of the ramp generator. The ramp generator outputs the second ramp wave as a ramp wave (output voltage). Techniques to realize output of stabilized ramp wave in a PDP apparatus so as to stabilize PDP display operations are provided.

Abstract: A method of driving a display panel is provided which can reduce power consumption. During a unit display period, the number of times of second and subsequent selective erase operations performed on one display cell of each pixel is different from the number of times of second and subsequent selective erase operations performed on another display cell emitting light of different color from that of the one display cell.

Abstract: Provided are a plasma display apparatus and a driving method thereof. The apparatus comprises a plasma display panel comprising a plurality of scan electrodes, and a scan driver. The scan driver drives the plurality of scan electrodes, divides the plurality of scan electrodes into a plurality of scan electrode groups, and distinguishes a level of reset pulse supplied to at least one of the plurality of scan electrode groups from a level of reset pulse supplied to the others of the plurality of scan electrode groups.

Abstract: A plasma display panel includes first display electrodes and second display electrodes positioned inside barriers while opposing each other. A front panel has closed-type barriers to increase fluorescent substance application area. A rear panel has stripe-type barriers to lower address voltage between the first display electrodes and address electrodes and improve emission efficiency by means of long-gap discharge. The plasma display panel uses trigger discharge during address discharge and sustain discharge to lower discharge voltage.

Abstract: The present invention provides a plasma display apparatus comprising a second driver supplying a first bias signal with a voltage maintained at a first bias voltage in a reset period and an address period, a first sustain rising signal that gradually rises from the first bias voltage to a second bias voltage, and a second bias signal with a voltage maintained at the second bias voltage, to the second electrode.

Abstract: Provided is a plasma display apparatus. The apparatus comprises: a plasma display panel; an energy storing unit supplying or recovering energy; an energy supply controller forming a path for supplying the energy from the energy storing unit; a first resonance unit supplying the energy supplied from the energy supply controller, to the plasma display panel through resonance; a second resonance unit forming the resonance together with the first resonance unit, and recovering the energy from the plasma display panel to the energy storing unit; and an energy recovery controller positioned between the first resonance unit and the second resonance unit, and forming a path for recovering the energy.

Abstract: The present invention relates to a plasma display apparatus and driving method thereof. According to the present invention, the plasma display apparatus includes a plasma display panel in which scan electrodes and sustain electrodes are formed, and a scan driving unit that applies a scan voltage and a sustain voltage whose absolute values are the same to the scan electrodes, wherein the sustain electrodes are kept to the ground.

Abstract: A field emission display apparatus including a field emission display panel and a driving device for the field emission display panel. The driving device includes a power supply unit, the power supply unit including an abnormal current detection unit and a discharge circuit. The abnormal current detection unit generates an arc-current detection signal when the value of a current flowing between a negative anode voltage terminal of the field emission display panel and a common ground line is larger than an upper limit. The discharge circuit generates a short circuit between an anode plate of the field emission display panel and the negative anode voltage terminal when the arc-current detection signal is generated from the abnormal current detection unit.

Abstract: Set-up, write, sustain and erase pulses are variously applied to a plasma display panel using a staircase waveform in which the rising or falling portion is in at least two steps. These staircase waveforms can be realized by adding at least two pulses. Use of such waveforms for the set-up, write and erase pulses improves contrast, and use for the sustain pulses reduces screen flicker and improves luminous efficiency. This is of particular use in driving high definition plasma display panels to achieve high image quality and high luminance.

Abstract: A method for adjusting an image on the basis of characteristics of a display system is provided. The image includes M horizontal lines. Each of the M horizontal lines respectively includes N pixels. Each pixel has an original gray level. A look-up table previously stores a plurality of conversion coefficients related to the characteristics of the display system. The method first calculates an ith loading according to the N original gray levels of the N pixels in the ith horizontal line. Based on the ith loading, an ith conversion coefficient corresponding to the ith loading is selected from the plurality of conversion coefficients in the look-up table. The method respectively multiplies the N original gray levels of the N pixels in the ith horizontal line by the ith conversion coefficient to generate N new gray levels for the N pixels in the ith horizontal line, whereby the image is adjusted.

Abstract: There is explained a plasma display panel that is adaptive for improving brightness uniformity of an entire panel. A plasma display panel according to an embodiment of the present invention has a width, a thickness and a gap of a driving electrode, barrier ribs, a black matrix and a dielectric layer etc. in a central area set differently from those in a peripheral area of the plasma display panel.

Abstract: The present invention relates to a plasma display panel, and more particularly, to a method of driving a plasma display panel. According to an embodiment of the present invention, a method of driving a plasma display panel in which one frame comprises a plurality of sub-fields and which represent a gray level by making the sub-fields emitting light according to brightness weights allocated to the sub-fields, includes a step of implementing a specific gray level using a previous or next luminous pattern of the specific gray level in representing the specific gray level where none of the sub-fields of a one-step lower gray level are luminous. The method of driving a plasma display panel according to the present invention enables to prevent electric discharge failure and to stably display images on the PDP of high-density Xe.

Abstract: Set-up, write, sustain and erase pulses are variously applied to a plasma display panel using a staircase waveform in which the rising or falling portion is in at least two steps. These staircase waveforms can be realized by adding at least two pulses. Use of such waveforms for the set-up, write and erase pulses improves contrast, and use for the sustain pulses reduces screen flicker and improves luminous efficiency. This is of particular use in driving high definition plasma display panels to achieve high image quality and high luminance.

Abstract: A method for driving an AC type surface-discharge display device which has cells arranged in a matrix. Each of the cells has at least three electrodes including a pair of main electrodes on every line of the matrix and an address electrode on every column of the matrix. The method includes providing an address preparation period applying a charge producing pulse and applying a charge adjusting pulse. The charge adjusting pulse has a waveform monotonously falling from a reference potential and a negative polarity and is applied to the second main electrode used as a scan electrode and generates feeble electric discharges between the first and second main electrodes. The feeble electric discharges are accompanied by a decrease of the wall voltage formed by the charge producing pulse.

Abstract: An apparatus for driving an interlaced plasma display panel (PDP), including a delay device, an image upper and lower edge detection device, an image border processing device, an image processing and analog control loop. The delay device receives an image signal, delays the image signal for two fields and outputs the delayed image signal. The image upper and lower edge detection device receives and analyzes the image signal, outputs the image upper and lower edge positions, saves and provides the odd field upper and lower edge data of the image signal. The image border processing device outputs the image signal after border processing according to the delayed image signal, the image upper and lower edge positions, the odd field upper and lower data. The image processing and analog control loop outputs a driving signal according to the image signal after border processing and the image upper and lower edge positions.

Abstract: Provided are an organic electroluminescence display device and method of fabricating the same. An organic electroluminescence display device according to the present invention includes a first substrate; a plurality of data lines arranged in a first direction on the first substrate; a plurality of gate lines arranged in a second direction on the first substrate; a plurality of pixel regions defined by the gate lines and the data lines, wherein a first pixel line is defined as a line of the pixel regions arranged in the first direction and a second pixel line is defined as a line of the pixel regions arranged in the second direction; a thin film transistor in each pixel region; a plurality of first connecting lines electrically connecting the thin film transistors of the first pixel lines with each other; and a second connecting line electrically connecting the thin film transistor of at least one of the second pixel lines.

Abstract: A high-potential output stage includes an output circuit to power a load with a variable high potential when it receives a low-level active input logic signal. It also includes a driving circuit which produces a high-level control logic signal as a function of the input logic signal to drive the output circuit which is powered by a DC high potential. The output stage also synchronizes the input logic signal with variations of the variable high potential.

Abstract: A plasma display apparatus is disclosed. The plasma display apparatus includes a plasma display panel comprising a scan electrode and a sustain electrode. When an image displayed on the plasma display apparatus is a fixed image pattern which has a rate of change equal to or less than a threshold rate of change in input image data and is displayed as a picture for a duration equal to or more than a threshold duration of time, the number of sustain pulses or a magnitude of a voltage of a sustain pulse supplied to at least one of the scan electrode or the sustain electrode in a sustain period of a subfield subsequent to the threshold duration of time is controlled.

Abstract: A method for prolonging the life span of a planar light source generating apparatus is provided. The planar light source generating apparatus forms an emitting layer not only on a plurality of cathodes but on a plurality of gates as well. Moreover, an anode of the planar light source generating apparatus is electrically connected to a current sensor for reading out a maximum current density when the planar light source generating apparatus operates. To operate the planar light source generating apparatus, a DC square voltage is applied to the cathodes (or gates) while the gates (or the cathodes) are electrically connected to a ground. Once the current density detected by the current sensor drops to a definite ratio of the maximum value, the external voltage supplying the aforementioned cathodes and the gates are switched. Thus, the life span of the planar light source generating apparatus is prolonged.

Abstract: An operation of reducing a voltage at a scan electrode by as much as a predetermined voltage and floating the scan electrode is repeatedly performed in a reset period of a plasma display panel. When the voltage at the scan electrode is reduced and a discharge is generated, a discharge extinction is generated when the scan electrode is floated, and the voltage at the scan electrode increases. At this time, the voltage increase of the scan electrode is applied and the voltage at the scan electrode is greatly reduced when the voltage at the scan electrode is subsequently reduced.

Abstract: Set-up, write, sustain and erase pulses are variously applied to a plasma display panel using a staircase waveform in which the rising or falling portion is in at least two steps. These staircase waveforms can be realized-by adding at least two pulses. Use of such waveforms for the set-up, write and erase pulses improves contrast, and use for the sustain pulses reduces screen flicker and improves luminous efficiency. This is of particular use in driving high definition plasma display panels to achieve high image quality and high luminance.

Abstract: Set-up, write, sustain and erase pulses are variously applied to a plasma display panel using a staircase waveform in which the rising or falling portion is in at least two steps. These staircase waveforms can be realized by adding at least two pulses. Use of such waveforms for the set-up, write and erase pulses improves contrast, and use for the sustain pulses reduces screen flicker and improves luminous efficiency. This is of particular use in driving high definition plasma display panels to achieve high image quality and high luminance.

Abstract: Driving a plasma display panel, in which generation of a region having brightness non-uniformity can be reduced over an entire screen without changing the voltage and pulse width of sustain pulses, to enable suppression of an increase in power consumption. This driving of the plasma display panel comprises (i) an initialization period for forming a discharge cell at an intersection where a scan electrode and a sustain electrode meet a data electrode and generating initialization discharge in the cell, (ii) a writing period for generating writing discharge in the discharge cell, and (iii) a sustain period for generating sustain discharge by alternately applying sustain pulses to the scan electrode and sustain electrode of the discharge cell. The rise time of the sustain pulses applied to the scan electrode and sustain electrode during the sustain period is shortened at a frequency of once every several times.

Abstract: An air purifier includes a main body defining an air passage therein to allow sucked air to pass therethrough prior to being discharged, and a first filter installed in the main body to be switched between a closed state and an open state. The first filter removes contaminants from the sucked air in the closed state, and allows the sucked air to pass through the air passage in the open state. The air purifier may include a main body to suck and discharge air, with a bypass passage formed in the main body so that the bypass passage is opened or closed by a door, and a first filter installed in the main body. The sucked air passes through the first filter prior to being discharged when the door is closed, and passes through the bypass passage prior to being discharged when the door is opened.

Abstract: A plasma display apparatus and a driving method thereof are disclosed. The plasma display apparatus comprises a plasma display panel in which a plurality of electrodes are formed, an energy storage unit for storing energy applied to the electrodes, and a protector for maintaining a voltage level of the energy stored in the energy storage unit at a predetermined voltage range.

Abstract: This document relates to a display apparatus, and more particularly, to an image processing apparatus and method of a plasma display panel. An image processing apparatus of a plasma display panel according to an embodiment of the present invention comprises an inverse gamma correction unit that gamma-corrects an image signal through previous stored gamma data, a half-toning unit that adds an error diffusion error value (Ei) of neighboring pixels to a noise value (n(i, j)) of a predetermined pattern and diffuses the added result into the inverse gamma corrected image signal, and a sub-field mapping unit that maps the half-toned image signal to a sub-field mapping table.

Abstract: A single-sided driver used with a display panel and a method of designing the same. The single-sided driver used with a display panel includes a single-sided driver circuit having predetermined circuit elements including energy accumulation elements and switching elements, and establishes current flow paths to generate predetermined driving voltage waveforms required for both X and Y axes electrodes, according to predetermined switching sequences to drive the display panel.

Abstract: An optical filter and a plasma display device having the same is provided. The optical filter includes a support layer. A photochromic pattern has pattern elements spaced apart on a surface of the support layer and has a light transmission characteristic wherein light transmission is changeable according to the intensity of external light.

Abstract: A Plasma Display Panel (PDP) driven by a voltage of a driving waveform causing a stable discharge, by which electrodes are disposed to surround sides of a discharge cell to efficiently utilize discharge space, thereby improving light-emitting efficiency, and a voltage of a falling ramp type pulse waveform is supplied to an electrode to which a reset pulse is supplied during an initial reset stage, thereby improving its ability to control a wall voltage which is accumulated around each of the electrodes and is disposed on sides of the discharge cell.

Abstract: The present invention relates to a plasma display apparatus and method for driving the same. According to the present invention, the plasma display apparatus includes a plasma display panel having a first electrode and a second electrode, and a third electrode which is crossed with the first electrode and the second electrode, a scan driving unit for applying a sustain pulse, which rises from a first bias voltage of the negative polarity up to a sustain voltage, to the first electrode, and a sustain driving unit for applying a sustain pulse, which rises from a second bias voltage of the negative polarity up to a sustain voltage, to the second electrode in an alternate manner with the sustain pulse applied by the scan driving unit.

Abstract: A plasma display panel includes scan electrode lines, sustain electrode lines and data electrode lines formed within a display area. A common electrode line is formed along a side of the device at a non-display area and is commonly connected to the sustain electrode lines. A first pad portion is formed at a non-display area on a side of the device, and wires carrying scan signals are connected to the scan electrode lines at the first pad portion. A second pad portion is also formed at a non-display area on either a side edge, an upper edge or a bottom edge of the device, and a conductive path carries a sustain signal to the common line through the second pad portion.

Abstract: A plasma display panel includes a first substrate and a second substrate provided opposing one another with a predetermined gap therebetween. A plurality of barrier ribs are mounted in the gap between the first and second substrates to define a plurality of discharge cells. A plurality of phosphor layers are respectively formed in the discharge cells. A plurality of display electrodes are formed on the first substrate along a first direction, and a plurality of address electrodes are formed on the first substrate along a second direction which intersects the first direction and separated from the display electrodes.

Abstract: A plasma display device including first and second electrodes and a driving circuit alternately applying first and second voltages to the first and second electrodes. The driving circuit includes a power recovery unit, a sustain discharge voltage supply, and a gate voltage supply. The power recovery unit includes an inductor coupled between the first electrode and a capacitor, and increases/decreases the voltage of the first electrode by electrically coupling the inductor and the capacitor. The sustain discharge voltage supply includes a first transistor and a second transistor that couple the first electrode to a supply voltage and to ground. In case of damage to a circuit element, a current is established, through a Zener diode, coupled between the capacitor and the gate voltage supply, that disconnects the supply of voltage to gate drivers of the circuit transistors and stops the operation of the driving circuit.

Abstract: A plasma display apparatus comprising a connector is provided. The plasma display apparatus comprises a plasma display panel comprising an electrode of a predetermined width and a connector comprising an electrode line of a width narrower than the predetermined width of the electrode to supply a driving signal to the electrode. A distance between the electrode line and an adjacent electrode line is longer than a distance between the electrode and an adjacent electrode.

Abstract: When driving a plasma display panel, in a first subfield of a first frame, turn-on cells are selected among cells of a first group of electrodes by performing an address operation for the first group, and a sustain discharge is performed for selected cells, and turn-on cells are selected among cells of a second group of electrodes by performing an address operation for the second group, and a sustain discharge is performed for selected cells. In a first subfield of a second frame, turn-on cells are selected among cells of the second group by performing an address operation for the second group, and a sustain discharge is performed for selected cells, and turn-on cells are selected among cells of the first group by performing an address operation for the first group, and a sustain discharge is performed for selected cells.

Abstract: A plasma display device includes a plasma display panel having discharge cells formed between a plurality of first electrodes and a plurality of second electrodes and a driving circuit dividing one frame into a plurality of subfields, each subfield including a reset period, an address period, and a sustain period, and applying a driving voltage to the first electrodes and the second electrodes. During a sustain period of each subfield, a sustain discharge pulse is alternately applied to the first and second electrodes for triggering a sustain discharge. A width of a last sustain discharge pulse applied to the second electrode is set to be greater than a width of other sustain discharge pulses for selected subfields. The subfields may be selected based on whether a total number of the sustain discharge pulses during the sustain period is less than a critical number of sustain discharge pulses.

Abstract: There is provided a light emitting device capable of preventing light emission of an OLED caused due to an off current of a driver TFT and suppressing a reduction in a contrast, to thereby display a beautiful image. A wiring which is kept at a predetermined potential (hereinafter referred to as a discharge line) is provided to make the off current flow into the discharge line rather than into the OLED. A TFT such as is turned on when the driver TFT is tuned off (hereinafter referred to as a discharging TFT) is provided in each pixel. With respect to the source region and the drain region of the discharging TFT, one is connected with a pixel electrode and the other is connected with the discharge line. According to the above structure, when the driver TFT is turned off, the discharging TFT is turned on. Thus, the off current in the driver TFT actively flows into the discharge line rather than into the OLED.

Abstract: A plasma display device in which in a sustain period for each subfield, a time point to clamp to a second potential a sustain pulse belonging to a first group including a sustain pulse to be first applied is delayed comparing to a time point to clamp to the second potential a sustain pulse belonging to other groups.

Abstract: A Plasma Display Panel (PDP) having enhanced efficiency includes: first and second substrates arranged facing each other and defining a space therebetween partitioned into at least one discharge cell; a phosphor layer arranged in the at least one discharge cell; an address electrode arranged along a first direction in the space between the first and second substrates; and first and second electrodes electrically insulated from the address electrode and arranged along a second direction crossing the first direction at opposite sides of each of the at least one discharge cells in the space between the first and second substrates. At least one of the first and second electrodes includes a plurality of electrode portions that are separate from each other.

Abstract: In a Plasma Display Device (PDP) and driving method thereof to reduce Electro Magnetic Interference (EMI), address electrodes are divided according to colors controlled by the address electrodes in the address period and voltages are supplied to the electrodes at different times to reduce EMI, and red, green, and blue discharge cells are controlled to concurrently emit light to display natural colors clearly.

Abstract: A plasma display panel that permits a high-speed addressing. In the panel, scanning/sustaining electrodes are provided at each discharge cell. Common sustaining electrodes are arranged in parallel to the scanning/sustaining electrodes at each discharge cell. At least two dummy electrodes are provided at the non-display area to supply the non-display area with charged particles in the address interval.

Abstract: A PDP apparatus in which a large-sized plasma display panel, whose electrodes have large drive requirements, is driven by using already existing driver ICs, and a PDP apparatus in which the operating conditions when a plasma display panel is driven by using a plurality of driver ICs have been improved, are disclosed. According to a first aspect, one electrode of the plasma display panel is driven by combining a plurality of drive signals output from the driver IC and, according to a second aspect, in a configuration in which a plurality of electrodes are driven by a plurality of identical driver ICs, when some of a plurality of outputs of the driver ICs are not connected to the electrodes and not used, the unused outputs are distributed in each driver IC as evenly as possible.

Abstract: A plasma display panel exhibiting a reduced discharge firing voltage and/or improved luminescence efficiency is disclosed. In one embodiment, the plasma display panel includes first and second substrates facing each other with a predetermined gap such that a plurality of discharge cells are formed in a space therebetween, wherein each discharge cell comprises an address electrode elongated in a first direction, a pair of first electrodes elongated in a second direction crossing the first direction, and a pair of second electrodes elongated in a second direction, and wherein each discharge cell includes a pair of discharge spaces, the pair of first electrodes are disposed at opposite sides of the each discharge cell, and the pair of second electrodes are disposed substantially at a center of the discharge cell, between the pair of first electrodes, and parallel with each other.

Abstract: A driving method of a surface discharge plasma display panel includes a resetting step, an addressing step and a sustained discharging step. In the resetting step, a first voltage is applied between the scan electrodes and the address electrodes to accumulate wall charges in the respective pixel by a facing discharge, and the wall-charges accumulated by the facing discharge are removed. In the addressing step, a second voltage is applied between a corresponding scan electrodes and selected address electrodes so that a facing discharge occurs, to form wall-charges in the selected pixels. In the sustained discharging step, a third alternating-current voltage is applied between the scan electrodes and the common electrodes so that a surface discharge occurs in the selected pixels.