Class / Patent application number | Description | Number of patent applications / Date published |
315169400 | Gas display panel device | 18 |
20080238329 | Plasma display device and driving method thereof - A plasma display device and driving method thereof are disclosed. In the plasma display device, a wall charge state of each cell is initialized after forming a wall voltage between respective sustain electrodes by gradually decreasing a voltage of the sustain electrodes. In addition, in a sustain period, a high level sustain discharge pulse having a positive voltage and a low level sustain discharge pulse having a negative voltage are applied to the sustain electrode while maintaining a voltage of a scan electrode at a ground voltage. In this way, a maximum voltage applied to a scan electrode driver that applies the driving waveform to the scan electrode is decreased. In addition, a sustain discharge pulse is applied only to the sustain electrode, which is a common electrode, and therefore the driving waveform between each cell can be prevented from being distorted in the sustain period. | 10-02-2008 |
20080258635 | PLASMA DISPLAY AND DRIVING APPARATUS THEREOF - A plasma display is provided. The plasma display includes a plasma display panel (PDP) having first electrodes, second electrodes, and third electrodes; a power supply for supplying a first voltage, a second voltage and a third voltage; a driving circuit for driving at least one of the first electrodes; and a controller for controlling the driving of the first driving circuit. The first driving circuit includes: a first photo coupler and a second photo coupler for generating signals corresponding to logic signals from the controller; a scan integrated circuit (IC) configured to selectively apply the third voltage that is lower than either the first voltage or the second voltage; a buffer for delivering the first signal and the second signal to the scan IC; and a reset circuit for driving the buffer when the first voltage is higher than a fourth voltage. | 10-23-2008 |
20080272704 | Plasma display and driving method thereof - The present invention relates to a plasma display device and a driving method thereof. The plasma display device includes a first switch, and a second switch. The first switch has a first end electrically connected to a first power source that supplies a first voltage and a second end electrically connected to the plurality of first electrodes, and gradually increases a voltage of the plurality of first electrodes during a reset period. The second switch has a first end electrically connected to a second power source that supplies a second voltage that is less than the first voltage and a second end electrically connected to the plurality of first electrodes. The first and second switches are simultaneously turned on in the reset period. | 11-06-2008 |
20080297057 | Plasma display panel and method of driving the same - A plasma display panel (PDP) includes a first substrate and a second substrate spaced apart and facing each other, first barrier ribs between the first and second substrates to define a plurality of discharge cells, first and second discharge electrodes along a first direction between the first and second substrates, and address electrodes along a second direction between the first and second substrates, the address electrodes including bus portions and discharge portions electrically connected to the bus portions, wherein a distance along the second direction between a discharge portion of an address electrode and an adjacent first discharge electrode is shorter than a distance along the second direction between the discharge portion and an adjacent second discharge electrode. | 12-04-2008 |
20090001898 | Cold Cathode Tube Drive Device - A cold-cathode tube driving apparatus wherein the number of booster transformers has been reduced and the increase in installation space and in cost has been suppressed. This cold-cathode tube driving apparatus comprises a booster transformer ( | 01-01-2009 |
20090033232 | PLASMA DISPLAY AND VOLTAGE GENERATOR THEREOF - A plasma display device including a plasma display panel (PDP), a temperature detector for detecting temperature of the PDP, a driver for applying a driving voltage to a scan electrode, and a controller for generating a control signal to control the driver according to the temperature. The driver includes a transistor and first and second resistors. The transistor is coupled between a first power source and the scan electrode. The first power source supplies a scan voltage to the scan electrode. At least one of the first resistor and the second resistor is a variable resistor having a resistance that varies according to the control signal of the controller. A low discharge due to high temperature can be reduced or prevented, and the number of power sources of the plasma display device can be reduced. | 02-05-2009 |
20090033233 | Plasma display and its driver and driving method thereof - A plasma display includes an electrode, a first switch, a second switch, a third switch, an inductor, and a diode. The first switch is coupled to the electrode. The second switch is coupled between the electrode and a first power source to supply a first voltage. The third switch is coupled between the electrode and a second power source to supply a second voltage. The inductor is coupled between a second terminal of the first switch and a third power source to supply a third voltage. The diode is coupled in parallel with the inductor. The first switch includes a first and second transistors coupled in series, the first and second transistors being coupled back-to-back. | 02-05-2009 |
20090039792 | PLASMA DISPLAY DEVICE AND DRIVING METHOD THEREOF - A plasma display device includes a plasma display panel having a scan driver including a falling reset signal/scan low signal generating circuit that includes: a first switch coupled to a scan electrode, a second switch coupled in series with the first switch and coupled to a scan low voltage source having a scan low voltage, a first driving circuit having an output terminal coupled to a control terminal of the first switch and a ground terminal coupled to the first and second switches, a second driving circuit having an output terminal coupled to a control terminal of the second switch and a ground terminal coupled to the second switch and the scan low voltage source, a control Zener diode between the control terminals of the first and second switches, and a control resistor between the control terminal of the second switch and the scan low voltage source. | 02-12-2009 |
20090058310 | PLASMA DISPLAY PANEL DRIVE CIRCUIT AND PLASMA DISPLAY APPARATUS - A drive circuit for driving a plasma display panel (PDP) includes a pulse voltage generation circuit ( | 03-05-2009 |
20090115338 | METHOD OF DRIVING PLASMA DISPLAY PANEL AND PLASMA DISPLAY APPARATUS THEREOF - The present invention relates to a plasma display apparatus and, more particularly, to a method of driving a plasma display panel. A plasma display apparatus according to an aspect of the present invention includes a plasma display panel including a plurality of scan electrodes and sustain electrodes formed on an upper substrate, and a plurality of address electrodes formed on a lower substrate; a driver for supplying driving signals to the plurality of electrodes; and a fluorescent layer, comprising a fluorescent material, and a conductive material having conductivity higher than that of the fluorescent material, is formed on the lower substrate. The plurality of scan electrodes may be divided into first and second groups and then supplied with scan signals, and scan bias voltages supplied to the first and second groups in at least any one period of an address period may be different from each other. | 05-07-2009 |
20090134809 | PLASMA DISPLAY APPARATUS - A plasma display apparatus is disclosed. The plasma display apparatus includes a plasma display panel and a driver. The plasma display apparatus includes a scan electrode, a sustain electrode, an address electrode, a lower dielectric layer on the address electrode, and a phosphor layer on the lower dielectric layer. The phosphor layer includes a phosphor material and an additive material. The driver does not supply a sustain signal to at least one of the scan electrode and the sustain electrode during a sustain period of a first subfield of a plurality of subfields of a frame. A sustain period of at least one subfield of the plurality of subfields of the frame is omitted. | 05-28-2009 |
20090153065 | ADDRESS DRIVE CIRCUIT AND PLASMA DISPLAY APPARATUS - A circuit configuration for realizing high impedance in an address drive circuit is provided in order to reduce the number of recovery switches without reducing power recovery efficiency. A mechanism for realizing the high impedance in an address drive circuit during a sustain period of a plasma display panel is provided. By achieving the high impedance, capacitance coupling between an X electrode and an address electrode and between a Y electrode and an address electrode can be cancelled, and a power recovery circuit can be simplified without reducing the power recovery efficiency. | 06-18-2009 |
20090243500 | LCD and Backlight Module Thereof - A backlight module includes fluorescent lamps, an inverter for supplying power for the lamps, dimming circuits each connecting the lamp in series, a signal processor for converting a video signal into a dimming signal, and a control unit. The lamps are disposed as an array having more than two columns and two rows on a substrate. The control unit electrically connects the signal processor and the dimming circuit and changes the luminance of the lamps by adjusting the dimming circuit according to the dimming signal. | 10-01-2009 |
20090295297 | OPTICAL FILTER AND PLASMA DISPLAY DEVICE HAVING THE SAME - 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. | 12-03-2009 |
20100141157 | PLASMA DISPLAY DEVICE - A plasma display device having a first diode with an anode coupled to an electrode. A first switch is coupled between a cathode of the first diode and a first voltage source that supplies a first voltage. A first inductor and a second switch are coupled in series between a power recovery capacitor and the cathode of the first diode, and a third switch is coupled between the anode of the first diode and a second voltage source that supplies a second voltage lower than the first voltage. | 06-10-2010 |
20110074299 | DRIVER FOR PLASMA DISPLAY PANEL HAVING SEPARATED BOARD STRUCTURE - There is provided a driver for a plasma display panel having a separated board structure that can reduce parasitic resonance by shortening the length of a cable used for power transmission by separating a board having a Y electrode switch thereon from a board having an X electrode switch thereon. A driver for a plasma display panel having a separated board structure according to an aspect of the invention may include: a first board having a predetermined mounting area, and mounted with a power supply section having predetermined inductance and converting commercial AC power into predetermined driving power using the inductance, and a first electrode switch section, switching the driving power from a power conversion section and supplying the switched driving power to a first electrode of a plasma display panel; and a second board having a predetermined mounting area, physically separated from the first board, and mounted with a second electrode switch section receiving the driving power from the power supply section through a cable and switching the driving power to supply the switched driving power to a second electrode of the plasma display panel. | 03-31-2011 |
20110260632 | PLASMA DISPLAY DEVICE - A plasma display device includes a plasma display panel having a plurality of discharge cells, and a drive circuit for applying a driving voltage to a display electrode of this plasma display panel. One field is composed of a plurality of subfields. Each subfield includes an address period for selecting a discharge cell to be discharged and a sustain period in which a sustain discharge is carried out in the discharge cell to be selected in this address period. The plasma display panel is configured by forming a base film on the dielectric layer covering the display electrodes, and attaching a plurality of crystal particles made of metal oxide to the base film so as to be distributed over an entire surface. The drive circuit is configured so that a voltage having a pulse width of not more than 1 μs is applied to the data electrode in the address period. | 10-27-2011 |
20130313981 | PLASMA DISPLAY DEVICE - The number of components forming a scan electrode driver circuit is suppressed. For this purpose, a scan pulse generation circuit includes a first electric power supply for generating a positive voltage to be superimposed on the reference electric potential of the scan pulse generation circuit, high-voltage-side transistors for outputting the high-side voltage of the first electric power supply to scan electrodes, and low-voltage-side transistors for outputting the low-side voltage of the first electric power supply to the scan electrodes. A down-waveform generation circuit includes a second electric power supply for generating a positive voltage to be superimposed on the reference electric potential, and a Miller integration circuit that has one terminal connected to the high-voltage side of the second electric power supply and the other terminal connected to the ground electric potential. The down-waveform generation circuit generates a down-ramp waveform voltage falling to a negative voltage. | 11-28-2013 |