Abstract: An addressing mechanism for charging and discharging quasi-capacitive elements in an X-Y matrix. The addressing mechanism may be configured to toggle a resistor-capacitor (RC) time constant between large and small values such as by opening or closing a circuit path to a low impedance resistor disposed in parallel with a higher impedance in-line resistor. When this occurs, elements in the X-Y matrix can be addressed and controlled. The X-Y matrix may be comprised of multiple “rows” and “columns” of conductors where crosstalk may occur along the columns and rows. Crosstalk may be curtailed by using either hysteresis management or global control of the row's impedance along its entire length. The resulting control obviates the need for active devices at each matrix element to perform the switching functions.

Abstract: An image display apparatus of a present invention has a rear plate having a plurality of electron-emitting devices, a face plate having a light-emitting member, a high-voltage power source which applies a high voltage to the light-emitting member, a current detecting unit which detects an emission current from the electron-emitting devices, and a bypass capacitor. One end of the bypass capacitor is connected between the high-voltage power source and the current detecting unit, and the other end of the bypass capacitor is connected to a potential regulating electrode, and an electrostatic capacitance Cp of the bypass capacitor satisfies a following formula: Cp>?A/d where ?: permittivity of vacuum, A: an area of the light-emitting member, and d: a distance between the rear plate and the face plate.

Abstract: An image display device includes a display portion formed by disposing pixel circuits in a matrix, and a signal line driving circuit and a scanning line driving circuit for driving the pixel circuits through signal lines and scanning lines of the display portion. The pixel circuit includes at least: a light emitting element; a drive transistor for current-driving the light emitting element by a drive current corresponding to a gate-to-source voltage thereof; a hold capacitor composed of either one capacitor or a plurality of coupling capacitors for holding therein the gate-to-source voltage; and a write transistor adapted to be turned ON/OFF in accordance with a write signal outputted from the scanning line driving circuit, thereby setting a voltage developed across terminals of the hold capacitor at a voltage of corresponding one of the signal line.

Abstract: A knowledge-based driver is provided for powering a solid-state light source with a constant current, including a memory that stores lumens per amp and volts per amp performance characterizations of the light source over time, and a controller that operates in a test mode to estimate the light source degradation based on voltage feedback obtained at a predetermined test current value, and to adjust the drive current in normal operating mode according to the estimated device degradation to implement constant lumens control without external optical feedback components.

Abstract: A display device, comprising: an insulating substrate; a light sensor which includes a semiconductor layer disposed in a first region and a sensor input terminal and a sensor output terminal electrically connected with the semiconductor layer, and is formed on the insulating substrate; a first electrode, an organic light emitting layer and a second electrode which are sequentially formed on the light sensor; a color filter which is disposed between the insulating substrate and the first electrode, and is formed in a second region that is different from the first region; and a controller which controls a data voltage supplied to one of the first electrode and the second electrode based on an output of the light sensor.

Abstract: A driving circuit, which drives a display panel in a voltage range between a high negative voltage and a high positive voltage, includes: an electric charge discharging circuit; and a test external terminal. The electric charge discharging circuit connects a first terminal supplied with the high negative voltage to a second terminal of a ground voltage in response to a drop of a power source voltage. The test external terminal is connected to the electric charge discharging circuit. The high negative voltage is supplied to the semiconductor substrate. The electric charge discharging circuit interrupts a connection between the first terminal and the second terminal based on a control signal from the test external terminal.

Abstract: There is provided a driving circuit capable of driving current flowing in cathode electrodes with high accuracy and displaying without brightness variation. For driving a cathode electrode in a display panel, a first current mirror circuit is fabricated by connecting a gate of first FET and a gate of second FET and a second current mirror circuit is fabricated by connecting a gate of a third FET connected in series to the second FET and a gate of a fourth FET. A brightness signal controls the magnitude of current flowing in the first FET, so that the current flowing to the cathode electrode via the fourth FET can be controlled with high accuracy.

Abstract: A semiconductor device having a normal function means is provided, in which the amplitude of an output signal is prevented from being decreased even when a digital circuit using transistors having one conductivity is employed. By turning OFF a diode-connected transistor 101, the gate terminal of a first transistor 102 is brought into a floating state. At this time, the first transistor 102 is ON and its gate-source voltage is stored in a capacitor. Then, when a potential at the source terminal of the first transistor 102 is increased, a potential at the gate terminal of the first transistor 102 is increased as well by bootstrap effect. As a result, the amplitude of an output signal is prevented from being decreased.

Abstract: A drive circuit for a fluorescent display that can prevent generation of reactive power in a Zener diode used to generate a cutoff bias voltage. In one embodiment, the drive circuit operates as a single ended primary inductor converter (SEPIC) circuit and includes an input side closed circuit, an output side closed circuit, and a coupling capacitor connecting the two closed circuits. The input side closed circuit includes an input power source, a first inductor and a switching element. The output side closed circuit includes a second inductor, a diode and a second capacitor. A filament of the fluorescent display is connected to the second capacitor. One end of a Zener diode is connected to a negative potential side of the filament and the other end of the Zener diode is connected to an input power source.

Abstract: The amplitude of a potential of a signal line is decreased and a scan line driver circuit is prevented from being excessively loaded. A light-emitting device includes a light-emitting element; a first power supply line having a first potential; a second power supply line having a second potential; a first transistor for controlling a connection between the first power supply line and the light-emitting element; a second transistor, which is controlled in accordance with a video signal, whether outputting the second potential applied from the second power supply line or not; a switching element for selecting either the first potential applied from the first power supply line or the output of the second transistor; and a third transistor for selecting whether the first potential or the output of the second transistor which is selected by the switch is applied to a gate of the first transistor.

Abstract: A method for driving a plasma display device including first electrodes and second electrodes. In one embodiment, the plurality of first electrodes are divided into a plurality of groups including first and second groups. During a first period of a sustain period, a second voltage is applied to the first and second groups of the first electrodes while a first voltage is applied to the second electrodes, the second voltage being higher than the first voltage. During a second period of the sustain period, while the second voltage is applied to the second electrodes, the first voltage is applied to the first group of the first electrodes, and the first voltage is applied to the second group of the first electrodes a period of time after when the first voltage is initially applied to the first group of the first electrodes.

Abstract: Electron-emissive drive units of electron-emissive elements capable of being arranged with a smaller pitch. FET and emitter array units exist in matrix element areas partitioned by a control wiring and data wiring. An exemplary unit is composed of four emitter arrays. The control wiring and data wiring are driven by first and second drive circuits, respectively. Corresponding arrays between units are connected by selection wiring and driven by a third drive circuit. The third drive circuit drives each unit of data wiring every time the drive circuit sequentially drives the four units of control wiring, and the emitter array drive circuit drives each emitter array selection wiring every time the drive circuit sequentially drives the three units of data wiring. Electrons can be emitted in units of arrays smaller than the unit.

Abstract: A plasma display panel (PDP) driving method and a PDP gray-representing method for improving representation performance of low gray scales is disclosed. A voltage rising from a low level voltage to a reset voltage of a reset period of a subsequent subfield is applied to a scan electrode, without having a sustain period, after performing an address operation of the subfield with the minimum weight. The discharge cell selected in the address period of the minimum weight is discharged in an initial part of the gradually rising voltage.

Abstract: A display apparatus, which displays a color image by controlling the number of emissions or the intensity thereof in accordance with primary color video signals input thereto, has a detection portion and a white balance correction portion. The detection portion is used to detect the number of emissions or the intensity, and the white balance correction portion is used to correct white balance by adjusting the amplitudes of the primary color video signals in accordance with the detected number of emissions or the detected intensity. Therefore, correct white balance can be maintained regardless of the number of emissions or the intensity of emission.

Abstract: A display device includes a display unit in which display elements provided with pixel circuits are arranged so as to have a sequence of three different colors in a row direction and the colors are shifted in a column direction by 1.5 columns. A scanning line is provided in every row of the display unit, a signal line is provided in every column of the display unit, and a column control circuit outputs a display signal for every column. The positions of the pixel circuits are displaced in the row direction with respect to the arrangement of the display elements, and are thus aligned in the column direction and also connected to the signal line only on one side of the signal line. No inversion of the pixel circuit pattern occurs and variations of the circuit characteristics in every row are suppressed.

Abstract: In the case where the number of pixels is increased in a display device making use of electron source elements, a period, in which one pixel is caused to continue to emit light, shortened, and so there is caused a need of applying a high voltage between upper and lower electrodes of an electron source element in a short period. Therefore, there is caused a problem that a drive circuit is made severe in operating condition and so the display device is degraded in reliability. Two TFTs are arranged on each of pixels. Also, a time gradation system is used, in which one frame period is divided into a plurality of sub-frame periods, a light emitting or non-emitting state of each of the pixels is selected in the respective sub-frame periods, and gradation is represented by adding up periods, in which the light emitting state is selected in the respective sub-frame periods. Thus it is possible to provide a display device having a high reliability and a method of driving the same.

Abstract: A display module includes a substrate. The substrate has a plurality of pixels, a signal line, a current supply line, and a data driving circuit. The pixel includes an emitting device and an active device, wherein the emitting device include a first electrode layer, an organic emitting layer formed on the first electrode layer, and a second electrode layer formed on the organic emitting layer, and the data driving circuit is disposed between a display area and a first side of the substrate on which an external terminal is placed. A third electrode layer is provided within a sealing area disposed between the display area and a second side of the substrate, and on a layer below the passivation film, and the second electrode layer is connected to the third electrode layer through a plurality of contact holes formed above the third electrode layer.

Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.

Abstract: An organic electroluminescent display and a demultiplexer, wherein the organic electroluminescent display comprises: a plurality of pixels including a plurality of sub-pixels and displaying images corresponding to a first data current; a plurality of scan lines transmitting a scan signal to the plurality of pixels; a plurality of first data lines transmitting the first data current to the plurality of pixels; a scan driver outputting the scan signal to the plurality of scan lines; a demultiplexer comprising a plurality of sample-and-hold demultiplexing circuits; and a data driver outputting a second data current to a plurality of second data lines, wherein the demultiplexing circuit transmits the first data current, obtained by demultiplexing the second data current in sample/hold method, to the first data lines, wherein a pre-charge voltage corresponding to the second data current is previously transmitted to the first data lines before the first data current is transmitted to the first data lines.

Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.

Abstract: An image display device incorporates a group of pixels of two or more types, each pixel including a light source whose primary wavelength is specific to the type of pixel; a generating device for generating analog pixel signals to be input to the group of pixels from input digital pixel data, wherein the generating device has a converter to convert input digital pixel data into different output digital pixel data appropriate for each type of pixel where the output digital pixel data contains more bits than the input digital pixel data; and an input device for inputting the analog pixel signals to the group of pixels, each pixel including a light emission driver for driving the light source according to the analog pixel signal. An organic EL display device having individual R, G, and B light emission elements enables displaying in desired colors and controllable tones with reduced packaging area for the components of the organic EL display.

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: A method for controlling a driving circuit of a light-emitting device is disclosed. The driving circuit is utilized for transforming an input power into a driving power for the light-emitting device according to a plurality of state values. The method includes receiving the input power, outputting a first state value of the plurality of state values to the driving circuit, and outputting a second state value of the plurality of state values to the driving circuit according to variation of the input power.

Abstract: A light emitting device and an element substrate which are capable of suppressing variations in the luminance intensity of a light emitting element among pixels due to characteristic variations of a driving transistor without suppressing off-current of a switching transistor low and increasing storage capacity of a capacitor. According to the invention, a depletion mode transistor is used as a driving transistor. The gate of the driving transistor is fixed in its potential or connected to the source or drain thereof to operate in a saturation region with a constant current flow. A current controlling transistor which operates in a linear region is connected in series to the driving transistor, and a video signal for transmitting a light emission or non-emission of a pixel is inputted to the gate of the current controlling transistor through a switching transistor.

Abstract: A driving method and a driver circuit for improving the definition of display image on a plasma display device. In an initial state in an addressing discharge period, a scanning electrode is applied with a scanning base pulse at a first power supply potential. This suppresses a weak erroneous discharge between a scanning base pulse and a display data pulse. Next, the scanning electrode is applied with a scanning pulse. After the scanning pulse has been applied, the scanning electrode is applied with the scanning base pulse at a second power supply potential. In this way, the level of the scanning base pulse applied to the scanning electrode after the end of the application of the scanning pulse in the addressing discharge period is lower than the level of the scanning base pulse applied to the scanning electrode before the application of the scanning pulse.

Abstract: According to an embodiment of the present invention, a system is provided for driving at least one light-emitting diode (LED). The system includes an output terminal connectable to an anode of the LED and at which an output voltage can be provided for the LED. A driver loop, connectable to a cathode of the LED, is operable to maintain a LED current flowing through the LED at a desired level, thereby attenuating modulation error attributable to voltage variations at the cathode of the LED.

Abstract: Disclosed is an organic light emitting display device including a first substrate defining a pixel region and a non-pixel region. An organic light emitting element comprising a first electrode, an organic thin film layer and a second electrode are formed in the pixel region. A scan driver is formed in the non-pixel region. A second substrate is sealed spaced apart from the pixel region and the non-pixel region of the first substrate. A frit is formed along an edge of a non-pixel region of the second substrate, wherein the frit is formed so that it can be overlapped with a region excluding an active area of the scan driver formed in the non-pixel region.

Abstract: A power saving device includes a first power connector adapted for connecting to a power source, a second power connector adapted for connecting to a power wire of a display, an infrared sensor, an infrared coupling circuit, a wave shaping circuit, and a switch circuit connected between the first and second power connectors. The infrared sensor senses user status and initiates a user status signal. The wave shaping circuit receives the user status signal via the infrared coupling circuit and converts the user status signal to a voltage signal. The switch circuit receives the voltage signal and converts the voltage signal to a control signal to control the connection between the first power connector and the second power connector.

Abstract: In accordance with the invention, there are electron emitters, charging devices, and methods of forming them. An electron emitter array can include a plurality of nanostructures, each of the plurality of nanostructures can include a first end and a second end, wherein the first end can be connected to a first electrode and the second end can be positioned to emit electrons, and wherein each of the plurality of nanostructures can be formed of one or more of oxidation resistant metals, doped metals, metal alloys, metal oxides, doped metal oxides, and ceramics. The electron emitter array can also include a second electrode in close proximity to the first electrode, wherein one or more of the plurality of nanostructures can emit electrons in a gas upon application of an electric field between the first electrode and the second electrode.

Abstract: In accordance with the invention, there are nanoscale electron emitters, field emission light emitting devices, and methods of forming them. The nanoscale electron emitter can include a first electrode electrically connected to a first power supply and a second electrode electrically connected to a second power supply. The nanoscale electron emitter can also include a nanocylinder electron emitter array disposed over the second electrode, the nanocylinder electron emitter array having a plurality of nanocylinder electron emitters disposed in a dielectric matrix, wherein each of the plurality of nanocylinder electron emitters can include a first end connected to the second electrode and a second end positioned to emit electrons, the first end being opposite to the second end.

Abstract: A pixel includes a light emitting diode, and a switching circuit that is coupled to a data line and a compensation power source line, and includes a transistor including a control terminal, a first main terminal coupled to a power source line, and a second main terminal coupled to the light emitting diode. The switching circuit generates a control signal based on at least a voltage of a data signal transmitted through the data.

Abstract: The field emission device includes: a front substrate and a rear substrate which are disposed at a certain distance and opposite to each other; at least one or more cathode electrodes formed on the rear substrate; at least one or more gate electrodes formed to be distant from the cathode electrodes and to be insulated with the rear substrate; emitters formed on the upper surfaces of the cathode electrodes; an anode electrode formed on the front substrate toward the rear substrate side; a fluorescent layer formed on the anode electrode; a first voltage application circuit for applying an AC voltage to the anode electrode; and a second voltage application circuit for applying an AC voltage to the gate electrode, wherein the AC voltages being applied to the anode electrode and the gate electrode are synchronized.

Abstract: A display device includes: a support substrate including a display region where a plurality of display elements are arranged and a peripheral region where a drive circuit for each display element is provided in the periphery of the display region; a seal resin layer formed in at least the peripheral region; an opposed substrate bonded through the seal resin layer to the support substrate, sealing the display elements; an organic insulating film formed on the support substrate so as to insulate the drive circuit; a separation groove formed through the thickness of the organic insulating film so as to surround the display region and separate the organic insulating film into an inner portion and an outer portion; and a framelike projection formed on the opposed substrate so as to be opposed to the separation groove.

Abstract: The invention provides a pixel circuit that can cancel the influence of the mobility of a drive transistor. A drive transistor supplies to a light-emitting element, an output current dependent upon an input voltage during a certain emission period. The light-emitting element emits light with a luminance dependent upon a video signal in response to the output current supplied from the drive transistor. The pixel circuit includes a correction unit that corrects the input voltage held by a capacitive part before the emission period or at the beginning of the emission period, in order to cancel the dependence of the output current on the carrier mobility. The correction unit operates during part of a sampling period in response to control signals supplied from scan lines. Specifically, the correction unit extracts the output current from the drive transistor while the video signal is sampled, and negatively feeds back the output current to the capacitive part to thereby correct the input voltage.

Abstract: An organic electric field light-emitting display device includes: a plurality of pixel circuits, each disposed at one of the intersections between a plurality of signal lines and a plurality of scan lines, each of the pixel circuits including an organic electric field light-emitting element; a power auxiliary circumferential line electrically connected to one of two electrodes adapted to apply an electric field to the organic electric field light-emitting element, the power auxiliary circumferential line being disposed in a ring-like arrangement around the pixel arrangement region; and a plurality of dummy wirings formed on the underlying layer of the power auxiliary circumferential line between the intersections between either one of the plurality of signal lines and the plurality of scan lines and the power auxiliary circumferential line, the plurality of dummy wirings being insulated and isolated from the signal or scan line in proximity.

Abstract: Each of pixels arranged in a matrix comprises an element to be driven, a switching TFT, an element driving TFT, and a storage capacitor, and a potential shifting capacitor. The storage capacitor is connected between the gate and a source of the element driving TFT. Before a data signal is output, a precharge signal is output to a data line to turn on the element driving TFT, a set signal is output to a power supply line that is used to supply power through the turned-on element driving TFT to the element to be driven, and, before a data signal is applied to one electrode of the storage capacitor, the source of the element driving TFT and another electrode of the storage capacitor are discharged in response to the set signal to be fixed at a constant potential. By performing control as described above, the element to be driven is driven using a minimum number of circuit elements.

Abstract: A plasma display device includes a plasma display panel (PDP) and a driving method for driving the PDP. The PDP includes discharge cells that are formed by scan electrodes, sustain electrodes, and address electrodes. The driving method divides a frame of the plasma display panel into a plurality of subfields having respective weights in which gray scales are represented by a combination of the subfields. The plurality of subfields are divided into a first group and a second group. In an address period of a subfield of the first having a lowest weight subfield of the plurality of subfields, the method applies a scan voltage and an address voltage respectively to the scan electrode and the address electrode of a discharge cell to be selected from the discharge cells. The scan voltage is applied to the scan electrode and the scan electrode is floated.

Abstract: The invention provides a light-emitting device and an electronic apparatus, which are capable of preventing reduction of the amount of current flowing through light-emitting elements and which have an excellent display characteristic. Cathode wiring lines connected to a cathode are provided to surround an effective area outside the effective area where a plurality of pixels having light-emitting elements are provided. First to third power source lines connected to pixel electrodes are provided between the cathode wiring lines and the effective area.

Abstract: An electroluminescent (EL) element is connected to the power supply and is intermittently operated as a lighting device and as a brightness sensor. For this purpose, the processing unit induces the controlled AC voltage source to reduce the voltage for a short period. The current intensity is measured by current measuring devices and the corresponding measuring signal is digitized using the analog/digital converter (A/D). A processing unit uses the signal and the effective voltage to determine, by means of empirical calibration data stored in the memory or by using a calibration function, the brightness, i.e. the luminance of the light that is incident on the EL element. The processing unit associates, using desired values stored in the memory, the detected brightness with an operating voltage level which ensures the desired emission brightness of the EL element when operated as a lighting device.

Abstract: Provided is a plasma display apparatus having a plasma display panel constituted of a plurality of discharge cells, and a driver for driving the panel. The apparatus includes a scan IC (integrated circuit) having a first switch turning on to apply a first signal to the panel, and a second switch turning on to apply a second signal to the panel, wherein, when the first signal applied to the panel changes into the second signal, the first and second switches are floated between an application period of the first signal and an application period of the second signal.

Abstract: A light emitting device capable of performing signal electric current write-in operations at high speed and without dispersion in the characteristics of TFTs structuring pixels influencing the brightness of light emitting elements is provided. The gate length L of a transistor in which an electric current flows during write-in of a signal electric current is made shorter than the gate length L of a transistor in which electric current supplied to EL elements flows during light emission, and high speed write-in is thus performed by having a larger electric current flow than the electric current flowing in conventional EL elements. A converter and driver transistor (108) is used for signal write-in.

Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.

Abstract: Disclosed is a light-emitting display having a plurality of pixels wherein each pixel comprises a light-emitting device (100) having a light-emitting element layer which is formed between a first electrode and a second electrode and contains at least a light-emitting layer. An insulating layer (30) is formed between the light-emitting device (100) and a surface of a first or second substrate on the viewing side of the display, and the insulating layer (30) is provided with recesses and projections in at least one or more pixel regions, thereby forming an optical path length adjusting portion (32). By forming such an optical path length adjusting portion (32) in a pixel region, there is an increase in the interference conditions for the light emitted from the light-emitting device (100) to the outside, thereby averaging the interference.

Abstract: A pixel driving circuit for a display device in which a plurality of gate lines and data lines are arranged. The pixel circuit is disposed at an intersection between the gate lines and data lines, and includes at least two light emitting elements for emitting certain colors within a certain section; an active device commonly connected to the at least two light emitting elements to drive the at least two light emitting elements; and an power source control part connected to the active device to transmit driving control signals for the at least two light emitting elements to the active device. The active device sequentially drives the at least two light emitting elements in the certain section per a certain period of time in response to the power source signals transmitted through the power source control part, and the at least two light emitting elements are sequentially emitted.

Abstract: Provided is a method of driving an electron emission apparatus that drives the apparatus including a plurality of electron emission devices each having an electron supply layer formed of silicon, a silicon-based mixture or a compound thereof, an insulator layer formed on the electron supply layer and a thin film metal electrode formed on the insulator layer. The plurality of electron emission devices are sealed and the method includes: a driving step for supplying power between the electron supply layer and the thin film metal electrode to cause electrons to be emitted from the electron emission device and a reactivating step for applying a reactivating voltage at a level equal to or higher than an applied voltage value which causes discontinuity in differential value of the device current flowing between the electron supply layer and the thin film metal electrode with respect to the applied voltage.

Abstract: A plasma display apparatus is disclosed. The plasma display apparatus includes a plasma display panel including a scan electrode, a sustain voltage supply unit supplying a sustain voltage to the scan electrode, a scan reference voltage supply unit supplying a scan reference voltage to the scan electrode, a scan reference voltage controller that is connected between the scan reference voltage supply unit and the scan electrode and includes a resistor changing the scan reference voltage into a reset signal with a predetermined slope, a voltage storing unit that is connected between the sustain voltage supply unit and the scan reference voltage supply unit and stores the scan reference voltage, and a driving signal output unit that controls an output of a voltage supplied to the scan electrode using a single switch.

Abstract: In the case where the number of pixels is increased in a display device making use of electron source elements, a period, in which one pixel is caused to continue to emit light, shortened, and so there is caused a need of applying a high voltage between upper and lower electrodes of an electron source element in a short period. Therefore, there is caused a problem that a drive circuit is made severe in operating condition and so the display device is degraded in reliability. Two TFTs are arranged on each of pixels. Also, a time gradation system is used, in which one frame period is divided into a plurality of sub-frame periods, a light emitting or non-emitting state of each of the pixels is selected in the respective sub-frame periods, and gradation is represented by adding up periods, in which the light emitting state is selected in the respective sub-frame periods. Thus it is possible to provide a display device having a high reliability and a method of driving the same.

Abstract: To provide an image display apparatus having: an electron source; a light-emitting member for emitting a light by irradiation with electrons emitted from the electron source; an anode electrode, which is arranged being opposed to the electron source; a high-voltage generating circuit for generating a potential which rises in a predetermined period; a wiring for connecting the anode electrode to the high-voltage generating circuit; a comparator; a first circuit for applying a first potential satisfying a positive correlation with the potential on the wiring to the comparator; and a second circuit for applying a second potential, which continuously rises or rises in stepwise manner in the predetermined period, to the comparator. The comparator outputs a result of comparison between the first potential and the second potential.

Abstract: A driving device for a plasma display panel. The driving device generates rising and falling ramp signals having a respective constant slope regardless of a change in operating temperature. An optimal discharge voltage is maintained at high and low temperatures by the rising and falling ramp signals having a respective constant slope to secure an operation margin, thereby preventing a discharge degradation such as an incorrect discharge from occurring. Accordingly, this can cause the reliability of a plasma display device including the driving device to be enhanced.

Abstract: The present invention relates to a plasma display apparatus and driving method thereof. The plasma display apparatus according to an embodiment of the present invention comprises a plasma display panel comprising a scan electrode and a sustain electrode, and a driver that controls one or more of sustain pulses supplied to the scan electrode and one or more of sustain pulses supplied to the sustain electrode to be overlapped with each other.