Abstract: The invention provides a flat display device which comprises for pixels arranged along drive lines a voltage drop calculator 27 for calculating a voltage drop occurring in accordance with the position of each pixel, and a video signal converter 30 and a lookup table 31 for correcting the input signal to be supplied to the pixel in accordance with the magnitude of the calculated voltage drop, whereby crosstalk due to the voltage drop is prevented.

Abstract: Scanning electrodes are shared between adjacent display lines. Sustaining electrodes are disposed between the scanning electrodes by two. The sustaining electrodes form display lines by gaps with adjacent scanning electrodes. The sustaining electrodes are separated into a first sustaining electrode group in which a plurality of sustaining electrodes disposed at the one side of the scanning electrode are commonly connected and a second sustaining electrode group in which a plurality of sustaining electrodes disposed at the other side of the scanning electrode are commonly connected to be independently driven.

Abstract: Power saving is more realized when a partial display is executed in active matrix type EL display elements. When the partial display is executed, a scan driver 2 repeatedly scans all the scan lines as executed ordinarily. In contrast, when a scan shifts from a display region to a non-display region, black display data is captured by a shift resister 1a in a data driver 1 for one horizontal period and latched by a latch circuit 1b. Then, while the non-display region is being scanned, the drive of the data driver 1 is stopped. Accordingly, in the scan of the non-display region, a non-display state is achieved by the black display data latched by the latch circuit 1b. Low power consumption can be realized because the drive of the data driver 1 operating at a high speed is stopped while the non-display region is being scanned.

Abstract: An electroluminescence display device has a plurality of electroluminescence elements and a driver circuit formed over a substrate. At least a part of the driver circuit is disposed in a display portion of a substrate in order that the size of the display device can be reduced.

Abstract: A driving method of a plasma display panel for achieving a high-quality image display by preventing an erroneous discharge light emission between row electrodes during a light emission sustaining step. In each subfield, a pixel data writing step and the light emission sustaining step are performed, and an address pulse, having the same polarity as the polarity of a sustain pulse first applied during the light emission sustaining step, is applied to the respective column electrodes concurrently with the first-applied sustain pulse.

Abstract: The present invention provides a plasma display driving device capable of enhancing contrast by adjusting in accordance with the ambient illuminance of a plasma display panel the level change rate at the leading edge portion of a resetting pulse for causing the occurrence of a resetting discharge, which initializes all the discharge cells of the plasma display panel. The present invention also provides a plasma display panel driving method for enabling power consumption to be held in check by changing the number of sustaining pulses per unit time to be applied to each discharge cell in an emission sustaining step in accordance with the ambient illuminance of the plasma display panel, and, in addition, by adjusting the pulse width of at the least one of the above-mentioned sustaining pulse and scanning pulse for pixel data writing.

Abstract: A power supply device for displaying includes a set register for setting an amplitude and voltage level of a driving voltage for a common electrode and an amplitude and voltage level of a non-selecting period voltage for a scan line, an amplitude reference generating circuit for generating an amplitude reference voltage for the driving voltage of the common electrode and for the non-selecting period voltage of the scan line according to a set value, a VcomH reference generating circuit and a VcomL generating circuit for A.C. driving the common electrode with an amplitude and voltage level determined by the amplitude reference voltage and set value, a VgoffH generating circuit and a VgoffL reference generating circuit for generating the non-selecting period voltage of the scan line with an amplitude and voltage level determined by the amplitude reference voltage and set value.

Abstract: To provide an electronic device capable of suppressing a luminous amount of an EL element and realizing a large number of gray-scale levels. The electronic device is characterized in that the luminescence of the EL element is controlled by a pair of EL driver TFTs, one of the pair of EL driver TFTs is controlled by one of the pair of switching TFTs and one of the pair of eliminating TFTs, the other of the pair of EL driver TFTs is controlled by the other of the pair of switching TFTs and the other of the eliminating TFTs, and gray-scale display is performed by controlling the luminescence time of the EL elements.

Abstract: A display and a driving method of a display panel capable of improving a dark contrast.

Abstract: Control method and system for improving the color temperature of an alternating current (AC) plasma display panel (PDP) are disclosed. The method and apparatus controls the color temperature of an AC PDP, and can maintain high luminance and luminous efficiency even in an XGA class discharge cell as well as a VGA class discharge cell because a discharge space is dispersed from a sustain electrode to the direction of a writing electrode, to thus obtain strong sustain discharge having a large discharge space when a pulse is simultaneously applied to the writing electrode while a sustain pulse waveform is applied during a sustain period of the AC PDP, improves only the bright of a blue cell whose luminance is relatively low regardless of a cell structure because different pulses can be independently applied to the writing electrodes of red, blue, and green cells during the application of the sustain pulse, and controls a color temperature by increasing the luminance of the blue and green cells.

Abstract: A driving circuit of a display for preventing electrostatic discharge is provided. In the display, the anode of a light-emitting device in every pair of neighboring pixels is connected through a high resistant resistor (the resistance of the resistor depends on the material constituting the light-emitting device and size of the pixel). Any static electric charges produced during fabrication are even distributed to all the pixels and hence charges no longer accumulate at the anode of the light-emitting device leading to point defects in the display.

Abstract: An active matrix LCD using two-terminal non-linear elements as switching elements is disclosed. This new kind of active matrix LCD comprises a matrix of pixel elements, and each pixel element comprises a first two-terminal non-linear element (5), a second two-terminal non-linear element (5′), and a capacitor (8) for holding the voltage on the LCD cell. When both the first and the second two-terminal non-linear elements are in the conducting state, the voltage on the capacitor (8) can be changed. When both the first and the second two-terminal non-linear elements are in the non-conducting state, the voltage on the capacitor (8) can be maintained. To improve the display uniformity of an active matrix LCD based on two-terminal non-linear elements, the display characteristics of each pixel is measured and stored in a calibration memory (70), and the correct driving parameters for each pixel are calculated based on the display characteristics of the pixel fetched from the calibration memory (70).

Abstract: A plasma display panel (PDP) comprises a front substrate, a rear substrate, an addressing electrode, a common electrode, a first scan electrode, a second scan electrode, a first sustain electrode, and a second sustain electrode. The front substrate and a rear substrate are disposed apart in parallel, wherein a gas is filled there between. The addressing electrode positioned on the front substrate and the common electrode is positioned on the rear substrate and is orthogonal to the address electrode. The first scan electrode and the second scan electrode are positioned on the rear substrate, and are respectively at the first side and the second side of the common electrode. The first sustain electrode and the second sustain electrode are positioned on the rear substrate, and are respectively at the first side and the second side of the common electrode. A first pixel unit is defined by the address electrode, the common electrode, the first scan electrode, and the first sustain electrode.

Abstract: A method for driving a plasma display panel, by alternately applying a first voltage and a second voltage to a panel capacitor formed between a first electrode and a second electrode. A first switch and a second switch coupled between a first terminal of the panel capacitor and a first power source for supplying the first voltage are turned off. A second voltage is applied to the first terminal of the panel capacitor. A first electric path between a contact of the first switch and the second switch, and a third voltage is formed. The third voltage being a voltage between the first voltage and the second voltage, where a first capacitor formed between both terminals of the first switch has a lower capacitance than a second capacitor formed between both terminals of the second switch.

Abstract: A main object of the present invention is to provide a display that makes it easy to supply a large current to each pixel constituted by a current driven type light emitting element, and an electronic device equipped with the display.

Abstract: An organic electroluminescent device (“OELD”) has a controllable brightness, an improved energy efficiency, and stable optical output at low brightness. The OELD is activated with a series of voltage pulses, each of which has a maximum voltage value that corresponds to the maximum power efficiency when the OELD is activated. The frequency of the pulses, or the duty cycle, or both are chosen to provide the desired average brightness.

Abstract: A pixel structure for an active matrix OLED. A first switching transistor has a control terminal coupled to a first scan line, and a first terminal coupled to a data line. A first P-type transistor has a drain and a gate coupled to each other, and a source coupled to a voltage source. The drain is also coupled to a second terminal of the first switching transistor. A second P-type transistor has a source coupled to the voltage source, and a second switching transistor has two terminals coupled between gates of the first and second P-type transistors, and a control terminal coupled to a second scan line. A storage capacitor is coupled between the voltage source and the gate of the second P-type transistor. An OLED has an anode coupled to the drain of the second P-type transistor and a cathode coupled to ground.

Abstract: A multiplex anode driver circuit is provided that enables a reduced RAM capacity, an improved speed, and slimmed hardware. The multiplex anode driver circuit outputs anode data in sync with the timing when two adjacent grids are sequentially scanned in the direction of a row of anodes. The anode driver circuit has the shift register allocated with an even-numbered grid timing and the shift register allocated with an odd-numbered grid timing, in a two system. In the shift register, the registers are connected to the latch circuits, which hold anode data of the registers. In the shift register, the registers are connected to the latch circuits which hold anode data of the registers. The blanking input to the latch circuit associated with the shift register and the blanking input to the latch circuit associated with the shift register are released alternatively while the even-numbered grid timing and the odd-numbered grid timing are selected. Thus, anode data is transferred to the memory.

Abstract: A drive circuit of an active matrix type organic EL display panel includes a drive current generator circuit for generating drive currents corresponding to the red, green and blue colors in a predetermined sequence in response to a RGB switching signal and a current switching circuit having a first, second and third output terminals corresponding to the respective red, green and blue colors, the current switching circuit adapted to select one of the first, second and third output terminals in the predetermined sequence in response to the RGB switching signal, generate currents for charging the capacitors of the pixel circuits for the red, green and blue colors in response to the drive currents and output the charging current to the output terminals.

Abstract: A white light-emitting organic electroluminescent element for a backlight and a liquid crystal display device using the same. The white light-emitting organic electroluminescent element is useful for a backlight, in which two or three color light-emitting layers are laminated in the form of a thin film, and the liquid crystal display device reproduces natural color tones, resulting from formation of the element at the rear of a liquid crystal display panel. The white light-emitting organic electroluminescent element comprises an anode; a hole injecting layer; a hole transporting layer; an organic electroluminescent layer consisting of two or three color light-emitting layers and one or more controlling layers, the controlling layer being made of a blocking material for controlling the stream of electrons between the light-emitting layers; an electron transporting layer; and a cathode.

Abstract: An electro-luminescence panel that is capable of improving brightness. In the panel, a single of compensation circuit is configured for a single of gate lines. Accordingly, the panel can considerably improve an aperture ratio in comparison to the existent electro-luminescence panel adopting a compensation circuit for each pixel. Also, it can improve a throughput and eliminate a stripe occurring at the pixel cell.

Abstract: There is provided a shift register in which multiple stages are connected one after another to each other, the multiple stages having a first stage in which a start signal is coupled to an input terminal, the shift register sequentially outputting output signals of respective stages. The multiple stages have odd stages for receiving a first clock signal, and even stages for receiving a second clock signal having a phase opposite to the first clock signal. Each of the multiple stages has a pull-up section for providing a corresponding one of the first and second clock signals to an output terminal. A pull-up driving section is connected to an input node of the pull-up section, for turning on the pull-up section in response to a front edge of an input signal and for turning off the pull-up section in response to an output signal of a next stage. A pull-down section provides a first power voltage to the output terminal.

Abstract: A plasma display panel having scanning electrodes (Y) and sustaining electrodes (X) arranged in the form of XX-YY-XX-YY . . . , a rib structure vertically crossing the scanning electrodes (Y) and sustaining electrodes (X). The priming discharges during reset period does not occur in the display areas of the plasma display panel, the picture quality is assured from avoiding the emission of over-brightness in the reset period which enables the sequential gaseous discharge operations to proceed with smaller driving voltage.

Abstract: A PDP apparatus in which degradation in image quality such as display missing points does not occur, even if the peak luminance is increased, has been disclosed. In the PDP apparatus, the display load ratio of each subfield is detected and a sustain pulse cycle is changed according to the display load ratio of each subfield. Moreover, an adaptive sustain pulse number change means is provided, which calculates the total amount of variations in time by summing the variations in time in a display field caused by the changes in the sustain pulse cycles and increases/decreases the number of sustain pulses of each subfield according to the total amount of variations in time.

Abstract: A driving circuit of an organic electro luminescence display device for reducing driving power consumption. The reduction is accomplished by constructing power voltage supplying lines on respective pixels individually and constructing common electrodes on respective pixels for individually applying common voltages to the respective pixels. Alternatively, constructing power voltage supplying lines and the common electrodes on the pixels individually, thereby supplying power voltages appropriate for the respective R, G and B pixels individually.

Abstract: An organic electroluminescent module is disclosed. The organic electroluminescent module comprises a plurality of scan lines, a plurality of data lines perpendicular to the plurality of scan lines, a plurality of light emitting diodes formed at cross regions of the plurality of scan lines and the plurality of data lines, a scan driver having inverse voltage applying transistors and ground voltage applying transistors respectively connected to the plurality of scan lines, a data driver having static current sources and ground voltage applying transistors respectively connected to the plurality of data lines, and a driver controller for controlling the scan driver and the data driver. Impurities in the organic EL module can easily be eliminated by an inverse voltage. As a result, a lifetime of the organic EL module can be prolonged and quality of display can be improved.

Abstract: A PDP driving method, at the first timing point of a reset period, a global voltage difference is applied between the sustaining electrodes and the scanning electrodes, wherein the gaseous discharge occurs only in the non-display areas, called the dark areas. Because the discharge during reset period does not occur in the display areas, the picture quality is assured from avoiding the emission of over-brightness in the reset period which enables the sequential gaseous discharge operations to proceed with smaller driving voltage.

Abstract: An organic light-emitting panel includes a data line, a scan line, a voltage applying line, a switching device, an organic light emitting device and a driving device.

Abstract: In an organic EL display, a scan driver is divided into several scan driving units, and the each scan driving unit includes a plurality of flip-flops and a plurality of buffer units each receiving an output of the flip-flop as an input. The flip-flop includes four NOR gates and the buffer unit includes an OR gate composed of a NOR gate and an inverter, and a buffer composed of two inverters. The NOR gates of the flip-flop and the buffer unit receive a clear signal and are composed of PMOS transistors. When the clear signal of high level is applied to non-operating ones of the scan driving units, outputs of the NOR gates become low level, and thereby, it is possible to remove static currents generated in output terminals of the NOR gates.

Abstract: A circuit for driving a display of current driven type, and more particularly, to circuit and method for driving a display of current driven type, in which a pre-charging static power source is provided separately for implementing a low power consumption. The circuit for driving a display of current driven type comprises an organic EL, pixel, a scan driving part for making the pixel to emit a light in response to a scan signal, a first static current source for being controlled so as to be turned on/off in response to a data enable signal, to supply a current to the pixel, a second static current source for being controlled so as to be turned on/off in response to a precharge signal, to supply a current to the pixel for precharging the pixel, and a controlling part for controlling amounts of the currents from the static current sources.

Abstract: A driving method for a flat panel display. First, an image signal is transformed to frame data. Next, characteristic data for the frame data is obtained. Next, a scanning order of the first electrodes is determining according to the characteristic data. Next, scanning electrodes are driven in the scanning order during the addressing period. Finally, the data electrodes corresponding to the first electrodes are driven to perform the addressing operation.

Abstract: A resetting method includes a line discharge step, an erasure step, and an iteration step. The line discharge step is performed during a part of a first pulse width period. During the first pulse width period since a second subfield corresponding to a first XY-electrode line pair starts after a first subfield corresponding to the first XY-electrode line pair ends, a negative voltage of a first level is applied to all X-electrode lines, and simultaneously, a positive voltage of the first level is applied to all Y-electrode lines. In the line discharge step, a negative voltage of a second level higher than the first level is applied to an X-electrode line of the first XY-electrode line pair, and simultaneously, a positive voltage of a third level higher than the first level is applied to a Y-electrode line of the first XY-electrode line pair, thereby provoking discharges in all discharge cells corresponding to the first XY-electrode line pair.

Abstract: There is provided a flat panel type display apparatus which is superior in heat radiation, withstand voltage characteristic, and the like. A flexible substrate having driving devices for driving a display body mounted thereon is provided on the back surface of a metal chassis which supports the display body at the back surface thereof. The back surfaces of substrates of the driving devices which are semiconductor integrated circuit devices are polished to remove unnecessary oxide films therefrom, and formed of metal films on the back surfaces. The driving devices are disposed on the flexible substrate with the metal films facing upward, a solder paste is coated on the surfaces of the metal films and the surfaces of grounding wiring patterns formed on the flexible substrate, and a metal plate is disposed on both members through the solder paste.

Abstract: Disclosed is an automatic power control (APC) method for a plasma display panel (PDP) including a plurality of address electrodes and a plurality of scan electrodes and sustain electrodes alternately arranged in pairs, which includes: calculating a load ratio change between current input data and previous input data; comparing the calculated load ratio change with a predetermined number of threshold values to determine to which area it belongs; determining a brightness control speed which is a time for applying a new brightness value matched with the determined area; and outputting sustain pulse information corresponding to a load ratio of current data at the determined brightness control speed. Also, the brightness control speed is shortened in the high gray, and it is lengthened in the low gray.

Abstract: A liquid crystal driving integrated circuit capable of adjusting display contrast and requiring no externally attached components. A resistor formed by four serially connected resistor elements R1 has one end connected to a reference voltage VLCD0 applied from an operational amplifier 8, and the other end connected to an external variable resistor 25 through a terminal 24. Consequently, liquid crystal driving voltages VLCD0, VLCD1, VLCD2, VLCD3, and VLCD4 can be finely adjusted not only by eleven versions of reference voltage VLCD0 in accordance with voltages at respective connection points of twelve serially connected resistor elements, but by changing the resistance of the external variable resistor 25, to thereby provide a liquid crystal driving integrated circuit 1 that can be used for a variety of general purposes. Since only one external variable resistor 25 is required and this resistor is inherently variable, there is no need to consider variation in characteristics.

Abstract: A gradation characteristic high in contrast without degrading the gradation is realized. In order to achieve this, an image display device is provided that includes: a display panel, in which (m×n) cold cathode devices are connected in matrix by m row wirings and n column wirings, a scan unit connected to the row wirings, a modulation unit connected to the column wirings, light emitting unit disposed at positions opposite to the cold cathode devices, an M-bit voltage amplitude modulation unit; and a pulse width limiting unit are disposed with respect to the M-bit image data as the modulation unit.

Abstract: A PDP driving and power recovery method. X and Y electrode voltages of a panel capacitor are maintained to be V2 and V1 volts, respectively. The Y electrode voltage is converted into V2 to store energy in the inductor, the energy stored therein is used to convert the X electrode voltage into V1, and the voltages at the X and the Y electrodes are maintained to be V1 and V2, respectively. The voltage at the X electrode is converted into V2 to store energy in the inductor, and the energy stored therein is used to convert the voltage at the Y electrode into V1.

Abstract: A light-emitting device having a higher aperture ratio in pixels than that of the prior art.

Abstract: Various bus lines are disposed in the same layer as the layer of the pixel electrode. The peripheral driving circuit is configured by using a layer below the pixel electrode, including the layer of the gate electrode, the data line and the active layer of a TFT. The HVDD bus line is superimposed on the H scanner, the VSS bus line on the HSW circuit and the V scanner, the pre-charge data bus line on the PSW circuit, and the VVDD bus line on the V scanner. This increases the flexibility of the disposition of the bus lines for supplying the source voltages to the peripheral driving circuit, leading to the reduction of the framing area.

Abstract: To provide a light emitting device without nonuniformity of luminance, a correcting circuit for correcting a video signal supplied to each pixel to alight emitting device. The correcting circuit is stored with data of a dispersion of a characteristic of a driving TFT among pixels and data of a change over time of luminance of a light emitting element. Further, by correcting a video signal inputted to the light emitting device in conformity with a characteristic of the driving TFT of each pixel and a degree of a deterioration of the light emitting element based on the over-described two data, nonuniformity of luminance caused by a deterioration of an electroluminescent layer and nonuniformity of luminance caused by dispersion of a characteristic of the driving TFT are restrained.

Abstract: It is an object of the present invention to provide an apparatus and method for evaluating an organic EL display, with which there is a simple drive circuit used for testing an organic EL display 10, evaluation of high reliability can be achieved, and an evaluation of the organic EL display 10 itself is performed prior to the installation of finished product drive circuits to the organic EL display 10, which makes it possible to suppress the decrease in yield caused by dealing with defective products due to the evaluation results.

Abstract: A PDP apparatus in which degradation in image quality such as display missing points does not occur, even if the peak luminance is increased, has been disclosed. In the PDP apparatus, the display load ratio of each subfield is detected and a sustain pulse cycle is changed according to the display load ratio of each subfield. Moreover, an adaptive sustain pulse number change means is provided, which calculates the total amount of variations in time by summing the variations in time in a display field caused by the changes in the sustain pulse cycles and increases/decreases the number of sustain pulses of each subfield according to the total amount of variations in time.

Abstract: A method for driving a plasma display panel is provided that can improve luminance and light emission efficiency of display discharge. After addressing for forming wall charge in cells to be lighted, in order to generate display discharge and following reproduction of wall charge in the cell, potential of at least one display electrode is altered so as to differ between start time point and end time point of display discharge, and potential of at least one electrode except the display electrode is altered so as to differ between the start time point and the end time point of the display discharge.

Abstract: A multiplex anode driver circuit is provided that enables a reduced RAM capacity, an improved speed, and slimmed hardware. The multiplex anode driver circuit outputs anode data in sync with the timing when two adjacent grids are sequentially scanned in the direction of a row of anodes. The anode driver circuit has the shift register allocated with an even-numbered grid timing and the shift register allocated with an odd-numbered grid timing, in a two system. In the shift register, the registers are connected to the latch circuits, which hold anode data of the registers. In the shift register, the registers are connected to the latch circuits which hold anode data of the registers. The blanking input to the latch circuit associated with the shift register and the blanking input to the latch circuit associated with the shift register are released alternatively while the even-numbered grid timing and the odd-numbered grid timing are selected. Thus, anode data is transferred to the memory.

Abstract: An electro-optical device is provided having a pixel portion with a novel structure, and in which display irregularities such as crosstalk, which develop due to a drop in voltage caused by the wiring resistance of electric current supply lines in an electro-optical device, are improved upon. Attention is drawn to the fact that during a period in which write in of a signal to a pixel from a signal line is not performed, a signal is not input to a source signal line and to a gate signal line, but are at a fixed electric potential. An electric current supply line and a source signal line, or an electric current supply line and a gate signal line, are connected through a switching transistor. A signal is input to a connection control line during a sustain period, and the connection transistor is made conductive. The source signal line or the gate signal line is therefore utilized as a pathway for supplying electric current to the EL element.

Abstract: A plasma addressing display device comprising a flat panel including a display cell having columns of signal electrodes and also including a plasma cell having rows of discharge channels, with pixels formed at intersections of the signal electrodes and the discharge channels; a scanning circuit for sequentially discharging the columns of the signal electrodes at a pre-set period to select pixels from row to row; and a signal circuit for supplying picture signals to the column of the signal electrodes to write the picture signals in the pixels of the selected row, the scanning circuit discharging each discharge channel with time shift as the discharging period allocated to the discharge channel of a previous row is partially overlapped at least with the discharging period allocated to the discharge channel of the next row to allocate a discharging period longer than the pre-set period to each discharge channel.

Abstract: The present invention provides a plasma display driving device capable of enhancing contrast by adjusting in accordance with the ambient illuminance of a plasma display panel the level change rate at the leading edge portion of a resetting pulse for causing the occurrence of a resetting discharge, which initializes all the discharge cells of the plasma display panel. The present invention also provides a plasma display panel driving method for enabling power consumption to be held in check by changing the number of sustaining pulses per unit time to be applied to each discharge cell in an emission sustaining step in accordance with the ambient illuminance of the plasma display panel, and, in addition, by adjusting the pulse width of at the least one of the above-mentioned sustaining pulse and scanning pulse for pixel data writing.

Abstract: An EL display device which can display vivid images with a good balance of the brightnesses of emitted red color, blue color, and green color light is provided. The EL display device has a plurality of pixels each containing EL elements respectively, and the EL display device performs gradation display by controlling the time during which the plurality of EL elements emit light. The EL display device is characterized in that a voltage applied to each of the EL elements differs depending upon the color displayed by the plurality of pixels each containing the EL elements respectively.

Abstract: In order to obtain a light-emitting device having a higher aperture ratio in pixels than that of the prior art, a source signal line and a current supply line to be connected with a pixel unit are switched by a switching circuit to use a common wiring line, so that the number of wiring lines in the pixel unit is reduced to realize the high aperture ratio.

Abstract: There is provided a method for controlling sustain electrodes in a plasma display panel (PDP). The method includes enabling a first sustain electrode to produce an addressing discharge, and disabling a second sustain electrode when the first sustain electrode is producing the addressing discharge. The first sustain electrode is adjacent to the second sustain electrode.