Abstract: An OLED device includes a cathode, an anode, and having there between a light-emitting layer, further including, between the cathode and the light emitting layer, a first layer having a thickness of 20 nm or less and containing a fluoranthene compound including one and only one fluoranthene nucleus and having no aromatic rings annulated to the fluoranthene nucleus, the fluoranthene nucleus having independently selected aromatic groups in the 7,10-positions and a phenanthroline group in the 8-or 9-position. The OLED device desirably includes a second layer containing an alkali metal or an alkali metal compound, located between the cathode and the first layer. The OLED device can also include a polycyclic aromatic compound in the first layer or in a third layer located between the first layer and the light-emitting layer. Devices of the invention provide improvement in features such as efficiency, drive voltage, and operational stability.

Abstract: Compensating for changes in the threshold voltage of the drive transistor of an OLED drive circuit, the drive transistor includes a first electrode, second electrode, and gate electrode; connecting a first voltage source to the first electrode, and an OLED device to the second electrode and to a second voltage source; providing a test voltage to the gate electrode and connecting to the OLED drive circuit, a test circuit, that includes an adjustable current mirror causing voltage applied to the current mirror, to be at a first test level; providing a test voltage to the gate electrode of the drive transistor and connecting the test circuit to the OLED device producing a second test level after the drive transistor and the OLED device age; and using the first and second test levels to calculate changes in the voltage applied to the gate electrode of the drive transistor to compensate for drive transistor aging.

Abstract: A display panel which applies a PWM drive to a drive transistor (2) is provided. A drive transistor supplies current in accordance with its gate voltage, and the current is supplied to a light-emitting element (1) to illuminate the light emitting element. One end of a storage capacitor (6) is connected to the gate of the drive transistor, while the other end thereof is connected to a sweep line (12). A triangular wave which alternately repeats an up phase and a down phase is supplied to the sweep line in order to control an on period of the drive transistor in accordance with the gate voltage, to thereby control light emission of the light-emitting element.

Abstract: In one aspect of the present invention, a method of making an OLED device comprises providing a substrate; a first electrode, a conductive bus line over the substrate and an organic electroluminescent media over the first electrode and over the conductive bus line. A laser that operating at a predetermined wavelength and is scanned over the conductive bus line in a predetermined direction so that the conductive bus line absorbs sufficient energy to cause the ablation a portion of the organic electroluminescent media over the conductive bus line thereby forming an opening in the organic electroluminescent media. The width of the laser beam in the predetermined direction is less than four times the width of the conductive bus line; and forming a second electrode over the organic electroluminescent media, the first electrode, and through the opening in the organic electroluminescent media.

Abstract: Azatriphenylene derivatives and their use in the electron-transporting layer of an electroluminescent device that comprises an anode, a spaced-apart cathode, and at least one electron-transporting layer disposed between the spaced-apart anode and cathode. Such EL devices provide lower drive voltage, improved power efficiency, and longer operational lifetime.

Abstract: An OLED device including a transparent substrate having a first surface and a second surface, a transparent electrode layer disposed over the first surface of the substrate, a short reduction layer disposed over the transparent electrode layer, an organic light-emitting element disposed over the short reduction layer and including at least one light-emitting layer and a charge injection layer disposed over the light emitting layer, a reflective electrode layer disposed over the charge injection layer and a light extraction enhancement structure disposed over the first or second surface of the substrate; wherein the short reduction layer is a transparent film having a through-thickness resistivity of 10?9 to 102 ohm-cm2; wherein the reflective electrode layer includes Ag or Ag alloy containing more than 80% of Ag; and the total device size is larger than 10 times the substrate thickness.

Abstract: An electroluminescent (EL) device that includes a light-emitting area formed over a substrate. First and second electrodes and one or more EL unit(s) are included along with at least one light-emitting layer formed between the electrodes, wherein at least one electrode is transparent. A cover is located over the light-emitting area, and a light-scattering layer is located between the substrate and cover. The light-scattering layer includes transparent, light-scattering particles, wherein the ratio of the volume of light-scattering particles to the volume of the light-scattering layer is greater than 0.55 over a majority of the light-emitting area, wherein either the substrate or cover is transparent and transmits light emitted from the EL unit(s).

Abstract: A light-emitting diode device that includes a first group of sub-pixels each subpixel comprising a reflective electrode and a second electrode formed over a substrate with an unpatterned light-emitting layer formed between the reflective electrode and the second electrode, thus forming a first optical cavity having a first cavity length. Either the reflective or second electrode is patterned to form two or more independently-controllable, light-emitting sub-pixels. A second group of sub-pixels, each comprising a reflective electrode and a second electrode formed over the substrate. An unpatterned light-emitting layer is formed between the reflective electrode and the second electrode to comprise a second optical cavity having a second cavity length different from the first cavity length of the first optical cavity. Either the reflective or second electrode is patterned to form one or more independently-controllable, light-emitting sub-pixels.

Abstract: An OLED device comprises an anode and a cathode and located there-between a light emitting layer containing a light emitting dopant and a host comprising a monoanthracene derivative.

Abstract: An light-emitting diode device, including a substrate; and a reflective electrode and a semi-transparent electrode formed over the substrate and an unpatterned white light-emitting layer formed between the reflective electrode and the semi-transparent electrode, the reflective electrode, semi-transparent electrode, and unpatterned white-light-emitting layer forming an optical microcavity, and wherein either the reflective or semi-transparent electrodes is patterned to form a plurality of independently controllable light-emitting elements with at least one light-emitting element having no color filter. Color filters are formed over a side of the semi-transparent electrodes opposite the unpatterned white light-emitting layer in correspondence with the light-emitting elements, the color filters having at least two different colors.

Abstract: A system for the deposition of vaporized materials on a substrate is described, comprising at least first and second orientation-independent apparatuses for directing vaporized organic materials onto a substrate surface to form first and second films, each of the first and second orientation-independent apparatuses being arranged in a different relative orientation and comprising: a chamber containing a quantity of material; a permeable member at one end of the chamber with a heating element for vaporizing the material; and means for continuously feeding the material toward the permeable member as it is vaporized, whereby organic material vaporizes at a desired rate-dependent vaporization temperature at the one end of the chamber. A plurality of thin films may be deposited on a substrate using deposition apparatus in a variety of orientations. Such a design provides reduced costs and improved deposition rate control.

Abstract: Apparatus for vaporizing a particulate material, comprising a metering apparatus including: a reservoir; a housing having an internal volume and first and second openings for respectively receiving and discharging the particulate material; a rotatable shaft disposed in the internal volume, the shaft having a smooth surface and a circumferential groove for receiving particulate material from the reservoir and for discharging the particulate material; the rotatable shaft and the internal volume cooperating such that the particulate material is transported by the circumferential groove and not along the remainder of the rotatable shaft; a scraper disposed in relation to the second opening, having at its end substantially the same cross section as the groove in the rotating shaft, the scraper cooperating with the groove to dislodge particulate material retained therein, and in response to the shaft rotating, delivers metered amounts of particulate material through the second opening; to the flash evaporator.

Abstract: A method for calibrating a display device having four or more channels, including three main channels which include in their gamut a desired display white point, and one or more further channels, said display device also having one or more individual adjustment controls for each channel. The method uses a series of targets, which are each one or more activated display settings at which the luminance and chromaticity coordinates are measured and recorded.

Abstract: An active matrix electro-luminescent display system, comprising: a display composed of an array of regions of light-emitting elements, pixel driving circuits for independently controlling the current to each light-emitting element, one or more display drivers for receiving an input image signal for data to drive the pixel driving circuits and generating a converted image signal for driving the light emitting elements in each region of the display through signals provided through data lines and select lines, wherein the one or more display drivers sequentially receive the input image signal for driving the light emitting elements within each region of the array of regions, analyzes the input image signal received for each region to estimate the current that would result at, at least, one point along at least one power line providing current to each region, if employed without further modification, based upon device architecture and material and performance characteristics of device components, and sequentially

Abstract: A display area of a display panel is divided into a plurality of areas, and a current detector detects a driving current (i.e. CV current) that flows when light is emitted from an area or a block including a plurality of areas. Such current detection is repeated while sequentially changing the target area or block and a CPU detects an area that has a current value different from that of other areas (i.e. an area that requires correction) based on results of the results of current detection. A similar process is performed on smaller areas obtained by subdividing the area to find a smaller area that requires correction. Thus, a correction value is obtained for each pixel and the correction values are efficiently calculated.

Abstract: A method of compensating for changes in an OLED drive circuit, includes: providing a drive transistor; providing a first voltage source and a first switch; providing an OLED device connected to the drive transistor. Voltages are measured and used to compensate for changes in the OLED drive transistor.

Abstract: A light-emitting diode device, including a substrate; and a reflective electrode and a semi-transparent electrode formed over the substrate and an unpatterned white light-emitting layer formed between the reflective electrode and the semi-transparent electrode, the reflective electrode, semi-transparent electrode, and unpatterned white-light-emitting layer forming an optical microcavity, and wherein either the reflective or semi-transparent electrodes is patterned to form a plurality of independently controllable light-emitting elements with at least one light-emitting element having no color filter. Color filters are formed over a side of the semi-transparent electrodes opposite the unpatterned white light-emitting layer in correspondence with the light-emitting elements, the color filters having at least two different colors. Additionally, a reflected-light absorbing layer is located over all of the light-emitting elements.

Abstract: A white light-emitting microcavity light-emitting diode device including a reflective electrode and a semi-transparent electrode formed over a substrate and an unpatterned white-light-emitting layer formed between the reflective electrode and the semi-transparent electrode. The reflective electrode, semi-transparent electrode, and unpatterned white-light-emitting layer form an optical cavity, and either the reflective or semi-transparent electrode is patterned to form independently-controllable light-emitting sub-pixel elements. Color filters are formed over a side of the semi-transparent electrodes opposite the unpatterned white light-emitting-layer in correspondence with the independently-controllable light-emitting elements to form colored sub-pixels. One of the independently-controllable light-emitting element has at least two commonly-controlled portions that together emit substantially white light to form a white sub-pixel.

Abstract: An electroluminescent device including a transparent substrate, a securing layer, a light scattering layer, an electroluminescent unit including a transparent electrode layer, a light emitting element including at least one light emitting layer, and a reflecting electrode layer in that order, wherein the light scattering layer includes one monolayer of inorganic particles having an index of refraction larger than that of the light emitting layer and wherein the securing layer holds the inorganic particles in the light scattering layer.

Abstract: A method for controlling and compensating aging in an LED device includes measuring a performance change in light output of the LED device. The LED device is controlled with a first compensation algorithm derived from the measured performance change, during a first period, to effect a luminance change over time in the light output of the LED device. Subsequently, a second compensation algorithm, derived from the measured performance change, and different from the first compensation algorithm, during a second period, effects a second luminance change over time in the LED device's light output. The second luminance change over time in the second period is different from the first luminance change over time in the first period. Furthermore, the first and second periods together are less than the lifetime of the LED device.