摘要:
A field emission device, which among other things may be used within an ultra-high density storage system, is disclosed. The emitter device includes an emitter electrode, an extractor electrode, and a solid-state field controlled emitter that utilizes a Schottky metal-semiconductor junction or barrier. The Schottky metal-semiconductor barrier is formed on the emitter electrode and electrically couples with the extractor electrode such that when an electric potential is placed between the emitter electrode and the extractor electrode, a field emission of electrons is generated from an exposed surface of the semiconductor layer. Further, the Schottky metal may be selected from typical conducting layers such as platinum, gold, silver, or a conductive semiconductor layer that is able to provide a high electron pool at the barrier. The semiconductor layer placed on the Schottky metal is typically very weakly conductive of n-type and has a wide band gap in order to create conditions conducive to creating induced negative electron affinity at applied fields necessary to provide electron emission. One type of wide band-gap material can be selected from titanium dioxide or titanium nitride or other comparable materials.
摘要:
Significantly improving in the contrast ratio of a visual image display using a liquid crystal layer and a fiber optic faceplate with tilted fibers. One preferred embodiment of the visual image display includes a liquid crystal layer, a first polarizer and an optical fiber faceplate with many substantially parallel fibers. Each fiber has an axis which forms an oblique angle with the normal to the front surface of the liquid crystal layer. All the oblique angles are substantially equal to a typical oblique angle. The typical oblique angle is selected along the direction that substantially maximizes the contrast ratio of the display.
摘要:
An apparatus and method for directly overwriting data on a magnetooptic data storage medium. The apparatus includes a magnet (16) disposed adjacent to a recording medium (14) which provides a static magnetic field which interacts with the medium (14). The interaction is broadbased, having an area including multiple tracks (17) of the medium that encompass up to an entire data band. A first laser focuses a continuous laser beam (22) onto a track (17) of the recording medium within the location of the reversed magnetic field (18). This first laser beam (22) provides for erasure of the medium. A second laser focuses a pulsed laser beam (26) onto the erased track (17) within the location of the nonreversed magnetic field (20). This pulsed laser beam (26) provides for writing to the medium. Typically, the magnetic field provided by the magnet (16) is static, but its orientation changes with the distance along the data tracks (17) in that its component perpendicular to the medium (14) switches direction within the field of view of an optical system employed to focus the laser beams (22,26). The magnet (16) may be stationary, or movable such that it is positionally synchronized with the laser writing operations. The magnetic field may also be offset or contoured to compensate for motion of the medium during cool down subsequent to a writing operation. The method in accordance with the present invention includes the steps of applying a static magnetic field to a magnetooptic recording medium (14) whose magnetic field encompasses up to a full data band; focussing a first laser beam (22) onto a track (17) of the recording medium at the location of the reversed magnetic field (18) to erase the medium; and focussing a second laser beam (26) onto the erased track (17) of the recording medium at the location of the nonreversed magnetic field (20) to write to the medium.
摘要:
An optical sensor system is disclosed including a source module, a first detection module, and a second detection module. The source module includes a source housing unit having a source window member. The source module may emit a detection signal through the source window member. The first detection module and the second detection module are spaced apart from the source module.
摘要:
An electronic paper device includes a ground plane, a charge receiving layer, and a porous stand off layer disposed over the charge receiving layer. An active layer is interposed between the ground plane and the charge receiving layer, the active layer including a plurality of microcapsules containing charged pigments. A system for writing information to electronic paper is also provided.
摘要:
Printers, methods, and apparatus to reduce aerosol are disclosed. An example apparatus to reduce aerosol includes a print head to generate droplets and aerosol, and to direct the droplets toward a print substrate, a first corona wire to generate first ions having a first electrical polarity to direct the aerosol toward the print substrate, and a second corona wire to generate second ions to direct the aerosol toward the print substrate, wherein the second ions have a second electrical polarity that is opposite the first electrical polarity.
摘要:
An apparatus includes a generator electrode, a discharge electrode that has an aperture, a dielectric structure between the generator electrode and the discharge electrode, and a charge spreading structure. The dielectric structure includes a charging region under the aperture. The charge spreading structure is on a surface of the charging region facing the aperture. The charge spreading structure is electrically disconnected from the generator electrode and the discharge electrode and spreads electrical charge carriers over underlying areas of the charging region.
摘要:
Measurement devices, systems, and methods to measure a high field conductivity of a fluid are provided herein. The measurement device includes a fluid cell, a pair of electrodes, a voltage switch, and a measurement unit. The fluid cell is on an inclined plane to receive the fluid. The pair of electrodes are connected to the fluid cell. The pair of electrodes are spaced apart from one another to receive the fluid therebetween and positioned parallel to one another to pass an electrical current therethrough. The power unit provides a high voltage power supply to one electrode of the pair of electrodes. The measurement unit measures the electrical current that passes between the pair of electrodes through the fluid.
摘要:
A printing system (30, 40, 40′, 50, 50′) includes at least one ejector coupled to a reservoir (38) that is configured to contain a printing composition including a hydrocarbon having at least one unsaturated bond. The hydrocarbon is configured to at least one of polymerize or crosslink in the presence of a reactive species. The at least one ejector is configured to eject the printing composition onto a surface (34, 36, 10). The system (30, 40, 40′, 50, 50′) further includes a corona generator (32, 32′, 32″, 32′) configured to generate the reactive species in situ. The corona generator (32, 32′, 32″, 32′) is positioned with respect to the reservoir (38) such that the reactive species is exposed to the printing composition after the printing composition has been ejected onto the surface (34, 36, 10). The polymerizing and/or the cross-linking of the hydrocarbon is configured to form a polymer matrix (12) from the ejected printing composition.