Abstract:
An AC memory driving type self-shift type gas discharge panel prevents accidental abnormal discharges caused by deviated abnormal charges. Abnormal charges are significantly accumulated at both ends of a shift channel consisting of a regular arrangement of a write discharge cell and shift discharge cells. Therefore, conductive layers are provided adjacent to at least both ends of the shift channel in order to dissipate the abormal charges.
Abstract:
Apparatus for providing a visual information screen by means of a plurality of gas cells serially arranged along gas channels within a glass panel, having orthogonal parallel conductors in dielectric separation over the channels, wherein a single electrical input circuit is utilized to ignite a gas cell which may be serially shifted to selected gas channels and subsequently parallel shifted with other similar gas cells along the channels by electrical excitation of the conductors.
Abstract:
A gas discharge panel provides one or more shift channels for discharge spots, said shift channel (s) being composed of 2 or more electrode groups on each of a pair of substrates arranged oppositely across a discharge gap. Electrodes of each group are provided alternately and periodically on each substrate with the electrode patterns on each substrate such as to define said shift channel(s). The electrode layout eliminates the need for crossover areas in the leading out of electrodes and is very useful for realizing high resolution and low cost AC driven self-shift plasma display panels.
Abstract:
A pulse driven self-shift plasma display panel characterized by having meander type shift channels for shifting a discharge spot. Each meander type shift channel is composed of an array of discharge cells defined in the discharge gap at the crossing points of electrodes arranged on parallel substrates, the electrodes on one substrate being oriented generally transversely to those on the other substrate, and barrier structure for determining the meander route being provided. Data in the form of a discharge spot is written in at one end of a shift channel and is shifted by the pulse shift voltages with various phases over the meander route for display at the desired positions. The barrier structure may also be formed using photo-luminescent phosphor material to create desired colored display effects.
Abstract:
A gas discharge panel in which a pair of substrates each has provided thereon a plurality of buses and a plurality of electrodes regularly connected to the buses, and in which the substrates are disposed opposite to each other with a discharge gas sealing space defined therebetween. By applying switching voltages to the buses, discharge spots between pair of opposed electrodes are sequentially shifted. No cross-over parts for electrode connections are present on the substrates.
Abstract:
There is disclosed a multiple gaseous discharge display/memory panel having an electrical memory and capable of producing a visual display, the panel being characterized by an ionizable gaseous medium in a gas chamber formed by a pair of opposed dielectric material charge storage members which are respectively backed by an array of conductor (electrode) members, the conductor array behind each dielectric material member being appropriately oriented with respect to the conductor array behind the opposing dielectric material member so as to define a plurality of discrete discharge volumes constituting a discharge unit, the surface of at least one dielectric material member having at least one inorganic non-oxide aluminum compound applied thereto in an amount sufficient to provide improved panel operating characteristics, especially stable panel operating voltages which do not significantly change with panel operating time.In addition to display/memory panels comprising opposed dielectric members, it is contemplated using this invention with display/memory panels having only one insulated electrode and/or only one dielectric member such as in a monolithic type device.
Abstract:
An improved driving system and method for shifting a discharge spot from a given discharge cell to an adjacent discharge cell in an A.C. gas discharge, or plasma display, panel, having opposed sets of electrodes respectively covered with corresponding dielectric layers thereby insulated from the discharge gas space. One set of electrodes comprises common electrodes extending in parallel relationship and defining the direction of propagation of the shifted discharge spots. The other set of electrodes, spaced apart from the first set by the gas space, extends in parallel relation transversely to the first common electrodes, and comprise the shift electrodes. The shift electrodes are arranged in groups of a predetermined number in each group and a corresponding number of buses permits selective application of shift pulses to the respectively associated shift electrodes in sequence for each group and simultaneously for the successive groups. An improved operating margin for the shift function is achieved by utilizing the priming discharge effect of a given cell currently discharging, to reduce the necessary firing voltage at an adjacent discharge cell to which the current discharge spot is to be shifted, while minimizing the probability of misfiring at corresponding, remote cells energized in the same phases. An overlap pulse is applied to a discharge cell at which a discharge spot currently is established, to provide a priming discharge for the adjacent cell to which the spot is to be shifted. A shift pulse applied to the adjacent cell terminates after termination of the overlap pulse and thereby produces a lateral field between the two adjacent discharge cells whereby the space charge generated by the priming discharge is attracted to and reduces the necessary firing voltage at the adjacent cell. The duration of the overlap pulse in relation to the amplitude of the shift pulse defines an operating margin for the shift operation which is optimized over a preferred range of the overlap pulse duration.
Abstract:
There is disclosed a gas discharge device containing electrode arrays, an ionizable gaseous medium, and a phosphor excited at least in part by radiation from the gas discharge of the device, the life of the phosphor being increased by the application of a phosphor overcoat which is at least partially transmissive to excitation radiation from the gas discharge. The phosphor overcoat is typically selected from alkali and alkaline earth fluorides. In one embodiment, the gaseous medium comprises at least one rare gas selected from neon or argon and at least one other rare gas selected from argon, xenon, krypton. The gas discharge device is preferably of the display/memory type wherein electrical charges are stored on opposing dielectric surfaces, the phosphor and phosphor overcoat being positioned on the dielectric surfaces near the gas discharge.
Abstract:
This patent discloses an improved gas discharge display panel typically of the type used for luminous displays showing lines of electrically changeable alpha-numeric characters, figures and the like. The gas discharge display panel comprises a transparent front cover plate, a rear cover plate, and marginal sealing areas extending adjacent to and about the periphery of each of the plates.The rear plate includes a plurality of contiguous layers of gas impervious material and electrical wiring intermediate the layers. Intermediate the plates is a thin flat chamber containing ionozable gas. Facing each other are a plurality of dielectrically coated electrodes mounted in the chamber, the electrodes of one group being mounted on the front plate at substantially right angles to but not contacting the electrodes of the second group mounted on the rear plate. To effect a localized ionization discharge of the gas, voltages are applied to electrically selected facing electrodes. The rear cover includes the wiring necessary for effecting such localized ionization and the one group of electrodes is electrically connected to the wiring of the rear cover in the marginal sealing areas between the front and rear covers.
Abstract:
A gas discharge panel in which at least the electrodes serving as cathodes are separated from each other by partitions which consist of electrically oxidized aluminum strips which, like the cathodes, are also connected to a flat insulating plate by means of glaze.