Abstract:
In a plasma display panel consisting of gas enclosed between adjacent insulating members, a light source is used to supply charged particles in the gas to permit firing of the gas when coordinate conductors identifying a site location are energized. The use of such pilot lamps facilitates ignition in firing with uniform selection and firing potentials within all sites of the display panel. To eliminate the difficulty in achieving firing during cold starts a radioactive source comprised of a copper wire electroplated with nickel 63 and overcoated with a protective coat of nickel is placed within the gas panel to provide a source of free electrons. The wire is held in place by friction against the inside walls of the panel. Since the wire emits only beta radiation, no radiation hazard exists externally to the panel.
Abstract:
During the construction of display gas panels front and back panels are connected together by means of a seal which forms a chamber for receiving a display gas. A hole is provided in the back plate which is outside the display viewing area and a glass tube is fitted into this hole and sealed to the assembly. The tube is used to first evacuate and then admit display gas into the chamber. An electric tip-off oven is used to collapse the tube stem to form a permanent seal. A cast protective heat sink and a reflective foil wafer are used to protect the gas panel and the tube-to-gas panel interface from damage by the oven.
Abstract:
The invention is an improvement in a liquid crystal display device of the type having spaced front (10) and rear (12) glass panels, a transparent electrode layer (18), and an array of individually addressable pel electrodes (20) separated from the transparent electrode layer by a cavity filled with liquid crystal material (30). The improvement comprises a color filter layer in the form of a decal pattern (22). The decal pattern (22) is formed using interference film techniques which form an inorganic color filter. The decal is placed on one of the glass panels using known decal transfer methods. The inorganic nature of the color filter layer and the decal transfer methods allow for enhanced optical density of the color liquid crystal display.
Abstract:
An improved method of cleaning a glass substrate prior to evaporation of chrome metal electrodes upon it. The substrate is cleaned by the use of glow discharge in a wet active gas, preferably air or forming gas.
Abstract:
The invention is an improvement in a liquid crystal display device of the type having spaced front (10) and rear (12) glass panels, a transparent electrode layer (18), and an array of individually addressable pel electrodes (20) separated from the transparent electrode layer by a cavity filled with liquid crystal material (30). The improvement comprises a color filter layer in the form of a decal pattern (22). The decal pattern (22) is formed using interference film techniques which form an inorganic color filter. The decal is placed on one of the glass panels using known decal transfer methods. The inorganic nature of the color filter layer and the decal transfer methods allow for enhanced optical density of the color liquid crystal display.
Abstract:
The color filters required for a thin film transistor liquid crystal display device are provided by using polychromatic glass for either the front (38) or rear (54) glass panel of the device. Through a series of masking, ultraviolet exposure and heat treating steps, red, green, and blue color areas can be generated in the polychromatic glass. Each of the different colored areas is, of course, to be aligned with one of the individually-addressable pel electrodes (42A, 42B, 42C) in the device. In a first embodiment, the polychromatic glass forms the rear glass panel (54) of the device and serves as a substrate for the thin film transistors (44) used to individually address pel electrodes (42). In an alternate embodiment, the front glass panel (38) is treated to form the color filter regions.
Abstract:
An improved vidicon tube is produced by adding a transmission grid to a standard vidicon tube. The improved tube serves as an image buffer which is compatible with broadband and narrowband transmission lines and can be written electrically at high or low data rates as well as optically. Information optically impressed on the photoconductor can be transferred to storage on the transmission grid. The improved vidicon, when built with a standard T.V. compatible photoconductor, is used as an intrusion alarm. When the improved vidicon is built with a storage photoconductor, information which is electrically written on the transmission grid is converted to conductivity storage in the photoconductor. Appropriate supporting apparatus and methods of operating this versatile tube are discussed.
Abstract:
A gaseous discharge display and/or memory device comprises a pair of sealed glass plates having metallic conductor arrays formed thereon and insulated from contact with the gas by a dielectric layer. The crossover points of the conductors define the locations of the individual cells which are controlled by selective application of write, sustain, and erase signals. To permit uniform operation of individual cells, the plates must be maintained precisely spaced over their entire display surface. To effect this requirement in a large size panel, metallic spacers are secured to the upper surface of the conductors of the metallic conductor arrays prior to the formation of the dielectric layer, the size and number of these spacers being determined by the geometry and resolution of the gaseous discharge display device.