Abstract:
The laser cathode ray tube has a laser screen; a focusing system for focusing the electron beam on the laser screen; a deflection system for deflecting the electron beam; and at least two electron guns with cathodes for generating at least two electron beams focused simultaneously on one and the same laser screen element defined by the deflection system.
Abstract:
A semiconductor laser screen in a cathode-ray tube with a sealed casing. The laser screen has a screen structure which is formed by a semiconductor member, a reflecting mirror and a partly transparent mirror on opposite sides of the semiconductor member. The screen structure is connected to a transparent support by means of a connecting layer which is formed by glass having a softening point of at least 675K. The materials of the semiconductor member, the transparent support, the connecting layer and the casing are made of materials with similarly low coefficients of expansion to prevent damage to the screen as it cools down from the manufacturing process.
Abstract:
This invention relates to a radiation display tube having an increased image resolution and recording efficiency and comprising a first evacuated chambers, a second chamber having a radiation transparent end wall with a conductive inner surface and which is adapted to be filled with an ionizable gas of desired constituency and pressure, and a gas tight, nonconducting interface wall positioned therebetween and having a plurality of discrete conducting elements extending therethrough. Apparatus is provided in the first chamber for projecting and scanning an electron beam upon the interface wall which thereby causes a current to be conducted through the interface whereby a sequence of arc discharges will occur in the second chamber. Means are also provided to vary the fill of the second chamber with gas of the desired constituency.
Abstract:
The present invention relates to electronic technology field, and more particularly to CRT and projection system. A low power laser CRT based on parallel flow electron gun comprises a vacuum tube, a laser panel provided at one end of the vacuum tube and an electron gun provided at the opposing end. The electron gun adopts a parallel flow electron gun, wherein the parallel flow electron gun comprises a negative electrode, a G1 electrode and a control electrode, wherein the control electrode is connected to an electron beam current control system. The electron gun of the present invention adopts parallel flow electron gun to emit electron beam, so that the laser panel has even current density distribution so as to average the power consumption of laser panel to reduce the energy that is converted to heat.
Abstract:
A liquid crystal display is provided on the surface of a vidicon face plate. A number of conductive pins or electrodes connect to associated field effect transistors imbedded in the liquid crystal display for selectively energizing discrete areas in the liquid crystal display; the pins extend through the vidicon face plate. The electron beam of the vidicon is scanned sequentially across the terminals, and is turned on and off in accordance with stored binary data to impinge upon and selectively activate certain ones of the pins or electrodes, turning on the associated FET. After the full face of the vidicon has been scanned to form the desired pattern of activated FET's, a voltage is applied across the liquid crystal display. The area opposite each turned on FET will be appropriately polarized presenting a display on the outward facing surface of the display. This display is used to excite a photoconductive drum such as in an electrostatic photocopier to print a copy of the display data.
Abstract:
An infrared simulator serves to directly transduce electron beams into infrared radiation. To this purpose a modified cathode-ray tube is provided which includes an infrared transmissive window. Behind this window a film within the vacuum of the cathode-ray tube is arranged in order to transduce the electron bombardment into infrared radiation.
Abstract:
An envelope for a projection television tube includes a spherically curved electronic beam target surface spaced away from the neck of the tube, a larger reflective surface spherically curved concentrically with the target surface on an end plate located close to the tube neck, a target support that preferably constitutes a face plate for the envelope, and a hollow cylindrical spacer member for closing the side of the tube envelope and for holding the target support accurately spaced from the reflective surface. The ends of the cylindrical member and the abutting surfaces of the end plate and target support are all configured to provide joint interfaces between the elements that lie in spherical planes that are concentric with the target and reflective surfaces, so that slight lateral motion of the parts during assembly and handling will not affect tube projection optics, while the spacing between the target and reflective surfaces is precisely maintained in concentric relationship.
Abstract:
An improved bistable storage target structure for a cathode-ray tube includes a faceplate-supported transparent target electrode covered by a transparent insulating layer. Overlying the insulating layer is an apertured web collector electrode and a storage component of secondary emissive material formed by a plurality of phosphor deposits disposed within the web apertures. A patterned layer of insulating material is provided overlying the web electrode to isolate the phosphor deposits from the collector electrode.