摘要:
A display device has an electron ray generating unit of matrix electrode structure in which a plurality of cold cathodes generating electron rays are arranged two-dimensionally, image storing apparatus for storing therein image information as an amount of charges by a variation in a surface potential produced by the application of the electron rays from the electron ray generating unit, and a display for receiving the application of the electron rays applied from the electron ray generating unit and modulated by the electric charge stored in the image storing apparatus and visualizing the image information.
摘要:
A direct view storage tube with improved brightness and contrast provided by means of a current grain electrode positioned between the storage electrode and the output screen of the tube.
摘要:
A transmission type direct storage tube in which a lateral field neutralizer electrode is positioned adjacent the transmission storage electrode to confine the lateral effects of charge on the storage electrode to individual mesh openings in the storage electrode and prevent interaction with neighboring mesh openings.
摘要:
A method and apparatus is described for providing non-storage electron multiplier operation of transmission storage tubes and other cathode ray tubes employing a transmission mesh target and a separate phosphor screen spaced therefrom. The improved operation is achieved by bombarding the dielectric layer on the mesh target electrode with low velocity flood electrons to charge such dielectric to a negative voltage with respect to the target electrode, thereafter bombarding the charged dielectric with a beam of high velocity writing electrons having energies greater than the first crossover potential to cause secondary electron emission at a greater than unity ratio to provide electron multiplication and attracting the secondary electrons through the mesh openings of the target electrode to the phosphor screen. The flood electron gun may be turned off during writing so that the flood electrons do not strike the phosphor screen in order to provide better image contrast. This electron multiplication increases the current of the electron beam striking the phosphor screen and thereby increases the maximum nonstored writing speed and the brightness of the light image.
摘要:
A grid is coated with a dielectric material which has good secondary emission characteristics and the coated grid is mounted in a cathode ray tube along with a collector electrode. The secondary emission structure is used as an expansion lens or a storage mesh in a storage type cathode ray tube.
摘要:
A direct viewing charge image storage tube is described in which a low density halftone storage target is employed along with a higher density bistable storage target. Charge images are written on the halftone target at a fast writing speed, up to about 300 million centimeters per second, and then such charge image is transferred to the bistable target where it is stored for a long time, up to one hour or more. The bistable storage target may be of the nonmesh type that employs a storage dielectric of phosphor material which emits a light image corresponding to the charge image stored thereon. The storage dielectric of a halftone target is more porous and lower density than the phosphor storage dielectric and may be a porous metal oxide, such as magnesium oxide, having a density of 2 to 5 percent of its normal bulk density which provides a target of low capacitance and extremely fast writing speed.