Abstract:
In a color cathode ray tube, by optimizing an outer radios of curvature, an inner radius of curvature on a corner portion, a thickness of a long side, a thickness of a short side, a thickness of the corner portion, the total length of the panel, the total length of the funnel body and the total length of a yoke portion of the funnel determining a section shape of the yoke portion of the funnel, a stress concentrated on the yoke portion can be lowered. In addition, according to the increase of an inner radius of curvature of the corner portion of the yoke portion, a crash phenomenon of an electron beam is decreased, and an impact resistance and productivity improvement in fabrication process can be secured by lowering a high stress occurrence on the funnel in vacuum.
Abstract:
The present invention aims at maintaining the high focusing performance at a low deflection power in a single-beam projection tube which is used as a projection type TV receiver or a projector and is operated at a high voltage and with a high current. The neck outer diameter of a portion on which a deflection yoke is mounted is made smaller than the neck outer diameter of a portion which accommodates an electron gun. The maximum anode voltage of the projection tube is set to equal to or more than 25 kV and the maximum beam current is set to equal to or more than 4 mA
Abstract:
A main lens comprises a second segment G5-2, a sixth grid G6 and an additional electrode GM disposed between the second segment G5-2 and sixth grid G6. A first-level constant voltage and a second-level constant voltage are applied to the second segment and sixth grid, respectively. A third-level voltage, which is at a level between the first level and the second level, is applied to the additional electrode. In accordance with the increase in deflection amount of an electric beam, the third-level voltage varies a value expressed by ((voltage to the additional electrode)null(voltage to the second segment))/((voltage to the sixth grid)null(voltage to the second segment)). An auxiliary lens comprising lenses including a third grid G3 and a first segment G5-1 has a focusing power decreasing in accordance with an increase in deflection amount of the electron beam.
Abstract:
A monochrometer mounted with the electron gun of an electron microscope or the like. This monochrometer does not need movement of a slit. An electron source consisting of any one of a thermal emission-type electron source (such as an LaB6 electron source or a tungsten hairpin), a Schottky emission-type electron source, and a tunneling field emission-type electron source is used. The slit is made of a single metal plate and mounted in position fixedly. Electrons are emitted from the electron source and dispersed within a plane including the slit according to energies. The slit is so positioned that it passes only those of the dispersed electrons which have energies close to the peak energy and blocks electrons having energies higher or lower than the peak energy.
Abstract:
A bulb for a color cathode ray tube comprising a face plate and a color selection member having a plurality of opening portions, said bulb satisfying the following expressions (1) and (2), wherein X is a nominal diagonal inchage of the bulb, P (unit: mm) is a pitch of the opening portions along an electron beam sweep direction in the central portion of the bulb, GH (unit: mm) is a distance between an inner surface of the face plate and the color selection member in the central portion of the bulb, and LT is a value obtained by dividing a size (unit: mm) of the opening portion along the electron beam sweep direction in the central portion of the bulb by the pitch P (unit: mm). 0.0117Xnull0.0457
Abstract:
A method and apparatus is disclosed for electrostatic deflection and focusing of a charged particle stream. The apparatus can include plural vertical and horizontal deflection plates, although a single vertical and a single horizontal deflection plate each with a reference potential plane are preferred. Both orthogonal and preferably tilted display screens are employed to receive the deflected beam. The particle stream is injected offset from a centered position and the stream is deflected asymmetrically relative to the attracting deflection plate. Two alternately preferred computer programs are employable to calculate an offset position. A preferred external quadrupole is employed to correct any residual astigmatism in the particle stream. In one embodiment, the apparatus is disposed in a cathode ray tube. A reduced footprint CRT is also disclosed. Methods and apparatuses for an energy filtered electron beam, a mass spectrometer and a mass separator are also disclosed.
Abstract:
Disclosed is an electron source forming substrate provided with an insulating material layer provided on the surface of a substrate, at which surface an electron-emitting device is disposed, wherein the insulating material layer has a plurality of partially exposed metal oxide particles on its surface. Also disclosed are an electron source including a substrate and an electron-emitting device arranged on the substrate, wherein the substrate is an electron source forming substrate as described above, and an image display apparatus including an envelope, an electron-emitting device arranged in the envelope, and an image display member adapted to display images through application of electrons from the electron-emitting device, wherein a substrate on which the electron-emitting device is arranged is an electron source forming substrate as described above.