Other

Compugraphic Corporation

Clayton A Washburn

George J Sausele

A display has a cathode ray tube (CRT) provided with a multiplicity of electron beams or beam sets. Each of the beams has its own auxiliary beam control assembly including deflection means. Each beam assembly is directed to energize a prescribed portion of the display format area. The typical application may employ two to six beam sets and is useful to reduce total depth and bulk of CRT's having high aspect ratios and/or large size. The displayed area shows substantially no visible boundaries (tiling) between portions.

Multi-deflection CRT display

A dynamic color separation display CRT having an electron beam forming structure for beam generation and electrostatic impingement control. The electron gun forms a group of electron beams and includes a multi-aperture G1 grid for receiving the electron beam group. The group of electron beams overlap and combine to provide an impingement pattern that matches a primary color stripe without use of a shadow mask when focused on the output screen surface. An alternate preferred embodiment includes a grooved cathode to control the size, shape, and profile of the emitted beam.

Electron beam generation and control for dynamic color separation

A deflection yoke assembly with an annular magnetic core to energize a magnetic deflection field within a CRT and an annular array of pole pieces to define the length and shape of the magnetic deflection field mounted within and concentric with the annular core.

Cathode ray tube deflector yoke assembly

A Dynamic Color Separation (DCS) color display system employs signals which provide timing, luminance, and chrominance information of the display output. The display system includes a timing circuit which produces unique signals for correcting errors produced when hue is controlled by the phase of the (S) signal and the degree of saturation with its amplitude. The signals may be applied to know CRT beam guns, and modified guns specific to the generated signals are also disclosed.

Dynamic color separation display

A Dynamic Color Separation (DCS) color display system employs signals which provide timing, luminance, and chrominance information of the display output. The display system includes a timing circuit which produces unique signals for correcting errors produced when hue is controlled by the phase of the (S) signal and the degree of saturation with its amplitude. The signals may be applied to known CRT beam guns, and modified guns specific to the generated signals are also disclosed.

A cathode ray tube gun structure for minor deflection of an electron beam and employing electrostatic beam deflecting electrodes ultimately controlled by a deflection signal at a low voltage level for minor deflection of the beam. The minor beam deflection electrodes may be positioned in the low beam potential focus region of the gun to provide for minor deflection of the beam. The electrodes may be enclosed in a cylindrical electrode, the latter being used for focusing the beam, or the cylindrical electrode may be omitted in which case focusing and deflection functions are provided by the minor beam deflection electrodes. The minor beam deflection electrodes may be positioned in a high beam potential region, in which case low voltage control is provided by capacitive coupling through the envelope of the tube. The deflection electrodes may also be employed as the conventional second grid structure in a cathode ray tube gun structure. A cathode ray tube gun structure having a grooved cathode surface in conjunction with grid structures containing rectangular apertures therein for the formation of a beam substantially rectangular in cross section having uniform beam density across the section. A screen for a cathode ray tube having a mosaic of elements, in which one or combinations of elements located between the glass face plate and a conventional backing layer are employed to enhance or inhibit secondary emission of electrons, as desired, for various regions of the mosaic. A screen for a cathode ray tube having a curvature defined by a radius R, the center of curvature of which is positioned at the center of magnetic deflection of the major beam deflection structure.

Cathode ray tube indexing structures

Apparatus for reproducing characters from cathode ray tubes wherein a beam is deflected onto alpha/numeric characters occupying a selected area of a font. The beam is deflected by relatively high speed linear vertical strokes which are displaced horizontally by a slower speed stroke advance waveform and each scan is positioned relative to one of the selected areas. The vertical linear strokes of the beam are at a variable rate and the vertical strokes are terminated by time interval pulses at an amplitude corresponding to the area height of the font character. The rate of the strokes is determined by the time interval pulses which in turn are regulated by point size control selection means. A resultant two level output signal representative of the successive selected characters controls another cathode ray tube, the scanning of which is identical to that of the first cathode ray tube. The deflection of the beam in the second cathode ray tube is at a constant rate and the intervals of the strokes in the scanning of the second cathode ray tube are also controlled by the time interval pulses.

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Thornwood, NY, United States of America

Clayton A Washburn