| Patent Number |
Title Of Patent |
Date Issued |
| 5145432 |
Optical interprogation system for use in constructing flat tension shadow mask CRTS |
September 8, 1992 |
| An optical interrogation system has camera arrays useful for determining the locations of a plurality of apertures on a flat tension shadow mask and fiducial marks on a screened front panel of a CRT. The system determines the actual location of apertures or fiducial marks with respect |
| 5041764 |
Horizontal misconvergence correction system for color video display |
August 20, 1991 |
| A method for use in a raster-scanned electron beam display for displaying an image signal. The image signal is clocked out of a store at a variable clock rate correlated with beam location. The image signal is impressed on the electron beam in order to control image size, position or geo |
| 4706116 |
Wide band beam index system with improved brightness |
November 10, 1987 |
| A wide band single beam index signal system where the electron beam is operated earlier when positioned to strike an index strip in the presence of video signal corresponding to an immediately prior phosphor stripe and extended when positioned to strike an index strip in the presence of |
| 4658288 |
Beam index system with switchable memories |
April 14, 1987 |
| A beam index CRT system includes a pair of memories that are selectively operated to store lines of data from a source and to supply stored lines of data to a CRT. A plurality of NOR gates and flip-flops toggle memory addressing means and simultaneously apply appropriate timing signals |
| 4651197 |
Beam index system having two distinct levels of index video signal |
March 17, 1987 |
| A wide-band single beam index signal system includes a photo multiplier tube supplying a decay compensation circuit for developing an output signal responsive to excitation of index strips by the electron beam of the CRT. The output signal is supplied to a differentiator to determine |
| 4628349 |
Video-index signal mixer |
December 9, 1986 |
| A wide-band video amplifier-index signal mixer for driving a beam index CRT includes a low power, high speed "off-the-shelf" video switching transistor having two inputs, one supplied by a first low power, high speed switching transistor coupled to receive video signals and another s |
| 4560910 |
Parabolic waveform generator |
December 24, 1985 |
| A dynamic focusing circuit for a CRT includes a DC coupled parabolic voltage waveform generator having a first capacitor supplied with constant charging current from a transistor for developing a sawtooth voltage waveform thereacross, a first switch transistor for discharging the first |
| 4535273 |
Transformerless switching circuit for driving a horizontal output transistor |
August 13, 1985 |
| A transformerless switching circuit is described for rapidly turning a horizontal output transistor off and on in response to horizontal rate input pulses. The switching circuit includes a first transistor which is rendered alternately conductive and non-conductive by the input pulses, a |
| 4527192 |
Index signal enhancement circuit |
July 2, 1985 |
| A color display system includes an index CRT and a photo multiplier tube for developing an index signal in response to electron bombardment of regularly spaced phosphor index strips overlying the screen on the tube. Correction means, including time delayed and inverted blue and red video |
| 4468690 |
Beam index color display system |
August 28, 1984 |
| A display system is disclosed for receiving video data from a character generator and for applying that data to a beam index tube. The system includes a memory for storing data received from the character generator and for outputting the stored data in response to an index clock signal |
| 4408223 |
Beam index color display system |
October 4, 1983 |
| A display system is disclosed for receiving video data from a character generator and for applying that data to a beam index tube. The system includes a memory for storing data received from the character generator and for outputting the stored data in response to an index clock signal |
| 4368485 |
Billboard large screen TV |
January 11, 1983 |
| A billboard video display system comprises a plurality of cathode ray tubes arranged in a predetermined configuration, each of the cathode ray tubes including a viewing screen characterized by a coarse color phosphor pattern. The electron beam generated by each of the cathode ray tubes i |
| 4300157 |
Means for enhancing uniformity in electron beam spot size in television picture tubes |
November 10, 1981 |
| This disclosure depicts means for providing greater spot size uniformity across the screen of cathode ray picture tubes. A beam-current-control signal is derived from the horizontal scansion circuit means in which the amplitude of the signal varies monotonically as a function of the dist |
