CATHODE RAY TUBE DISPLAY APPARATUS

PCT No. PCT/GB95/01396 Sec. 371 Date May 30, 1997 Sec. 102(e) Date May 30, 1997 PCT Filed Jun. 15, 1995 PCT Pub. No. WO96/17470 PCT Pub. Date Jun. 6, 1996Cathode ray tube display apparatus comprises a cathode ray display tube (210) in which an electron beam spot is scanned in a raster pattern to pro...

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Bibliographische Detailangaben
1. Verfasser:	BEETESON, JOHN
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CRYPTOGRAPHY DISPLAY EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SEALS
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Zusammenfassung:	PCT No. PCT/GB95/01396 Sec. 371 Date May 30, 1997 Sec. 102(e) Date May 30, 1997 PCT Filed Jun. 15, 1995 PCT Pub. No. WO96/17470 PCT Pub. Date Jun. 6, 1996Cathode ray tube display apparatus comprises a cathode ray display tube (210) in which an electron beam spot is scanned in a raster pattern to produce an output image. Drive means (200) generates drive voltages on the focus electrode, first and second grid electrodes, and a cathode of the cathode ray tube to generate the electron beam spot in the cathode ray tube. Spot size control means (120) simultaneously varyies, in response to a spot control signal, the voltages generated on the focus electrode, first and second gird electrodes and the cathode by the drive means to vary the size of the electron beam spot in the cathode ray tube.