Patent Number: 6,674,230

Title: Asymmetric space-saving cathode ray tube with magnetically deflectedelectron beam

Abstract: A cathode ray tube includes an electron gun directing electrons away from afaceplate having an electrode biased at screen potential. One or moreelectromagnets located on or near the rear wall of the tube envelope arebiased with dc currents so that the electron beam (three beams in a colortube) is deflected by the magnetic field produced thereby to impinge uponthe faceplate. The electron beam is magnetically deflected over arelatively small angle as it exits the electron gun to scan across thefaceplate to impinge upon phosphors thereon to produce light depicting animage or information. The electromagnet closest the electron gun istypically biased to produce a strong magnetic field to deflect electronsto the faceplate near to the electron gun. The electromagnets more distantthe electron gun produce magnetic fields to direct electrons towards thefaceplate, with the electromagnet most distant the electron gun deflectingthe electrons to tend to increase the landing angle thereof on thefaceplate. One or more of the foregoing electromagnets may be utilized incooperation with one or more electrodes biased at a potential to similarlydeflect the electrons to the faceplate.

Inventors: Carpinelli; Joseph Michael (Lawrenceville, NJ), Bechis; Dennis John (Yardley, PA), Riddle; George Herbert Needham (Princeton, NJ)


International Classification: H01J 29/70 (20060101); H01J 29/72 (20060101); H01J 31/20 (20060101); H01J 31/12 (20060101); H01J 31/10 (20060101); H01J 029/64 (); H01J 029/76 ()

Expiration Date: 01/02016