Display arrangements

Claim 1

A display arrangement comprising a cathode ray tube, said cathode ray tube including an electron flood gun comprising a cathode, an anode and an accelerating grid disposed between said cathode and said anode whereby said flood gun emits a wide solid cone of electrons, a fluorescent screen and an electrode for controlling the passage of electrons from the electron flood gun to the fluorescent screen, two adjacent and superposed segmented mesh electrodes mounted adjacent to said fluorescent screen, each segmented mesh electrode comprising a set of adjacent parallel co-planar open mesh stripes electrically insulated from each other, each stripe being individually addressable and the open mesh of each stripe presenting a pattern of interstices which are closely spaced both transversely across and longitudinally along each such stripe to permit electrons to pass through the interstices with little physical interruption, and the stripes of one segmented mesh electrode being in crossing relationship to the stripes of the other segmented mesh electrode, whereby an addressed stripe of said one electrode and an addressed stripe of said other electrode in combination control the passage of electrons through said two segmented mesh electrodes onto said screen at and throughout a region of their common crossing.