Patent ID: 6294865
Filing Date: 2001-09-25
Classification: H01J

Abstract:
Display device having a cathode ray tube comprising an in-line electron gun for generating three in-line electron beams in a neck of the cathode ray tube, the in-line electron gun comprising a main lens part having three apertures for passing the three electron beams, and a deflection unit, the display device having means to supply an anode voltage to an electrode of the main lens and having a cathodoluminescent phosphor screen provided on a viewing panel of the cathode ray tube, characterized in that in operation the anode voltage lies in the range 16-22 kVolt and the product of the square root of the anode voltage (V.sub.a.sup.0.5) and an electron beam pitch p in the main lens raised to the 3/2 power (p.sup.3/2), is greater than 50 kVolt.sup.0.5 mm.sup.3/2.