Display device having a cathode ray tube
AssigneeU.S. Philips Corporation
InventorJoseph W. J. M. Van Der Heijden
Life of this patent
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Abstract
Display device having an in-line electron gun with a main lens, in which the anode voltage ranges between 16 and 22 kVolt and the parameter Va0.5.p3/2 is greater than 50 kVolt0.5 mm3/2. A reduction of the total power can be achieved without sacrificing front-end performance.
Claims9
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 (Va0.5) and an electron beam pitch p in the main lens raised to the 3/2 power (p3/2), is greater than 50 kVolt0.5 mm3/2.
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 (Va0.5) and an electron beam pitch p in the main lens raised to the 3/2 power (p3/2), is greater than 55 kVolt0.5 mm3/2.
Dependencies are inferred from the claim text.