Abstract: Cathode-ray tubes with a shadow mask effective in minimizing the moiré effect are disclosed. The shadow mask has a plurality of apertures allowing electron beams to pass through, where a vertical pitch Py between each of the neighboring apertures along a minor axis of the shadow mask and a scanning pitch Ps between each of the scan lines of the electron beams satisfy the following relations hip: ((2n+1)/4)−0.1≦Ps/Py≦((2n+1)/4)+0.1 where n is an integer not less than three.

Abstract: A shadow mask assembly for a cathode ray tube (CRT) includes a color selection electrode provided with a large number of beam-passing apertures, a mask frame having a pair of supporting members and a pair of elastic members disposed so as to maintain a predetermined distance between the supporting members, a plurality of spring holders mounted on the supporting and elastic members, each of the spring holders comprising a spring fixing portion and a frame fixing portion that are arranged in a longitudinal direction of the spring holder, one of the spring and frame fixing portions being formed of a bimetal and the other being formed of a uni-metal, and a spring for supporting the mask frame on an inner surface of a cathode ray tube panel, the spring having a first end fixed on the spring fixing portion of the spring holder and a second end fixed on a stud pin embedded in an inner surface of the cathode ray tube panel.

Abstract: Cathode-ray tubes with a shadow mask effective in minimizing the moiré effect are disclosed.