Cathode-ray tube with reduced moire
AssigneeSamsung SDI Co., Ltd.
InventorsDo-Hun Pyen, Jong-Heon Kim, Jung-In Yoo
Life of this patent
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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 relationship: ((2n+1)/4)−0.1≦Ps/Py≦((2n+1)/4)+0.1 where n is an integer not less than three.
Claims13
A cathode-ray tube, comprising:
- a panel with a phosphor screen being arranged on an inner surface of the panel;
- a funnel connected to the panel, the funnel having a deflection yoke assembly on an outer periphery of the funnel;
- a neck connected to the funnel, the neck having an electron gun assembly disposed therein;
- and
- a shadow mask disposed inside the panel, the shadow mask having a plurality of apertures allowing electron beams to pass through, 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 scan line of the electron beams satisfy the following relationship:
- ((2n+1)/4)−0.1≦Ps/Py≦((2n+1)/4)+0.1
- where n is an integer having a value of at least three.
An apparatus, comprising a shadow mask having a plurality of apertures, the shadow mask having 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 scan line of the electron beams satisfy the following relationship:
- ((2n+1)/4)−0.1≦Ps/Py≦((2n+1)/4)+0.1
- where n is an integer having a value of at least three.
Dependencies are inferred from the claim text.