Shadow mask structure for cathode ray tube
AssigneeLG. Philips Displays Korea Co., Ltd.
InventorHoon Jeong
Life of this patent
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Abstract
A cathode ray tube comprising a panel of which an outer surface is substantially flat and an inner surface has a certain curvature, and a shadow mask arranged with a certain interval from an inner surface of the panel and having a plurality of apertures through which electron beams pass, wherein the shadow mask satisfied a condition of 0.9≦ZmD/(ZmX+ZmY)≦1.1, in which an arbitrary point on a diagonal axis of the shadow mask is supposed to be Dr, points on a long axis and a short axis meeting with perpendiculars drawn to the long axis and the short axis from the point Dr are respectively supposed to be Xr and Yr, and intervals between the respective points Xr, Yr, and Dr and the shadow mask in a tube axis direction are respectively supposed to be ZmX, ZmY, and ZmD.
Claims25
A cathode ray tube comprising:
- a panel of which an outer surface is substantially flat and an inner surface has a certain curvature;
- and
- a shadow mask arranged with a certain interval from an inner surface of the panel and having a plurality of apertures through which electron beams pass,
- wherein the shadow mask satisfied a condition of 0.9≦ZmD/(ZmX+ZmY)≦1.1, in which an arbitrary point on a diagonal axis of the shadow mask is supposed to be Dr, points on a long axis and a short axis meeting with perpendiculars drawn to the long axis and the short axis from the point Dr are respectively supposed to be Xr and Yr, and intervals between the respective points Xr, Yr, and Dr and the shadow mask in a tube axis direction are respectively supposed to be ZmX, ZmY, and ZmD.
A cathode ray tube comprising:
- a panel of which an outer surface is substantially flat and an inner surface has a certain curvature;
- and
- a shadow mask arranged with a certain interval from an inner surface of the panel and having a plurality of apertures through which electron beams pass,
- wherein a dimension ratio of the panel is 4:3, a size of an effective surface of the panel on which a phosphor screen is deposited is 650 mm˜720 mm, and the shadow mask satisfies a condition of 0.9≦ZmD/(ZmX+ZmY)≦1.1, in which an arbitrary point on a diagonal axis of the shadow mask is supposed to be Dr, points on a long axis and a short axis meeting with perpendiculars drawn to the long axis and the short axis from the point Dr are respectively supposed to be Xr and Yr, and intervals between the respective points Xr, Yr, and Dr and the shadow mask in a tube axis direction are respectively supposed to be ZmX, ZmY, and ZmD.
A cathode ray tube comprising:
- a panel of which an outer surface is substantially flat and an inner surface has a certain curvature;
- and
- a shadow mask arranged with a certain interval from an inner surface of the panel and having a plurality of apertures through which electron beams pass,
- wherein if a functional formula of a respective lines connecting a maximum value and a minimum value of a respective radii of curvature in directions of a long axis, a short axis and a diagonal axis of the shadow mask from a center towards a periphery is supposed to be y=Ax+B, the shadow mask satisfies a condition of −5.0≦A≦−1.0, in which y denotes a radius of curvature, x denotes a distance from the center of the shadow mask to a position on the long axis, the short axis or the diagonal axis, A denotes a gradient of the lines, and B denotes a constant.
Dependencies are inferred from the claim text.