Claims
- 1. A color cathode ray tube of shadow mask type, comprising:
- a face plate panel with a long axis and a short axis having an effective screen portion and a peripheral portion,
- wherein when the curved outer surface of said face plate panel is expressed by three-dimensional spatial equations in which the X-axis is the long axis of said face plate panel, the Y-axis is the short axis thereof and the Z-axis is the tube axis thereof, the curved outer surface Z.sub.X and Z.sub.Y on the long axis and the short axis are approximated by,
- Z.sub.X =A.sub.1 X.sup.2 +A.sub.2 X.sup.4 +A.sub.3 X.sup.6
- Z.sub.Y =A.sub.4 Y.sup.2 +A.sub.5 Y.sup.4 +A.sub.6 Y.sup.6
- and when P.sub.X and P.sub.Y of the curved outer surface are defined by,
- P.sub.X =A.sub.1 X.sub.1.sup.2 /(A.sub.1 X.sub.1.sup.2 +A.sub.2 X.sub.1.sup.4 +A.sub.3 X.sub.1.sup.6)
- P.sub.Y =A.sub.4 Y.sub.1.sup.2 /(A.sub.4 Y.sub.1.sup.2 +A.sub.5 Y.sub.1.sup.4 +A.sub.6 Y.sub.1.sup.6)
- at points (X=X.sub.1, Y=Y.sub.1) which are boundary portions of the effective screen portion on the X-axis and the Y-axis respectively, and the constants A.sub.1,A.sub.2,A.sub.3,A.sub.4,A.sub.5 and A.sub.6 are set to satisfy
- 0.6<P.sub.X (X=X.sub.1).ltoreq.0.9
- 0.6.ltoreq.P.sub.Y (Y=Y.sub.1).ltoreq.1.0,
- the curvature radii R (mm) on the boundary portion of the effective screen portion at the short side and at the long side satisfies the relationship:
- 2.0(42.5 V+45)mm<R.ltoreq.4.0(42.5 V+45)mm
- when the effective diagonal diameter of said face plate panel is V, wherein V is measured in inches.
- 2. A color cathode ray tube of shadow mask type, comprising:
- a face plate panel with a long axis and a short axis having an effective screen portion and a peripheral portion,
- wherein when the curved inner surface of said face plate panel is expressed by three-dimensional spatial equations in which the X-axis is the long axis of said face plate panel, the Y-axis is the short axis thereof and the Z-axis is the tube axis thereof, the curved inner surface Z.sub.X and Z.sub.Y on the long axis and on the short axis are approximated by,
- Z.sub.X =A.sub.1 X.sup.2 +A.sub.2 X.sup.4 +A.sub.3 X.sup.6
- Z.sub.Y =A.sub.4 Y.sup.2 +A.sub.5 Y.sup.4 +A.sub.6 Y.sup.6
- and when P.sub.X and P.sub.Y of the curved inner surface are defined by,
- P.sub.X =A.sub.1 X.sub.1.sup.2 /(A.sub.1 X.sub.1.sup.2 +A.sub.2 X.sub.1.sup.4 +A.sub.3 X.sub.1.sup.6)
- P.sub.Y =A.sub.4 Y.sub.1.sup.2 /(A.sub.4 Y.sub.1.sup.2 +A.sub.5 Y.sub.1.sup.4 +A.sub.6 Y.sub.1.sup.6)
- at points (X=X.sub.1, Y=Y.sub.1) which are boundary portions of the effective screen portion on the X-axis and the Y-axis respectively, and the constants A.sub.1,A.sub.2,A.sub.3,A.sub.4,A.sub.5 and A.sub.6 are set to satisfy
- 0.6<P.sub.X (X=X.sub.1).ltoreq.0.9
- 0.6.ltoreq.P.sub.Y (Y=Y.sub.1).ltoreq.1.0,
- the curvature radii R (mm) on the boundary portion of the effective screen portion at the short side and at the long side of the inner surface of said face plate panel satisfies the relationship:
- 2.0(42.5 V+45)mm<R.ltoreq.4.0(42.5 V+45)mm
- when the effective diagonal diameter of said face plate panel is V, wherein V is measured in inches.
- 3. A color cathode ray tube of shadow mask type, comprising:
- a face plate panel with a long axis and a short axis having an effective screen portion and a peripheral portion;
- a shadow mask, with a long axis and a short axis having a curved surface, which includes a perforated effective area and a peripheral portion;
- wherein when the curved surface of said shadow mask is expressed by three-dimensional spatial equations in which the X-axis is the long axis of the shadow mask, the Y-axis is the short axis thereof and the Z-axis is the tube axis thereof, the curved surface Z.sub.X and Z.sub.Y on the long axis and on the short axis are approximated by
- Z.sub.X =A.sub.1 X.sup.2 +A.sub.2 X.sup.4 +A.sub.3 X.sup.6
- Z.sub.Y =A.sub.4 Y.sup.2 +A.sub.5 Y.sup.4 +A.sub.6 Y.sup.6,
- and when P.sub.X and P.sub.Y of the curved surface are defined by
- P.sub.X =A.sub.1 X.sub.1.sup.2 /(A.sub.1 X.sub.1.sup.2 +A.sub.2 X.sub.1.sup.4 +A.sub.3 X.sub.1.sup.6)
- P.sub.Y =A.sub.4 Y.sub.1.sup.2 /(A.sub.4 Y.sub.1.sup.2 +A.sub.5 Y.sub.1.sup.4 +A.sub.6 Y.sub.1.sup.6),
- at points (X=X.sub.1, Y=Y.sub.1) which are boundary portions of the effective area on the X-axis and the Y-axis respectively, and the constants A.sub.1,A.sub.2,A.sub.3,A.sub.4,A.sub.5 and A.sub.6 are set to satisfy
- 0. 6<P.sub.X (X=X.sub.1).ltoreq.0.9
- 0.6.ltoreq.P.sub.Y (Y=Y.sub.1).ltoreq.1.0,
- the curvature radii R (mm) on the boundary portion of the effective area portion at the short side and at the long side satisfies the relationship:
- 2.0(42.5 V+45)mm<R.ltoreq.4.0(42.5 V+45)mm
- when the effective diagonal diameter of said shadow mask is V, wherein V is measured in inches.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3-189772 |
Jul 1991 |
JPX |
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Parent Case Info
This application is a continuation-in-part application of U.S. application Ser. No. 07/921,730, filed Jul. 30, 1992, now abandoned, by the same inventors herein, the subject matter of which is incorporated herein by reference.
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
921730 |
Jul 1992 |
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