Color cathode ray tube
View Patent ↗A color cathode ray tube is provided in which an inner radius of curvature is designed as 0.3≦(Rxe/Rxc)≦0.5, to obtain a structural intensity of a panel mask corresponding to the inner curvature of the cathode ray tube panel to decrease partial doming and increase a drop characteristic.
1. A color cathode ray tube comprising:
a panel of which an outer surface is substantially plane and an inner surface has a predetermined curvature; and
a mask for selecting colors of electron beams incident from inside of the panel,
in which a formula, 0.3≦(Rxe/Rxc)≦0.5 is satisfied,
wherein Rxe is an inner curvature radius at an edge of a long axis of the panel, and Rxc is an inner curvature radius at a center of a long axis of the panel.
2. The color cathode ray tube of claim 1 , wherein the inner curvature radius is gradually decreased from a center portion of the panel towards a peripheral portion of the panel.
3. The color cathode ray tube of claim 1 , wherein the mask is formed of AK material.
4. The color cathode ray tube of claim 1 , wherein a USD of the panel is 500 mm or less, and wherein the USD is a diagonal size of an effective surface of the panel.
5. The color cathode ray tube of claim 1 , wherein the mask is formed of either Fe—Ni based alloy or Fe—Ni—Co based alloy.
6. The color cathode ray tube of claim 5 ,
wherein a USD of the panel is 500 mm or less, and
wherein USD is a diagonal size of an effective surface of the panel.
7. A color cathode ray tube comprising:
panel of which an outer surface is substantially plane and an inner surface has a predetermined curvature; and
a mask for selecting colors of electron beams incident from inside of the panel,
in which a formula, 0.3≦(Rxe/Rxc)≦0.75 is satisfied,
wherein Rxe is an inner curvature radius at an edge of a long axis of the panel, and Rxc is an inner curvature radius at a center of a long axis of the panel,
wherein a formula, 4.5≦(Rxc/USD)≦8.5 is satisfied, and
wherein the USD is a diagonal size of an effective surface of the panel.
8. A color cathode ray tube comprising:
a panel of which an outer surface is substantially plane and an inner surface has a predetermined curvature; and
a mask for selecting colors of electron beams incident from inside of the panel,
in which a formula, 0.3≦(Rxe/Rxc)≦0.75 is satisfied,
wherein Rxe is an inner curvature radius at an edge of a long axis of the panel, and Rxc is an inner curvature radius at a center of a long axis of the panel, and
wherein a transmission ratio of a center portion of the panel is 45%˜75%.
9. A color cathode ray tube comprising:
a panel of which an outer surface is substantially plane and an inner surface has a predetermined curvature; and
a mask for selecting colors of electron beams incident from inside of the panel,
in which a formula, 0.3≦(Rxe/Rxc)≦0.75 is satisfied,
wherein Rxe is an inner curvature radius at an edge of a long axis of the panel, and Rxc is an inner curvature radius at a center of a long axis of the panel, and
wherein an wedge ratio is 180%˜220%.
10. A color cathode ray tube comprising:
a panel of which an outer surface is substantially plane and an inner surface has a predetermined curvature; and
a mask for selecting colors of electron beams incident from inside of the panel,
in which a formula, 0.3≦(Rxe/Rxc)≦0.75 is satisfied,
wherein Rxe is an inner curvature radius at an edge of a long axis of the panel, and Rxc is an inner curvature radius at a center of a long axis of the panel,
wherein the mask is formed of either Fe—Ni based alloy or Fe—Ni—Co based alloy,
wherein a formula, 4.5≦(Rxc/USD)≦6.5 is satisfied, and
wherein USD is a diagonal size of an effective surface of the panel.
11. A color cathode ray tube comprising:
a panel of which an outer surface is substantially plane and an inner surface has a predetermined curvature; and
a mask for selecting colors of electron beams incident from inside of the panel,
in which a formula, 0.3≦(Rxe/Rxc)≦0.75 is satisfied,
wherein Rxe is an inner curvature radius at an edge of a long axis of the panel, and Rxc is an inner curvature radius at a center of a long axis of the panel,
wherein the masks is formed of either Fe—Ni based alloy or Fe—Ni—Co based alloy,
wherein a wedge ratio is 200% or more.
12. A color cathode ray tube comprising:
a panel of which an outer surface is substantially plane and an inner surface has predetermined curvature; and
a mask for selecting colors of electron beams incident from inside of the panel,
in which a formula, 0.3≦(Rxe/Rxc)≦0.75 is satisfied,
wherein Rxe is an inner curvature radius at an edge of a long axis of the panel, and Rxc is an inner curvature radius at a center of a long axis of the panel,
wherein a formula, Rxe≦Rde≦Rye is satisfied,
wherein Rye is an inner curvature radius at an edge of a short axis of the panel, and Rde is an inner curvature radius at an edge of a diagonal axis of the panel.
13. A color cathode ray tube comprising:
a panel of which an outer surface is substantially plane and an inner surface has predetermined curvature; and
a mask for selecting colors of electron beams incident from inside of the panel,
in which a formula, 0.3≦(Rxe/Rxc)≦0.75 is satisfied,
wherein Rxe is an inner curvature radius at an edge of a long axis of the panel, and Rxc is an inner curvature radius at a center of a long axis of the panel,
wherein the inner curvature radius is gradually decreased from a center portion of the panel towards a peripheral portion of the panel,
wherein a formula, Rxe≦Rde≦Rye is satisfied,
wherein Rye is an inner curvature radius at an edge of a short axis of the panel, and the Rde is an inner curvature radius at an edge of a diagonal axis of the panel.
14. The color cathode ray tube of claim 8 , wherein a formula, Rxe≦Rde≦Rye is satisfied,
wherein Rye is an inner curvature radius at an edge of a short axis of the panel, and Rde is an inner curvature radius at an edge of a diagonal axis of the panel.
15. A color cathode ray tube comprising:
a panel of which an outer surface is substantially plane and an inner surface has predetermined curvature; and
a mask for selecting colors of electron beams incident from inside of the panel,
in which a formula, 0.3≦(Rxe/Rxc)≦0.75 is satisfied,
wherein Rxe is an inner curvature radius at an edge of a long axis of the panel, and Rxc is an inner curvature radius at a center of a long axis of the panel,
wherein a formula 0.3≦(Rye/Ryc)≦0.5 is satisfied, and
wherein Rye is an inner curvature radius at an edge of a short axis of the panel, and the Ryc is an inner curvature radius at a center of a short axis of the panel.