Color cathode ray tube
View Patent ↗The present invention provides A color cathode ray tube comprising: a panel having a flat outer surface and an inner surface that has a predetermined curvature; and a shadow mask, wherein B2 P2 ≤ B3 P3 where B1 is a length of a bridge as a distance between holes in a vertical direction at a center portion of the shadow mask; B2 is a length of a bridge as a distance between holes in a vertical direction at four corner portions of the shadow mask; B3 is a length of a bridge as a distance between holes at edge portions of the shadow mask in a direction of a long axis thereof; P1 is a vertical pitch of the holes at the center portion of the shadow mask; P2 is a vertical pitch of the holes at the four corner portions of the shadow mask; and P3 is a vertical pitch of the holes at the edge portions of the shadow mask in a direction of a long axis thereof.
1. A color cathode ray tube comprising:
a panel having a fluorescent surface therein;
a funnel coupled sealingly with the panel;
electron guns installed in the funnel, for projecting electron beams;
a deflection yoke for deflecting the electron beams; and
a shadow mask for selecting colors,
wherein the shadow mask satisfies the following condition:
B1
P1
≤
B2
P2
<
B3
P3
;
where B1 is a length of a bridge as a distance between holes in a vertical direction at a center portion of the shadow mask;
B2 is a length of a bridge as a distance between holes in a vertical direction at a corner portion of the shadow mask;
B3 is a length of a bridge as a distance between holes at edge portions of the shadow mask in a direction of a long axis thereof;
P1 is a vertical pitch of the holes at the center portion of the shadow mask;
P2 is a vertical pitch of the holes at a corner portion of the shadow mask; and
P3 is a vertical pitch of the holes at the edge portions of the shadow mask in a direction of a long axis thereof.
2. The color cathode ray tube according to claim 1 , wherein the shadow mask is made of an Aluminum Killed material.
3. The color cathode ray tube according to claim 1 , wherein an outer surface of the panel is substantially flat and an inner surface has a predetermined curvature.
4. The color cathode ray tube according to claim 1 , wherein the shadow mask satisfies the following conditions:
Rh<Rv, and
Rh<Rd,
where Rh is a mean curvature radius in the direction of the long axis of the shadow mask,
Rv is a mean curvature radius in a direction of a short axis thereof, and
Rd is a mean curvature radius in a diagonal direction thereof.
5. The color cathode ray tube according to claim 1 , wherein the shadow mask satisfies the following condition:
0.5 mm≦P1≦0.9 mm,
0.5 mm≦P2≦0.9 mm, and
0.5 mm≦P3≦0.9 mm.
6. A color cathode ray tube comprising:
a panel having a fluorescent surface therein;
a funnel coupled sealingly with the panel;
electron guns installed in the funnel, for projecting electron beams;
a deflection yoke for deflecting the electron beams; and
a shadow mask for selecting colors,
wherein the shadow mask satisfies the following condition:
B2
P2
<
B3
P3
and
B1
≤
B2
≤
B3
;
where B1 is a length of a bridge as a distance between holes in a vertical direction at a center portion of the shadow mask;
B2 is a length of a bridge as a distance between holes in a vertical direction at a corner portion of the shadow mask;
B3 is a length of a bridge as a distance between holes at edge portions of the shadow mask in a direction of a long axis thereof;
P2 is a vertical pitch of the holes at a corner portion of the shadow mask; and
P3 is a vertical pitch of the holes at the edge portions of the shadow mask in a direction of a long axis thereof.
7. The color cathode ray tube according to claim 6 , wherein the shadow mask satisfies the following condition:
0.10 mm≦B1≦0.18 mm,
0.10 mm≦B2≦0.18 mm, and
0.10 mm≦B3≦0.18 mm.
8. The color cathode ray tube according to claim 6 , wherein the shadow mask is made of an Aluminum Killed material.
9. The color cathode ray tube according to claim 6 , wherein the shadow mask satisfies the following conditions:
Rh<Rv, and
Rh<Rd,
where Rh is a mean curvature radius in the direction of the long axis of the shadow mask,
Rv is a mean curvature radius in a direction of a short axis thereof, and
Rd is a mean curvature radius in a diagonal direction thereof.
10. The color cathode ray tube according to claim 6 , wherein the shadow mask satisfies the following condition:
0.5 mm≦P1≦0.9 mm,
0.5 mm≦P2≦0.9 mm, and
0.5 mm≦P3≦0.9 mm,
where P1 is a vertical pitch of the holes at the center portion of the shadow mask.
11. A color cathode ray tube comprising:
a panel having a fluorescent surface therein;
a funnel coupled sealingly with the panel;
electron guns installed in the funnel, for projecting electron beams;
a deflection yoke for deflecting the electron beams; and
a shadow mask for selecting colors,
wherein the shadow mask satisfies the following condition:
B2
P2
<
B3
P3
and
P3
≤
P2
≤
P1
;
where B2 is a length of a bridge as a distance between holes in a vertical direction at a corner portion of the shadow mask;
B3 is a length of a bridge as a distance between holes at edge portions of the shadow mask in a direction of a long axis thereof;
P1 is a vertical pitch of the holes at the center portion of the shadow mask;
P2 is a vertical pitch of the holes at a corner portion of the shadow mask; and
P3 is a vertical pitch of the holes at the edge portions of the shadow mask in a direction of a long axis thereof.
12. The color cathode ray tube according to claim 11 , wherein the shadow mask is made of an Aluminum Killed material.
13. The color cathode ray tube according to claim 11 , wherein the shadow mask satisfies the following conditions:
Rh<Rv, and
Rh<Rd,
where Rh is a mean curvature radius in the direction of the long axis of the shadow mask,
Rv is a mean curvature radius in a direction of a short axis thereof, and
Rd is a mean curvature radius in a diagonal direction thereof.
14. The color cathode ray tube according to claim 11 , wherein the shadow mask satisfies the following condition:
0.5 mm≦P1≦0.9 mm,
0.5 mm≦P2≦0.9 mm, and
0.5 mm≦P3≦0.9 mm.
15. A color cathode ray tube comprising:
a panel having a fluorescent surface therein;
a funnel coupled sealingly with the panel;
electron guns installed in the funnel, for projecting electron beams;
a deflection yoke for deflecting the electron beams; and
a shadow mask for selecting colors,
wherein the shadow mask satisfies the following condition:
B2
P2
<
B3
P3
and
0.15
≤
B2
P2
≤
0.36
;
where B2 is a length of a bridge as a distance between holes in a vertical direction at a corner portion of the shadow mask;
B3 is a length of a bridge as a distance between holes at edge portions of the shadow mask in a direction of a long axis thereof;
P2 is a vertical pitch of the holes at a corner portion of the shadow mask; and
P3 is a vertical pitch of the holes at the edge portions of the shadow mask in a direction of a long axis thereof.
16. The color cathode ray tube according to claim 15 , wherein the shadow mask is made of an Aluminum Killed material.
17. The color cathode ray tube according to claim 15 , wherein the shadow mask satisfies the following conditions:
Rh<Rv, and
Rh<Rd,
where Rh is a mean curvature radius in the direction of the long axis of the shadow mask,
Rv is a mean curvature radius in a direction of a short axis thereof, and
Rd is a mean curvature radius in a diagonal direction thereof.
18. The color cathode ray tube according to claim 15 , wherein the shadow mask satisfies the following condition:
0.5 mm≦P1≦0.9 mm,
0.5 mm≦P2≦0.9 mm, and
0.5 mm≦P3≦0.9 mm,
where P1 is a vertical pitch of the holes at the center portion of the shadow mask.
19. A color cathode ray tube comprising:
a panel having a fluorescent surface therein;
a funnel coupled sealingly with the panel;
electron guns installed in the funnel, for projecting electron beams;
a deflection yoke for deflecting the electron beams; and
a shadow mask for selecting colors,
wherein the shadow mask satisfies the following condition:
B2
P2
<
B3
P3
and
0.15
≤
B2
P2
≤
0.36
;
where B2 is a length of a bridge as a distance between holes in a vertical direction at a corner portion of the shadow mask;
B3 is a length of a bridge as a distance between holes at edge portions of the shadow mask in a direction of a long axis thereof;
P2 is a vertical pitch of the holes at a corner portion of the shadow mask; and
P3 is a vertical pitch of the holes at the edge portions of the shadow mask in a direction of a long axis thereof.
20. The color cathode ray tube according to claim 19 , wherein the shadow mask is made of an Aluminum Killed material.
21. The color cathode ray tube according to claim 19 , wherein the shadow mask satisfies the following conditions:
Rh<Rv, and
Rh<Rd,
where Rh is a mean curvature radius in the direction of the long axis of the shadow mask,
Rv is a mean curvature radius in a direction of a short axis thereof, and
Rd is a mean curvature radius in a diagonal direction thereof.
22. The color cathode ray tube according to claim 19 , wherein the shadow mask satisfies the following condition:
0.5 mm≦P1≦0.9 mm,
0.5 mm≦P2≦0.9 mm, and
0.5 mm≦P3≦0.9 mm,
where P1 is a vertical pitch of the holes at the center portion of the shadow mask.