Claims
- 1. A color cathode ray tube comprising:
a panel portion comprising a faceplate portion and a skirt portion, the faceplate portion having a screen to display an image, the panel portion having a shadow mask installed therein; a neck portion accommodating an electron gun therein; and a funnel portion connecting the panel portion and the neck portion; wherein a relation RDO−tc<RDI holds, wherein, RDO is a radius of curvature connecting the center of the screen and the diagonal edge of the screen of the outer surface of the faceplate, RDI is a radius of curvature connecting the center of the screen and the diagonal edge of the screen of the inner surface of the faceplate, and tc is a thickness of the faceplate at the screen center; wherein a black matrix hole transmittivity in the diagonal direction peripheral areas is not greater than 110% of that of the central area.
- 2. A color cathode ray tube according to claim 1 wherein the black matrix hole transmittivity in the diagonal direction peripheral areas of the screen is smaller than that of the central area.
- 3. A color cathode ray tube comprising:
a panel portion comprising a faceplate portion and a skirt portion, the faceplate portion having a screen to display an image, the panel portion having a shadow mask installed inside thereof; a neck portion accommodating an electron gun therein; and a funnel portion connecting the panel portion and the neck portion; wherein a relation RHO−tc<RHI holds, wherein, RHO is a radius of curvature connecting the center of the screen and the edge of the major axis of the screen of the outer surface of the faceplate, RHI is a radius of curvature connecting the center of the screen and the edge of the major axis of the screen of the inner surface of the faceplate, and tc is a thickness of the faceplate at the screen center; wherein a black matrix hole transmittivity in the major-axis direction peripheral areas is not greater than 110% of that of the central area.
- 4. A color cathode ray tube according to claim 3, wherein the black matrix hole transmittivity in the major-axis direction peripheral areas of the screen is smaller than that of the central area.
- 5. A color cathode ray tube according to claim 1, wherein a relation RVO−tc≧RVI holds, wherein, RHO is a radius of curvature connecting the center of the screen and the edge of the major axis of the screen of the outer surface of the faceplate, RHI is a radius of curvature connecting the center of the screen and the edge of the major axis of the screen of the inner surface of the faceplate, and tc is a thickness of the faceplate at the screen center.
- 6. A color cathode ray tube according to claim 3, wherein a relation RVO−tc≧RVI holds, wherein, RVO is a radius of curvature connecting the center of the screen and the edge of the major axis of the screen of the outer surface of the faceplate, RVI is a radius of curvature connecting the center of the screen and the edge of the major axis of the screen of the inner surface of the faceplate, and tc is a thickness of the faceplate at the screen center.
- 7. A color cathode ray tube according to claim 1, wherein a light transmittivity of a material of the panel portion is almost equal to that of a tint having a light transmittivity of 56.8% when a glass thickness is 10.6 mm and a light wavelength of 546 nm is used.
- 8. A color cathode ray tube according to claim 3, wherein a light transmittivity of a material of the panel portion is almost equal to that of a tint having a light transmittivity of 56.8% when a glass thickness is 10.6 mm and a light wavelength of 546 nm is used.
- 9. A color cathode ray tube according to claim 1, wherein a light transmittivity of a material of the panel portion is almost equal to that of a dark tint having a light transmittivity of 46.0% when a glass thickness is 10.6 mm and a light wavelength of 546 nm is used.
- 10. A color cathode ray tube according to claim 3, wherein a light transmittivity of a material of the panel portion is almost equal to that of a dark tint having a light transmittivity of 46.0% when a glass thickness is 10.6 mm and a light wavelength of 546 nm is used.
- 11. A color cathode ray tube according to claim 1, wherein a diagonal size of the screen is at least approximately 46 cm.
- 12. A color cathode ray tube according to claim 3, wherein a diagonal size of the screen is at least approximately 46 cm.
- 13. A color cathode ray tube according to claim 11, wherein a dot pitch in the central area of the screen is not greater than approximately 0.26 mm.
- 14. A color cathode ray tube according to claim 12, wherein a dot pitch in the central area of the screen is not greater than approximately 0.26 mm.
- 15. A color cathode ray tube according to claim 1, wherein a deflection angle is at least approximately 100°.
- 16. A color cathode ray tube according to claim 3, wherein a deflection angle is at least approximately 100°.
- 17. A color cathode ray tube according to claim 1, wherein the shadow mask transmittivity in the diagonal direction peripheral areas of the screen is not greater than 110% of that of the central area.
- 18. A color cathode ray tube according to claim 1, wherein the shadow mask transmittivity in the diagonal direction peripheral areas of the screen is smaller than that of the central area.
- 19. A color cathode ray tube according to claim 1, wherein a dot pitch in the diagonal direction peripheral areas of the screen is not greater than 110% of that of the central area.
- 20. A color cathode ray tube according to claim 1, wherein the dot pitch in the diagonal direction peripheral areas of the screen is not greater than 105% of that of the central area.
- 21. A color cathode ray tube comprising:
a panel portion comprising a faceplate portion and a skirt portion, the faceplate portion having a screen to display an image, the panel portion having a shadow mask installed inside thereof; a neck portion accommodating an electron gun therein; and a funnel portion connecting the panel portion and the neck portion; wherein a relation RDO−tc≦RDI holds, wherein, RDO is a radius of curvature connecting the center of the screen and the edge of the major axis of the screen of the outer surface of the faceplate, RDI is a radius of curvature connecting the center of the screen and the edge of the major axis of the screen of the inner surface of the faceplate, and tc is a thickness of the faceplate at the screen center; wherein a black matrix hole transmittivity in the diagonal direction peripheral areas is between 70% and 110% of that of the central area.
- 22. A color cathode ray tube according to claim 21, wherein the black matrix hole transmittivity in the diagonal direction peripheral areas of the screen is between 90% and 110% of that of the central area.
- 23. A color cathode ray tube according to claim 21, wherein a relation RVO−tc≧RVI holds, wherein RVO is a radius of curvature connecting the center of the screen and the edge of the major axis of the screen of the outer surface of the faceplate, RVI is a radius of curvature connecting the center of the screen and the edge of the major axis of the screen of the inner surface of the faceplate, and tc is a thickness of the faceplate at the screen center.
- 24. A color cathode ray tube according to claim 21, wherein a light transmittivity of a material of the panel portion is almost equal to that of a tint having a light transmittivity of 56.8% when a glass thickness is 10.6 mm and a light wavelength of 546 nm is used.
- 25. A color cathode ray tube according to claim 21, wherein a light transmittivity of a material of the panel portion is almost equal to that of a dark tint having a light transmittivity of 46.0% when a glass thickness is 10.6 mm and a light wavelength of 546 nm is used.
- 26. A color cathode ray tube according to claim 21, wherein a diagonal size of the screen is at least approximately 46 cm.
- 27. A color cathode ray tube according to claim 21, wherein a dot pitch in the central area of the screen is at least approximately 0.26 mm.
- 28. A color cathode ray tube according to claim 21, wherein the shadow mask transmittivity in the diagonal direction peripheral areas of the screen is not greater than 110% of that of the central area.
- 29. A color cathode ray tl3be according to claim 21, wherein the shadow mask transmittivity in the diagonal direction peripheral areas of the screen is smaller than that of the central area.
- 30. A color cathode ray tube according to claim 21, wherein a dot pitch in the diagonal direction peripheral areas of the screen is not greater than 110% of that of the central area.
- 31. A color cathode ray tube according to claim 21, wherein the dot pitch in the diagonal direction peripheral areas of the screen is not greater than 105% of that of the central area.
Priority Claims (1)
Number |
Date |
Country |
Kind |
10-18547 |
Jan 1998 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This is a continuation of U.S. application Ser. No. 09/236,606, filed Jan. 26, 1999, the subject matter of which is incorporated by reference herein.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09236606 |
Jan 1999 |
US |
Child |
10385637 |
Mar 2003 |
US |