IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0023462
(2001-12-17)
|
우선권정보 |
DE-0063034 (2000-12-18) |
발명자
/ 주소 |
- Hergott, Stefan
- Vogel, Michael
- Knoche, Volker
- Kehlenbeck, Ralf
- Muhlke, Oliver
|
출원인 / 주소 |
|
대리인 / 주소 |
Nils H. Ljungman & Associates
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
1 |
초록
▼
There is now provided a television cathode ray tube having a faceplate, an electron gun means, and a glass funnel to configure the cathode ray tube as a wide-angle, shallow-depth, implosion-resistant television cathode ray tube. The glass funnel has a solder edge, a funnel throat, a parabolic area a
There is now provided a television cathode ray tube having a faceplate, an electron gun means, and a glass funnel to configure the cathode ray tube as a wide-angle, shallow-depth, implosion-resistant television cathode ray tube. The glass funnel has a solder edge, a funnel throat, a parabolic area and a funnel body and the external contour between the solder edge and the parabolic area along a first section which is defined by the direction of the diagonal of the television glass funnel is essentially a steeply descending straight line, along a second section which is defined by the direction of the major axis of the television glass funnel, is essentially a flat descending straight line, which descends steeply in a curve in the area of the solder edge, and along a third section which is defined by the direction of the small axis of the television glass funnel, is essentially a steeply descending straight line. The glass funnel is configured to minimize the height of the television cathode ray tube to position said deflection coil arrangement at a distance from the shadow mask to minimize errors of electron beams, to minimize the weight of the television cathode ray tube, and to minimize risk of implosion.
대표청구항
▼
There is now provided a television cathode ray tube having a faceplate, an electron gun means, and a glass funnel to configure the cathode ray tube as a wide-angle, shallow-depth, implosion-resistant television cathode ray tube. The glass funnel has a solder edge, a funnel throat, a parabolic area a
There is now provided a television cathode ray tube having a faceplate, an electron gun means, and a glass funnel to configure the cathode ray tube as a wide-angle, shallow-depth, implosion-resistant television cathode ray tube. The glass funnel has a solder edge, a funnel throat, a parabolic area and a funnel body and the external contour between the solder edge and the parabolic area along a first section which is defined by the direction of the diagonal of the television glass funnel is essentially a steeply descending straight line, along a second section which is defined by the direction of the major axis of the television glass funnel, is essentially a flat descending straight line, which descends steeply in a curve in the area of the solder edge, and along a third section which is defined by the direction of the small axis of the television glass funnel, is essentially a steeply descending straight line. The glass funnel is configured to minimize the height of the television cathode ray tube to position said deflection coil arrangement at a distance from the shadow mask to minimize errors of electron beams, to minimize the weight of the television cathode ray tube, and to minimize risk of implosion. B> where y1is a distance between the exterior surface and a visual image on a central axis of the faceplate panel and y2is a distance between the exterior surface and a visual image on a periphery of the faceplate panel. 7. A cathode ray tube of claim 1 wherein the shadow mask has a curvature radius Rs satisfying the following condition: 1.2R≤Rs≤4R where R=1.767×a diagonal width of the effective screen. 8. A cathode ray tube of claim 7 wherein a horizontal curvature radius of the shadow mask is identical to or less than a vertical curvature radius of the shadow mask. 9. A cathode ray tube of claim 1 wherein the shadow mask further satisfies the following condition: 0.75≤(Rs/Rp)×(PH/S/PH/C)≤1.20. 10. A cathode ray tube comprising: a faceplate panel comprising a substantially flat exterior surface and a substantially concave interior surface having a phosphor screen; a funnel sealed to the faceplate panel, the funnel having a neck portion; an electron gun mounted in the neck portion of the funnel; a shadow mask between the faceplate panel and the electron gun, the shadow mask having an effective electron beam-passing area comprising a plurality of apertures; and a deflection yoke around an outer periphery of the funnel; wherein the panel satisfies the following condition: 1.2R≤Rp≤8R where Rp is a curvature radius of the concave interior surface and R is 1.767×a diagonal width of an effective screen of the cathode ray tube; and wherein the apertures formed on a central portion of the shadow mask are dot-shaped, and the apertures formed on a peripheral portion of the shadow mask are oval-shaped and elongated along a horizontal axis of the shadow mask, the shadow mask satisfying the following condition: 0.6≤(Rs/Rp)×(bs/as)≤2.0 where "bs" is a horizontal radius of the apertures formed on the peripheral portion of the shadow mask, and "as" is a vertical radius of the apertures formed on the peripheral portion of the shadow mask. 11. A cathode ray tube of claim 10 wherein the concave interior surface has a curvature radius Rp satisfying the following condition: 1.2R≤Rp≤4R where R=1.767×the diagonal width of an effective screen of the cathode ray tube. 12. A cathode ray tube of claim 10 wherein a light transmissivity at a central portion of the panel is 85% or greater. 13. A cathode ray tube of claim 10 wherein the ratio of light transmission at a peripheral portion on a diagonal end of the phosphor screen to light transmission at a central portion of the phosphor screen is 0.85 or greater. 14. A cathode ray tube of claim 13 wherein a light transmissivity at a central portion of the panel is 85% or greater. 15. A cathode ray tube of claim 10 wherein the faceplate panel satisfies the following condition: y1-y2≤0 where y1is a distance between the exterior surface and a visual image on a central axis of the faceplate panel and y2is a distance between the exterior surface and a visual image on a periphery of the faceplate panel. 16. A cathode ray tube of claim 10 wherein the shadow mask has a curvature radius Rs satisfying the following condition: 1.2R≤Rs≤4R where R=1.767×the diagonal width of the effective screen. 17. A cathode ray tube of claim 16 wherein a horizontal curvature radius of the shadow mask is identical to or less than a vertical curvature radius of the shadow mask. 18. A cathode ray tube of claim 10 the shadow mask further satisfies the following condition: 0.9≤(Rs/Rp)×(bs/as)≤1.5. 19. A cathode ray tube comprising: a faceplate panel comprising a substantially flat exterior surface and a substantially concave interior surface having a phosphor screen; a funnel sealed to the faceplate panel, the funnel having a neck portion; an electron gun mounted in the neck portion of the funnel; a shadow mask between the faceplate panel and the electron gun, the shadow mask having a n effective electron beam-passing area comprising a plurality of apertures are formed; a deflection yoke placed around an outer periphery of the funnel; wherein the panel satisfies the following condition: 1.2R≤Rp≤8R where Rp is a curvature radius of the concave interior surface and R is 1.767×a diagonal width of an effective screen of the cathode ray tube; and the shadow mask satisfies the following condition: 0.8≤(Rs/Rp)×(PH/S/PH/C)×(bs/as)≤2.5 where Rs is a curvature radius of the shadow mask, PH/Cis a horizontal pitch of the apertures formed on a central portion of the shadow mask, PH/Sis a horizontal pitch of the apertures formed on a peripheral portion of the shadow mask, "bs" is a horizontal radius of the apertures formed on the peripheral portion of the shadow mask, and "as" is a vertical radius of the apertures formed on the peripheral portion of the shadow mask. 20. A cathode ray tube of claim 19 wherein the concave interior surface has a curvature radius Rp satisfying the following condition: 1.2R≤Rp≤4R where R=1.767×the diagonal width of an effective screen of the cathode ray tube. 21. A cathode ray tube of claim 19 wherein a light transmissivity at a central portion of the panel is 85% or greater. 22. A cathode ray tube of claim 19 wherein the ratio of light transmission at a peripheral portion on a diagonal end of the phosphor screen to light transmission at a central portion of the phosphor screen is 0.85 or greater. 23. A cathode ray tube of claim 22 wherein a light transmissivity at a central portion of the panel is 85% or greater. 24. A cathode ray tube of claim 19 wherein the faceplate panel satisfies the following condition: y1-y2≤0 where y1is a distance between the exterior surface and a visual image on a central axis of the faceplate panel and y2is a distance between the exterior surface and a visual image on a periphery of the faceplate panel. 25. A cathode ray tube of claim 19 wherein the shadow mask has a curvature radius Rs satisfying the following condition: 1.2R≤Rs≤4R where R=1.767×the diagonal width of the effective screen. 26. A cathode ray tube of claim 25 wherein a horizontal curvature radius of the shadow mask is identical to or less than a vertical curvature radius of the shadow mask. 27. A cathode ray tube of claim 19 wherein the shadow mask further satisfies the following condition: 1.0≤(Rs/Rp)×(PH/S/PH/C)×(bs/as)≤1.8. wer than that of the apex. 11. The electron source assembly of claim 9 further comprising a heat shield for insulating the emitter. 12. In an electron source assembly including a filament, an emitter attached to the filament at a junction and having an apex from which electrons are emitted, and a reservoir of material for coating the emitter to lower its work function, the improvement comprising the emitter extending from the junction in a direction away from the apex and a preponderance of the reservoir positioned on the emitter on the side of the junction opposite to that of the apex. 13. The electron source assembly of claim 12 in which the electron emitter comprises a Schottky emitter. 14. In an electron source assembly including a filament, an emitter attached to the filament at a junction and having an apex from which electrons are emitted, and a reservoir of material for coating the emitter to lower its work function, the improvement comprising the emitter extending from the junction in a direction away from the apex, the reservoir positioned on the emitter on the side of the junction opposite to that of the apex, and the portion of the emitter extending from the junction in a direction away from the apex contacting a base that conducts heat from the emitter. 15. The electron source assembly of claim 12 further comprising a base and in which the emitter is supported by the base. 16. In an electron source assembly including a base, a filament, an emitter attached to the filament at a junction and having an apex from which electrons are emitted, and a reservoir of material for coating the emitter to lower its work function, the improvement comprising: the emitter being supported on the side opposite the apex by a base comprising the same material as the reservoir and the reservoir being positioned on the emitter on between the junction and the base. 17. The electron source assembly of claim 12 in which the only heat conduction path to the emitter is through the filament. 18. The electron source assembly of claim 12 in which the reservoir is positioned a sufficient distance from the junction to produce an operating temperature at the reservoir less than that at the junction to increase the useful life of the electron emitter. 19. The electron source assembly of claim 12 in which the reservoir is positioned a sufficient distance from the junction to produce an operating temperature at the reservoir less than that at the apex to increase the useful life of the electron emitter. 20. The electron source assemb
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