US4259692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection kinescope and method of operation
Assignee: RCA Licensing Corp
•
Filing: 1979-10-22
•
Granted: 1981-03-31
•
Expires: 1999-10-22
Abstract
Abstract A projection kinescope comprises an evacuated envelope having a faceplate, a phosphor screen on the inner surface of the faceplate, and an electron gun. The electron gun generates a plurality of electron beams in a substantially vertical plane. The beams are directed to strike the screen at vertically-separated positions. A delay line is associated with an electron beam that is directed to strike the screen above another electron beam. The delay time of the delay line is sufficient to repeat the video information imparted by the electron beam first striking the same portion of the screen.
Inventors
- 👤 Ralph J. D'Amato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:35
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N5/7408
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
A projection kinescope comprising: an evacuated envelope having a faceplate and a single color-emitting continuous phosphor screen on the inner surface of the faceplate; an electron gun for generating a plurality of electron beams in a substantially vertical plane, the beams being directed to strike the screen at vertically-separated positions; and a delay line associated with one of the electron beams directed to strike the screen above another of the electron beams, the delay time of the delay line being sufficient to repeat the video information imparted by the electron beam first striking the same portion of the screen.
Claim 2
Dependent Claim
99 words
A projection kinescope comprising: an evacuated envelope having a faceplate and a single color-emitting continuous phosphor screen on the inner surface of the faceplate; an electron gun for generating a plurality of electron beams in a substantially vertical plane, the beams being directed to strike the screen at vertically-separated positions; and a delay line associated with one of the electron beams directed to strike the screen above another of the electron beams, the delay time of the delay line being sufficient to repeat the video information imparted by the electron beam first striking the same portion of the screen.
Claim 3
Dependent Claim
46 words
The projection kinescope as defined in claim 1, wherein the electron gun generates three vertically-aligned electron beams and the video signal controlling each of the two electron beams that strike the screen above the remaining electron beam is delayed a multiple of the horizontal scan period.
Claim 4
Dependent Claim
29 words
The projection kinescope as defined in claim 2, wherein the periods for delay of the video signals for the two electron beams are one and two horizontal scan periods.
Claim 5
Independent Claim
105 words
A method of operating a projection kinescope, comprising: projecting a plurality of vertically-aligned electron beams to strike a screen of said kinescope, wherein said electron beams are vertically spaced from each other when they strike said screen; starting at the top of said screen, scanning said beams horizontally across said screen a plurality of times with each successive scan being vertically lower on the screen; and delaying the video signals controlling the electron beams that strike said screen above the lowest electron beam a sufficient time period to repeat the video information imparted by the lowest electron beam to the same location of the screen.
Claim 6
Independent Claim
105 words
A method of operating a projection kinescope, comprising: projecting a plurality of vertically-aligned electron beams to strike a screen of said kinescope, wherein said electron beams are vertically spaced from each other when they strike said screen; starting at the top of said screen, scanning said beams horizontally across said screen a plurality of times with each successive scan being vertically lower on the screen; and delaying the video signals controlling the electron beams that strike said screen above the lowest electron beam a sufficient time period to repeat the video information imparted by the lowest electron beam to the same location of the screen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |