US3917902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television receiver with pattern generator
Assignee: Heath Co
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Filing: 1974-07-17
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Granted: 1975-11-04
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Expires: 1994-07-17
Abstract
Abstract A pattern generator for a color television receiver which utilizes a digital counter to count scanning lines and produce an output pulse every ninth and tenth scan. An oscillator coupled to the horizontal deflection voltage produces pulses at a repetition rate which is substantially higher than the scan frequency. The high frequency pulses from the oscillator are then combined with the output of the counter to produce either a crosshatch or a dot pattern on the screen. The crosshatch pattern is developed when both the oscillator and counter outputs are continually fed to the television video circuit, and the dot pattern is produced by coupling a signal to the video circuit only upon the simultaneous occurrence of both the oscillator and the counter pulse outputs.
Inventors
- 👤 John Emery Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:03
CPC Classifications
H; H04; H04N; H04N17/00; H04N17/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
148 words
In a television receiver having a normal video circuit and an associated picture tube, a pattern generator for being coupled thereto comprising: means for developing a first signal in synchronism with the electron beam scan of the picture tube for producing a generally parallel line display in a first direction, means for developing a second signal in synchronism with the electron beam scan of the picture tube for producing a generally parallel line display in a second perpendicular direction, gating means having a first function of continually coupling a pattern signal to the video circuit during the occurrence of either of said first and second signals, means for switching the function of said gating means to couple a pattern signal to the video circuit only during the simultaneous occurrence of both said first and second signals, and manual means for adding the pattern display to normal video display.
Claim 2
Dependent Claim
148 words
In a television receiver having a normal video circuit and an associated picture tube, a pattern generator for being coupled thereto comprising: means for developing a first signal in synchronism with the electron beam scan of the picture tube for producing a generally parallel line display in a first direction, means for developing a second signal in synchronism with the electron beam scan of the picture tube for producing a generally parallel line display in a second perpendicular direction, gating means having a first function of continually coupling a pattern signal to the video circuit during the occurrence of either of said first and second signals, means for switching the function of said gating means to couple a pattern signal to the video circuit only during the simultaneous occurrence of both said first and second signals, and manual means for adding the pattern display to normal video display.
Claim 3
Dependent Claim
39 words
A pattern generator in accordance with claim 1 wherein said gating means comprises a ''''NAND'''' gate and wherein said means for switching the function of said gating means comprises means for converting said ''''NAND'''' gate to a ''''NOR'''' gate.
Claim 4
Dependent Claim
42 words
A pattern generator in accordance with claim 1 wherein said first and second signals are coupled to different inputs of said gating means, said gating producing an output pattern signal where said first and second signals appear simultaneously at said different inputs.
Claim 5
Dependent Claim
36 words
A pattern generator in accordance with claim 1 wherein said means for developing said first signal comprises an oscillator and means for pulsing said oscillator with pulses from the horizontal deflection circuit of the television receiver.
Claim 6
Dependent Claim
30 words
A pattern generator in accordance with claim 4 wherein said means for developing said first signal includes means to clip the negative portions of the oscillations developed from said oscillator.
Claim 7
Dependent Claim
55 words
A pattern generator in accordance with claim 1 wherein said means for developing said second signal comprises a digital counter, means for coupling pulses to the counter from the horizontal deflection circuit of the television receiver, and said counter developing said second signal at the output thereof following a predetermined count of said horizontal pulses.
Claim 8
Dependent Claim
110 words
In a color television receiver having a normal video circuit and an associated picture tube together with horizontal and vertical scanning means, a built-in pattern generator comprising: means for producing a first video signal which is repetitive at a frequency substantially higher than the scan frequency and which is in synchronism therewith, a digital counter for counting horizontal scan lines and for producing a second video signal at least for the duration of a single scan following repetitive fixed counts, means for gating the first and second video signal to the picture tube to produce a matrix test pattern, and means to synchronize said counter with the vertical scan signal.
Claim 9
Dependent Claim
110 words
In a color television receiver having a normal video circuit and an associated picture tube together with horizontal and vertical scanning means, a built-in pattern generator comprising: means for producing a first video signal which is repetitive at a frequency substantially higher than the scan frequency and which is in synchronism therewith, a digital counter for counting horizontal scan lines and for producing a second video signal at least for the duration of a single scan following repetitive fixed counts, means for gating the first and second video signal to the picture tube to produce a matrix test pattern, and means to synchronize said counter with the vertical scan signal.
Claim 10
Dependent Claim
29 words
A pattern generator in accordance with claim 7 wherein the vertical deflection voltage of the color television receiver is used to reset the counter to zero during vertical retrace.
Claim 11
Dependent Claim
59 words
A pattern generator in accordance with claim 7 wherein said first and second signals are coupled to different terminals of said gating means when a dot pattern is desired and to the same terminal when a crosshatch pattern is desired and wherein means are provided to continually enable the other one of said terminals to produce said crosshatch condiTion.
Claim 12
Dependent Claim
148 words
In a television receiver having a normal video circuit and an associated picture tube, a pattern generator for being coupled thereto comprising: means for developing a first signal in synchronism with the electron beam scan of the picture tube for producing a generally parallel line display in a first direction, means for developing a second signal in synchronism with the electron beam scan of the picture tube for producing a generally parallel line display in a second perpendicular direction, gating means having a first function of continually coupling a pattern signal to the video circuit during the occurrence of either of said first and second signals, means for switching the function of said gating means to couple a pattern signal to the video circuit only during the simultaneous occurrence of both said first and second signals, and manual means for adding the pattern display to normal video display.
Claim 13
Dependent Claim
148 words
In a television receiver having a normal video circuit and an associated picture tube, a pattern generator for being coupled thereto comprising: means for developing a first signal in synchronism with the electron beam scan of the picture tube for producing a generally parallel line display in a first direction, means for developing a second signal in synchronism with the electron beam scan of the picture tube for producing a generally parallel line display in a second perpendicular direction, gating means having a first function of continually coupling a pattern signal to the video circuit during the occurrence of either of said first and second signals, means for switching the function of said gating means to couple a pattern signal to the video circuit only during the simultaneous occurrence of both said first and second signals, and manual means for adding the pattern display to normal video display.
Claim 14
Dependent Claim
36 words
A pattern generator in accordance with claim 10 wherein said means for developing said first signal comprises an oscillator and means for pulsing said oscillator with pulses from the horizontal deflection circuit of the television receiver.
Claim 15
Dependent Claim
55 words
A pattern generator in accordance with claim 10 wherein said means for developing said second signal comprises a digital counter, means for coupling pulses to the counter from the horizontal deflection circuit of the television receiver, and said counter developing said second signal at the output thereof following a predetermined count of said horizontal pulses.
Claim 16
Dependent Claim
42 words
A pattern generator in accordance with claim 10 wherein said first and second signals are coupled to different inputs of said gating means, said gating producing an output pattern signal where said first and second signals appear simultaneously at said different inputs.
Claim 17
Dependent Claim
53 words
A pattern generator in accordance with claim 13 wherein said means for switching the function of said gating means comprises means for switching both said first and second signals from said different inputs to the same input of said gating means and for continually applying an enabling signal to the other input thereof.
References Cited (Backward Citations)
US3592544A
Cited
US3404222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |