Patent US3666882A successfully refreshed from Google Patents.
US3666882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color television pick-up device with synthesized luminence signal
Assignee: Panasonic Holdings Corp
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Filing: 1969-07-25
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Granted: 1972-05-30
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Expires: 1989-07-25
Abstract
Abstract A pick-up device composed of three, ''''red,'''' ''''green'''' and ''''blue'''' pick-up tubes without using any luminance signal pick-up tube, wherein a ''''green'''' signal is employed as a luminance signal in view of the fact that the ''''green'''' signal characteristic is represented by a curve similar to a human visibility curve, and wherein the apparent horizontal resolution can be prevented from being decreased even when signals available from the three pick-up tubes are deviated from each other due to unsatisfactory registration of these signals.
Inventors
- 👤 Shigeru Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:57
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/10; H04N23/13
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
A color television pick-up device comprising three pick-up tubes, one each for producing ''''red'''', ''''blue'''' and ''''green'''' signals, respectively; means, including a matrix circuit, for converting the outputs of said three pick-up tubes into a chrominance signal including two chrominance components; means, including first filter means and first low-pass filter means, for separating low-frequency components from said chrominance signal; means for separating a high frequency component from said ''''green'''' signal; and means for mixing said low-frequency components separated from said chrominance signal with said highfrequency component of said ''''green'''' signal.
Claim 2
Dependent Claim
90 words
A color television pick-up device comprising three pick-up tubes, one each for producing ''''red'''', ''''blue'''' and ''''green'''' signals, respectively; means, including a matrix circuit, for converting the outputs of said three pick-up tubes into a chrominance signal including two chrominance components; means, including first filter means and first low-pass filter means, for separating low-frequency components from said chrominance signal; means for separating a high frequency component from said ''''green'''' signal; and means for mixing said low-frequency components separated from said chrominance signal with said highfrequency component of said ''''green'''' signal.
Claim 3
Dependent Claim
74 words
A color television pick-up device according to claim 1, further comprising means for separating said high-frequency component from said ''''green'''' signal; said matrix circuit including means for producing a synthesized luminance signal from said ''''red'''', ''''blue'''' and ''''green'''' signals, means for separating a low-frequency component from said synthesized luminance signal; and means for composing said low-frequency component with said high-frequency component of said ''''green'''' signal, said composed signal being employed as a luminance signal.
Claim 4
Dependent Claim
80 words
A color television pick-up device according to claim 2, wherein said low-frequency component is separated from said synthesized luminance signal by a second low-pass filter, and said means for separating a high-frequency component from said ''''green'''' signal, comprise a circuit for delaying said ''''green'''' signal, a third low-pass filter for separating a low-frequency component from said ''''green'''' signal, and a subtractor for subtracting said low-frequency component from said delayed ''''green'''' signal to produce said high-frequency component of said ''''green'''' signal.
Claim 5
Dependent Claim
96 words
A color television pick-up device, comprising: three pick-up tubes for producing ''''red'''', ''''blue'''' and ''''green'''' signals, respectively; matrix circuit means for producing, from said ''''red'''', ''''blue'''' and ''''green'''' signals, a synthesized luminance signal and a chrominance signal having two chrominance components; means for separating a low-frequency component from said synthesized luminance signal; means for separating a high-frequency component from said ''''green'''' signal; and means for combining said low-frequency component of said synthesized luminance signal with said high-frequency component of said ''''green'''' signal to produce a combined signal, said combined signal being employed as a luminance signal.
Claim 6
Dependent Claim
96 words
A color television pick-up device, comprising: three pick-up tubes for producing ''''red'''', ''''blue'''' and ''''green'''' signals, respectively; matrix circuit means for producing, from said ''''red'''', ''''blue'''' and ''''green'''' signals, a synthesized luminance signal and a chrominance signal having two chrominance components; means for separating a low-frequency component from said synthesized luminance signal; means for separating a high-frequency component from said ''''green'''' signal; and means for combining said low-frequency component of said synthesized luminance signal with said high-frequency component of said ''''green'''' signal to produce a combined signal, said combined signal being employed as a luminance signal.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |