Patent US3922713A successfully refreshed from Google Patents.
US3922713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unidirectional color enhancement circuit
Assignee: GTE Sylvania Inc
•
Filing: 1974-07-15
•
Granted: 1975-11-25
•
Expires: 1994-07-15
Abstract
Abstract In a television receiver having a luminance and color matrix system wherein first, second, and third color amplifier stages each have an output circuit providing a color signal, an input circuit coupled or connected to one of a plurality of color difference signal sources, and a second input circuit coupled by a drive circuit to a luminance signal source, a unidirectional color enhancement circuit includes at least one unidirectional conduction device and an impedance series coupling the second input circuits of at least two of the first, second, and third color amplifier stages.
Inventors
- 👤 Robert Charles Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:09
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/73
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
In a color television receiver having a luminance and color matrix system wherein first, second, and third color amplifier stages each have an output electrode coupled to a load circuit for applying a color signal to a cathode ray tube, an input electrode coupled to one of a plurality of color difference signal sources, and a second input electrode coupled by a drive circuit to a luminance signal source, the improvement comprising a unidirectional color enhancement circuit including a unidirectional conduction device and an impedance series coupling the second input electrode and drive circuit of two of said first, second, and third color amplifier stages.
Claim 2
Dependent Claim
105 words
In a color television receiver having a luminance and color matrix system wherein first, second, and third color amplifier stages each have an output electrode coupled to a load circuit for applying a color signal to a cathode ray tube, an input electrode coupled to one of a plurality of color difference signal sources, and a second input electrode coupled by a drive circuit to a luminance signal source, the improvement comprising a unidirectional color enhancement circuit including a unidirectional conduction device and an impedance series coupling the second input electrode and drive circuit of two of said first, second, and third color amplifier stages.
Claim 3
Dependent Claim
43 words
The improvement of claim 1 comprising a unidirectional color enhancement circuit having a unidirectional conduction device connected to enhance current flow from said first to said second color amplifier stages and inhibit current flow from said second to said first color amplifier stages.
Claim 4
Dependent Claim
44 words
The improvement of claim 1 comprising a unidirectional color enhancement circuit having a unidirectional conduction device connected to enhance current flow from said second to said third color amplifier stage and to inhibit current flow from said third to said second color amplifier stages.
Claim 5
Dependent Claim
56 words
The improvement of claim 1 wherein said color difference signal source in said chrominance channel is in the form of an integrated circuit, a unidirectional color enhancement circuit in the form of a unidirectional conduction device and impedance external to said integrated circuit and series coupling two of said first, second, and third color amplifier stages.
Claim 6
Dependent Claim
61 words
The improvement of claim 1 wherein said first, second, and third color amplifier stages of said luminance and color matrix system are red, green, and blue color amplifier stages respectively and the unidirectional color enhancement circuit in the form of a unidirectional conduction device and impedance series connected to enhance current flow from said red to said green color amplifier stages.
Claim 7
Dependent Claim
60 words
The improvement of claim 1 wherein said first, second, and third color amplifier stages of said luminance and color matrix system are red, green, and blue color amplifier stages respectively and the unidirectional color enhancement circuit in the Form of a unidirectional conductive device and impedance series connected to enhance current flow from said green to said blue amplifier stages.
Claim 8
Dependent Claim
81 words
In a color television receiver, a unidirectional color enhancement circuit comprising: first, second, and third color amplifier stages each having an output electrode coupled to load circuit for providing a color signal, an input electrode coupled to one of a plurality of color difference signal sources, and a second input electrode coupled to a drive circuit connected to a luminance signal source; and a unidirectional conductive device and impedance series coupling two of said first, second, and third color amplifier stages.
Claim 9
Dependent Claim
81 words
In a color television receiver, a unidirectional color enhancement circuit comprising: first, second, and third color amplifier stages each having an output electrode coupled to load circuit for providing a color signal, an input electrode coupled to one of a plurality of color difference signal sources, and a second input electrode coupled to a drive circuit connected to a luminance signal source; and a unidirectional conductive device and impedance series coupling two of said first, second, and third color amplifier stages.
Claim 10
Dependent Claim
36 words
The unidirectional color enhancement circuit of claim 7 wherein said second input electrodes of two of said first, second, and third color amplifier stages are coupled by a series connected unidirectional conduction device and an impedance.
Claim 11
Dependent Claim
50 words
The unidirectional color enhancement circuit of claim 7 wherein said first, second, and third color amplifier stages are red, green, and blue color amplifier stages respectively and said series connected unidirectional conduction device and impedance are coupled to enhance current flow from said red to said green color amplifier stages.
Claim 12
Dependent Claim
33 words
The unidirectional color enhancement circuit of claim 7 wherein two of said first, second, and third color amplifier stages are coupled by a plurality of series connected unidirectional conduction devices and an impedance.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |