US4763194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selectable raster size for video display
Assignee: RCA Licensing Corp
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Filing: 1987-10-09
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Granted: 1988-08-09
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Expires: 2007-10-09
Abstract
Abstract Size control circuitry allows the selection of a number of different combinations of raster heights and widths for a video display apparatus. A raster size selection signal is decoded to determine one of a number of possible height and width combinations. The height is determined by varying the vertical size feedback signal to the vertical deflection circuits. The raster width is determined by varying the operation of a side pincushion correcting diode modulator circuit.
Inventors
- 👤 Peter D. Osman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/223
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
133 words
A video display apparatus including means for generating rasters having different horizontal and vertical deflection amplitudes comprising: means for receiving a digitally encoded signal; means for decoding said digitally encoded signal for generating one of a plurality of first signals in response to information embodied in said digitally encoded signal, each of said one of said first signals identifying a predetermined horizontal deflection amplitude, and for generating one of a plurality of second signals in response to information embodied in said digitally encoded signal, each of said one of said second signals identifying a predetermined vertical deflection amplitude; means for generating horizontal deflection current having a maximum amplitude determined in response to said first signals; and means for generating vertical deflection current having a maximum amplitude determined in response to said second signals.
Claim 2
Dependent Claim
133 words
A video display apparatus including means for generating rasters having different horizontal and vertical deflection amplitudes comprising: means for receiving a digitally encoded signal; means for decoding said digitally encoded signal for generating one of a plurality of first signals in response to information embodied in said digitally encoded signal, each of said one of said first signals identifying a predetermined horizontal deflection amplitude, and for generating one of a plurality of second signals in response to information embodied in said digitally encoded signal, each of said one of said second signals identifying a predetermined vertical deflection amplitude; means for generating horizontal deflection current having a maximum amplitude determined in response to said first signals; and means for generating vertical deflection current having a maximum amplitude determined in response to said second signals.
Claim 3
Dependent Claim
54 words
The arrangement defined in claim 1, wherein said means for generating horizontal deflection current comprises means for controlling said horizontal deflection amplitude in order to correct horizontal deflection distortion, said amplitude controlling means being responsive to said first signals for controlling said horizontal deflection amplitude in order to change the width of said rasters.
Claim 4
Dependent Claim
47 words
The arrangement defined in claim 1, wherein said means for generating vertical deflection current comprises means for controlling said vertical deflection amplitude, said amplitude controlling means being responsive to said second signals for controlling said vertical deflection amplitude in order to change the height of said rasters.
Claim 5
Dependent Claim
24 words
The arrangement defined in claim 3, wherein said means for generating vertical deflection current comprises feedback means for reducing undesirable variation in raster height.
Claim 6
Dependent Claim
31 words
The arrangement defined in claim 4, wherein said means for controlling said vertical deflection amplitude comprises means for selectively coupling impedance networks to said feedback means for changing said raster height.
Claim 7
Dependent Claim
80 words
In a video display apparatus, means for changing raster width comprising: means for receiving a digitally encoded signal; means for decoding said digitally encoded signal to generate a signal indicative of one of a plurality of predetermined raster widths; means for producing horizontal deflection current; means for controlling said horizontal deflection current in order to correct horizontal deflection distortion; means for modifying said current controlling means in response to said raster width indicative signal for producing said selected raster width.
Claim 8
Dependent Claim
80 words
In a video display apparatus, means for changing raster width comprising: means for receiving a digitally encoded signal; means for decoding said digitally encoded signal to generate a signal indicative of one of a plurality of predetermined raster widths; means for producing horizontal deflection current; means for controlling said horizontal deflection current in order to correct horizontal deflection distortion; means for modifying said current controlling means in response to said raster width indicative signal for producing said selected raster width.
Claim 9
Dependent Claim
23 words
The arrangement defined in claim 6, wherein said horizontal deflection current controlling means comprises a diode modulator circuit for correcting side pincushion distortion.
Claim 10
Dependent Claim
35 words
The arrangement defined in claim 7, wherein said means for modifying said horizontal deflection current controlling means comprises switchable current paths, one of said current paths selected in response to said raster width indicative signal.
Claim 11
Dependent Claim
24 words
The arrangement defined in claim 8, wherein the selection of one of said current paths controls the bias current to said diode modulator circuit.
Claim 12
Dependent Claim
96 words
In a video display apparatus, means for changing raster height comprising: means for receiving a digitally encoded signal; means for decoding said digitally encoded signal to generate a signal indicative of one of a plurality of predetermined raster heights; means for producing vertical deflection current; means, including feedback means for sampling said vertical deflection current in order to control the magnitude of said vertical deflection current; and means coupled to said sampling means for modifying said feedback means in response to said raster height indicative signal in order to produce selectable changes in said raster height.
Claim 13
Dependent Claim
96 words
In a video display apparatus, means for changing raster height comprising: means for receiving a digitally encoded signal; means for decoding said digitally encoded signal to generate a signal indicative of one of a plurality of predetermined raster heights; means for producing vertical deflection current; means, including feedback means for sampling said vertical deflection current in order to control the magnitude of said vertical deflection current; and means coupled to said sampling means for modifying said feedback means in response to said raster height indicative signal in order to produce selectable changes in said raster height.
Claim 14
Dependent Claim
21 words
The arrangement defined in claim 10, wherein said feedback modifying means changes the impedance of the vertical deflection current feedback path.
References Cited (Backward Citations)
GB994817A
Cited
US3235767A
Cited
GB1047269A
Cited
US3908083A
Cited
US4028726A
Cited
GB2023976A
Cited
US4385324A
Cited
US4254365A
Cited
US4394690A
Cited
GB2094114A
Cited
US4547708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |