Patent US5422654A successfully refreshed from Google Patents.
US5422654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data stream converter with increased grey levels
Assignee: Intel Corp
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Filing: 1994-03-18
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Granted: 1995-06-06
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Expires: 2014-03-18
Abstract
Abstract The present invention relates to An apparatus for converting cathode ray tube (CRT) to a dual panel data stream to be utilized. The present invention includes a frame buffer system for displaying data on a dual panel display, which comprises an upper and lower panel. The frame buffer system receives CRT data and displays panel refresh data in which one CRT frame generates one panel refresh frame. Through the use of this system, An increased number of gray level patterns can be provided, thereby increasing image resolution and quality.
Inventors
- 👤 Ignatius B. Tjandrasuwita
- 👤 James E. Margeson, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:55
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/2007; G09G3/2018; G06; G06F; G06F3/00; G06F3/14; G06F3/147; G06F3/1475; G09G5/00; G09G5/36; G09G5/363; G09G5/366; G09G5/39; H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G09G2310/00; G09G2310/02; G09G2310/0202; G09G2310/0221
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
236 words
A frame buffer system for displaying data on a dual panel display, the dual panel display including an upper panel and a lower panel, the frame buffer system for receiving a cathode ray tube (CRT) data frame having an upper half and a lower half, the frame buffer system for displaying current upper and lower panel refresh frames and next upper and lower panel refresh frames generated from the CRT data frame, the frame buffer system comprising: first means for generating a gray level pattern from the CRT data frame for the current upper and lower panel refresh frames; second means for generating a gray level pattern from the CRT data frame for the next upper and lower panel refresh frames; means coupled to the first generating means for providing the current upper panel refresh frame to the upper panel, responsive to a first state of a control signal and for providing the current lower panel refresh frame to the lower panel responsive to a second state of a control signal; means for delaying the next panel refresh frame; and means coupled to the second generating means and the delaying means for providing the delayed next lower panel refresh frame to the lower panel responsive to the first state of a control signal and for providing the delayed next upper panel refresh frame to the upper panel responsive to the second state of a control signal.
Claim 2
Dependent Claim
236 words
A frame buffer system for displaying data on a dual panel display, the dual panel display including an upper panel and a lower panel, the frame buffer system for receiving a cathode ray tube (CRT) data frame having an upper half and a lower half, the frame buffer system for displaying current upper and lower panel refresh frames and next upper and lower panel refresh frames generated from the CRT data frame, the frame buffer system comprising: first means for generating a gray level pattern from the CRT data frame for the current upper and lower panel refresh frames; second means for generating a gray level pattern from the CRT data frame for the next upper and lower panel refresh frames; means coupled to the first generating means for providing the current upper panel refresh frame to the upper panel, responsive to a first state of a control signal and for providing the current lower panel refresh frame to the lower panel responsive to a second state of a control signal; means for delaying the next panel refresh frame; and means coupled to the second generating means and the delaying means for providing the delayed next lower panel refresh frame to the lower panel responsive to the first state of a control signal and for providing the delayed next upper panel refresh frame to the upper panel responsive to the second state of a control signal.
Claim 3
Dependent Claim
33 words
The frame buffer system of claim 1 in which the current panel refresh frame providing means comprises a first multiplexer and the delayed next panel refresh frame providing means comprises a second multiplexer.
Claim 4
Dependent Claim
19 words
The frame buffer system of claim 1 in which includes: means for controlling the first and second providing means.
Claim 5
Dependent Claim
16 words
The frame buffer system of claim 1 in which the delaying means comprises a half-frame buffer.
Claim 6
Dependent Claim
31 words
The frame buffer system of claim 1 in which the first generating means and the second generating means generate the current panel refresh frame and the next panel refresh frame simultaneously.
Claim 7
Dependent Claim
244 words
A half frame buffer system for displaying data on a dual panel display, the dual panel display including an upper panel and a lower panel, the frame buffer system for receiving a cathode ray tube (CRT) data frame and the frame buffer system for displaying a current upper and lower panel refresh frames and next upper and lower panel refresh frames generated from the CRT data frame, the frame buffer system comprising: a first means for generating gray level patterns from the CRT data frame for the current upper and lower panel refresh frames; a second means for generating gray level patterns from the CRT data frame for the next upper and lower panel refresh frame; a half frame buffer coupled to the second means for delaying the next panel refresh frame; a first multiplexer for providing the current upper panel refresh frame to the upper panel responsive to a first state of a control signal and for providing the current lower panel refresh frame to the lower panel responsive to a second state of the control signal; and a second multiplexer means coupled to the half frame buffer for providing the delayed next upper panel refresh frame to the lower panel responsive to the first state of the first control signal and for providing the delayed next lower panel refresh frame to the lower panel responsive to a second state of the control signal during the lower half of the CRT data frame.
Claim 8
Dependent Claim
244 words
A half frame buffer system for displaying data on a dual panel display, the dual panel display including an upper panel and a lower panel, the frame buffer system for receiving a cathode ray tube (CRT) data frame and the frame buffer system for displaying a current upper and lower panel refresh frames and next upper and lower panel refresh frames generated from the CRT data frame, the frame buffer system comprising: a first means for generating gray level patterns from the CRT data frame for the current upper and lower panel refresh frames; a second means for generating gray level patterns from the CRT data frame for the next upper and lower panel refresh frame; a half frame buffer coupled to the second means for delaying the next panel refresh frame; a first multiplexer for providing the current upper panel refresh frame to the upper panel responsive to a first state of a control signal and for providing the current lower panel refresh frame to the lower panel responsive to a second state of the control signal; and a second multiplexer means coupled to the half frame buffer for providing the delayed next upper panel refresh frame to the lower panel responsive to the first state of the first control signal and for providing the delayed next lower panel refresh frame to the lower panel responsive to a second state of the control signal during the lower half of the CRT data frame.
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) | 1998-06-05 | 1998-12-05 | 1999-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-05 | 2002-12-05 | 2003-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-05 | 2006-12-05 | 2007-06-06 | $7700.00 | Window Closed / Lapsed |