US4998100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display control system
Assignee: ASCII Corp
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Filing: 1989-09-20
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Granted: 1991-03-05
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Expires: 2009-09-20
Abstract
Abstract A display control circuit system is disclosed which, while maintaining the compatibility of software perfectly, can realize various specifications of the software, provides for a gradation display in an LCD display to realize substantially the same level of access as in a CRT display, permits a configuration control, and, when one or more bits are expanded in the conventional software, can protect the function-expanded bit(s). The display control system includes a mode selector to select either a mode for controlling the display of CRT or a mode for controlling the display of LCD, a controller for controlling the CRT display, and a controller for controlling the LCD display control.
Inventors
- 👤 Takatoshi Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:58
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3685; G09G5/00; G09G5/18; H; H04; H04N; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G09G2310/00; G09G2310/02; G09G2310/0202; G09G2310/0221; G09G2310/0232; G09G3/2007; G09G3/2018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A display control system for a CRT or an LCD display in which a CRT or LCD display time slot and a CPU time slot exist alternately, characterized in that there is provided a time slot control means for controlling the rate of said CPU time slot relative to said CRT or LCD display time slot in accordance with the access speed of the CRT or LCD display wherein CPU operation is increased when said system is controlling an LCD display.
Claim 2
Dependent Claim
81 words
A display control system for a CRT or an LCD display in which a CRT or LCD display time slot and a CPU time slot exist alternately, characterized in that there is provided a time slot control means for controlling the rate of said CPU time slot relative to said CRT or LCD display time slot in accordance with the access speed of the CRT or LCD display wherein CPU operation is increased when said system is controlling an LCD display.
References Cited (Backward Citations)
US4388621A
Cited
US4468662A
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US4556879A
Cited
US4546350A
Cited
JPS5859490A
Cited
US4604615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-04 | 1994-09-03 | 1995-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-04 | 1998-09-03 | 1999-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-04 | 2002-09-03 | 2003-03-05 | $7700.00 | Window Closed / Lapsed |