US5018076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and circuitry for dual panel displays
Assignee: ASCII Corp
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Filing: 1988-09-16
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Granted: 1991-05-21
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Expires: 2008-09-16
Abstract
Abstract A data processing system includes a video controller and a flat panel display system. The flat panel display system includes first and second flat panel displays adapted so as to appear to be essentially a single display. The video controller includes a first and second address generator for generating first and second address information and a counter for counting vertical sync position to identify alternating first and second display frames. The controller outputs the first address information to drive the first display and the second address information to drive the second display during the first display frames and outputs the second address information to drive the first display and the first address information to drive the second display during the second display frames. The displays are identical and the address generators are identical. The use of dual displays with dual, flip-flopping address generators is more advantageous than using a single address generator to drive two display panels.
Inventors
- 👤 Arun Johary
- 👤 Tetsuji Oguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:09
CPC Classifications
G; G06; G06F; G06F17/00; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G2310/00; G09G2310/02; G09G2310/0202; G09G2310/0221
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
118 words
A data processing system comprising: a flat panel display system, including first and second flat panel displays adapted so as to appear to be essentially a single display; and a video controller including first and second address generators for generating first and second address information to drive said first and second displays, means for counting vertical sync position to identify first and second display frames, means for providing said first address information to drive said first display and said second address information to drive said second display during first display frames, and means for providing said second address information to drive said first display and said first address information to drive said second display during second display frames.
Claim 2
Dependent Claim
118 words
A data processing system comprising: a flat panel display system, including first and second flat panel displays adapted so as to appear to be essentially a single display; and a video controller including first and second address generators for generating first and second address information to drive said first and second displays, means for counting vertical sync position to identify first and second display frames, means for providing said first address information to drive said first display and said second address information to drive said second display during first display frames, and means for providing said second address information to drive said first display and said first address information to drive said second display during second display frames.
Claim 3
Dependent Claim
14 words
The data processing system of claim 1 and wherein said displays are substantially identical.
Claim 4
Dependent Claim
25 words
The data processing system of claim 1 and wherein the vertical sync count for determining a frame is determined by the size of said displays.
Claim 5
Dependent Claim
18 words
The data processing system of claim 1 and wherein said controller provides split screen capability for each display.
Claim 6
Dependent Claim
15 words
The data processing system of claim 1 and wherein said displays are liquid crystal displays.
Claim 7
Dependent Claim
18 words
The data processing system of claim 1 and wherein said first and second address generators are substantially identical.
Claim 8
Dependent Claim
133 words
A video controller for use in a data processing system, said processing system having a flat panel display system, said flat panel display system including first and second flat panel displays adapted so as to appear to be essentially a single display, said video controller comprising: first and second address generators for generating first and second address information to drive said first and second displays; means for counting vertical sync position to alternately identify first and second display frames; means for providing said first address information to drive said first display and said second address information to drive said second display during said first display frames; and means for providing said second address information to drive said first display and said first address information to drive said second display during second display frames.
Claim 9
Dependent Claim
133 words
A video controller for use in a data processing system, said processing system having a flat panel display system, said flat panel display system including first and second flat panel displays adapted so as to appear to be essentially a single display, said video controller comprising: first and second address generators for generating first and second address information to drive said first and second displays; means for counting vertical sync position to alternately identify first and second display frames; means for providing said first address information to drive said first display and said second address information to drive said second display during said first display frames; and means for providing said second address information to drive said first display and said first address information to drive said second display during second display frames.
Claim 10
Dependent Claim
12 words
The controller of claim 7 and wherein said displays are substantially identical.
Claim 11
Dependent Claim
23 words
The controller of claim 7 and wherein the vertical sync count for determining a frame is determined by the size of said displays.
Claim 12
Dependent Claim
16 words
The controller of claim 7 and further comprising for providing split screen capability for each display.
Claim 13
Dependent Claim
13 words
The controller of claim 7 and wherein said displays are liquid crystal displays.
Claim 14
Dependent Claim
13 words
The controller of claim 7 and wherein said address generators are substantially identical.
Claim 15
Dependent Claim
89 words
A video controller for use in a data processing system having a flat panel display system, said flat panel display system including N flat panel displays adapted so as to appear to be essentially a single display, said video controller comprising: N address generators for generating N sets of address information to drive said N displays, means for counting vertical sync position to identify display frames; and means responsive to said frame identification information for selectively driving said N displays using either of said N sets of address information.
Claim 16
Dependent Claim
89 words
A video controller for use in a data processing system having a flat panel display system, said flat panel display system including N flat panel displays adapted so as to appear to be essentially a single display, said video controller comprising: N address generators for generating N sets of address information to drive said N displays, means for counting vertical sync position to identify display frames; and means responsive to said frame identification information for selectively driving said N displays using either of said N sets of address information.
Claim 17
Dependent Claim
12 words
The controller of claim 13 and wherein said displays are substantially identical.
Claim 18
Dependent Claim
23 words
The controller of claim 13 and wherein the vertical sync count for determining a frame is determined by the size of said displays.
Claim 19
Dependent Claim
17 words
The controller of claim 13 and further comprising means for providing split screen capability for each display.
Claim 20
Dependent Claim
13 words
The controller of claim 13 and wherein said displays are liquid crystal displays.
Claim 21
Dependent Claim
13 words
The controller of claim 13 and wherein said address generators are substantially identical.
Claim 22
Dependent Claim
93 words
In the operation of a video controller for a data processing system having a dual panel display, a method of generating address information including the steps of: generating first and second address information; counting vertical sync information to identify first and second display frames; providing said first address information to drive said first display and said second address information to drive said second display during first display frames; and providing said second address information to drive said first display and said first address information to drive said second display during second display frames.
Claim 23
Dependent Claim
93 words
In the operation of a video controller for a data processing system having a dual panel display, a method of generating address information including the steps of: generating first and second address information; counting vertical sync information to identify first and second display frames; providing said first address information to drive said first display and said second address information to drive said second display during first display frames; and providing said second address information to drive said first display and said first address information to drive said second display during second display frames.
Claim 24
Dependent Claim
12 words
The method of claim 19 and wherein said displays are substantially identical.
Claim 25
Dependent Claim
23 words
The method of claim 19 and wherein the vertical sync count for determining a frame is determined by the size of said displays.
Claim 26
Dependent Claim
18 words
The method of claim 19 and wherein said controller operates to provide split screen capability for each display.
Claim 27
Dependent Claim
13 words
The method of claim 19 and wherein said displays are liquid crystal displays.
Claim 28
Dependent Claim
13 words
The method of claim 1 and wherein said address generators are substantially identical.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |