US5261031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for enlarging a trend graph
Assignee: Toshiba Corp
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Filing: 1990-04-09
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Granted: 1993-11-09
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Expires: 2010-04-09
Abstract
Abstract In an enlarged trend graph displaying method, a portion of an overall trend graph is enlarged so as to be displayed on a display screen subdivided into upper and lower reduced display sections and a middle enlarged display section. This enlarged trend graph displaying method comprises the steps of: calculating both a display area ratio of the middle enlarged display section to an overall display area of the screen for displaying the overall trend graph, and an enlargement ratio thereof, and also for calculating a reduction ratio of each of the upper and lower reduced display sections based upon the display area ratio and enlargement ratio of the middle enlarged display section; setting first data on the overall trend graph which has been enlarged by the enlargement ratio as a first virtual screen image indicative of the middle enlarged display section; setting second and third data on upper and lower portions of the overall trend graph which each has been reduced by the same reduction ratio as second and third virtual screen images representative of the upper and lower reduced display sections; scrolling a display position designating window for the first virtual screen image indicative of the middle enlarged display section, and simultaneously moving a viewport for the enlarged display section within the display screen in conjunction with the scrolling operation, whereby the overall trend graph is displayed on the display screen subdivided into the upper and lower reduced display sections and middle enlarged display section, and also the middle enlarged display section is moved within the display screen and displayed with having top priority with respect to displays for the upper and lower reduced display sections.
Inventors
- 👤 Hiroshi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:37
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/14; G09G1/16; G09G1/162; G06; G06F; G06F2203/00; G06F2203/048; G06F2203/04805
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
272 words
A method for enlarging a portion of an overall trend graph to be displayed on a display screen, said display screen being subdivided into upper and lower reduced display sections and a middle enlarged display section, said middle enlarged display section displaying an enlarged portion of said overall trend graph, said method comprising the steps of: calculating a reduction ratio of said upper and lower reduced display sections using a display area ratio of said middle enlarged display section to an overall display area of said display screen for displaying said overall trend graph and an enlargement ratio of said middle enlarged display section; setting, as a first virtual screen image, a first data representative of said overall trend graph which has been enlarged by said enlargement ratio; setting second and third data representative of upper and lower portions of said overall trend graph, each of which has been reduced by said calculated reduction ratio, as second and third virtual screen images representative of said upper and lower reduced display sections; scrolling a display-position designating window within said first virtual screen image, said designating window indicating said enlarged portion, and simultaneously moving said middle enlarged display section within said display screen in conjunction with said scrolling; and displaying said overall trend graph on said display screen subdivided into said upper and lower reduced display sections and said middle enlarged display section, wherein said middle enlarged display section is displayed in priority over displays for said upper and lower reduced display sections such that said enlarged portion of said trend graph is visible in said middle enlarged display section of said display screen.
Claim 2
Independent Claim
272 words
A method for enlarging a portion of an overall trend graph to be displayed on a display screen, said display screen being subdivided into upper and lower reduced display sections and a middle enlarged display section, said middle enlarged display section displaying an enlarged portion of said overall trend graph, said method comprising the steps of: calculating a reduction ratio of said upper and lower reduced display sections using a display area ratio of said middle enlarged display section to an overall display area of said display screen for displaying said overall trend graph and an enlargement ratio of said middle enlarged display section; setting, as a first virtual screen image, a first data representative of said overall trend graph which has been enlarged by said enlargement ratio; setting second and third data representative of upper and lower portions of said overall trend graph, each of which has been reduced by said calculated reduction ratio, as second and third virtual screen images representative of said upper and lower reduced display sections; scrolling a display-position designating window within said first virtual screen image, said designating window indicating said enlarged portion, and simultaneously moving said middle enlarged display section within said display screen in conjunction with said scrolling; and displaying said overall trend graph on said display screen subdivided into said upper and lower reduced display sections and said middle enlarged display section, wherein said middle enlarged display section is displayed in priority over displays for said upper and lower reduced display sections such that said enlarged portion of said trend graph is visible in said middle enlarged display section of said display screen.
Claim 3
Dependent Claim
34 words
A method as recited in claim 1, wherein said calculating step is carried out under the control of a central processing unit in accordance with a calculation program previously stored into a read-only memory.
Claim 4
Dependent Claim
25 words
A method as recited in claim 1, wherein said first virtual screen image is set into a first memory area of a window buffer memory.
Claim 5
Dependent Claim
37 words
A method as recited in claim 1, wherein said second and third virtual screen images representative of said upper and lower reduced display sections are set into second and third memory areas of a window buffer memory.
Claim 6
Dependent Claim
43 words
A method as recited in claim 1, wherein said display-position designating window within said first virtual screen image is scrolled by manipulating a scroll key, and said middle enlarged display section is moved within said display screen under control of a display controller.
Claim 7
Dependent Claim
31 words
A method as recited in claim 2, wherein said display area ratio and said enlargement ratio are previously stored in said read-only memory and are provided to said central processing unit.
Claim 8
Dependent Claim
271 words
A trend graph displaying apparatus for displaying said trend graph with an enlarged portion on a display screen subdivided into upper and lower reduced display sections and a middle enlarged display section, comprising: calculation means for calculating a reduction ratio of each of said upper and lower reduced display sections using a display area ratio of said middle enlarged display section to an overall display area of said display screen and an enlargement ratio of said middle enlarged display section; storage means for storing a first data representative of said overall trend graph which has been enlarged by said enlargement ratio as a first virtual screen image, and for storing second and third data representative of upper and lower portions of said overall trend graph, each being reduced by said reduction ratio, as second and third virtual screen images representative of said upper and lower reduced display sections, respectively; and scrolling means for scrolling a display-position designating window within said first virtual screen image to indicate a portion of said first virtual screen image to be displayed on said middle enlarged section as said enlarged portion and for simultaneously moving said middle enlarged display section within said display screen in conjunction with said scrolling; wherein said overall trend graph is displayed on said display screen subdivided into said upper and lower reduced display sections and said middle enlarged display section, and said middle enlarged display section is displayed in priority over displays for said upper and lower reduced display sections such that said enlarged portion of said trend graph is visible in said middle enlarged display section of said display screen.
Claim 9
Dependent Claim
271 words
A trend graph displaying apparatus for displaying said trend graph with an enlarged portion on a display screen subdivided into upper and lower reduced display sections and a middle enlarged display section, comprising: calculation means for calculating a reduction ratio of each of said upper and lower reduced display sections using a display area ratio of said middle enlarged display section to an overall display area of said display screen and an enlargement ratio of said middle enlarged display section; storage means for storing a first data representative of said overall trend graph which has been enlarged by said enlargement ratio as a first virtual screen image, and for storing second and third data representative of upper and lower portions of said overall trend graph, each being reduced by said reduction ratio, as second and third virtual screen images representative of said upper and lower reduced display sections, respectively; and scrolling means for scrolling a display-position designating window within said first virtual screen image to indicate a portion of said first virtual screen image to be displayed on said middle enlarged section as said enlarged portion and for simultaneously moving said middle enlarged display section within said display screen in conjunction with said scrolling; wherein said overall trend graph is displayed on said display screen subdivided into said upper and lower reduced display sections and said middle enlarged display section, and said middle enlarged display section is displayed in priority over displays for said upper and lower reduced display sections such that said enlarged portion of said trend graph is visible in said middle enlarged display section of said display screen.
Claim 10
Dependent Claim
53 words
A trend graph displaying apparatus as recited in claim 7, wherein said storage means includes a window buffer memory having a first memory area for said first virtual screen image, and second and third memory areas for said second and third virtual screen images representative of said upper and lower reduced display sections.
Claim 11
Dependent Claim
59 words
A trend graph displaying apparatus as recited in claim 8, further comprising: a display memory for temporarily storing said first data on said first virtual screen image, and said second and third data on said second and third virtual screen images, said first data and said second and third data being furnished from said window buffer for display purposes.
Claim 12
Dependent Claim
57 words
A trend graph displaying apparatus as recited in claim 7, wherein said scrolling means comprises: a pair of scroll keys for scrolling said display-position designating window within said first virtual screen image; and, a display controller for simultaneously moving said middle enlarged display section within said display screen in conjunction with said scrolling by said scroll keys.
Claim 13
Dependent Claim
55 words
A trend graph displaying apparatus as recited in claim 6, wherein said display area ratio of said middle enlarged display section is selected to be 1/2 of said overall display area of said display screen, said enlargement ratio thereof is selected to be 2, whereby each of said reduction ratios is calculated to be 2/3.
Claim 14
Dependent Claim
60 words
A trend graph displaying apparatus as recited in claim 7, wherein said calculation means includes: a read-only memory for previously storing a calculation program; and, a central processing unit for calculating said reduction ratio of each of said upper and lower reduced display sections based upon said display area ratio and said enlargement ratio in accordance with said calculation program.
Claim 15
Dependent Claim
38 words
A trend graph displaying apparatus as recited in claim 12, wherein said display area ratio and said enlargement ratio are previously stored in said read-only memory for use by said central processing unit for calculating said reduction ratio.
References Cited (Backward Citations)
US4847785A
Cited
US4893258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-08 | 1997-05-10 | 1997-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-08 | 2001-05-10 | 2001-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-08 | 2005-05-10 | 2005-11-09 | $7700.00 | Window Closed / Lapsed |