Patent US2052167A successfully refreshed from Google Patents.
EP0281054A2
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EP
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Method and apparatus for displaying a pointer
Assignee: International Business Machines Corp
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Filing: 1988-02-29
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Granted: —
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Expires: 2008-02-29
Abstract
Abstract A perspective view of a pointer icon is displayed such that toward the middle of the display frame the icon appears to point toward the display surface, rather than toward an edge of the display frame. This creates an illusion that the icon, such as an arrowhead, is reversing its direction smoothly in three dimensional space. Although the display screen is only a two dimension surface, the multiple icons can readily be configured to be shown in perspective and, therefore, appear to be three dimensional, without the requirement for gray scale or half tone display technology. The invention is readily implemented with conventional monochromatic or color graphics hardware commonly available for personal computers.
Inventors
- 👤 Ronald Jay Lisle
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 05:36
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/048; G06F3/0481; G06F3/04812; G06F3/04817; G09; G09G; G09G5/00; G09G5/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
125 words
A method of displaying a pointer controlled by a pointing device on a screen of a visual display unit comprising the steps of determining an area of said screen at which said pointer is to be directed, addressing a pointer image which appears to have an axis thereof tilted toward a perpendicular orientation relative to said display screen when said determined area is near the centre of said screen; and, addressing a pointer image which appears to have an axis thereof tilted toward a parallel orientation relative to said display screen when said area is near the edge of said screen, whereby a perspective view of said pointer is desplayed in which the pointer appears to be pointing toward a surface plane of said screen.
Claim 2
Independent Claim
125 words
A method of displaying a pointer controlled by a pointing device on a screen of a visual display unit comprising the steps of determining an area of said screen at which said pointer is to be directed, addressing a pointer image which appears to have an axis thereof tilted toward a perpendicular orientation relative to said display screen when said determined area is near the centre of said screen; and, addressing a pointer image which appears to have an axis thereof tilted toward a parallel orientation relative to said display screen when said area is near the edge of said screen, whereby a perspective view of said pointer is desplayed in which the pointer appears to be pointing toward a surface plane of said screen.
Claim 3
Dependent Claim
45 words
A method as claimed in claim 1 wherein said step of determining further comprises: identifying from an intended vertical position of said pointer a row address of pointer images; and identifying from an intended horizontal position of said pointer a column address of pointer images.
Claim 4
Dependent Claim
29 words
A method as claim in claim 2 wherein said step of displaying further comprises: displaying said pointer from an image addressed by said row address and said column address.
Claim 5
Dependent Claim
44 words
A method as claimed in claim 3 wherein said step of displaying further comprises: offsetting the position of said pointer on said screen by a vertical and horizontal displacement depending on the position on said screen to which said pointer is to be directed.
Claim 6
Dependent Claim
30 words
A method as claimed in claim 4 wherein said row and column addresses are associated with a table for loading character addresses of pointer character into a display refresh buffer.
Claim 7
Dependent Claim
32 words
A method as claimed in claim 4 wherein said row and column addresses are associated with bit mapped font images which are directly loaded into a bit mapped, all points addressable display.
Claim 8
Dependent Claim
27 words
A method as claimed in claim 6 further comprising: superimposing a portion of said pointer over an image on said screen to which said pointer is directed.
Claim 9
Dependent Claim
108 words
A computer system having a keyboard, a visual display, and a pointing device, the improvement for displaying a pointer controlled by said pointing device on a screen of said visual display comprising: means for determining an area of said screen at which said pointer is to be directed; and means for displaying said pointer wherein an axis of said pointer is tilted more toward a perpendicular orientation relative to a surface plane of said screen when said pointer is displayed near the center of said screen and more toward a parallel orientation relative to said surface plane when said pointer is displayed near an edge of said screen.
Claim 10
Dependent Claim
108 words
A computer system having a keyboard, a visual display, and a pointing device, the improvement for displaying a pointer controlled by said pointing device on a screen of said visual display comprising: means for determining an area of said screen at which said pointer is to be directed; and means for displaying said pointer wherein an axis of said pointer is tilted more toward a perpendicular orientation relative to a surface plane of said screen when said pointer is displayed near the center of said screen and more toward a parallel orientation relative to said surface plane when said pointer is displayed near an edge of said screen.
Claim 11
Dependent Claim
44 words
A system as claimed in claim 8 further comprising: means for identifying from an intended vertical position of said pointer a row address of pointer images; and means for identifying from an intended horizontal position of said pointer a column address of pointer images.
Claim 12
Dependent Claim
31 words
A system as claimed in claim 9 wherein said means for displaying further comprises: means for displaying said pointer from an image addressed by said row address and said column address.
Claim 13
Dependent Claim
46 words
A system as claimed in claim 10 wherein said means for displaying further comprises: means for offsetting the position of said pointer on said screen by a vertical and horizontal displacement depending on the position on said screen to which said pointer is to be directed.
Claim 14
Dependent Claim
30 words
A system as claimed in claim 10 wherein said row and column addresses are associated with a table for loading character addresses of pointer character into a display refresh buffer.
Claim 15
Dependent Claim
32 words
A system as claimed in claim 10 wherein said row and column addresses are associated with bit mapped font images which are directly loaded into a bit mapped, all points addressable display.
Claim 16
Dependent Claim
29 words
A system as claimed in claim 13 further comprising: means for superimposing a portion of said pointer over an image on said screen to which said pointer is directed.
References Cited (Backward Citations)
No citation records indexed.
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