Character scrolling method and apparatus
US5477240A · kind A · utility
40Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1992 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Apr 7, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/346
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for scrolling, at a desired rate and in a given direction, a graphic character on a display having a predetermined number of actual scan lines and a vertical blanking interval occurring between successive display of all the actual horizontal scan lines of the display, involves the creation of fractional scan lines between successive vertical blanking intervals, the identification of leading and trailing edges of the character and the selective changing of the color or shading of pixels of the leading and trailing edges to effect scolling of the character.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.