Method of correcting skew between a digitizer and a digital display
US5115107A · kind A · utility
23Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1991 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Jan 11, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q20/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of producing an image drive signal which is free of skew. Disclosure is made of a point of sale merchandising system having a transparent digitizer mounted on an LCD module. A stylus is used to draw a signature on the digitizer, and the signature is displayed on the LCD module in registration with the moving stylus. Skew effects are eliminated by performing a mapping transformation using a set of 6 transformation constants. These constants are derived from data obtained while placing the stylus over three reference spots on the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.