Simulating analog display slew rate intensity variations in a digital graphics display
US6246389A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1997 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Jun 3, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G1/162
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining an intensity value for a pixel in a display for displaying digitized waveforms. The intensity values simulate an analog display so that intensity at high slew rates about a point is lower than intensity at low slew rates about a point. Intensity may be computed as a function of slew rate. Alternatively, for speed, the absolute difference between waveform magnitudes at consecutive samples is used as an index into a pre-computed table of intensity values. As a result, for each sample, only a subtraction and a table look-up are needed to provide intensity variation. In an alternative embodiment, intensity values are higher at higher slew rates to accentuate rising and falling edges of digital waveforms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.