Rendering sub-pixel precision characters having widths compatible with pixel precision characters
US6377262B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2000 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Apr 10, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0457
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Image data processing and image rendering methods and systems whereby images are displayed on display devices having pixels with separately controllable pixel sub-components. Images, such as text characters, are displayed on a display device with at least some features being rendered with sub-pixel precision. The displayed advance width of a character displayed with sub-pixel precision is compatible with the advance width of the character if it had instead been displayed with a conventional full pixel precision rendering process. Thus, characters are displayed with sub-pixel precision, resulting in improved resolution and readability, while the advance width and the corresponding size and spacing of the characters and the overall formatting of the document remains the same compared to documents and characters rendered using conventional full pixel precision processes. The sub-pixel precision rendering process also involves mapping spatially different sets of one or more samples of the image data to individual pixel sub-components rather than to full pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.