Rendering sub-pixel precision characters having widths compatible with pixel precision characters
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United States of America Patent
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Apr 23, 2002
Issued Date -
N/A
app pub date -
Apr 10, 2000
filing date -
Jul 30, 1999
priority date (Note) -
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status (Latency Note)
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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.
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