The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2007
Filed:
Dec. 18, 2002
Nathan W. Everett, Bellevue, WA (US);
Nathan W. Everett, Bellevue, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A system and method determines an optimum size for a font for readability. A method determines font characteristics by determining a character density for the font and multiplying the character density by a sharpest focusable area of the viewing medium. The method further includes varying the character density according to a range in a number of clusters per fixation to determine a maximum font size and a minimum font size. In an embodiment, the character density is a ratio of a number of clusters per em in the font to a number of visible clusters within a predetermined foveal angle. The predetermined foveal angle can be a field of vision for sharpest focus of an eye or a reader specific foveal angle that reflects the reader's visual acuity, taking into consideration macular degeneration, vision impairments, vision sharpness, tunnel vision, eye disease, near sightedness, far sightedness, dyslexia, and astigmatism.