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:
May. 21, 2002
Filed:
Nov. 12, 1999
William J. Hilliard, San Francisco, CA (US);
Jean-Pierre Huber, Neydens, FR;
E-Color, Inc., San Francisco, CA (US);
Abstract
A method for determining the optimal viewing angle of display, input, or output devices with limited viewing, output and/or sensing angle characteristics including a test pattern displayed on a display screen. Test pattern is displayed on display screen and includes one or more test elements having levels of gray different from the gray shown in background. Once initiated, viewer evaluates test pattern to determine if display screen is positioned at an optical viewing angle to the viewer. In particular, one set of test elements has a luminance just below background and the other set of test elements has a luminance just above background. To determine the optimal viewing angle, a viewer evaluates test pattern determine the difference in gray levels between test elements against background. The viewer then adjusts the position of display screen until test elements either blend in with background or provide the largest contrast with background. Where a very low luminance or a very high luminance background is utilized, the optimal viewing angle is determined by adjusting display screen until test elements blend in with the background i.e., have the same luminance as the gray shading in background. Where a medium luminance background is utilized, the optimal viewing angle is determined when test elements appear to provide the largest contrast against background i.e., have a luminance maximally different from the gray shading in the background.