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. 01, 1990
Filed:
Jul. 20, 1989
James McJunkin, San Diego, CA (US);
Other;
Abstract
A series of enhancements to a digitizing pad, information overlay and input selector, which are used as input devices for many computer-aided design programs, eliminating operator fatigue caused by conflicting lighting requirements, viewing levels and focusing distances required for the digitizing pad and computer screen. The use of fluorescent color for symbols on the information overlay, illuminated by black light, provides an information overlay which can be used in the same low light which is best for computer screen reading and which closely simulates the background and contrast of the computer screen. The active area of the input selector, called the window, is also outlined in fluorescent color to facilitate use in the low light environment. The information overlay is viewed through a mirror which can be adjusted to the same height as the computer screen. These enhancements create an information overlay which can be viewed in the same lighting environment at the same eye level, with the same contrast and the same focal length as the computer screen, but which may be operated without raising the hand or input selector off the desktop.