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:
Oct. 14, 2014
Filed:
Oct. 14, 2011
Arnett Ryan Weber, Waterloo, CA;
James Alexander Robinson, Elmira, CA;
Robert James Lowles, Waterloo, CA;
Derek Raymond Solven, San Jose, CA (US);
Kuo-feng Tong, Waterloo, CA;
Yun Seok Choi, Waterloo, CA;
Arnett Ryan Weber, Waterloo, CA;
James Alexander Robinson, Elmira, CA;
Robert James Lowles, Waterloo, CA;
Derek Raymond Solven, San Jose, CA (US);
Kuo-Feng Tong, Waterloo, CA;
Yun Seok Choi, Waterloo, CA;
BlackBerry Limited, Waterloo Ontario, CA;
Abstract
An optical navigation device, such as an optical navigation joystick or mouse, includes an internal redirector which may be separate or formed from material of a touch surface of the optical device. The redirector is disposed at an angle with respect to a plane of the touch surface, operative to reflect light which would otherwise strike the touch surface at a low angle and be internally reflected. The light may be reflected in a direction away from a light sensor of the device, reducing sensed internally reflected light, or may be reflected into the touch surface at a higher angle, potentially increasing a quantity of good signal. The redirector may also include portions which block light directly emitted from a light emitter, or reflected off other surfaces of the navigation device.