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:
Nov. 24, 1998
Filed:
Oct. 10, 1995
Stephen Rickard, Ruthin Clwyd, GB;
Pilkington P.E. Limited, St. Asaph, GB;
Abstract
A head-up display system comprising an optical combiner 5 for positioning in front of a pilot's head, in-line with the pilot's normal line of sight and in a plane substantially transverse to said line of sight. Sensor means, comprising a pair of optical sensors 9,10, is arranged to detect motion of the pilot's head towards the combiner 5 and to cause a trigger signal to be generated, prior to impact between the pilot's head and the combiner, if the velocity of said motion exceeds a threshold velocity. Retraction means 7 are coupled to the sensor means for receiving therefrom said trigger signal and are arranged, in response to receipt of said trigger signal, to retract the combiner 5 out of the trajectory of the pilot's head prior to impact between the head and the combiner.