Browse Prior Art Database

Active Sun Spot Shielding System

IP.com Disclosure Number: IPCOM000111943D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 71K

Publishing Venue

IBM

Related People

Wilmer, TW: AUTHOR

Abstract

Disclosed is a system that addresses the problem of loss of vision on airplane/vehicle pilots/operators due to direct sunlight. Traditional sun visors, tinted glass, shaded helmet shields, etc., do not adequately deal with this problem. They are passive in nature and basically dim the entire view of the pilot equally thus reducing the intensity of the sun's rays but simultaneously limiting the rest of their field-of-view as well. If a method could be developed to actively isolate and move with the sun's position relative to the pilot and block/shield only the "spot" where the sun is, the problem would be addressed directly. This principle is similar to a solar eclipse when the whole sun is blocked from view by a very small object relative to the entire sky (i.e., the moon).

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Active Sun Spot Shielding System

      Disclosed is a system that addresses the problem of loss of
vision on airplane/vehicle pilots/operators due to direct sunlight.
Traditional sun visors, tinted glass, shaded helmet shields, etc., do
not adequately deal with this problem.  They are passive in nature
and basically dim the entire view of the pilot equally thus reducing
the intensity of the sun's rays but simultaneously limiting the rest
of their field-of-view as well.  If a method could be developed to
actively isolate and move with the sun's position relative to the
pilot and block/shield only the "spot" where the sun is, the problem
would be addressed directly.  This principle is similar to a solar
eclipse when the whole sun is blocked from view by a very small
object relative to the entire sky (i.e., the moon).  Vision
everywhere else is unaffected by such an eclipse, yet all of the
negative effects of the sun's glare/brightness are eliminated.  The
same phenomenon can be seen when driving in a car by taking a very
small object and putting it directly in line with the sun.  If the
object is moved as the sun's relative position to the car changes to
keep the sun blocked out, the negative effects of the sun can be
eliminated.  This invention simulates this technique.

      By installing a thin film type screen onto the windshield that
can be actively darkened in a size and coordinate location identified
by electrical or photo active/sensitive input, a system can be
developed in which a single darkened (or sun shielded) spot is moved
around the windshield to be always providing an "eclipse" effect for
the pilot; i.e., the one and only portion of the windshield that is
shaded is a small moving "spot" that is always directly in line
between the pilot's/operator's eyes and the sun.

      This type of operation could be accomplished in at least two
ways....