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. 23, 2007
Filed:
Jul. 15, 2004
Brian D. Cull, Glendale, AZ (US);
Allan E. Harris, Phoenix, AZ (US);
Elias S. Haim, Glendale, AZ (US);
Brent D. Larson, Cave Creek, AZ (US);
Brian D. Cull, Glendale, AZ (US);
Allan E. Harris, Phoenix, AZ (US);
Elias S. Haim, Glendale, AZ (US);
Brent D. Larson, Cave Creek, AZ (US);
Honeywell International, Inc., Morristown, NJ (US);
Abstract
Methods and apparatus are provided for projecting light carrying a data image. The apparatus comprises a first layer having regions of electrically alterable variable light transmittance adapted to form the data image, and a hollow cavity backlight having a light exiting surface coupled to the first layer and adapted to provide light to the first layer through the light exiting surface from one or more light emitters some of which point in a principal direction other than at right angles to the light exiting surface. In a preferred embodiment, LEDs are used as the light emitters and are preferably mounted on one or more printed circuit boards or other support tilted at non-zero angles with respect to the light exiting surface.