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:
Jul. 22, 2014
Filed:
Aug. 28, 2007
Dongxue Wang, Palatine, IL (US);
Kevin W. Johnson, Mundelein, IL (US);
Zhiming Zhuang, Kildeer, IL (US);
Dongxue Wang, Palatine, IL (US);
Kevin W. Johnson, Mundelein, IL (US);
Zhiming Zhuang, Kildeer, IL (US);
Motorola Mobility LLC, Chicago, IL (US);
Abstract
An auto-focus camera () can include a lens (), a sensor () for detecting an image from the lens, a first liquid crystal layer () between the lens and the sensor, and a second liquid crystal layer () between the lens and the sensor and further orthogonally aligned to the first liquid crystal layer. The auto-focus camera can further include an integrated circuit programmed to drive the first liquid crystal layer and the second liquid crystal layer. The auto-focus camera can include a controller () programmed to control two orthogonally aligned liquid crystal layers. The liquid crystal layers can serve as an optical anti-alias filter using birefringence properties of the liquid crystal layers. The first liquid crystal layer and the second liquid crystal layer can be orthogonally aligned to achieve polarization insensitive operation of the auto-focus camera.