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:
Dec. 05, 2006
Filed:
Jul. 24, 2002
Ichiro Fujieda, Tokyo, JP;
Ichiro Fujieda, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
To provide a diffractive optical element that allows simplification of a manufacturing process and reduction in manufacturing costs. A diffractive optical element includes a first transparent substrate having a pair of transparent interdigitated electrodes facing each other formed on its surface, a second transparent substrate, and a liquid crystal sandwiched therebetween. Alignment layers are formed on surfaces of the first and second transparent substrates facing the liquid crystal. Pads are provided on the transparent electrodes and electrically connected to an outside. A seal material and a liquid crystal sealing port are provided on the first transparent substrate. The seal material is formed into a partly cut rectangle, and the liquid crystal sealing port is formed at the cut portion of the rectangular seal material.