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:
Jun. 14, 2016
Filed:
Aug. 31, 2011
Dirk Brokken, Eindhoven, NL;
Hendrik DE Koning, Eindhoven, NL;
Wendy Mirelle Martam, Eindhoven, NL;
Floris Maria Hermansz Crompvoets, Eindhoven, NL;
Juergen Vogt, Eindhoven, NL;
Frank Vossen, Eindhoven, NL;
Dirk Brokken, Eindhoven, NL;
Hendrik De Koning, Eindhoven, NL;
Wendy Mirelle Martam, Eindhoven, NL;
Floris Maria Hermansz Crompvoets, Eindhoven, NL;
Juergen Vogt, Eindhoven, NL;
Frank Vossen, Eindhoven, NL;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
An actuator comprises an electroactive polymer layer () and a stretchable electrode structure () disposed at a first side of the electroactive polymer layer and further a counter electrode layer () disposed on a second side of the electroactive polymer layer, wherein the ratio Y/Yof the elastic modulus Yof the counter electrode layer and the elastic modulus Yof the electroactive polymer layer is at least 10. When compressed transversally by the electrodes, the electroactive polymer will expand tangentially and the actuator will relax into a shape wherein the interior of the electroded region is substantially recessed parallel to the plane of the device, while a substantial portion of the area increase is absorbed by out-of-plane bends arising at the electrode boundary (duck mode). The invention can be embodied as optically reflective or refractive devices with variable geometry.