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. 25, 2007
Filed:
Jan. 13, 2006
Hee Sung Choi, Suwon, KR;
Ha Yong Jung, Suwon, KR;
Jae Young Bae, Suwon, KR;
Jong Yun Kim, Suwon, KR;
Jeong Ho Yoon, Sungnam, KR;
Young Gi Kim, Suwon, KR;
Bae Kyun Kim, Sungnam, KR;
Hee Sung Choi, Suwon, KR;
Ha Yong Jung, Suwon, KR;
Jae Young Bae, Suwon, KR;
Jong Yun Kim, Suwon, KR;
Jeong Ho Yoon, Sungnam, KR;
Young Gi Kim, Suwon, KR;
Bae Kyun Kim, Sungnam, KR;
Abstract
The invention provides a variable focus liquid lens using electrowetting, comprising a conductive first liquid and an insulating second liquid. At least one of the first liquid composed of electrolyte and the second liquid composed of insulating liquid contains a surfactant for reducing interfacial energy between the first and second liquids. An interfacial portion between the first and second liquids is gathered by surfactant to reduce driving voltage. The variable focus liquid lens according to the invention has about 50% lower driving voltage required for changing focus, ensuring stability of the two fluids.