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:
Aug. 18, 2020
Filed:
Mar. 02, 2016
Uk Choi, Gyeonggi-do, KR;
Ju Won Kim, Seoul, KR;
Uk Choi, Gyeonggi-do, KR;
Ju Won Kim, Seoul, KR;
Other;
Abstract
A color generation deviceaccording to the present invention has a light source, and also has a linear polarizing means, a first birefringence mediumand a second birefringence mediumattached to each other in sequence in front of the light source. A display meansis provided which is distanced from the linear polarizing means, the first birefringence mediumand a second birefringence medium. The first birefringence meansis arranged for the principal axes thereof to be at angle of 45° or −45° with respect to the polarization direction aof the linear polarizing meansand the second birefringence mediumis arranged for the principal axes thereof to be the same as or perpendicular to polarization direction aof the linear polarizing meansand quarter wave plate is used therefor.