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:
Jan. 23, 1990
Filed:
Oct. 25, 1988
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
The present invention relates to a high-performance light-polarizing film assuming a neutral gray wherein are adsorbed and oriented, in a polymer film, (A) iodine as a main polarizing coloring matter and additionally (B) a dichroism dye having a absorption characteristics and polarization characteristics in the low wavelength region of visible light and showing, when adsorbed and oriented together with iodine in a polymer film, a direction of transition moment substantically identical with that of iodine and/or a dichroism dye having absorption characteristics and polarization characteristics in the high wavelength region of visible light and showing, when adsorbed and oriented together with iodine in a polymer film, a direction of transition moment substantially identical with that of iodine. As compared with the prior iodine type light-polarizing films, the light-polarizing film obtained in the above-mentioned manner has a high light transmittance in the wavelength range of visible light, assumes a neutral gray and has a high polarizing co-efficient. Accordingly, it is effectively usable as a liquid crystal material for liquid crystal television and the like and effectively applicable to optical uses such as CRT filter and the like.