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:
Jul. 08, 2003
Filed:
Jul. 26, 2002
Teijin Limited, Osaka, JP;
Abstract
A biaxially oriented polyester film, an adhesive film, or a colored hard coat film for application to CRT or liquid crystal display devices to improve contrast and color purity, characterized in that the film contains a coloring matter; (1) a wavelength (X) of the maximum absorption peak of light in wavelengths of 540 to 630 nm is in the range of 560 to 610 nm; (2) a half band width of the maximum absorption peak of the light is not more than 80 nm; a value (T /T ), obtained by dividing a light transmittance (T ) at the wavelength (X) by a light transmittance (T ) at a wavelength of 540 nm, is less than 0.80; a value (T /T ), obtained by dividing a light transmittance (T ) at the wavelength of 620 nm by a light transmittance (T ) at a wavelength of 540 nm, is in the range of 0.5 to 1.5; and a value (T /T ), obtained by dividing a light transmittance (T ) at the wavelength of 450 nm by a light transmittance (T ) at a wavelength of 540 nm, is in the range of 0.5 to 1.5.