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. 12, 2016
Filed:
Sep. 16, 2011
Akinori Nishimura, Ibaraki, JP;
Kozo Nakamura, Ibaraki, JP;
Hiroyuki Takemoto, Ibaraki, JP;
Takehito Fuchida, Ibaraki, JP;
Akinori Nishimura, Ibaraki, JP;
Kozo Nakamura, Ibaraki, JP;
Hiroyuki Takemoto, Ibaraki, JP;
Takehito Fuchida, Ibaraki, JP;
NITTO DENKO CORPORATION, Ibaraki-shi, JP;
Abstract
There is provided an extremely thin light diffusing film, which has strong light diffusibility, has suppressed backscattering, and is excellent in productivity. The light diffusing film includes: a first region having a first refractive index; a substantially spherical shell-shaped refractive index modulation region surrounding the first region; and a second region having a second refractive index, the region being positioned on a side of the refractive index modulation region opposite to the first region. The light diffusing film has a light diffusion half-value angle of 30° or more and a thickness of 4 μm to 25 μm, and satisfies the following expressions (1) and (2):0.011(30≦≦60)  (1)0.0275−0.99 (60<)  (2)where x represents the light diffusion half-value angle (°) and y represents a backscattering ratio (%), the expressions (1) and (2) each representing a relationship between a numerical value for the light diffusion half-value angle and a numerical value for the backscattering ratio.