US 9,519,086 B2Granted

Anisotropic light diffusion film

AssigneeLintec Corporation

InventorsKentaro Kusama, Tomoo Orui, Kenta Tomioka, Satoru Shoshi

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Abstract

An anisotropic light diffusion film includes increased uniformity of the intensity of diffused light in the light diffusion angle region, and the light diffusion angle region has been effectively expanded. An anisotropic light diffusion film includes a first louver structure region and a second louver structure region, in which plural plate-shaped regions having different refractive indices are alternately arranged in parallel along any one direction along the film plane, sequentially from the lower side along the film thickness direction, and the anisotropic light diffusion film includes an overlapping louver structure region in which the upper end of the first louver structure region and the lower end of the second louver structure region overlap each other.

Claims11

Dependent claims

An anisotropic light diffusion film comprising a first louver structure region and a second louver structure region sequentially from the lower side along the film thickness direction, wherein each of the first louver structure region and the second louver structure region comprise plural plate-shaped regions having different refractive indices alternately arranged in parallel along any one direction along the film plane,

wherein the anisotropic light diffusion film comprises an overlapping structure region in which the upper end of the first louver structure region extends into the lower end of the second louver structure region so that the upper end of the first louver structure region and the lower end of the second louver structure region overlap each other in a cross-section of the anisotropic light diffusion film when the anisotropic light diffusion film is cut at a plane perpendicular to the plate-shaped regions in the first louver structure region and the second louver structure region.

Dependencies are inferred from the claim text.

Facts

Application: 14/372,269Filed 20 Dec 2012
Priority: JP 2012-00898419 Jan 2012
Published: US 2014/0340753 A120 Nov 2014
Granted: 13 Dec 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G02B 5/0257
Characterised by the diffusing properties: creating an anisotropic diffusion characteristic, i.e. distributing output differently in two…
G02B 5/021
Characterised by the diffusing properties: the diffusion taking place at the element's surface, e.g. by means of surface roughening or…
G02B 5/0236
Characterised by the diffusing properties: the diffusion taking place within the volume of the element
G02B 26/023
For controlling the intensity of light: comprising movable attenuating elements, e.g. neutral density filters

Family

US 2014/0340753 A1Pre-grant publication · published 20 Nov 2014
US 9,519,086 B2This patent

From the US filing history. Foreign family members aren’t listed.

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