Anisotropic light diffusing film and display device

• Main Authors: KATO, MASAO, ARASHIMA, JUNYA
• Format: Patent
• Language: Chinese; English
• Published: 16.01.2022
• Subjects: ADVERTISING; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; DISPLAYING; EDUCATION; FREQUENCY-CHANGING; LABELS OR NAME-PLATES; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; SIGNS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

The present invention provides an anisotropic light diffusing film which has a viewing angle dependence improving effect superior to the conventional ones with respect to brightness and color change depending on viewing angle. The anisotropic light diffusing film of the present invention has a linear transmittance changing in accordance to the incident angle of light, wherein the linear transmittance is (the amount of transmitted light of the incident light in the linear direction) / (the amount of light of the incident light). The anisotropic light diffusing film has a matrix region and a plurality of columnar regions having different refractive indexes from the matrix region. Further, the anisotropic light diffusing film has one scattering center axis, wherein in the inclination direction of the scattering center axis, the linear transmittance at an incident angle of 60DEG is 10% or less, and the diffusion transmittance of light at an incident angle of 0DEG in the polar angle of 60DEG is 0.001% or more.