US Patent Application 18354234. OPTICAL FILM AND ELECTROLUMINESCENCE DISPLAY DEVICE simplified abstract

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OPTICAL FILM AND ELECTROLUMINESCENCE DISPLAY DEVICE

Organization Name

FUJIFILM Corporation

Inventor(s)

Naoya Nishimura of Kanagawa (JP)

OPTICAL FILM AND ELECTROLUMINESCENCE DISPLAY DEVICE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18354234 titled 'OPTICAL FILM AND ELECTROLUMINESCENCE DISPLAY DEVICE

Simplified Explanation

The patent application describes an optical film and an electroluminescence display device that are designed to be used in a micro LED. The purpose of this invention is to prevent a decrease in transmittance and a change in tint when the film is viewed from an oblique angle.

  • The optical film contains a light absorption anisotropic layer that includes a dichroic coloring agent compound.
  • The light absorption anisotropic layer has an absorption axis that is perpendicular to the film's surface.
  • The alignment degree of the layer is 0.7 or greater at a wavelength of 530 nm.
  • The transmittances of the film at wavelengths of 460 nm, 530 nm, and 630 nm are measured at a 45° angle to the film's surface.
  • The relationship between the transmittances at these wavelengths must satisfy the conditions: 0.1 ≤ Tb/Tr ≤ 0.5 and 0.2 ≤ Tg/Tr ≤ 0.6.


Original Abstract Submitted

Provided is an optical film and an electroluminescence display device that suppress a decrease in transmittance of a front surface and suppress a change in tint in an oblique direction with respect to the front surface, in a case of being used in a micro LED. The optical film includes a light absorption anisotropic layer containing a dichroic coloring agent compound, in which the light absorption anisotropic layer has an absorption axis in a normal direction of the film and has an alignment degree of 0.7 or greater at 530 nm, and in a case where transmittances at 460 nm, 530 nm, and 630 nm in a direction of 45° with respect to the normal direction of the film are respectively defined as Tb, Tg, and Tr, relationships of Expressions 0.1≤Tb/Tr≤0.5 (1) and 0.2≤Tg/Tr≤0.6 (2) are satisfied.

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