US 7,329,981 B2 · Optical filter and display apparatus with the same

Abstract

An optical filter applied to a display apparatus, disposes on a substrate with transparency and has a maximum absorption wavelength λ in a wavelength range of 575±20 nm in connection with a wavelength range from 450 to 650 nm. The optical filter satisfies a relationship, 0.65≦T1(λ)/T2(λ)≦0.90 where T1 (λ) is a transmittance at a central part of the substrate at the maximum absorption wavelength λ, and T2 (λ) is a transmittance at a peripheral part of the substrate at the maximum absorption wavelength λ. The optical filter also satisfies a relationship, 0.90≦(T1 (λ1)/T2 (λ1))/(T1 (λ)/T2 (λ))≦1.05 with respect to transmittances wherein λ1 is each wavelength 450 nm, 530 nm and 630 nm, and λ is the maximum absorption wavelength.

Claims7

Dependent claims

An optical filter disposed on a substrate with transparency and having a maximum absorption wavelength (λ) in a wavelength range of 575±20 nm in connection with a wavelength range from 450 to 650 nm,

wherein the optical filter is configured to satisfy a relationship,
0.65≦T1(λ)/T2(λ)≦0.90
where T1 (λ) is a transmittance at a central part of the substrate at said maximum absorption wavelength λ, and T2 (λ) is a transmittance at a peripheral part of the substrate at said maximum absorption wavelength λ, and
the optical filter is configured to satisfy a relationship,
0.90≦(T1(λ1)/T2(λ1))/(T1(λ)/T2(λ))≦1.05
with respect to transmittances at wavelengths λ1 and λ, wherein λ1 is each wavelength of 450 nm, 530 nm and 630 nm and λ is said maximum absorption wavelength.

3 more elements

Dependencies are inferred from the claim text.

Optical filter and display apparatus with the same

Life of this patent

Optical filter and display apparatus with the same

Life of this patent

Abstract

Claims7