초록 ▼

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, description="In-line

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, description="In-line Formulae" end="lead"0.65≦T1(λ)/T2 (λ)≦0.90description="In-line Formulae" end="tail" 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, description="In-line Formulae" end="lead"0.90≦(T1 (λ1)/T2 (λ1))/(T1 (λ)/T2 (λ))≦1.05description="In-line Formulae" end="tail" with respect to transmittances wherein λ1 is each wavelength 450 nm, 530 nm and 630 nm, and λ is the maximum absorption wavelength.

대표청구항 ▼

What is claimed is: 1. 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,

What is claimed is: 1. 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, description="In-line Formulae" end="lead"0.65≦T1(λ)/T2(λ) ≦0.90description="In-line Formulae" end="tail" 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, description="In-line Formulae" end="lead"0.90≦(T1(λ1)/T2(λ1)) /(T1(λ)/T2(λ))≦1.05 description="In-line Formulae" end="tail" 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. 2. The optical filter according to claim 1, wherein the optical filter includes a support member formed of a glass material or a high-polymer material, which has transparency. 3. The optical filter according to claim 1, wherein the optical filter has a stacked structure on the substrate, the stacked structure including a light-selective absorption filter layer having a maximum absorptance at the specified wavelength, and a neutral filter layer having a substantially constant transmittance in the wavelength range of 450-650 nm. 4. The optical filter according to claim 3, wherein the neutral filter layer has a less film thickness at the peripheral part of the substrate than at the central part of the substrate. 5. A display apparatus with an optical filter disposed on a display screen that displays an image, wherein the optical filter 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 is configured to satisfy a relationship, description="In-line Formulae" end="lead"0.65≦T1(λ)/T2(λ) ≦0.90description="In-line Formulae" end="tail" where T1 (λ) is a transmittance at a central part of the display screen at the maximum absorption wavelength λ, and T2 (λ) is a transmittance at a peripheral part of the display screen at the maximum absorption wavelength λ, and the optical filter is configured to satisfy a relationship, description="In-line Formulae" end="lead"0.90≦(T1(λ1)/T2(λ1)) /(T1(λ)/T2(λ))≦1.05 description="In-line Formulae" end="tail" 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. 6. The display apparatus according to claim 5, wherein the optical filter is disposed on an outer surface of a face panel that is formed of glass, the face panel having a phosphor screen on an inner surface thereof. 7. The display apparatus according to claim 6, wherein the outer surface of the face panel is substantially flat.