| 摘要 |
Provided is a liquid crystal display device including a liquid crystal cell 21, a backlight side polarizer 12, an optical thin film 1 which forms an air interface, and a backlight unit 31, in this order. The liquid crystal display device satisfies n (535)<nu (535) and n (535)×d is 1.15-1.25 μm, 1.42-1.52 μm or 1.69-1.79 μm in which n (535) and nu (535) represent a refractive index of the optical thin film and a layer directly adjacent to the optical thin film, respectively, and d represents a thickness of the optical thin film. The liquid crystal display device is capable of matching a peak of light transmittance to light emission peak wavelength of emission line light of RGB. |
| 主权项 |
1. A liquid crystal display device comprising:
a liquid crystal cell; a backlight side polarizer; an optical thin film which is disposed so as to be directly adjacent to a side of the backlight side polarizer opposite to the liquid crystal cell or is disposed with a substrate therebetween, and forms an air interface; and a backlight unit, in this order, wherein the liquid crystal display device satisfies the following Expression (1), wherein the liquid crystal display device satisfies any one of the following Expressions (2-1), (2-2), and (2-3), wherein all transmittances at a Y value of an XYZ color system in a wavelength range of 430 nm to 470 nm, in a wavelength range of 515 nm to 555 nm, and in a wavelength range of 600 nm to 650 nm of a laminated body constituted of the optical thin film and a layer directly adjacent to the optical thin film are greater than those at a Y value of an XYZ color system in a wavelength range of greater than 470 nm and less than 515 nm and in a wavelength range of greater than 555 nm and less than 600 nm, wherein the backlight unit emits blue light which has a light emission center wavelength in a wavelength range of 430 nm to 480 nm and has a peak of light emission intensity with a full width at half maximum of less than or equal to 100 nm, green light which has a light emission center wavelength in a wavelength range of 500 nm to 600 nm and has a peak of light emission intensity with a full width at half maximum of less than or equal to 100 nm, and red light which has a light emission center wavelength in a wavelength range of 600 nm to 650 nm and has a peak of light emission intensity with a full width at half maximum of less than or equal to 100 nm,
n(535)<nu(535) Expression (1) wherein in Expression (1), n (535) represents a refractive index of the optical thin film at a wavelength of 535 nm and nu (535) represents a refractive index of the layer directly adjacent to the optical thin film at a wavelength of 535 nm, and
1.15 μm≦n(535)×d≦1.25 μm Expression (2-1)1.42 μm≦n(535)×d≦1.52 μm Expression (2-2)1.69 μm≦n(535)×d≦1.79 μm Expression (2-3) wherein in Expressions (2-1), (2-2), and (2-3), n (535) represents a refractive index of the optical thin film at a wavelength of 535 nm, d represents a thickness of the optical thin film, and the unit is μm. |
