Polarizing plate
AssigneeLG Chem, Ltd.
InventorsSung Hyun Nam, Kyung Ki Hong, Yeong Rae Chang, Heon Kim, Kyun Il Rah, Jong Hyun Jung, Byung Sun Lee, Eung Jin Jang, Jin Yong Park, Deok Woo Park, Ji Young Kim
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Abstract
The present application relates to a polarizing plate and a display device. In the present application, a polarizing plate can be provided, which can be applied to a display device comprising a highly reflective panel to solve disadvantages while maintaining advantages of the device. In the present application, a display device comprising the polarizing plate and the highly reflective panel can also be provided.
Claims15
A polarizing plate applied to a display panel having a reflectance of 12% or more for light having a wavelength of 550 nm, wherein the polarizing plate has a K1 value calculated by Equation 1 below in a range of 0.9 to 1.1:
- K1=R1(450)/R1(650)+0.044×exp(0.43×bs) [Equation 1]
- wherein, bs is a single color of the polarizing plate, R1 (450) is a reflectance (unit:%) of the polarizing plate for light having a wavelength of 450 nm measured under a state where the polarizing plate is positioned on a reflective surface having a reflectance of 23% for light having a wavelength of 550 nm, and R1 (650) is a reflectance (unit:%) of the polarizing plate for light having a wavelength of 650 nm measured under a state where the polarizing plate is positioned on a reflective surface having a reflectance of 23% for light having a wavelength of 550 nm, and
- further satisfying at least one condition of the following conditions 1 to 4 and at least two conditions of Conditions 1 to 3:
- Condition 1:
- a −a value of 2 or less in CIE Lab color space;
- Condition 2:
- a b value of 4 or less in CIE Lab color space;
- Condition 3:
- a ratio (−b/a) of −a value and b value of 2.5 or less in CIE Lab color space;
- Condition 4:
- a −bc value of 0.05 to 40 in CIE Lab color space;
- and
- wherein the polarizing plate has a polarizer comprising a PVA-based film and an anisotropic absorbent material adsorbed and oriented on the PVA-based film.
A polarizing plate applied to a display panel having a reflectance of 12% or more for light having a wavelength of 550 nm, wherein the polarizing plate has a K2 value calculated by Equation 2 below in a range of 0.9 to 1.1:
- K2=R2(450)/R2(650)+0.0026×exp(1.09×bs) [Equation 2]
- wherein, bs is a single color of the polarizing plate, R2 (450) is a reflectance (unit:%) of the polarizing plate for light having a wavelength of 450 nm measured under a state where the polarizing plate is positioned on a reflective surface having a reflectance of 15% for light having a wavelength of 550 nm, and R2 (650) is a reflectance (unit:%) of the polarizing plate for light having a wavelength of 650 nm measured under a state where the polarizing plate is positioned on a reflective surface having a reflectance of 15% for light having a wavelength of 550 nm, and
- further satisfying at least one condition of the following conditions 1 to 4 and at least two conditions of Conditions 1 to 3:
- Condition 1:
- a −a value of 2 or less in CIE Lab color space;
- Condition 2:
- a b value of 4 or less in CIE Lab color space;
- Condition 3:
- a ratio (−b/a) of −a value and b value of 2.5 or less in CIE Lab color space;
- Condition 4:
- a −bc value of 0.05 to 40 in CIE Lab color space;
- and
- wherein the polarizing plate has a polarizer comprising a PVA-based film and an anisotropic absorbent material adsorbed and oriented on the PVA-based film.
A polarizing plate applied to a viewing side of a liquid crystal panel having a reflectance of 12% or more for light having a wavelength of 550 nm, wherein the polarizing plate has a K1 value calculated by Equation 1 below in a range of 0.9 to 1.1:
- K1=R1(450)/R1(650)+0.044×exp(0.43×bs) [Equation 1]
- wherein, bs is a single color of the polarizing plate, R1 (450) is a reflectance (unit:
- %) of the polarizing plate for light having a wavelength of 450 nm measured under a state where the polarizing plate is positioned on a reflective surface having a reflectance of 23% for light having a wavelength of 550 nm, and R1 (650) is a reflectance (unit:%) of the polarizing plate for light having a wavelength of 650 nm measured under a state where the polarizing plate is positioned on a reflective surface having a reflectance of 23% for light having a wavelength of 550 nm, and
- further satisfying at least one condition of the following conditions 1 to 4 and at least two conditions of Conditions 1 to 3:
- Condition 1:
- a −a value of 2 or less in CIE Lab color space;
- Condition 2:
- a b value of 4 or less in CIE Lab color space;
- Condition 3:
- a ratio (−b/a) of −a value and b value of 2.5 or less in CIE Lab color space;
- Condition 4:
- a −bc value of 0.05 to 40 in CIE Lab color space;
- and
- wherein the polarizing plate has a polarizer comprising a PVA-based film and an anisotropic absorbent material adsorbed and oriented on the PVA-based film.
Dependencies are inferred from the claim text.