Cheil Industries Inc.

Eun Kyeong Seo

Dong Yoon Shin

Hae Ryong Chung

Kwang Ho Shin

Eun Su Park

Min Jung Kim

A Ra Jo

Mun Bo Ko

Yong Woon Kim

So Hee Yu

Ae Kyoung Kim

Il Woong Baek

Ki Ho Park

Jung Kyu Lee

A polarizing plate includes a polarizer and at least one protective film on at least one side of the polarizer. The protective film has an in-plane retardation (Re) of greater than about 10,000 nm at a wavelength of 550 nm, as calculated by Re=(nx&#x2212;ny)&#xd7;d, wherein nx and ny are indexes of refraction in x-axis and y-axis directions of the protective film, respectively, and d is a thickness of the protective film.

Polarizing plate and liquid crystal display including the same

A polarizing plate includes a polarizer having absorption and transmission axes, a protective film on an upper surface of the polarizer, a half-wavelength (&#x3bb;/2) retardation film on a lower surface of the polarizer, an adhesive layer on a lower surface of the half-wavelength (&#x3bb;/2) retardation film, and a quarter-wavelength (&#x3bb;/4) retardation film on a lower surface of the adhesive layer. An absolute orthogonal b-coordinate value based on a CIELAB color coordinate system of the polarizing plate may be approximately 3 or less when the polarizing plate is stacked with a reference polarizing plate having a degree of polarization of at least 99.9% such that an angle between the absorption axis of the polarizer and an absorption axis of a polarizer of the reference polarizing plate or an angle between the transmission axis of the polarizer and a transmission axis of the polarizer of the reference polarizing plate is 90&#xb0;.

Polarizing plate, method for preparing the same, and optical display apparatus including the same

A polarizing plate includes a polarizer, a first protective film attached to one side of the polarizer, and a second protective film attached to another side of the polarizer. A ratio between coefficients of thermal expansion of the first and second protective films, measured in a transverse direction (TD) at a temperature from about 25&#xb0; C. to about 120&#xb0; C., ranges from about 0.5 to about 2. A ratio between coefficients of thermal expansion of the first and second protective films measured in a machine direction (MD) at a temperature from about 25&#xb0; C. to about 120&#xb0; C. ranges from about 0.5 to about 2.

Polarizing plate and optical display device including the same

A polarizing plate includes a polarizer; and a protective film attached to at least one side of the polarizer via an adhesive layer. The adhesive layer is formed of a water-based adhesive including a polyvinyl alcohol resin, a zirconium compound, and an imine crosslinking agent. The polarizing plate has a variation in light transmittance (|B&#x2212;A|) from 0% to about 0.25% at wavelengths from 400 nm to 780 nm, where A is an average value of initial light transmittance of the polarizing plate at wavelengths from 400 nm to 780 nm, and B is an average value of light transmittance of the polarizing plate at wavelengths from 400 nm to 780 nm measured after the polarizing plate has been dipped in water of 25&#xb0; C. for 3 hours, followed by drying at 25&#xb0; C. for 2 hours.

Growing community of inventors

Uiwang-si, South Korea

Eun Kyeong Seo