Nitto-denko Corporation

Nippon Shokubai Co., Ltd.

Kanto Kobayashi

Youichirou Sugino

Nao Murakami

Kazuo Kitada

Kentarou Takeda

Toshiyuki Iida

Junichi Nagase

Kanji Nishida

Takaichi Amano

Naoki Tomoguchi

Narifumi Ueda

An end face of a polarization plate cut by laser becomes a substantially flat surface having only sloping micro waviness because of having been melted once to be solidified. Since the surface has few stress-concentrated parts that may cause microcracks, this prevents microcracks from easily being produced.

Microcrack free polarization plate

A polarizing plate of the present invention includes a polyvinyl alcohol-based polarizer and transparent protective films provided on both sides of the polarizer with an adhesive layer interposed between the polarizer and each transparent protective film, wherein the transparent protective film on one side comprises a lactone ring structure-containing (meth)acrylic resin and is a retardation plate having an in-plane retardation of 40 nm or more and/or a thickness direction retardation of 80 nm or more, and the transparent protective film on the other side has an in-plane retardation of less than 40 nm and a thickness direction retardation of less than 80 nm. The polarizing plate can satisfy durability and display uniformity (unevenness).

Polarizing plate, manufacturing method thereof, optical film and image display

There are provided a liquid crystal panel and a liquid crystal display apparatus each having an excellent screen contrast, a small color shift, and small display unevenness. The liquid crystal panel includes a liquid crystal cell, a first polarizer, a second polarizer, a protective layer, a first optical compensation layer and a second optical compensation layer. The protective layer has relationships of 0 nm&#x2266;&#x394;nd (550)&#x2266;10 nm and 0 nm&#x2266;Rth(550)&#x2266;20 nm. The first optical compensation layer has an absolute value of a photoelastic coefficient of 40&#xd7;10(m/N) or less, and has relationships of &#x394;nd(380)&#x3c;&#x394;nd(550)&#x3c;&#x394;nd(780), nx&#x3e;ny&#x2267;nz and 90 nm&#x2266;&#x394;nd(550)&#x2266;200 nm. The second optical compensation layer has relationships of Rth(380)&#x3e;Rth(550)&#x3e;Rth(780) and nx=ny&#x3e;nz.

Liquid crystal panel and liquid crystal display apparatus

Growing community of inventors

Ibaraki, Japan

Kanto Kobayashi