Sumitomo Chemical Company, Limited

Sumitomo Metal Industries, Inc.

Takuzo Okumura

Hitoshi Kikui

Toyokazu Okada

Nobuo Fukushima

Masataka Yanase

Tadayuki Ohmae

Yoshiaki Togawa

Shuji Kitamura

Mitsuyuki Okada

Haruo Hayashida

Yoshio Tadokoro

Yoshihiko Kitagawa

Yukikazu Uemura

Kazuaki Sakakura

Minoru Nishihara

Toshitsugu Kikuchi

Toshiaki Shiota

Hiroyuki Nagai

Kazuo Nakata

Hiroo Toya

A color liquid crystal display panel with improvements in brightness of display, viewing angle and workability which comprises a liquid crystal layer which is provided with two light-polarizing plates on opposite side as substrates. One of the light-polarizing plates is made, in the following order, from the light-polarizing layer, a color filter layer formed on the outside surface of a protective film layer, the protective film layer of non-rotary polarization polymer and a transparent conductive film layer formed on the inside surface of the protective film layer. The other light-polarizing plate is made in the following order, from the light-polarizing layer and a transparent conductive film layer.

Color liquid crystal displaying panels

The present invention relates to a high-performance light-polarizing film assuming a neutral gray wherein are adsorbed and oriented, in a polymer film, (A) iodine as a main polarizing coloring matter and additionally (B) a dichroism dye having a absorption characteristics and polarization characteristics in the low wavelength region of visible light and showing, when adsorbed and oriented together with iodine in a polymer film, a direction of transition moment substantically identical with that of iodine and/or a dichroism dye having absorption characteristics and polarization characteristics in the high wavelength region of visible light and showing, when adsorbed and oriented together with iodine in a polymer film, a direction of transition moment substantially identical with that of iodine. As compared with the prior iodine type light-polarizing films, the light-polarizing film obtained in the above-mentioned manner has a high light transmittance in the wavelength range of visible light, assumes a neutral gray and has a high polarizing co-efficient. Accordingly, it is effectively usable as a liquid crystal material for liquid crystal television and the like and effectively applicable to optical uses such as CRT filter and the like.

Light-polarizing film

A vibration-damping material consisting of two metal plates and a vibration-damping layer of thermoplastic resin interposed between the two metal plates, in which said thermoplastic resin has a percentage of wlongation at 20.degree. C. of 30% or more, preferably 50% or more, a peak temperature of dissipation factor (tan .delta.) in the range of -50.degree. C. to 130.degree. C., and a bonding strength toward the metal plates of 3 kg/cm or more as determined by 180.degree.-peeling test at 20.degree. C.

Vibration-damping material

Highly durable, light-polarizing film having neutral gray as well as high polarizing coefficient is provided. The film comprises a uniaxially stretched base polymer film of, for example, polyvinyl alcohol or derivatives thereof and at least two dichroism dyes adsorbed and orientated therein. The dichroism dyes are, for example, C.I. DIrect Yellow 12, C.I. Direct Black 17 and C.I. Direct Blue 202. The film is usable for display by liquid crystal. A boric-acid treatment is used to improve the polarization properties.

A light-polarizing plate for display use is improved in its humid, thermal and weather durabilities by controlling moisture content of a light-polarizing film made of polyvinylalcohol prior to be laminated with protector film and also by using as protector film a hydrophobic polymer film having low water vapor transmission.

Method of making a light-polarizing plate

Light-polarizing plate having excellent durability and production of the

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Growing community of inventors

Tokyo, Japan

Takuzo Okumura