| US 7,554,615 B2 | ||
| Transparent hard coat film, transparent conductive hard coat film, touch panel using this film, and liquid crystal display device using this touch panel | ||
| Masahiro Harada, Tokyo (Japan); Masato Saitou, Saitama (Japan); Masuo Koyama, Ageo (Japan); and Yoshihisa Kimura, Saitama (Japan) | ||
| Assigned to Kimoto Co., Ltd., (Japan) | ||
| Filed on Mar. 12, 2003, as Appl. No. 10/385,641. | ||
| Claims priority of application No. 2002-071640 (JP), filed on Mar. 15, 2002. | ||
| Prior Publication US 2003/0174257 A1, Sep. 18, 2003 | ||
| Int. Cl. G02F 1/1335 (2006.01) | ||
| U.S. Cl. 349—12 [345/173; 178/18.01] | 24 Claims |
| 1. A transparent hard coat film having a transparent conductive thin layer on at least one surface thereof, said transparent
hard coat film comprising a transparent polymer film and a transparent hard coat layer provided at least on one surface of
said transparent polymer film,
wherein said transparent hard coat layer contains a colorant providing a combination consisting of the transparent polymer
film and the transparent hard coat layer on at least one surface thereof with a hue which is a color complementary to a hue
of said transparent conductive thin layer and a L* value of at least 90 in the CIE 1976 L*a*b* color space system, as measured
using transmitted light;
wherein the combination consisting of the transparent polymer film and the transparent hard coat layer on at least one surface
thereof has a b* value −4.0 or higher and less than 0, and an a* value −3.0 or higher and 1.5 or lower in the CIE 1976 L*a*b*
color space system, as measured using transmitted light; and
wherein the colorant provides the b* value.
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