| US 7,549,717 B2 | ||
| Reduction of dependence of color appearance on light source | ||
| Yuko Yamamoto, Nagano-ken (Japan) | ||
| Assigned to Seiko Epson Corporation, Tokyo (Japan) | ||
| Filed on Dec. 29, 2004, as Appl. No. 11/26,306. | ||
| Application 11/026306 is a division of application No. 10/655140, filed on Sep. 03, 2003, granted, now 6,851,794. | ||
| Application 10/655140 is a continuation of application No. 10/081244, filed on Feb. 21, 2002, granted, now 6,637,861. | ||
| Claims priority of application No. 2001-47776 (JP), filed on Feb. 23, 2001; and application No. 2001-143616 (JP), filed on May 14, 2001. | ||
| Prior Publication US 2005/0111020 A1, May 26, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B41J 2/255 (2006.01) | ||
| U.S. Cl. 347—15 [358/1.9; 358/1.2] | 2 Claims |
| 1. A method of printing images on a printing medium with the aid of a printing device capable of using multiple ink types,
comprising the steps of:
(a) preparing a black ink and multiple types of chromatic primary color inks, each having a cyan, magenta, or yellow hue;
and
(b) reproducing a gray color area using both the black ink and the multiple types of chromatic primary color inks when the
gray color area has a lightness level of about 150/255 or less.
|