Image display device, electronic apparatus having same, and image display method
AssigneesKing Jim Co., Ltd., Seiko Epson Corporation
InventorsKenichi Tanabe, Hiroshi Ono, Yoshiharu Konishi, Hitoshi Hayama
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Abstract
A monochrome display device easily and clearly distinguishes a multicolored character image from a multicolored background image by employing four gradations of monochrome. First and second monochrome gradations are assigned to any respective non-colored and colored elements of the background image and third and fourth monochrome gradations are assigned to any respective non-colored and colored elements of the character image to display a composite image of the background image and the character image.
Claims8
An image display device comprising:
- means for displaying in monochrome a color-printable background image and a color-printable character image superposed on said background image;
- and
- gradation control means for assigning a first gradation of the monochrome and a second gradation of the monochrome to any respective non-colored and colored elements of said background image, and assigning a third gradation of the mononochrome and a fourth gradation of the monochrome to any respective non-colored and colored elements of said character image to display a composite image of said background image and said character image;
- wherein said gradation control means set each of said first, second, third and fourth gradations exclusively to one of a negative monochrome gradation, a dark monochrome gradation, a light monochrome gradation and a positive monochrome gradation, not necessarily in the stated order;
- said negative, dark, light and positive monochrome gradations being clearly distinguishable from each other.
An image display method for displaying a color-printable background image and a color-printable character image superposed on said background image on a monochrome display having four gradations of monochrome, comprising the steps of:
- assigning a first gradation of the monochrome to any non-colored display elements of said background image;
- assigning a second gradation of the monochrome to any colored display elements of said background image;
- assigning a third gradation of the monochrome to any non-colored display elements of said character image;
- and
- assigning a fourth gradation of the monochrome to any colored display elements of said character image;
- wherein the first, second, third and fourth gradations are set exclusively to one of a negative monochrome gradation, a dark monochrome gradation, a light monochrome gradation and a positive monochrome gradation, not necessarily in the stated order;
- the negative, dark, light and positive monochrome gradations being clearly distinguishable from each other.
Dependencies are inferred from the claim text.