The present invention relates to a computer program for preparing a printable gradation pattern.
Conventionally, it has been known to prepare a light guide plate used for a liquid crystal TV (television) for example by printing with an inkjet printer.
A light guide plate is composed of a transparent acrylic plate. A light guide plate is prepared by printing a gradation pattern having a color (white) for light reflection and diffused reflection on this acrylic plate. The gradation pattern printed on the printing face of the light guide plate is prepared using commercially-available drawing software with reference to the brightness distribution required for the light guide plate.
In order to prepare a light guide plate so that a desired brightness distribution is obtained, a gradation pattern for printing requires a complicated color density change. Thus, it has been not easy to prepare a complicated gradation pattern using commercially-available software.
It is an objective of the present invention to provide a gradation pattern preparation program by which a complicated gradation pattern can be prepared easily.
In order to achieve the above objective, the present invention is a gradation pattern preparation program to prepare a printable gradation pattern on a campus region set on a computer screen, wherein a computer is caused to function as:
a campus setting means for defining a region on which the gradation pattern is prepared,
a vertical and horizontal printing density control line generation means for displaying, on a campus face, vertical and horizontal printing density control lines in a net-like manner,
a vertical cross section line generation means for displaying a cross section image of the selected vertical printing density control line as a vertical cross section line on a vertical cross section line display screen,
a horizontal cross section line generation means for displaying a cross section image of the selected horizontal printing density control line as a horizontal cross section line on a horizontal cross section line display screen,
a printing density control point generation means for displaying, on the respective vertical and horizontal cross section lines, printing density control points for editing the respective vertical and horizontal cross section lines, and
a printing density control point shift means for changing, in accordance with the shift of the printing density control points, heights to reference lines of the respective vertical and horizontal cross section lines.
According to the present invention, the heights to the reference lines of the respective vertical and horizontal cross section lines define the color shading of the gradation pattern along corresponding vertical and horizontal printing density control lines.
Also according to the present invention, the printing density control points function as a reference point by which the color shading can be specified on the respective vertical and horizontal cross section lines and are provide with a handle that can be moved in an up-and-down direction with reference to the reference line.
According to the present invention, a vertical cross section line and a horizontal cross section line corresponding to the respective vertical and horizontal printing density control lines displayed on the campus can be set by an operation of the handle to have an arbitrary curve to thereby easily prepare a gradation pattern composed of a desired color shading. Furthermore, a work such as a minute adjustment can be also performed easily.
The following section will describe the configuration of the present invention in detail with reference to the attached drawings.
A program according to the present invention is composed of: a campus generation means 2 for specifying a region in which a gradation pattern is prepared; a printing density control point color setting means 6 for displaying the shading color of the printing density control point selected through a printing density control point color setting dialogue 4; a vertical printing density control line generation means 12 for displaying a vertical printing density control line 10 on a campus 8; a horizontal printing density control line generation means 16 for displaying a horizontal printing density control line 14 on the campus 8; a vertical printing density control line cross section line generation means 20 for displaying a cross section line 18 of the vertical printing density control line 10; a horizontal printing density control line cross section line generation means 24 for displaying a cross section line 22 of the horizontal printing density control line 14; a printing density control point generation means 28 for displaying printing density control points 26, 50, and 52 for editing the vertical and horizontal printing density control lines 10 and 14 as well as the respective cross section lines 18 and 22 through a campus screen 8a and cross section line display screens 34 and 36; a printing density control point shift means 42 for changing, in accordance with the shift of the printing density control points, the heights of the respective vertical and horizontal cross section lines to a reference line; an image interpolation means 30 for limiting pixels calculated based on image interpolation; an image output format generation means 32 for converting data to have a data format for outputting an image; a grid display means 40 for allowing a grid 38 to be displayed on the campus screen 8a as well as the cross section line display screens 34 and 36; an input/output interface section 44; an image printing means 46 for printing a campus region with a printer; and a control section 48 for controlling them.
This program is used by being installed in a computer.
Next, the operation of this program installed in the computer will be described in detail with reference to the flowchart shown in
This program is a tool to prepare a gradation pattern composed of a color shading to output and print an image so that the gradation shading can be edited in an arbitrary manner. The term “gradation” means a form in which the color shading changes gradually. The term “gradation pattern” means printed image data composed of a color shading. In the gradation pattern, the color density corresponds to a dot or pixel printing density and the color density can be changed in a range from 0% to 100%. In an actual printing, a position to be printed is specified based on the printer resolution and printing can be performed within an arbitrary range from 0 to 100% for example within the range. In the image displayed on the computer screen shown in
The printing density control point 26 functions as a reference point based on which a shading color can be specified and includes a movable handle. The printing density control lines 10 and 14 illustrate the vertical and horizontal printing density control lines of a mesh screen. The printing density control point color setting dialogue 4 is used to set the color of the selected printing density control point 26 (any one of CMYK). The cross section lines 18 and 22 of the printing density control lines 10 and 14 show the cross section images of the selected vertical and horizontal printing density control lines 10 and 14. As shown in
In this embodiment, K (black) among CMYK is used. The shading of black (i.e., density) is displayed by the height of the cross section line in a range from 0% to 100%. The left end of the reference line 23 shows a print starting position and the right end shows a print ending position. The same applies to the cross section line 18. The cross section line 18 of the vertical printing density control line 10 is a projection view of the printing density control line 10 to a plane that is vertical to the plane of the campus 8 and that is parallel to the printing density control line 10. The cross section line 22 of the horizontal printing density control line 14 is a projection view of the printing density control line 14 to a plane that is vertical to the plane of the campus 8 and that is parallel to the printing density control line 14. The gradation can be changed by changing the heights of the cross section lines 18 and 22.
In this program, the gradation color preparation is configured so that, as shown in
The vertical cross section line display screen 34 displays the cross section line 18 of the vertical printing density control line 10. The horizontal cross section line display screen 36 displays the cross section line 22 of the horizontal printing density control line 14 (Step S5). The respective cross section lines 18 and 22 are initially displayed at a 0% position as shown in
Furthermore, the campus screen 8a displays a gradation image (not shown) (Step S7) to update the cross section line 18 of the vertical printing density control line 10 and the cross section line 22 of the horizontal printing density control line 14 (Steps S8 and S9). Next, as shown in
When the handles of the desired printing density control points 50 and 52 are dragged and are moved in an up-and-down direction, the heights of the cross section lines 18 and 22 are changed as shown in
Next, as shown in
Calculating all pixels in a pixel processing may cause a delayed response. To prevent this, this program uses image interpolation to limit pixels to be calculated. Prepared image data is converted by the image output format generation means 32 to have a data format for image output. The prepared image data is printed by the image printing means 46 (Step S14).
As is clear from the above description, the vertical and horizontal printing density control line generation means 12 and 16, the vertical and horizontal printing density control line cross section line generation means 20 and 24, the printing density control point generation means 28, and the printing density control point shift means 42 constitute a cross section line editing means. The operator can use this cross section line editing means to adjust the point and handle of the printing density control point so that the cross section lines 18 and 22 can be set to an arbitrary curve.
The color specification described in the above description specifies a color on the display screen. Thus, a color actually printed is a color prepared by the printer. White is mainly used to print a light guide plate. However, the invention is not limited to this. Other colors capable of providing reflection such as yellow also can be used.
Number | Date | Country | Kind |
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2012-078984 | Mar 2012 | JP | national |
Filing Document | Filing Date | Country | Kind |
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PCT/JP2012/082524 | 12/14/2012 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
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WO2013/145462 | 10/3/2013 | WO | A |
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