JPH0245902Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hidden character display device suitable for use in lottery tickets, etc., and more particularly to a hidden character display device in which it is impossible to determine what the hidden character is without using a line screen.

Conventionally, there are hidden characters using line patterns. This is a line pattern whose phase is changed to match the character shape that should be hidden, and by viewing this pattern through a line screen, characters hidden due to the moiré phenomenon can be visually identified. .

However, in such a conventional hidden character structure, the boundary part where the phase of the lines has changed is easily visible, and therefore, if you look closely, it is easy to distinguish the hidden characters. For example, when using a lottery, etc. This was inappropriate because the hidden characters were clearly visible.

The present invention has been developed in view of the drawbacks of conventional hidden characters, and the present invention has been developed to solve the problems of conventional hidden characters.
The outline of a block-shaped grapheme group that can display symbols, etc.
A grapheme group that is drawn with a line that is sufficiently wide for the line width of the line screen and that corresponds to the character or symbol that should be displayed within this grapheme group, and other characters,
Lines are placed at the same pitch as symbols, patterns, background colors, etc., but with different phases, and the characters to be displayed become visible when viewed through the line screen. It is a hidden character display tool. The present invention will be explained in detail with reference to Examples below.

As shown in FIG. 1, the grapheme group 10 that can display multiple types of characters, symbols, etc.
It consists of a set of 2...31. The grapheme group 10 in this embodiment is capable of displaying numbers 0, 1, 2 to 9, but grapheme groups with other simpler or more complex patterns may be used as necessary. However, it may also be a grapheme group capable of displaying alphabetic characters, and furthermore, it may be a grapheme group capable of displaying kanji characters etc. by forming a matrix pattern of the grapheme group. These individual graphemes 1
The outlines 1, 12 to 31 are drawn with lines 32 that are sufficiently wide or continuous with respect to the pitch of the lines on the line screen, so that the outlines 32 are drawn with the lines on the line screen. This is designed to prevent moiré from occurring between the images.

Lines 34 of a constant pitch are applied to the entire surface of the display area 33 including the character group 10 formed in this way, and form the background color (for example, the base material base color). With respect to the lines 34, the graphemes corresponding to the characters to be displayed have the same pitch as the other parts, but lines with a different phase are applied. For example, if the character to be displayed is "3", the character elements 11, 12, 13, 1
4, 15, 18, 20, 21, 22, 23, 2
6, 27, 28, 29, 30, 31 lines 35
The phase is changed by, for example, half pitch, 1/3 pitch, or 1/4 pitch compared to the parallel lines 34 in other parts. The advantage is that the smaller the phase difference, the harder it is to distinguish the hidden character.

3 lines on the surface of the pattern created in this way
By superimposing line screens with the same pitch as 4 and 35, we can see that the hidden character ``3'' is a different color from the base color due to the moire phenomenon of the lines.
becomes visible.

Note that the same effect is obtained even if a lenticular screen is used instead of a straight line screen.

The present invention has the above configuration and has excellent practical effects as shown below.

That is, in the prior art, since the lines 35 and 34, which have different phases, are made into a continuous line, an unnaturalness remains in the connecting part of the lines, which is hidden even without the use of a line screen. There was a risk that the characters could be distinguished, making it unsuitable for applications such as lottery tickets, etc. However, according to the present invention, the boundary where the phase of the lines changes is a sufficiently wide contour line. is drawn, so it is not possible to determine that the phase of the lines has changed at the border, and therefore, if used for purposes such as lottery tickets, hidden characters cannot be identified without passing through a line screen. Therefore, it has extremely excellent practical effects.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of a hidden character display device. 10...Grapheme group, 11-31...Grapheme, 3
2... line, 33... display area, 34, 35... ten thousand lines.

Claims (1)

[Scope of utility model registration request] The outline of a block-shaped grapheme group that can display multiple types of characters, symbols, etc. is drawn with a line that is sufficiently wide for the line width of the line screen, and the outline of the grapheme group that can display multiple types of characters, symbols, etc. The character groups corresponding to the characters and symbols and other characters, symbols, patterns, background colors, etc. are lined with lines of the same pitch but with different phases. A hidden character display device characterized in that the character to be displayed becomes visible by looking at the hidden character display device.