JPS6038753B2 - color bar code reader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color code reading device.

The conventional barcode reading method used in POS (Point of Sales) terminals etc. has two types: white and black.
A method of coding by color and assigning white and black to "0" and "1", "wide" and "narrow" widths of white and black bars
There are two methods: a method of associating "0" and "1" with "0" and "1", and a method of associating the changing order of the three colors with "OJ" and "1" using a three-color color bar code.

Barcodes are read by manually scanning the tag.
Since the reflected light is converted into a signal, the speed at which the tag is manually scanned is unstable, and the speed changes greatly during scanning.

Therefore, when reading a black and white barcode, it is difficult to obtain synchronous data latches. On the other hand, in the method of associating the color change order of the three colors with "0" or "IJ", there is no effect of the barcode scanning speed, but
The mechanism for recognizing the change order becomes complicated.

The present invention simultaneously improves the above two drawbacks of the conventional system.

The present invention aims to prevent changes in the scanning speed of a bar code tag from affecting the reading when manually reading a bar code, and to simplify the bar code recognition mechanism.

Hereinafter, the present invention will be explained in detail with reference to Examples. 1st
1 and 2 show an embodiment of a color code reading device according to the present invention.

For color tag 1, the color "A" corresponds to "1" in the binary code encoded product code, etc., and "0"
”, the color “B” is assigned, and when “0” or “1” are consecutive, the color “C” is inserted at the even numbered position to reduce the number of consecutive same colors. There is. For example, a color bar code is printed according to the rule that "AABCCBC" is assigned to "1110000" and the color "C" corresponds to the same code as the color immediately before it. By scanning the tag reader 2 over the color tag, reflected light from the color bar is output to the color sensor 4 through the glass fiber 3. The color sensor 4 has a function of turning on the signals at the corresponding output terminals 5, 6, and 7 only when the light from the glass fiber 3 is A, B, or C. The data signal generator 8 turns on the output terminal 10 when the input terminal 5 turns on (when color "A" is read), and when the input terminal 6 turns on (
(When color "B" is read) Turn off the signal of the main power terminal 10. The data latch pulse generator 9 outputs a pulse to the output terminal 11 after a certain delay time when the signal of any one of the input terminals 5, 6, or 7 rises, and outputs a pulse to the signal line 10.
The data processing device 12 calculates the data and latch timing from
Let me know. The data processing device 12 latches and accumulates the signal at the input terminal 10 when a pulse is generated from the input terminal 11, performs a series of processing such as parity check, and outputs the accumulated data to the outside as necessary.

It is also desirable to have a speaker or display connected to the data processing device 12 to provide a means for informing the user of the success or failure of bar code reading. As described above, according to the present invention, for a binary code consisting of "0" and "1", a specific color is assigned to "0" and "1" respectively, and "0" or "1" is If they are continuous, use different colors in succession.

Read the color bar code inserted at the even numbered position of the column of "0" or "1" so that the same color does not appear consecutively,
It has a function that outputs a signal corresponding to "0" or "1" at the time of inputting a color corresponding to "0" or "1", respectively, and uses the time of color change as the latch timing of the output signal. Barcode reading is not affected by the speed at which the color tag is scanned, eliminating reading errors caused by speed changes.Furthermore, the spot color is the signal "1".
and "0", the signal recognition mechanism can be simplified. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an illustration of a color bar code according to the present invention;
FIG. 2 is a block diagram showing one embodiment of the present invention.

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Claims (1)

[Claims] 1 Assign the first color to “0” in the binary code, 2
Assign the second color to the base code “1” and display the “1”
or in the case of consecutive "0"s, a color bar code in which a third color is assigned to the even numbered position of the consecutive columns;
A reading means for extracting signals corresponding to the first to third colors by scanning the color bar code, and a signal for identifying the light signal from the reading means and identifying the color of the input light. A detection means for outputting, a data signal generation means for recognizing a change in the output data for each color from the detection means and setting the output to a "0" level when the first color is detected, and a change in the output signal of the detection means. data latch pulse generation means for generating a data latch synchronization pulse after a predetermined delay time; and data for capturing the output of the data signal generation means in synchronization with the pulse from the data latch pulse generation means. A color bar code reading device comprising processing means.