JPH01100250U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 shows examples that can be expressed using two colors and examples that can be expressed using three colors. In the case of two colors, there are 15 types, and in the case of three colors, there are 44 types. Figure 2 is a cross-sectional view of the tip of a color mark reader, in which semiconductor color sensors with different spectral characteristics are combined, upper scan type 1 and lower scan type 2 are housed in the same case, and upper and lower light sources 3 and 4 are used to detect light from a field-shaped code. A sensor reads the reflected light and outputs a signal. Figure 3 shows an example in which several photodiodes 1 and color filters 2 are used to identify colors based on discriminative logic, and these are arranged in two rows to read a letter-shaped code through the reflection of a light source 3. .

Claims (1)

[Claims for Utility Model Registration] A mark reader that uses a color identification sensor to read a mark or printed code in a combination of two or more colors: red, blue, green, black and white, and intermediate colors. A mark reader that identifies colors based on the short-circuit dark current ratio of photodiodes with different spectral characteristics. A mark reader that can read taji-shaped codes that do not require physical precision, whether they are squares or rectangles with the vertical direction 2 to 5 times the horizontal direction.