Ink-ribbon positioning system for color series printing machine

The color-belt locating system includes light source, sensor and discriminating device; the discriminating device discriminates dye region and the position of color frame of dye region according to the sensitized voltage produced by the sensor, and produce corrosponding location signal, said color sequence printer also includes a hot printing head and control circuit, the light ray of predetermined color emitted from light source possesses different penetration rate to different color frame of the dye region, so that the sensor produces different sensing voltage, the discriminating device based on the different sensitized voltage of different color frame to discriminate the positions of the dye regions of color belt and the different color frames of said dye region.

Method and device for dynamic detection pixel number

A method for dynamically testing pixel value and a device is to receive a pixel number array having the pixel number to be tested. The multiple reference pixel number minus the pixel number to be tested to get multiple differences. The sample pixel of the reference pixel number is that adjacent to the pixel to be tested. The two numbers are expressed in a same color. When the absolute values of the differences are greater than the reference, then, it is decided that the pixel number to be tested is wrong.

Ink-ribbon positioning system for color series printing machine