Color purity measuring device and measuring method

摘要

The present invention relates to a color purity measuring apparatus and a measuring method for measuring convergence and color purity as one optical system through an image processing of a raster output from an electron tube through a camera unit, and a signal generating unit for outputting an image signal. An electron tube that receives an output signal of the signal generator and outputs a raster, a camera unit that receives an image of the raster output from the electron tube, an image processor which processes a signal of an image input through the camera unit, and And a microcomputer that determines the color purity by inputting the signal processed by the image processor and outputs a control signal to the signal generator, wherein the first process receives an image of a raster output from an electron tube, and in the first process. A second process of processing an input image to obtain a mis-landing value, and color purity according to the result of the second process By measuring the color purity in a third step of determining the configuration becomes simple it is characterized in that which can reduce the manufacturing cost and improve the reliability of the results.