KR970060962A - Conversion automatic adjustment device of deflection yoke - Google Patents

Abstract

The present invention relates to a deflection yoke of a deflection yoke which automatically performs a convexity inspection process of a deflection yoke in a deflection yoke inspection process of a color cathode ray tube used in a video display such as a television receiver or a computer monitor, And an adjustment device.

Conventionally, since the convexity inspection operation of the deflection yoke is a visual inspection method, it is impossible to exclude an error caused by an individual visual difference, and furthermore, there is a problem of repetitive detachment and detachment of components for correcting the convergence characteristic of the deflection yoke And there is a problem that an adjustment error occurs due to a difference in mounting position of the CPM.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems occurring in the prior art, Means for controlling power supplied to the magnetic field generating means; Means for obtaining a position of an electron beam adjusted by the CPM under the control by a video signal and means for comparing the obtained video information with reference video information for judgment and outputting a determination result, It provides a deflection yoke congussions automatic adjustment device to automate version checking tasks.

Description

Conversion automatic adjustment device of deflection yoke

Since this is a trivial issue, I did not include the contents of the text.

FIG. 4 is a circuit diagram of a deflection yoke cone version automatic adjustment apparatus of the present invention. FIG.

Claims (4)

Correction magnetic field generating means for generating a magnetic field for moving the RGB electron beam for the convergence inspection of the deflection yoke and controlling the intensity of the generated magnetic field; Image detecting means for detecting the bright spot image information on the screen of the electron beam deflected by the magnetic field generated by the correction magnetic field generating means; Setting means for setting reference image information for determining an amount and a failure; The image information detected by the detecting means is compared with the reference image information of the setting means and the correction magnetic field generating means is controlled in accordance with the comparison result to change the intensity of the magnetic field, Control means; An output means for outputting a result of the presence inspection determined by the control means; And an automatic adjustment device for adjusting the convergence of the deflection yoke. The apparatus according to claim 1, wherein the correction magnetic field generating means comprises: A magnetic field generation circuit comprising a core for generating a magnetic field in the cylinder and a core in which the core is wound is provided at a position for deflecting the RGB electron beam, And the control means changes the power supplied to the coil to control the generation of the magnetic field. The image processing apparatus according to claim 1, wherein the image detecting means comprises: A camera for photographing a bright spot appearing on a front screen of a cathode ray tube and an image processor for converting a video signal photographed by the camera into a digital signal and supplying the position information to the control means. Automatic adjustment device. The apparatus of claim 1, further comprising means for inputting and setting the reference information to the setting means. ※ Note: It is disclosed by the contents of the first application.