Patent ID: 6456332
Filing Date: 2002-09-24
Classification: G09G,H04N

Abstract:
A device for generating composite horizontal and vertical sync signals of a composite signal, comprising:a microcomputer to generate a sync select signal based on a display mode; a composite signal analyzing and horizontal/vertical oscillating circuit to generate horizontal and vertical oscillating signals based on a luminance signal separated from the composite signal ; a horizontal sync signal generator to process the horizontal oscillating signal generated from said composite signal analyzing and horizontal/vertical oscillating circuit, to generate a composite horizontal sync signal; a vertical sync signal generator to process the vertical oscillating signal generated from said composite signal analyzing and horizontal/vertical oscillating circuit, to generate a composite vertical sync signal, and a sync signal switching circuit to selectively output one pair among the composite horizontal and vertical sync signals respectively generated from said horizontal and vertical sync signal generators and horizontal and vertical sync signals transmitted from a host computer in response to the select signal generated by said microcomputer.