DISPLAY APPARATUS HAVING FUNCTIONS OF DISPLAYING VIDEO SIGNALS AS ENLARGED/THINNED PICTURES

摘要

PURPOSE: A display device is provided to have a function to display an enlarged picture and a function to display a shrunk (thinned) picture and to apply to a picture display apparatus such as a liquid-crystal display apparatus provided with supplementary capacitors each having the Cs on-gate structure without problems. CONSTITUTION: A display apparatus comprises a driving circuit having: a field discriminating circuit; a copy/thinning discriminating circuit(3); a pulse generating circuit(4) for generating copy clock pulse signals in a horizontal period in addition to original clock pulse signals in an operation to display an enlarged picture; a gate-clock generating circuit(5) for generating gate-clock signals obtained as a result of superposing all of the original clock pulse signals on some of the copy clock pulse signals the number of which is equal to a difference obtained as a result of subtraction of a vertical-pixel count of a video signal from a vertical-pixel count of a display unit; and a gate driver(6) for generating a plurality of gate driving signals at a high level for pulses of the gate clock signals with timings different from each other.