Patent ID: 9147370
Filing Date: 2015-09-29
Classification: G09G

Abstract:
1. An image display apparatus comprising: a plurality of gate lines; a plurality of data lines intersecting with said plurality of gate lines; a plurality of pixels formed in the vicinities of intersections of said plurality of gate lines and said plurality of data lines; a source driver that has a latch circuit for holding display data for one pixel line and that supplies a signal corresponding to said display data to said plurality of pixels through said data lines; a gate line driving circuit that drives said plurality of pixels by sequentially activating said plurality of gate lines; and an inactivation transition detecting circuit that activates a detect signal for a certain period when detecting inactivation of each of said plurality of gate lines, wherein said latch circuit updates held display data in response to the activation of said detect signal, said inactivation transition detecting circuit includes detecting circuits that are provided respectively for said plurality of gate lines to activate the detect signal when corresponding gate lines are inactivated, each said detecting circuit transmits a first signal to a gate of a first transistor to charge an output terminal of said detect signal and transmits a second signal to a gate of a second transistor to charge the output terminal a certain time after charging of the output terminal, each said detecting circuit inactivates said first transistor and said second transistor while said corresponding gate line is active, when said corresponding gate line is inactivated, each said detecting circuit first activates said first transistor, and after said certain time has passed, activates said second transistor and inactivates said first transistor approximately simultaneously, and inactivates said second transistor after a further certain time has passed, and transistors forming said inactivation transition detecting circuit are all of a same conductivity type.