Patent ID: 7508355
Filing Date: 2009-03-24
Classification: G09G

Abstract:
1. A method for recognizing video signal timing of analog input applied on displays, using horizontal-synchronized-signal interrupt value to determine inputted signal timing, comprising steps as follows: (A) determining whether an inputted signal timing is altered; (B) checking whether said altered signal timing is a default signal timing; (C) deleting said horizontal-synchronized-signal interrupt value; (D) detecting whether a vertical synchronized signal is a positive trigger; if said vertical synchronized signal is not a positive trigger, continuing to detect said vertical synchronized signal until it becomes a positive trigger; (E) determining whether said horizontal-synchronized-signal interrupt value is an initial value; if true, initiating an enumerated horizontal-synchronized-signal interrupt program and repeating step (D); if not true, terminating horizontal-synchronized-signal interrupt value counts and obtaining a horizontal-synchronized-signal interrupt value; (F) whenever an interrupt program is interrupted by a horizontal synchronized signal, increasing and accumulating said horizontal-synchronized-signal interrupt value; (G) determining whether said horizontal-synchronized-signal interrupt value is greater than a default value; if true, then said inputted signal timing is a first pixel value; if not true; then said inputted signal timing is a second pixel value; and (H) terminating enumerations of horizontal-synchronized-signal interrupts.