Patent ID: 8134550
Filing Date: 2012-03-13
Classification: G09G

Abstract:
1. A digital driving system for a display, comprising: a scan driver adapted to supply scan signals serially to scan lines of the display; a data driver adapted to supply a first data signal and a second data signal to data lines of the display; a timing controller adapted to control the scan driver and the data driver in accordance with a main clock, and to supply external data to the data driver; and a vertical synchronizing signal synchronizing circuit adapted to synchronize an internal vertical synchronizing signal and an external vertical synchronizing signal, wherein the vertical synchronizing signal synchronizing circuit includes: a first stage adapted to receive the external vertical synchronizing signal and to output a halved external vertical synchronizing signal, a second stage adapted to receive the internal vertical synchronizing signal and a halved internal vertical synchronizing signal from the timing controller, and to output a shifted halved internal vertical synchronizing signal, a third stage adapted to determine a phase difference between the halved external vertical synchronizing signal and the shifted halved internal vertical synchronizing signal, and a fourth stage adapted to control a frequency of the main clock in accordance with the phase difference and to feedback the controlled main clock to the timing controller.