Patent ID: 8698731
Filing Date: 2014-04-15
Classification: G09G

Abstract:
1. A backlight module driving system, applied to a Liquid Crystal Display (LCD), comprising: a graphics processor, for providing a three-dimensional (3D) image signal; a timing controller, for generating a Liquid Crystal (LC) driving control signal according to the 3D image signal, and generating a corresponding light adjusting signal according to a data writing time and a Vertical Blanking Interval (VBI) time of the LC driving control signal; a backlight module; a backlight driver, for receiving the light adjusting signal, and analyzing the light adjusting signal, so as to disable the backlight module during the data writing time, and enable the backlight module during the VBI time; and a signal detector connected to the graphics processor, wherein the graphics processor further provides a two-dimensional (2D) image signal, when the signal detector judges that the 2D image signal is obtained, the signal detector provides a signal testing result and the 2D image signal to the timing controller, the timing controller adjusts the data writing time and the VBI time of the LC driving control signal according to the signal testing result to comply with an LC driving mode in which an LCD panel displays the 2D image signal, and controls the backlight driver to make the backlight emit light continuously; wherein a judging value is stored in the signal detector, when the signal detector obtains a source image signal, and judges that a time ratio of the VBI time to the sum of the data writing time and the VBI time corresponding to the source image signal is greater than the judging value, the signal detector determines the source image signal as a 3D image signal, and when the signal detector judges that the time ratio of the VBI time to the sum of the data writing time and the VBI time corresponding to the source image signal is smaller than the judging value, the signal detector determines the source image signal as a 2D image signal.