Patent ID: 9013393
Filing Date: 2015-04-21
Classification: G09G

Abstract:
1. A method of driving a light source of a light source module including a plurality of driving blocks, the method comprising: receiving into the light source module an image signal including a synchronization signal of the image signal and having a variable television broadcast transmission mode, the synchronization signal of the image signal including vertical and horizontal synchronization signals; analyzing the image signal to determine a target luminance corresponding to each of the driving blocks; determining a dimming level of each of the driving blocks by using the target luminance; generating a driving signal of each of the driving blocks, each driving signal having a pulse width based on the dimming level and a frequency determined using the synchronization signal of the image signal in accordance with the variable television broadcast transmission mode of the image signal, by inputting the dimming level and a triangle wave into a comparator, wherein a frequency of the triangle wave is determined by a mode signal input into a frequency determining part, the mode signal having one of a high level and a low level based on the synchronization signal, the mode signal having the high level turning on two transistors in the frequency determining part receiving the mode signal to generate the triangle wave with a first frequency and the mode signal having the low level turning off the two transistors receiving the mode signal to generate the triangle wave having a second frequency different from the first frequency; and driving each of the driving blocks by using the generated driving signal.