Patent ID: 8854354
Filing Date: 2014-10-07
Classification: G09G

Abstract:
1. A power supply circuit of a liquid crystal display device, comprising: a first positive polarity charge charging unit comprising a first capacitor having both ends connected to a positive power terminal and a negative power terminal through first and second switches, thereby configured to charge a charge; a second positive polarity charge charging unit comprising a second capacitor having both ends connected to the positive power terminal and a ground terminal through third and fourth switches, thereby configured to charge a charge; a first positive polarity charge loading unit configured to load the charge, which is supplied through the positive power terminal, to a negative polarity terminal of the first capacitor of the first positive polarity charge charging unit; a second positive polarity charge loading unit configured to load the charge, which is charged in the first capacitor of the first positive polarity charge charging unit, to a negative polarity terminal of the second capacitor of the second positive polarity charge charging unit; a third positive polarity charge loading unit configured to load the charge, which is charged in the second capacitor of the second positive polarity charge charging unit, to a third capacitor connected to a gate high power terminal; and a positive polarity charge charging and loading control unit configured to: periodically or irregularly change durations of the charging control signals and durations of the loading control signals such that each of the charging control signals and the loading control signals has a frequency that changes in a regular pattern with respect to a center frequency or hops irregularly about the center frequency.