Patent ID: 8149205

Claim:
A circuit for reducing water-like waveform noise in a Liquid Crystal Display LCD panel displaying a plurality of frames, comprising: an image inverter, providing a plurality of low-voltage differential signals comprising a horizontal synchronize signal with a plurality of horizontal blankings, wherein each of the horizontal blankings corresponds to a time interval between two of the frames; a timing controller, being electrically connected with the image inverter and receiving the low-voltage differential signals, the timing controller producing a first lamp operation frequency controlling signal with a first frequency value during all of a first frame of the frames and a second lamp operation frequency controlling signal with a second frequency value during all of a second frame of the frames after the first frame by processing the horizontal synchronize signal, wherein the first frequency value is different from the second frequency value; and an inverter controlling IC, being electrically connected with the timing controller, wherein after the inverter controlling IC receives the lamp operation frequency controlling signals, the inverter controlling IC proceeds a modulation process with the first lamp operation frequency with the first frequency value controlling signal and the second lamp operation frequency with the second frequency value controlling signal and then transmits modulated signals to a post-stage outputting circuit; wherein the first lamp operation frequency controlling signal with the first frequency value and the second lamp operation frequency controlling signal with the second frequency value are uniformly varied and periodically cycled during every at least two different frames.