Liquid crystal monitor drive apparatus capable of reducing electromagnetic interference
View Patent ↗A liquid crystal monitor drive apparatus that is less vulnerable to EMI emissions and minimizes the manufacturing cost thereof includes a connector for inputting an analog graphic signal from a graphic card through a transmission cable, an analog-digital converter for converting the analog graphic signal from the connector into a digital graphic data, a scaler for scaling the definition of the digital graphic data from the analog-digital converter according to a liquid crystal panel, and a timing controller for driving the liquid crystal panel based on the digital graphic data from the scaler. At least two of the analog-digital converter, the scaler, and the timing controller are arranged in a unitary integrated circuit chip.
1. A liquid crystal monitor drive apparatus for driving a liquid crystal panel, comprising:
an integrated circuit chip, the integrated circuit chip receiving an analog graphic signal, a clock signal corresponding to the analog graphic signal, and horizontal and vertical synchronous signals, the integrated circuit chip including
an analog-digital converter arranged to convert the analog graphic signal into digital graphic data;
a scaler for scaling the definition and timing of the digital graphic data by adjusting the timing of the graphic data based on the clock signal and adjusting the horizontal and vertical synchronous signals to match with a timing of the liquid crystal panel; and
a timing controller arranged to drive the liquid crystal panel based on the scaled digital graphic data, the adjusted clock signal, and the adjusted horizontal and vertical synchronous signals from the scaler; and
a peripheral circuit coupled to an inverter for driving a back light unit, the peripheral circuit operating with a frequency significantly lower than a frequency of the clock signal corresponding to the analog graphic signal.
2. The liquid crystal monitor drive apparatus as claimed in claim 1 , wherein the integrated circuit chip further includes a frame memory connected with the scaler.
3. The liquid crystal monitor drive apparatus as claimed in claim 1 , wherein the integrated circuit chip further includes a frame memory connected with the scaler.
4. The liquid crystal monitor drive apparatus as claimed in claim 1 , wherein there is no wiring between the analog-digital converter and the scaler or the scaler and the timing controller.