Driving circuit applied to LCD apparatus

A driving circuit applied to a LCD apparatus, the driving circuit comprising:

• N driver chips packaged in COF packaging way, each of the N driver chips corresponding to and coupling to L output channels, wherein N and L are positive integers and N is larger than or equal to 2;
• a signal source coupled to a first output channel˜a L-th output channel of a first driver chip of the N driver chips, wherein there is a first internal resistance between the first output channel and the L-th output channel of the first driver chip;
• a first WOA wire, wherein one terminal of the first WOA wire is coupled to a first output channel˜a L-th output channel of a second driver chip of the N driver chips, and there is a second internal resistance between the first output channel and the L-th output channel of the second driver chip;
• and
• a first COF wire, wherein one terminal of the first COF wire is coupled to a first node between the signal source and the first output channel of the first driver chip and another terminal of the first COF wire is coupled to another terminal of the first WOA wire;
• wherein the first COF wire has a resistance far smaller than the first internal resistance and the first WOA wire has a resistance substantially equal to the first internal resistance;
• the first internal resistance and the second internal resistance are variable resistors integrated in the first driver chip and the second driver chip respectively to make an output voltage of the first driver chip substantially equal to an output voltage of the second driver chip;
• the variable resistors are used to compensate signal differences caused by a WOA wire coupled between two driver chips, and the variable resistors have resistances substantially equal to a resistance of the WOA wire coupled between the two driver chips and the resistances of the variable resistors can be adjusted by a gate driving circuit the variable resistors comprise a plurality of resistors having different resistances, and the plurality of resistors is coupled to a switch in series and also coupled to an output buffer of each output channel, a logic circuit and a resistance setting input pin in parallel and a matching resistance can be selected through an input logic signal.

A driving circuit applied to a LCD apparatus, the driving circuit comprising:

• N driver chips packaged in COF packaging way, each of the N driver chips corresponding to and coupling to L output channels, wherein N and L are positive integers and N is larger than or equal to 2;
• a signal source coupled to a first output channel˜a L-th output channel of a first driver chip of the N driver chips, wherein there is a first internal resistance between the first output channel and the L-th output channel of the first driver chip;
• a first WOA wire, wherein one terminal of the first WOA wire is coupled to a first output channel˜a L-th output channel of a second driver chip of the N driver chips, and there is a second internal resistance between the first output channel and the L-th output channel of the second driver chip;
• a first COF wire, wherein one terminal of the first COF wire is coupled to a first node between the signal source and the first output channel of the first driver chip and another terminal of the first COF wire is coupled to another terminal of the first WOA wire;
• a second WOA wire, wherein one terminal of the second WOA wire is coupled to a first output channel˜a L-th output channel of a third driver chip of the N driver chips, and there is a third internal resistance between the first output channel and the L-th output channel of the third driver chip;
• and
• a second COF wire, wherein one terminal of the second COF wire is coupled to a second node between the first WOA wire and the first output channel of the second driver chip and another terminal of the second COF wire is coupled to another terminal of the second WOA wire;
• wherein the first COF wire has a resistance far smaller than the first internal resistance and the first WOA wire has a resistance substantially equal to the first internal resistance;
• the second COF wire has a resistance far smaller than the second internal resistance and the second WOA wire has a resistance substantially equal to the second internal resistance;
• the third internal resistance is a total of resistances of the L output channels of the third driver chip and uniformly distributed among the L output channels of the third driver chip.