Over current protection circuit and liquid crystal display

An over current protection circuit, applied in a substrate array row driving gate driver on array (GOA) circuit having a dual driving function, wherein the GOA circuit having the dual driving function comprises N left GOA units, N right GOA units, a left level shifting circuit and a right level shifting circuit, wherein the over current protection circuit comprises a left over current protection circuit and a right over current protection circuit, the left over current protection circuit comprises N left over current protection sub circuits and the right over current protection circuit comprises N right over current protection sub circuits, both the left over current protection sub circuits and the right over current protection sub circuits are fuses, the left level shifting circuit comprises N left level shifting sub circuits and the right level shifting circuit comprises N right level shifting sub circuits, each of the left GOA units is driven by a corresponding left level shifting sub circuit and each of the right GOA units is driven by a corresponding right level shifting sub circuit, N is an positive integer;

• a first left GOA unit and a first left level shifting sub circuit are coupled through a first left clock line, a first left over current protection sub circuit is coupled to the first left clock line in series;
• a first right GOA unit and a first right level shifting sub circuit are coupled through a first right clock line, a first right over current protection sub circuit is coupled to the first right clock line in series;
• the first left GOA unit is any one of the N left GOA units and the first right GOA unit is any one of the N right GOA units;
• when the first left level shifting circuit works, the first left level shifting circuit generates a first left clock control signal to be outputted to the first left GOA unit through the first left clock line;
• when the first right level shifting circuit works, the first right level shifting circuit generates a first right clock control signal to be outputted to the first right GOA unit through the first right clock line;
• the first left clock control signal has the same timing as the first right clock control signal;
• the first left over current protection sub circuit is fused when the first left clock control signal on the first left clock line is larger than a predetermined current threshold value to stop the first left level shifting sub circuit outputting the first left clock control signal to the first left GOA unit;
• the first right over current protection sub circuit is fused when the first right clock control signal on the first right clock line is larger than the predetermined current threshold value to stop the first right level shifting sub circuit outputting the first right clock control signal to the first right GOA unit.

A liquid crystal display, comprising a substrate array row driving gate driver on array (GOA) circuit having a dual driving function and an over current protection circuit, wherein the GOA circuit having the dual driving function comprises N left GOA units, N right GOA units, a left level shifting circuit and a right level shifting circuit, wherein the over current protection circuit comprises a left over current protection circuit and a right over current protection circuit, the left over current protection circuit comprises N left over current protection sub circuits and the right over current protection circuit comprises N right over current protection sub circuits, both the left over current protection sub circuits and the right over current protection sub circuits are fuses, the left level shifting circuit comprises N left level shifting sub circuits and the right level shifting circuit comprises N right level shifting sub circuits, each of the left GOA units is driven by a corresponding left level shifting sub circuit and each of the right GOA units is driven by a corresponding right level shifting sub circuit, N is an positive integer;

• a first left GOA unit and a first left level shifting sub circuit are coupled through a first left clock line, a first left over current protection sub circuit is coupled to the first left clock line in series;
• a first right GOA unit and a first right level shifting sub circuit are coupled through a first right clock line, a first right over current protection sub circuit is coupled to the first right clock line in series;
• the first left GOA unit is any one of the N left GOA units and the first right GOA unit is any one of the N right GOA units;
• when the first left level shifting circuit works, the first left level shifting circuit generates a first left clock control signal to be outputted to the first left GOA unit through the first left clock line;
• when the first right level shifting circuit works, the first right level shifting circuit generates a first right clock control signal to be outputted to the first right GOA unit through the first right clock line;
• the first left clock control signal has the same timing as the first right clock control signal;
• the first left over current protection sub circuit is fused when the first left clock control signal on the first left clock line is larger than a predetermined current threshold value to stop the first left level shifting sub circuit outputting the first left clock control signal to the first left GOA unit;
• the first right over current protection sub circuit is fused when the first right clock control signal on the first right clock line is larger than the predetermined current threshold value to stop the first right level shifting sub circuit outputting the first right clock control signal to the first right GOA unit.