Driving circuit of LCD panel, LCD panel, and LCD device

1. A driving circuit of a liquid crystal display (LCD) panel, comprising:

a compensation unit coupled with a scan line of the LCD panel and outputting N different driving voltages to different gate driver chips on a side of the LCD panel, wherein N is equal to a number of the gate driver chips arranged on the side of the LCD panel,

wherein the compensation unit comprises a switching module coupled with a sampling voltage, an output end of the switching module is correspondingly connected with N groups of voltage dividing circuits, and output ends of the N groups of voltage dividing circuits are connected to an inner cabling of the LCD panel and coupled to the gate driver chips through the inner cabling; wherein the switching module switches N times within a time period of one frame, and the sampling voltage is switched to different voltage dividing circuits to form different driving voltages,

wherein a control end of the switching module is coupled to a time sequence control circuit of the driving circuit of the LCD panel, the time sequence control circuit identifies the gate driver chips executing scan work and outputs a control signal controlling the switching module to switch to a corresponding voltage dividing circuit,

wherein there are two gate driver chips; the switching module comprises a first controllable switch turned on by a high level signal and a second controllable switch turned on by a low level signal, input ends of the first controllable switch and the second controllable switch are coupled to the sampling voltage, output ends of the first controllable switch and the second controllable switch are correspondingly coupled to different voltage dividing circuits, control ends of the first controllable switch and the second controllable switch are coupled to the time sequence control circuit; the control signal of the time sequence control circuit outputs a low-level signal and a high-level signal within the time period of one frame.

2. The driving circuit of the liquid crystal display (LCD) panel of claim 1 , wherein the switching module further comprises a comparator; the control ends of the first controllable switch and the second controllable switch are coupled to the control signal of the time sequence control circuit by the comparator; a reference end of the comparator is coupled with a first reference voltage a comparison end of the comparator is coupled to the control signal of the time sequence control circuit.

3. The driving circuit of the liquid crystal display (LCD) panel of claim 1 , wherein two groups of voltage dividing circuits comprise a first voltage dividing circuit and a second voltage dividing circuit; one end of each of the first voltage dividing circuit and the second voltage dividing circuit is connected with a second reference voltage, and the other end is connected to the inner cabling of the LCD panel; the first voltage dividing circuit comprises a first resistor and a second resistor that are connected in series, the output end of the first controllable switch of the switching module is coupled between the first resistor and the second resistor; the second voltage dividing circuit comprises a third resistor and a fourth resistor that are connected in series; the output end of the second controllable switch of the switching module is coupled between the third resistor and the fourth resistor.

4. The driving circuit of the liquid crystal display (LCD) panel of claim 2 , wherein two groups of voltage dividing circuits comprise a first voltage dividing circuit and a second voltage dividing circuit; one end of each of the first voltage dividing circuit and the second voltage dividing circuit is connected with a second reference voltage, and the other end is connected to the inner cabling of the LCD panel; the first voltage dividing circuit comprises a first resistor and a second resistor that are connected in series, the output end of the first controllable switch of the switching module is coupled between the first resistor and the second resistor; the second voltage dividing circuit comprises a third resistor and a fourth resistor that are connected in series; the output end of the second controllable switch of the switching module is coupled between the third resistor and the fourth resistor.

5. A liquid crystal display (LCD) device, comprising:

a driving circuit of an LCD panel, wherein the driving circuit of the LCD panel comprises a compensation unit coupled with a scan line of the LCD panel and outputting N different driving voltages to different gate driver chips on a side of the LCD panel, N is equal to a number of the gate driver chips arranged on the side of the LCD panel,

wherein the compensation unit comprises a switching module coupled with a sampling voltage, an output end of the switching module is correspondingly connected with N groups of voltage dividing circuits, and output ends of the N groups of voltage dividing circuits are connected to an inner cabling of the LCD panel and coupled to the gate driver chips through the inner cabling; wherein the switching module switches N times within a time period of one frame, and the sampling voltage is switched to different voltage dividing circuits to form different driving voltages,

wherein a control end of the switching module is coupled to the time sequence control circuit of the driving circuit of the LCD panel, the time sequence control circuit identifies the gate driver chips executing scan work and outputs a control signal is outputted for controlling the switching module to switch to a corresponding voltage dividing circuit,

wherein there are two gate driver chips; the switching module comprises a first controllable switch turned on by a high level signal and a second controllable switch turned on by a low level signal, input ends of the first controllable switch and the second controllable switch are coupled to the sampling voltage, output ends of the first controllable switch and the second controllable switch are correspondingly coupled to different voltage dividing circuits control ends of the first controllable switch and the second controllable switch are coupled to the time sequence control circuit; the control signal of the time sequence control circuit outputs a low-level signal and a high-level signal within the time period of one frame.

6. The liquid crystal display (LCD) device of claim 5 , wherein the switching module further comprises a comparator; the control ends of the first controllable switch and the second controllable switch are coupled to the control signal of the time sequence control circuit by the comparator; a reference end of the comparator is coupled with a first reference voltage; a comparison end of the comparator is coupled to the control signal of the time sequence control circuit.

7. The liquid crystal display (LCD) device of claim 5 , wherein two groups of voltage dividing circuits comprise a first voltage dividing circuit and a second voltage dividing circuit; one end of each of the first voltage dividing circuit and the second voltage dividing circuit is connected with a second reference voltage, and the other end is connected to the inner cabling of the LCD panel; the first voltage dividing circuit comprises a first resistor and a second resistor that are connected in series, the output end of the first controllable switch of the switching module is coupled between the first resistor and the second resistor; the second voltage dividing circuit comprises a third resistor and a fourth resistor that are connected in series; the output end of the second controllable switch of the switching module is coupled between the third resistor and the fourth resistor.

8. The liquid crystal display (LCD) device of claim 6 , wherein two groups of voltage dividing circuits comprise a first voltage dividing circuit and a second voltage dividing circuit; one end of each of the first voltage dividing circuit and the second voltage dividing circuit is connected with a second reference voltage, and the other end is connected to the inner cabling of the LCD panel; the first voltage dividing circuit comprises a first resistor and a second resistor that are connected in series, the output end of the first controllable switch of the switching module is coupled between the first resistor and the second resistor; the second voltage dividing circuit comprises a third resistor and a fourth resistor that are connected in series; the output end of the second controllable switch of the switching module is coupled between the third resistor and the fourth resistor.

9. A driving circuit of a liquid crystal display (LCD) panel, comprising:

a compensation unit coupled with a scan line of the LCD panel and outputting N different driving voltages to different gate driver chips on a side of the LCD panel, wherein N is equal to a number of the gate driver chips arranged on the side of the LCD panel,

wherein the compensation unit comprises a switching module coupled with a sampling voltage, an output end of the switching module is correspondingly connected with N groups of voltage dividing circuits, and output ends of the N groups of voltage dividing circuits are connected to an inner cabling of the LCD panel and coupled to the gate driver chips through the inner cabling, wherein the switching module switches N times within a time period of one frame, and the sampling voltage is switched to different voltage dividing circuits to form different driving voltages,

wherein a control end of the switching module is coupled to a time sequence control circuit of the driving circuit of the LCD panel, the switching module comprises a first controllable switch turned on by a high level signal and a second controllable switch turned on by a low level signal, an input end of the switching module is coupled to the sampling voltage, an output end of the switching module is correspondingly coupled to different voltage dividing circuits; the driving circuit of the LCD panel further comprises a comparator, a reference end of the comparator is coupled with a reference voltage, a comparison end of the comparator is coupled to an output end of the time sequence control circuit, an output end of the comparator is coupled to control ends of the first controllable switch and the second controllable switch; the time sequence control circuit outputs a low-level signal and a high-level signal within the time period of one frame and controls the first controllable switch and the second controllable switch to alternately switch by the comparator; two groups of voltage dividing circuits comprise a first voltage dividing circuit and a second voltage dividing circuit, one end of each of the first voltage dividing circuit and the second voltage dividing circuit is connected with the reference voltage, and the other end is connected to the inner cabling of the LCD panel; the first voltage dividing circuit comprises a first resistor and a second resistor that are connected in series, the output end of the first controllable switch of the switching module is coupled between the first resistor and the second resistor, the second voltage dividing circuit comprises a third resistor and a fourth resistor that are connected in series, the output end of the second controllable switch of the switching module is coupled between the third resistor and the fourth resistor; the reference voltage is 1.25 V.