TWI760714B - Driving circuit and driving method of display panel - Google Patents

Abstract

A driving circuit and a driving method are used to drive a display panel. The display panel comprises a plurality of scanning lines, a plurality of data lines, and a plurality of pixels. The driving circuit comprises a scanning driving circuit, a data driving circuit, and a control circuit. The scanning driving circuit is coupled to the plurality of scanning lines. The data driving circuit is coupled to the plurality of data lines and has at least one current source for driving the plurality of pixels, and the at least one current source provides at least one current. The control circuit is coupled to the scanning driving circuit and the data driving circuit, and adjusts the at least one current provided by the at least one current source according to a load state of a part of the pixels of the plurality of pixels driven by the data driving circuit.

Description

Display panel driving circuit and driving method

The present invention relates to a driving circuit and a driving method, in particular to a driving circuit and a driving method for a display panel to achieve uniform display brightness.

In the passive organic light emitting diode display, when the number of display units (pixels) on one column of scan lines is driven to light up relatively more than the number of display units on the scan lines of other columns to be driven to light up, each column of the column will be driven to light up. The power obtained by the display unit is relatively lower than the power obtained by the bright display units on other columns, that is, the greater the load, the lower the brightness, which in turn leads to the phenomenon of uneven brightness of the display screen. Therefore, the People's Republic of China Patent Publication No. CN104575375B discloses a passive matrix organic light emitting diode display with a function of balancing display brightness and a driving method, which calculates the total number of display units to be driven on each scan line, and then calculates the The positive correlation method adjusts the time length of the scan driving cycle, so that the display time is increased and the brightness compensation effect is visually produced. In addition, the previous case also achieved the effect of matching the display brightness by adjusting the voltage level. In short, the former solution achieves the effect of brightness balance by means of time compensation (adjusting the driving period) or voltage compensation (adjusting the driving voltage difference). However, the above driving methods still have shortcomings.

Therefore, the main purpose of the present invention is to provide a driving circuit and a driving circuit for a display panel. The dynamic method is different from the prior art, and can also solve the problem of inconsistent brightness and solve the deficiencies of the prior art.

The invention discloses a driving circuit for driving a display panel. The display panel includes a plurality of scanning lines, a plurality of data lines and a plurality of pixels. The driving circuit includes: a scanning driving circuit, a data driving circuit and a control circuit. The scan driving circuit is coupled to the plurality of scan lines. The data driving circuit is coupled to the plurality of data lines and has at least one current source for driving the plurality of pixels, and the at least one current source provides at least one current. The control circuit is coupled to the scan driving circuit and the data driving circuit, and adjusts the at least one current provided by the at least one current source according to the load state of the data driving circuit driving some pixels of the plurality of pixels.

The present invention discloses a driving method for a display panel comprising a plurality of scan lines, a plurality of data lines and a plurality of pixels. The driving method includes the following steps: providing at least one current to drive the plurality of pixels; and adjusting the at least one current according to the load state of some pixels driving the plurality of pixels.

Therefore, by adjusting the current output by the current source according to the load state of the pixel to be driven, the brightness of the driven pixel can be adjusted through the compensation of the current, thereby achieving the effect of uniform display brightness.

1: Display panel

11: Scan line

12: Data line

13: Pixels

2, 3: drive circuit

20, 30: Power generator

21: Scanning drive circuit

22, 32: Data drive circuit

221: Current source

223: switch

23: Storage unit

24: Control circuit

241, 341: Compensation circuit

243: Control Unit

GND: enable level

IA: first current value

IB: second current value

T: time

VCOMH: Disable voltage

VDIS: Discharge level

VPRE: Precharge Voltage

S1~S6: Steps

CS: Compensation signal

4: Drive method

FIG. 1 is a circuit block diagram of a driving circuit according to an embodiment of the present invention.

FIG. 2 is a luminance load curve diagram according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of luminance load correction according to an embodiment of the present invention.

FIG. 4 is a circuit block diagram of another driving circuit according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of waveforms of precharging, current driving, and discharging performed on pixels by a data driving circuit according to an embodiment of the present invention.

FIG. 6 is a flowchart of a driving method according to an embodiment of the present invention.

Certain terms are used in the description and claims to refer to specific elements. However, those with ordinary knowledge in the technical field of the present invention should understand that manufacturers may use different terms to refer to the same element. The claim does not take the difference in name as a way of distinguishing elements, but takes the difference in the overall technology of the elements as a criterion for distinguishing. The "comprising" mentioned throughout the specification and claims is an open-ended term, so it should be interpreted as "including but not limited to". Furthermore, the term "coupled" herein includes any direct and indirect means of connection. Therefore, if a first device is described as being coupled to a second device, it means that the first device can be directly connected to the second device, or can be indirectly connected to the second device through other devices or other connecting means.

Please refer to FIG. 1. FIG. 1 is a circuit block diagram of a driving circuit 2 according to an embodiment of the present invention. The driving circuit 2 is used for driving a display panel 1 . The display panel 1 includes a plurality of scan lines 11 , a plurality of data lines 12 and a plurality of pixels 13 . The plurality of scan lines 11 are horizontally arranged and spaced apart, and the plurality of data lines 12 are vertically arranged and interlaced with and spaced from the plurality of scan lines 11 . Each pixel 13 is disposed at the intersection of the corresponding scan line 11 and the data line 12 and is coupled to the scan line 11 and the data line 12, and each pixel 13 includes an organic light-emitting diode (Organic Light-Emitting Diode, OLED). ), and has parasitic capacitance such as coupling capacitance. In an embodiment of the present invention, the anode of the organic light emitting diode is coupled to the data line 12 , the cathode is coupled to the scan line 11 , and the coupling capacitor is located between each scan line 11 and each data line 12 . Of course, in other implementations In an example, the pixels 13 can also be other types of display units, which are not limited thereto.

The driving circuit 2 includes a power generator 20 , a scanning driving circuit 21 , a data driving circuit 22 , a storage unit 23 and a control circuit 24 . The power generator 20 is coupled to the scan driving circuit 21 and the data driving circuit 22 to provide the power required by the scan driving circuit 21 and the data driving circuit 22 , such as voltage or current. The scan driving circuit 21 is coupled to the plurality of scan lines 11 and is used for providing a scan signal to the plurality of scan lines 11 to scan the plurality of scan lines 11 . In this embodiment, the scan signal is a disable voltage VCOMH or an enable level GND, the disable voltage VCOMH is a high voltage relative to the enable level GND, and the enable level GND can be a ground level. When the scan signal is at the enable level GND, the scan line 11 is scanned, and if the scan signal is at the disable voltage VCOMH, the scan line 11 is not scanned. The data driving circuit 22 is coupled to the plurality of data lines 12 and has a plurality of current sources 221 . In one embodiment of the present invention, each current source 221 can be a current mirror capable of mirroring the current output by the power generator 20 to the data driving circuit 22 . The plurality of switches 223 are respectively located between the plurality of current sources 221 and the plurality of data lines 12 , and the plurality of current sources 221 provide current to the plurality of pixels 13 through the plurality of switches 223 to drive the plurality of pixels 13 to make the plurality of pixels 13 can shine. Therefore, the data driving circuit 22 controls the plurality of switches 223 according to a display data to provide current to the pixel 13 to be driven. In an embodiment of the present invention, the display data can be stored in the storage unit 23, and the data driving circuit 22 is coupled to the storage unit 23 to receive the display data, or directly transmit the display data from a host (Host) of the electronic device to the storage unit 23. Data driving circuit 22 .

In addition, when the scan driving circuit 21 scans each column of scan lines 11, the data driving circuit 22 can also provide a precharge voltage VPRE or a discharge level VDIS to the plurality of data lines 12, that is, can provide the precharge voltage VPRE or discharge Level VDIS to some of the pixels 13 . Before driving some of the pixels 13, the data driving circuit 22 may first enter a precharge phase to precharge the pixels 13 to be driven, and then enter a constant current phase, that is, supply current to The pixel 13 to be driven then enters a discharge phase, that is, the discharge level VDIS is provided to the driven pixel 13 to discharge the driven pixel 13 . In one embodiment of the present invention, the discharge level VDIS may be the level of the ground terminal. As above, the plurality of switches 223 are also located between the precharge voltage VPRE and the plurality of data lines 12, and between the discharge level VDIS and the plurality of data lines 12, so the data driving circuit 22 controls the switches 223 according to the display data , to provide the precharge voltage VPRE or the discharge level VDIS to some of the pixels 13 . It should be noted that each current source 221 corresponds to a data line 12 , so each current source 221 can drive the pixels 13 on the corresponding data line 12 . In an embodiment of the present invention, a current source 221 does not only correspond to one data line 12, but a current source 221 can correspond to a plurality of data lines 12, which can reduce the number of current sources 221, but the current source 221 and each Switches 223 are still provided between the data lines 12 .

The storage unit 23 can store display data and a compensation reference data. The display data includes the information of the pixels 13 to be driven by the data driving circuit 22 and the pixels 13 not to be driven corresponding to each scan line 11 , so the data can be obtained according to the display data. The driving circuit 22 corresponds to the number of pixels 13 to be driven by each scan line 11 , that is, the load status of the data driving circuit 22 to drive some pixels 13 can be known. The more pixels 13 to be driven, the heavier the load, the less pixels to be driven. 13 indicates that the load is small, and the compensation reference data is a load-to-compensation reference data, which can be a correspondence table of a load corresponding to the compensation amount or can be at least one reference signal of an analog circuit, and this reference signal is equivalent to the load and compensation The corresponding relationship between the quantities, the analog circuit can generate the compensation signal according to the compensation reference data.

In an embodiment of the present invention, the load-to-compensation reference data is designed based on a luminance load curve shown in FIG. 2 as a reference. The brightness load curve is obtained through experiments or simulation of the display panel of the display. Different panels have different characteristics due to the manufacturing process, design, etc., so the brightness load curve of different panels is not the same. It can be seen from the brightness load curve that under the same current, the greater the load, the lower the brightness of the driven pixel, and the smaller the load, the higher the brightness of the driven pixel. According to the brightness load curve and the set benchmark, such as the dotted line in Figure 2, when the load is small, the current must be reduced to reduce the brightness, and when the load is large, the current must be increased to increase the brightness, so as to drive the scanning in different rows. When the load states of the pixels of the line and the driving pixels are different, for example, the number of driving pixels is different, the brightness difference of the picture displayed by the pixels of different columns of the display panel 1 can be avoided too large, so the brightness of the picture displayed by the display panel 1 can be more consistent.

The control circuit 24 is coupled to the power generator 20 , the scan driving circuit 21 , the data driving circuit 22 , and the storage unit 23 , and has a compensation circuit 241 and a control unit 243 . The compensation circuit 241 is coupled to the storage unit 23 to receive the display data and the compensation reference data, so as to generate a compensation signal CS according to the display data and the compensation reference data, and then transmit the compensation signal CS to the power generator 20 to control the power generator 20 outputs the current to the data driving circuit 22 to adjust the current provided by the plurality of current sources 221 . Therefore, the control circuit 24 can adjust the current provided by the plurality of current sources 221 according to the load state of the data driving circuit 22 for driving some of the pixels of the plurality of pixels 13 . The control unit 243 is coupled to the scan driving circuit 21 and the data driving circuit 22 to provide a timing signal to the scan driving circuit 21 and the data driving circuit 22, and the scan driving circuit 21 and the data driving circuit 22 operate according to the timing signal respectively.

Specifically, taking Fig. 3 as an example, if the brightness under lighting (driving) a single pixel is used as the benchmark, the greater the load (that is, the more pixels to be lit), the greater the compensation amount required; Conversely, when the load is smaller, the amount of compensation required is smaller. Among them, it should be noted that the "compensation amount" is the "current amount to be corrected". For example, it is assumed that there are 16 pixels on each scan line 11, and when a picture is displayed, 4 pixels on the scan line 11 in the first column need to be lit, and the scan line 11 in the second column needs to be lit For the 12 pixels above, if the brightness under lighting one pixel is used as the benchmark, since the load value of lighting 12 pixels is greater than the load value of lighting 4 pixels, the current that needs to be compensated for lighting 12 pixels The value is greater than the compensation current value required to light up 4 pixels. In other words, the increased current value required to light up 12 pixels is greater than that required to light up 4 pixels increased current value.

More specifically, assuming that there are 16 pixels on each column of scan lines 11, if the brightness of 1 pixel is used as the benchmark, the 16 pixels can be divided into four-level loads, and 1 to 4 pixels are lit as the first. Stage load, lighting 5~8 pixels is the second stage load, lighting 9~12 pixels is the third stage load, and lighting 13~16 pixels is the fourth stage load. Therefore, the first stage load The compensation amount is the least; the fourth-order load has the most compensation amount, and the "compensation amount" here means increasing the current. In addition, in some embodiments, a binary digit representation method can also be used to determine the load state, and then the load state can be divided into multiple levels. For example, it is assumed that there are 15 pixels on each column of scan lines 11, and based on the brightness of 1 pixel, it can be represented by 4 bits and divided into four levels of loads, such as the fourth level respectively. The load (such as 1000~1111) corresponds to lighting 8~15 pixels, the third stage load (such as 0100~0111) corresponds to lighting 4~7 pixels, and the second stage load (such as 0010~0011) corresponds to lighting 2~ 3 pixels, and the first-order load (such as 0001) corresponds to 1 pixel. The compensation circuit 241 can first determine whether the highest bit (ie, the fourth bit) is 1; if so, the compensation amount is the largest within the range of the fourth-order load (1000~1111); Whether the 3rd bit is 1. When the third bit is 1, in the range of the third order (0100~0111), the compensation amount is less than the highest compensation amount; when the third bit is 0, the second bit is judged further down is 1, and so on. Among them, the compensation amount of the first-order load (0001) is the smallest, or even no compensation. This digital method can determine the corresponding compensation amount only by judging which highest bit the first 1 appears in, which is convenient for judgment and compensation.

In some embodiments, the storage unit 23 further stores a weight data, the compensation circuit 241 can obtain a weighted load value according to the weight data and the display data, and generate the compensation signal CS according to the load value and the load pair compensation amount reference data, The current output by the power generator 20 is regulated by the compensation signal CS to adjust the current provided by the plurality of current sources 221 . Specifically, taking the pixels 13 on two scan lines 11 as an example, if the load state of all the pixels 13 on one scan line 11 is greater than that on the other scan line 11 The load state of all the pixels 13 (for example, the size of the pixel 13 is relatively large or the impedance of the pixel 13 is relatively large), then when the same current is supplied and all the pixels 13 are driven, the pixel 13 with the larger load will be relatively dark. Therefore, In this embodiment, the difference between the two is balanced by weighting, that is, the load is multiplied by the weight. For example, the number of driving pixels is multiplied by the weight. The pixel with a larger load corresponds to a larger weight, and the obtained load value is larger. , and the pixel with a smaller load corresponds to a smaller weight, and the obtained load value is smaller, so that an appropriate compensation amount can be obtained according to the load value obtained after weighting, thereby achieving the effect that the display brightness can be uniform.

It should be noted that, in some embodiments, the weight data can also be applied to the display panel 1 capable of displaying grayscale effects. Since the higher the gray scale, the higher the load, so when the same number of pixels are driven but the gray scale is different, an appropriate compensation amount can be obtained through the weighting method. The quantity is used as the basis for the load, and the gray scale can be further considered. Taking the pixels 13 on the two scan lines 11 as an example, if all the pixels 13 on the two scan lines 11 have the same characteristics and are all driven, in order to make the pixels 13 on one of the scan lines 11 display a higher gray scale, Then, its load can be multiplied by a larger weight, so that the load value is also larger, and then the compensation amount of its current can be increased to achieve a brighter picture, so that there is an obvious difference in gray scale between the two.

It should be noted that, in other embodiments, if the brightness under lighting 16 pixels is used as the benchmark, since the load value of lighting 12 pixels is greater than the load value of lighting 4 pixels, 12 pixels are lighting up. The current value to be compensated is smaller than the current value to be compensated for lighting 4 pixels, that is, the current value to be reduced for lighting 12 pixels is smaller than the current value to be reduced for lighting 4 pixels. In this case, when the load is larger, the required compensation amount is smaller; conversely, when the load is smaller, the required compensation amount is also larger.

The above-described embodiments are used to illustrate the concept of the present invention, and those skilled in the art can Modifications and changes are not limited to this. For example, please refer to FIG. 4 , which is a circuit block diagram of a driving circuit 3 according to another embodiment of the present invention. The driving circuit 3 is substantially the same as the driving circuit 2 of the foregoing embodiment, and therefore the same elements are denoted by the same symbols. The difference between the driving circuit 3 and the driving circuit 2 is that in a data driving circuit 32 of the driving circuit 3, every three current sources 221 corresponds to a data line 12, so every three current sources 221 can drive the corresponding data line 12 In addition, the compensation circuit 341 of the driving circuit 3 directly transmits the compensation signal CS to the data driving circuit 32 instead of to a power generator 30 of the driving circuit 3, that is, the data driving circuit 32 directly The compensation signal CS adjusts the current provided by the plurality of current sources 221 . In detail, if the brightness of a single pixel is used as the benchmark, when the required compensation amount is large, the three switches 223 can respectively control the currents of the three current sources 221 to flow to the corresponding pixels on the data line 12 . 13; Conversely, when the required compensation amount is small, the three switches 223 can respectively control the current of one of the three current sources 221 to flow to the pixel 13 on the corresponding data line 12, while the other two are not. flow in and adjust the output of the current. It should be noted that, in this embodiment, every three current sources 221 corresponds to one data line 12 as the implementation manner, but other numbers of current sources 221 may also correspond to one data line 12 , which is not the case in this embodiment. The form of disclosure is limited.

Since the driving circuits 2 and 3 in the embodiment of the present invention adjust the current output by the current source 221 according to the load state, the driving circuits 2 and 3 can be applied to different display panels. The load characteristics such as pixel size, impedance and capacitive reactance provided by the manufacturer correspond to the load reference values of the original panel, that is, the characteristics of pixel size, impedance and capacitive reactance, etc., to correct the brightness load curve and then correct the reference data of the load to the compensation amount. It can save the time of re-measurement and adjustment. In an embodiment of the present invention, the load reference value corresponding to the original panel may not be corresponding, and the simulation is performed according to the load characteristic of the new display panel to obtain a new luminance load curve graph and a new load-to-compensation amount reference data. In addition, since the present invention uses the current source 221 to provide the current to drive the pixels instead of driving the pixels with voltage, the brightness of the pixels can be precisely controlled, and the display quality of the display panel 1 can be improved.

As mentioned above, the stages in which the driving circuit 2 or 3 drives the plurality of pixels 13 may include a pre-charging stage, a current driving stage and a discharging stage. In detail, please also refer to FIG. 5 , which is a schematic diagram of waveforms of the data driving circuit 22 or 32 performing precharging, current driving, and discharging on the pixel 13 according to the embodiment of the present invention. In the pre-charging stage, the data driving circuit 22 or 32 provides the pre-charging voltage VPRE to some of the pixels 13, and the compensation circuit 241 of the control circuit 24 can control the power generator 20 to adjust and provide the voltage according to the load state of the data driving circuit 22 or 32 for driving some of the pixels 13. The voltage to the data driving circuit 22 or 32 adjusts the precharge voltage VPRE, and the data driving circuit 22 or 32 can also control the precharge voltage VPRE according to the compensation signal CS to precharge some of the pixels 13 . In the current driving stage, the power generator 20 can adjust the current supplied to the data driving circuit or 22 or 32 according to the compensation signal CS, and the data driving circuit 32 can also control the current output by the current source 221 to some of the pixels 13 according to the compensation signal CS . In the discharge stage, the data driving circuit 22 or 32 can further provide the discharge level VDIS to some of the pixels 13 , the power generator 20 can adjust the discharge level VDIS provided to the data driving circuit 22 according to the compensation signal CS, and the data driving circuit 32 also The discharge level VDIS can be adjusted according to the compensation signal CS and provided to some pixels 13 , which means that the control circuit 24 can adjust the discharge level VDIS according to the load state of the data driving circuit 22 or 32 for driving the partial pixels 13 .

Furthermore, as shown in FIG. 5, in the current driving stage, the control circuit 24 can adjust the current provided by the current source 221 according to the load state, so as to increase or decrease the current from a first current value IA (indicated by the solid line). It is adjusted down to a second current value IB (indicated by the dotted line), and maintained for a time T, wherein the time T is determined by the compensation circuit 341 of the control circuit 24 according to the load state, and then the control circuit 24 can adjust the current to return to the first current value IA, so that the current correction amount can be controlled more finely. Specifically, when adjusting from a lower first current value IA to a higher second current value IB, the compensation amount of the current can be increased, so that the current can be corrected upward to achieve the expected brightness, and the use of time T can be used together. , the brightness of the pixel 13 can be more accurately grasped, and similarly, the higher first current value IA can be adjusted to the lower second current value IB. this way Can also be used to create contrasting grayscale effects. In addition, it is also possible to adjust the current from the first current value IA up or down to the second current value IB at the starting point of the current driving phase until the current driving phase ends. The above-mentioned adjustment method can be determined according to the load state and usage requirements, and is not limited to the above-mentioned embodiment.

The operation of the driving circuit 2 or 3 can be summarized as a driving method 4 , as shown in FIG. 6 . Drive method 4 includes the following steps:

Step S1 : providing a precharge voltage to some of the pixels.

Step S2: providing current to drive some of the pixels.

Step S3: Adjust the current according to the load state of the driving part of the pixels.

Step S4 : adjusting the current from a first current value to a second current value according to the load state and maintaining it for a period of time.

Step S5: After maintaining the time, the adjusted current returns to the first current value.

Step S6: providing a discharge level to some of the pixels.

For the detailed description of the driving method 4, reference may be made to the above paragraphs, for example, the compensation amount is obtained by using the weight data, which will not be repeated for the sake of brevity.

To sum up, the driving circuits 2 , 3 and the driving method 4 of the present invention can adjust the current output by the current source 221 according to the load state of driving the plurality of pixels 13 , and adjust the brightness of the plurality of pixels 13 through the compensation of the current, and further In this way, the uneven brightness caused by the load difference can be effectively solved.

The above descriptions are only preferred embodiments of the present invention, and all equivalents are made according to the scope of the patent application of the present invention. Changes and modifications should all fall within the scope of the present invention.

1: Display panel

11: Scan line

12: Data line

13: Pixels

2: drive circuit

20: Power Generator

21: Scanning drive circuit

22: Data drive circuit

221: Current source

223: switch

23: Storage unit

24: Control circuit

241: Compensation circuit

243: Control Unit

GND: enable level

VCOMH: Disable voltage

VDIS: Discharge level

VPRE: Precharge Voltage

CS: Compensation signal

Claims (20)

A driving circuit for driving a display panel, the display panel includes a plurality of scanning lines, a plurality of data lines and a plurality of pixels, the driving circuit comprises: a scanning driving circuit, coupled to the plurality of scanning lines; a data driving circuit, coupled to connected to the plurality of data lines and having at least one current source for driving the plurality of pixels, the at least one current source provides at least one current; and a control circuit, coupled to the scan driving circuit and the data driving circuit, according to the data The driving circuit drives the load state of some pixels of the plurality of pixels to adjust the at least one current provided by the at least one current source; wherein the control circuit has a compensation circuit, and the compensation circuit generates a compensation according to a display data and a compensation reference data a signal to adjust the at least one current provided by the at least one current source. The driving circuit of claim 1, wherein the compensation circuit further generates the compensation signal according to the display data, a weight data and the compensation reference data. The driving circuit of claim 2, further comprising a storage unit, the storage unit is coupled to the compensation circuit and stores the weight data and the compensation reference data, the compensation reference data is a load-to-compensation amount reference data, the compensation The circuit obtains a load value according to the weight data and the display data, and generates the compensation signal according to the load value and the load pair compensation amount reference data. The driving circuit of claim 1, further comprising a power generator, the power generator is coupled to the scan driving circuit and the data driving circuit to provide the power required by the scan driving circuit and the data driving circuit, the The power generator is coupled to the control circuit, and the control circuit regulates a current output by the power generator to the at least one current source of the data driving circuit. The driving circuit of claim 1, further comprising a power generator, the power generator is coupled to the scan driving circuit and the data driving circuit to provide the power required by the scan driving circuit and the data driving circuit, the The control circuit adjusts the at least one current provided by the at least one current source of the data driving circuit. The driving circuit of claim 1, wherein the control circuit adjusts the at least one current provided by the at least one current source according to the load state of the part of the pixels driven by the data driving circuit, and adjusts the at least one current from a first current value to a second current value, and maintain for a period of time. The driving circuit of claim 6, wherein the control circuit determines the time according to the load state of the data driving circuit driving the part of the pixels. The driving circuit of claim 6, wherein the control circuit adjusts the at least one current from the first current value to the second current value, and after maintaining the time, adjusts the at least one current to return to the first current value. The driving circuit of claim 1, wherein the data driving circuit further provides a precharge voltage to the part of the pixels, and the control circuit adjusts the precharge voltage according to the load state of the part of the pixels driven by the data drive circuit. The driving circuit of claim 1, wherein the data driving circuit further provides a discharge level to the part of the pixels, and the control circuit adjusts the discharge level according to the load state of the part of the pixels driven by the data drive circuit. The driving circuit as claimed in claim 1, wherein the control circuit drives the load state of the part of the pixels according to the data driving circuit comprises that the control circuit knows, according to the display data, that the data driving circuit drives the pixels corresponding to the same scan line. quantity, and adjust the at least one current provided by the at least one current source. A driving method for a display panel, the display panel comprising a plurality of scan lines, a plurality of data lines and a plurality of pixels, the driving method comprising the steps of: providing at least one current to drive the plurality of pixels; and driving some pixels of the plurality of pixels according to The at least one current is adjusted according to the load state to drive the part of the pixels; wherein, the step of adjusting the at least one current is to adjust the at least one current according to a display data and a compensation reference data. The driving method of claim 12, wherein the step of adjusting the at least one current further adjusts the at least one current according to the display data, a weight data and the compensation reference data. The driving method of claim 13, wherein the compensation reference data is a load-to-compensation amount reference data, and the step of adjusting the at least one current comprises obtaining a load value according to the weight data and the display data, and according to the The load value and the load-to-compensation reference data adjust the at least one current. The driving method as claimed in claim 12, further comprising adjusting the at least one current from a first current value to a second current value according to a load state of driving the part of the pixels, and maintaining the current for a period of time. The driving method of claim 15, wherein the time is determined according to the load state of driving the part of the pixels. The driving method of claim 15, wherein after maintaining the at least one current for the time, further comprising adjusting the at least one current to return to the first current value. The driving method of claim 12, further comprising providing a precharge voltage to the part of the pixels, and adjusting the precharge voltage according to a load state for driving the part of the pixels. The driving method of claim 12, further comprising providing a discharge level to the part of the pixels, and adjusting the discharge level according to a load state for driving the part of the pixels. The driving method according to claim 12, adjusting the at least one current according to the load state of driving the part of the pixels includes knowing the number of pixels corresponding to the same scan line to be driven according to the display data.

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