CN111724737A

CN111724737A - Driving circuit and driving method of display panel

Info

Publication number: CN111724737A
Application number: CN202010198287.9A
Authority: CN
Inventors: 叶俊祺; 洪志德; 简嘉宏; 林奕辰; 颜国钦
Original assignee: Sitronix Technology Corp
Current assignee: Sitronix Technology Corp
Priority date: 2019-03-19
Filing date: 2020-03-19
Publication date: 2020-09-29
Also published as: TW202036515A; TWI760714B

Abstract

The invention discloses a driving circuit and a driving method, which are used for driving a display panel, wherein 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 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 a load state of a part of pixels of the plurality of pixels driven by the data driving circuit.

Description

Driving circuit and driving method of display panel

Technical Field

The present disclosure relates to a driving circuit and a driving method, and more particularly, to a driving circuit and a driving method for a display panel capable of achieving uniform display brightness.

Background

In a passive organic light emitting diode display, when the number of the bright display units (pixels) in one row is relatively larger than the number of the bright display units in the other rows, the power obtained by each display unit in the row is relatively lower than the power obtained by the bright display units in the other rows, that is, the load is large, which causes the brightness reduction, thereby causing the uneven brightness of the display picture. Therefore, the patent publication No. CN104575375B of the people's republic of china discloses a passive matrix organic light emitting diode display with a function of equalizing display luminance and a driving method thereof, which increases the display time and visually generates a luminance compensation effect by calculating the total number of display units to be driven on each scanning line and then adjusting the time length of the scanning driving period in a positive correlation manner according to the total number. In addition, the prior art also achieves the effect of matching and balancing the display brightness by adjusting the voltage level. In short, the prior art achieves the effect of brightness balance by using the technical methods of time compensation (adjusting the driving period) or voltage compensation (adjusting the driving voltage difference). However, the above driving method has disadvantages.

Disclosure of Invention

Therefore, it is a primary objective of the present invention to provide a driving circuit and a driving method for a display panel, which are different from the prior art, and can also solve the problem of inconsistent brightness and the disadvantages of the prior art.

The application discloses a driving circuit for driving a display panel, wherein the display panel comprises a plurality of scanning lines, a plurality of data lines and a plurality of pixels. The driving circuit includes: a scan 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 a load state of a part of pixels of the plurality of pixels driven by the data driving circuit.

The application also discloses a driving method for a display panel, wherein the display panel comprises a plurality of scanning lines, a plurality of data lines and a plurality of pixels. The driving method includes the steps of: providing at least one current to drive the plurality of pixels; and adjusting the at least one current according to the load state of a part of the pixels driving the plurality of pixels.

Therefore, the current output by the current source is adjusted according to the load state of the driven pixel, and the brightness of the driven pixel can be adjusted through the current compensation, so that the effect of uniform display brightness is achieved.

Drawings

Fig. 1 is a circuit block diagram of a driving circuit according to an embodiment of the present application.

Fig. 2 is a luminance load graph according to an embodiment of the present application.

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

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

Fig. 5 is a waveform diagram illustrating a data driving circuit pre-charging, current-driving, and discharging a pixel according to an embodiment of the present application.

Fig. 6 is a flowchart of a driving method according to an embodiment of the present application.

Wherein the reference numerals are as follows:

1 display panel

11 scanning line

12 data lines

13 pixels

2. 3 drive circuit

20. 30 power supply generator

21 scan driving circuit

22. 32 data driving circuit

221 current source

223 switch

23 storage unit

24 control circuit

241. 341 compensating circuit

243 control unit

GND enable level

IA first current value

IB second current value

Time T

VCOMH disable voltage

VDIS discharge level

VPRE precharge voltage

S1-S6

CS compensation signal

4 driving method

Detailed Description

Although certain terms are used herein to refer to particular components, those skilled in the art will appreciate that various names are possible for manufacturers to refer to the same components, and that the description and the claims are not intended to distinguish one component from another, but are to be construed broadly, in a manner that distinguishes and distinguishes between the components as a whole. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. Furthermore, the term "coupled" is intended to include any direct or indirect connection. Thus, if a first device couples to a second device, that connection may be through a direct connection, or through an indirect connection via other devices and other connections.

Referring to fig. 1, fig. 1 is a circuit block diagram of a driving circuit 2 according to an embodiment of the present disclosure. The driving circuit 2 is used for driving a display panel 1, and the display panel 1 includes a plurality of scanning lines 11, a plurality of data lines 12 and a plurality of pixels 13. The plurality of scan lines 11 are arranged horizontally and spaced apart from each other, and the plurality of data lines 12 are arranged vertically and staggered from the plurality of scan lines 11 and spaced apart from each other. Each pixel 13 is disposed at an intersection of the corresponding scan line 11 and the corresponding data line 12 and coupled to the scan line 11 and the data line 12, and each pixel 13 includes an Organic Light-Emitting Diode (OLED) and has a parasitic capacitance such as a coupling capacitance. In an embodiment of the present application, 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 embodiments, the pixel 13 may also be other types of display units, and is not limited thereto.

The driving circuit 2 includes a power generator 20, a scan 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 power, such as voltage or current, for the scan driving circuit 21 and the data driving circuit 22. The scan driving circuit 21 is coupled to the plurality of scan lines 11, and is configured to provide 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 with respect to the enable level GND, and the enable level GND may be a ground level. When the scan signal is at the enable level GND, the scan line 11 is scanned, and when 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 application, each current source 221 can be a current mirror capable of mirroring the current outputted from the power generator 20 to the data driving circuit 22. The plurality of switches 223 are respectively disposed 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, so that the plurality of pixels 13 can illuminate. Therefore, the data driving circuit 22 controls the switches 223 according to a display data to supply current to the pixels 13 to be driven. In an embodiment of the present application, the display data may 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 a Host (Host) of the electronic device directly transmits the display data to the data driving circuit 22.

In addition, during the period that the scan driving circuit 21 scans each row of the scan lines 11, the data driving circuit 22 may further provide a precharge voltage VPRE or a discharge level VDIS to the plurality of data lines 12, that is, provide the precharge voltage VPRE or the discharge level VDIS to some of the pixels 13. The data driving circuit 22 may enter a pre-charge phase before driving a part of the pixels 13 to pre-charge the pixels 13 to be driven, then enter a current driving phase (constant current phase) to provide current to the pixels 13 to be driven, and then enter a discharge phase (discharge phase) to provide a discharge level VDIS to the driven pixels 13 to discharge the driven pixels 13. In one embodiment of the present application, the discharge level VDIS may be the level of ground. As mentioned above, the switches 223 are also located between the pre-charge voltage VPRE and the data lines 13 and between the discharge level VDIS and the data lines 13, so that the data driving circuit 22 controls the switches 223 according to the display data to provide the pre-charge voltage VPRE or the discharge level VDIS to some pixels 13. It should be noted that each current source 221 corresponds to one data line 12, so that each current source 221 can drive the pixel 13 on the corresponding data line 12. In one embodiment of the present application, one current source 221 may correspond to a plurality of data lines 12 instead of only one data line 12, and the number of current sources 221 may be reduced, but a switch 223 is still disposed between each data line 12 and the current source 221.

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

In one embodiment of the present application, the load versus offset reference data is designed based on a luminance load graph as shown in fig. 2. The luminance load curve is obtained by experiment or simulation of the display panel of the display, and the luminance load curve of different panels is different because different panels have different characteristics due to manufacturing process, design, etc. As can be seen from the luminance load graph, at the same current, the luminance of the driven pixel is lower as the load is larger, and the luminance of the driven pixel is higher as the load is smaller. According to the luminance load graph and the set reference, as the dashed line in fig. 2 is used as the reference, when the load is small, the current is decreased to decrease the luminance, and when the load is large, the current is increased to increase the luminance, so that the pixels on the scan lines in different rows are driven and the load states of the pixels are different, for example, the number of the pixels is different, thereby preventing the luminance difference of the frames displayed by the pixels in different rows of the display panel 1 from being too large, and the luminance of the frames displayed by the display panel 1 can be more uniform.

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 for receiving the display data and the compensation reference data, generating a compensation signal CS according to the display data and the compensation reference data, and then transmitting the compensation signal CS to the power generator 20 for adjusting the current outputted from the power generator 20 to the data driving circuit 22, so as to adjust the current provided by the plurality of current sources 221. Therefore, the control circuit 24 can adjust the currents provided by the plurality of current sources 221 according to the load status of the data driving circuit 22 driving part 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 luminance of a single pixel is lighted (driven), the larger the load (i.e., the more pixels to be lighted), the larger the required compensation amount; conversely, the smaller the load, the smaller the amount of compensation required. Here, the "compensation amount" is the "current amount to be corrected". For example, assuming that there are 16 pixels on each scan line 11, when displaying a picture, 4 pixels on the first row of scan lines 11 need to be lit, and 12 pixels on the second row of scan lines 11 need to be lit, if the luminance of 1 pixel is taken as the reference, the load value of 12 pixels is greater than the load value of 4 pixels, so the current value compensated for lighting 12 pixels is greater than the current value compensated for lighting 4 pixels. In other words, the increased current value required to light 12 pixels is greater than the increased current value required to light 4 pixels.

Furthermore, assuming that there are 16 pixels on each row of the scan line 11, if the brightness of 1 pixel is taken as the reference, 16 pixels can be divided into four-step loads, 1 to 4 pixels are lighted as the first-step load, 5 to 8 pixels are lighted as the second-step load, 9 to 12 pixels are lighted as the third-step load, and 13 to 16 pixels are lighted as the fourth-step load, so the compensation amount of the first-step load is the least; the compensation amount of the fourth order load is the largest, and the compensation amount represents the increased current. In addition, in some embodiments, the load state may be divided into multiple stages by a binary digital representation. For example, assuming that there are 15 pixels on each row of the scan line 11, the luminance of 1 pixel is taken as the reference, which can be expressed by 4 bits and divided into four-level loads, such as the fourth-level load (e.g. 1000-1111) corresponding to 8-15 pixels, the third-level load (e.g. 0100-0111) corresponding to 4-7 pixels, the second-level load (e.g. 0010-0011) corresponding to 2-3 pixels, and the first-level load (e.g. 0001) corresponding to 1 pixel. The compensation circuit 241 can first determine whether the most significant bit (i.e., the 4 th bit) is 1; if yes, the compensation amount is the largest in the range of fourth-order load (1000-1111); if not, then determine if bit 3 is 1. When the 3 rd bit is 1, the compensation amount is less than the highest compensation amount within the range of the third order (0100-0111); when the 3 rd bit is 0, it is determined whether the 2 nd bit is 1, and so on. Wherein, the compensation amount of the first-order load (0001) is minimum, and even can not be compensated. The digital method can judge the corresponding compensation amount by only judging the highest position where the first 1 appears, and is convenient for judgment and compensation.

In some embodiments, the storage unit 23 further stores a weight data, the compensation circuit 241 obtains a weighted load value according to the weight data and the display data, generates the compensation signal CS according to the load value and the reference data of the compensation amount, and adjusts the current outputted by the power generator 20 through the compensation signal CS to adjust the currents provided by the plurality of current sources 221. Specifically, taking the pixels 13 on the two scan lines 11 as an example, if the load states of all the pixels 13 on one row of the scan lines 11 are greater than the load states of all the pixels 13 on the other row of the scan lines 11 (for example, the size of the pixels 13 is larger or the impedance of the pixels 13 is larger), in the case where the same current is supplied and all the pixels 13 are driven, the pixels 13 with a large load may be relatively dark, therefore, the present embodiment balances the difference between the two by weighting, i.e. the load is multiplied by the weight, for example, the number of the driving pixels is multiplied by the weight, the corresponding weight is larger for the pixel with larger load, the obtained load value is larger, the pixel with smaller load has smaller corresponding weight, and the obtained load value is smaller, so that appropriate compensation quantity can be obtained according to the load value obtained after weighting, and the effect that the display brightness can be uniform is achieved.

It should be noted that, in some embodiments, the weighting data may also be applied to the display panel 1 capable of displaying gray scale effect. Since a higher gray scale indicates a higher load, when the same number of pixels are driven but the gray scales are different, an appropriate compensation amount can be obtained by weighting, and the luminance load graph according to which the gray scale is not based only on the number of pixels to be driven but also can be considered. Taking the pixels 13 on the two scan lines 11 as an example, if the characteristics of all the pixels 13 on the two scan lines 11 are the same and all the pixels 13 are driven, and to make the pixels 13 on one row of the scan lines 11 display a higher gray scale, the load can be multiplied by a larger weight, so that the load value is also larger, and further the compensation amount of the current is increased, so as to achieve a brighter picture, and the difference between the two gray scales is obvious.

It should be noted that, in other embodiments, if the luminance of 16 pixels is taken as the reference, the load value for lighting 12 pixels is greater than the load value for lighting 4 pixels, so the current value compensated for lighting 12 pixels is smaller than the current value compensated for lighting 4 pixels, that is, the current value reduced for lighting 12 pixels is smaller than the current value reduced for lighting 4 pixels. In this case, the greater the load, the less compensation is required; conversely, the smaller the load, the greater the amount of compensation required.

The embodiments described above are intended to illustrate the concepts of the present application and those skilled in the art will be able to make modifications and alterations thereto, without being limited thereto. For example, refer to fig. 4, which is a schematic circuit block diagram of a driving circuit 3 according to another embodiment of the present application. The drive circuit 3 is substantially the same as the drive circuit 2 of the foregoing embodiment, and therefore the same components are denoted by the same symbols. The driving circuit 3 is different from the driving circuit 2 in that in a data driving circuit 32 of the driving circuit 3, every three current sources 221 correspond to a data line 12, so that every three current sources 221 can drive the pixels 13 on the corresponding data lines 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 transmitting the compensation signal CS to a power generator 30 of the driving circuit 3, i.e., the data driving circuit 32 directly adjusts the currents provided by the plurality of current sources 221 according to the compensation signal CS of the compensation circuit 341. In detail, if the brightness of a single pixel is used as the reference, when the required compensation amount is large, the three switches 223 can respectively control the currents of the three current sources 221 to all flow to the corresponding pixels 13 on the data lines 12; 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 corresponding pixel 13 on the data line 12, and the other two current sources do not flow in, thereby adjusting the output of the current. It should be noted that, in the embodiment, each three current sources 221 are implemented to correspond to one data line 12, but other numbers of current sources 221 may also correspond to one data line 12, and the aspects disclosed in the embodiment are not limited.

Since the driving

circuits

2 and 3 of the embodiment of the present invention adjust the current outputted by the current source 221 according to the load state, the driving

circuits

2 and 3 can be applied to different display panels, for example, to drive a new display panel, the luminance load curve diagram can be corrected by the load characteristics such as pixel size, impedance and capacitive reactance provided by the panel manufacturer, and the load reference value of the original panel, that is, the pixel size, impedance and capacitive reactance, so as to correct the load-to-compensation reference data, thereby saving the time for re-measurement and adjustment. In an embodiment of the present application, a simulation may be performed according to the load characteristics of the new display panel without the load reference value corresponding to the original panel, so as to obtain a new luminance load curve graph and new load-to-compensation reference data. In addition, since the current source 221 is used to provide current to drive the pixels, rather than 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 driving stages of the driving

circuit

2 or 3 for driving the plurality of pixels 13 may include a pre-charge stage, a current driving stage and a discharge stage. In detail, fig. 5 is a schematic diagram of waveforms of the

data driving circuit

22 or 32 performing the pre-charge, current driving, and discharge on the pixel 13 according to the embodiment of the present application. In the pre-charge stage, the

data driving circuit

22 or 32 provides the pre-charge voltage VPRE to a portion of the pixels 13, the compensation circuit 241 of the control circuit 24 can control the power generator 20 to adjust the voltage provided to the

data driving circuit

22 or 32 according to the load condition of the

data driving circuit

22 or 32 driving a portion of the pixels 13, so as to adjust the pre-charge voltage VPRE, and the

data driving circuit

22 or 32 can also control the pre-charge voltage VPRE according to the compensation signal CS to pre-charge a portion of the pixels 13. In the current driving phase, the power generator 20 can adjust the current provided to the

data driving circuit

22 or 32 according to the compensation signal CS, and the data driving circuit 32 can also control the current outputted by the current source 221 to a portion of the pixels 13 according to the compensation signal CS. In the discharging stage, the

data driving circuit

22 or 32 can further provide the discharging level VDIS to the partial pixels 13, the power generator 20 can adjust the discharging level VDIS provided to the data driving circuit 22 according to the compensation signal CS, and the data driving circuit 32 can also adjust the discharging level VDIS provided to the partial pixels 13 according to the compensation signal CS, which means that the control circuit 24 can adjust the discharging level VDIS according to the load status of the partial pixels 13 driven by the

data driving circuit

22 or 32.

More specifically, as shown in fig. 5, in the current driving phase, the control circuit 24 adjusts the current provided by the load adjusting current source 221 from a first current value IA (indicated by a solid line) to a second current value IB (indicated by a dashed line) according to the load condition, and maintains a time T, which is determined by the compensation circuit 341 of the control circuit 24 according to the load condition, and then the control circuit 24 can adjust the current to return to the first current value IA, so as to control the current correction amount more finely. Specifically, when the first current value IA is adjusted to the second current value IB, the compensation amount of the current can be increased to correct the current to reach the expected brightness, and the brightness of the pixel 13 can be accurately obtained by using the time T. This approach can also be applied to produce contrast gray scale effects. In addition, the current can also be adjusted from the first current value IA to the second current value IB at the beginning of the current driving phase until the end of the current driving phase. The adjustment method may be determined according to the load status and the usage requirement, and is not limited to the above embodiment.

The operation of the driving

circuit

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

step S1: providing a pre-charge voltage to some pixels.

Step S2: current is supplied to drive a portion of the pixels.

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

Step S4: the current is adjusted from a first current value to a second current value according to the load state and is maintained for a time.

Step S5: and after maintaining the time, adjusting the current to return to the first current value.

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

For a detailed description of the driving method 4, reference may be made to the above paragraphs, for example, to obtain the compensation amount by using the weight data, which are not described again for brevity.

In summary, the driving

circuits

2 and 3 and the driving method 4 of the present application can adjust the current output by the current source 221 according to the load state of the plurality of pixels 13, and adjust the brightness of the plurality of pixels 13 by current compensation, so as to achieve the effect of uniform display brightness, and thus, the problem of uneven brightness caused by load difference can be effectively solved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A driving circuit for driving a display panel, the display panel including a plurality of scan lines, a plurality of data lines and a plurality of pixels, the driving circuit comprising:

a scan driving circuit coupled to the plurality of scan lines;

a data driving circuit coupled to the data lines and having at least one current source for driving the pixels, the at least one current source providing at least one current; and

and the control circuit is coupled with the scanning drive circuit and the data drive circuit and adjusts the at least one current provided by the at least one current source according to the load state of partial pixels of the plurality of pixels driven by the data drive circuit.

2. The driving circuit of claim 1, wherein the control circuit has a compensation circuit, the compensation circuit generating a compensation signal according to a display data and a compensation reference data to adjust the at least one current provided by the at least one current source.

3. The driving circuit of claim 2, wherein the compensation circuit further generates the compensation signal according to the display data, a weight data and the compensation reference data.

4. The driving circuit as claimed in claim 3, further comprising a storage unit coupled to the compensation circuit and storing the weight data and the compensation reference data, wherein the compensation reference data is a load-to-compensation reference data, the compensation 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-to-compensation reference data.

5. The driving circuit as claimed in claim 1, further comprising a power generator coupled to the scan driving circuit and the data driving circuit for providing power required by the scan driving circuit and the data driving circuit, the power generator being coupled to the control circuit, the control circuit regulating a current of the at least one current source outputted from the power generator to the data driving circuit.

6. The driving circuit of claim 1, further comprising a power generator coupled to the scan driving circuit and the data driving circuit for providing power required by the scan driving circuit and the data driving circuit, wherein the control circuit adjusts the at least one current provided by the at least one current source of the data driving circuit.

7. The driving circuit according to claim 1, wherein the control circuit adjusts the at least one current provided by the at least one current source according to a load condition of the data driving circuit driving the portion of pixels, adjusts the at least one current from a first current value to a second current value, and maintains the at least one current for a certain time.

8. The driving circuit according to claim 7, wherein the control circuit determines the time according to a load state of the data driving circuit driving the portion of the pixels.

9. The driving circuit as claimed in claim 7, wherein the control circuit adjusts the at least one current from the first current value to the second current value, and adjusts the at least one current to return to the first current value after the time.

10. The driving circuit as claimed in claim 1, wherein the data driving circuit further provides a pre-charge voltage to the portion of the pixels, and the control circuit adjusts the pre-charge voltage according to a load condition of the data driving circuit driving the portion of the pixels.

11. The driving circuit of claim 1, wherein the data driving circuit further provides a discharge level to the portion of the pixels, and the control circuit adjusts the discharge level according to a load condition of the portion of the pixels driven by the data driving circuit.

12. The driving circuit of claim 1, wherein the controlling circuit driving the portion of the pixels according to the loading status of the data driving circuit comprises the controlling circuit adjusting the at least one current provided by the at least one current source according to a display data indicating a number of pixels corresponding to a same scan line driven by the data driving circuit.

13. A driving method for a display panel, the display panel including a plurality of scan lines, a plurality of data lines and a plurality of pixels, the driving method comprising:

providing at least one current to drive the plurality of pixels; and

adjusting the at least one current according to the load status of a part of the pixels driving the plurality of pixels.

14. The driving method as claimed in claim 13, wherein the step of adjusting the at least one current adjusts the at least one current according to a display data and a compensation reference data.

15. The driving method as claimed in claim 14, wherein the step of adjusting the at least one current further adjusts the at least one current according to the display data, a weighting data and the compensation reference data.

16. The driving method as claimed in claim 15, wherein the compensation reference data is a load compensation reference data, and the step of adjusting the at least one current comprises obtaining a load value according to the weighting data and the display data, and adjusting the at least one current according to the load value and the load compensation reference data.

17. The driving method according to claim 13, further comprising adjusting the at least one current from a first current value to a second current value according to a load condition of driving the portion of pixels and maintaining the at least one current for a time.

18. The driving method as claimed in claim 17, wherein the time is determined according to a load condition for driving the portion of the pixels.

19. The driving method as claimed in claim 17, wherein maintaining the at least one current for the time period further comprises adjusting the at least one current to return to the first current value.

20. The driving method according to claim 13, further comprising providing a precharge voltage to the portion of pixels and adjusting the precharge voltage according to a load condition for driving the portion of pixels.

21. The driving method according to claim 13, further comprising providing a discharge level to the portion of the pixels and adjusting the discharge level according to a load condition for driving the portion of the pixels.

22. The driving method according to claim 13, wherein adjusting the at least one current according to the load condition of the part of the pixels comprises adjusting the at least one current according to a display data indicating the number of pixels driven corresponding to the same scan line.