TW202029173A - Driving method - Google Patents

Abstract

A driving method is applied to a display device. The driving method includes following steps: receiving a data voltage from a source driving circuit and a reference voltage from a power supply circuit by a pixel circuit; adjusting the reference voltage M times within M times period by the power supply circuit; adjusting the data voltage N times in one of the M times period by the source driving circuit; and receiving the data voltage and the reference voltage and controlling a driving current flowing through the light emitting diode according to the data voltage and the reference voltage by a pixel circuit.

Description

Driving method

This disclosure relates to a driving method, especially a driving method for adjusting brightness.

With the rapid development of display technology, wearable devices (smart watches, smart bracelets) have been widely used in people’s lives. Generally, in order to clearly recognize images in high-brightness environments, wearable devices will automatically adjust the brightness Switch from the normal mode (Normal Mode) to the high brightness mode (High Brightness Mode) to increase the brightness of the display. However, if the switching speed from the normal mode to the high-brightness mode is too fast, the user's eyes may feel uncomfortable due to the rapid brightness change.

The present invention provides a driving method, which mainly controls the cross voltage of the pixel circuit, and adjusts the brightness of the light emitting diode within a period of time by increasing or decreasing the cross voltage of the pixel circuit to achieve gradual brightness or gradual brightness. The dark effect makes people's eyes not uncomfortable due to excessive changes in brightness.

The first aspect of this case is to provide a driving method suitable for a display device, wherein the display device includes a source drive circuit and a gate drive Circuit and a plurality of pixel circuits. The driving method includes the following steps: the pixel circuit receives the first data voltage output by the source driving circuit and the first reference voltage output by the power supply circuit, and controls the flow through the light emitting diode according to the first data voltage and the first reference voltage In the first period, the power supply circuit adjusts the first reference voltage to the second reference voltage; in the first period, the source driver circuit adjusts the first data voltage to the second data voltage, and the source The pole driving circuit adjusts the second data voltage to a third data voltage, the first data voltage, the second data voltage, and the third data voltage are different from each other; and the pixel circuit receives the third data voltage and the second reference voltage, and The driving current flowing through the light emitting diode is controlled according to the third data voltage and the second reference voltage.

The second aspect of this case is to provide a driving method suitable for a display device. The display device includes a source driving circuit, a gate driving circuit, and a plurality of pixel circuits. The driving method includes the following steps: the pixel circuit receives the source The data voltage output by the driver circuit and the reference voltage output by the power supply circuit; in M periods, the power supply circuit adjusts the reference voltage M times; in one of the M periods, the source driver circuit adjusts the data voltage N times; and the pixel circuit receives the data voltage and the reference voltage, and controls the driving current flowing through the light-emitting diode according to the data voltage and the reference voltage.

The third aspect of the present case is to provide a driving method suitable for a display device. The display device includes a source driving circuit, a gate driving circuit, and a plurality of pixel circuits. The driving method includes: the pixel circuit receives the source driving The first data voltage output by the circuit and the power supply circuit Output the first reference voltage, and control the driving current flowing through the light-emitting diode according to the first reference voltage; within the time period, the power supply circuit adjusts the first reference voltage to the second reference voltage; and the pixel circuit receives the data voltage And a second reference voltage, and control the driving current flowing through the light emitting diode according to the data voltage and the second reference voltage.

The fourth aspect of this case is to provide a driving method suitable for a display device, wherein the display device includes a source driving circuit, a gate driving circuit, and a plurality of pixel circuits. The driving method includes: the pixel circuit receives the source driving The first data voltage output by the circuit and the reference voltage output by the power supply circuit, and the driving current flowing through the light-emitting diode is controlled according to the first data voltage; in the period, the source driving circuit adjusts the first data voltage to the first Two data voltages, and the source driving circuit adjusts the second data voltage to a third data voltage. The first data voltage, the second data voltage and the third data voltage are different from each other; and the pixel circuit receives the third data voltage, and Reference voltage, and control the driving current flowing through the light emitting diode according to the third data voltage and the reference voltage; wherein, there is a data voltage difference between the first data voltage and the second data voltage, and the second data voltage and the third data voltage There is a data voltage difference between the voltages.

The driving method of the present disclosure mainly controls the cross voltage of the pixel circuit, and adjusts the brightness of the light-emitting diode within a period of time by increasing or decreasing the cross voltage of the pixel circuit in stages to achieve gradual brightening or gradual dimming. The effect is that the eyes will not feel discomfort due to excessive changes in brightness.

100‧‧‧Display device

110‧‧‧Source drive circuit

120‧‧‧Gate drive circuit

130‧‧‧Pixel circuit

131‧‧‧Write circuit

132‧‧‧Compensation circuit

133‧‧‧Reset circuit

134‧‧‧Drive circuit

140‧‧‧Power supply circuit

300, 500, 600, 700‧‧‧Drive method

T1~T8‧‧‧Transistor

C1‧‧‧Capacitor

OVDD‧‧‧Power supply high voltage

OVSS‧‧‧Power supply low voltage

S1~S3‧‧‧Scan signal

CTL‧‧‧Control signal

Vref‧‧‧Reference voltage

Id‧‧‧Drive current

OLED‧‧‧Light Emitting Diode

Vref1, Vref2, Vrefn‧‧‧Reference voltage level

Vref_diff‧‧‧reference voltage difference

Vdata‧‧‧Data voltage

Vdata1, Vdata2, Vdata3, Vdatan‧‧‧Data voltage level

Vdata_diff‧‧‧Data voltage difference

T1, Tm‧‧‧Time

S310~S340, S510~S540, S610~S630, S710~S730‧‧‧Step

In order to make the above and other objectives, features, advantages and embodiments of the disclosure document more comprehensible, the description of the accompanying drawings is as follows: Figure 1 is a schematic diagram of a display device according to an embodiment of the disclosure; Figure 2 Is a circuit diagram of a pixel circuit according to an embodiment of this disclosure; FIG. 3 is a flowchart of a driving method according to an embodiment of this disclosure; FIG. 4A is a data voltage and reference voltage according to an embodiment of this disclosure Fig. 4B is a schematic diagram of data voltage and reference voltage according to an embodiment of the present disclosure; Fig. 5 is a flowchart of a driving method according to an embodiment of the present disclosure; Fig. 6A is a diagram according to an embodiment of the present disclosure A flowchart of the driving method of an embodiment; FIG. 6B is a schematic diagram of a reference voltage according to an embodiment of the present disclosure; FIG. 6C is a schematic diagram of a reference voltage according to an embodiment of the present disclosure; FIG. 7A is a schematic diagram of a reference voltage according to an embodiment of the present disclosure A flowchart of a driving method according to an embodiment of the document; FIG. 7B is a schematic diagram of a data voltage according to an embodiment of the present disclosure; and FIG. 7C is a schematic diagram of data voltage according to an embodiment of the present disclosure.

The embodiments of the present invention will be described below in conjunction with related drawings. In the drawings, the same reference numerals indicate the same or similar elements or method flows.

Please refer to Figure 1. FIG. 1 is a schematic diagram of a display device 100 according to an embodiment of the present disclosure. As shown in FIG. 1, the display device 100 includes a source driving circuit 110, a gate driving circuit 120, a pixel circuit 130 and a power supply circuit 140. For the pixel circuit 130, please further refer to FIG. 2. FIG. 2 is a circuit diagram of the pixel circuit 130 according to an embodiment of the present disclosure. The pixel circuit 130 shown in FIG. 2 has a structure of 8 transistors and 1 capacitor (8T1C). This pixel circuit 130 is a conventional pixel circuit structure, and this pixel circuit is used in this disclosure Structure to match instructions. The present disclosure does not necessarily need to be combined with this pixel circuit 130 structure, and can also be implemented with other pixel circuit structures.

The pixel circuit 130 includes a writing circuit 131, a compensation circuit 132, a reset circuit 133, a driving circuit 134, and a light emitting diode OLED. The writing circuit 131 is electrically coupled to the compensation circuit 132 and the driving circuit 134, the compensation circuit 132 is electrically coupled to the reset circuit 133 and the driving circuit 134, and the reset circuit 133 is electrically coupled to the light emitting diode OLED. The light emitting diode OLED is electrically coupled to the compensation circuit 132 and the reset circuit 133 for receiving the power low voltage OVSS.

In view of the above, the writing circuit 131 includes transistors T1 and T2 and The capacitor C1 and the writing circuit 131 are used to receive the control signal CTL, the scan signal S3, the reference voltage Vref, and the data voltage Vdata. The compensation circuit 132 includes transistors T3, T4, T5, and T6. The compensation circuit 132 receives the control signal CTL, the scan signals S1 and S3, and the reference voltage Vref and generates a compensation voltage. The reset circuit 133 includes a transistor T7 for receiving the scan signal S2 and resetting the voltage level of the driving circuit 134. The driving circuit 134 includes a transistor T8 for receiving the power supply high voltage OVDD, and for generating a driving current Id flowing through the light emitting diode OLED. In the compensation phase, that is, the light-emitting phase, the writing circuit 131 is used to generate a driving signal to the control terminal of the transistor T8. The driving signal is determined according to the reference voltage Vref and the data voltage Vdata.

Please refer to Figure 1 to Figure 3 together. FIG. 3 is a flowchart of a driving method 300 according to an embodiment of the present disclosure. As shown in FIG. 3, the driving method 300 is applicable to the display device 100 to control the driving current Id flowing through the light emitting diode OLED. The driving method 300 first executes step S310. The pixel circuit 130 receives the data voltage Vdata output by the source driving circuit 110 and the reference voltage Vref output by the power supply circuit 140, and controls the flow through the light emitting diode according to the data voltage Vdata and the reference voltage Vref. Drive current Id of the bulk OLED.

Please refer to FIG. 4A, which is a schematic diagram of the data voltage Vdata and the reference voltage Vref according to an embodiment of the present disclosure. As shown in FIG. 4A, the reference voltage Vref has a first reference voltage level Vref1, and the data voltage Vdata has a first data voltage level Vdata1. In one embodiment, the first reference voltage level Vref1 and the first data voltage level Vdata1 can determine the brightness of the light emitting diode OLED display in the general mode. The general brightness mode is set to 350nits here. The data voltage Vdata is a positive voltage and the reference voltage Vref is a negative voltage.

Next, the driving method 300 executes step S320. During the first period T1, the power supply circuit 140 adjusts the voltage level of the reference voltage Vref. In one embodiment, the power supply circuit 140 adjusts the reference voltage Vref from the first reference voltage level Vref1 to the second reference voltage level Vref2. As shown in FIG. 4A, the power supply circuit 140 increases the negative voltage of the reference voltage Vref. Therefore, the second reference voltage level Vref2 is adjusted to be smaller than the first reference voltage level Vref1. The second reference voltage level Vref2 and the first reference voltage There is a reference voltage difference Vref_diff between the levels Vref1. For example, the second reference voltage level Vref2 is -10V, and the first reference voltage level Vref1 is -5V. In this case, the reference voltage difference Vref_diff is -10V-(-5V)=-5V, so the reference The voltage difference Vref_diff is a negative value.

Next, the driving method 300 executes step S330. In the first period T1, the source driving circuit 110 adjusts the voltage level of the data voltage Vdata. In one embodiment, the source driving circuit 110 first adjusts the data voltage Vdata from the first data voltage level Vdata1 to the second data voltage level Vdata2, and then adjusts the second data voltage level Vdata2 to the third data voltage level Standard Vdata3. As shown in FIG. 4A, the source driving circuit 110 increases the positive voltage of the data voltage Vdata. Therefore, adjusting the second data voltage level Vdata2 will be greater than the first data voltage level Vdata1, and the third data voltage level Vdata3 will be greater than the first data voltage level Vdata1. The second data voltage level Vdata2 is large, the third data voltage level Vdata3 and the second data voltage level Vdata2 have a data voltage difference Vdata_diff, and the second data voltage level Vdata2 is compared with the first data voltage level. There is also a data voltage difference Vdata_diff between the voltage levels Vdata1.

For example, the third data voltage level Vdata3 is 15V, the second data voltage level Vdata2 is 10V, and the first data voltage level Vdata1 is 5V. In this case, the data voltage difference Vdata_diff is 15V-10V=5V , Therefore the data voltage difference Vdata_diff is a positive value. As a result, the reference voltage Vref will continue to decrease, the data voltage Vata will continue to increase, and the voltage difference between the reference voltage Vref and the data voltage Vata will continue to expand, and the brightness can be gradually increased from the normal mode to the high brightness mode.

Next, the driving method 300 executes step S340. The pixel circuit 130 receives the data voltage Vdata and the reference voltage Vref, and controls the flow through the light emitting diode OLED according to the third data voltage level Vdata3 and the second reference voltage level Vref2. Drive current Id. As shown in Figure 4A, the high-brightness mode is set to 1000nits here. The adjustment from 350nits in the normal brightness mode to 1000nits in the high-brightness mode can be divided into multiple periods and the brightness adjustment lasts approximately 30 to 80 milliseconds. The first period T1 is approximately It is 5~15 milliseconds, so there will be about 5~8 periods during the brightness adjustment. In the last time period Tm, the data voltage Vdata is adjusted to the final data voltage level Vdatan and the reference voltage Vref is adjusted to the final reference voltage level Vrefn to determine the driving current Id of the light emitting diode OLED.

In one embodiment, please refer to FIG. 4B. FIG. 4B is a schematic diagram of the data voltage Vdata and the reference voltage Vref according to an embodiment of the present disclosure. As shown in FIG. 4B, the power supply circuit 140 adjusts the reference voltage Vref from the first reference voltage level Vref1 to the second reference voltage level Vref2, and the power supply circuit 140 reduces the negative voltage of the reference voltage Vref, so Adjusting the second reference voltage level Vref2 will be greater than the first reference voltage level Vref1, and there is a reference voltage difference Vref_diff between the second reference voltage level Vref2 and the first reference voltage level Vref1. For example, the second reference voltage level Vref2 is -5V, and the first reference voltage level Vref1 is -10V. In this case, the reference voltage difference Vref_diff is -5V-(-10V)=5V, so the reference voltage The difference amount Vref_diff is a positive value.

In view of the above, the source driving circuit 110 first adjusts the data voltage Vdata from the first data voltage level Vdata1 to the second data voltage level Vdata2, and then adjusts the second data voltage level Vdata2 to the third data voltage level Vdata3. The source driving circuit 110 reduces the positive voltage of the data voltage Vdata, so the second data voltage level Vdata2 is adjusted to be lower than the first data voltage level Vdata1, and the third data voltage level Vdata3 is lower than the second data voltage level Vdata2. The third data voltage level Vdata3 and the second data voltage level Vdata2 have a data voltage difference Vdata_diff, and the second data voltage level Vdata2 and the first data voltage level Vdata1 also have a data voltage difference Vdata_diff.

For example, the third data voltage level Vdata3 is 5V, the second data voltage level Vdata2 is 10V, and the first data voltage level Vdata1 is 15V. In this case, the data voltage difference Vdata_diff is 5V-10V=- 5V, so the data voltage difference Vdata_diff is a negative value. As a result, the reference voltage Vref will continue to increase, the data voltage Vata will continue to decrease, and the voltage difference between the reference voltage Vref and the data voltage Vata will continue to shrink, and the brightness can gradually decrease from the high-brightness mode to the normal mode.

In another embodiment, please refer to Figure 5, which is based on A flowchart of a driving method 500 according to an embodiment of the present disclosure. The driving method 500 is applicable to the display device 100. The driving method 500 executes steps S510 and S520. The pixel circuit 130 receives the data voltage Vdata output by the source driving circuit 110 and the reference voltage Vref output by the power supply circuit 140, and then M Within a period of time, the power supply circuit 140 adjusts the reference voltage Vref M times.

In view of the above, please refer to Figure 4A and Figure 4B together. As shown in Figure 4A, the high-brightness mode is set to 1000nits here. Adjusting from 350nits in the normal brightness mode to 1000nits in the high-brightness mode can be divided into M periods and The brightness adjustment lasts approximately 30 to 80 milliseconds, and the first period T1 is approximately 5 to 15 milliseconds, so there may be 5 to 8 periods during the brightness adjustment. In this way, the reference voltage Vref will be adjusted at least 5 to 8 times.

In view of the above, the driving method 500 executes step S530 in one of the M time periods, and the source driving circuit 110 adjusts the data voltage Vdata N times. For example, in the embodiment shown in FIG. 4A and FIG. 4B, the data voltage Vdata is adjusted twice. The number of adjustments of the data voltage Vdata can also be adjusted as appropriate, and the present invention is not limited thereto.

In view of the above, the driving method 500 executes step S540. The pixel circuit 130 receives the data voltage Vdata and the reference voltage Vref, and controls the driving current Id flowing through the light emitting diode OLED according to the data voltage Vdata and the reference voltage Vref. The operation of step S540 is the same as that of step S340, and will not be repeated here. As shown in FIGS. 4A and 4B, in M time periods, the power supply circuit 140 adjusts the reference voltage Vref M times, and the source driving circuit 110 adjusts the data voltage Vdata M*N times.

In another embodiment, please refer to FIG. 6A, FIG. 6B, and FIG. 6C together. FIG. 6A is a flowchart of a driving method 600 according to an embodiment of the present disclosure, and FIG. 6B and FIG. 6C are A schematic diagram of a reference voltage according to an embodiment of the present disclosure. The driving method 600 is applicable to the display device 100. The driving method 600 executes step S610. The pixel circuit 130 receives the data voltage Vdata output by the source driving circuit 110 and the reference voltage Vref output by the power supply circuit 140, and controls according to the reference voltage Vref The driving current Id flowing through the light-emitting diode OLED. As shown in Figure 6B, the reference voltage Vref has a first reference voltage level Vref1. In one embodiment, the first reference voltage Vref1 and the data voltage Vdata can determine the brightness of the light-emitting diode OLED display in the normal mode. Set it to 350nits here.

Next, the driving method 600 executes step S620. During the period T1, the power supply circuit 140 adjusts the voltage level of the reference voltage Vref. As shown in FIG. 6B, the power supply circuit 140 increases the negative voltage of the reference voltage Vref, and adjusts the reference voltage Vref from the first reference voltage level Vref1 to the second reference voltage level Vref2. Therefore, the reference voltage Vref and the data voltage Vata can be changed. The voltage difference between them continues to expand, and the brightness can be gradually increased from the normal mode to the high brightness mode.

In view of the above, as shown in FIG. 6C, the power supply circuit 140 reduces the negative voltage of the reference voltage Vref, and adjusts the reference voltage Vref from the first reference voltage level Vref1 to the second reference voltage level Vref2. Therefore, the reference voltage Vref can be compared with The voltage difference between the data voltage Vata continues to decrease, and the brightness can gradually decrease from the high-brightness mode to the normal mode.

Next, the driving method 600 executes step S630. The pixel circuit 130 receives the data voltage Vdata and the reference voltage Vref, and controls the flow through the light emitting diode OLED according to the voltage level of the data voltage Vdata and the second reference voltage level Vref2 of the reference voltage Vref. The drive current Id. As shown in Figure 6B, the high-brightness mode is set to 1000nits here, and the adjustment from 350nits in the normal brightness mode to 1000nits in the high-brightness mode can be divided into multiple periods. In the last period Tm, the reference voltage Vref is adjusted to the final reference voltage. The level Vrefn is used to determine the driving current Id of the light-emitting diode OLED. Similarly, as shown in Fig. 6C, by adjusting the voltage level of the reference voltage Vref, the 1000nits in the high-brightness mode can also be adjusted back to the 350nits in the normal-brightness mode.

In another embodiment, please refer to FIG. 7A, FIG. 7B and FIG. 7C together. FIG. 7A is a flowchart of a driving method 700 according to an embodiment of the present disclosure, and FIG. 7B and FIG. 7C are A schematic diagram of a reference voltage according to an embodiment of the present disclosure. The driving method 700 is applicable to the display device 100. The driving method 700 executes step S710. The pixel circuit 130 receives the data voltage Vdata output by the source driving circuit 110 and the reference voltage Vref output by the power supply circuit 140, and controls according to the data voltage Vdata The driving current Id flowing through the light-emitting diode OLED. As shown in FIG. 7B, the reference voltage Vdata has a first data voltage level Vdata1. In one embodiment, the reference voltage Vref and the first data voltage Vdata1 can determine the brightness of the light emitting diode OLED display in the normal mode. Set it to 350nits here.

Next, the driving method 700 executes step S720 in the time period T1 Inside, the source driving circuit 110 adjusts the voltage level of the data voltage Vdata. As shown in FIG. 7B, the source driving circuit 110 increases the positive voltage of the data voltage Vdata, adjusts the data voltage Vdata from the first data voltage level Vdata1 to the second data voltage level Vdata2, and then adjusts the second data voltage level Vdata2 is adjusted to the third data voltage level Vdata3, so the voltage difference between the reference voltage Vref and the data voltage Vdata can be continuously expanded, and the brightness can be gradually increased from the normal mode to the high brightness mode.

In view of the above, as shown in FIG. 7C, the source driving circuit 110 reduces the positive voltage of the data voltage Vdata, adjusts the data voltage Vdata from the first data voltage level Vdata1 to the second data voltage level Vdata2, and then adjusts the second data voltage level Vdata2. The voltage level Vdata2 is adjusted to the third data voltage level Vdata3, so the voltage difference between the reference voltage Vref and the data voltage Vata can be continuously reduced, and the brightness can be gradually reduced from the high-brightness mode to the normal mode.

Next, the driving method 700 executes step S730. The pixel circuit 130 receives the data voltage Vdata and the reference voltage Vref, and controls the flow through the light emitting diode OLED according to the third data voltage level Vdata3 of the data voltage Vdata and the voltage level of the reference voltage Vref. The drive current Id. As shown in Figure 7B, the high-brightness mode is set to 1000nits here. The adjustment from 350nits in the normal brightness mode to 1000nits in the high-brightness mode can be divided into multiple periods. In the last period Tm, the data voltage Vdata is adjusted to the final data voltage. The level Vdatan is used to determine the driving current Id of the light-emitting diode OLED. Similarly, as shown in Figure 7C, by adjusting the voltage level of the data voltage Vdata, the 1000nits of the high-brightness mode can also be adjusted back to normal brightness. 350nits in degree mode.

In summary, the driving method of the present disclosure mainly adjusts the data voltage and the reference voltage to control the cross voltage of the pixel circuit, and uses the method of increasing or decreasing the data voltage and the reference voltage in stages to make the brightness of the LED display It can gradually become brighter or darker within a period of time, so that people's eyes will not feel discomfort due to excessive changes in brightness.

Certain words are used in the specification and the scope of the patent application to refer to specific elements. However, those with ordinary knowledge in the technical field should understand that the same element may be called by different terms. The specification and the scope of the patent application do not use the difference in names as a way of distinguishing elements, but the difference in function of the elements as the basis for distinguishing. The "including" mentioned in the specification and the scope of the patent application is an open term, so it should be interpreted as "including but not limited to". In addition, "coupling" here includes any direct and indirect connection means. Therefore, if it is described that the first element is coupled to the second element, it means that the first element can be directly connected to the second element through electrical connection, wireless transmission, optical transmission, or other signal connection methods, or through other elements or connections. The means is indirectly connected to the second element electrically or signally.

In addition, unless otherwise specified in the specification, any term in the singular case also includes the meaning of the plural case.

The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should fall within the scope of the present invention.

100‧‧‧Display device

110‧‧‧Source drive circuit

120‧‧‧Gate drive circuit

130‧‧‧Pixel circuit

140‧‧‧Power supply circuit

Vref‧‧‧Reference voltage

Claims (15)

A driving method suitable for a display device, wherein the display device includes a source driving circuit, a gate driving circuit, and a plurality of pixel circuits. The driving method includes: the pixel circuits receive the source driving circuit Output a first data voltage and a first reference voltage output by a power supply circuit, and control a driving current flowing through a light emitting diode according to the first data voltage and the first reference voltage; in a first In a period, the power supply circuit adjusts the first reference voltage to a second reference voltage; in the first period, the source driver circuit adjusts the first data voltage to a second data voltage, and the The source driving circuit then adjusts the second data voltage to a third data voltage. The first data voltage, the second data voltage and the third data voltage are different from each other; and the pixel circuits receive the third data voltage. The data voltage and the second reference voltage are used, and the driving current flowing through the light emitting diode is controlled according to the third data voltage and the second reference voltage. The driving method of claim 1, wherein there is a reference voltage difference between the first reference voltage and the second reference voltage, and there is a data voltage difference between the first data voltage and the second data voltage, The data voltage difference is between the second data voltage and the third data voltage. According to the driving method of claim 1, wherein when the first reference voltage is greater than the second reference voltage, the first data voltage is less than the second data voltage, and the second data voltage is less than the third data voltage. According to the driving method of claim 3, when the first reference voltage is less than the second reference voltage, the first data voltage is greater than the second data voltage, and the second data voltage is greater than the third data voltage. A driving method suitable for a display device, wherein the display device includes a source driving circuit, a gate driving circuit, and a plurality of pixel circuits. The driving method includes: the pixel circuits receive the source driving circuit Output a data voltage and a reference voltage output by a power supply circuit; in one of the M periods, the source drive circuit adjusts the data voltage N times; and the pixel circuits receive the data voltage And the reference voltage, and control a driving current flowing through a light emitting diode according to the data voltage and the reference voltage. The driving method according to claim 5, wherein in the M time periods, the source driving circuit adjusts the data voltage M*N times. The driving method according to claim 5, wherein the electric Each time the source supply circuit adjusts the reference voltage, the adjusted reference voltage has a reference voltage difference from the reference voltage before adjustment; each time the source drive circuit adjusts the data voltage, the adjusted data voltage There is a data voltage difference from the data voltage before adjustment. The driving method according to claim 7, wherein when the reference voltage difference is a negative value, the data voltage difference is a positive value; when the reference voltage difference is a positive value, the data voltage difference is a negative value . The driving method according to claim 5, wherein the time length of one of the M time periods is 5-15 milliseconds, and the total time length of the M time periods is 30-80 milliseconds. A driving method suitable for a display device, wherein the display device includes a source driving circuit, a gate driving circuit, and a plurality of pixel circuits. The driving method includes: the pixel circuits receive the source driving circuit Output a data voltage and a first reference voltage output by a power supply circuit, and control a driving current flowing through a light emitting diode according to the first reference voltage; in a period of time, the power supply circuit The first reference voltage is adjusted to a second reference voltage; and the pixel circuits receive the data voltage and the second reference voltage, and control the flow through the transmitter according to the data voltage and the second reference voltage The driving current of the photodiode; wherein, there is a reference voltage difference between the first reference voltage and the second reference voltage. The driving method according to claim 10, wherein the first reference voltage is greater than the second reference voltage. The driving method according to claim 10, wherein the first reference voltage is less than the second reference voltage. A driving method suitable for a display device, wherein the display device includes a source driving circuit, a gate driving circuit, and a plurality of pixel circuits. The driving method includes: the pixel circuits receive the source driving circuit Output a first data voltage and a reference voltage output by a power supply circuit, and control a driving current flowing through a light-emitting diode according to the first data voltage; in a period of time, the source driving circuit will The first data voltage is adjusted to a second data voltage, and the source driving circuit then adjusts the second data voltage to a third data voltage, the first data voltage, the second data voltage and the third data Voltages are different from each other; and the pixel circuits receive the third data voltage and the reference voltage, and control the driving current flowing through the light emitting diode according to the third data voltage and the reference voltage; Wherein, there is a data voltage difference between the first data voltage and the second data voltage, and there is the data voltage difference between the second data voltage and the third data voltage. The driving method according to claim 13, wherein the first data voltage is greater than the second data voltage, and the second data voltage is greater than the third data voltage. The driving method according to claim 13, wherein the first data voltage is less than the second data voltage, and the second data voltage is less than the third data voltage.

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