TWI463462B - Oled driving circuit and method of the same used in display panel - Google Patents

Description

Organic light emitting diode driving circuit of display panel and method thereof

The present disclosure relates to a display technology, and more particularly to an organic light emitting diode driving circuit for a display panel and a method thereof.

Organic Light-Emitting Diode (OLED) refers to a technique in which an organic semiconductor material and a luminescent material are driven by current to achieve luminescence and display. Compared with liquid crystal display technology, organic light-emitting diodes are light, thin, high in brightness, large in viewing angle, no need for backlight, low power consumption, fast response, high definition, low heat generation, and seismic performance. Excellent, low manufacturing cost, and flexible. Therefore, in recent years, display panels based on the development of organic light-emitting diodes have become a hot research direction of display technology.

After long-term operation, the organic light-emitting diode will easily cause the effect of material degradation, resulting in variation of its own threshold voltage. When the threshold voltage is mutated, the luminance of the organic light-emitting diode may be attenuated without changing the driving mode.

Therefore, how to design an organic light-emitting diode driving circuit of a display panel and a method thereof to avoid the shortage of luminance caused by the threshold voltage variation of the organic light-emitting diode is an urgent problem to be solved in the industry.

Therefore, one aspect of the disclosure is to provide an organic light emitting diode driving circuit for driving an organic light emitting diode, wherein the organic light emitting diode driving circuit comprises: a switching transistor, a storage capacitor, a driving transistor, and Control module. The switching transistor includes: a first switching source/drain, a second switching source/drain, and a switching gate. The first switching source/drain receives the data signal. The switch gate receives the scan signal. The storage capacitor has a first end and a second end. The driving transistor includes a first driving source/drain, a driving gate, and a second driving source/drain for connecting to the organic light emitting diode. The control module includes: a charging switch, a memory switch and three lighting switches. The charging switch is connected between the first end of the storage capacitor and the first voltage end. The memory switch is connected between the first end of the storage capacitor and the second driving source/drain. The three light-emitting switches are respectively connected between the first end of the storage capacitor and the driving gate, the first voltage end and the first driving source/drain, and the second end of the storage capacitor and the second driving source/汲Extremely. During the charging time, the charging switch is turned on, the three lighting switches and the memory switch are turned off, and the scanning signal turns on the switching transistor to transmit the data signal from the first switching source/drain to the second switching source/drain. During the memory time after the charging time, the memory switch is turned on, the three light-emitting switches and the charging switch are turned off, and the scanning signal turns on the switching transistor to transmit the data signal from the first switching source/drain to the second switching source/drain . During the lighting time after the memory time, the three lighting switches are turned on, the memory switch and the charging switch are turned off, and the scanning signal stops the switching transistor from being turned on.

According to an embodiment of the present disclosure, the charging on relationship is turned on or off according to the charging switch control signal, and the three lighting on relationship is turned on or off according to the illumination switch control signal, and the memory on relationship is turned on or off according to the memory switch control signal. The charging switch, the three lighting switches and the memory switch are respectively transistors, so as to receive the charging switch control signal, the light switch control signal or the memory switch control signal through the gate.

According to another embodiment of the present disclosure, the first switching source/drain is connected to the data line to receive the data signal from the data line. The switch gate is connected to the gate line to receive the scan signal from the gate line.

According to still another embodiment of the present disclosure, the storage capacitor is charged according to a voltage difference between the first voltage terminal and the data signal during the charging time, and the storage capacitor discharges the organic light emitting diode during the memory time, and During the illuminating time, the driving transistor is turned on according to the voltage across the storage capacitor, and the driving current is supplied from the first voltage terminal to the organic light emitting diode.

According to still another embodiment of the present disclosure, an anode of the organic light emitting diode is connected to the second driving source/drain, and a cathode of the organic light emitting diode is connected to the second voltage end. The second potential of the second voltage terminal is less than the first potential of the first voltage terminal.

Another aspect of the present disclosure is to provide a display panel comprising: a data driving module, a gate driving module, and a pixel array. The data drive module includes a plurality of data lines. The gate drive module includes a plurality of gate lines. The pixel array includes a plurality of pixel units, wherein the pixel units respectively include: an organic light emitting diode and an organic light emitting diode driving circuit. The organic light emitting diode driving circuit comprises: a switching transistor, a storage capacitor, a driving transistor and a control module. The switching transistor includes: a first switching source/drain, a second switching source/drain, and a switching gate. The first switching source/drain receives the data signal. The switch gate receives the scan signal. The storage capacitor has a first end and a second end. The driving transistor includes a first driving source/drain, a driving gate, and a second driving source/drain for connecting to the organic light emitting diode. The control module includes: a charging switch, a memory switch and three lighting switches. The charging switch is connected between the first end of the storage capacitor and the first voltage end. The memory switch is connected between the first end of the storage capacitor and the second driving source/drain. The three light-emitting switches are respectively connected between the first end of the storage capacitor and the driving gate, the first voltage end and the first driving source/drain, and the second end of the storage capacitor and the second driving source/汲Extremely. During the charging time, the charging switch is turned on, the three lighting switches and the memory switch are turned off, and the scanning signal turns on the switching transistor to transmit the data signal from the first switching source/drain to the second switching source/drain. During the memory time after the charging time, the memory switch is turned on, the three light-emitting switches and the charging switch are turned off, and the scanning signal turns on the switching transistor to transmit the data signal from the first switching source/drain to the second switching source/drain . During the lighting time after the memory time, the three lighting switches are turned on, the memory switch and the charging switch are turned off, and the scanning signal stops the switching transistor from being turned on.

According to an embodiment of the present disclosure, the charging on relationship is turned on or off according to the charging switch control signal, and the three lighting on relationship is turned on or off according to the illumination switch control signal, and the memory on relationship is turned on or off according to the memory switch control signal. The charging switch, the three lighting switches and the memory switch are respectively transistors, so as to receive the charging switch control signal, the light switch control signal or the memory switch control signal through the gate.

According to another embodiment of the present disclosure, the storage capacitor is charged according to a voltage difference between the first voltage terminal and the data signal during the charging time, and the storage capacitor discharges the organic light emitting diode during the memory time, and During the illuminating time, the driving transistor is turned on according to the voltage across the storage capacitor, and the driving current is supplied from the first voltage terminal to the organic light emitting diode.

According to still another embodiment of the present disclosure, an anode of the organic light emitting diode is connected to the second driving source/drain, and a cathode of the organic light emitting diode is connected to the second voltage end. The second potential of the second voltage terminal is less than the first potential of the first voltage terminal.

A further aspect of the present disclosure is to provide an organic light emitting diode driving method for driving an organic light emitting diode. The organic light emitting diode driving method includes: providing an organic light emitting diode driving circuit, wherein the organic light emitting The diode driving circuit comprises a switching transistor, a driving transistor, a storage capacitor and a control module, wherein the storage capacitor is connected to the switching transistor, and the second driving source/drain of the driving transistor is connected to the organic light emitting diode; During the charging time, the switching transistor is turned on to receive the data signal and transmitted to the storage capacitor, and the control module controls the storage capacitor to be connected to the first voltage terminal; during the memory time after the charging time, the switching transistor is turned on to receive the data signal. And transmitting to the storage capacitor and the control module controlling the storage capacitor to be connected to the organic light emitting diode; and turning off the switching transistor and controlling the storage capacitor of the control module to be connected to the driving gate of the driving transistor during the lighting time after the memory time a pole and a second driving source/drain, and a first driving source/drain connection for controlling the driving transistor A first voltage terminal.

According to an embodiment of the present disclosure, the charging capacitor further includes: the storage capacitor is charged according to a voltage difference between the first voltage terminal and the data signal. In the memory time, the storage capacitor further discharges the organic light emitting diode. In the illuminating time, the driving transistor is turned on according to the voltage across the storage capacitor, and the driving current is supplied from the first voltage terminal to the organic light emitting diode.

The advantage of applying the disclosure is that the storage capacitor senses the threshold voltage of the organic light-emitting diode during the memory time by the control of the control module, so as to dynamically adjust the driving current in the light-emitting time to compensate the organic light. The threshold voltage of the diode is varied to avoid the reduction of the luminance of the light, and the above purpose is easily achieved.

Please refer to both Figure 1 and Figure 2. 1 is a block diagram of a display panel 1 in an embodiment of the present disclosure. FIG. 2 is a circuit diagram of a pixel unit 2 in an embodiment of the disclosure.

The display panel 1 includes a data driving module 10, a gate driving module 12, and a pixel array 14. The data driving module 10 includes a data driving circuit 100 and a data line 102. The gate drive module 12 includes a gate drive circuit 120 and a gate line 122. The pixel array 14 includes a plurality of pixel units 2 as shown in FIG.

The pixel unit 2 includes an organic light emitting diode driving circuit 20 and an organic light emitting diode 22. The organic light emitting diode driving circuit 20 includes a switching transistor 200, a storage capacitor 202, a driving transistor 204, and a control module.

The switching transistor 200 includes: a first switching source/drain for receiving the data signal Vdata, a second switching source/drain, and a switching gate for receiving the scanning signal Vscan. In one embodiment, the first switching source/drain is connected to the data line 102 depicted in FIG. 1. The data signal Vdata is generated according to the data driving circuit 100 and transmitted to the first switching source through the data line 102. / bungee jumping. The switch gate is connected to the gate line 122 depicted in FIG. 1. The scan signal Vscan is generated according to the gate drive circuit 120 and transmitted to the switch gate through the gate line 122. In one embodiment, the data driving circuit 100 and the gate driving circuit 120 can generate an appropriate data signal Vdata and a scanning signal Vscan by a timing control module (not shown).

The storage capacitor 202 has a first end and a second end. The second end of the storage capacitor 202 is connected to the second switching source/drain of the switching transistor 200. The driving transistor 204 includes a first driving source/drain, a driving gate, and a second driving source/drain for connecting to the organic light-emitting diode 22.

In one embodiment, the switching transistor 200 and the driving transistor 204 described above may be formed by a thin film transistor process.

The control module includes a charging switch 206, a memory switch 208, and three lighting switches 210, 212, and 214. The charging switch 206 is connected between the first end of the storage capacitor 202 and the first voltage terminal VDD. The memory switch 208 is connected between the first end of the storage capacitor 202 and the second driving source/drain of the driving transistor 204. The light-emitting switch 210 is connected between the first voltage terminal VDD and the first driving source/drain of the driving transistor 204, and the light-emitting switch 212 is connected between the first end of the storage capacitor 202 and the driving gate of the driving transistor 204. 214 is connected between the second end of the storage capacitor 202 and the second driving source/drain of the driving transistor 204.

In one embodiment, the charging switch 206, the memory switch 208, and the three lighting switches 210, 212, and 214 may each be a transistor. In one embodiment, the charging switch 206, the memory switch 208, and the three lighting switches 210, 212, and 214 can be formed by a thin film transistor process such as the switching transistor 200 and the driving transistor 204.

Therefore, in an embodiment, the gate of the charging switch 206 can receive the charging switch control signal Va and is turned on or off accordingly. The gate of the memory switch 208 can receive the memory switch control signal Vb and is turned on or off accordingly. The gates of the light-emitting switches 210, 212, and 214 can receive the light-emitting switch control signal Vc and are turned on or off accordingly.

The anode of the organic light emitting diode 22 is connected to the second driving source/drain of the driving transistor 204, and the cathode is connected to the second voltage terminal VSS. In an embodiment, the second potential of the second voltage terminal VSS is smaller than the first potential of the first voltage terminal VDD.

Please also refer to Figure 3. FIG. 3 is a timing waveform diagram of the scan signal Vscan, the charge switch control signal Va, the memory switch control signal Vb, and the light switch control signal Vc in an embodiment of the disclosure.

During the charging time, the charging switch control signal Va turns on the charging switch 206, the memory switch control signal Vb turns off the memory switch 208, and the lighting switch control signal Vc also turns off the three lighting switches 210, 212 and 214. The scan signal Vscan will now turn on the switching transistor 200 to pass the data signal Vdata from the first switching source/drain to the second switching source/drain.

Therefore, please refer to FIG. 4A, which is an equivalent circuit diagram of the pixel unit 2 during the charging time according to an embodiment of the disclosure. The equivalent circuit diagram of the pixel unit 2 during the charging time is equivalent to connecting the first voltage terminal VDD and the data signal Vdata at both ends of the storage capacitor 202. Generally, the potential of the first voltage terminal VDD will be higher than the potential of the data signal Vdata. Therefore, according to the voltage difference between the first voltage terminal VDD and the data signal Vdata, the current will flow in the direction 40 from the first voltage terminal VDD into the storage capacitor 202 for charging. At this time, the crossover voltage Vcap of the storage capacitor 202 can be expressed by the following formula:

Vcap=VDD-Vdata (Equation 1)

Then, as shown in FIG. 3, during the memory time after the charging time, the memory switch control signal Vb turns on the memory switch 208, the charging switch control signal Va causes the charging switch 206 to be turned off, and the light switch control signal Vc also makes The three illuminated switches 210, 212 and 214 are closed. The scan signal Vscan will continue to turn on the switching transistor 200 to cause the data signal Vdata to be transferred from the first switching source/drain to the second switching source/drain.

Therefore, please refer to FIG. 4B, which is an equivalent circuit diagram of the pixel unit 2 in the memory time according to an embodiment of the disclosure. The equivalent circuit diagram of the pixel unit 2 during the memory time is equivalent to connecting the first end of the storage capacitor 202 to the organic light-emitting diode 22. Therefore, the current will be discharged in the direction 42 from the first end of the storage capacitor 202 through the organic light-emitting diode 22 to the second voltage terminal VSS. The discharge process continues until the voltage at the first end of the storage capacitor 202 is no longer sufficient to turn the organic light-emitting diode 22 on. That is, when the voltage at the first end of the storage capacitor 202 is equal to the threshold voltage Vth_o of the organic light-emitting diode 22, the storage capacitor 202 will no longer be discharged. At this time, the crossover voltage Vcap of the storage capacitor 202 can be expressed by the following formula:

Vcap=(Vth_o+VSS)-Vdata(Form 2)

Then, as shown in FIG. 3, the illumination switch control signal Vc turns on the three illumination switches 210, 212, and 214 during the illumination time after the memory time, and the charging switch control signal Va causes the charging switch 206 to be turned off and the memory is turned on. The switch control signal Vb also causes the memory switch 208 to be turned off. The scan signal Vscan now stops the switching transistor 202 from conducting.

Therefore, please refer to FIG. 4C, which is an equivalent circuit diagram of the pixel unit 2 in the illumination time in an embodiment of the disclosure. The equivalent circuit diagram of the pixel unit 2 during the illumination time is equivalent to connecting the storage capacitor 202 to the driving gate of the driving transistor 204 and the second driving source/drain, and the first driving source of the driving transistor 204/汲The pole is connected to the first voltage terminal VDD. Therefore, when the voltage across the storage capacitor 202 in the above Equation 2 is greater than the threshold voltage Vth_tft of the driving transistor 204, it can be used as the ON voltage Von for turning on the driving transistor 204. After the driving transistor 204 is turned on, the driving current I is supplied to the organic light emitting diode 22 according to the first voltage terminal VDD. At this time, the drive current I can be expressed by the following formula:

I=K(Von-Vth_tft) ² =K(Vcap-Vth_tft) ²

=K(((Vth_o+VSS)-Vdata)-Vth_tft) ² (Equation 3)

It can be known from Equation 3 that the driving current I generated after the driving transistor 204 is turned on will vary with the data signal Vdata and the threshold voltage Vth_o of the organic light-emitting diode 22. When the material of the organic light-emitting diode 22 is mutated and the threshold voltage Vth_o is increased, the driving current I is also changed to compensate for the luminance luminance attenuation effect caused by the variation of the threshold voltage Vth_o of the organic light-emitting diode 22.

Therefore, as can be seen from the above, the organic light emitting diode driving circuit 20 of the present disclosure can memorize the threshold voltage Vth_o of the organic light emitting diode 22 in the memory time, and drive the driving current I generated after the driving transistor 204 is turned on. The data signal Vdata and the threshold voltage Vth_o of the organic light-emitting diode 22 are changed to dynamically adjust the driving current I during the light-emitting time to compensate for variations in the threshold voltage of the organic light-emitting diode to avoid the effect of reducing the luminance of the light.

Please refer to Figure 5. FIG. 5 is a flow chart of an organic light emitting diode driving method 500 according to an embodiment of the disclosure. The organic light emitting diode driving method 500 can be applied to the organic light emitting diode driving circuit 20 as shown in FIG. The organic light-emitting diode driving method 500 includes the following steps (it should be understood that the steps mentioned in the embodiment can be adjusted according to actual needs, except for the order in which the order is specifically stated, or even simultaneously or Partially executed).

In step 501, an organic light emitting diode driving circuit 20 as shown in FIG. 2 is provided.

In step 502, during the charging time, the switching transistor 200 is turned on to receive the data signal Vdata and transmitted to the storage capacitor 202, and the control module controls the storage capacitor 202 to be connected to the first voltage terminal VDD. At this time, the storage capacitor 202 will be charged according to the voltage difference between the first voltage terminal VDD and the data signal Vdata.

In step 503, the switching transistor 200 is turned on to receive the data signal Vdata and transmitted to the storage capacitor 202 and the control module controls the storage capacitor 202 to be connected to the organic light emitting diode 22 during the memory time after the charging time. At this time, the storage capacitor 202 discharges the organic light-emitting diode 22.

In step 504, the switching transistor 200 is turned off during the illuminating time after the memory time, and the control module controls the storage capacitor 202 to be connected to the driving gate of the driving transistor 204 and the second driving source/drain, and to control the driving power. The first driving source/drain of the crystal 204 is connected to the first voltage terminal VDD. At this time, the driving gate of the driving transistor 204 and the second driving source/drain will be turned on according to the voltage across the storage capacitor 202, and the driving current is supplied to the organic light emitting diode 22 according to the first voltage terminal VDD.

Therefore, it can be seen from the above that the organic light emitting diode driving method of the present disclosure can dynamically adjust the driving current in the light emitting time to compensate for the variation of the threshold voltage of the organic light emitting diode to avoid the effect of reducing the luminance.

The present disclosure has been disclosed in the above embodiments, but it is not intended to limit the disclosure, and any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the disclosure. The scope of protection of the disclosure is subject to the definition of the scope of the patent application.

1. . . Display panel

10. . . Data drive module

100. . . Data drive circuit

102. . . Data line

12. . . Gate drive module

120. . . Gate drive circuit

122. . . Gate line

14. . . Pixel array

2. . . Pixel unit

20. . . Organic light emitting diode driving circuit

200. . . Switching transistor

202. . . Storage capacitor

204. . . Drive transistor

206. . . Charging switch

208. . . Memory switch

210, 212, 214. . . Illuminated switch

twenty two. . . Organic light-emitting diode

40, 42. . . direction

500. . . Organic light emitting diode driving method

501-504. . . step

The above and other objects, features, advantages and embodiments of the present disclosure will become more apparent and understood.

1 is a block diagram of a display panel in an embodiment of the disclosure;

2 is a circuit diagram of a pixel unit in an embodiment of the disclosure;

FIG. 3 is a timing waveform diagram of a scan signal, a charge switch control signal, a memory switch control signal, and an illumination switch control signal according to an embodiment of the disclosure;

4A is an equivalent circuit diagram of a pixel unit in a charging time according to an embodiment of the disclosure;

4B is an equivalent circuit diagram of a pixel unit in a memory time according to an embodiment of the disclosure;

4C is an equivalent circuit diagram of a pixel unit in a lighting time according to an embodiment of the disclosure;

FIG. 5 is a flow chart of a method for driving an organic light emitting diode according to an embodiment of the disclosure.

2. . . Pixel unit

20. . . Organic light emitting diode driving circuit

200. . . Switching transistor

202. . . Storage capacitor

204. . . Drive transistor

206. . . Charging switch

208. . . Memory switch

210, 212, 214. . . Illuminated switch

twenty two. . . Organic light-emitting diode

Claims (18)

An organic light emitting diode driving circuit for driving an organic light emitting diode, the organic light emitting diode driving circuit comprising: a switching transistor, comprising: a first switching source/drain for receiving a data a second switching source/drain; and a switching gate for receiving a scanning signal; a storage capacitor having a first end and a second end; and a driving transistor including a first driving source a drain gate, a driving gate, and a second driving source/drain for connecting to the organic light emitting diode: and a control module comprising: a charging switch connected to the first of the storage capacitor Between the first voltage terminal and the first voltage terminal; a memory switch connected between the first end of the storage capacitor and the second driving source/drain; and three light-emitting switches respectively connected to the first of the storage capacitors Between the terminal and the driving gate, between the first voltage terminal and the first driving source/drain, and between the second terminal connected to the storage capacitor and the second driving source/drain; The charging switch is turned on during the charging time, the three a light switch and the memory switch are turned off, the scan signal turns on the switch transistor to transmit the data signal from the first switch source/drain to the second switch source/drain; The memory switch is turned on during one of the charging time, the three light-emitting switches and the charging switch are turned off, and the scanning signal turns on the switch transistor to make the data signal from the first switching source/drain Transmitting to the second switching source/drain; and in one of the lighting time after the memory time, the three lighting switches are turned on, the memory switch and the charging switch are turned off, and the scanning signal stops the switching transistor from being turned on. The OLED driving circuit of claim 1, wherein the charging switch relationship is turned on or off according to a charging switch control signal, and the three illuminating relationship is turned on or off according to an illuminating switch control signal, and the memory opening relationship is The control signal is turned on or off according to a memory switch. The OLED driving circuit of claim 2, wherein the charging switch, the three illuminating switches, and the memory switch are respectively a transistor for receiving the charging switch control signal by a gate, and the illuminating The switch control signal or the memory switch control signal. The OLED driving circuit of claim 1, wherein the first switching source/drain is connected to a data line to receive the data signal from the data line. The OLED driving circuit of claim 1, wherein the switching gate is connected to a gate line to receive the scanning signal from the gate line. The OLED driving circuit of claim 1, wherein the storage capacitor is charged according to a voltage difference between the first voltage terminal and the data signal during the charging time, during the memory time, The storage capacitor discharges the organic light emitting diode, and during the light emitting time, the driving transistor is turned on according to one of the storage capacitors, and a driving current is supplied from the first voltage terminal to the organic light emitting diode body. The organic light emitting diode driving circuit of claim 1, wherein one of the organic light emitting diodes is anode connected to the second driving source/drain, and one of the organic light emitting diodes is connected to a second Voltage terminal. The organic light emitting diode driving circuit of claim 7, wherein a second potential of the second voltage terminal is less than a first potential of the first voltage terminal. A display panel comprising: a data driving module comprising a plurality of data lines; a gate driving module comprising a plurality of gate lines; a pixel array comprising a plurality of pixel units, wherein the pixel units respectively comprise: An organic light emitting diode; and an organic light emitting diode driving circuit comprising: a switching transistor, comprising: a first switching source/drain for receiving a data signal from one of the data lines; a second switching source/drain; and a switching gate for one of the gate lines Receiving a scan signal; a storage capacitor having a first end and a second end; a driving transistor comprising a first driving source/drain, a driving gate, and a connection to the organic light emitting diode a second driving source/drain: and a control module, comprising: a charging switch connected between the first end of the storage capacitor and a first voltage end; a memory switch connected to the storage capacitor The first end and the second driving source/drain; and three light-emitting switches are respectively connected between the first end of the storage capacitor and the driving gate, connected to the first voltage end, and the first a driving source/drain and a second terminal connected to the storage capacitor and the second driving source/drain; wherein the charging switch is turned on during a charging time, the three lighting switches and the memory switch are turned off The scan signal turns on the switch transistor to enable the The data signal is transmitted from the first switching source/drain to the second switching source/drain; during one of the charging time, the memory switch is turned on, the three lighting switches and the charging switch are turned off, Scanning signal makes the opening Turning off the transistor to enable the data signal to be transmitted from the first switching source/drain to the second switching source/drain; and in one of the illumination time after the memory time, the three lighting switches are turned on, the memory The switch and the charging switch are turned off, and the scanning signal stops the switching transistor from being turned on. The display panel of claim 9, wherein the charging and switching relationship is turned on or off according to a charging switch control signal, wherein the three lighting on/off relationships are turned on or off according to an illumination switch control signal, and the memory on relationship is controlled according to a memory switch. The signal is turned on or off. The display panel of claim 10, wherein the charging switch, the three lighting switches, and the memory switch are respectively a transistor for receiving the charging switch control signal, the lighting switch control signal or the gate by a gate Memory switch control signal. The display panel of claim 9, wherein the storage capacitor is charged according to a voltage difference between the first voltage terminal and the data signal during the charging time, during the memory time, the storage capacitor is The organic light emitting diode discharges, and during the light emitting time, the driving transistor is turned on according to one of the storage capacitors, and a driving current is supplied from the first voltage terminal to the organic light emitting diode. The display panel of claim 9, wherein one of the organic light emitting diodes is anode-connected to the second driving source/drain, the organic light emitting diode One of the cathodes is connected to a second voltage terminal. The display panel of claim 13, wherein the second potential of the second voltage terminal is less than a first potential of the first voltage terminal. An organic light emitting diode driving method for driving an organic light emitting diode, the organic light emitting diode driving method comprising: providing an organic light emitting diode driving circuit, wherein the organic light emitting diode driving circuit comprises a a switching transistor, a driving transistor, a storage capacitor, and a control module, wherein the storage capacitor is connected to the switching transistor, and a second driving source/drain of the driving transistor is connected to the organic light emitting diode During a charging time, the switching transistor is turned on to receive a data signal and transmitted to the storage capacitor, and the control module controls the storage capacitor to be connected to a first voltage terminal; one of the memory times after the charging time Internally, the switch transistor is turned on to receive the data signal and transmitted to the storage capacitor, and the control module controls the storage capacitor to be connected to the organic light emitting diode; and in one of the illumination time after the memory time, The switching transistor is turned off and the control module controls the storage capacitor to be connected to one of the driving transistor and the second driving source/ Electrode, and controlling the first drive source drives one transistor / drain terminal connected to the first voltage. The method of driving an organic light emitting diode according to claim 15, wherein the charging time further comprises: The storage capacitor is charged according to a voltage difference between the first voltage terminal and the data signal. The organic light emitting diode driving method of claim 15, wherein the memory capacitor further comprises: the storage capacitor discharging the organic light emitting diode. The OLED driving method of claim 15, wherein the illuminating time further comprises: the driving transistor is turned on according to one of the storage capacitors, and a driving current is supplied from the first voltage terminal to The organic light emitting diode.