TWI676979B - Display panel and testing method of display panel - Google Patents

Abstract

A display panel includes a plurality of pixels. Each of the pixels includes a compensation circuit, a driving transistor, and a detection circuit. The compensation circuit includes a first node for providing a driving signal. The driving transistor is used for receiving the high voltage of the system, receiving a driving signal from the first node, and outputting a driving current to the light emitting element according to the driving signal. The detection circuit is used to provide a detection signal to the compensation circuit. When the compensation circuit receives the detection signal, the compensation circuit outputs the detection signal as a driving signal. When the compensation circuit receives the data signal, the compensation circuit generates a driving signal according to the data signal, wherein the data voltage level of the driving signal is negatively related to the absolute value of the threshold voltage of the driving transistor.

Description

Display panel and display panel detection method

The present disclosure relates to a display panel and a detection method, and particularly to a display panel with a detection function and a detection method thereof.

In recent years, with the development of display technology, display panels have been applied to various electronic devices, such as smart phones, tablet computers, or various screens.

Since it is necessary to provide multiple signals to compensate for the normal operation or detection of the circuit, the peripheral area of the display panel needs to be occupied, limiting the number of surface accesses and increasing the cost.

One aspect of the present disclosure relates to a display panel. The display panel contains a plurality of pixels. Each of the pixels includes a compensation circuit, a driving transistor, and a detection circuit. The compensation circuit includes a first node for providing a driving signal. The driving transistor is used for receiving the high voltage of the system, receiving a driving signal from the first node, and outputting a driving current to the light emitting element according to the driving signal. The detection circuit is used to provide a detection signal to the compensation circuit. When the compensation circuit receives the detection signal, the compensation circuit The compensation circuit outputs the detection signal as a driving signal. When the compensation circuit receives the data signal, the compensation circuit generates a driving signal according to the data signal, wherein the data voltage level of the driving signal is negatively related to the absolute value of the threshold voltage of the driving transistor.

Another aspect of the present disclosure relates to a method for detecting a display panel, including: turning on a plurality of detection circuits in a plurality of pixels according to a detection control signal; each of the detection circuits providing a detection signal to a corresponding compensation circuit in the pixel ; If the compensation circuit receives the detection signal, it uses the compensation circuit to output the detection signal as a driving signal to the corresponding driving transistor in the pixel; if the compensation circuit receives the data signal, it uses the compensation circuit to generate a driving signal based on the data signal, where the driving The data voltage level of the signal is negatively related to the absolute value of the threshold voltage of the driving transistor; and the driving transistor is used to output the driving current to the corresponding light-emitting element in the pixel according to the driving signal.

100, 100a, 100b ‧‧‧ pixels

120‧‧‧write circuit

140‧‧‧Light-emitting element

160‧‧‧Compensation circuit

180‧‧‧ Detection circuit

Td‧‧‧Drive Transistor

Tct‧‧‧ Detection Transistor

T1, T2, T3, T4, T5, T6, T7‧‧‧Transistors

Cst‧‧‧Capacitor

N1‧‧‧node

Vg‧‧‧Drive signal

I1‧‧‧Drive current

V _DATA ‧‧‧ data signal

V _REF ‧‧‧ Reference Voltage Level

CT, CTr, CTg, CTb ‧‧‧ detection signals

S1 [N], S1 [N + 1], S2‧‧‧scan control signal

CS‧‧‧ Detection control signal

EM‧‧‧light control signal

OVDD‧‧‧System high voltage

OVSS‧‧‧System Low Voltage

During P _test and P _normal ‧‧‧

Pr, Pg, Pb ‧‧‧ color pixels

L _dr , L _dg , L _db ‧‧‧ detection signal line

L _cs ‧‧‧ Detection control signal line

900‧‧‧ display panel detection method

S910 ~ S970‧‧‧ Operation

FIG. 1 is a schematic diagram of a pixel in a display panel according to some embodiments of the present disclosure; FIG. 2 is a detailed schematic diagram of a pixel according to some embodiments of the present disclosure; FIG. 3 is a Signal timing diagrams of the pixels in Figure 2 shown in some embodiments according to this disclosure; Figures 4A and 4B are schematic diagrams of states of transistors in pixels in Figure 2 according to some embodiments of this disclosure. Figure 5 is another drawing shown in accordance with other embodiments of the present disclosure Figure 6 is a detailed schematic diagram of a pixel; Figure 6 is a timing diagram of the pixel of Figure 5 according to some embodiments of the present disclosure; Figure 7 is a diagram of Figure 5 according to some embodiments of the present disclosure. A schematic diagram of the states of the transistors in the pixel; FIG. 8 is a schematic diagram of a display panel according to some embodiments of the present disclosure; and FIG. 9 is a display panel according to some embodiments of the present disclosure. Flow chart of the detection method.

The following is a detailed description with examples and the accompanying drawings, but the examples provided are not intended to limit the scope covered by this disclosure, and the description of the structure operation is not intended to limit the order of its execution, and any recombination of components The structure of the device and the device with the same effect are all covered by the present disclosure. In addition, the drawings are for illustrative purposes only, and are not drawn to the original dimensions. In order to facilitate understanding, the same elements or similar elements in the following description will be described with the same symbols.

The terms used throughout the specification and the scope of patent applications, unless otherwise specified, usually have the ordinary meaning of each term used in this field, in the content disclosed herein, and in special content.

Regarding the "first", "second", "third", etc. used in this article, they do not specifically refer to the order or order, nor are they used to limit the present disclosure. They are only used to distinguish the same technology. Term or element Already.

In addition, as used in this document, "coupling" or "connection" can mean that two or more components make direct physical or electrical contact with each other, or indirectly make physical or electrical contact with each other. Multiple elements operate or act on each other.

Please refer to Figure 1. FIG. 1 is a schematic diagram of a pixel 100 in a display panel according to some embodiments of the present disclosure. As shown in FIG. 1, the pixel 100 includes a writing circuit 120, a compensation circuit 160, a detection circuit 180, a driving transistor Td, and a light emitting element 140.

Structurally, the write circuit 120 is coupled to the compensation circuit 160. The detection circuit 180 is coupled to the compensation circuit 160. The compensation circuit 160 is coupled to the driving transistor Td. The light emitting element 140 is coupled to the driving transistor Td. Specifically, the compensation circuit 160 is coupled to the control terminal and the second terminal of the driving transistor Td.

In operation, the write circuit 120 is used to receive the data signal V _DATA and provide the data signal V _DATA to the compensation circuit 160. The detection circuit 180 is configured to receive the detection signal CT and provide the detection signal CT to the compensation circuit 160. The compensation circuit 160 is configured to receive a data signal V _DATA or a detection signal CT, and provide a driving signal Vg to the driving transistor Td. The driving transistor Td is used to receive the system high voltage OVDD and the driving signal Vg, and output the driving current I1 to the light emitting element 140 according to the driving signal Vg.

Specifically, when the compensation circuit 160 receives the detection signal CT, the compensation circuit 160 outputs the detection signal CT as the driving signal Vg. When the compensation circuit 160 receives the data signal V _DATA , the compensation circuit 160 generates a driving signal Vg according to the data signal V _DATA . The data voltage level of the driving signal Vg is negatively related to the absolute value of the threshold voltage of the driving transistor Td.

Please refer to Figure 2. FIG. 2 is a detailed schematic diagram of a pixel 100a according to some embodiments of the present disclosure. As shown in FIG. 2, the writing circuit 120 in the pixel 100 a includes a transistor T1 and a transistor T2. The compensation circuit 160 in the pixel 100a includes a capacitor Cst, a transistor T3, a transistor T4, a transistor T5, a transistor T6, and a transistor T7. The detection circuit 180 in the pixel 100a includes a detection transistor Tct.

Structurally, the second terminal of the transistor T1 and the first terminal of the transistor T2 are coupled to the first terminal of the capacitor Cst. The second terminal of the capacitor Cst is coupled to the control terminal of the driving transistor Td and the second terminal of the transistor T3 through the first node N1. The second terminal of the detection transistor Tct is coupled to the first node N1. The first terminal of transistor T3 and the first terminal of transistor T4 are both coupled to the second terminal of transistor T7. The second terminal of the transistor T4 is coupled to the first terminal of the transistor T5 and the second terminal of the driving transistor Td. The second terminal of the transistor T5 and the second terminal of the transistor T6 are coupled to the first terminal of the light emitting element 140. A first terminal of the transistor T6 is coupled to a control terminal of the transistor T6.

In operation, the transistor T1 is used to selectively turn on according to the light-emitting control signal EM to output the reference voltage level V _REF . Specifically, the first terminal of the transistor T1 is used to receive the reference voltage level V _REF . The control terminal of the transistor T1 is used to receive the light-emitting control signal EM. The second terminal of the transistor T1 is used to output a reference voltage level V _REF .

The transistor T2 is used to selectively turn on according to the scan control signal S2 to output a data signal V _DATA . Specifically, the first end of the transistor T2 is used to receive a data signal V _DATA . The control terminal of the transistor T2 is used to receive the scanning control signal S2. The second terminal of the transistor T2 is used to output a data signal V _DATA .

Transistor T3 is used to selectively turn on according to the scan control signal S2. Specifically, the first terminal of the transistor T3 is used to receive the reference voltage level V _REF or the detection signal CT through the detection transistor Tct. The control terminal of the transistor T3 is used to receive the scanning control signal S2.

Transistor T4 is used to selectively turn on according to the scan control signal S2. Specifically, the first terminal of the transistor T4 is used to receive the reference voltage level V _REF or the detection signal CT through the detection transistor Tct. The control terminal of the transistor T4 is used to receive the scanning control signal S2.

The transistor T5 is used for selectively conducting the light-emitting control signal EM received by the control terminal of the transistor T5 to output the driving current I1. Transistor T6 is used to selectively turn on according to the scan control signal S1 [N + 1] received by the first end of transistor T6.

Transistor T7 is used to selectively turn on for compensation according to the scanning control signal S1 [N]. Specifically, the first terminal of the transistor T7 is used to receive the reference voltage level V _REF . The control terminal of the transistor T7 is used to receive the scanning control signal S1 [N]. The second terminal of the transistor T7 is used to output the reference voltage level V _REF to the first terminal of the transistor T3 and the first terminal of the transistor T4.

The detection transistor Tct is used to selectively conduct the detection according to the detection control signal CS. The first terminal of the detection transistor Tct is used to receive a reference voltage level V _REF . The control terminal of the detection transistor Tct is used to receive a detection control signal CS. The second terminal of the detection transistor Tct is used to output a detection control signal CS to the first node N1.

The driving transistor Td is used to receive the system high voltage OVDD and the driving signal Vg, and output the driving current I1 to the light emitting element 140 according to the driving signal Vg. The first terminal of the driving transistor Td is used to receive the system high voltage OVDD. drive The control terminal of the power transistor Td is used to receive a driving signal Vg from the first node N1. The second terminal of the driving transistor Td is used to output a driving current I1 to the light emitting element 140 according to the driving signal Vg.

For the convenience of description, the specific operations of each element in the pixel 100a will be described in conjunction with the drawings in the following paragraphs. Please refer to Figure 3 and Figures 4A and 4B together. FIG. 3 is a schematic timing diagram of the signal of the pixel 100a in FIG. 2 according to some embodiments of the present disclosure. Figures 4A and 4B are schematic diagrams showing the states of the transistors in the pixel 100a of Figure 2 according to some embodiments of the present disclosure.

In some embodiments, as shown in FIG. 3, during the test period P _test , the scan control signals S1 [N], S2 [N], and S1 [N + 1] are at a high voltage level. The light emission control signal EM is at a low voltage level. The detection control signal CS is turned to a low voltage level for detection. During this period, as shown in Figure 4A, the transistors T2, T3, T4, T6, and T7 are turned off according to the scan control signals S1 [N], S2 [N], and S1 [N + 1] of the high voltage level. Off. The transistors T1 and T5 are turned on according to the light-emitting control signal EM at a low voltage level. The detection transistor Tct is turned on according to the detection control signal CS of the low voltage level.

In other words, during the test period P _test , the detection transistor Tct in the detection circuit 180 is turned on according to the detection control signal CS, receives the detection signal CT, and outputs the detection signal CT to the first node N1 as the driving signal Vg. The driving transistor Td outputs a driving current I1 to the light emitting element 140 according to the driving signal Vg, so as to light up the light emitting element 140 for detection.

Next, during the normal display period P _normal , as shown in FIG. 3, the scan control signals S1 [N], S2 [N], S1 [N + 1] and the light emission control signal EM are sequentially operated to perform the data signal V _DATA . Write and compensate. The detection control signal CS is at a high voltage level so that the detection transistor Tct remains off.

Specifically, the control terminal of the transistor T7 receives the scanning control signal S1 [N] at a low voltage level, so that the transistor T7 is turned on. The scan control signal S2 [N] of the low voltage level turns on the transistors T3 and T4, so that the control terminal of the driving transistor Td is reset to the reference voltage level V _REF . Then, the scan control signal S2 [N] at the low voltage level turns on the transistor T2, and the data signal V _{DATA is} written into the first terminal of the capacitor Cst through the transistor T2. At the same time, the system high voltage OVDD charges the control terminal of the driving transistor Td through the transistors T3 and T4 until the voltage difference between the first terminal and the control terminal of the driving transistor Td is OVDD- | Vth |, where | Vth | The critical voltage of the crystal Td.

After that, the scan control signal S1 [N + 1] of the low voltage level resets the anode voltage level of the light emitting element OLED. The low-level light-emitting control signal EM turns on the crystals T1 and T5. The first terminal of the capacitor Cst receives the reference voltage level V _REF through the transistor T1. Therefore, the voltage level of the second terminal of the capacitor Cst is changed from OVDD- | Vth | to OVDD- | Vth | -V _DATA + V _REF . In this way, the driving current I1 is as follows: I1 = k (V _SG- | Vth |) ² = k [0VDD- (0VDD- | Vth | -V _DATA + V _REF )-| Vth |] ² = k (V _DATA -V _REF ) ²

In addition, as shown in FIG. 4B, during the normal display period P _normal , the detection transistor Tct in the detection circuit 180 is kept off according to the detection control signal CS, so that the driving signal Vg and the input signal of the detection circuit 180 (for example: detection Signal CT, constant voltage signal or ground signal, etc.) are independent of each other.

Please refer to Figure 5. FIG. 5 is a detailed schematic diagram of another pixel 100b according to other embodiments of the present disclosure. In the embodiment shown in FIG. 5, components similar to those in the embodiment shown in FIG. 2 are represented by the same component symbols, and their operations have been described in the previous paragraph, and will not be repeated here. Compared with the embodiment shown in FIG. 2, in this embodiment, during the test period P _test , the transistor T7 in the compensation circuit 160 is used as the detection circuit 180 for detection.

Specifically, during the normal display period P _normal , the transistor T7 is used to selectively turn on according to the scan control signal S1 [N] for compensation. During the test period P _test , the transistor T7 is used to selectively conduct conduction according to the detection control signal CS for detection.

For the convenience of description, the specific operations of each element in the pixel 100b will be described in conjunction with the drawings in the following paragraphs. Please refer to Figure 6 and Figure 7 together. FIG. 6 is a schematic timing diagram of signals of the pixel 100b of FIG. 5 according to some embodiments of the present disclosure. FIG. 7 is a schematic diagram showing states of the transistors in the pixel 100b of FIG. 5 according to some embodiments of the present disclosure.

The embodiment shown in FIG. 6 is similar to the embodiment shown in FIG. 3 and is divided into a detection period P _test and a normal display period P _normal . The operation of P _normal during the _normal display has been described in the previous paragraph, and is not repeated here. During the test period P _test , the scan control signals S1 [N], S2 [N] and the light emission control signal EM are sequentially turned to a low voltage level, and the scan control signal S1 [N] is used as a detection control signal CS by a high voltage level Turn to low voltage levels respectively.

Specifically, as shown in FIG. 7, during the test period P _test , the scan control signal S1 [N] turned to a low voltage level is used as the detection control signal CS, so that the transistor T7 is turned on to receive the detection signal CT. The scan control signal S2 [N] of the low voltage level causes the transistor T3 to be turned on to transmit the detection signal CT to the control terminal of the driving transistor Td. The low-voltage light-emitting control signal EM causes the transistor T5 to be turned on for detection.

In addition, during the test period P _test , the reference voltage level V _REF is the detection signal CT. In other words, the voltage level of the reference voltage level V _{REF is} the voltage level to be given to the control terminal of the driving transistor Td. The voltage level of the data signal V _DATA can be any fixed DC voltage value.

In this way, during the test period P _test , the transistor T7 in the detection circuit 180 is turned on according to the detection control signal CS, receives the detection signal CT and outputs the detection signal CT to the first node N1 as the driving signal Vg. The driving transistor Td outputs a driving current I1 to the light emitting element 140 according to the driving signal Vg, so as to light up the light emitting element 140 for detection.

Please refer to Figure 8. FIG. 8 is a schematic diagram of a display panel according to some embodiments of the present disclosure. As shown in FIG. 8, the display panel includes first color pixels Pr [1,1] ~ Pr [n, n], second color pixels Pg [1,1] ~ Pg [n, n], and third color pixels Pb [1,1] ~ Pb [n, n].

In some embodiments, the pixels Pr [1,1] ~ Pr [n, n], Pg [1,1] ~ Pg [n, n], and Pb [1,1] ~ Pb [n, n] can be The pixel 100a in FIG. 2 is implemented. As shown in FIG. 8, the detection circuits 180 in the first color pixels Pr [1,1] to Pr [n, n] are coupled to each other. Specifically, the first ends of the detection transistors Tct of the respective detection circuits 180 in the first color pixels Pr [1,1] to Pr [n, n] are coupled to each other through the detection signal line L _dr . Similarly, the detection circuits 180 in the second color pixels Pg [1,1] ~ Pg [n, n] are coupled to each other through the detection signal line L _dg . The detection circuits 180 in the third color pixels Pb [1,1] ~ Pb [n, n] are coupled to each other through the detection signal line L _db .

In other embodiments, the pixels Pr [1,1] ~ Pr [n, n], Pg [1,1] ~ Pg [n, n], and Pb [1,1] ~ Pb [n, n] can be determined by The pixel 100b in FIG. 5 is implemented. Specifically, the first ends of the transistors T7 of the detection circuits 180 in the first color pixels Pr [1,1] to Pr [n, n] are coupled to each other through the detection signal line L _dr . For convenience of description, the following paragraphs will be described using the pixel 100a as an example.

In operation, each detection transistor Tct of the first color pixels Pr [1,1] ~ Pr [n, n] receives the first detection signal CTr through the detection signal line L _dr . Each detection transistor Tct of the second color pixels Pg [1,1] ~ Pg [n, n] receives the second detection signal CTg through the detection signal line L _dg . Each detection transistor Tct of the third color pixel Pb [1,1] ~ Pb [n, n] receives the third detection signal CTb through the detection signal line L _db . In some embodiments, the first detection signal CTr is at a first voltage level, and the second detection signal CTg is at a second voltage level. The first voltage level may be different from the second voltage level.

In some embodiments, the detection period includes a first detection period, a second detection period, and a third detection period. During the first detection period, each of the detection circuits 180 of the first color pixels Pr [1,1] to Pr [n, n] in the pixel 100 provides the first detection signal CTr to the corresponding compensation circuit 160. During the second detection period, each of the detection circuits 180 of the second color pixel Pg in the pixels 100 provides a second detection signal CTg to the corresponding compensation circuit 160. During the third detection period, each of the detection circuits 180 of the third color pixel Pb in the pixels 100 provides a third detection signal CTb to the corresponding compensation circuit 160.

It is worth noting that the electrical signals of the detection signals of the above-mentioned various color pixels are The level of the pressure level or the length of the period is only an example for convenience of explanation, and is used to limit the disclosure. Those skilled in the art can adjust the voltage level of the detection signal according to actual needs.

In other words, the detection signals CTr, CTg, and CTb of color pixels of different colors are independent of each other. The voltage levels of different detection signals CTr, CTg, and CTb may be different. In other embodiments, the detection period may include other detection periods. During the same detection period, the detection signals of different color pixels can be given the same or different voltage levels.

As a result, in some embodiments, the test signals CTr, CTg, and CTb of different voltage levels can display test patterns such as red, green, blue, black, or white.

In addition, in some embodiments, as shown in FIG. 6, the control terminals of the detection transistors Tct of the pixels in the display panel are connected to each other. In other words, the pixels Pr [1,1] ~ Pr [n, n], Pg [1,1] ~ Pg [n, n], and Pb [1,1] ~ Pb [n, n] pass through the detection control signal line L _cs are interconnected. Specifically, each of the pixels Pr [1,1] ~ Pr [n, n], Pg [1,1] ~ Pg [n, n], and Pb [1,1] ~ Pb [n, n] is detected The control terminals of the transistor Tct are connected to each other through a detection control signal line L _cs .

In this way, the detection control signal CS is shared by the pixels in the display panel, and the detection signals CTr, CTg, or CTb are shared by the pixels of different colors, so that the total number of input signals can be reduced. Due to the reduction of the detection area around the display panel, the number of surface accesses can be increased, and the cost can be reduced.

Please refer to Figure 9. FIG. 9 is a flowchart of a method for detecting a display panel according to some embodiments of the present disclosure. For the sake of convenience and clear description, the detection method 900 of the display panel described below is in cooperation with FIGS. 1 to 8 The embodiment shown in the figure is described, but is not limited thereto. Any person skilled in the art can make various modifications and retouching without departing from the spirit and scope of this case. As shown in FIG. 9, the method 900 for detecting a display panel includes operations S910 to S970.

First, in operation S910, during the detection period, the plurality of detection circuits 180 in the plurality of pixels 100 are turned on correspondingly according to the detection control signal CS.

Next, in operation S920, the detection signal CT is provided by the detection circuit 180 to the corresponding compensation circuit 160 in the pixel 100.

Next, in operation S930, the detection signal CT is received by the compensation circuit 160, and the detection signal CT is output as the driving signal Vg to the corresponding driving transistor Td in the pixel 100.

Next, in operation S940, the driving transistor Td outputs a driving current I1 to the corresponding light emitting element 140 in the pixel 100 for detection according to the driving signal Vg.

Then, in operation S950, the data signal V _{DATA is} provided by the writing circuit 120 to the compensation circuit 160 during the display period.

Then, in operation S960, the compensation signal 160 generates a driving signal Vg according to the data signal V _DATA .

Finally, in operation S970, the driving transistor Td outputs the driving current I1 to the corresponding light emitting element 140 in the pixel 100 for display according to the driving signal Vg.

Those skilled in the art can directly understand how the detection method 900 of the display panel performs the operations and functions based on the display panel and the pixels 100, 100a, and 100b in the various embodiments described above, and therefore will not be described in detail here.

To sum up, in the display panel and the display panel detection method of the present disclosure, by simplifying the number of signals during the detection period, and by using a shared detection signal and a signal transmission line, it is possible to reduce the demand for the peripheral area of the display panel, thereby enabling Increase the number of noodles to reduce costs.

Although the present disclosure has been disclosed as above in the form of implementation, it is not intended to limit the present disclosure. Any person with ordinary knowledge in the field can make various changes and modifications without departing from the spirit and scope of the present disclosure. The scope of protection shall be determined by the scope of the attached patent application.

Claims (11)

A display panel includes a plurality of pixels, and any one of the pixels includes: a compensation circuit including a first node for providing a driving signal; and a driving transistor for receiving a system high voltage. The first node receives the driving signal and outputs a driving current to a light-emitting element according to the driving signal; and a detection circuit for providing a detection signal to the compensation circuit; wherein, when the compensation circuit receives the detection signal The compensation circuit outputs the detection signal as the driving signal. When the compensation circuit receives a data signal, the compensation circuit generates the driving signal according to the data signal, wherein a data voltage level of the driving signal is negatively related to An absolute value of a threshold voltage of the driving transistor. The display panel according to claim 1, wherein any one of the pixels further includes: a writing circuit coupled to the compensation circuit for providing the data signal to the compensation circuit, wherein the writing circuit includes: A first transistor includes a first terminal, a second terminal, and a control terminal. The first terminal of the first transistor is used to receive a reference voltage level, and the second terminal of the first transistor Coupled to the compensation circuit, the control terminal of the first transistor is used to receive a light-emitting control signal; and a second transistor including a first terminal, a second terminal, and a control terminal, the second transistor The first terminal is coupled to the second terminal of the first transistor, the second terminal of the second transistor is used to receive the data signal, and the control terminal of the second transistor is used to receive a first Scan control signals. The display panel according to claim 2, wherein the compensation circuit includes: a capacitor including a first terminal and a second terminal, the first terminal of the capacitor is coupled to the second terminal of the first transistor, The second terminal of the capacitor is coupled to the first node; a third transistor includes a first terminal, a second terminal, and a control terminal; the second terminal of the third transistor is coupled to the first node Node, the control terminal of the third transistor is used to receive the first scanning control signal; a fourth transistor includes a first terminal, a second terminal, and a control terminal; One terminal is coupled to the first terminal of the third transistor, the second terminal of the fourth transistor is coupled to a second terminal of the driving transistor, and the control terminal of the fourth transistor is used to receive The first scanning control signal; a fifth transistor including a first terminal, a second terminal and a control terminal, the first terminal of the fifth transistor is coupled to the second terminal of the driving transistor, The second terminal of the fifth transistor is coupled to the light emitting element, and the control terminal of the fifth transistor is used to receive the light emitting control signal. And a sixth transistor, including a first terminal, a second terminal, and a control terminal, the first terminal of the sixth transistor is used to receive a second scanning control signal, and the sixth transistor The second terminal is coupled to the light emitting element, and the control terminal of the sixth transistor is coupled to the first terminal of the sixth transistor. The display panel according to claim 3, wherein the detection circuit includes a detection transistor, the detection transistor includes a first terminal, a second terminal, and a control terminal, and the first terminal of the detection transistor is used for Receiving the reference voltage level or the detection signal, the second terminal of the detection transistor is coupled to the first terminal of the third transistor and the first terminal of the fourth transistor, and the detection transistor The control end is used for receiving a third scanning control signal or a detection control signal. The display panel according to claim 1, wherein a control terminal of the driving transistor is directly coupled to the first node, the detection circuit includes a detection transistor, and the detection transistor includes a first terminal and a second terminal. And a control terminal, wherein the first terminal of the detection transistor is used to receive the detection signal, the control terminal of the detection transistor is used to receive a detection control signal, and the second terminal of the detection transistor is directly coupled The first node is configured to provide the detection signal to the compensation circuit. The display panel according to claim 5, wherein a control terminal of a detection transistor of a first pixel and a second pixel of the pixels is connected to each other. The display panel according to claim 1, wherein the pixels include a plurality of first color pixels and a plurality of second color pixels, and each of the first color pixels receives a first voltage level of the detection signal, A second voltage level different from the detection signals received by the second color pixels. The display panel according to claim 7, wherein the detection circuits of the first color pixels are coupled to each other. A detection method for a display panel includes: turning on a plurality of detection circuits in a plurality of pixels according to a detection control signal; using each of the detection circuits to provide a detection signal to a corresponding compensation circuit in the pixels; if the The compensation circuit receives the detection signal, and then uses the compensation circuit to output the detection signal as a driving signal to a corresponding driving transistor in the pixels; if the compensation circuit receives a data signal, the compensation circuit is used to The data signal generates the driving signal, wherein a data voltage level of the driving signal is negatively related to an absolute value of a threshold voltage of the driving transistor; and the driving transistor is used to output a driving current to the driving signals according to the driving signal. A corresponding light emitting element in the pixel. The method for detecting a display panel according to claim 9, further comprising: during a detection period, each of the detection circuits is turned on according to the detection control signal, and the detection signal is provided to the compensation circuit, so that the compensation circuit will The detection signal is output to the driving transistor as the driving signal; and during a display period, each of the detection circuits is kept off according to the detection control signal, so that the driving signal and the input signal of the detection circuit are independent of each other. . The method for detecting a display panel according to claim 9, further comprising: in a first detection period in a detection period, each of the detection circuits of the plurality of first color pixels in the pixels provides a A first detection signal to the corresponding compensation circuit; and a second detection signal provided by each of the detection circuits of the plurality of second color pixels in the pixels during a second detection period of the detection period To the corresponding compensation circuit, a first voltage level of the first detection signal and a second voltage level of the second detection signal are different.