TWI682381B - Pixel circuit, display device and pixel circuit driving method - Google Patents

Abstract

A pixel circuit includes a driving transistor, a data transistor, a first transistor and a second transistor. The driving transistor is configured to be turned on selectively according to the data signal to output a driving current to drive an emitting unit. The data transistor is configured to be turned on selectively according to the scanning signal to output a data signal to the driving transistor from a data line. The first transistor is configured to be turned on selectively corresponding to a reading signal to control a voltage level of a control terminal of the driving transistor according to a first detecting signal. The second transistor is configured to be turned on selectively corresponding to the reading signal to control a voltage level of a source terminal of the driving transistor by outputting a second detecting signal from the data line.

Description

Pixel circuit, display device and pixel circuit driving method

The present disclosure relates to a pixel circuit and a display device, and particularly relates to a pixel circuit and a display device with a compensation function.

In recent years, with the rising awareness of environmental protection, demands for energy saving, service life, color saturation, and power quality have gradually become factors for consumers to consider buying. At the same time, light-emitting diodes (LEDs) have rapidly developed and The cost reduction has driven the LED to become the mainstream of the future development of the lighting and display market.

Since the light-emitting diode system is driven by electric current, the characteristics of the transistor and the light-emitting diode will change with time under the user's long-term operation, thus causing mura or uneven brightness.

One aspect of this disclosure relates to a pixel circuit. The pixel circuit includes a driving transistor, a data transistor, a first transistor, and a second transistor. The driving transistor is used to selectively conduct according to the data signal, and output the driving current to drive the light emitting element. The data transistor is used to selectively guide according to the scanning signal To output the data signal from the data line to the driving transistor. The first transistor is used to selectively turn on in response to the read signal to control the voltage level of the control terminal of the driving transistor according to the first detection signal. The second transistor is used for selectively conducting corresponding to the read signal, and outputs the second detection signal from the data line to control the voltage level of the source terminal of the driving transistor.

Another aspect of this disclosure relates to another display device. The display device includes a display panel and a source driver. The display panel contains a plurality of pixel circuits. Any one of the pixel circuits includes a driving transistor, a data transistor, a first detection circuit, and a second detection circuit. The driving transistor is used to selectively conduct according to the data signal, and output the driving current to drive the light emitting element. The data transistor is used to selectively conduct according to the scanning signal to output the data signal from the data line to the driving transistor. The first detection circuit is used to selectively conduct corresponding to the read signal to control the voltage level of the control terminal of the driving transistor according to the first detection signal. The second detection circuit is used to selectively conduct corresponding to the read signal, and output the second detection signal from the data line to control the voltage level of the source terminal of the driving transistor. The source driver is coupled to the pixel circuit for receiving the first sensing parameter or the second sensing parameter, and adjusting the data signal according to the first sensing parameter or the second sensing parameter.

Another aspect of the present disclosure relates to another method of driving pixel circuits. The first detection circuit is selectively turned on corresponding to the read signal to control the voltage level of the control terminal of the driving transistor according to the first detection signal; the driving transistor provides the first level according to the voltage level of the control terminal of the driving transistor A sensing parameter; the second detection circuit is selectively turned on corresponding to the read signal to control the voltage level of the source terminal of the driving transistor according to the second detection signal; the light emitting element is based on the source terminal of the driving transistor Voltage level provides the second sensing parameter; by the source The pole driver adjusts the data signal according to the first sensing parameter and the second sensing parameter; and the data transistor is selectively turned on according to the scan signal to output the data signal to the driving transistor to drive the light emitting element.

120‧‧‧ source driver

140‧‧‧ gate driver

160‧‧‧Pixel circuit

TD1‧‧‧Data Transistor

TD2‧‧‧Drive transistor

163‧‧‧ First detection circuit

164‧‧‧Second detection circuit

C1‧‧‧Capacitance

T1, T2‧‧‧transistor

LED‧‧‧Lighting element

Dn‧‧‧Data cable

S1‧‧‧ Scanning signal

RD‧‧‧Read signal

RST‧‧‧ First detection signal

SEN‧‧‧Second detection signal

DATA‧‧‧Data signal

I1‧‧‧Drive current

VDD‧‧‧System high voltage

VSS‧‧‧System low voltage

Vd‧‧‧Extreme

Vg‧‧‧Control terminal

Vs‧‧‧ source extreme

P1, P2‧‧‧During detection

D1, D2‧‧‧sensing parameters

800, 900 ‧‧‧ pixel circuit driving method

S810~S860, S910~S960‧‧‧Operation

FIG. 1 is a schematic diagram of a display device according to some embodiments of the present disclosure.

FIG. 2 is a schematic diagram of a pixel circuit according to some embodiments of the present disclosure.

FIG. 3 is a schematic diagram of voltage level signals according to some embodiments of the present disclosure.

FIG. 4 is a schematic diagram illustrating the state of each transistor in the pixel circuit of FIG. 2 during the first detection period according to some embodiments of the present disclosure.

FIG. 5 is a schematic diagram illustrating the state of each transistor in the pixel circuit of FIG. 2 during the second detection period according to some embodiments of the present disclosure.

FIG. 6 is a schematic diagram illustrating the state of each transistor in the pixel circuit of FIG. 2 during the driving period according to some embodiments of the present disclosure.

FIG. 7 is a schematic diagram of another pixel circuit according to some embodiments of the present disclosure.

FIG. 8 is a flowchart illustrating a pixel circuit driving method according to some embodiments of the present disclosure.

FIG. 9 is a flowchart illustrating a pixel circuit driving method according to some embodiments of the present disclosure.

The following is a detailed description of the embodiments in conjunction with the accompanying drawings, but the provided embodiments are not intended to limit the scope covered by the present disclosure, and the description of structural operations is not intended to limit the order of execution, any recombination of components The structure and the resulting devices with equal effects are all covered by this disclosure. In addition, the drawings are for illustrative purposes only, and are not drawn according to the original dimensions. For ease of understanding, the same elements or similar elements in the following description will be described with the same symbols.

Terms used throughout the specification and the scope of patent application, unless otherwise specified, usually have the ordinary meaning that each term is used in this field, in the content disclosed herein, and in special content.

The terms "first", "second", "third", etc. used in this article do not specifically refer to order or order, nor are they intended to limit this disclosure. They are merely used to distinguish the same technology The term describes the element or operation only.

In addition, with regard to "coupled" or "connected" used in this article, it can mean that two or more elements directly make physical or electrical contact with each other, or indirectly make physical or electrical contact with each other, or can refer to two or Multiple elements interoperate or act.

Please refer to Figure 1. FIG. 1 is a schematic diagram of a display device 100 according to some embodiments of the present disclosure. As shown in FIG. 1, the display device includes a display panel DP, a source driver 120 and a gate driver 140. The display panel DP includes a plurality of pixel circuits 160. Structurally, the display panel DP is coupled to the source driver 120 and the gate driver 140. Specifically, the display panel The pixel circuit 160 in DP is coupled to the source driver 120 through the data lines DL1 to DLn. The pixel circuit 160 in the display panel DP is coupled to the gate driver 140 through the scan lines SL1~SLn.

Please refer to Figure 2. FIG. 2 is a schematic diagram of a pixel circuit 160 according to some embodiments of the present disclosure. As shown in FIG. 2, the pixel circuit 160 includes a data transistor TD1, a driving transistor TD2, a first detection circuit 163, a second detection circuit 164, and a light emitting element LED. In some embodiments, the pixel circuit 160 further includes a capacitor C1. In some embodiments, the first detection circuit 163 includes a first transistor T1. The second detection circuit 164 includes a second transistor T2.

Structurally, the first end of the data transistor TD1 is electrically coupled to the data line Dn. The second terminal of the data transistor TD1 is electrically coupled to the control terminal Vg of the driving transistor TD2. The drain terminal Vd of the driving transistor TD2 is electrically coupled to the system high voltage VDD. The source terminal Vs of the driving transistor TD2 is electrically coupled to the light emitting element LED. The first terminal of the capacitor C1 is electrically coupled to the control terminal Vg of the driving transistor TD2. The second terminal of the capacitor C1 is electrically coupled to the source terminal Vs of the driving transistor TD2. The first terminal of the first transistor T1 of the first detection circuit 163 is electrically coupled to the detection line. The second terminal of the first transistor T1 of the first detection circuit 163 is electrically coupled to the control terminal Vg of the driving transistor TD2. The second terminal of the second transistor T2 of the second detection circuit 164 is electrically coupled to the source terminal Vs of the driving transistor TD2.

In some embodiments, the first ends of the first detection circuits 163 of the two or more pixel circuits 160 in the plurality of pixel circuits 160 included in the display panel DP are electrically coupled to each other. Specifically, the plurality of pixel circuits 160 in the display panel DP can be divided into one or more areas according to the setting area or actual control requirements In the field, the first ends of the first detection circuits 163 of the pixel circuits 160 located in the same area are electrically coupled to each other. In other words, the two or more pixel circuits 160 in the plurality of pixel circuits 160 included in the display panel DP provide the first detection signal RST to the two or more corresponding first detection circuits 163 through the common detection line.

In operation, the data transistor TD1 is used to selectively conduct according to the scan signal S1 to output the data signal DATA from the data line Dn to the driving transistor TD2. Specifically, the first end of the data transistor TD1 is used to receive the data signal DATA from the data line Dn. The control terminal of the data transistor TD1 is used to receive the scanning signal S1. The second terminal of the data transistor TD1 is used to output the data signal DATA to the control terminal Vg of the driving transistor TD2.

The driving transistor TD2 is used to selectively conduct according to the data signal DATA, and drive the light emitting element LED with the output driving current I1. Specifically, the drain terminal Vd of the driving transistor TD2 is used to receive the system high voltage VDD. The control terminal Vg of the driving transistor TD2 is used to receive the data signal DATA. The source terminal Vs of the driving transistor TD2 is used to output the driving current I1 to the light emitting element LED.

The first detection circuit 163 is used to selectively conduct corresponding to the read signal RD to control the voltage level of the control terminal Vg of the driving transistor TD2 according to the first detection signal RST. Specifically, the control terminal of the first transistor T1 in the first detection circuit 163 is used to receive the read signal RD. The first end of the first transistor T1 is used to receive the first detection signal RST. The second terminal of the first transistor T1 is used to output a first detection signal RST to control the voltage level of the control terminal Vg of the driving transistor TD2.

The second detection circuit 164 is configured to be selectively turned on corresponding to the read signal RD to output the second detection signal SEN from the data line Dn to control the drive The voltage level of the source terminal Vs of the dynamic transistor TD2. Specifically, the control terminal of the second transistor T2 in the second detection circuit 164 is used to receive the read signal RD. The first end of the second transistor T2 is used to receive the second detection signal SEN from the data line Dn. The second terminal of the second transistor T2 outputs a second detection signal SEN to control the voltage level of the source terminal Vs of the driving transistor TD2.

In addition, the source driver 120 is used to receive the first sensing parameter D1 or the second sensing parameter D2, and adjust the data signal DATA according to the first sensing parameter D1 or the second sensing parameter D2.

In other words, by adjusting the connection mode of the detection transistor, adding a transistor and using the read signal RD to switch on or off, both the data signal and the detection signal can be transmitted through the data line. Further details will be explained in subsequent paragraphs.

For the convenience of description, the specific operations of each element in the pixel circuit 160 in FIG. 2 will be described with the drawings in the following paragraphs. Please refer to Figure 3 and Figure 4 together. FIG. 3 is a schematic diagram of voltage level signals according to some embodiments of the present disclosure. FIG. 4 is a schematic diagram illustrating the state of each transistor in the pixel circuit 160 of FIG. 2 during the first detection period P1 according to some embodiments of the present disclosure.

In some embodiments, as shown in FIG. 3, in the first detection period P1, the scanning signal S1 is turned to a low level, and the read signal RD is turned to a high level. In addition, the first detection signal RST is turned to the turn-off voltage level, and the second detection signal SEN is turned to the light-emitting voltage level.

As shown in FIG. 4, during the first detection period P1, the control terminal of the data transistor TD1 receives the low-level scanning signal S1 and turns off. In other words, During the first detection period P1, the second terminal of the data transistor TD1 does not output a data signal to the control terminal Vg of the driving transistor TD2.

In addition, as shown in FIG. 4, in the first detection period P1, the first transistor T1 of the first detection circuit 163 is turned on corresponding to the read signal RD, and the driving transistor TD2 corresponds to the first detection circuit 163 The first detection signal RST output by the first transistor T1 is turned off. Specifically, the control terminal of the first transistor T1 receives the high-level read signal RD and turns on. The first detection signal RST is received by the first end of the first transistor T1. The first detection signal RST is output from the second terminal of the first transistor T1 to the control terminal Vg of the driving transistor TD2 to control the voltage level of the control terminal Vg of the driving transistor TD2 to be at the turn-off voltage level.

On the other hand, as shown in FIG. 4, in the first detection period P1, the second transistor T2 of the second detection circuit 164 is turned on corresponding to the read signal RD, and the light emitting element LED corresponds to the second transistor T2 The output second detection signal SEN is turned on and provides the second sensing parameter D2 to the data line Dn, so that the data signal DATA is adjusted corresponding to the second sensing parameter D2.

Specifically, the control terminal of the second transistor T2 receives the high-level read signal RD and turns on. The second detection signal SEN is received from the data line Dn by the first end of the second transistor T2. The second detection signal SEN is output from the second end of the second transistor T2 to the source terminal Vs of the driving transistor TD2 and the first end of the light emitting element LED. The second transistor T2 controls the source terminal Vs of the driving transistor TD2 and the voltage of the first end of the light emitting element LED to be at the light emitting voltage level according to the second detection signal SEN, so as to obtain the second sensing parameter from the light emitting element LED D2.

In some embodiments, the second detection signal SEN may be a signal that gradually increases the voltage level. For example, first input an input voltage of about 1 volt to detect Measure the drive current I1, then gradually increase the input voltage and continue to detect the drive current I1 until the drive current I1 reaches the expected required amperage. Or, assuming that when a voltage of about 1 volt is input, it is expected that the measured driving current I1 should be about 1 ampere, but the actual measured driving current is about 1.2 amperes, the input voltage will be reduced to compensate, so that the drive The current I1 is maintained at about 1 amp.

In some other embodiments, the second detection signal SEN may be a constant current. For example, the second detection circuit 164 inputs a fixed current and detects the voltage value to obtain the variation degree of the light emitting element LED. According to this, the signal can be corrected by sensing the signal back, so that the brightness of each light-emitting element remains consistent.

Next, please refer to Figure 3 and Figure 5 together. FIG. 5 is a schematic diagram illustrating the state of each transistor in the pixel circuit 160 of FIG. 2 during the second detection period according to some embodiments of the present disclosure.

In some embodiments, as shown in FIG. 3, in the second detection period P2, the scan signal S1 maintains a low level, and the read signal RD maintains a high level. In addition, the first detection signal RST is turned to the on voltage level, and the second detection signal SEN is turned to the off voltage level.

As shown in FIG. 5, in the first detection period P2, the control terminal of the data transistor TD1 receives the low-level scan signal S1 and turns off. In other words, during the second detection period P2, the second terminal of the data transistor TD1 does not output a data signal to the control terminal Vg of the driving transistor TD2.

In addition, as shown in FIG. 5, in the second detection period P2, the first transistor T1 of the first detection circuit 163 is turned on corresponding to the read signal RD, and the driving transistor TD2 corresponds to the first detection signal RST is turned on and provides the first sensing parameter D1 to the data line Dn, so that the data signal DATA corresponds to the first sensing Adjust the parameter D1.

Specifically, the control terminal of the first transistor T1 receives the high-level read signal RD and turns on. The first detection signal RST is received by the first end of the first transistor T1. The first detection signal RST is output from the second terminal of the first transistor T1 to the control terminal Vg of the driving transistor TD2 to control the voltage level of the control terminal Vg of the driving transistor TD2. The voltage level of the control terminal Vg of the driving transistor TD2 is controlled by the first transistor T1 according to the first detection signal RST to be at the turn-on voltage level to obtain the first sensing parameter D1 from the driving transistor TD2.

On the other hand, as shown in FIG. 5, in the second detection period P2, the second transistor T2 of the second detection circuit 164 is turned on corresponding to the read signal RD, and the light emitting element LED corresponds to the second detection signal SEN ends. Specifically, the control terminal of the second transistor T2 receives the high-level read signal RD and turns on. The second detection signal SEN is received from the data line Dn by the first end of the second transistor T2. The second detection signal SEN is output from the second end of the second transistor T2 to the source terminal Vs of the driving transistor TD2 and the first end of the light emitting element LED. The second transistor T2 controls the source terminal Vs of the driving transistor TD2 and the voltage of the first end of the light-emitting element LED to be at the cut-off voltage level according to the second detection signal SEN to cut off the light-emitting element LED.

According to this, the current of the driving transistor TD2 can be detected when the signals of different sizes are input by the first detection circuit 163 to obtain the degree of variation of the driving transistor TD2, and then the sensing signal is returned to correct the signal, so that each driving The driving current I1 generated by the transistor TD2 remains the same.

Next, please refer to Figure 6. FIG. 6 illustrates each transistor in the pixel circuit 160 of FIG. 2 during the driving period according to some embodiments of the present disclosure Schematic diagram of the state of the body.

In some embodiments, during the driving period, the scanning signal S1 is turned to a high level, and the reading signal RD is turned to a low level. In addition, both the first detection signal RST and the second detection signal SEN are floating voltage levels.

As shown in FIG. 6, during the driving period, the first transistor T1 of the first detection circuit 163 and the second transistor T2 of the second detection circuit 164 are turned off, and the data transistor TD1 is turned on corresponding to the scan signal S1 And provide data signal DATA to drive transistor TD2 to drive the light emitting element LED.

Specifically, the control terminal of the first transistor T1 receives the low-level read signal RD and turns off. The control terminal of the second transistor T2 receives the low-level read signal RD and turns off. The control terminal of the data transistor TD1 receives the high-level scanning signal S1 and turns on. The first end of the data transistor TD1 receives the data signal DATA from the data line Dn, and outputs the data signal DATA from the second end of the data transistor TD1 to the control terminal Vg of the driving transistor TD2. The driving transistor TD2 outputs a driving current I1 from the source terminal Vs of the driving transistor TD2 according to the data signal DATA to drive the light emitting element LED.

In other words, during the driving period, the data transistor is turned on according to the scan signal S1 and the data signal DATA is written into the drive transistor TD2 by the data line Dn, and the light emitting element LED is driven by the drive current I1.

Please refer to Figure 7. FIG. 7 is a schematic diagram of another pixel circuit 160 according to other embodiments of the present disclosure. In the embodiment shown in FIG. 7, elements similar to those in the embodiment of FIG. 2 are denoted by the same element symbols, and their operations have been described in the previous paragraphs, and will not be repeated here. Compared with the embodiment shown in FIG. 2, in this embodiment, the light-emitting element LED is structurally It is electrically coupled to the system high voltage VDD and the drain terminal Vd of the driving transistor TD2. The source terminal Vs of the driving transistor TD2 is electrically coupled to the system low voltage VSS. The second terminal of the second transistor T2 of the second detection circuit 164 is electrically coupled to the drain terminal Vd of the driving transistor TD2.

In operation, compared with the embodiment shown in FIG. 2, in this embodiment, the level of the light-emitting voltage level and the cut-off voltage level of the second detection signal SEN are opposite. Specifically, during the first detection period P1, the second detection signal SEN is located at the light-emitting voltage level to gradually lower the voltage level or the constant current. During the second detection period P2, the second detection signal SEN is at the cut-off voltage level and is at a high voltage level.

In this way, the light emitting element LED can be used to selectively turn on according to the voltage level of the drain terminal Vd of the driving transistor TD2. The second detection circuit 164 can be used to selectively turn on corresponding to the read signal RD to output the second detection signal SEN from the data line Dn to control the voltage level of the drain terminal Vd of the driving transistor TD2. Specifically, the control terminal of the second transistor T2 in the second detection circuit 164 is used to receive the read signal RD. The first end of the second transistor T2 is used to receive the second detection signal SEN from the data line Dn. The second terminal of the second transistor T2 outputs a second detection signal SEN to control the voltage level of the drain terminal Vd of the driving transistor TD2.

Please refer to Figure 8. FIG. 8 is a flowchart illustrating a pixel circuit driving method 800 according to some embodiments of the present disclosure. For convenience and clear explanation, the following pixel circuit driving method 800 is described in conjunction with the embodiments shown in FIGS. 1 to 6, but not limited to this. Anyone who is familiar with this skill will not deviate from this case. Within the spirit and scope, various changes and modifications can be made. As the 8th As shown in the figure, the pixel circuit driving method 800 includes operations S810-S860.

First, in operation S810, the first detection circuit 163 is selectively turned on corresponding to the read signal RD to control the voltage level of the control terminal Vg of the driving transistor TD2 according to the first detection signal RST.

Next, in operation S820, the first sensing parameter D1 is provided by the driving transistor TD2 according to the voltage level of the control terminal Vg of the driving transistor TD2.

Next, in operation S830, the second detection circuit 164 is selectively turned on corresponding to the read signal RD to control the voltage level of the source terminal Vs of the driving transistor TD2 according to the second detection signal SEN.

Next, in operation S840, the light-emitting element LED provides the second sensing parameter D2 according to the voltage level of the source terminal Vs of the driving transistor TD2.

Next, in operation S850, the source driver 120 adjusts the data signal DATA according to the first sensing parameter D1 and the second sensing parameter D2.

Finally, in operation S860, the data transistor TD1 is selectively turned on according to the scan signal S1 to output the data signal DATA from the data line Dn to the driving transistor TD2 to drive the light emitting element LED.

Please refer to Figure 9. FIG. 9 is a flowchart illustrating a pixel circuit driving method 900 according to some embodiments of the present disclosure. For convenience and clarity, the following pixel circuit driving method 900 is described in conjunction with the embodiment shown in FIG. 7, but not limited to this. Anyone who is familiar with this skill will not deviate from the spirit and scope of this case , When you can make various changes and retouching. As shown in FIG. 9, the pixel circuit driving method 900 includes operations S910 to S960. In the embodiment shown in FIG. 9, operations similar to those in the embodiment of FIG. 8 are denoted by the same step numbers, and their operations have been described in the previous paragraphs, and will not be repeated here.

Compared with the embodiment shown in FIG. 8, in this embodiment, in operation S930, the second detection circuit 164 is selectively turned on corresponding to the read signal RD to control the driving circuit according to the second detection signal SEN The voltage level of the drain terminal Vd of the crystal TD2. In operation S940, the second sensing parameter D2 is provided by the light emitting element LED according to the voltage level of the drain terminal Vd of the driving transistor TD2.

Those of ordinary skill in the art can directly understand how the pixel circuit driving methods 800 and 900 perform these operations and functions based on the source driver 120 and the pixel circuit 160 in the various embodiments described above, so they are not described here. .

In summary, in the pixel circuit 160 and the display device of the present disclosure, by adding the first detection circuit 163 and the switching of the read signal RD, both the data signal and the detection signal can pass through the data line transmission. In this way, data compensation can be performed without the design of adding a package pin (COF pin) or a new multiplexer (mux).

Although this disclosure has been disclosed as above by way of implementation, it is not intended to limit this disclosure. Anyone with ordinary knowledge in the art can make various changes and modifications within the spirit and scope of this disclosure, so this disclosure The scope of protection shall be deemed as defined by the scope of the attached patent application.

160‧‧‧Pixel circuit

TD1‧‧‧Data Transistor

TD2‧‧‧Drive transistor

163‧‧‧ First detection circuit

164‧‧‧Second detection circuit

C1‧‧‧Capacitance

T1, T2‧‧‧transistor

LED‧‧‧Lighting element

Dn‧‧‧Data cable

S1‧‧‧ Scanning signal

RD‧‧‧Read signal

RST‧‧‧detection signal

VDD‧‧‧System high voltage

VSS‧‧‧System low voltage

Vd‧‧‧Extreme

Vg‧‧‧Control terminal

Vs‧‧‧ source extreme

Claims (19)

A pixel circuit includes: a driving transistor for selectively conducting according to a data signal to output a driving current to drive a light-emitting element; and a data transistor for selectively conducting according to a scanning signal to Output the data signal from a data line to the driving transistor; a first transistor for selectively conducting corresponding to a read signal to control a control terminal of the driving transistor according to a first detection signal A voltage level; a second transistor for selectively conducting corresponding to the read signal to output a second detection signal from the data line to control the voltage level of a source terminal of the driving transistor; and A capacitor, a first terminal of the capacitor is electrically connected to the control terminal of the driving transistor, and a second terminal of the capacitor is electrically connected to the source terminal of the driving transistor. The pixel circuit according to claim 1, wherein during a first detection period, the first transistor and the second transistor are turned on corresponding to the read signal, and the driving transistor is corresponding to the first detection The signal is turned off, the light-emitting element is turned on corresponding to the second detection signal, and a second sensing parameter is provided to the data line, so that the data signal is adjusted corresponding to the second sensing parameter. The pixel circuit according to claim 1, wherein during a second detection period, the first transistor and the second transistor are turned on corresponding to the read signal, and the light-emitting element corresponds to the second detection signal By the end, the drive transistor The body is turned on corresponding to the first detection signal and provides a first sensing parameter to the data line, so that the data signal is adjusted corresponding to the first sensing parameter. The pixel circuit according to claim 1, wherein during a driving period, the first transistor and the second transistor are turned off, the data transistor is turned on corresponding to the scan signal, and the data signal is provided to the driver Transistor to drive the light emitting element. A display device includes: a display panel including a plurality of pixel circuits, any of the pixel circuits includes: a driving transistor for selectively conducting according to a data signal to output a driving current to drive A light emitting element; a data transistor for selectively conducting according to a scanning signal to output the data signal from a data line to the driving transistor; a first detection circuit corresponding to a read signal Selectively turn on to control the voltage level of a control terminal of the driving transistor according to a first detection signal; and a second detection circuit to selectively turn on in response to the read signal The data line outputs a second detection signal to control the voltage level of a source terminal of the driving transistor; and a source driver, coupled to the pixel circuits, for receiving a first sensing parameter or a second Sensing parameters, and adjusting the data signal according to the first sensing parameters or the second sensing parameters. The display device according to claim 5, wherein any of the pixel circuits further includes: a capacitor, a first terminal of the capacitor is electrically connected to the control terminal of the driving transistor, and a The second end is electrically connected to the source terminal of the driving transistor. The display device according to claim 5, wherein one drain terminal of the driving transistor is used to receive a system high voltage, the control terminal of the driving transistor is used to receive the data signal, and the source terminal of the driving transistor It is used to output the driving current to the light-emitting element. A control terminal of the data transistor is used to receive the scan signal. A first end of the data transistor is coupled to the data line and used to receive the data signal. A second terminal of the crystal is coupled to the control terminal of the driving transistor and used to output the data signal. The display device according to claim 5, wherein the first detection circuit includes: a first transistor, a control terminal of the first transistor is used to receive the read signal, and a first of the first transistor One end is used to receive the first detection signal, and a second end of the first transistor is coupled to the control end of the driving transistor. The display device according to claim 5, wherein the second detection circuit includes: a second transistor, a control terminal of the second transistor is used to receive the read signal, and a first of the second transistor One end is coupled to the data line and used to receive In the second detection signal, a second end of the second transistor is coupled to the source terminal of the driving transistor. The display device according to claim 5, wherein in a first detection period, the first detection circuit is turned on corresponding to the read signal to control the control of the driving transistor according to the first detection signal The voltage level of the terminal to turn off the driving transistor, the second detection circuit is turned on corresponding to the read signal to control the voltage level of the source terminal of the driving transistor according to the second detection signal The light-emitting element obtains the second sensing parameter. The display device according to claim 5, wherein in a second detection period, the second detection circuit is turned on corresponding to the read signal to control the source of the driving transistor according to the second detection signal An extreme voltage level is used to turn off the light-emitting device, and the first detection circuit is turned on corresponding to the read signal to control the voltage level of the control terminal of the driving transistor according to the first detection signal The crystal obtains the first sensing parameter. The display device according to claim 5, wherein in a driving period, the first detection circuit and the second detection circuit are turned off according to the read signal, and the data transistor is turned on and output corresponding to the scan signal The data signal is sent to the driving transistor to drive the light emitting element. The display device according to claim 5, wherein two or more pixel circuits in the pixel circuits provide the first detection signal to the first detection circuits through a common detection line. A pixel circuit driving method includes: a first detection circuit is selectively turned on corresponding to a read signal to control the voltage level of a control terminal of a driving transistor according to a first detection signal; The driving transistor provides a first sensing parameter according to the voltage level of the control terminal of the driving transistor; a second detection circuit is selectively turned on corresponding to the read signal to control according to a second detection signal A voltage level of a source terminal of the driving transistor; a light-emitting element provides a second sensing parameter according to the voltage level of the source terminal of the driving transistor; a source driver according to the first sensing parameter Adjusting a data signal with the second sensing parameter; and a data transistor is selectively turned on according to a scanning signal to output the data signal to the driving transistor to drive a light emitting element. The pixel circuit driving method according to claim 14, further comprising: during a first detection period, the first detection circuit and the second detection circuit are turned on corresponding to the read signal, and the The driving transistor is turned off corresponding to the first detection signal, and the light-emitting element is turned on corresponding to the second detection signal and provides the second sensing parameter. The pixel circuit driving method described in claim 14, which It further includes: during a second detection period, the first detection circuit and the second detection circuit are turned on corresponding to the read signal, and the light emitting element is turned off corresponding to the second detection signal, by The driving transistor is turned on corresponding to the first detection signal and provides the first sensing parameter. The pixel circuit driving method according to claim 14, further comprising: during a driving period, the first detection circuit and the second detection circuit are turned off corresponding to the read signal, and the data is powered The crystal is turned on corresponding to the scan signal and outputs the data signal to the driving transistor to drive the light emitting element. The pixel circuit driving method according to claim 14, further comprising: during a first detection period, the voltage of the control terminal of the driving transistor controlled by the first detection circuit is at a turn-off voltage level The second detection circuit controls the voltage level of the source terminal of the driving transistor to a light-emitting voltage level. The pixel circuit driving method according to claim 14, further comprising: during a second detection period, the voltage level of the control terminal of the driving transistor controlled by the first detection circuit is at a turn-on voltage level And the second detection circuit controls the voltage level of the source terminal of the driving transistor to be at a cut-off voltage level.

Images