Display panels and display devices

Abstract

This application provides a display panel and a display device. A plurality of pixel circuits include a Class 1 pixel circuit and a Class 2 pixel circuit, each connected to a plurality of light-emitting elements. Both the Class 1 and Class 2 pixel circuits include a drive transistor. A sensing line is connected to the drive transistor of the Class 2 pixel circuit to receive an electrical signal output from the turned-on drive transistor in the Class 2 pixel circuit. An external circuit is connected to the sensing line and configured to acquire the electrical signal.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to display panels and display devices.

Background Art

[0002] Currently, virtual reality (VR) products are one of the research focuses in the display field. To meet various needs of users, high resolution and good brightness uniformity are required for VR products. However, for the display devices used to produce VR products, the pixel driving circuits in the prior art occupy a large amount of space, and as a result, it is difficult to achieve both high resolution and good brightness uniformity of VR products.

Summary of the Invention

[0003] Therefore, the present application provides a display panel and a display device to achieve both high resolution and brightness uniformity of the display panel and the display device.

[0004] In a first aspect, the present application provides a display panel. The display panel has a display area. The display panel includes a plurality of light-emitting elements located in the display area, a plurality of pixel circuits, a sensing line, and an external circuit. The plurality of pixel circuits include a first type of pixel circuit and a second type of pixel circuit each connected to a plurality of light-emitting elements. Both the first type of pixel circuit and the second type of pixel circuit include a driving transistor. The sensing line is connected to the driving transistor of the second type of pixel circuit to receive an electrical signal output from the driving transistor that is turned on in the second type of pixel circuit. The external circuit is connected to the sensing line and is configured to acquire the electrical signal. <00000​​​​​​​​In display panels and display devices according to some embodiments of the present application, a plurality of pixel circuits include Class 1 pixel circuits and Class 2 pixel circuits. Sensing lines are connected to the drive transistors of the Class 2 pixel circuits to receive electrical signals output from the turned-on drive transistors in the Class 2 pixel circuits. External circuits are connected to the sensing lines and configured to acquire electrical signals. In this way, the Class 2 pixel circuits, sensing lines, and external circuits cooperate with each other to detect electrical signals corresponding to the threshold voltage of the drive transistors in the Class 2 pixel circuits, while the Class 1 pixel circuits do not have a function to support the detection of electrical signals. The external circuits can obtain a compensation value for the threshold voltage of the drive transistors in the Class 2 pixel circuits based on the electrical signals, and use the compensation value to compensate the threshold voltages of the drive transistors in the Class 1 and Class 2 pixel circuits to improve the brightness uniformity of the display panel. Furthermore, since the first-class pixel circuits do not have a function to support the detection of electrical signals, the number of transistors in the first-class pixel circuits is relatively small, the area occupied by the first-class pixel circuits is relatively small, and consequently it is advantageous to increase the number of pixel circuits, enabling high-resolution display in the display panel and display device. In other words, by designing a mixed combination of first-class and second-class pixel circuits, it is possible to achieve both high resolution and brightness uniformity in the display panel and display device. [Brief explanation of the drawing]

[0007] [Figure 1] This is a schematic diagram showing the planar structure of a display panel according to some embodiments of the present invention. [Figure 2] This is a schematic diagram showing the cross-sectional structure obtained along the A-A' cutting line in the display panel shown in Figure 1. [Figure 3] This is a schematic diagram showing a planar structure in which multiple pixel circuits according to several embodiments of the present invention are provided in a display area. [Figure 4] This is a schematic diagram showing a planar structure in which multiple pixel circuits according to several other embodiments of the present invention are provided in a display area. [Figure 5]This is a circuit diagram showing a Class 1 pixel circuit according to several embodiments of the present application. [Figure 6] This is a circuit diagram showing a Class 2 pixel circuit according to several embodiments of the present application. [Figure 7] This is a circuit diagram showing a Class 1 pixel circuit relating to several other embodiments of the present application. [Figure 8] This is a circuit diagram showing a Class II pixel circuit relating to several other embodiments of the present application. [Figure 9] Figure 8 is a drive timing diagram for a type 2 pixel circuit. [Modes for carrying out the invention]

[0008] The technical proposal in the embodiments of this application will be described clearly and completely below with reference to the drawings of the embodiments. It is clear that the embodiments described are only a selection of embodiments of this application, and not all embodiments. All other embodiments that a person skilled in the art could obtain without inventive effort based on the embodiments of this application are within the scope of protection of this application.

[0009] Figure 1 is a schematic diagram showing the planar structure of a display panel according to some embodiments of the present invention.

[0010] As shown in Figure 1, the display panel 100 has a display area 100a and a non-display area 100b surrounding the display area 100a. The display panel 100 includes a plurality of data lines 328, a plurality of scan lines 325, a plurality of light emission control lines 326, and an external circuit 50. The external circuit 50 includes a drive unit 40.

[0011] Multiple scan lines 325 are provided in the display area 100a, extending along the first direction x and arranged at intervals along the second direction y.

[0012] Multiple light emission control lines 326 are provided in the display area 100a, extending along a first direction x and arranged at intervals along a second direction y. A single light emission control line 326 may be provided adjacent to a single scan line 325.

[0013] Multiple data lines 328 extend from display area 100a to display area 100b along the second direction y and are connected to a drive unit 40 bonded to the non-display area 100b. The multiple data lines 328 are further arranged at intervals along the first direction x. The multiple data lines 328 intersect insulatedly with multiple scan lines 325 and multiple light emission control signal lines 326.

[0014] The drive unit 40 may include a source drive.

[0015] The first direction x intersects the second direction y. In some embodiments, the first direction x may be perpendicular to the second direction y. In some other embodiments, the angle between the first direction x and the second direction y may be acute or obtuse.

[0016] Figure 2 is a schematic diagram showing the cross-sectional structure obtained along the A-A' cutting line in the display panel shown in Figure 1.

[0017] As shown in Figure 2, the display panel 100 includes a substrate 31, a drive circuit layer 32, and a light-emitting element layer 33. The drive circuit layer 32 is provided on the substrate 31, and the light-emitting element layer 33 is provided on the side of the drive circuit layer 32 away from the substrate 31.

[0018] In some embodiments, the substrate 31 may include a glass substrate to reduce the manufacturing cost of the display panel. In some other embodiments, the substrate 31 may also include a flexible substrate to give the display panel 100 a bendable function. In some yet other embodiments, the substrate 31 may further include a semiconductor substrate such as a silicon-based substrate.

[0019] The light-emitting element layer 33 includes a plurality of light-emitting elements 331. The plurality of light-emitting elements 331 are located in the display area 100a. Each light-emitting element 331 may include an anode, a cathode, and a light-emitting layer located between the anode and the cathode. The plurality of light-emitting elements 331 may share one cathode. In some embodiments, the light-emitting layer may include an organic light-emitting layer so that the light-emitting element 331 becomes an organic light-emitting diode. The organic light-emitting layer includes an organic material. In some other embodiments, the light-emitting layer may also include an inorganic light-emitting layer.

[0020] The display panel 100 may further include a thin film encapsulation layer 34. The thin film encapsulation layer 34 provides a protective effect on the light-emitting element layer 33 and reduces the risk of erosion of the light-emitting element 331 by oxygen and water vapor. The thin film encapsulation layer 34 is located on the side away from the substrate 31 of the light-emitting element layer 33. The thin film encapsulation layer 34 may include two inorganic thin film encapsulation layers and an organic thin film encapsulation layer located between the two inorganic thin film encapsulation layers.

[0021] In some embodiments, the display panel 100 may further include a functional layer (not shown). The functional layer includes at least one of a circular polarizing plate, a filter layer, and a touch layer. Some functional layers may be provided on the side of the display panel 100 away from the thin film encapsulation layer 34. Some functional layers may also be integrated inside the display panel 100 so as to reduce the thickness of the display panel 100. For example, the touch layer is integrated inside the display panel 100.

[0022] The driving circuit layer 32 includes a plurality of data lines 328, a plurality of scanning lines 325, and a plurality of light-emitting control signal lines 326.

[0023] FIG. 3 is a schematic diagram showing a planar structure in which a plurality of pixel circuits according to some embodiments of the present application are provided in a display area. FIG.  4 is a schematic diagram showing a planar structure in which a plurality of pixel circuits according to some other embodiments of the present application are provided in a display area. <00***099>

[0024] As shown in Figures 3 and 4, the drive circuit layer 32 further includes a plurality of pixel circuits 321, each of which is connected to a plurality of light-emitting elements 331 to drive the emission of light from the plurality of light-emitting elements 331, so that the display panel 100 can display a screen.

[0025] Multiple pixel circuits 321 are located in the display area 100a. The multiple pixel circuits 321 include two distinct types of pixel circuits: a first type 322 and a second type 323, thereby achieving both high resolution and brightness uniformity for the display panel 100.

[0026] Here, the first type of pixel circuit 322 does not include a functional element used to detect the threshold voltage of the transistor inside it, thereby reducing the number of functional elements in the first type of pixel circuit 322 and the area occupied by the functional elements. When the area of ​​the display area 100a in the display panel 100 is constant, the area occupied by the first type of pixel circuit 322 is relatively small, and more pixel circuits 321 can be provided in the display area 100a to meet the high resolution requirements of the display panel 100. The second type of pixel circuit 323 includes a functional element used to detect the threshold voltage of the transistor inside it. A threshold voltage compensation value is calculated using the detected transistor threshold voltage, and coarse compensation is performed on the transistor threshold voltages in the first type of pixel circuit 322 and the second type of pixel circuit 323 based on the compensation value to satisfy the requirement of good brightness uniformity of the display panel 100.

[0027] Note that in Figures 3 and 4, the first-class pixel circuits 322 and the second-class pixel circuits 323 are shown spaced apart, but these are merely to illustrate the arrangement design of the first-class pixel circuits 322 and the second-class pixel circuits 323. The second-class pixel circuits 323 may be arranged adjacent to each other and continuously.

[0028] Figure 5 is a circuit diagram showing a Class 1 pixel circuit according to some embodiments of the present application. Figure 6 is a circuit diagram showing a Class 2 pixel circuit according to some embodiments of the present application.

[0029] As shown in Figures 5 and 6, both the first-class pixel circuit 322 and the second-class pixel circuit 323 include a drive transistor T1.

[0030] As shown in Figures 3, 4, and 6, the display panel 100 further includes a sensing line 327. The sensing line 327 is connected to the drive transistor T1 of the second-class pixel circuit 323 to receive an electrical signal output from the turned-on drive transistor T1 in the second-class pixel circuit 323. The external circuit 50 is connected to the sensing line 327 and configured to acquire the electrical signal.

[0031] The Class 2 pixel circuit 323, sensing line 327, and external circuit 50 cooperate to detect an electrical signal corresponding to the threshold voltage of the drive transistor T1 in the Class 2 pixel circuit 323, while the Class 1 pixel circuit 322 does not have a function to support the detection of electrical signals. The external circuit 50 obtains a compensation value for the threshold voltage of the drive transistor T1 in the Class 2 pixel circuit 323 based on the electrical signal, and uses the compensation value to compensate the threshold voltage of the drive transistor T1 in both the Class 1 pixel circuit 322 and the Class 2 pixel circuit 323, thereby improving the brightness uniformity of the display panel 100. At the same time, since the Class 1 pixel circuit 322 does not have a function to support the detection of electrical signals, the number of transistors in the Class 1 pixel circuit 322 is relatively small, the area occupied by the Class 1 pixel circuit 322 is small, and consequently it is advantageous to increase the number of pixel circuits, enabling high-resolution display in the display panel and display device. In other words, by designing a mixed combination of Type 1 pixel circuit 322 and Type 2 pixel circuit 323, it is possible to achieve both high resolution and brightness uniformity in the display panel and display device.

[0032] As shown in Figures 5 and 6, in some embodiments, both the Class 1 pixel circuit 322 and the Class 2 pixel circuit 323 further include a switching transistor T2. The Class 2 pixel circuit 323 further includes a sensing transistor T4, while the Class 1 pixel circuit 322 does not include a sensing transistor T4. In this way, the Class 1 pixel circuit 322 does not include a transistor used to detect the threshold voltage of the driving transistor T1 in the Class 1 pixel circuit 322, while the Class 2 pixel circuit 323 includes a transistor used to detect the threshold voltage of the driving transistor T1 in the Class 2 pixel circuit 323, and the number of transistors in the Class 1 pixel circuit 322 is smaller than the number of transistors in the Class 2 pixel circuit 323.

[0033] The cathode of each light-emitting element 331 receives a first power supply voltage VSS. The first power supply voltage VSS may be a low-level voltage.

[0034] In the first-class pixel circuit 322 and the second-class pixel circuit 323, when the drive transistor T1 is turned on, a drive current is generated to drive the light emission of the light-emitting element 331. The drive transistor T1 includes a gate, a first pole, and a second pole. The first pole of the drive transistor T1 is connected to the anode of the light-emitting element 331. The second pole of the drive transistor T1 receives a second power supply voltage VDD. The second power supply voltage VDD is different from the first power supply voltage VSS. For example, the second power supply voltage VDD may be greater than the first power supply voltage VSS, and may also be a high-level voltage.

[0035] In this application, the first pole is one of the source and the drain, and the second pole is the other of the source and the drain.

[0036] In the first-class pixel circuit 322 and the second-class pixel circuit 323, the switching transistor T2 controls the transmission of the data signal Data, transmitted by the data line 328, to the gate of the drive transistor T1. The switching transistor T2 includes a first pole, a second pole, and a gate. The first pole of the switching transistor T2 receives the data signal Data. The second pole of the switching transistor T2 is connected to the gate of the drive transistor T1. The gate of the switching transistor T2 receives the scan signal Pscan, transmitted by the scan line 325.

[0037] In the Class 2 pixel circuit 323, the sensing transistor T4 controls the sensing of the current or voltage output from the first pole of the sensing transistor T4 when the drive transistor T1 is turned on. The sensing transistor T4 includes a first pole and a second pole. The first pole of the sensing transistor T4 is connected to the first pole of the drive transistor T1. The second pole of the sensing transistor T4 is connected to the sensing line 327. The sensing line 327 is connected to the external circuit 50. Thus, the Class 2 pixel circuit 323 is a pixel circuit that can realize external compensation for threshold voltage. Compared to a pixel circuit that realizes internal compensation for threshold voltage, for example, a 7T1C pixel circuit which includes seven transistors and one capacitor, the Class 2 pixel circuit 323 has the advantage of having fewer transistors and achieving high resolution.

[0038] In some embodiments, as shown in Figures 5 and 6, both the first-class pixel circuit 322 and the second-class pixel circuit 323 include a capacitor C. The capacitor C is connected between the first pole of the drive transistor T1 and the gate of the drive transistor T1. In this way, when the drive transistor T1 is turned on, the capacitor C ensures that the drive transistor T1 can stably drive the light emission of the light-emitting element 331.

[0039] As shown in Figures 1, 3, and 4, the external circuit 50 may further include an external processing circuit 51 connected to the drive unit 40. The external processing circuit 51 receives an electrical signal (sensing current or sensing voltage) when the drive transistor T1 in the second type pixel circuit 323 is turned on via the sensing line 327, converts the electrical signal from an analog signal to a digital signal, and then performs calculations to obtain the threshold voltage of the drive transistor T1 or a compensation value for the threshold voltage of the drive transistor T1. A storage unit (not shown) in the external processing circuit 51 stores the threshold voltage or compensation value, and then converts the threshold voltage or compensation value from a digital signal to an analog signal and transmits it to the drive unit 40. The drive unit 40 performs fine-tuning compensation on the threshold voltages of the drive transistor T1 in the first type pixel circuit 322 and the second type pixel circuit 323 based on the analog signal corresponding to one of the threshold voltage and compensation value and the brightness curve, thereby improving the brightness uniformity of the display panel 100. Here, the brightness curve is obtained by acquiring the display screen when the display panel displays and calculating the brightness difference of the display panel. Obtaining luminance curves is a common technique, so we will omit the explanation here.

[0040] In some embodiments, the external processing circuit 51 may include an analog-to-digital conversion circuit (not shown), a computing unit (not shown), a storage unit (not shown), and a digital-to-analog conversion circuit (not shown).

[0041] The analog-to-digital conversion circuit receives an electrical signal (sensing current or sensing voltage) when the drive transistor T1 in the second type pixel circuit 323 is turned on via the sensing line 327, and converts the electrical signal into a digital signal.

[0042] The calculation unit receives a digital signal output from an analog-to-digital conversion circuit and calculates the threshold voltage of the drive transistor T1 or a compensation value for the threshold voltage of the drive transistor T1 based on a predetermined data set and the digital signal. The predetermined data set may include data corresponding to a mapping relationship between a predetermined electrical signal and a predetermined threshold voltage, or data corresponding to a mapping relationship between a predetermined electrical signal and a predetermined compensation value.

[0043] The memory unit receives the threshold voltage or compensation value calculated by the calculation unit.

[0044] The digital-to-analog conversion circuit receives a threshold voltage or compensation value, converts that threshold voltage or compensation value into an analog signal, and outputs it to the drive unit 40.

[0045] The first type of pixel circuit 322 shown in Figure 5 includes two transistors and one capacitor, and the relatively small number of transistors in this first type of pixel circuit 322 can meet the requirement for high resolution. The second type of pixel circuit 323 shown in Figure 6 includes three transistors and one capacitor, and the relatively small number of transistors also meets the requirement for high resolution and enables external compensation for threshold voltage. By using a mixed design of the first type of pixel circuit 322 shown in Figure 5 and the second type of pixel circuit 323 shown in Figure 6, external compensation for the threshold voltage of the drive transistor T1 is realized, and there is more space to provide the pixel circuit 32 in the display panel 100, which in turn enables high resolution.

[0046] In related technologies, the pixel circuits in display panels typically use a single type of pixel circuit, making it difficult to achieve both high resolution and threshold voltage compensation. For example, glass-based organic light-emitting diode display panels typically use a 7T1C pixel circuit with internal compensation to achieve threshold voltage compensation and thereby improve brightness uniformity. However, the large number of transistors in this pixel circuit makes it difficult to achieve a pixel density of 1500 pixels or more per inch.

[0047] In some embodiments, for the first type pixel circuit 322 and the second type pixel circuit 323 shown in Figures 5 and 6, the second power supply voltage VDD and the first power supply voltage VSS may both be constant power supply voltage signals; that is, the second power supply voltage VDD and the first power supply voltage VSS are both constant.

[0048] In some other embodiments, for the first type pixel circuit 322 and the second type pixel circuit 323 shown in Figures 5 and 6, at least one of the second power supply voltage VDD and the first power supply voltage VSS can be varied so that the difference between the second power supply voltage VDD and the first power supply voltage VSS is variable. Different differences can control whether or not the drive transistor T1 is turned on. When the drive transistor T1 is turned on, the light-emitting element 331 emits light, and the display panel displays a screen with a certain brightness. When the drive transistor T1 is turned off, the display panel displays a black screen, i.e., the display panel has a black insertion function. Therefore, a mixed design of the first type pixel circuit 322 shown in Figure 5 and the second type pixel circuit 323 shown in Figure 6 can achieve high resolution of the display panel, external compensation of the threshold voltage, and a black insertion function.

[0049] In some other embodiments, when the drive transistor T1 is turned on, the difference between the second power supply voltage VDD and the first power supply voltage VSS is the first difference. When the drive transistor T1 is turned off, the difference between the second power supply voltage VDD and the first power supply voltage VSS is the second difference. The second difference is different from the first difference.

[0050] In some embodiments, the sensing transistor T4 further includes a gate, the gate of which receives the scanning signal Pscan transmitted by the scanning line 325. In this way, in each second-class pixel circuit 323, the gate of the sensing transistor T4 and the gate of the switching transistor T2 are connected to a single scanning line 325 that transmits the scanning signal Pscan, reducing the number of scanning lines, providing more space for the pixel circuits 321, and further improving the resolution of the display panel 100. Alternatively, in the direction of extension of the scanning line 325, the gates of the switching transistor T2 in the first-class pixel circuit 322 and the second-class pixel circuit 323 may also be connected to a single scanning line 325 that transmits the scanning signal Pscan, further reducing the number of scanning lines, providing more space for the pixel circuits 321, and further improving the resolution of the display panel 100.

[0051] In some other embodiments, in the second type pixel circuit 323, the gates of the sensing transistor T4 and the switching transistor T2 may each receive two different scanning signals. In this way, the sensing transistor T4 and the switching transistor T2 are controlled by different scanning signals and are controlled independently to better achieve the writing of the data signal Data and the detection of the threshold voltage.

[0052] Figure 7 is a circuit diagram showing a Class 1 pixel circuit according to some other embodiments of the present application. Figure 8 is a circuit diagram showing a Class 2 pixel circuit according to some other embodiments of the present application.

[0053] In some other embodiments, the first type pixel circuit shown in Figure 7 and the first type pixel circuit shown in Figure 5 are substantially identical, and the second type pixel circuit shown in Figure 8 and the second type pixel circuit shown in Figure 6 are substantially identical; the same parts will not be explained here. The difference is that both the first type pixel circuit 322 shown in Figure 7 and the second type pixel circuit 323 shown in Figure 8 include a light emission control transistor T3. The light emission control transistor T3 is used to control the light emission time of the light-emitting element 331. When the light emission control transistor T3 is turned on, the light-emitting element 331 emits light, and the display panel 100 displays a screen with a certain level of brightness. When the light emission control transistor T3 is turned off, the light-emitting element 331 does not emit light, and the display panel 100 displays a black screen; that is, the display panel 100 has a black insertion function.

[0054] In the first type pixel circuit 322 shown in Figure 7 and the second type pixel circuit 323 shown in Figure 8, both the second power supply voltage VDD and the first power supply voltage VSS may be constant power supply voltage signals.

[0055] In some embodiments, the light emission control transistor T3 may include a gate, a first pole, and a second pole. The gate of the light emission control transistor T3 receives a light emission control signal EM transmitted by the light emission control signal line 326. The first pole of the light emission control transistor T3 receives the second power supply voltage VDD. The second pole of the light emission control transistor T3 is connected to the second pole of the drive transistor T1. In this way, the first and second poles of the light emission control transistor T3 are connected between the second pole of the drive transistor T1 and the power signal line that transmits the second power supply voltage VDD, thereby reducing the power consumption during the operation of the first type of pixel circuit 322 and the second type of pixel circuit 321.

[0056] The first type of pixel circuit 322 shown in Figure 7 includes three transistors and one capacitor C. The relatively small number of transistors in this first type of pixel circuit 322 satisfies the requirement for high resolution and the black insertion function of the display panel. The second type of pixel circuit 323 shown in Figure 8 includes four transistors and one capacitor C. In this second type of pixel circuit 323, the driving transistor T1 detects a threshold voltage and the black insertion function of the display panel is also satisfied. In this way, the mixed design of the first type of pixel circuit 322 and the second type of pixel circuit 323 enables external compensation for the threshold voltage of the driving transistor T1, and also provides more space for the pixel circuit 321 in the display panel 100, thereby achieving high resolution.

[0057] Regarding the first-class pixel circuit 322 and the second-class pixel circuit 323 shown in Figures 7 and 8, a sensing transistor T4 is added to the second-class pixel circuit 323, and a light emission control transistor T3 is added to both the first-class pixel circuit 322 and the second-class pixels to realize external compensation for threshold voltage and black insertion function, as well as to improve the resolution of the display panel 100.

[0058] Furthermore, as can be seen in conjunction with Figures 5 to 8, the second-class pixel circuit 323 has a function to support the detection of an electrical signal corresponding to a threshold voltage, while the first-class pixel circuit 322 does not have a function to support the detection of an electrical signal corresponding to a threshold voltage. In addition, if the number of transistors in the first-class pixel circuit 322 is smaller than the number of transistors in the second-class pixel circuit 323, and the number of transistors in the second-class pixel circuit 323 is 4 or less, the display panel 100 can ensure that external compensation for the threshold voltage of the pixel circuit is implemented to improve the brightness uniformity of the display panel and to improve the resolution of the display panel.

[0059] To make it easier to understand, depending on other functional requirements of the display panel 100, several transistors may be added to the first-class pixel circuits 322 and the second-class pixel circuits 323. For example, an initialization transistor that initializes the gate of the drive transistor T1, or a reset transistor that initializes the anode of the light-emitting element 331, may be added. Of course, adding transistors will affect the resolution of the display panel 100 to some extent. In some embodiments, the area occupied by one first-class pixel circuit 322 is smaller than the area occupied by one second-class pixel circuit 323. In this way, the area occupied by the first-class pixel circuits 322 is reduced, providing more space for the pixel circuits 321 and thus improving the resolution of the display panel 100.

[0060] The area occupied by the Class 1 pixel circuit 322 is equal to the orthographic area of ​​the Class 1 pixel circuit 322 on the substrate 31. The area occupied by the Class 2 pixel circuit 323 is equal to the orthographic area of ​​the Class 2 pixel circuit 323 on the substrate 31. The orthographic area of ​​the Class 1 pixel circuit 322 on the substrate 31 may be equal to the sum of the orthographic areas of the multiple transistors in the Class 1 pixel circuit 322, the capacitor C, and the wiring connecting the multiple transistors and the capacitor C on the substrate 31. The orthographic area of ​​the Class 2 pixel circuit 323 on the substrate 31 is similar and will not be explained here.

[0061] As described above, the fact that the first-class pixel circuit 322 does not include a sensing transistor T4, while the second-class pixel circuit 323 includes a sensing transistor T4, is advantageous because the number of transistors in the first-class pixel circuit 322 is smaller than the number of transistors in the second-class pixel circuit 323, resulting in a smaller footprint for one first-class pixel circuit 322 than for one second-class pixel circuit 323.

[0062] In some embodiments, the number of first-class pixel circuits 322 in the display area 100a is greater than the number of second-class pixel circuits 323. In this way, the second-class pixel circuits 323, which have a relatively large footprint and are relatively few in number, detect the threshold voltage of the drive transistor T1 and realize external compensation for the threshold voltage, thereby giving the display panel 100 good brightness uniformity, while increasing the number of first-class pixel circuits 322, which have a relatively small footprint and are relatively numerous, allows the display panel 100 to have high resolution.

[0063] In the pixel circuits shown in Figures 5 to 8, in some embodiments, the drive transistor T1 in the first type pixel circuit 322 is the same as the drive transistor T1 in the second type pixel circuit 323, and / or the switching transistor T2 in the first type pixel circuit 322 is the same as the switching transistor T2 in the second type pixel circuit 323, and / or the light emission control transistor T3 in the first type pixel circuit 322 is the same as the light emission control transistor T3 in the second type pixel circuit 323. In this way, at least one transistor in the first type pixel circuit 322 is the same as the corresponding transistor in the second type pixel circuit 323, and the manufacturing process of the display panel 100 is simplified by manufacturing the transistors in the first type pixel circuit 322 and the second type pixel circuit 323 using the same manufacturing process.

[0064] In one specific embodiment, the drive transistor T1 in the Class 1 pixel circuit 322 is the same as the drive transistor T1 in the Class 2 pixel circuit 323, the switching transistor T2 in the Class 1 pixel circuit 322 is the same as the switching transistor T2 in the Class 2 pixel circuit 323, and the light emission control transistor T3 in the Class 1 pixel circuit 322 is the same as the light emission control transistor T3 in the Class 2 pixel circuit 323. In this way, the manufacturing process of the display panel 100 is further simplified. Also, since the drive transistor T1 in the Class 1 pixel circuit 322 is the same as the drive transistor T1 in the Class 2 pixel circuit 323, the threshold voltage or compensation value of the drive transistor T1 in the Class 2 pixel circuit 323 can be used to better compensate the threshold voltage of the drive transistor T1 in the Class 1 pixel circuit 322, thereby further improving the uniformity of the display brightness.

[0065] Furthermore, the fact that the drive transistor T1 in the Class 1 pixel circuit 322 is the same as the drive transistor T1 in the Class 2 pixel circuit 323 means that the type and size of the drive transistor T1 in the Class 1 pixel circuit 322 and the drive transistor T1 in the Class 2 pixel circuit 323 are the same. For example, both the drive transistor T1 in the Class 1 pixel circuit 322 and the drive transistor T1 in the Class 2 pixel circuit 323 are N-type low-temperature polysilicon transistors, and their dimensions may be approximately identical. Here, their dimensions are approximately identical, taking into account differences due to the manufacturing process. The switching transistor T2 in the Class 1 pixel circuit 322 is the same as the switching transistor T2 in the Class 2 pixel circuit 323, and the light emission control transistor T3 in the Class 1 pixel circuit 322 is the same as the light emission control transistor T3 in the Class 2 pixel circuit 323. By analogy, the explanation is omitted here.

[0066] In another specific embodiment, two transistors in the first class pixel circuit 322 may be the same as the two corresponding transistors in the second class pixel circuit 323, or one transistor in the first class pixel circuit 322 may be the same as the one corresponding transistor in the second class pixel circuit 323.

[0067] In the pixel circuits shown in Figures 5 to 8, in some embodiments, the drive transistor T1 in the first type of pixel circuit 322 and the drive transistor T1 in the second type of pixel circuit 323 both include low-temperature polysilicon transistors, and / or the switching transistor T2 in the first type of pixel circuit 322 and the switching transistor T2 in the second type of pixel circuit 323 both include low-temperature polysilicon transistors, and / or the light emission control transistor T3 in the first type of pixel circuit 322 and the light emission control transistor T3 in the second type of pixel circuit 323 both include low-temperature polysilicon transistors, and / or the sensing transistor T4 includes a low-temperature polysilicon transistor. In this way, at least one transistor in the first type of pixel circuit 322 and at least one transistor in the second type of pixel circuit 323 are low-temperature polysilicon transistors with a relatively small footprint, which is advantageous in further reducing the footprint occupied by one pixel circuit 321 and increasing the number of pixel circuits 321, and the display panel 100 can achieve high resolution.

[0068] In one specific embodiment, the drive transistor T1 in the first type of pixel circuit 322 and the drive transistor T1 in the second type of pixel circuit 323 both include low-temperature polysilicon transistors, the switching transistor T2 in the first type of pixel circuit 322 and the switching transistor T2 in the second type of pixel circuit 323 both include low-temperature polysilicon transistors, the light emission control transistor T3 in the first type of pixel circuit 322 and the light emission control transistor T3 in the second type of pixel circuit 323 both include low-temperature polysilicon transistors, and the sensing transistor T4 includes a low-temperature polysilicon transistor. In this way, it is advantageous to further reduce the area occupied by one pixel circuit 321 and increase the number of pixel circuits 321, and the display panel 100 can achieve high resolution.

[0069] In some other embodiments, at least one of the drive transistor T1 in the Class 1 pixel circuit 322 and the drive transistor T1 in the Class 2 pixel circuit 323 may include a metal oxide transistor. In some other embodiments, at least one of the switching transistor T2 in the Class 1 pixel circuit 322 and the switching transistor T2 in the Class 2 pixel circuit 323 may include a metal oxide transistor. In some other embodiments, at least one of the light emission control transistor T3 in the Class 1 pixel circuit 322 and the light emission control transistor T3 in the Class 2 pixel circuit 323 may include a metal oxide transistor. In some other embodiments, the sensing transistor T4 may also include a metal oxide transistor.

[0070] In the pixel circuits shown in Figures 5 to 8, in some embodiments, the drive transistor T1 in the first type pixel circuit 322 and the drive transistor T1 in the second type pixel circuit 323 are N-type transistors, and / or the switching transistor T2 in the first type pixel circuit 322 and the switching transistor T2 in the second type pixel circuit 323 are P-type transistors, and / or the light emission control transistor T3 in the first type pixel circuit 322 and the light emission control transistor T3 in the second type pixel circuit 323 are P-type transistors, and / or the sensing transistor T4 in the second type pixel circuit 323 is a P-type transistor.

[0071] In one specific embodiment, both the drive transistor T1 in the first type pixel circuit 322 and the drive transistor T1 in the second type pixel circuit 323 are N-type transistors. This facilitates the detection and compensation of the threshold voltage of the drive transistor T1.

[0072] In one specific embodiment, the switching transistor T2 in the first type pixel circuit 322 and the switching transistor T2 in the second type pixel circuit 323 are P-type transistors. The light emission control transistor T3 in the first type pixel circuit 322 and the light emission control transistor T3 in the second type pixel circuit 323 are P-type transistors. The sensing transistor T4 in the second type pixel circuit 323 is a P-type transistor. In this way, the power consumption of the switching transistor T2, the light emission control transistor T3, and the sensing transistor T4 is reduced.

[0073] In some embodiments, as shown in Figures 3 and 4, a plurality of pixel circuits 321 are divided into a plurality of pixel circuit groups 324 arranged in an array, and one pixel circuit group 324 includes at least one Class 2 pixel circuit 323 and a plurality of Class 1 pixel circuits 322. The display area 100a of the display panel 100 is divided into a plurality of display sub-areas SA arranged in an array, and one pixel circuit group 324 is provided in one display sub-area SA. In this way, the Class 1 pixel circuits 322 and Class 2 pixel circuits 323 cooperate with each other to achieve coarse compensation for threshold voltage and improve the brightness uniformity of the display sub-area SA, and one pixel circuit group 324 may also be a compensation unit for the minimum threshold voltage.

[0074] Making one pixel circuit group 324 the minimum threshold voltage compensation unit means that threshold voltage compensation is performed for both the multiple first-class pixel circuits 322 and the drive transistor T1 of at least one second-class pixel circuit 323 in the pixel circuit group 324, based on an electrical signal corresponding to the threshold voltage of the drive transistor T1 detected by at least one second-class pixel circuit 323 in the pixel circuit group 324.

[0075] The pixel circuit group 324 is arranged in an array in the display area 100a as the smallest overlapping unit in the pixel driving circuit. Furthermore, in the display area 100a, the more pixel circuit groups 324 there are, the fewer pixel circuits 321 there are in each pixel circuit group 324. As a result, each pixel circuit group 324 can achieve greater resolution threshold voltage compensation, and the brightness uniformity of the display sub-area SA corresponding to the pixel circuit group 324 can be further improved.

[0076] In some embodiments, the number of Class 2 pixel circuits 323 in a single pixel circuit group 324 is smaller than the number of Class 1 pixel circuits 322. In this way, electrical signals can be detected based on the relatively small number of Class 2 pixel circuits 323, and the threshold voltage of the drive transistor T1 of multiple pixel circuits in a single pixel circuit group 324 can be compensated based on the electrical signals. At the same time, the resolution of the display panel 100 can be improved based on the relatively large number of Class 1 pixel circuits 322.

[0077] In some embodiments, the multiple pixel circuit groups 324 may be arranged in a two-dimensional array in the display area 100a, for example, extending along the direction of extension of the data lines 328 (second direction y) and the direction of extension of the scan lines 325 (first direction x), thereby simplifying the design of the wiring connected to the pixel circuit 321. When the multiple pixel circuit groups 324 are arranged in a two-dimensional array, the multiple display sub-areas SA corresponding to the multiple pixel circuit groups 324 may also be arranged in a two-dimensional array.

[0078] In some other embodiments, the multiple pixel circuits 321 may be arranged in a one-dimensional array, for example, extending along the direction of the data lines 328 or the direction of the scan lines 325. If the multiple pixel circuit groups 324 are arranged in a one-dimensional array, the multiple display sub-regions SA corresponding to the multiple pixel circuit groups 324 may also be arranged in a one-dimensional array.

[0079] In a single pixel circuit group 324, the number of Class 2 pixel circuits 323 affects the resolution of the display panel 100 and the effectiveness of threshold voltage compensation. Specifically, the more Class 2 pixel circuits 323 there are in a single pixel circuit group 324, the more electrical signals corresponding to the sensing threshold voltage can be generated, and more accurate compensation can be achieved based on electrical signals corresponding to multiple threshold voltages. However, a large number of Class 2 pixel circuits 323 is disadvantageous in reducing the footprint occupied by a single pixel circuit group 324, and consequently, is disadvantageous in improving the resolution of the display panel 100. Furthermore, in a single pixel circuit group 324, the position of the Class 2 pixel circuits 323 also affects the effectiveness of threshold voltage compensation. Specifically, due to differences in the manufacturing process related to different positions, there are also differences in the threshold voltage of the drive transistor T1 in Class 2 pixel circuits 323 at different positions. Based on this, some embodiments of the present invention have optimized the number and position of Class 2 pixel circuits 323 in a single pixel circuit group 324.

[0080] In some embodiments, in a pixel circuit group 324, one Class 2 pixel circuit 323 is located between two adjacent Class 1 pixel circuits 322. In this way, the effect of differences in the manufacturing process on the threshold voltage of the drive transistor T1 in the Class 2 pixel circuit 323 is the same as or approximately the same as the effect of differences in the manufacturing process on the threshold voltage of the drive transistor T1 in two adjacent Class 1 pixel circuits 322. When compensation is performed on the threshold voltage of the drive transistor T1 in two adjacent Class 1 pixel circuits 322 using an electrical signal corresponding to the sensing threshold voltage in the Class 2 pixel circuit 323, a better threshold voltage compensation effect can be obtained, and the brightness uniformity of the display sub-region SA corresponding to a single pixel circuit group 324 can be improved.

[0081] In one specific embodiment, as shown in Figures 3 and 4, in a pixel circuit group 324, multiple Class 1 pixel circuits 322 are arranged surrounding one Class 2 pixel circuit 323. In this way, the threshold voltage of the drive transistor T1 in one Class 2 pixel circuit 323 is approximately the same as the threshold voltage of the drive transistor T1 of the multiple Class 1 pixel circuits 322 surrounding this Class 2 pixel circuit 323. Based on the electrical signal corresponding to the threshold voltage detected by one Class 2 pixel circuit 323, the threshold voltages of the drive transistors T1 in the multiple Class 1 pixel circuits 322 are compensated, reducing the area occupied by the pixel circuit group 324 and the number of electrical signals corresponding to the threshold voltages that need to be sensed, thereby simplifying the structure of the external processing circuit 51 connected to the sensing line 327, and consequently simplifying the manufacturing process of the display panel 100.

[0082] In some embodiments, as shown in Figures 3 and 4, one pixel circuit group 324 may have only one type 2 pixel circuit 323. In this way, the number of type 2 pixel circuits 323 in one pixel circuit group 324 is minimized, while the number of type 1 pixel circuits 322 is maximized. This reduces the area occupied by one pixel circuit group 324, thereby allowing for more pixel circuit groups 324 to be provided and improving resolution, while also simplifying the method for compensating the threshold voltage of the pixel circuits 321 in one pixel circuit group 324.

[0083] In some other embodiments, two or more Class II pixel circuits 323 may be provided in one pixel circuit group 324. Based on the electrical signals corresponding to the threshold voltage of the drive transistor T1 in the two or more Class II pixel circuits 323, a more accurate compensation value can be obtained, external compensation for the threshold voltage can be better realized, and the brightness uniformity of the display sub-region SA where the one pixel circuit group 324 is located can be better improved.

[0084] In some embodiments, the arrangement positions of the second type of pixel circuit 323 are the same in at least two pixel circuit groups 324, thereby simplifying the manufacturing process for multiple pixel circuit groups 324 and simplifying the arrangement method for the sensing lines 327.

[0085] Optionally, in the direction of the extension of the data line 328, the arrangement positions of the second type pixel circuits 323 in at least two pixel circuit groups 324 are the same. In this way, the manufacturing process for multiple pixel circuit groups 324 is simplified, and in the direction of the extension of the data line 328, it is made easier for the second type pixel circuits 323 in at least two pixel circuit groups 324 to be connected to a single sensing line 327, thereby reducing the number of sensing lines 327, increasing the space for pixel circuits, and improving the resolution of the display panel 100.

[0086] Optionally, in the direction of the extension of the scan line 325, the arrangement positions of the second type of pixel circuit 323 in at least two pixel circuit groups 324 are the same, thereby simplifying the manufacturing process for multiple pixel circuit groups 324.

[0087] As an example, as shown in Figures 3 and 4, in the direction of extension of the data line 328 and the scanning line 325, the second type of pixel circuit 323 in the multiple pixel circuit groups 324 is located at the central position of each pixel circuit group 324.

[0088] To make it easier to understand, the second type of pixel circuit 323 in the pixel circuit group 324 may be located at positions other than the central position of each pixel circuit group 324, for example, at the edge position of the display sub-region SA.

[0089] Furthermore, if the number of Type 2 pixel circuits 323 in each pixel circuit group 324 is two or more, the positions of the Type 2 pixel circuits 323 in multiple pixel circuit groups 324 may be the same.

[0090] In some other embodiments, the arrangement positions of the second type pixel circuits 323 in at least two pixel circuit groups 324 may differ, and the arrangement positions of multiple second type pixel circuits 323 in the display area 100a can be made irregular. Based on multiple electrical signals detected by the second type pixel circuits 323 at different positions in at least two pixel circuit groups 324, compensation can be performed on the threshold voltage of the drive transistor T1 of the pixel circuits in at least two pixel circuit groups 324 to further improve the brightness uniformity of the display area 100a.

[0091] Optionally, in the direction of the extension of the data line 328 and / or the direction of the extension of the scan line 325, the second type of pixel circuits 323 in at least two pixel circuit groups 324 are offset from each other.

[0092] As an example, in the direction of extension of the scan line 325, the second type of pixel circuits 323 in at least two pixel circuit groups 324 are offset from each other.

[0093] In some embodiments, as shown in Figure 3, the sensing transistors T4 of at least two Class II pixel circuits 323 located in adjacent pixel circuit groups 324 in the direction of the data line 328's extension, i.e., in the second direction y, are aligned and connected to a single sensing line 327. In this way, the aligned sensing transistors T4 located in adjacent pixel circuit groups 324 in the direction of the data line 328's extension can share a single sensing line 327, thereby reducing the number of sensing lines 327, reducing the area occupied by the sensing lines 327, providing more space for more pixel circuits 321, and further improving the resolution of the display panel 100. For example, the sensing transistors T4 of four Class II pixel circuits 323 in four adjacent pixel circuit groups 324 in the direction of the data line 328's extension are aligned and connected to a single sensing line 327. In some other embodiments, as shown in Figure 4, the sensing transistors T4 of at least two second-class pixel circuits 323 located in adjacent pixel circuit groups 324 in the direction of the extension of the data line 328 are aligned and connected to at least two different sensing lines 327, respectively. In this way, the aligned sensing transistors T4 located in adjacent pixel circuit groups 324 in the direction of the extension of the data line 328 can independently collect the electrical signal when the drive transistor T1 is turned on using different sensing lines 327. For example, in the direction of extension of the data line 328, the sensing transistors T4 of the four Class 2 pixel circuits 323 in four adjacent pixel circuit groups 324 (Class 2 pixel circuits 323a, 323b, 323c, and 323d) are each connected to four different sensing lines 327 (sensing line 327a, 327b, 327c, and 327d).

[0094] In some embodiments, as shown in Figures 3 and 4, the sensing transistors T4 of at least two second-class pixel circuits 323 located in adjacent pixel circuit groups 324 in the direction of the extension of the scan line 325, i.e., in the first direction x, are aligned.

[0095] In some embodiments, as shown in Figures 3 and 4, a first-class pixel circuit 322 is provided between two second-class pixel circuits 323 located in adjacent pixel circuit groups 324. For example, in the extending direction of the data line 328 and the extending direction of the scan line 325, a first-class pixel circuit 322 is provided between two second-class pixel circuits 323 located in adjacent pixel circuit groups 324.

[0096] In some other embodiments, two Class II pixel circuits 323 located in adjacent pixel circuit groups 324 may be provided adjacent to each other. For example, two Class II pixel circuits 323 located in adjacent pixel circuit groups 324 may be provided adjacent to each other along the edges of adjacent display sub-regions SA. Note that the connection point CP in Figures 3 and 4 indicates that the sensing line 327 is connected to the sensing transistor T4.

[0097] The following describes the operation process of the Type 2 pixel circuit 323, along with its driving timing.

[0098] Figure 9 is a drive timing diagram for the second type pixel circuit shown in Figure 8. The operation process for the second type pixel circuit 323 includes an external detection period t1 for the threshold voltage, a data writing period t2 for the data voltage, and an emission period t3.

[0099] During the external detection period t1 of the threshold voltage, the light emission control signal EM is a low-level voltage, the scan signal Pscan is a low-level voltage, the data signal Data is a reference voltage, and the first power supply voltage VSS and the second power supply voltage VSS are different constant voltages. The drive transistor T1 and the switching transistor T2 are turned on, the light emission control transistor T3 and the sensing transistor T4 are turned on, and the sensing line 327 outputs the sensing current output from the first pole of the drive transistor T1 to the external processing circuit 51, which calculates the threshold voltage of the drive transistor T1 based on this sensing current. Subsequently, the drive unit 40 obtains a threshold voltage compensation value based on the threshold voltage of the drive transistor T1 and the brightness curve.

[0100] During the data voltage writing period t2, the light emission control signal EM is a high-level voltage, the scan signal Pscan is a low-level voltage, and the data signal Data is a compensated data voltage, which is obtained based on the compensation value and the initial data voltage. The switching transistor T2 is turned on, the light emission control transistor T3 is turned off, the drive transistor T1 is turned off, and the compensated data voltage is written to the gate of the drive transistor T1.

[0101] During the light emission period t3, the light emission control signal EM is a low-level voltage, the scanning signal Pscan is a high-level voltage, and the data signal Data is a low-level voltage. The switching transistor T2 and the sensing transistor T4 are turned off, the light emission control transistor T3 and the drive transistor T1 are turned on, and the light-emitting element 331 emits light.

[0102] In some embodiments, the external detection period t1 of the threshold voltage may precede the frame screen display period (including the data voltage writing period t2 and the light emission period t3). Based on the threshold voltage detected once, a compensation value corresponding to the threshold voltage is compensated for the data voltage writing period t2 of multiple frame screens.

[0103] The operation process of the Class 1 pixel circuit 322 is substantially the same as that of the Class 2 pixel circuit 323, the only similarity being that the operation process of the Class 1 pixel circuit 322 also includes a data voltage writing period t2 and an illumination period t3. The data voltage writing period t2 and illumination period t3 of the Class 1 pixel circuit 322 can be described by referring to the corresponding period descriptions in the Class 2 pixel circuit 323, and are omitted here. The difference is that the operation process of the Class 1 pixel circuit 322 does not include the threshold voltage external detection period t1 described above. Based on the same inventive concept, this application further provides a display device, which includes the display panel 100 described above. The display device can be applied to electronic devices such as virtual reality products, televisions, watches, mobile phones, and tablets.

[0104] As described above, in the display panel and display device according to some embodiments of the present application, the plurality of pixel circuits include Class 1 pixel circuits and Class 2 pixel circuits. The Class 2 pixel circuit includes a sensing transistor that can detect the threshold voltage of the transistor, while the Class 1 pixel circuit does not include this sensing transistor. The detected threshold voltage can be used to compensate the Class 1 and Class 2 pixel circuits for the threshold voltage, thereby improving the brightness uniformity of the display panel. At the same time, the Class 1 pixel circuit does not include this sensing transistor, which reduces the number of transistors in the Class 1 pixel circuit, reduces the area occupied by the Class 1 pixel circuit, increases the number of pixel circuits, and enables high-resolution display in the display panel and display device. In other words, by designing a mixed combination of Class 1 and Class 2 pixel circuits, it is possible to achieve both high resolution and brightness uniformity in the display panel and display device.

[0105] The above descriptions of the embodiments are merely intended to aid in understanding the technical proposal of this application and its core concept. Those skilled in the art may modify the technical proposals described in the embodiments described above, or substitute some of their technical features with equivalent ones, but it should be understood that these modifications or substitutions do not cause the essence of the corresponding technical proposal to deviate from the scope of the technical proposals of the various embodiments of this application. [Explanation of Symbols]

[0106] 100: Display Panel 100a:Display area SA: Display sub-area 100b: Hidden area CP: Connection point 31: Circuit board 32: Drive circuit layer 321: Pixel Circuit 322: Pixel circuits of type 1 323, 323a, 323b, 323c, 323d: Pixel circuits of type 2 324: Pixel circuit group T1: Drive transistor T2: Switching transistor T3: Light emission control transistor T4: Sensing Transistor C: Capacitor 325: Scan lines 326: Light control signal line 327, 327a, 327b, 327c, 327d: Sensing lines 328: Data line 33: Light-emitting element layer 331: Light-emitting element 34: Thin film encapsulation layer 40: Drive Unit 50: External circuit 51: External processing circuit Data: Data signal Pscan: Scanning signal EM: Light emission control signal VSS: First power supply voltage VDD: Second power supply voltage x: 1st direction y: Second direction

Claims

1. A display panel having a display area, wherein the display panel is Multiple light-emitting elements located in the aforementioned display area, The display area includes a first type of pixel circuit and a second type of pixel circuit located therein and connected to a plurality of the light-emitting elements, wherein both the first type of pixel circuit and the second type of pixel circuit include a plurality of pixel circuits including a drive transistor, A sensing line connected to the drive transistor of the second type of pixel circuit, which receives an electrical signal output from the turned-on drive transistor in the second type of pixel circuit, Includes an external circuit connected to the sensing line and configured to acquire the electrical signal, Display panel.

2. The number of transistors in the first type of pixel circuit is smaller than the number of transistors in the second type of pixel circuit, and the number of transistors in the second type of pixel circuit is 4 or less. The display panel according to claim 1.

3. The area occupied by one of the aforementioned Class 1 pixel circuits is smaller than the area occupied by one of the aforementioned Class 2 pixel circuits. The display panel according to claim 1.

4. In the display area, the number of pixel circuits of type 1 is greater than the number of pixel circuits of type 2. The display panel according to claim 1.

5. The plurality of pixel circuits are divided into a plurality of pixel circuit groups arranged in an array, and one of the pixel circuit groups includes at least one of the second type of pixel circuit and a plurality of the first type of pixel circuit. The display panel according to claim 1.

6. In one pixel circuit group, one of the second type pixel circuits is provided between two adjacent first type pixel circuits. The display panel according to claim 5.

7. In one pixel circuit group, a plurality of the first type of pixel circuit groups are arranged surrounding one of the second type of pixel circuit. The display panel according to claim 5.

8. The arrangement positions of the second type of pixel circuits in at least two of the aforementioned pixel circuit groups are the same. The display panel according to claim 5.

9. Each of the light-emitting elements includes an anode and a cathode that receives a first power supply voltage. The drive transistor includes a gate, a first pole, and a second pole, the first pole of the drive transistor being connected to the anode of the light-emitting element, and the second pole of the drive transistor receiving a second power supply voltage, the second power supply voltage being different from the first power supply voltage. Both the pixel circuits of the first class and the pixel circuits of the second class are, A switching transistor including a first pole and a second pole, further comprising a switching transistor in which the first pole of the switching transistor receives a data signal and the second pole of the switching transistor is connected to the gate of the drive transistor, Here, the pixel circuit of the second class further includes a sensing transistor, the sensing transistor includes a first pole and a second pole, and the first and second poles of the sensing transistor are connected between the first pole of the driving transistor and the sensing line in the pixel circuit of the second class. The display panel according to claim 1.

10. Both the pixel circuits of the first class and the pixel circuits of the second class are, A light-emitting control transistor comprising a first pole, a second pole, and a gate, wherein the gate of the light-emitting control transistor receives a light-emitting control signal, the first pole of the light-emitting control transistor receives the second power supply voltage, and the second pole of the light-emitting control transistor is connected to the second pole of the drive transistor, The further includes a capacitor connected between the first pole of the drive transistor and the gate of the drive transistor, The display panel according to claim 9.

11. The plurality of pixel circuits are divided into a plurality of pixel circuit groups arranged in an array, and one of the pixel circuit groups includes at least one of the second type of pixel circuit and a plurality of the first type of pixel circuit. The aforementioned display panel is The system further includes a plurality of data lines used to transmit the data signals, each connected to the first pole of the switching transistor in the first type of pixel circuit and the second type of pixel circuit, In the direction of the extension of the data line, the sensing transistors in at least two of the second type of pixel circuits, each located in an adjacent group of pixel circuits, are aligned and connected to a single sensing line. The display panel according to claim 9.

12. The plurality of pixel circuits are divided into a plurality of pixel circuit groups arranged in an array, and one of the pixel circuit groups includes at least one of the second type of pixel circuit and a plurality of the first type of pixel circuit. The aforementioned display panel is The system further includes a plurality of data lines used to transmit the data signals, each connected to the first pole of the switching transistor in the first type of pixel circuit and the second type of pixel circuit, In the direction of the extension of the data line, the sensing transistors in at least two second-class pixel circuits located in adjacent groups of pixel circuits are aligned and connected to at least two different sensing lines, respectively. The display panel according to claim 9.

13. The first power supply voltage and the second power supply voltage are different constant voltages. The display panel according to claim 9.

14. When the drive transistor is turned on, the difference between the second power supply voltage and the first power supply voltage is the first difference. When the drive transistor is turned off, the difference between the second power supply voltage and the first power supply voltage is the second difference, and the second difference is different from the first difference. The display panel according to claim 9.

15. The sensing transistor further includes a gate for receiving a scanning signal, and the switching transistors in the first type of pixel circuit and the second type of pixel circuit further include a gate for receiving the scanning signal. The display panel according to claim 9.

16. The drive transistor in the first type of pixel circuit is the same as the drive transistor in the second type of pixel circuit, and / or The switching transistor in the first type of pixel circuit is the same as the switching transistor in the second type of pixel circuit. The display panel according to claim 9.

17. The drive transistor in the first type of pixel circuit and the drive transistor in the second type of pixel circuit both include a low-temperature polysilicon transistor and / or The switching transistor in the pixel circuit of the first class and the switching transistor in the pixel circuit of the second class both include a low-temperature polysilicon transistor and / or The sensing transistor in the second type of pixel circuit includes a low-temperature polysilicon transistor. The display panel according to claim 9.

18. The drive transistor in the first type of pixel circuit and the drive transistor in the second type of pixel circuit are N-type transistors, and / or The switching transistor in the pixel circuit of the first class and the switching transistor in the pixel circuit of the second class are P-type transistors, and / or The sensing transistor in the second type of pixel circuit is a P-type transistor. The display panel according to claim 9.

19. Includes a display panel, the display panel is Multiple light-emitting elements located in the display area, The display area includes a first type of pixel circuit and a second type of pixel circuit located therein and connected to a plurality of the light-emitting elements, wherein both the first type of pixel circuit and the second type of pixel circuit include a plurality of pixel circuits including a drive transistor, A sensing line connected to the drive transistor of the second type of pixel circuit, which receives an electrical signal output from the turned-on drive transistor in the second type of pixel circuit, Includes an external circuit connected to the sensing line and configured to acquire the electrical signal, Display device.

20. Each of the light-emitting elements includes an anode and a cathode that receives a first power supply voltage. The drive transistor includes a gate, a first pole, and a second pole, the first pole of the drive transistor being connected to the anode of the light-emitting element, and the second pole of the drive transistor receiving a second power supply voltage, the second power supply voltage being different from the first power supply voltage. Both the pixel circuits of the first class and the pixel circuits of the second class are, A switching transistor including a first pole and a second pole, further comprising a switching transistor in which the first pole of the switching transistor receives a data signal and the second pole of the switching transistor is connected to the gate of the drive transistor, Here, the pixel circuit of the second class further includes a sensing transistor, the sensing transistor includes a first pole and a second pole, and the first and second poles of the sensing transistor are connected between the first pole of the driving transistor and the sensing line in the pixel circuit of the second class. The display device according to claim 19.

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