Display panel and display device

Abstract

The present application relates to a display panel and a display device. The display panel comprises: a plurality of pixel driving circuits. The plurality of pixel driving circuits are used for driving corresponding pixels to emit light. Each pixel driving circuit comprises a driving transistor, the driving transistor being used for controlling a pixel driving current supplied to a pixel. The driving transistor comprises an active layer, the active layer comprising a first active portion and a second active portion which are in communication with each other. The first active portion comprises a first sub-active portion and a second sub-active portion. On a plane where the active layer is located, the first sub-active portion and the second sub-active portion are located on two opposite sides of the second active portion. In a direction from the first sub-active portion to the second sub-active portion, the cross-sectional width of the first active portion is smaller than that of the second active portion. The active layer further comprises a plurality of compensation portions. The compensation portions are in communication with both the first active portion and the second active portion, and the compensation portions are located at an included angle formed between at least part of the first active portion and second active portion.

Description

Display panel and display device Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the continuous development of display technology, display panels are increasingly being used in various production and daily life scenarios. Organic light-emitting diode (OLED) display panels, in particular, have gained popularity in a wide range of applications due to their excellent display properties. Currently, when controlling the drive circuits of OLED display panels, transistors using IGZO technology are often used to enhance the display quality of OLED display panels.

[0003] In pixel driver circuits using IGZO transistors, the driver transistor (DTFT) directly controls the drive current delivered to the pixel, significantly impacting the pixel's display. However, driver transistors made from oxides are prone to forward bias, making it difficult for the pixel to illuminate. Summary of the Invention

[0004] According to a first aspect of an embodiment of the present application, there is provided a display panel, comprising: a plurality of pixel driving circuits;

[0005] The plurality of pixel driving circuits are used to drive corresponding pixels to emit light; the pixel driving circuits include a driving transistor, and the driving transistor is used to control the pixel driving current supplied to the pixel;

[0006] The driving transistor includes an active layer, the active layer including a first active portion and a second active portion that are interconnected; the first active portion includes a first sub-active portion and a second sub-active portion; on a plane where the active layer is located, the first sub-active portion and the second sub-active portion are located on opposite sides of the second active portion; and in a direction from the first sub-active portion to the second sub-active portion, a cross-sectional width of the first active portion is smaller than a cross-sectional width of the second active portion;

[0007] The active layer further includes a plurality of compensation portions; the compensation portions are connected to the first active portion and the second active portion at the same time, and the compensation portions are located at an angle formed by at least a portion of the first active portion and the second active portion.

[0008] In some embodiments, the shape of the compensation portion includes a quasi-triangle; the quasi-triangle includes a first-type side and two second-type sides, and the length of the second-type sides is smaller than the first-type sides; the compensation portion is connected to the first active portion and the second active portion through the two second-type sides respectively.

[0009] In some embodiments, the two second-type edges include a second edge connecting the compensation portion with the first active portion, and a third edge connecting the compensation portion with the second active portion; a ratio of the third edge to the second edge is greater than or equal to 0.5.

[0010] In some embodiments, the length of the second side is greater than or equal to 1.7 microns; the length of the third side is greater than or equal to 1.7 microns and less than or equal to 5.8 microns.

[0011] In some embodiments, the shape of the first-type side of the plurality of compensation portions includes at least one of a straight line, an inwardly concave arc, and an outwardly convex arc.

[0012] In some embodiments, the shape of the compensation portion further includes a rectangle; the compensation portion is connected to the first active portion and the second active portion through two adjacent sides of the rectangle.

[0013] In some embodiments, the rectangle includes a first rectangular side and a second rectangular side adjacent to each other; the compensation portion is connected to the first active portion through the first rectangular side, and is connected to the second active portion through the second rectangular side;

[0014] The first rectangular side has the same length as that of the first sub-active portion or the second sub-active portion, and the second rectangular side has the same length as that from a side edge of the first active portion to a side edge of the second active portion.

[0015] In some embodiments, the length of the first rectangular side is greater than or equal to 1.7 microns; the length of the second rectangular side is greater than or equal to 1.7 microns and less than or equal to 5.8 microns.

[0016] In some embodiments, the shape of the compensation portion further includes a polygon; the polygon includes a broken line edge and two adjacent fixed edges, and the compensation portion is connected to the first active portion and the second active portion through the two fixed edges respectively.

[0017] According to a second aspect of the present application, a display device is provided, comprising any one of the above-mentioned display panels.

[0018] According to the above embodiments, it can be seen that through the above settings, the movement distance of the carriers from the first active portion to the second active portion can be reduced, and by compensating the carriers at the first active portion and the second active portion, the accumulation of carriers at the junction of the first active portion and the second active portion can be effectively reduced, and then, the driving transistor can be made less likely to be forward biased, and the difficulty of lighting up the pixels electrically connected to the driving transistor can be further reduced, and the pixel driving voltage can be reduced, and the overall power consumption of the display panel can be further reduced.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] FIG1 is a top view of a driving transistor according to an embodiment of the present application.

[0022] FIG. 2 is a partially enlarged view of the active layer in FIG. 1 according to an embodiment of the present application.

[0023] FIG3 is a top view of another active layer according to an embodiment of the present application.

[0024] FIG4 is a top view of another active layer according to an embodiment of the present application.

[0025] FIG5 is a top view of another active layer according to an embodiment of the present application.

[0026] FIG6 is a top view of another driving transistor according to an embodiment of the present application.

[0027] FIG. 7 is a partially enlarged view of the active layer in FIG. 6 according to an embodiment of the present application.

[0028] FIG8 is a top view of another driving transistor according to an embodiment of the present application.

[0029] FIG9 is a partially enlarged view of the active layer in FIG8 according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0031] The driving transistor currently used in pixel driving circuits directly controls the pixel current supplied to the pixel to drive the pixel to emit light. Therefore, its performance is crucial to the effectiveness of driving the pixel to emit light. However, current driving transistors, especially those made of oxide materials, have a large number of free holes in their active layers. Due to the large number of free holes in the active layer, the transistor has the characteristic of easily generating a forward bias. When the transistor is forward biased, it will make it difficult for the pixel to light up, resulting in an increase in the pixel voltage driving the pixel and an increase in the power consumption of the display panel. This problem still needs to be solved urgently.

[0032] In order to solve the aforementioned problem, an embodiment of the present application provides a display panel. The display panel includes: a plurality of pixel driving circuits.

[0033] Multiple pixel drive circuits are used to drive corresponding pixels to emit light. The pixel drive circuit includes a drive transistor 10. Figure 1 shows a top view of the drive transistor 10. The structure of the drive transistor 10 can be referred to as shown in Figure 1. The drive transistor 10 is used to control the pixel drive current supplied to the pixel.

[0034] The driving transistor 10 includes an active layer 11. FIG2 shows an enlarged partial view of the active layer 11 in FIG1 . The structure of the active layer 11 can be referred to as shown in FIG2 . The active layer 11 includes a first active portion 111 and a second active portion 112 that are interconnected. The first active portion 111 includes a first sub-active portion 1111 and a second sub-active portion 1112. On the plane of the active layer 11, the first sub-active portion 1111 and the second sub-active portion 1112 are located on opposite sides of the second active portion 112.

[0035] Furthermore, in the direction from the first sub-active portion 1111 to the second sub-active portion 1112, the cross-sectional width of the first active portion 111 is smaller than the cross-sectional width of the second active portion 112. Specifically, as shown in FIG2 , the transverse width of the first active portion 111 is width W1, and the cross-sectional width of the second active portion 112 is width W2. The cross-sectional width of the first active portion 111 is smaller than the cross-sectional width of the second active portion 112, that is, width W1 is smaller than width W2.

[0036] The active layer 11 also includes a plurality of compensation portions 113. The compensation portions 113 are connected to both the first active portion 111 and the second active portion 112, and are located at the angle formed by at least a portion of the first active portion 111 and the second active portion 112. The compensation portions 113 are located at the angle formed by at least a portion of the first active portion 111 and the second active portion 112, that is, the compensation portions 113 can be located at the angle formed by a portion of the first active portion 111 and the second active portion 112, or can be located at the angle formed by all of the first active portions 111 and the second active portion 112.

[0037] Specifically, Figures 2 and 3 respectively show top views of two types of active layers 11. For example, the compensation portion 113 is located at the angle formed by all first active portions 111 and second active portions 112, as shown in Figure 2 ; for the compensation portion 113 is located at the angle formed by some first active portions 111 and second active portions 112, as shown in Figure 3 .

[0038] It should be noted that Figure 3 only shows a more possible embodiment in which the compensation portion 113 is located at the angle formed by part of the first active portion 111 and the second active portion 112, but in other embodiments it is not limited to this. The compensation portion 113 can also be located at the angle formed by part of the first active portion 111 and the second active portion 112 in other ways.

[0039] It should also be noted that the first active portion 111, the second active portion 112 and the compensation portion 113 are only parts of the active layer 11 divided for the convenience of explanation, but in fact, the various parts of the active layer 11 can be a whole, that is, the first active portion 111, the second active portion 112 and the compensation portion 113 can be formed as a whole.

[0040] When the compensation portion 113 is not provided, where the first active portion 111 is connected to the second active portion 112, the side wall of the first active portion 111 will form an angle close to a right angle with the second active portion 112. Referring to the content shown in Figure 2, Figure 2 shows the side C1 of the first sub-active portion 1111 and the connecting side L1 of the second active portion 112 on the side connected to the first sub-active portion 1111. An angle close to a right angle is formed between the side C1 and the connecting arm L1. After the channel is formed in the active layer 11, when the carriers move from the first active portion 111 to the junction of the first active portion 111 and the second active portion 112, some of the carriers need to move along the right-angled side close to a right angle in order to enter the channel in the second active portion 112 and move. This will undoubtedly increase the movement distance of some carriers, and make it impossible for the carriers to pass through the junction of the first active part 111 and the second active part 112 in time and smoothly, resulting in accumulation, making the driving transistor 10 prone to forward bias, and further making it difficult for the pixels electrically connected to the driving transistor 10 to light up, and the pixel driving voltage increases, which further leads to an increase in the overall power consumption of the display panel.

[0041] The provision of the compensation portion 113 allows some carriers to move from the first active portion 111 to the compensation portion 113, and then through the compensation portion 113 to the channel of the second active portion 112. In other words, the compensation portion 113 can divert some of the carriers that would otherwise have moved along the perpendicular edge between the side edge C1 and the connecting edge L1, thereby reducing the accumulation of carriers between the first active portion 111 and the second active portion 112.

[0042] Moreover, the movement of some carriers through the compensation portion 113 can also prevent these carriers from moving through the right-angled side between the side C1 and the connecting side L1. Instead, they move along the oblique side corresponding to the side C1 and the connecting side L1 through the compensation portion 113, thereby reducing the movement distance of some carriers. As a result, the accumulation of carriers between the first active portion 111 and the second active portion 112 can also be reduced.

[0043] Therefore, through the above-mentioned setting, the movement distance of the carriers from the first active portion 111 to the second active portion 112 can be reduced, and the carriers at the first active portion 111 and the second active portion 112 can be shunted through the compensation portion 113, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further reducing the driving transistor 10 from being forward biased, and further reducing the difficulty of lighting up the pixels electrically connected to the driving transistor 10, and reducing the pixel driving voltage, and further reducing the overall power consumption of the display panel.

[0044] In some embodiments, as shown in FIG. 1 , the driving transistor 10 further includes a light shielding layer 12 , a bottom gate 13 , and a top gate 14 .

[0045] Along the display panel substrate, toward the light-emitting side of the display panel, the light-shielding layer 12, bottom gate 13, active layer 11, and top gate 14 are arranged in this order. Specifically, the light-shielding layer 12 is located on the display panel substrate. The bottom gate 13 is located on the side of the light-shielding layer 12 facing away from the display panel substrate. The active layer 11 is located on the side of the bottom gate 13 facing away from the light-shielding layer 12. The top gate 14 is located on the side of the active layer 11 facing away from the bottom gate 13.

[0046] The light shielding layer 12 is used to shield the light from the external environment and the pixels toward the driving transistor 10 , thereby preventing the driving transistor 10 from shifting in characteristics due to light.

[0047] The bottom gate 13 and the top gate 14 are used to control the opening and closing of the channel within the active layer 11. Specifically, an electric field is applied to the active layer 11 through the bottom gate 13, the top gate 14, or both to control the movement of ions within the active layer 11, thereby forming a conductive channel. Simultaneously applying an electric field to the active layer 11 through both the bottom gate 13 and the top gate 14 allows for more precise control over the range and on / off state of the conductive channel within the active layer 11.

[0048] It should be noted that, although the bottom gate 13 and the top gate 14 are provided at the same time in this embodiment to control the generation of the conductive channel in the active layer 11, in fact, only one of the bottom gate 13 and the top gate 14 needs to be provided to control the switching state of the active layer 11. The bottom gate 13 and the top gate 14 are provided at the same time in order to better control the state of the conductive channel in the active layer 11.

[0049] In some embodiments, as shown in FIG. 2 and FIG. 3 , the active layer 11 further includes a first electrode 114 and a second electrode 115 .

[0050] The first electrode 114 and the second electrode 115 are located on both sides of the first active portion 111, and on the side of the first active portion 111 facing away from the second active portion 112. The first electrode 114 and the second electrode 115 are respectively connected to the first active portion 111. Specifically, the first electrode 114 can be connected to the first sub-active portion 1111, and the second electrode 115 can be connected to the second sub-active portion 1112, but the present invention is not limited thereto.

[0051] The first electrode 114 may be a source electrode, and the second electrode 115 may be a drain electrode, but the present invention is not limited thereto. Alternatively, the first electrode 114 may be a drain electrode, and the second electrode 115 may be a source electrode.

[0052] In some embodiments, as shown in Figures 2 and 3, the shape of the compensation portion 113 comprises a quasi-triangle. The quasi-triangle comprises a first-type side B1 and two second-type sides B2, wherein the length of the second-type sides B2 is shorter than that of the first-type sides B1. The compensation portion 113 is connected to the first active portion 111 and the second active portion 112 via the two second-type sides B2. A quasi-triangle is a shape formed by connecting two straight sides and a straight hypotenuse, or an arc-shaped hypotenuse. In other words, a quasi-triangle can be considered a triangle whose hypotenuse can be a straight line or an arc.

[0053] The provision of the compensation portion 113 allows some carriers to move from the first active portion 111 to the compensation portion 113, and then through the compensation portion 113 to the channel of the second active portion 112. In other words, the compensation portion 113 can divert some carriers that would otherwise need to move along the perpendicular edge between the side edge C1 and the connecting edge L1, thereby reducing the accumulation of carriers between the first active portion 111 and the second active portion 112.

[0054] Moreover, the movement of some carriers through the compensation portion 113 can also prevent these carriers from moving through the right-angled side between the side C1 and the connecting side L1. Instead, they move along the oblique side corresponding to the side C1 and the connecting side L1 through the compensation portion 113, thereby reducing the movement distance of some carriers. As a result, the accumulation of carriers between the first active portion 111 and the second active portion 112 can also be reduced.

[0055] Therefore, through the above-mentioned setting, the movement distance of the carriers from the first active portion 111 to the second active portion 112 can be reduced, and the carriers at the first active portion 111 and the second active portion 112 can be shunted through the compensation portion 113, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further reducing the driving transistor 10 from being forward biased, and further reducing the difficulty of lighting up the pixels electrically connected to the driving transistor 10, and reducing the pixel driving voltage, and further reducing the overall power consumption of the display panel.

[0056] At the same time, due to the effect of reducing the travel distance of some carriers, these carriers are prevented from traveling through the right-angled edge between the side C1 and the connecting edge L1. Instead, they travel through the compensation portion 113 along the hypotenuse corresponding to the side C1 and the connecting edge L1. Therefore, the flow of carriers primarily occurs through the hypotenuse corresponding to the side C1 and the connecting edge L1. By making the compensation portion 113 quasi-triangular, the flow channel for carriers is ensured while avoiding the presence of a portion of the compensation portion 113 through which fewer carriers flow. Thus, while ensuring the effect of reducing the travel distance of carriers from the first active portion 111 to the second active portion 112, the portion of the compensation portion 113 through which fewer carriers flow can be reduced. Consequently, while ensuring the effect of reducing the travel distance of carriers from the first active portion 111 to the second active portion 112, the utilization efficiency of the compensation portion 113 can be improved.

[0057] In some embodiments, the two second-type edges B2 include a second edge B21 connecting the compensation portion 113 to the first active portion 111, and a third edge B22 connecting the compensation portion 113 to the second active portion 112. The ratio of the third edge B22 to the second edge B21 is greater than or equal to 0.5.

[0058] When the ratio of the third side B22 to the second side B21 is less than 0.5, the contact area between the compensation portion 113 and the first active portion 111 is greater than the contact area between the compensation portion 113 and the second active portion 112. Therefore, carriers entering the compensation portion 113 through the boundary between the first active portion 111 and the compensation portion 113 will outnumber carriers entering the second active portion 112 through the compensation portion 113. In this case, considerable losses may also occur within the compensation portion 113 due to the different contact areas between the first active portion 111 and the second active portion 112.

[0059] Therefore, by making the ratio of the third side B22 to the second side B21 greater than or equal to 0.5, it can be effectively ensured that the compensation part 113 reduces the probability of the driving transistor 10 being forward biased.

[0060] Preferably, the ratio of the third side B22 to the second side B21 is greater than or equal to 1. That is, the length of the third side B22 is greater than or equal to the length of the second side B21. In this case, the contact area between the compensation portion 113 and the second active portion 112 is greater than or equal to the contact area between the compensation portion 113 and the first active portion 111. At this time, carriers moving from the first active portion 111 to the second active portion 112 via the compensation portion 113 can create a wider channel in the second active portion 112.

[0061] Therefore, when the ratio of the third side B22 to the second side B21 is greater than or equal to 1, it can be more effectively ensured that the compensation part 113 reduces the probability of the driving transistor 10 being forward biased.

[0062] In some embodiments, as shown in FIG2 , the length of the second side B21 is greater than or equal to 1.7 micrometers, and the length of the third side B22 is greater than or equal to 1.7 micrometers and less than or equal to 5.8 micrometers.

[0063] Taking a driving transistor 10 without the compensation portion 113 as an example, the on-state current in the characteristic saturation region is 1.93×10-6A, the channel threshold voltage is 1.87V, and the electron mobility is 1.44m 2 / (V·s). Its turn-on voltage is forward biased.

[0064] When the ratio of the third side B22 to the second side B21 is 1:

[0065] When the third side B22 and the second side B21 are equal to 1.75 microns, the on-state current of the characteristic saturation region of the driving transistor 10 is 1.89×10-6A, the channel threshold voltage is 1.9V, and the electron mobility is 1.44m 2 The negative bias of the turn-on voltage effectively improves the forward bias problem of the driving transistor 10 .

[0066] When the third side B22 and the second side B21 are equal to 2.75 microns, the on-state current of the characteristic saturation region of the driving transistor 10 is 2.7×10-6A, the channel threshold voltage is 1.67V, and the electron mobility is 1.97m 2 The negative bias of the turn-on voltage further improves the forward bias problem of the driving transistor 10 .

[0067] When the third side B22 and the second side B21 are equal to 4.75 microns, the on-state current of the characteristic saturation region of the driving transistor 10 is 4.49×10-6A, the channel threshold voltage is 1.35V, and the electron mobility is 3.04m 2 The negative bias of the turn-on voltage further improves the forward bias problem of the driving transistor 10 .

[0068] When the third side B22 and the second side B21 are equal to 5.75 microns, the on-state current of the characteristic saturation region of the driving transistor 10 is 5.29×10-6A, the channel threshold voltage is 1.28V, and the electron mobility is 3.48m 2 The negative bias of the turn-on voltage further improves the forward bias problem of the driving transistor 10 .

[0069] Therefore, by making the lengths of the second side B21 and the third side B22 satisfy the above numerical range, the forward bias problem of the driving transistor can be further improved.

[0070] In some embodiments, Figures 4 and 5 illustrate top views of two other types of active layers 11. As shown in Figures 2, 3, and 4, the shape of the first-type side B1 of the multiple compensation portions 113 includes at least one of a straight line, an inwardly concave arc, and an outwardly convex arc. For an embodiment in which the shape of the first-type side B1 of the multiple compensation portions 113 includes a straight line, refer to Figure 2; for an embodiment in which the shape of the first-type side B1 of the multiple compensation portions 113 includes an inwardly concave arc, refer to Figure 4; and for an embodiment in which the shape of the first-type side B1 of the multiple compensation portions 113 includes a convex arc, refer to Figure 5.

[0071] The provision of the compensation portion 113 allows some carriers to move from the first active portion 111 to the compensation portion 113, and then through the compensation portion 113 to the channel of the second active portion 112. In other words, the compensation portion 113 can divert some carriers that would otherwise need to move along the perpendicular edge between the side edge C1 and the connecting edge L1, thereby reducing the accumulation of carriers between the first active portion 111 and the second active portion 112.

[0072] Moreover, the movement of some carriers through the compensation portion 113 can also prevent these carriers from moving through the right-angled side between the side C1 and the connecting side L1. Instead, they move along the oblique side corresponding to the side C1 and the connecting side L1 through the compensation portion 113, thereby reducing the movement distance of some carriers. As a result, the accumulation of carriers between the first active portion 111 and the second active portion 112 can also be reduced.

[0073] Therefore, through the above-mentioned setting, the movement distance of the carriers from the first active portion 111 to the second active portion 112 can be reduced, and the carriers at the first active portion 111 and the second active portion 112 can be shunted through the compensation portion 113, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further reducing the driving transistor 10 from being forward biased, and further reducing the difficulty of lighting up the pixels electrically connected to the driving transistor 10, and reducing the pixel driving voltage, and further reducing the overall power consumption of the display panel.

[0074] At the same time, due to the effect of reducing the travel distance of some carriers, these carriers are prevented from traveling through the right-angled edge between the side C1 and the connecting edge L1. Instead, they travel through the compensation portion 113 along the hypotenuse corresponding to the side C1 and the connecting edge L1. Therefore, the flow of carriers primarily occurs through the hypotenuse corresponding to the side C1 and the connecting edge L1. By making the compensation portion 113 quasi-triangular, the flow channel for carriers is ensured while avoiding the presence of a portion of the compensation portion 113 through which fewer carriers flow. Thus, while ensuring the effect of reducing the travel distance of carriers from the first active portion 111 to the second active portion 112, the portion of the compensation portion 113 through which fewer carriers flow can be reduced. Consequently, while ensuring the effect of reducing the travel distance of carriers from the first active portion 111 to the second active portion 112, the utilization efficiency of the compensation portion 113 can be improved.

[0075] In some embodiments, FIG6 shows a top view of another driving transistor 10. As shown in FIG6, the compensation portion 113 also has a rectangular shape. The compensation portion 113 is connected to the first active portion 111 and the second active portion 112 through two adjacent sides of the rectangle.

[0076] The provision of the compensation portion 113 allows some carriers to move from the first active portion 111 to the compensation portion 113, and then through the compensation portion 113 to the channel of the second active portion 112. In other words, the compensation portion 113 can divert some carriers that would otherwise need to move along the perpendicular edge between the side edge C1 and the connecting edge L1, thereby reducing the accumulation of carriers between the first active portion 111 and the second active portion 112.

[0077] Moreover, the movement of some carriers through the compensation portion 113 can also prevent these carriers from moving through the right-angled side between the side C1 and the connecting side L1. Instead, they move along the oblique side corresponding to the side C1 and the connecting side L1 through the compensation portion 113, thereby reducing the movement distance of some carriers. As a result, the accumulation of carriers between the first active portion 111 and the second active portion 112 can also be reduced.

[0078] Therefore, through the above-mentioned setting, the movement distance of the carriers from the first active portion 111 to the second active portion 112 can be reduced, and the carriers at the first active portion 111 and the second active portion 112 can be shunted through the compensation portion 113, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further reducing the driving transistor 10 from being forward biased, and further reducing the difficulty of lighting up the pixels electrically connected to the driving transistor 10, and reducing the pixel driving voltage, and further reducing the overall power consumption of the display panel.

[0079] At the same time, since the compensation portion 113 can shunt some of the carriers at the interface between the first active portion 111 and the second active portion 112, making the compensation portion 113 rectangular can increase the size of the compensation portion 113 and increase the number of carriers that the compensation portion 113 can shunt. This ensures a flow channel for carriers while further reducing the accumulation of carriers at the interface between the first active portion 111 and the second active portion 112. This can further reduce the difficulty in lighting up pixels electrically connected to the drive transistor 10, reduce the pixel drive voltage, and further reduce the overall power consumption of the display panel.

[0080] In some embodiments, as shown in FIG6 , and with reference to FIG7 , which shows a partially enlarged view of the active layer 11 in FIG6 , the rectangle includes a first rectangular side J1 and a second rectangular side J2 adjacent to each other. The compensation portion 113 communicates with the first active portion 111 via the first rectangular side J1 and communicates with the second active portion 112 via the second rectangular side J2.

[0081] The first rectangular side J1 is the same length as the first sub-active portion 1111 or the second sub-active portion 1112, and the second rectangular side J2 is the same length as the distance from the side C1 of the first active portion 111 to the side C2 of the second active portion 112. FIG7 shows length L1 and length L2. The first rectangular side J1 is the same length as the first sub-active portion 1111 or the second sub-active portion 1112, that is, the first rectangular side J1 is the same length as length L1. The second rectangular side J2 is the same length as the distance from the side C1 of the first active portion 111 to the side C2 of the second active portion 112, that is, the second rectangular side J2 is the same length as length L2.

[0082] Taking a driving transistor 10 without the compensation portion 113 as an example, the on-state current in the characteristic saturation region is 1.93×10-6A, the channel threshold voltage is 1.87V, and the electron mobility is 1.44m 2 / (V·s). Its turn-on voltage is forward biased.

[0083] When the compensation portion 113 is provided as described above, the on-state current of the driving transistor 10 in the characteristic saturation region is 6.08×10-6A, the channel threshold voltage is 0.98V, and the electron mobility is 3.53m 2 The negative bias of the turn-on voltage can further improve the forward bias problem of the driving transistor 10 .

[0084] Therefore, through the above-mentioned setting, the movement distance of the carriers from the first active portion 111 to the second active portion 112 can be reduced, and the carriers at the first active portion 111 and the second active portion 112 can be shunted through the compensation portion 113, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further reducing the driving transistor 10 from being forward biased, and further reducing the difficulty of lighting up the pixels electrically connected to the driving transistor 10, and reducing the pixel driving voltage, and further reducing the overall power consumption of the display panel.

[0085] Furthermore, by providing a compensation portion 113 having a rectangular shape, with the first rectangular side J1 being the same length as the length L1 and the second rectangular side J2 being the same length as the length L2, the cross-sectional widths of the first active portion 111 and the second active portion 112 can be made equal, thereby further enhancing the shunting effect of the compensation portion 113 and the effect of reducing the carrier movement distance, thereby further making it less likely that the driving transistor 10 will be forward biased, further reducing the difficulty in lighting up pixels electrically connected to the driving transistor 10, reducing the pixel driving voltage, and further reducing the overall power consumption of the display panel.

[0086] In some embodiments, as shown in FIG7 , the length of the first rectangular side J1 is greater than or equal to 1.7 micrometers, and the length of the second rectangular side J2 is greater than or equal to 1.7 micrometers and less than or equal to 5.8 micrometers.

[0087] By ensuring that the first rectangular side J1 and the second rectangular side J2 of the compensation portion meet the above-mentioned numerical range, it can be ensured that the driving transistor 10 is not prone to forward bias, and the difficulty in lighting up the pixels electrically connected to the driving transistor 10 can be further reduced, the pixel driving voltage can be reduced, and the overall power consumption of the display panel can be further reduced.

[0088] In some embodiments, FIG8 shows a top view of another driving transistor 10, and FIG9 shows a partially enlarged view of the active layer 11 in FIG8 . As shown in FIG8 and FIG9 , the compensation portion 113 may also have a polygonal shape. The polygon includes a folded edge Z1 and two adjacent fixed edges Z2. The compensation portion 113 is connected to the first active portion 111 and the second active portion 112 via the two fixed edges Z2.

[0089] The provision of the compensation portion 113 allows some carriers to move from the first active portion 111 to the compensation portion 113, and then through the compensation portion 113 to the channel of the second active portion 112. In other words, the compensation portion 113 can divert some carriers that would otherwise need to move along the perpendicular edge between the side edge C1 and the connecting edge L1, thereby reducing the accumulation of carriers between the first active portion 111 and the second active portion 112.

[0090] Moreover, the movement of some carriers through the compensation portion 113 can also prevent these carriers from moving through the right-angled side between the side C1 and the connecting side L1. Instead, they move along the oblique side corresponding to the side C1 and the connecting side L1 through the compensation portion 113, thereby reducing the movement distance of some carriers. As a result, the accumulation of carriers between the first active portion 111 and the second active portion 112 can also be reduced.

[0091] Therefore, through the above-mentioned setting, the movement distance of the carriers from the first active portion 111 to the second active portion 112 can be reduced, and the carriers at the first active portion 111 and the second active portion 112 can be shunted through the compensation portion 113, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further reducing the driving transistor 10 from being forward biased, and further reducing the difficulty of lighting up the pixels electrically connected to the driving transistor 10, and reducing the pixel driving voltage, and further reducing the overall power consumption of the display panel.

[0092] The present application also provides a display device, comprising any of the above-mentioned display panels.

[0093] The above embodiments of the present application can complement each other if no conflict occurs.

[0094] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0095] The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0096] Those skilled in the art will readily appreciate other embodiments of the present application after consideration of the specification and practice. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present application are indicated by the following claims.

[0097] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A display panel, characterized in that: include: A plurality of pixel driving circuits; The plurality of pixel driving circuits are used to drive corresponding pixels to emit light; The pixel driving circuit includes a driving transistor, the driving transistor being used to control a pixel driving current supplied to the pixel; The driving transistor includes an active layer, the active layer includes a first active portion and a second active portion that are interconnected; the first active portion includes a first sub-active portion and a second sub-active portion; on a plane where the active layer is located, the first sub-active portion and the second sub-active portion are located on two opposite sides of the second active portion; and in a direction from the first sub-active portion to the second sub-active portion, a cross-sectional width of the first active portion is smaller than a cross-sectional width of the second active portion; The active layer further includes a plurality of compensation parts; the compensation parts are connected to the first active part and the second active part at the same time, and the compensation parts are located at an angle formed by at least part of the first active part and the second active part.

2. The display panel according to claim 1, characterized in that: The shape of the compensation part includes a quasi-triangle; the quasi-triangle includes a first-type side and two second-type sides, and the length of the second-type side is smaller than the first-type side; the compensation part is connected to the first active part and the second active part through the two second-type sides respectively.

3. The display panel according to claim 2, characterized in that: The two second-type edges include a second edge connecting the compensation portion with the first active portion, and a third edge connecting the compensation portion with the second active portion; a ratio of the third edge to the second edge is greater than or equal to 0.

5.

4. The display panel according to claim 3, characterized in that: The length of the second side is greater than or equal to 1.7 microns; the length of the third side is greater than or equal to 1.7 microns and less than or equal to 5.8 microns.

5. The display panel according to claim 2, characterized in that: The shapes of the first type of sides of the plurality of compensation portions include at least one of a straight line, an inwardly concave arc, and an outwardly convex arc.

6. The display panel according to claim 1, characterized in that: The shape of the compensation part also includes a rectangle; the compensation part is connected with the first active part and the second active part through two adjacent sides of the rectangle respectively.

7. The display panel according to claim 6, characterized in that: The rectangle includes a first rectangular side and a second rectangular side adjacent to each other; the compensation portion is connected to the first active portion through the first rectangular side, and is connected to the second active portion through the second rectangular side; The first rectangular side has the same length as the first sub-active portion or the second sub-active portion, and the second rectangular side has the same length as the length from the side of the first active portion to the side of the second active portion.

8. The display panel according to claim 6, characterized in that: The length of the first rectangular side is greater than or equal to 1.7 microns; the length of the second rectangular side is greater than or equal to 1.7 microns and less than or equal to 5.8 microns.

9. The display panel according to claim 1, characterized in that: The shape of the compensation part also includes a polygon; the polygon includes a broken line edge and two adjacent fixed edges, and the compensation part is connected to the first active part and the second active part through the two fixed edges respectively.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

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