Display panel and display device

Abstract

The utility model 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 the corresponding pixels to emit light. The pixel driving circuit includes a driving transistor for controlling a pixel driving current supplied to a pixel. The driving transistor comprises an active layer, and the active layer comprises a first active part and a second active part which are communicated with each other. The first active portion includes a first sub-active portion and a second sub-active portion. On the plane where the active layer is located, the first sub-active part and the second sub-active part are located on the two opposite sides of the second active part. And in the direction from the first sub-active part to the second sub-active part, the width of the cross section of the first active part is smaller than that of the cross section of the second active part. The active layer further includes a plurality of compensation portions. The compensation part is communicated with the first active part and the second active part at the same time, and the compensation part is located at an included angle formed by at least part of the first active part and the second active part.

Description

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] In the related technologies, with the continuous development of display technology, display panels are increasingly used in various production and life scenarios. Among them, organic self-luminous diode (OLED) display panels have been favored by quite a number of application scenarios due to their various excellent display characteristics. At present, when controlling the driving circuit of the OLED display panel, transistors using IGZO technology are often used to improve the display effect of the OLED display panel.

[0003] In a pixel driving circuit including transistors using IGZO technology, the driving transistor (DTFT) is a transistor that directly controls the driving current transmitted to the pixel, and its effect will greatly affect the display of the pixel. However, the driving transistor made of oxide material is prone to forward bias, making it difficult for the pixel to light up. Utility Model Content

[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 a pixel driving current supplied to the pixel;

[0006] 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;

[0007] 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.

[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 of edges 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 respectively.

[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 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.

[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 respectively through the two fixed edges.

[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 known 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 in 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] Figure 1 is a top view of a driving transistor according to an embodiment of the present application.

[0022] Figure 2 According to the embodiment of the present application Figure 1 A local enlarged view of the active layer in .

[0023] Figure 3 It is a top view of another active layer according to an embodiment of the present application.

[0024] Figure 4 It is a top view of another active layer according to an embodiment of the present application.

[0025] Figure 5 It is a top view of another active layer according to an embodiment of the present application.

[0026] Figure 6 is a top view of another driving transistor according to an embodiment of the present application.

[0027] Figure 7 According to the embodiment of the present application Figure 6 A local enlarged view of the active layer in .

[0028] Figure 8 is a top view of another driving transistor according to an embodiment of the present application.

[0029] Fig. 9 According to the embodiment of the present application Figure 8 A local enlarged view of the active layer in . DETAILED DESCRIPTION

[0030] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0031] The driving transistor currently used in the pixel driving circuit directly controls the pixel current supplied to the pixel to drive the pixel to emit light. Therefore, its performance is crucial to the effect of driving the pixel to emit light. However, the current driving transistor, especially the driving transistor whose material includes oxide material, includes a large number of free holes in its active layer. Due to the large number of free holes included in the active layer, the transistor has the characteristic of easily generating forward bias. When the transistor is forward biased, it will cause the pixel to be difficult 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 above-mentioned problem, an embodiment of the present application provides a display panel. The display panel includes: a plurality of pixel driving circuits.

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

[0034] The driving transistor 10 includes an active layer 11, Figure 2 It is shown that Figure 1 The structure of the active layer 11 can be referred to as Figure 2 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 where the active layer 11 is located, 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] And 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, Figure 2 As shown, 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 further includes a plurality of compensation portions 113. The compensation portion 113 is connected to both the first active portion 111 and the second active portion 112, and the compensation portion 113 is located at the angle formed by at least part of the first active portion 111 and the second active portion 112. The compensation portion 113 is located at the angle formed by at least part of the first active portion 111 and the second active portion 112, that is, the compensation portion 113 may be located at the angle formed by part of the first active portion 111 and the second active portion 112, or may be located at the angle formed by all of the first active portions 111 and the second active portion 112.

[0037] Specifically, Figure 2 and Figure 3 The top views of the two active layers 11 are shown respectively. Among them, the compensation part 113 is located at the angle formed by all the first active parts 111 and the second active parts 112. Figure 2 The compensation portion 113 is located at the angle formed by the first active portion 111 and the second active portion 112. Figure 3 The content shown.

[0038] It should be noted that Figure 3 What is shown is only a more possible embodiment in which the compensation portion 113 is located at the angle formed by a portion of the first active portion 111 and the second active portion 112. However, in other embodiments, it is not limited to this. The compensation portion 113 can also be located at the angle formed by a portion 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, at the place where the first active portion 111 and the second active portion 112 are connected, the side wall of the first active portion 111 will form an angle close to a right angle with the second active portion 112. Figure 2 The content shown, Figure 2The side C1 of the first sub-active part 1111 and the connecting side L1 of the second active part 112 on the side connected to the first sub-active part 1111 are shown. An angle approximately at 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 part 111 to the junction of the first active part 111 and the second active part 112, some of the carriers need to move along the approximately right angle side to enter the channel in the second active part 112 to move. This undoubtedly increases the moving distance of some carriers, and makes it impossible for the carriers to pass through the junction of the first active part 111 and the second active part 112 in time, resulting in accumulation, making the driving transistor 10 prone to forward bias, and further causing the pixel electrically connected to the driving transistor 10 to be difficult to light up, and the pixel driving voltage increases, and further causes the overall power consumption of the display panel to increase.

[0041] By providing the compensation portion 113, some carriers can move from the first active portion 111 to the compensation portion 113, and then move to the channel of the second active portion 112 through the compensation portion 113. In other words, the compensation portion 113 can shunt some of the carriers that originally need to move along the right-angled 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] Furthermore, the movement of some carriers through the compensation portion 113 can also prevent these carriers from moving through the right-angled edge between the side C1 and the connecting edge L1. Instead, they move along the oblique edge corresponding to the side C1 and the connecting edge 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 arrangement, 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 112, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further making it less likely that the driving transistor 10 will be forward biased, further reducing the difficulty in lighting up the pixels electrically connected to the driving transistor 10, reducing the pixel driving voltage, and further reducing the overall power consumption of the display panel.

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

[0045] Along the direction from the substrate of the display panel to the light-emitting side of the display panel, the light shielding layer 12, the bottom gate 13, the active layer 11 and the top gate 14 are arranged in sequence. That is, the light shielding layer 12 is located on the substrate of the display panel. The bottom gate 13 is located on the side of the light shielding layer 12 facing away from the substrate of the display panel, the active layer 11 is located on the side of the bottom gate 13 facing away from the light shielding layer 12, and 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 emitted from the external environment and the pixels toward the driving transistor 10 , thereby preventing the driving transistor 10 from shifting its 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 in the active layer 11. That is, an electric field is applied to the active layer 11 through the bottom gate 13, or the top gate 14, or through both the bottom gate 13 and the top gate 14 to control the movement of ions in the active layer 11 to form a conductive channel. By applying an electric field to the active layer 11 through both the bottom gate 13 and the top gate 14, the range and switching state of the conductive channel in the active layer 11 can be more finely controlled.

[0048] It should be noted that, although the bottom gate 13 and the top gate 14 are simultaneously provided in the present 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, and 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, Figure 2 and Figure 3 As shown, 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 may be connected to the first sub-active portion 1111, and the second electrode 115 may 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 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, Figure 2 and Figure 3As shown, the shape of the compensation part 113 includes a quasi-triangle. The quasi-triangle includes a first-type side B1 and two second-type sides B2, and the length of the second-type side B2 is less than the first-type side B1. The compensation part 113 is connected to the first active part 111 and the second active part 112 through the two second-type sides B2. Among them, the quasi-triangle refers to a shape formed by two straight sides and a straight hypotenuse, or an arc hypotenuse connected to each other, that is, the quasi-triangle can be regarded as a triangle whose hypotenuse can be a straight line or an arc.

[0053] By providing the compensation portion 113, some carriers can move from the first active portion 111 to the compensation portion 113, and then move to the channel of the second active portion 112 through the compensation portion 113. That is, some carriers that originally need to move along the right angle between the side edge C1 and the connecting edge L1 can be shunted through the compensation portion 113, thereby reducing the accumulation of carriers between the first active portion 111 and the second active portion 112.

[0054] Furthermore, the movement of some carriers through the compensation portion 113 can also prevent these carriers from moving through the right-angled edge between the side C1 and the connecting edge L1. Instead, they move along the oblique edge corresponding to the side C1 and the connecting edge 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 arrangement, 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 112, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further making it less likely that the driving transistor 10 will be forward biased, further reducing the difficulty in lighting up the pixels electrically connected to the driving transistor 10, 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 moving distance of some carriers, these carriers are prevented from moving through the right-angled side of the side C1 and the connecting side L1, but move along the hypotenuse corresponding to the side C1 and the connecting side L1 through the compensation part 113. Therefore, the flow of carriers mainly passes through the hypotenuse corresponding to the side C1 and the connecting side L1. By making the compensation part 113 quasi-triangular, it is possible to ensure the flow channel of carriers while avoiding the presence of a portion of the compensation part 113 through which fewer carriers flow, thereby ensuring the effect of reducing the moving distance of carriers from the first active part 111 to the second active part 112, and reducing the portion of the compensation part 113 through which fewer carriers flow, and further, while ensuring the effect of reducing the moving distance of carriers from the first active part 111 to the second active part 112, the utilization efficiency of the compensation part 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, since 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, the carriers entering the compensation portion 113 through the boundary between the first active portion 111 and the compensation portion 113 will be greater than the carriers entering the second active portion 112 through the compensation portion 113. At this time, the compensation portion 113 may also generate considerable losses due to the different contact areas between the compensation portion 113 and 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. At this time, the contact area between the compensation portion 113 and the second active portion 112 will be greater than or equal to the contact area between the compensation portion 113 and the first active portion 111. At this time, the carriers moving from the first active portion 111 to the second active portion 112 via the compensation portion 113 will be able to open 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, reference Figure 2 As shown, 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 part 113 as an example, the on-state current in the characteristic saturation region is 1.93×10 -6 A, the channel opening voltage is 1.87V, and the electron mobility is 1.44m 2 / (V·s). Its turn-on voltage is positively 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 micrometers, the on-state current of the characteristic saturation region of the driving transistor 10 is 1.89×10 -6 A, the channel opening 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 micrometers, the on-state current of the characteristic saturation region of the driving transistor 10 is 2.7×10 -6 A, the channel opening voltage is 1.67V, and the electron mobility is 1.97m 2 The turn-on voltage is negatively biased, which 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 micrometers, the on-state current of the characteristic saturation region of the driving transistor 10 is 4.49×10 -6 A, the channel opening voltage is 1.35V, and the electron mobility is 3.04m 2 The turn-on voltage is negatively biased, which 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 micrometers, the on-state current of the characteristic saturation region of the driving transistor 10 is 5.29×10 -6 A, the channel opening voltage is 1.28V, and the electron mobility is 3.48m 2 The turn-on voltage is negatively biased, which 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, Figure 4 and Figure 5 1 and 2 show top views of two other active layers 11. Figure 2 , Figure 3 and Figure 4 As shown, the shape of the first type side B1 of the plurality of compensation portions 113 includes at least one of a straight line, an inward concave arc, and an outward convex arc. The embodiment in which the shape of the first type side B1 of the plurality of compensation portions 113 includes a straight line can refer to Figure 2 The embodiment in which the shape of the first type side B1 of the plurality of compensation portions 113 includes an inwardly concave arc can refer to Figure 4 The shape of the first type side B1 of the plurality of compensation portions 113 includes an embodiment of a convex arc line, which can be referred to Figure 5 The content shown.

[0071] By providing the compensation portion 113, some carriers can move from the first active portion 111 to the compensation portion 113, and then move to the channel of the second active portion 112 through the compensation portion 113. That is, some carriers that originally need to move along the right angle between the side edge C1 and the connecting edge L1 can be shunted through the compensation portion 113, thereby reducing the accumulation of carriers between the first active portion 111 and the second active portion 112.

[0072] Furthermore, the movement of some carriers through the compensation portion 113 can also prevent these carriers from moving through the right-angled edge between the side C1 and the connecting edge L1. Instead, they move along the oblique edge corresponding to the side C1 and the connecting edge 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 arrangement, 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 112, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further making it less likely that the driving transistor 10 will be forward biased, further reducing the difficulty in lighting up the pixels electrically connected to the driving transistor 10, 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 moving distance of some carriers, these carriers are prevented from moving through the right-angled side of the side C1 and the connecting side L1, but move along the hypotenuse corresponding to the side C1 and the connecting side L1 through the compensation part 113. Therefore, the flow of carriers mainly passes through the hypotenuse corresponding to the side C1 and the connecting side L1. By making the compensation part 113 quasi-triangular, it is possible to ensure the flow channel of carriers while avoiding the presence of a portion of the compensation part 113 through which fewer carriers flow, thereby ensuring the effect of reducing the moving distance of carriers from the first active part 111 to the second active part 112, and reducing the portion of the compensation part 113 through which fewer carriers flow, and further, while ensuring the effect of reducing the moving distance of carriers from the first active part 111 to the second active part 112, the utilization efficiency of the compensation part 113 can be improved.

[0075] In some embodiments, Figure 6 FIG. 1 shows a top view of another driving transistor 10. Figure 6 As shown, the shape of the compensation portion 113 also includes a rectangle. 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] By providing the compensation portion 113, some carriers can move from the first active portion 111 to the compensation portion 113, and then move to the channel of the second active portion 112 through the compensation portion 113. That is, some carriers that originally need to move along the right angle between the side edge C1 and the connecting edge L1 can be shunted through the compensation portion 113, thereby reducing the accumulation of carriers between the first active portion 111 and the second active portion 112.

[0077] Furthermore, the movement of some carriers through the compensation portion 113 can also prevent these carriers from moving through the right-angled edge between the side C1 and the connecting edge L1. Instead, they move along the oblique edge corresponding to the side C1 and the connecting edge 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 arrangement, 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 112, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further making it less likely that the driving transistor 10 will be forward biased, further reducing the difficulty in lighting up the pixels electrically connected to the driving transistor 10, 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 part of the carriers at the interface between the first active portion 111 and the second active portion 112, by making the compensation portion 113 rectangular, the size of the compensation portion 113 can be enlarged, and the number of carriers that can be shunted by the compensation portion 113 can be increased, so as to ensure the flow channel of the carriers while further reducing the accumulation of carriers at the interface between the first active portion 111 and the second active portion 112, thereby further reducing the difficulty of lighting up the pixels electrically connected to the driving transistor 10, reducing the pixel driving voltage, and further reducing the overall power consumption of the display panel.

[0080] In some embodiments, Figure 6 As shown, and refer to Figure 7 Shown Figure 6 The rectangle includes a first rectangular side J1 and a second rectangular side J2 adjacent to each other. The compensation portion 113 is connected to the first active portion 111 through the first rectangular side J1, and is connected to the second active portion 112 through the second rectangular side J2.

[0081] The first rectangular side J1 has the same length as the first sub-active portion 1111 or the second sub-active portion 1112, and the second rectangular side J2 has the same length as the side C1 of the first active portion 111 to the side C2 of the second active portion 112. Figure 7 The length L1 and the length L2 are shown. 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 the length L1. The second rectangular side J2 is the same length as 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 the length L2.

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

[0083] When the compensation unit 113 is set as described above, the on-state current of the characteristic saturation region of the driving transistor 10 is 6.08×10 -6 A, the channel opening 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 arrangement, 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 112, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further making it less likely that the driving transistor 10 will be forward biased, further reducing the difficulty in lighting up the pixels electrically connected to the driving transistor 10, reducing the pixel driving voltage, and further reducing the overall power consumption of the display panel.

[0085] Furthermore, by setting a compensation portion 113 having a rectangular shape in which the first rectangular side J1 is the same length as the length L1 and the second rectangular side J2 is 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, reference Figure 7 As shown, 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 making the first rectangular side J1 and the second rectangular side J2 of the compensation part satisfy the above 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, Figure 8 FIG. 1 shows a top view of another driving transistor 10. Fig. 9 It is shown that Figure 8 A partial enlarged view of the active layer 11 in FIG. Figure 8 and Fig. 9 As shown, the shape of the compensation portion 113 also includes a polygon. The polygon includes a fold line 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 through the two fixed edges Z2.

[0089] By providing the compensation portion 113, some carriers can move from the first active portion 111 to the compensation portion 113, and then move to the channel of the second active portion 112 through the compensation portion 113. That is, some carriers that originally need to move along the right angle between the side edge C1 and the connecting edge L1 can be shunted through the compensation portion 113, thereby reducing the accumulation of carriers between the first active portion 111 and the second active portion 112.

[0090] Furthermore, the movement of some carriers through the compensation portion 113 can also prevent these carriers from moving through the right-angled edge between the side C1 and the connecting edge L1. Instead, they move along the oblique edge corresponding to the side C1 and the connecting edge 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 arrangement, 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 112, thereby effectively reducing the accumulation of carriers at the junction of the first active portion 111 and the second active portion 112, and further making it less likely that the driving transistor 10 will be forward biased, further reducing the difficulty in lighting up the pixels electrically connected to the driving transistor 10, 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 one of the above-mentioned display panels.

[0093] The above embodiments of the present application may 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 is also 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 is 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 is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two 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" means 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 considering the specification and practice. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, 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 precise structures that have been 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 7, 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.

Images