Display panel and display device

Abstract

A display panel and a display device provided by the present application include: a secondary display area and a transition display area; a plurality of light-emitting units; a plurality of pixel driving circuits; and a plurality of connecting traces. Among them, the plurality of light-emitting units are distributed in multiple columns; the plurality of pixel driving circuits are distributed in multiple columns; the first unit column group is connected to the first circuit column group through the first connecting trace, the second unit column group is connected to the third circuit column group through the second connecting trace, and the third unit column group is connected to the second circuit column group through the third connecting trace; the third connecting trace and the first connecting trace extend between the two display areas together. In this way, by adjusting the positions of the driving circuits of different light-emitting units, the pixel driving circuit located in the middle of the secondary display area is arranged in the second circuit column group, and the third connecting trace for connection is routed by walking together with the first connecting traces of other rows, thereby reducing the length of the third connecting trace, reducing the probability of capacitance mutation, and improving the product yield.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) display devices have the characteristics of wide viewing angle, high contrast ratio, fast response speed, wide color gamut, high screen-to-body ratio, self-luminescence, lightness and thinness. Due to the above characteristics, OLED display devices have gradually attracted wide attention and can be applied to devices with display functions such as mobile phones, monitors, laptop computers, smart watches, digital cameras, instruments, and flexible wearable devices. With the increasing diverse usage requirements of users for display devices and the emergence of the design requirement of high screen-to-body ratio for display devices, a solution of an under-screen camera has emerged currently, that is, imaging modules such as cameras are embedded in a secondary display area to reduce the size of the border area of the display device, thereby increasing the screen-to-body ratio.

[0003] However, in the existing under-screen camera solutions, the display screen at the position of the under-screen camera is prone to capacitance mutation, resulting in product defects. Summary of the Invention

[0004] In view of this, the present application provides a display panel and a display device to reduce the connection trace distance between the light-emitting elements and the pixel circuits, thereby reducing the probability of capacitance mutation and improving the product yield.

[0005] Based on the above purpose, the present application provides a display panel, including: a secondary display area and a transition display area, at least a part of the transition display area is disposed around the secondary display area;

[0006] A plurality of light-emitting units are arranged in an array along a first direction and a second direction in the secondary display area;

[0007] A plurality of pixel driving circuits are arranged in an array along the first direction and the second direction in the transition display area, and at least a part of the pixel driving circuits drive the plurality of light-emitting units to emit light through a plurality of connection traces respectively;

[0008] Among them, the multiple light-emitting units are distributed in multiple columns along a first direction to form multiple unit column groups. The multiple unit column groups include a first unit column group, a second unit column group, and a third unit column group arranged from the edge to the center of the sub-display area. The multiple pixel driving circuits are distributed in multiple columns along the first direction to form multiple circuit column groups. The multiple circuit column groups include a first circuit column group, a second circuit column group, and a third circuit column group arranged from near to far from the sub-display area. The light-emitting units of the first unit column group are connected to the pixel driving circuits of the first circuit column group through first connection traces. The light-emitting units of the second unit column group are connected to the pixel driving circuits of the third circuit column group through second connection traces. The light-emitting units of the third unit column group are connected to the pixel driving circuits of the second circuit column group through third connection traces. The multiple pixel driving circuits are distributed in multiple rows along a second direction. At least one row of the third connection traces extends along the second direction to the y-th row and is parallel to the first connection traces of the y-th row, and extends along the first direction to the sub-display area, where y≥2, and the first direction intersects the second direction.

[0009] In some embodiments,

[0010] The multiple light-emitting units are arranged in n columns along the first direction, where n is a positive integer, and the light-emitting units in the first column are located on one edge of the sub-display area close to the transition display area;

[0011] The first unit column group includes the light-emitting units located in the 1st to n1-th columns, the second unit column group includes the light-emitting units located in the (n1 + 1)-th to n2-th columns, and the third unit column group includes the light-emitting units located in the (n2 + 1)-th to n-th columns; where 1 < n1 < n2 < n, and both n1 and n2 are positive integers;

[0012] The multiple pixel driving circuits are arranged in m columns along the first direction, where m is a positive integer, and the pixel driving circuits in the first column are located on one edge of the transition display area close to the sub-display area;

[0013] The first circuit column group includes the pixel driving circuits located in the 1st to m1-th columns, the second circuit column group includes the pixel driving circuits located in the (m1 + 1)-th to m2-th columns, and the third circuit column group includes the pixel driving circuits located in the (m2 + 1)-th to m-th columns; where 1 < m1 < m2 < m, and both m1 and m2 are positive integers.

[0014] In some embodiments, the first connection traces and the third connection traces are located in a first transparent conductive layer, and the second connection traces are located in a second transparent conductive layer.

[0015] In some embodiments, the first transparent conductive layer and the second transparent conductive layer respectively include transparent conductive materials.

[0016] In some embodiments, both the first connection trace and the second connection trace extend in a first direction through the secondary display area and the transition display area.

[0017] In some embodiments, the plurality of light-emitting units are arranged in p rows along the second direction from the edge to the center of the secondary display area, where p is a positive integer, and the light-emitting units in the p-th row are located at one edge of the secondary display area extending along the second direction; the plurality of pixel driving circuits are correspondingly arranged in p rows with the plurality of light-emitting units;

[0018] At least one connection trace among the plurality of connection traces is used to connect the light-emitting units and the corresponding pixel driving circuits in the same row.

[0019] In some embodiments, the third connection trace includes: a first portion, a second portion, a third portion, a fourth portion, and a fifth portion; the first portion extends in the first direction in the transition display area, the second portion extends in the second direction in the transition display area, the third portion extends from the transition display area to the secondary display area along the first direction, the fourth portion extends in the second direction in the secondary display area, and the fifth portion extends in the first direction in the secondary display area.

[0020] In some embodiments, the secondary display area gradually increases in area range from the edge to the center along the first direction; the secondary display area gradually increases in area range from the edge to the center along the second direction.

[0021] In some embodiments, the third connection traces of each row in the third unit column group, together with the first connection traces of the current row number plus q rows, extend from the transition display area to the secondary display area; where q is a natural number, and q is determined according to the row number of the third connection trace.

[0022] In some embodiments, the secondary display area is a circular secondary display area.

[0023] In some embodiments, the secondary display area and the transition display area are disposed on a substrate; at least a portion of the orthographic projections of the first connection trace, the second connection trace, and the third connection trace on the substrate overlap.

[0024] In some embodiments, the plurality of light-emitting units are a plurality of red sub-pixel light-emitting units, a plurality of green sub-pixel light-emitting units, and a plurality of blue sub-pixel light-emitting units that are spaced apart.

[0025] In some embodiments, the plurality of light-emitting units are distributed in multiple rows along the second direction, and the plurality of red sub-pixel light-emitting units, the plurality of green sub-pixel light-emitting units, and the plurality of blue sub-pixel light-emitting units are arranged at intervals in each row.

[0026] Based on the same concept, the present application further provides a display device, including the display panel as described above; and a sensor disposed on the backlight side of the display panel, where the sensor at least partially overlaps with the secondary display area of the display panel in the orthographic projection on the substrate of the display panel.

[0027] As can be seen from the above, a display panel and a display device provided by the present application include: a secondary display area and a transition display area; a plurality of light-emitting units; a plurality of pixel driving circuits; a plurality of connection traces; wherein, the plurality of light-emitting units are distributed in multiple columns; the plurality of pixel driving circuits are distributed in multiple columns; the first unit column group is connected to the first circuit column group through the first connection trace, the second unit column group is connected to the third circuit column group through the second connection trace, and the third unit column group is connected to the second circuit column group through the third connection trace; the third connection trace and the first connection trace extend between the two display areas together. In this way, by adjusting the positions of the driving circuits of different light-emitting units, the pixel driving circuit located in the middle of the secondary display area is disposed in the second circuit column group, and the third connection trace for connection is routed by running together with the first connection traces of other rows, thereby reducing the length of the third connection trace, reducing the probability of capacitance mutation, and improving the product yield. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic plan view of a display device provided by an embodiment of the present application;

[0030] Figure 2 It is a schematic cross-sectional view of a display device provided by an embodiment of the present application taken along the line AA' in Figure 1 ;

[0031] Figure 3 It is a schematic partial view of an existing display panel provided by an embodiment of the present application;

[0032] Figure 4 It is a schematic partial view of a display panel provided by an embodiment of the present application;

[0033] Figure 5 It is a partial structural schematic diagram of the array arrangement of the light-emitting units in the sub-display area provided by the embodiments of the present application;

[0034] Figure 6(1) is a wiring schematic diagram of the first connection trace, the second connection trace, and the third connection trace when the first transparent conductive layer and the second transparent conductive layer of a display panel provided by the embodiments of the present application are stacked;

[0035] Figure 6(2) is a wiring schematic diagram of the second connection trace in the second transparent conductive layer of a display panel provided by the embodiments of the present application;

[0036] Figure 6(3) is a wiring schematic diagram of the first connection trace and the third connection trace in the first transparent conductive layer of a display panel provided by the embodiments of the present application;

[0037] Figure 7 It is a comparison chart of the length of each column connection trace and the capacitance of the corresponding light-emitting unit between the existing solution and the solution of this embodiment provided by the embodiments of the present application. Detailed implementation manners

[0038] To make the purpose, technical solutions and advantages of this specification clearer, the following further details this specification in conjunction with specific embodiments and with reference to the accompanying drawings.

[0039] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the ordinary meanings understood by those of ordinary skill in the art to which the present application belongs. The "first", "second" and similar terms used in the embodiments of the present application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "include" or "comprise" mean that the elements, objects or method steps appearing before this word cover the elements, objects or method steps listed after this word and their equivalents, without excluding other elements, objects or method steps. The terms such as "connect" or "be connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0040] As described in the background art section, as Figure 1 shown, it is a planar structural schematic diagram of a display device according to some exemplary embodiments of the present application, in which the planar structure of a display panel 10 included in the display device is schematically shown. Figure 2 is a cross-sectional structural schematic diagram of the display device according to some exemplary embodiments of the present application taken along Figure 1 the line AA' in.

[0041] As Figure 1 shown, the display device according to an embodiment of the present disclosure includes a display panel 10. The display panel 10 includes a screen display area, and the screen display area may include a secondary display area 11, a transition display area 12, and other display areas. Among them, the secondary display area 11, the transition display area 12, and the other display areas may not overlap with each other. Among them, the transition display area 12 is at least distributed on both sides of the secondary display area 11.

[0042] For a display panel having an under-screen sensor (for example, an image sensor), in order to improve the light transmittance of the secondary display area corresponding to the under-screen sensor of the display panel, the unit area distribution density (PPI) of the light-emitting devices in the secondary display area corresponding to the under-screen sensor may be less than the unit area distribution density of the light-emitting devices in other display areas of the display panel.

[0043] As Figure 2 shown, the display panel 10 may include a substrate 1. The sensor 2001 may be disposed on the back surface of the substrate 1 located in the secondary display area 11 (shown as the lower side in Figure 2 , such as the side opposite to the light-emitting direction when displaying), and the secondary display area 11 may meet the imaging requirements of the sensor 2001 for light transmittance.

[0044] Among them, the light transmittance of the secondary display area 11 is greater than the light transmittance of other display areas. The sensor 2001 is, for example, an image sensor or an infrared sensor, etc. The sensor 2001 is configured to receive light from the display side of the display panel 10 ( Figure 2 the upper side in, for example, the light-emitting direction of the display or the direction where the human eye is located when displaying), so that operations such as image shooting, distance sensing, and light intensity sensing can be performed. These lights can pass through the secondary display area 11 and then irradiate onto the sensor 2001, and thus be sensed by the sensor 2001.

[0045] It should be noted that in the illustrated exemplary embodiment, the transition display area 12 is disposed on both sides of the secondary display area 11. However, the embodiments of the present application are not limited thereto. For example, in other embodiments, the transition display area 12 may be located at the upper edge position of the display panel 10; or the transition display area 12 may be located at the upper edge position of the display panel 10 and arranged along the entire width of the display panel.

[0046] As Figure 1 , Figure 2In the shown display panel, OLED display technology can be adopted. Since OLED display panels have advantages such as wide viewing angles, high contrast ratios, fast response times, low power consumption, foldability, flexibility, etc., they are thus increasingly widely used in display products. With the development and in-depth application of OLED display technology, the demand for high screen-to-body ratio display screens is becoming increasingly strong. In Figure 1 , Figure 2 In the shown display panel, an under-screen camera solution is adopted. In this way, the notch area can be eliminated, the need to punch holes in the display screen can be avoided, and the screen-to-body ratio can be increased, providing a better visual experience.

[0047] In addition, as Figure 2 shown, the display panel 10 may further include a driving circuit layer 2002, a light-emitting device layer 2003, and a packaging layer 2004 disposed on the substrate 1. The driving circuit layer 2002 includes a driving circuit structure, and the light-emitting device layer 2003 includes light-emitting devices such as OLEDs. The driving circuit structure controls the light-emitting devices of each sub-pixel to emit light to achieve the display function. The driving circuit structure includes thin-film transistors, storage capacitors, and various signal lines. The various signal lines include gate lines, data lines, ELVDD power supply lines, ELVSS power supply lines, etc., so as to provide various signals such as control signals, data signals, and power supply voltages for the pixel driving circuits in each sub-pixel.

[0048] As Figure 3 shown, in the current technology, due to the relevant requirements for the light transmittance and the like of the secondary display area 11 in the under-screen camera solution, the light-emitting units 13 in the secondary display area 11 need to be separated from their corresponding pixel driving circuits 14, and the pixel driving circuits 14 are disposed in the transition display area 12. At the same time, the pixel driving circuits 14 can not only control the light emission of the light-emitting units 13, but also control the corresponding sensors to work. Then, due to the requirements for key attributes such as the light transmittance and display effect of the secondary display area 11, it is best for each light-emitting unit 13 to be "one-to-one" connected to the corresponding pixel driving circuit 14. At the same time, since the connection traces 15 for connection may be etched using transparent metal oxides such as indium tin oxide (ITO) and indium zinc oxide (IZO) as conductive materials, it is also best for the connection traces 15 not to cross each other to prevent problems such as signal short circuits. Thus, in the current technology, the routing manner of the connection traces 15 is as Figure 3As shown, however, it can be seen that the connection traces 15 corresponding to the light-emitting units 13 in the central region near the secondary display area 11 need to detour a very long distance to be connected to their corresponding pixel driving circuits 14. As a result, the distance and position of the connection traces 15 between the light-emitting units 13 at the center position of the secondary display area 11 (i.e., the camera hole) and the pixel driving circuits 14 increase. An overly long distance is likely to cause a capacitance mutation, and at the same time, this mutation cannot be compensated for. Eventually, fine vertical stripes will appear in the secondary display area 11, resulting in a defective product.

[0049] Combining the above actual situation, the embodiments of the present application propose a display panel and a display device. By adjusting the positions of the driving circuits of different light-emitting units, the pixel driving circuits located in the middle of the secondary display area are arranged in the second circuit column group, and the third connection traces for connection are routed by running together with the first connection traces of other rows, thereby reducing the length of the third connection traces, reducing the probability of capacitance mutation, and improving the product yield.

[0050] As Figure 4 shown, a structural schematic diagram of a display panel includes: a secondary display area 11 and a transition display area 12, at least part of the transition display area 12 is arranged around the secondary display area 11;

[0051] A plurality of light-emitting units 13 are arranged in an array in the secondary display area 11 along the first direction X (horizontal direction) and the second direction Y (vertical direction);

[0052] A plurality of pixel driving circuits 14 are arranged in an array in the transition display area 12 along the first direction X and the second direction Y, and at least part of the pixel driving circuits 14 drive the plurality of light-emitting units 13 to emit light through a plurality of connection traces 15 respectively;

[0053] Among them, the multiple light-emitting units 13 are distributed in multiple columns along the first direction X to form multiple unit column groups. The multiple unit column groups include a first unit column group 131, a second unit column group 132, and a third unit column group 133 arranged from the edge to the center of the secondary display area 11; the multiple pixel driving circuits 14 are distributed in multiple columns along the first direction X to form multiple circuit column groups. The multiple circuit column groups include a first circuit column group 141, a second circuit column group 142, and a third circuit column group 143 arranged from near to far from the secondary display area 11; the light-emitting units 13 of the first unit column group 131 are connected to the pixel driving circuits 14 of the first circuit column group 141 through first connection traces 151, the light-emitting units 13 of the second unit column group 132 are connected to the pixel driving circuits 14 of the third circuit column group 143 through second connection traces 152, and the light-emitting units 13 of the third unit column group 133 are connected to the pixel driving circuits 14 of the second circuit column group 142 through third connection traces 153; the multiple pixel driving circuits 14 are distributed in multiple rows along the second direction Y. At least one row of the third connection traces 153 extends along the second direction Y to the y-th row and is parallel to the first connection traces 151 of the y-th row and extends along the first direction X to the secondary display area 11, where y≥2, and the first direction X intersects the second direction Y.

[0054] In this embodiment, as Figure 5 shown, the multiple light-emitting units 13 are respectively arranged in an array in the secondary display area 11. Specifically, the light-emitting units 13 can be arranged in an array in the secondary display area 11 along the first direction (the X direction shown in the figure) and the second direction (the Y direction shown in the figure). In some embodiments, each light-emitting unit 13 may include multiple sub-pixels. In some embodiments, the light-emitting unit 13 may further include multiple sub-pixels, such as red sub-pixels, green sub-pixels, and blue sub-pixels. The multiple pixel driving circuits 14 are located in the transition display area 12. Among them, at least a part of the multiple pixel driving circuits 14 are configured to drive the multiple light-emitting units 13 in a one-to-one correspondence. As Figure 4As shown, the rectangular boxes therein represent a pixel driving circuit unit, and each pixel driving circuit unit may include a first number of pixel driving circuits 14. For example, the ratio of the number of pixel driving circuit units in the transition display area 12 to the number of pixel driving circuits 14 is 2:1. It should be noted that the embodiments of the present application are not limited thereto, and this ratio can be set to other values, such as 1:1, 3:1, 4:1, etc. Further, among every several first pixel driving units, only the pixel driving circuit of one pixel driving circuit unit is used to drive the light-emitting unit 13. Therefore, the pixel driving circuit included in the first pixel driving unit used to drive the light-emitting unit 13 is referred to as the pixel driving circuit 14, and the pixel driving circuit included in the first pixel driving unit that is not used to drive the light-emitting unit 13 is referred to as a dummy circuit ( Figure 4 The empty rectangle between adjacent pixel driving circuits 14 in is one or several dummy circuits). Among them, the pixel driving circuit 141 and the dummy circuit may have basically the same circuit structure. After that, corresponding to the light-emitting unit 13, as Figure 4 shown, a plurality of pixel driving circuits 14 are respectively arranged in an array in the transition display area 12. Specifically, the pixel driving circuits 14 may be arranged in an array in the transition display area 12 along a first direction (the X direction shown in the figure) and a second direction (the Y direction shown in the figure).

[0055] After that, as Figure 4 shown, each light-emitting unit 13 is electrically connected to the corresponding pixel driving circuit 14 through a connection trace 15. In this embodiment, at least one end of at least one connection trace 15 among the plurality of connection traces 15 is electrically connected to at least one light-emitting unit 13, and the other end is electrically connected to at least one pixel driving circuit 14. That is to say, at least one end of at least one connection trace 15 among the plurality of connection traces 15 is located in the secondary display area 11, and the other end is located in the transition display area 12. That is, at least one connection trace 15 among the plurality of connection traces 15 extends from the secondary display area 11 to the transition display area 12. In this way, the light-emitting unit 13 located in the secondary display area 11 can be electrically connected to the pixel driving circuit 14 located in the transition display area 12. The plurality of connection traces 15 are used to provide driving signals to the plurality of light-emitting units 13 respectively.

[0056] In this embodiment, the light-emitting units 13 arranged in an array can be grouped along the first direction X. For example, as Figure 5As shown, the edge of the secondary display area 11 is the first column, and the center position of the secondary display area 11 is the 40th column. According to the divided columns, the light-emitting units 13 can be divided into different unit column groups. For example, the first to the 18th columns are the first unit column group 131, the 19th to the 36th columns are the second unit column group 132, and the 37th to the 40th columns are the third unit column group 133. Correspondingly, the pixel driving circuits 14 arranged in an array along the first direction X can also be grouped. For example, as Figure 4 shown, the edge of the transition display area 12 close to the secondary display area 11 is arranged in sequence after the first column, Figure 4 in which the 50th column is the last pixel driving circuit 14. According to the divided columns, the pixel driving circuits 14 can be divided into different circuit column groups. For example, the first to the 18th columns are the first circuit column group 141, the 19th to the 31st columns are the second circuit column group 142, and the 32nd to the 50th columns are the third circuit column group 143. The above grouping method can be adjusted accordingly according to the specific application scenario. After that, in order to reduce the length of the connection traces 15, especially the length of the connection traces 15 of the light-emitting units 13 with a larger number of columns in the middle of the secondary display area 11, when configuring the pixel driving circuits 14, after configuring the pixel driving circuits 14 of the first 18 columns of the light-emitting units 13, the pixel driving circuits 14 of the light-emitting units 13 in the 37th to 40th columns can be directly configured. That is, in the embodiment as Figure 4 shown, the corresponding number of pixel driving circuits 14 in the 19th to 31st columns of the pixel driving circuits 14 are configured as the light-emitting units 13 in the 37th to 40th columns. After that, the pixel driving circuits 14 corresponding to the light-emitting units 13 in the 19th to 36th columns that are relatively close are arranged at the end of the transition display area 12, that is, the 32nd to 50th columns of the pixel driving circuits 14. In this embodiment, the pixel driving circuits 14 in the 27th to 31st columns can be configured as the light-emitting units 13 in the 37th to 40th columns, and the 19th to 26th columns are dummy circuits for connecting the traces 15 of the connection traces 15. Finally, the first unit column group 131 (the light-emitting units 13 in the 1st to 18th columns) and the first circuit column group 141 (the pixel driving circuits 14 in the 1st to 18th columns) are electrically connected through the first connection trace 151, the second unit column group 132 (the light-emitting units 13 in the 19th to 36th columns) and the third circuit column group 143 (the pixel driving circuits 14 in the 32nd to 50th columns) are electrically connected through the second connection trace 152, and the third unit column group 133 (the light-emitting units 13 in the 37th to 40th columns) and the second circuit column group 142 (the pixel driving circuits 14 in the 19th to 31st columns) are electrically connected through the third connection trace 153.

[0057] In this embodiment, one end of at least one of the plurality of connection traces 15 is electrically connected to at least one light-emitting unit 13, and the other end is electrically connected to at least one pixel driving circuit 14. That is, one end of at least one of the plurality of connection traces 15 is located in the secondary display area 11, and the other end is located in the transition display area 12. That is, at least one of the plurality of connection traces 15 extends from the secondary display area 11 to the transition display area 12. In this way, the light-emitting unit 13 located in the secondary display area 11 can be electrically connected to the pixel driving circuit 14 located in the transition display area 12. The plurality of connection traces 15 are used to provide driving signals to the plurality of light-emitting units 13 respectively.

[0058] In some examples, only the anodes of the light-emitting units 13 in the secondary display area 11 are opaque. That is, the connection traces 15 for driving the light-emitting units 13 are set as transparent traces. In this case, not only can the transmittance of the secondary display area 11 be further improved, but also the diffraction caused by each component in the secondary display area 11 can be reduced.

[0059] As Figures 6(1) to 6(3) shown, the first connection trace 151 and the third connection trace 153 can be arranged in the same transparent conductive layer, that is, the first transparent conductive layer ITO1, and then the second connection trace 152 is arranged in another transparent conductive layer, that is, the second transparent conductive layer ITO2. Among them, Fig. 6(1) is a wiring schematic diagram when the ITO1 layer and the ITO2 layer are stacked, Fig. 6(2) is a wiring schematic diagram of the ITO2 layer, and Fig. 6(3) is a wiring schematic diagram of the ITO1 layer. In this embodiment, the first connection trace 151 and the second connection trace 152 are linearly arranged in their respective layers to connect the light-emitting units 13 in the 1st column to the 36th column with the corresponding pixel driving circuits 14. The third connection trace 153 needs to be routed smoothly without affecting the overall effect and at the same time reduce the wiring length. For this reason, since the shape of the secondary display area 11 can generally be roughly circular or elliptical. Specifically, generally, the secondary display area 11 satisfies that its area gradually increases from the edge to the center in the first direction X and the second direction Y, so that the secondary display area 11 can be in the shape of a circle, an ellipse, a rhombus, etc. Of course, in some embodiments, when the secondary display area 11 is set as a circle or an ellipse, the light-emitting area of the light-emitting device of each sub-pixel of each light-emitting unit 13 can be increased, so as to increase the service life of the light-emitting device of each sub-pixel in the secondary display area 11. Furthermore, generally, the secondary display area 11 can be set as a circle. Furthermore, as Figure 5 shown, since the secondary display area 11 is circular, with Figure 5Taking the upper left quarter circle as an example, it is divided into 40 columns in the first direction X and 20 rows in the second direction Y. For the 1st to 8th rows corresponding to it, since the radian change of the secondary display area 11 is relatively small, all columns of the light-emitting units 13 need to be set. Starting from the 9th row, due to the radian change of the secondary display area 11, some light-emitting units 13 can be omitted. In the example, for the 9th to 12th rows, the light-emitting units 13 in the first 4 columns are reduced, for the 13th to 14th rows, the light-emitting units 13 in the first 8 columns are reduced, for the 15th to 16th rows, the light-emitting units 13 in the first 12 columns are reduced, and so on, and are specifically set according to the specific application scenario. Thus, as Figures 4 to 6(3) shown in the specific embodiment, for the first connection trace 151 of the 9th row, it itself has 4 fewer connection traces corresponding to the 1st to 4th columns. Thus, for the third connection trace 153 corresponding to the 1st row (the third connection trace 153 corresponds to the connection traces of 4 columns from the 37th to 40th columns) can be parallel to the first connection trace 151 corresponding to the 9th row (i.e., the y-th row), and extend from the transition display area 12 along the first direction X to the secondary display area 11, and so on. Finally, the third connection traces 153 of the 1st to 4th rows are parallel to the first connection traces 151 of the 9th to 12th rows, and extend from the transition display area 12 to the secondary display area 11. The third connection traces 153 of the 5th and 6th rows are parallel to the first connection trace 151 of the 13th row, and extend from the transition display area 12 to the secondary display area 11. Here, since the light-emitting units 13 corresponding to the 13th and 14th rows continue to change due to the range of the secondary display area, the light-emitting units 13 in these two rows are reduced by 8, and then so on, and are specifically set according to the specific application scenario. That is, multiple pixel driving circuits 14 are distributed in multiple rows along the second direction Y, at least one row of the third connection traces 153 extends along the second direction Y to the y-th row, and is parallel to the first connection trace 151 of the y-th row, and extends along the first direction X to the secondary display area 11, where y≥2, and the first direction X intersects the second direction Y.

[0060] Finally, as Figure 7As shown, it is a comparison chart of the length of each column connection trace 15 and the capacitance (C) of the corresponding light-emitting unit 13 between the existing solution and the solution of this embodiment. The capacitance unit fF represents the total capacitance of the corresponding length on one connection trace 15. It can be seen that this solution exchanges the length of the connection traces 15 of a small number of other columns for a large amount of the length of the connection traces 15 of columns 37 to 40, thereby making the length of the overall connection traces 15 more balanced, reducing the overall length of the connection traces, and reducing the probability of capacitance mutation. Of course, in the above embodiment, for the number of columns, rows, corresponding column group allocation, etc. of the light-emitting unit 13 and the pixel driving circuit 14, specific settings can be made according to the specific application scenario. The number of columns of the light-emitting unit 13 can be set to 50 columns, 60 columns or even more, the number of rows can be set to 25 rows, 30 rows, etc., and the column group allocation can also be specifically allocated according to the specific solution. For example, in one embodiment, according to the arc change of the secondary display area 11, 5 or 6 light-emitting units 13 can be reduced in the 12th row. Furthermore, the third unit column group 133 can be set to the last 5 or 6 light-emitting units 13, while adjusting the first unit column group 131 and the second unit column group 132, and adjusting the circuit column group accordingly. The third connection trace 153 corresponding to the 1st row is parallel to the first connection trace 151 corresponding to the 12th row and extends from the transition display area 12 to the secondary display area 11 along the first direction X.

[0061] As can be seen from the above, a display panel provided by this application includes: a secondary display area and a transition display area; a plurality of light-emitting units; a plurality of pixel driving circuits; a plurality of connection traces; wherein, the plurality of light-emitting units are distributed in multiple columns; the plurality of pixel driving circuits are distributed in multiple columns; the first unit column group is connected to the first circuit column group through the first connection trace, the second unit column group is connected to the third circuit column group through the second connection trace, and the third unit column group is connected to the second circuit column group through the third connection trace; the third connection trace and the first connection trace extend between the two display areas together. In this way, by adjusting the positions of the driving circuits of different light-emitting units, the pixel driving circuit located in the middle of the secondary display area is arranged in the second circuit column group, and the third connection trace for connection is routed by walking together with the first connection traces of other rows, thereby reducing the length of the third connection trace, reducing the probability of capacitance mutation, and improving the product yield.

[0062] In an optional embodiment, as Figures 4 to 6(3) shown, the plurality of light-emitting units 13 are arranged in n columns along the first direction X, n is a positive integer, and the light-emitting units 13 in the first column are located on one side edge of the secondary display area 11 close to the transition display area 12;

[0063] The first unit column group 131 includes the light-emitting units 13 located in columns 1 to n1, the second unit column group 132 includes the light-emitting units 13 located in columns n1 + 1 to n2, and the third unit column group 133 includes the light-emitting units 13 located in columns n2 + 1 to n; where 1 < n1 < n2 < n, and both n1 and n2 are positive integers;

[0064] The multiple pixel driving circuits 14 are arranged in m columns along the first direction X, where m is a positive integer. The pixel driving circuit 14 in the first column is located on one side edge of the transition display area 12 close to the secondary display area 11;

[0065] The first circuit column group 141 includes the pixel driving circuits 14 located in columns 1 to m1, the second circuit column group 142 includes the pixel driving circuits 14 located in columns m1 + 1 to m2, and the third circuit column group 143 includes the pixel driving circuits 14 located in columns m2 + 1 to m; where 1 < m1 < m2 < m, and both m1 and m2 are positive integers.

[0066] In this embodiment, n can be 40, n1 can be 18, n2 can be 36, m can be 50, m1 can be 18, and m2 can be 31. Among them, as shown in FIG. 6(3), some columns in the second circuit column group 142 are required for the routing of the third connection trace 153, and the routing of the corresponding third connection trace 153 in the secondary display area 11 can utilize the space of the light-emitting units 13 in columns 19 to 36 (the second connection traces 152 corresponding to the light-emitting units 13 in columns 19 to 36 are on another layer, the second transparent conductive layer ITO2), so that a dedicated routing space does not need to be set for it.

[0067] In an alternative embodiment, as Figures 6(1) to 6(3) shown, the first connection trace 151 and the third connection trace 153 are located in the first transparent conductive layer ITO1, and the second connection trace 152 is located in the second transparent conductive layer ITO2. Thus, in the embodiment of the present application, the multiple connection traces can be arranged in at most two transparent conductive layers. In this way, the number of mask plates can be reduced, and the production cost can be lowered.

[0068] In an alternative embodiment, the first transparent conductive layer ITO1 and the second transparent conductive layer ITO2 each include a transparent conductive material.

[0069] In this embodiment, the transparent conductive material may be selected from transparent metal oxides such as indium tin oxide (ITO) and indium zinc oxide (IZO). That is to say, in the embodiments of the present application, the connection traces 15 (including the first connection trace 151, the second connection trace 152, and the third connection trace 153) are transparent conductive traces. In this way, the transmittance of the secondary display area 11 and the signal-to-noise ratio of the image output by the sensor can be further improved, and diffraction caused by non-transparent traces can also be avoided, thereby further improving the quality of the image output by the sensor.

[0070] In an alternative embodiment, as Figures 6(1) to 6(3) shown, both the first connection trace 151 and the second connection trace 152 extend along the first direction X through the secondary display area 11 and the transition display area 12. In this way, without adjusting the positions of the corresponding light-emitting units 13 and pixel driving circuits 14, the trace lengths of the first connection trace 151 and the second connection trace 152 can be minimized.

[0071] In an alternative embodiment, as Figures 4 to 6(3) shown, the plurality of light-emitting units 13 are arranged in p rows along the second direction Y from the edge to the center of the secondary display area 11, where p is a positive integer, and the light-emitting units 13 in the p-th row are located on one edge of the secondary display area 11 extending along the second direction Y; the plurality of pixel driving circuits 14 are correspondingly arranged in p rows with the plurality of light-emitting units 13;

[0072] At least one connection trace 15 among the plurality of connection traces 15 is used to connect the light-emitting units 13 and the corresponding pixel driving circuits 14 in the same row.

[0073] In this embodiment, as Figure 5 shown, taking the quarter circle at the upper left corner of the secondary display area 11 as an example, its first row is the bottom row of this area, and its p-th row (the 20th row in the figure) is the top row of this area, and the pixel driving circuits 14 are set similarly.

[0074] In an alternative embodiment, as Figures 6(1) to 6(3) shown, the third connection trace 153 includes: a first portion 1531, a second portion 1532, a third portion 1533, a fourth portion 1534, and a fifth portion 1535; the first portion 1531 extends along the first direction X in the transition display area 12, the second portion 1532 extends along the second direction Y in the transition display area 12, the third portion 1533 extends from the transition display area 12 along the first direction X to the secondary display area 11, the fourth portion 1534 extends along the second direction Y in the secondary display area 11, and the fifth portion 1535 extends along the first direction X in the secondary display area 11.

[0075] In this embodiment, the third part 1533 of the third connection trace 153 corresponding to each row of light-emitting units 13 and the first connection trace 151 corresponding to the light-emitting units 13 in other rows or the same row extend from the transition display area 12 to the secondary display area 11 together. For example, in this embodiment, the third part 1533 of the third connection trace 153 corresponding to the light-emitting units 13 in the first row and the first connection trace 151 of the light-emitting units 13 in the eighth row extend from the transition display area 12 to the secondary display area 11 together. Which row's first connection trace 151 it specifically runs together with can be determined according to the number of light-emitting units 13 in each row or the number of corresponding first connection traces. As Figures 6(1) to 6(3) shown, the second part 1532 of the third connection trace 153 runs in the second direction Y in the transition display area 12, and it runs on the virtual (dummy) circuit in the transition display area 12. Here, the corresponding ITO film layer on the virtual (dummy) circuit can be removed to ensure that more second parts 1532 of the third connection trace 153 can pass through the virtual (dummy) circuit, saving space.

[0076] In an alternative embodiment, as Figure 4 、 Figure 5 shown, the secondary display area 11 gradually increases in area from the edge to the center along the first direction X; the secondary display area 11 gradually increases in area from the edge to the center along the second direction Y.

[0077] In some embodiments, the shape of the secondary display area 11 can be circular, oval, rhombic, etc., but the embodiments of the present application are not limited thereto. Of course, in some embodiments, when the secondary display area 11 is set to be circular or oval, the light-emitting area of the light-emitting device of each sub-pixel of the light-emitting unit 13 can be increased, thereby increasing the service life of the light-emitting device of each sub-pixel in the secondary display area 11. Generally, the secondary display area 11 can be set to be circular.

[0078] In an alternative embodiment, for the third connection trace 153 in each row of the third unit column group 133, it extends from the transition display area 12 to the secondary display area 11 together with the first connection trace 151 of the current row number plus q rows; where q is a natural number, and q is determined according to the row number of the third connection trace 153.

[0079] In this embodiment, the q value corresponding to the 1st to 5th rows is 8, the q value corresponding to the 6th and 7th rows is 7, the q value corresponding to the 8th and 9th rows is 6, the q value corresponding to the 10th row is 5, the q value corresponding to the 11th and 12th rows is 4, the q value corresponding to the 13th row is 3, the q value corresponding to the 14th and 15th rows is 2, the q value corresponding to the 16th row is 1, and the q value corresponding to the 17th to 20th rows is 0. In a specific embodiment, as Figure 5 shown, since the secondary display area 11 is circular, taking the upper left quarter circle in Figure 5 as an example, it is divided into 40 columns in the first direction X and 20 rows in the second direction Y. For the 1st to 8th rows corresponding to it, since the radian change of the secondary display area 11 is small, all columns of the light emitting units 13 need to be set. Starting from the 9th row, due to the radian change of the secondary display area 11, some light emitting units 13 can be omitted. In the example, the light emitting units 13 in the first 4 columns are reduced from the 9th to 12th rows, the light emitting units 13 in the first 8 columns are reduced from the 13th to 14th rows, and the light emitting units 13 in the first 12 columns are reduced from the 15th to 16th rows, and so on. And in a specific application scenario, the q value of each row is adjusted accordingly.

[0080] In an alternative embodiment, the secondary display area 11 is a circular secondary display area.

[0081] In an alternative embodiment, as shown in FIG. 6(1), the secondary display area 11 and the transition display area 12 are disposed on the substrate 1; the positive projections of the first connection trace 151, the second connection trace 152, and the third connection trace 153 on the substrate 1 at least partially overlap.

[0082] In an alternative embodiment, the plurality of light emitting units 13 are a plurality of red sub-pixel light emitting units, a plurality of green sub-pixel light emitting units, and a plurality of blue sub-pixel light emitting units which are spaced apart.

[0083] In this embodiment, each light emitting unit 13 can be a variety of sub-pixel light emitting units. In some embodiments, the light emitting unit 13 can further be a plurality of sub-pixels, such as a red sub-pixel light emitting unit, a green sub-pixel light emitting unit, and a blue sub-pixel light emitting unit.

[0084] It should be noted that the embodiments of the present application are described by taking red, green, and blue as examples. However, the embodiments of the present application are not limited thereto. That is to say, each light emitting unit 13 can be a sub-pixel of one color, such as a first color sub-pixel light emitting unit, a second color sub-pixel light emitting unit, and a third color sub-pixel light emitting unit, and the first color, the second color, and the third color are different from each other.

[0085] In an optional embodiment, the plurality of light-emitting units 13 are distributed in multiple rows along the second direction Y, and the plurality of red sub-pixel light-emitting units, the plurality of green sub-pixel light-emitting units, and the plurality of blue sub-pixel light-emitting units are arranged at intervals in each row.

[0086] Based on the same concept, as Figure 1 , Figure 2 shown, the present application further provides a display device, including a display panel 10 as described in any of the foregoing embodiments; and a sensor 2001 disposed on the backlight side of the display panel 10, where the sensor 2001 and the secondary display area 11 of the display panel 10 have at least partial overlap in the orthographic projection on the substrate 1 of the display panel 10.

[0087] The display device of the above embodiment is used to apply the corresponding display panel in the foregoing embodiment, and has the beneficial effects of the embodiment of the corresponding display panel, which will not be elaborated herein.

[0088] Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is only exemplary, and is not intended to imply that the scope of the present application (including the claims) is limited to these examples; under the idea of the present application, the technical features between the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the embodiments of the present application as described above, and they are not provided in detail for the sake of brevity.

[0089] In addition, for simplicity of explanation and discussion, and in order not to make the embodiments of the present application difficult to understand, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. In addition, the device may be shown in block diagram form to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present application are to be implemented (i.e., these details should be fully within the understanding of those skilled in the art). In the case where specific details (such as circuits) are set forth to describe the exemplary embodiments of the present application, it will be apparent to those skilled in the art that the embodiments of the present application can be implemented without these specific details or with variations of these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0090] Although the present application has been described in connection with specific embodiments of the present application, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. For example, other memory architectures (such as dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0091] Embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. A display panel, characterized in that, Comprising: A secondary display area and a transition display area, at least part of the transition display area being disposed around the secondary display area; A plurality of light-emitting units, arranged in an array in a first direction and a second direction in the secondary display area; A plurality of pixel driving circuits, arranged in an array in a first direction and a second direction in the transition display area, at least part of the pixel driving circuits driving the plurality of light-emitting units to emit light respectively through a plurality of connection traces; Wherein, the plurality of light-emitting units are distributed in multiple columns in the first direction to form a plurality of unit column groups, the plurality of unit column groups including a first unit column group, a second unit column group, and a third unit column group arranged from the edge to the center of the secondary display area; the plurality of pixel driving circuits are distributed in multiple columns in the first direction to form a plurality of circuit column groups, the plurality of circuit column groups including a first circuit column group, a second circuit column group, and a third circuit column group arranged from near to far from the secondary display area; the light-emitting units of the first unit column group are connected to the pixel driving circuits of the first circuit column group through a first connection trace, the light-emitting units of the second unit column group are connected to the pixel driving circuits of the third circuit column group through a second connection trace, and the light-emitting units of the third unit column group are connected to the pixel driving circuits of the second circuit column group through a third connection trace; the plurality of pixel driving circuits are distributed in multiple rows in the second direction, at least one row of the third connection traces extends in the second direction to the y-th row and is parallel to the first connection trace of the y-th row, and extends in the first direction to the secondary display area, where y≥2, and the first direction intersects the second direction.

2. The display panel according to claim 1, wherein: The plurality of light-emitting units are arranged in n columns in the first direction, n being a positive integer, and the light-emitting units of the first column are located on one side edge of the secondary display area close to the transition display area; The first unit column group includes the light-emitting units located in the 1st to n1-th columns, the second unit column group includes the light-emitting units located in the (n1 + 1)-th to n2-th columns, and the third unit column group includes the light-emitting units located in the (n2 + 1)-th to n-th columns; wherein, 1 < n1 < n2 < n, and both n1 and n2 are positive integers; The plurality of pixel driving circuits are arranged in m columns in the first direction, m being a positive integer, and the pixel driving circuits of the first column are located on one side edge of the transition display area close to the secondary display area; The first circuit column group includes the pixel driving circuits located in the 1st to m1-th columns, the second circuit column group includes the pixel driving circuits located in the (m1 + 1)-th to m2-th columns, and the third circuit column group includes the pixel driving circuits located in the (m2 + 1)-th to m-th columns; wherein, 1 < m1 < m2 < m, and both m1 and m2 are positive integers.

3. The display panel according to claim 1, wherein The first connection trace and the third connection trace are located in a first transparent conductive layer, and the second connection trace is located in a second transparent conductive layer.

4. The display panel according to claim 3, wherein, The first transparent conductive layer and the second transparent conductive layer respectively include a transparent conductive material.

5. The display panel according to claim 1, wherein Both the first connection trace and the second connection trace extend in a first direction through the sub-display area and the transition display area.

6. The display panel according to claim 1, wherein The plurality of light-emitting units are arranged in p rows along the second direction from the edge to the center of the sub-display area, where p is a positive integer, and the light-emitting units in the p-th row are located at one edge of the sub-display area extending along the second direction. The plurality of pixel driving circuits are correspondingly arranged in p rows with the plurality of light-emitting units. At least one connection trace among the plurality of connection traces is used to connect the light-emitting units and the corresponding pixel driving circuits in the same row.

7. The display panel according to claim 6, wherein The third connection trace includes: a first portion, a second portion, a third portion, a fourth portion, and a fifth portion; the first portion extends in the first direction in the transition display area, the second portion extends in the second direction in the transition display area, the third portion extends from the transition display area to the sub-display area in the first direction, the fourth portion extends in the second direction in the sub-display area, and the fifth portion extends in the first direction in the sub-display area.

8. The display panel according to claim 6, characterized in that, The sub-display area gradually increases in area from the edge to the center along the first direction; the sub-display area gradually increases in area from the edge to the center along the second direction.

9. The display panel according to claim 8, wherein, For each row of the third connection traces in the third unit column group, they extend from the transition display area to the sub-display area together with the first connection traces of the current row number plus q rows; where q is a natural number, and q is determined according to the row number of the third connection trace.

10. The display panel according to claim 8, characterized in that, The sub-display area is a circular sub-display area.

11. The display panel according to claim 1, characterized in that, The sub-display area and the transition display area are provided on a substrate; at least a part of the orthographic projections of the first connection trace, the second connection trace, and the third connection trace on the substrate overlap.

12. The display panel according to claim 1, wherein The plurality of light-emitting units are a plurality of red sub-pixel light-emitting units, a plurality of green sub-pixel light-emitting units, and a plurality of blue sub-pixel light-emitting units arranged at intervals.

13. The display panel according to claim 12, wherein The plurality of light-emitting units are distributed in multiple rows along the second direction, and the plurality of red sub-pixel light-emitting units, the plurality of green sub-pixel light-emitting units, and the plurality of blue sub-pixel light-emitting units are arranged at intervals in each row.

14. A display device, characterized in that, Comprising: The display panel according to any one of claims 1 to 13; And a sensor provided on the backlight side of the display panel, where the sensor at least partially overlaps with the orthographic projection of the sub-display area of the display panel on the substrate of the display panel.

Images