Patent Publication Number: US-2023152628-A1

Title: Display panel and display device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims priority to Chinese Patent Application No. 202210857594.2, filed on Jul. 20, 2022, the content of which is incorporated herein by reference in its entirety. 
     Technical Field 
     The present disclosure relates to the field of display technology, and in particular, to a display panel, a method for manufacturing the display panel, a display device, and a method for manufacturing the display device. 
     BACKGROUND 
     With the development of display technology, flat display devices such as a liquid crystal display (LCD) panel have the advantages of high quality, power saving and wide application range, and thus are widely used in various electronic products such as in mobile phones, TVs, digital cameras, notebooks. Flat display devices have become the mainstream of display devices. However, the existing display panel has the problems of large thickness and excessive weight. 
     SUMMARY 
     In view of this, embodiments of the present disclosure provide a display panel, a method for manufacturing the display panel, a display device, and a method for manufacturing the display device, for reducing the thickness of the display panel and reducing the weight of the display panel. 
     In a first aspect, an embodiment of the present disclosure provides a display panel including a base having a first side and a second side oppositely arranged along a thickness direction of the base, a display driving circuit located at the first side of the base, and a backlight driving circuit located at the second side of the base. The display driving circuit includes a first thin film transistor. The backlight driving circuit is configured to drive the backlight source to emit light; and includes a second thin film transistor. 
     In a second aspect, an embodiment of the present disclosure provides a display device, including: a backlight source, a reflective layer and the display panel described above. The backlight source includes a light-emitting element, and the light-emitting element is electrically connected to the backlight driving circuit. A light-exiting surface of the light-emitting element is located at a side of the light-emitting element away from the base. The reflective layer is located at the side of the light-emitting element away from the base. 
     In a third aspect, an embodiment of the present disclosure provides a method for manufacturing a display panel. The display panel includes an array substrate, and the method for manufacturing the array substrate includes: providing a base, the base having a first side and a second side disposed oppositely along a thickness direction of the base; forming a display driving circuit at the first side of the base, the display driving circuit including a first thin film transistor; forming a backlight driving circuit at the second side of the base to obtain the array substrate including the backlight driving circuit, the display driving circuit and the base. The backlight driving circuit is configured to drive a backlight source to emit light, and includes a second thin film transistor. 
     In a fourth aspect, an embodiment of the present disclosure provides a method for manufacturing a display device, and the method includes: providing an array substrate manufactured by the method in the third aspect and a color filter substrate; cell-assembling the color filter substrate and the array substrate to obtain a display motherboard; cutting the display motherboard to obtain a display panel; and forming the backlight source at a side of the backlight driving circuit in the display panel away from the base to obtain the display device. The backlight source includes a light-emitting element, and the light-emitting element is electrically connected to the backlight driving circuit. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       In order to better illustrate technical solutions in embodiments of the present disclosure, the accompanying drawings used in the embodiments and in the related art are briefly introduced as follows. It should be noted that the drawings described as follows are merely part of the embodiments of the present disclosure, and other drawings can also be acquired by those skilled in the art. 
         FIG.  1    is a schematic cross-sectional view of a display panel according to an embodiment of the present disclosure; 
         FIG.  2    is a schematic cross-sectional view of another display panel according to an embodiment of the present disclosure; 
         FIG.  3    is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure; 
         FIG.  4    is a schematic cross-sectional view of a display device in the related art; 
         FIG.  5    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure; 
         FIG.  6    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  7    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  8    is a schematic cross-sectional view of a light-emitting element according to an embodiment of the present disclosure; 
         FIG.  9    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  10    is a schematic diagram of a light path of light that is emitted from the light-emitting element, propagates along a direction perpendicular to the light-exiting surface of the light-emitting element, and is reflected by the reflective layer; 
         FIG.  11    is a schematic cross-sectional view of a carrier layer according to an embodiment of the present disclosure; 
         FIG.  12    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  13    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  14    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  15    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  16    is a schematic perspective view of a light-emitting element according to an embodiment of the present disclosure; 
         FIG.  17    is a schematic perspective view of another light-emitting element according to an embodiment of the present disclosure; 
         FIG.  18    is schematic perspective view of yet another light-emitting element according to an embodiment of the present disclosure; 
         FIG.  19    is schematic perspective view of yet another light-emitting element according to an embodiment of the present disclosure; 
         FIG.  20    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  21    is a schematic cross-sectional view of yet another carrier layer according to an embodiment of the present disclosure; 
         FIG.  22    is a schematic cross-sectional view of yet another light-emitting element according to an embodiment of the present disclosure; 
         FIG.  23    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  24    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  25    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  26    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  27    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  28    is a schematic cross-sectional view of yet another display device according to an embodiment of the present disclosure; 
         FIG.  29    is a schematic flowchart of a method for manufacturing an array substrate according to an embodiment of the present disclosure; 
         FIG.  30    is a schematic flowchart of a method for manufacturing a display device according to an embodiment of the present disclosure; 
         FIG.  31    is a schematic structural flow diagram corresponding to  FIG.  30   ; and 
         FIG.  32    is a schematic flowchart of another method for manufacturing a display device according to an embodiment of the present disclosure. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     For better illustrating technical solutions of the present disclosure, embodiments of the present disclosure will be described in detail as follows with reference to the accompanying drawings. 
     It should be noted that, the described embodiments are merely exemplary embodiments of the present disclosure, which shall not be interpreted as providing limitations to the present disclosure. All other embodiments obtained by those skilled in the art according to the embodiments of the present disclosure are within the scope of the present disclosure. 
     The terms used in the embodiments of the present disclosure are merely for the purpose of describing particular embodiments but not intended to limit the present disclosure. Unless otherwise noted in the context, the singular form expressions “a”, “an”, “the” and “said” used in the embodiments and appended claims of the present disclosure are also intended to represent plural form expressions thereof. 
     It should be understood that the term “and/or” used herein is merely an association relationship describing associated objects, indicating that there may be three relationships, for example, A and/or B may indicate that three cases, i.e., A existing individually, A and B existing simultaneously, B existing individually. In addition, the character “/” herein generally indicates that the related objects before and after the character form an “or” relationship. 
     It should be understood that although the thin film transistor may be described using the terms of “first”, “second”, etc., in the embodiments of the present disclosure, the thin film transistor will not be limited to these terms. These terms are merely used to distinguish thin film transistors from one another. For example, without departing from the scope of the embodiments of the present disclosure, a first thin film transistor may also be referred to as a second thin film transistor, similarly, a second thin film transistor may also be referred to as a first thin film transistor. 
     An embodiment of the present disclosure provides a display panel. As shown in  FIG.  1   , which is a schematic cross-sectional view of a display panel according to an embodiment of the present disclosure, the display panel  1000  includes an array substrate  100  and a color filter substrate  200  that are opposite to each other, and a liquid crystal layer  300  located between the array substrate  100  and the color filter substrate  200 . 
     As shown in  FIG.  1   , the array substrate  100  includes a base  10 , and the base  10  includes a first side and a second side that are opposite to each other in a thickness direction of the base  10 . For example, the first side of the base  10  refers to a side adjacent to the color filter substrate  200 , and the second side of the base  10  refers to a side away from the color filter substrate  200 . As shown in  FIG.  1   , a display driving circuit  2  is provided at the first side of the base  10 , and the display driving circuit  2  includes a first thin film transistor  31 . 
       FIG.  2    is a schematic cross-sectional view of another display panel according to an embodiment of the present disclosure. For example, as shown in  FIG.  1    and  FIG.  2   , the display panel  1000  further includes a pixel electrode  21  and a common electrode  22 , and the pixel electrode  21  is located at a side of the display driving circuit  2  away from the base  10 . The first thin film transistor  31  in the display driving circuit  2  is electrically connected to the pixel electrode  21 . The display driving circuit  2  is configured to supply an electrical signal to the pixel electrode  21 . The liquid crystal layer  300  is deflected under an action of a voltage difference between the pixel electrode  21  and the common electrode  22 . 
     As shown in  FIG.  1    and  FIG.  2   , a backlight driving circuit  4  is provided at the second side of the base  10 , and the backlight driving circuit  4  is configured to drive a backlight source (not shown in  FIG.  1    and  FIG.  2   ) to emit light. For example, the backlight driving circuit  4  includes a second thin film transistor  32 . The first thin film transistor  31  and the second thin film transistor  32  each include a gate electrode  301 , a source electrode  302 , a drain electrode  303  and a semiconductor layer  304 . It should be noted that a structure of the first thin film transistor  31  and a structure of the second thin film transistor  32  shown in  FIG.  2    are merely illustrative. In some embodiments of the present disclosure, the structure of the first thin film transistor  31  may be the same as the structure of the second thin film transistor  32 . For example, both the first thin film transistor  31  and the second thin film transistor  32  are arranged in a gate-top structure or a gate-bottom structure. Alternatively, the structure of the first thin film transistor  31  may be different from the structure of the second thin film transistor  32 , for example, one of the first thin film transistor  31  and the second thin film transistor  32  has a gate-top structure, and the other one of the first thin film transistor  31  and the second thin film transistor  32  has a gate-bottom structure. The present disclosure does not limit this. 
     It should be noted that positions of the pixel electrode  21  and the common electrode  22  shown in  FIG.  2    are merely illustrative. In some embodiments of the present disclosure, the positions of the pixel electrode  21  and the common electrode  22  in the display panel  1000  can be adjusted according to different design requirements. The present disclosure does not limit this. For example, the common electrode  22  may be arranged at a side of the pixel electrode  21  adjacent to the liquid crystal layer  300 , or the common electrode  22  and the pixel electrode  21  can be arranged at two opposite sides of the liquid crystal layer  300 , respectively. 
     When the display panel  1000  works, the backlight driving circuit  4  drives the backlight source (not shown in  FIG.  1    and  FIG.  2   ) to emit light, and the light emitted from the backlight source is directed to the liquid crystal layer  300  in the display panel  1000 . The liquid crystal layer  300  is deflected under control of the display driving circuit  2 , thereby modulating the light emitted from the backlight source, so that the sub-pixels at the corresponding positions in the display panel function within a target gray scale. 
     In the display panel  1000  provided by some embodiments of the present disclosure, the display driving circuit  2  and the backlight driving circuit  4  are provided at the first side and the second side of the base  10  respectively, therefore, there is no need to provide different carrier substrates for the display driving circuit  2  and the backlight driving circuit  4  respectively, which is beneficial to reducing the thickness of the display panel  1000  and reducing the weight of the display panel  1000 . 
     Some embodiments of the present disclosure further provide a display device. As shown in  FIG.  3   , which is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure, the display device includes a backlight source, a reflective layer  6  and the display panel  1000  described above. The backlight source is located at a side of the backlight driving circuit  4  away from the base  10 . The backlight source includes a light-emitting element  50 . For example, the light-emitting element  50  includes a mini light-emitting diode (Mini LED), and the mini LED has a size about 200 µm, which is one-fifth of a conventional LED. Using the mini LED as the backlight source, more light-emitting elements can be arranged within the display device, which is beneficial for achieving precise light adjustment and for improving the overall brightness of the display device. The light-emitting element  50  and the backlight driving circuit  4  in the display panel  1000  are electrically connected to each other. In some embodiments of the present disclosure, a light-exiting surface of the light-emitting element  50  is located at a side of the light-emitting element  50  away from the backlight driving circuit  4 . 
     As shown in  FIG.  3   , the reflective layer  6  is located at a side of the light-emitting element  50  away from the base  10 . For example, as shown in  FIG.  3   , in some embodiments of the present disclosure, an orthographic projection of the reflective layer  6  onto a plane of the light-emitting element  50  can cover the light-emitting element  50 , and the orthographic projection of the reflective layer  6  onto the plane of the light-emitting element  50  can cover a gap between two adjacent light-emitting elements  50 . For example, a material of the reflective layer  6  includes silver, aluminum or other material with higher reflectivity. 
     When the display device works, the light-emitting element  50  emits light. The light emitted from the light-emitting element  50  is directed to the reflective layer  6  and then reflected by the reflective layer  6 . As shown in  FIG.  3   , the light reflected by the reflective layer  6  is directed to a light-exiting side of the display panel  1000 . After being modulated by the liquid crystal layer of the display panel  1000 , each pixel in the display device is lit with a target gray scale. 
     In the display device provided by the embodiments of the present disclosure, the display driving circuit  2  and the backlight driving circuit  4  are provided at the first side and the second side of the substrate  10  of the display panel  1000  respectively, therefore, there is no need to provide different carrier substrates for the display driving circuit  2  and the backlight driving circuit  4  respectively.  FIG.  4    is a schematic cross-sectional view of a conventional display device. The display device includes an array substrate  100 ′, a color filter substrate  200 ′, a liquid crystal layer  300 ′ and a backlight module  400 ′. The array substrate  100 ′ includes a first base  10 ′ and a display driving circuit  2 ′. The backlight module  400 ′ includes a second base  20 ′, a backlight driving circuit  4 ′, and a backlight source  3 ′. In the conventional display device in  FIG.  4   , the backlight source  3 ′ and the backlight driving circuit  4 ′ need to be formed on the second base  20 ′ to obtain the backlight module  400 ′, and then the backlight module  400 ′ is attached to a side of the array substrate  100 ′ away from the liquid crystal layer  300 ′. In this case, not only the process thereof is complicated, but also the overall thickness of the display device is too large since the thicknesses of the first base  10 ′ and the thickness of the second base  20 ′ are both large. According to the technical solutions in the embodiments of the present disclosure, the first base  10 ′ is reused as the carrier substrate for carrying the backlight driving circuit  4 ′, therefore, there is no need to additionally provide the second base  20 ′, which is beneficial to reducing the thickness of the display device and reducing the weight of the display device, thereby reducing the cost of the display device and realizing thinness and lightness of the terminal product. Moreover, according to the technical solutions in the embodiments of the present disclosure, the alignment and attachment operation for the display driving circuit  2  and the backlight driving circuit  4  can be omitted, which is beneficial for simplifying the process for manufacturing the display device. 
     In addition, in the embodiments of the present disclosure, the light-exiting surface of the light-emitting element  50  is arranged at a side of the light-emitting element  50  away from the base  10 , and the reflective layer  6  is arranged at the side of the light-emitting element  50  away from the base  10 , so that electrical connection of the light-emitting element  50  and the backlight driving circuit  4  that is located at the second side of the base  10  can be achieved, and the light emitted from the light-emitting element  50  can be normally directed to the side where the light-exiting surface of the display panel  1000  is located, thereby ensuring the normal display of the display device. 
     In an example shown in  FIG.  3   , the display device further includes a flexible printed circuit (FPC)  20 , and the flexible printed circuit  20  is electrically connected to the backlight driving circuit  4  and the display driving circuit (not shown in  FIG.  3   ), respectively. When the display device works, an external control circuit transmits an electrical signal to the backlight driving circuit  4  and the display driving circuit through the flexible printed circuit  20 . 
       FIG.  5    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. In an example shown in  FIG.  5   , a plurality of microstructures  60  is provided at a side of the reflective layer  6  adjacent to the light-emitting element  50 . The light emitted from the light-emitting element  50  is directed to the microstructure  60  and then diffusely reflected at a surface of the microstructure  60 , so that the light directed to the light-exiting surface of the display panel  1000  can be more uniform. 
     It should be noted that a shape of the microstructure  60  shown in  FIG.  5    is merely illustrative. In the embodiments of the present disclosure, the shape of the microstructure  60  may be a triangular pyramid or a hemisphere, or other shape. The present disclosure does not limit this feature. 
       FIG.  6    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. In an embodiment shown in  FIG.  6   , a reflective bowl  61  is provided at a side of the reflective layer  6  adjacent to the light-emitting element  50 . The reflective bowl  61  has a recessed structure which is recessed towards a direction away from the light-emitting element  50 . The light emitted from the light-emitting element  50  can be reflected by the reflective bowl  61  after being directed to the reflective bowl  61 . The design of the reflective bowl  61  can make the reflected light diffuse in a variety of different propagation directions between the light-emitting element  50  and the reflective bowl  61 , which is beneficial to making the reflected light avoid a position of the light-emitting element  50  is located, thereby avoiding that the light-emitting element  50  blocks propagation of the reflected light. Moreover, the light reflected by the reflective bowl  61  has a wide propagation range, which can improve the uniformity of the brightness of the light directed to the display panel  1000  at different positions. 
     When designing the reflective bowl  61 , exemplarily, as shown in  FIG.  6   , in the embodiments of the present disclosure, the light-emitting element  50  can be arranged corresponding to a bottom of the reflective bowl  61 . As shown in  FIG.  6   , along a direction perpendicular to a plane of the display panel  1000 , a distance between the light-emitting element  50  and the reflective bowl  61  is L, a curvature radius of the reflective bowl  61  is R, and R&lt;L. A point O shown in  FIG.  6    represents a center of a sphere where the reflective bowl  61  is located. With such a configuration, on the one hand, it can ensure that there is an enough distance between the reflective bowl  61  and the light-emitting element  50 ; and on the other hand, it can avoid an excessive curvature radius R of the reflective bowl  61 . After the light emitted from the light-emitting element  50  is reflected by the reflective bowl  61 , the reflected light can be prevented from being confined in the space enclosed by the reflective bowl  61 , so that the reflected light can be directed to the display panel  1000  as much as possible, thereby improving the utilization of light. 
       FIG.  7    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. In an embodiment shown in  FIG.  7   , the display device further includes a convex lens  62 , and the convex lens  62  is located at a side of the reflective bowl  61  adjacent to the base  10 . The combination configuration of the convex lens  62  and the reflective bowl  61  enables the small-angle light emitted from the light-emitting element  50  to avoid the position of the light-emitting element  50  is located after being reflected. The small-angle light refers to the light emitted from the light-emitting element  50  that propagates in a direction adjacent to the normal of the display panel  1000 . 
     In an example, as shown in  FIG.  7   , a main optical axis  620  of the convex lens  62  corresponds to a center of the reflective bowl  61 , and both correspond to a center of the light-exiting surface of the light-emitting element  50 . The center of the reflective bowl  61  is a center of an orthographic projection of the reflective bowl  61  onto a plane of the reflective layer  6 . As shown in  FIG.  7   , taking the first light L 11  and the second light L 12  emitted from the light-emitting element  50  as an example, the first light L 11  and the second light L 12  are symmetrical with respect to a symmetry axis passing the center of the light-exiting surface of the light-emitting element  50 . The first light L 11  is reflected by the convex lens  62  and the reflective bowl  61  to form the first reflected light L 21 , and the second light L 12  is reflected by the convex lens  62  and the reflective bowl  61  to form the second reflected light L 22 . Both the first reflected light L 21  and the second reflected light L 22  can avoid the light-emitting element  50 . Moreover, in the embodiments of the present disclosure, the main optical axis  620  of the convex lens  62  corresponds to the center of the reflective bowl  61 , and both of the two correspond to the center of the light-exiting surface of the light-emitting element  50 , so that the first reflected light L 21  and the second reflected light L 22  directed to the light-exiting surface of the display panel  1000  can also be symmetrical with respect to a symmetry axis passing a center of the light-exiting surface of the light-emitting element  50 . Such a configuration can make the light directed to the light-exiting surface of the display panel  1000  more even. 
       FIG.  8    is a schematic cross-sectional view of a light-emitting element according to an embodiment of the present disclosure. Exemplarily, as shown in  FIG.  8   , the light-emitting element  50  has a light-exiting surface S 1  and an electrode connection surface S 2 . Exemplarily, the light-emitting element  50  may include a plurality of light-exiting surfaces S 1, and lights exit from the plurality of light-exiting surfaces S 1  have different intensities. Unless otherwise specified below, the light-exiting surface S 1  of the light-emitting element  50  refers to the surface of the light-emitting element  50  with the largest light-exiting intensity. Taking the light-emitting element  50  with a rectangular cross-section as shown in  FIG.  8    as an example, the light-exiting surface S 1  of the light-emitting element  50  refers to a surface arranged opposite from the electrode connecting surface S 2 . 
     At least one connection electrode  5  is provided at the electrode connection surface S 2  of the light-emitting element  50 . Exemplarily, as shown in  FIG.  8   , the at least one connection electrode  5  includes a first connection electrode  51  and a second connection electrode  52 . The light-emitting element  50  is electrically connected to the backlight driving circuit through the first connection electrode  51  and the second connection electrode  52 , to receive a driving signal provided by the backlight driving circuit. 
     Exemplarily, in a case where the light-emitting element  50  is provided in the display device, in some embodiments of the present disclosure, a non-zero angle is formed between the light-exiting surface S 1  of the light-emitting element  50  and the reflective layer  6 , so that the light emitted from the light-emitting element  50  and reflected by the reflective layer  6  can avoid the light-emitting element  50 , thereby avoiding that the light-emitting element  50  blocks the light directed to the display panel  1000 . 
     In an embodiment shown in  FIG.  9   , which is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure, an angle θ is formed between the light-exiting surface S 1  of the light-emitting element  50  and the plane of the reflective layer  6 , and 0°&lt;θ&lt;90°. With such a configuration, the light emitted from the light-emitting element  50  and reflected by the reflective layer  6  can avoid the light-emitting element  50 . In an example, as shown in  FIG.  9   , the light emitted from the light-emitting element  50  propagates along a direction perpendicular to the light-exiting surface S 1  of the light-emitting element  50 .  FIG.  10    is a schematic diagram of a light path of light that is emitted from the light-emitting element, propagates along a direction perpendicular to the light-exiting surface of the light-emitting element, and is reflected by the reflective layer. In combination with  FIG.  10   , the light-emitting element  50  show in  FIG.  9    can be equivalent to a point light source O1 shown in  FIG.  10   , and the light L 31  is light that propagates along a direction perpendicular to the light-exiting surface S 1  of the light-emitting element  50  shown in  FIG.  10   . In the embodiments of the present disclosure, an angle formed between the light-exiting surface S 1  of the light-emitting element  50  and the plane of the reflective layer  6  is equal to θ. Therefore, an incident angle of the light L 31  directed to the reflective layer  6  is also equal to θ. Correspondingly, a reflection angle of the reflected light L 32  reflected by the reflective layer  6  is also equal to θ. According to the triangular geometric relationship, when the reflected light L 32  is incident to the plane of the point light source O1, a distance D between the reflected light L 32  and the point light source O1 satisfies: D=2Htanθ. Therefore, when H&gt;0 and 0&lt;θ&lt;90°, D&gt;0. That is, the reflected light L 32  can avoid the light-emitting element  50  corresponding to the point light source O1. 
     Exemplarily, θ≤30° , so that an angle formed between the light-exiting surface S 1  of the light-emitting element  50  and the plane of the reflective layer  6  is not too large, which is beneficial to improving the intensity of the light emitted from the light-exiting surface S 1  of the light-emitting element  50  and received by the reflective layer  6 , thereby avoiding waste of the light emitted from the light-emitting element  50 . 
     Exemplarily, as shown in  FIG.  9   , the display device further includes a carrier layer  7  located between the light-emitting element  50  and the backlight driving circuit  4 , and the carrier layer  7  includes a recessed portion  70  located at a side of the carrier layer  7  away from the backlight driving circuit  4 . 
     Exemplarily, when forming the display device having the structure shown in  FIG.  9   , the carrier layer  7  including the recessed portion  70  may be formed first, and then the light-emitting element  50  may be formed. Referring to  FIG.  11   , which is a schematic cross-sectional view of a carrier layer according to an embodiment of the present disclosure, the carrier layer  7  includes a recessed portion  70 , and the recessed portion  70  includes a recessed surface S 3 . An angle formed between the recessed surface S 3  and the plane of the reflective layer is equal to θ. 
     Exemplarily, as shown in  FIG.  9    and  FIG.  11   , the carrier layer  7  further includes a through-hole H 1  corresponding to the recessed surface S 3 . When the light-emitting element  50  and the carrier layer  7  are cooperatively configured, the electrode connection surface S 2  of the light-emitting element  50  where the first connection electrode  51  and the second connection electrode  52  are provided can be configured corresponding to the received surface S 3 , so that the first connection electrode  51  and the second connection electrode  52  are electrically connected to the backlight driving circuit  4  through the above-mentioned through-hole H 1 . Exemplarily, the light-emitting element  50  can be electrically connected to the second thin film transistor  32  in the backlight driving circuit  4  through the through-hole H 1 . In this way, on the one hand, an angle θ is formed between the light-exiting surface S 1  of the light-emitting element  50  and the plane of the reflective layer  6 , so that the light emitted from the light-emitting element  50  can avoid the light-emitting element  50  after being reflected by the reflective layer  6 ; and on the other hand, it is only necessary to pattern the carrier layer  7  to form the required recessed portion  70  at the surface of the carrier layer  7 , and the process thereof is simple and the cost is low. Exemplarily, the patterning process includes steps of exposure, development, and etching. 
     In some embodiments of the present disclosure, a structure of the light-emitting element  50  can be adjusted.  FIG.  12    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. Exemplarily, as shown in  FIG.  12   , an angle θ may be formed between at least part of the light-exiting surface S 1  of the light-emitting element  50  and the electrode connection surface S 2 . That is, at least part of the light-exiting surface S 1  of the light-emitting element  50  is arranged to be inclined with respect to the electrode connection surface S 2 . In some embodiments of the present disclosure, when the light-emitting element  50  is used in a display device, as shown in  FIG.  12   , the electrode connection surface S 2  of the light-emitting element  50  may be arranged parallel to the plane of the reflective layer  6 . In the embodiments of the present disclosure, the light-exiting surface S 1  of light-emitting element  50  is arranged to be inclined with respect to the electrode connection surface S, so that the light emitted from the light-emitting element  50  can avoid the light-emitting element  50  after being reflected by the reflective layer  6 . 
     It should be noted that when the light-emitting element  50  includes a plurality of light-exiting surfaces located at different planes, in the embodiments of the present disclosure, all the light-exiting surfaces of the light-emitting element  50  may be arranged to be inclined with respect to the electrode connection surface S 2 , or, only part of the light-exiting surfaces may be arranged to be inclined with respect to the electrode connection surface S 2 . As shown in  FIG.  12   , the light-emitting element  50  includes the light-exiting surface S 01  parallel to the electrode connection surface S 2  and the light-exiting surface S 1  inclined with respect to the electrode connection surface S 2 . 
     Exemplarily, the display device includes a plurality of light-emitting elements  50 . In some embodiments of the present disclosure, when arranging a plurality of Mini LEDs  50  in the display device, the light-exiting surface S 1  of one of the light-emitting elements  50  faces another one light-emitting element  50  adjacent to the one light-emitting element  50 . 
     For example, the light-emitting elements  50  in the display device include a first light-emitting element  501  and a second light-emitting element  502  that are arranged adjacently.  FIG.  13    and  FIG.  14    are schematic cross-sectional views of two other display devices according to embodiments of the present disclosure. As shown in  FIG.  13    and  FIG.  14   , the first light-emitting element  501  includes a first light-exiting surface S 11  located at a side of the first light-emitting element  501  adjacent to the second light-emitting element  502 . The second light-emitting element  502  includes a second light-exiting surface S 12  located at a side of the second light-emitting element  502  adjacent to the first light-emitting element  501 . That is, for two adjacent light-emitting elements  50 , when the light-exiting surfaces of the two adjacent light-emitting elements  50  are arranged to be inclined with respect to the reflective layer  6 , the light-exiting surfaces of the two adjacent light-emitting elements  50  can be arranged to face each other, thereby avoiding the formation of a dark area between the two adjacent light-emitting elements  50  and improving the uniformity of the outputted light. 
     Exemplarily, as shown in  FIG.  13    and  FIG.  14   , in some embodiments of the present disclosure, the first light-exiting surface S 11  and the second light-exiting surface S 12  may be symmetrically arranged, therefore, after the light emitted from the first light-emitting element  501  and the second light-emitting element  502  is reflected by the reflective layer  6 , the reflected light has a more uniform distribution between the first light-emitting element  501  and the second light-emitting element  502 . 
     Exemplarily, when arranging the light-emitting elements  50  in the display device, a distance between two adjacent light-emitting elements  50  is P, and along a direction perpendicular to a plane of the display panel, a distance between the light-emitting element  50  and the reflective layer  6  is D. In some embodiments of the present disclosure, it is defined P&gt;2Dtanθ. The distance between two adjacent light-emitting elements  50  refers to a distance between geometric centers of the two adjacent light-emitting elements  50 . With reference to  FIG.  13    and  FIG.  14   , a distance between the first light-emitting element  501  and the second light-emitting element  502  is P. The first light-emitting element  501  and the second light-emitting element  502  may be located in a same horizontal plane, and the distances between the first light-emitting element  501  (and the second light-emitting element  502 ) and the reflective layer  6  is D. In the embodiments of the present disclosure, by defining P&gt;2Dtanθ, the light reflected by the reflective layer  6  can exit from a position between the first light-emitting element  501  and the second light-emitting element  502 , thereby avoiding the first light-emitting element  501  and the second light-emitting element  502  blocking the reflected light. 
     Exemplarily, when arranging the light-emitting elements  50  in the display device, in some embodiment of the present disclosure, at least one of the light-emitting elements  50  has at least two light-exiting surfaces, and the at least two light-exiting surface included by a same light-emitting element  50  intersect each other. 
       FIG.  15    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. Exemplarily, as shown in  FIG.  15   , the display device includes a first light-emitting element  501 , a second light-emitting element  502  and a third light-emitting element  503  that are arranged adjacently, and the second light-emitting element  502  is located between the first light-emitting element  501  and the third light-emitting element  503 . In some embodiments of the present disclosure, at least the second light-emitting element  502  located at a middle position includes at least two light-exiting surfaces, and two light-exiting surfaces of the at least two light-exiting surfaces of the second light-emitting element  502  face the first light-emitting element  501  and the third light-emitting element  503 , respectively. In this way, the uniformity of the light between the first light-emitting element  501  and the second light-emitting element  502  can be improved, and the uniformity of the light between the second light-emitting element  502  and the third light-emitting element  503  can be improved. As shown in  FIG.  15   , the first light-emitting element  501  includes a first light-exiting surface S 11  facing the second light-emitting element. The second light-emitting element  502  includes a second light-exiting surface S 12  facing the first light-emitting element  501  and a third light-exiting surface S 13  facing the third light-emitting element  503 . The third light-emitting element  503  includes a fourth light-exiting surface S 14  located at a side of the third light-emitting element  503  adjacent to the second light-emitting element  502 . 
     It should be noted that the number of light-emitting surfaces of the second light-emitting element  502  can be determined according to the number of light-emitting elements arranged around the second light-emitting element  502 .  FIG.  15    merely exemplarily illustrates a structure of a second light-emitting element  502  in a case where a first light-emitting element  501  and a third light-emitting element  503  are arranged at two sides of the second light-emitting element  502 . When more light-emitting elements are arranged around the second light-emitting element  502 , the second light-emitting element  502  may be configured to include more light-exiting surfaces according to the embodiments of the present disclosure. For example, in some embodiments of the present disclosure, the second light-emitting element  502  can be configured to have any one or more of the following shapes: a truncated circular shape as shown in  FIG.  16   , a conical shape as shown in  FIG.  17   , a pyramid shape as shown in  FIG.  18   , or a pyramid shown in  FIG.  19   .  FIG.  16   ,  FIG.  17   ,  FIG.  18    and  FIG.  19    respectively illustrate schematic perspective views of other four light-emitting elements according to the embodiments of the present disclosure. In some embodiments of the present disclosure, a side surface of the truncated circular shape, the conical shape, the pyramid shape, or the pyramid shown mentioned above may be configured as the light-exiting surface of the second light-emitting element  502 , so that the second light-emitting element  502  can emit light in multiple directions. 
       FIG.  20    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. In some embodiments of the present disclosure, as shown in  FIG.  20   , the second light-emitting element  502  includes at least a first light-emitting sub-element  5021  and a second light-emitting sub-element  5022 . The first light-emitting element  501 , the third light-emitting element  503 , the first light-emitting sub-element  5021  and the second light-emitting sub-element  5022  each have the structure shown in  FIG.  8   . That is, the light-exiting surfaces S 1  of the first light-emitting element  501 , the third light-emitting element  503 , the first light-emitting sub-element  5021  and the second light-emitting sub-element  5022  are all parallel to the respective electrode connection surfaces S 2 . 
       FIG.  21    is a schematic cross-sectional view of another carrier layer according to an embodiment of the present disclosure. With reference to  FIG.  20    and  FIG.  21   , at least one of the recessed portions  70  in the carrier layer  7  includes a first recessed sub-portion  71  and a second recessed sub-portion  72 . The first recessed sub-portion  71  and the second recessed sub-portion  72  are adjacent to each other. When the first light-emitting sub-element  5021  and the second light-emitting sub-element  5022  are arranged in the display device, as shown in  FIG.  20   , the first light-emitting sub-element  5021  and the second light-emitting sub-element  5022  of a same light-emitting element  50  are respectively located in the first recessed sub-portion  71  and the second recessed sub-portion  72 . With such a configuration, the light-exiting direction of the light emitted from the first light-emitting sub-element  5021  is different from the light-exiting-direction of the light emitted from the second light-emitting sub-element  5022 . 
     As shown in  FIG.  21   , the first recessed sub-portion  71  includes a first recessed sub-surface S 31 , and an angle θ is formed between the first recessed sub-surface S 31  and a plane of the reflective layer (not shown in  FIG.  21   ). Moreover, the carrier layer  7  includes a through-hole H 1  corresponding to the first recessed sub-surface S 31 . The second recessed sub-portion  72  includes a second recessed sub-surface S 32 . An angle θ is formed between the second recessed sub-surface S 32  and the plane of the reflective layer (not shown in  FIG.  21   ). The carrier layer  7  includes a through-hole H 1  corresponding to the second recessed sub-surface S 32 . 
     When the first light-emitting sub-element  5021  and the second light-emitting sub-element  5022  are configured cooperatively with the carrier layer  7 , the electrode connection surfaces of the first connection electrode  51  and the second connection electrode  52  of the first light-emitting sub-element  5021  can be arranged corresponding to the first recessed sub-surface S 31 , and the electrode connection surfaces of the first connection electrode  51  and the second connection electrode  52  of the second light-emitting sub-element  5022  can be arranged corresponding to the second recessed sub-surface S 32 , so that the first connection electrode  51  and the second connection electrode  52  can be electrically connected to the backlight driving circuit  4  through the respective through-hole H 1  described above. 
     Exemplarily, in some embodiments of the present disclosure, when the display device works, the different first light-emitting sub-element  5021  and second light-emitting sub-element  5022  in the second light-emitting element  502  receive a same driving signal. In an embodiment of the present disclosure, the first connection electrodes  51  of the first light-emitting sub-element  5021  is electrically connected to the first connection electrodes  51  of the second light-emitting sub-element  5022 , and the second connection electrode  52  of the first light-emitting sub-element  5021  is electrically connected to the second connection electrode  52  of the second light-emitting sub-element  5022 . 
     Exemplarily, as shown in  FIG.  21   , the first recessed sub-portion  71  and the second recessed sub-portion  72  may be symmetrically arranged. 
     In some embodiments of the present disclosure, the light-exiting surface of the light-emitting element  50  may include an arc surface, so that the light emitted from the light-emitting element  50  can be uniformly propagated in multiple directions. 
       FIG.  22    is a schematic cross-sectional view of another light-emitting element according to an embodiment of the present disclosure. Exemplarily, as shown in  FIG.  22   , the display device further includes a light cover  8  located at a light-exiting side of the light-emitting element  50 . Exemplarily, a surface of the light cover  8  away from the light-emitting element  50  includes a curved surface. For example, the light cover  8  may be shaped as at least one part of a spherical surface. With such a configuration, a propagation direction of the light emitted from the light-emitting element  50  can be changed, so that the light emitted from different positions of the light-emitting element  50  has a more uniform intensity. 
       FIG.  23    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. Exemplarily, as shown in  FIG.  23   , the display device further includes a first diffusion layer  81  located between the light-emitting element  50  and the base  10 . The first diffusion layer  81  can adjust the propagation direction of the light emitted from the light-emitting element  50 , so that the light that passes through the first diffusion layer  81  can propagate uniformly in multiple directions. Therefore, the backlight directed to the display panel  1000  is more uniform, thereby achieving a uniform light. As shown in  FIG.  23   , the first diffusion layer  81  includes a through-hole H 11 , and the light-emitting element  50  is electrically connected to the backlight driving circuit  4  through the through-hole H 11 . 
       FIG.  24    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. In some embodiments of the present disclosure, as shown in  FIG.  24   , the display device further includes a second diffusion layer  82  located between the light-emitting element  50  and the reflective layer  6 . The light emitted from the light-emitting element  50  can be scattered or refracted by the second diffusion layer  82  when being directed to the reflective layer  6 , so that the light intensity consistency of the light propagating in different directions can be improved, thereby achieving uniform light. After the light is reflected by the reflective layer  6 , the reflected light can be scattered or refracted again by the second diffusion layer  82  when being directed to the display panel  1000 , thereby further improving the uniformity of the backlight directed to the display panel  1000 . 
     Exemplarily, the first diffusion layer  81  or the second diffusion layer  82  includes diffusion particles and/or microstructures.  FIG.  24    is a schematic diagram illustrating a case where microstructures are arranged at both the surface of and the interior of the second diffusion layer  82 . Alternatively, diffusion particles can be arranged at a side of the first diffusion layer  81  or the second diffusion layer  82 , microstructures including chamfered pyramids can be arranged at another side of the first diffusion layer  81  or the second diffusion layer  82 . The present disclosure is not limited thereto. Alternatively, the first diffusion layer  81  or the second diffusion layer  82  may be formed by spraying or coating. 
       FIG.  25    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. In some embodiments of the present disclosure, as shown in  FIG.  25   , the display device further includes a first polarizer  91  and a second polarizer  92 . The first polarizer  91  is located at a side of the liquid crystal layer  300  away from the base  10 . The second polarizer  92  is located between the light-emitting element  50  and the liquid crystal layer  300 . The polarization directions of the first polarizer  91  and the second polarizer  92  are perpendicular to each other. Exemplarily, at least one of the first polarizer  91  and the second polarizer  92  may be formed by adsorbing a dichroic dye by a stretched polymer film, and the polymer may be polyvinyl alcohol (PVA) and the dichroic dye may be iodine, organic dyes, etc., but not limited thereto. Alternatively, at least one of the first polarizer  91  and the second polarizer  92  may include a metal wire grid polarizer. Exemplarily, the metal wire grid polarizer includes a nanowire grid polarizer. The material of the metal wire grid polarizer includes one or more of aluminum, chromium, gold, and nickel. 
     Exemplarily, as shown in  FIG.  25   , in some embodiments of the present disclosure, the second polarizer  92  includes a first metal wire grid polarizer  921 , and the first metal wire grid polarizer  921  is located between the light-emitting element  50  and the base  10 . Exemplarily, the first metal wire grid polarizer  921  is located between the light-emitting element  50  and the backlight driving circuit  4 . As shown in  FIG.  25   , the first metal wire grid polarizer  921  includes a through-hole H 12 , and the light-emitting element  50  is electrically connected to the backlight driving circuit  4  through the through-hole H 12 . The first metal wire grid polarizer  921  has strong durability and reliability in high temperature or high humidity environments. In the embodiments of the present disclosure, the second polarizer  92  includes the first metal wire grid polarizer  921 , and when forming the backlight driving circuit  4  and the light-emitting element  50 , the first metal wire grid polarizer  921  can be guaranteed not to be damaged, and the display effect of the display device can be guaranteed. 
       FIG.  26    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. As shown in  FIG.  26   , in some embodiments of the present disclosure, the second polarizer  92  includes a second metal wire grid polarizer  922  that is located between the base  10  and the display driving circuit  2 . The second metal wire grid polarizer  922  has strong durability and reliability in high temperature or high humidity environments. In the embodiments of the present disclosure, the second polarizer  92  includes the second metal wire grid polarizer  922 . When forming the display driving circuit  2 , the backlight driving circuit  4  and the light-emitting element  50 , the second metal wire grid polarizer  922  can be guaranteed not to be damaged, and the display effect of the display device can be guaranteed. Moreover, in the embodiments of the present disclosure, the second metal wire grid polarizer  922  is located between the base  10  and the display driving circuit  2 , thereby increasing a distance between the second metal wire grid polarizer  922  and the light-emitting element  50 , which is beneficial to improving the uniformity of light received at different positions at the second metal wire grid polarizer  922 . 
     Exemplarily, when the first metal wire grid polarizer  921  and/or the above-mentioned first diffusion layer  81  described above are arranged between the light-emitting element  50  and the base  10 , in some embodiments of the present disclosure, the first wire grid polarizer  921  and/or the first diffusion layer  81  can be reused as the carrier layer  7  described above. With reference to  FIG.  9   , the first diffusion layer  81  is located between the light-emitting element  50  and the base  10 , and the first diffusion layer  81  is used as the carrier layer  7 . As shown in  FIG.  9   , the first diffusion layer  81  includes the recessed portion  70  for receiving the light-emitting element  50 , and the through-hole H 1  for connecting the light-emitting element  50  and the backlight driving circuit  4 . 
       FIG.  27    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. Exemplarily, as shown in  FIG.  27   , the first metal wire grid polarizer  921  and the first diffusion layer  81  are provided between the light-emitting element  50  and the base  10 . As shown in  FIG.  27   , the first diffusion layer  81  is located between the light-emitting element  50  and the first metal wire grid polarizer  921 . In this case, the light emitted from the light-emitting element  50  can be polarized by the first metal wire grid polarizer  921  after being diffused by the first diffusion layer  81 , which is beneficial to improving the uniformity of the light received by the first metal wire grid polarizer  921 . 
     Exemplarily, as shown in  FIG.  25   ,  FIG.  26    and  FIG.  27   , the display device further includes a flat separation layer  900 . The flat separation layer  900  is in contact with the first polarizer  91  and/or the second polarizer  92 . When the first polarizer  91  or the second polarizer  92  includes the metal wire grid polarizer, the flat separation layer  900  can provide a flat surface for the first polarizer  91  or the second polarizer  92 , and can also make the first polarizer  91  or the second polarizer  92  be spaced from a film layer adjacent to it. 
       FIG.  28    is a schematic cross-sectional view of another display device according to an embodiment of the present disclosure. Exemplarily, as shown in  FIG.  28   , a color conversion layer  9  is further provided between the light-emitting element  50  and the reflective layer  6 . The color conversion layer  9  is configured to generate light having a preset color under the excitation of the light emitted from the light-emitting element  50 . Exemplarily, the color conversion layer  9  includes a fluorescent film layer and/or a quantum dot film layer. 
     The color conversion layer is configured to perform color conversion on the light emitted from the light-emitting element, and perform light mixing, such that the backlight source finally outputs white light. Exemplarily, in some embodiments of the present disclosure, the light-emitting element  50  may be a blue light-emitting element that emits blue light, and the color conversion layer  9  may include a yellow fluorescent material. The blue light emitted from the blue light-emitting element excites the yellow phosphor to emit yellow light, and the yellow light is mixed with the blue light emitted from the blue light-emitting element to form white light. In other embodiments of the present disclosure, the color of the light emitted from the light-emitting element  50  and the color of the fluorescent material in the color conversion layer can also be other colors, and the backlight source finally outputs composite light such as white light. Or, in some embodiments of the present disclosure, monochromatic light such as red light, green light or blue light can be outputted from the light-emitting element  50  after passing through the color conversion layer  9 . The present disclosure is not limited to the above-described examples. 
     An embodiment of the present disclosure provides a method for forming a display panel. As shown in  FIG.  1   , the display panel includes an array substrate  100 . With reference to  FIG.  29   , which is a schematic flowchart of a method for manufacturing an array substrate according to the embodiments of the present disclosure, and the method for manufacturing an array substrate  100  includes the following steps. 
     At step S 1 , a base  10  is provided, and the base  10  has a first side and a second side oppositely arranged along a thickness direction of the substrate  10 . 
     At step S 2 , a display driving circuit  2  is formed at the first side and a backlight driving circuit  4  is formed at the second side, and thus an array substrate  100  including the backlight driving circuit  4 , the display driving circuit  2  and the base  10  is obtained. The display driving circuit  2  includes a first thin film transistor  31 . The backlight driving circuit  4  is configured to drive the backlight source to emit light. The backlight driving circuit  4  includes a second thin film transistor  32 . Each of the first thin film transistor  31  and the second thin film transistor  32  includes a gate electrode  310 , a source electrode  311 , a drain electrode  312  and a semiconductor layer  313 . Exemplarily, the display driving circuit  2  further includes a pixel electrode  21 , and the first thin film transistor  31  is electrically connected to the pixel electrode  21 . 
     It should be noted that, the embodiments of the present disclosure do not limit an order for forming the display driving circuit  2  and the backlight driving circuit  4 . For example, the display driving circuit  2  may be formed first, and then the backlight driving circuit  4  may be formed. Alternatively, the backlight driving circuit  4  may be formed first, and then the display driving circuit  2  may be formed. Alternatively, the display driving circuit  2  and the backlight driving circuit  4  may be formed at the same time. 
     In the method for manufacturing the display panel according to the embodiments of the present disclosure, the display driving circuit  2  and the backlight driving circuit  4  are provided at the first side and the second side of the base  10 , respectively, and there is no need provide different carrier substrates for forming the display driving circuit  2  and the backlight driving circuit  4 , which is beneficial to reducing the thickness of the prepared display panel  1000  and reducing the weight of the prepared display panel  1000 . 
     An embodiment of the present disclosure further provides a method for manufacturing a display device.  FIG.  30    is a schematic flowchart of a method for forming a display device according to an embodiment of the present disclosure, and  FIG.  31    is a schematic structural flow diagram corresponding to  FIG.  30   . As shown in  FIG.  30    and  FIG.  31   , the method includes the following steps. 
     At step S 3 , an array substrate  100  and a color filter substrate  200  are provided. The array substrate  100  is obtained by the above-mentioned method. The color filter substrate  200  includes color resists corresponding to different colors. 
     At step S 4 , the color filter substrate  200  and the array substrate  100  are cell-assembled to obtain a display motherboard 1. Exemplarily, the display motherboard 1 includes a plurality of cutting lines.  FIG.  31    shows different cutting lines C1, C2 and C3, respectively. 
     At step S 5 , the display motherboard 1 is cut along the cutting lines C1, C2 and C3 to obtain a display panel  1000  having a smaller size. 
     At step S 6 , a backlight source is formed at a side of the backlight driving circuit  4  in the display panel  1000  away from the base 1 to obtain the display device, and the backlight source includes a light-emitting element  5  electrically connected to a second thin film transistor or the wiring in the backlight driving circuit  4 . Exemplarily, the light-emitting element  50  can be bonded, by means of eutectic soldering or reflow soldering, to the side of the base  10  where the backlight driving circuit  4  is located. 
     In the method for manufacturing the display device according to the embodiments of the present disclosure, the display driving circuit  2  and the backlight driving circuit  4  are provided at the first side and the second side of the base  10  of the display panel  1000 , respectively, and there is no need to provide different carriers for the display driving circuit  2  and the backlight driving circuit  4  respectively. In this way, it is beneficial to reducing the thickness of the display device, reducing the weight of the display device, and reducing the cost of the display device. Moreover, with such a configuration, after the display driving circuit  2  and the backlight driving circuit  4  are formed, the alignment and attachment operation can be omitted, which is beneficial to simplify the process for forming the display device. 
     In addition, in the embodiments of the present disclosure, the light-emitting element  50  is formed after the cell-assembling process of the display panel  1000 . In this way, on the one hand, a size of the display panel  1000  can be reduced to reduce the light-emitting elements  50  that need to be transferred, thereby improving the process efficiency and yield of the transfer assembly of the light-emitting elements  50 ; and on the other hand, it can avoid the contamination of the materials in the cell during the formation of the light-emitting element  50 . 
     Exemplarily, as shown in  FIG.  25   , the display panel  1000  includes a liquid crystal layer  300  located between the display driving circuit  2  and the color filter substrate  200 . After the light-emitting element  50  is formed at a side of the backlight driving circuit  4  away from the base 1 in the step S 6  described above, the method for forming the display device according to an embodiment of the present disclosure further includes: forming a first polarizer  91  at a side of the liquid crystal layer  300  away from the base  10 . Exemplarily, the first polarizer  91  may be formed by adsorbing dichroic dyes by a stretched polymer film, and the polymer may be polyvinyl alcohol (PVA), and the dichroic dyes may be iodine, organic dyes, etc., but not limited thereto. Alternatively, the first polarizer  91  may also include a metal wire grid polarizer. In the embodiments of the present disclosure, the first polarizer  91  is formed after the formation of the light-emitting element  50 , so that it can avoid that the formation process of the light-emitting element  50  has an influence on the formation of the first polarizer  91  to damage to the performance of the first polarizer  91 . 
     In some embodiments of the present disclosure, the formation of the liquid crystal layer  300  may be performed before the cell-assembling of the color filter substrate  200  and the array substrate  100 . For example, the liquid crystal layer  300  is formed by one drop filling (ODF, liquid crystal dropping) method. A side of the array substrate  100  and the color filter substrate  200  is coated with sealant, and liquid crystals is dropped at another side of the array substrate  100  and the color filter substrate  200 . Then, the array substrate  100  and the color filter substrate  200  are attached to each other, to seal the liquid crystal layer  300  therebetween. Alternatively, after the array substrate  100  and the color filter substrate  200  are attached to each other, the space defined by the array substrate  100  and the color filter substrate  200  is filled with the liquid crystal layer  300  through an opening reserved in advance. The present disclosure is not limited by the above examples. 
     Exemplarily, as shown in  FIG.  25   , the method for manufacturing the display device further includes: forming a second polarizer  92  between the light-emitting element  50  and the liquid crystal layer  300 . 
     Exemplarily, the second polarizer  92  includes a metal wire grid polarizer. With reference to  FIG.  25   , the metal wire grid polarizer includes a first metal wire grid polarizer  921  located between the base  10  and the light-emitting element  50 . 
     Exemplarily, as shown in  FIG.  25   , the above-mentioned method for forming the first metal wire grid polarizer  921  includes: after forming the backlight driving circuit  4  at the second side of the base  10  and before forming the light-emitting element  50  at the side of the backlight driving circuit  4  away from the base  10 , forming a first metal wire grid polarizer  921  at the second side. 
     In some embodiments of the present disclosure, as shown in  FIG.  26   , the metal wire grid polarizer of the second polarizer  92  includes a second metal wire grid polarizer  922  located between the base  10  and the liquid crystal layer  300 . In some embodiments of the present disclosure, the above-mentioned method for forming the metal wire grid polarizer includes: before forming the display driving circuit  2  at the first side of the base  10 , forming the second metal wire grid polarizer  922  at the first side of the base  10 . 
     Exemplarily, the formation of the first metal wire grid polarizer  921  or the second metal wire grid polarizer  922  can be performed by any one of yellow light, spray coating, and embossing. 
       FIG.  32    is a schematic flowchart of a method for manufacturing a display device according to another embodiment of the present disclosure. Exemplarily, as shown in  FIG.  9    and  FIG.  32   , before the above-mentioned step S 6  of forming the light-emitting element  50  at the side of the backlight driving circuit  4  away from the base  10 , the method further includes the following steps. 
     At step S 51 , a carrier layer  7  is formed at the side of the backlight driving circuit  4  away from the base  10 . Exemplarily, the carrier layer  7  may include one or more films. For example, the first diffusion layer  81  and/or the second polarizer  92  described above can be reused as the carrier layer  7 . 
     At step S 5 , a through-hole H 1  passing through the carrier layer  7  is formed. Exemplarily, the through-hole H 1  may be formed by patterning processes such as exposure, development, and etching. 
     After the through-hole H 1  is formed, the light-emitting element  50  is formed at a side of the carrier layer  7  away from the base  10 , and the light-emitting element  50  is electrically connected to the backlight driving circuit  4  through the through-hole H 1 . 
     In some embodiments of the present disclosure, as shown in  FIG.  9    and  FIG.  10   , after the above-mentioned step S 51 , a recessed portion  70  may be formed in the carrier layer  7 , and an angle θ may be formed between a recessed surface S 3  of the recessed portion  70  and a plane of the carrier layer  7 . Subsequently, at least part of the light-emitting element  50  can be disposed in the recessed portion  70 , so that an angle θ can be formed between the light-exiting surface of the light-emitting element  50  and the plane of the reflective layer. 
     As shown in  FIG.  10   , the recessed surface S 3  and the through-hole H 1  correspond to each other. When configuring the light-emitting element  50 , an electrode connection surface S 2  of the light-emitting element  50  can be arranged corresponding to the recessed surface S 3 , so that the connection electrode of the light-emitting element  50  is electrically connected to the backlight driving circuit  4  through the through-hole H 1 . 
     The above-described embodiments are merely preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions and improvements made within the principle of the present disclosure shall fall into the protection scope of the present disclosure.