Patent Publication Number: US-2021183952-A1

Title: Display substrate, light field display apparatus and method for driving the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation application of U.S. Ser. No. 16/512,924 filed on Jul. 16, 2019 which claims priority to the Chinese Patent Application No. 201811251738.X, filed on Oct. 25, 2018, which is incorporated herein by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     The present application relates to the field of display technologies, and more particularly, to a display substrate, a light field display apparatus, and a method for driving the same. 
     BACKGROUND 
     Light field display has become a research hotspot in recent years. In order to obtain a better display effect, a display needs to provide a lot of light beams. In a conventional display, each sub-pixel unit corresponds to one light emitting point, which may provide a light beam to a space. A number of light beams in the space is the same as that of sub-pixel units of the display. 
     In the related art, due to a capability limitation corresponding to a process, sizes of the sub-pixel units may not be reduced indefinitely. By taking an Organic Light Emitting Diode (OLED) product as an example, in order to achieve a better display effect, a driving circuit usually comprises a plurality of thin film transistors, capacitors, and signal lines, which may result in large sizes of pixels. Thereby, a density of the pixels may not be improved, which makes it impossible to achieve a better light field display effect. 
     SUMMARY 
     The present application provides a display substrate, a light field display apparatus and a method for driving the same. 
     According to a first aspect of the present disclosure, there is provided a display substrate, comprising: 
     a base substrate; 
     a light emitting block on the base substrate, wherein the light emitting block comprises a plurality of first light emitting units, and each of the first light emitting units comprises a plurality of first light emitting points, which are located at a plurality of predetermined positions in the first light emitting unit, respectively; and 
     a first driving lead electrically connected to first light emitting points located at a same predetermined position in respective first light emitting units and configured to receive a first driving signal from a driving circuit. 
     In some embodiments, the light emitting block further comprises: 
     a plurality of second light emitting units, wherein each of the second light emitting units comprises a plurality of second light emitting points, which are located at a plurality of predetermined positions in the second light emitting unit, respectively; and 
     a second driving lead electrically connected to second light emitting points located at a same predetermined position in respective second light emitting units and configured to receive a second driving signal from the driving circuit. 
     In some embodiments, the first light emitting units are left-eye light emitting units, and the second light emitting units are right-eye light emitting units; and 
     the first light emitting points are left-eye light emitting points, and the second light emitting points are right-eye light emitting points. 
     In some embodiments, the plurality of first light emitting units and the plurality of second light emitting units are alternately arranged in a set direction. 
     In some embodiments, the first driving leads and the second driving leads are arranged in a first direction. 
     In some embodiments, the display substrate further comprises: 
     a plurality of first branch leads and a plurality of second branch leads, wherein the first branch leads and the second branch leads are arranged in a second direction intersecting the first direction respectively, 
     wherein the first driving lead is electrically connected to the first light emitting points located at the same predetermined position in the respective first light emitting units through the plurality of first branch leads, respectively, and the second driving lead is electrically connected to the second light emitting points located at the same predetermined position in the respective second light emitting units through the plurality of second branch leads, respectively. 
     In some embodiments, the set direction is a horizontal direction, the first direction is a vertical direction, and the second direction is a horizontal direction. 
     In some embodiments, the light emitting block is a single light emitting block or a plurality of light emitting blocks arranged in a matrix form, 
     the plurality of first light emitting units in the light emitting block are arranged in a matrix form, and the plurality of second light emitting units in the light emitting block are arranged in a matrix form, and 
     the plurality of first light emitting points in each first light emitting unit are arranged in a matrix form, and the plurality of second light emitting points in each second light emitting unit are arranged in a matrix form. 
     In some embodiments, the display substrate is a self-luminous type top emission display substrate. 
     According to a second aspect of the present disclosure, there is provided a light field display apparatus, comprising: 
     the display substrate according to the first aspect, and 
     a light angle adjustment structure located on a light emitting side of the display substrate and configured to deflect light emitted from the first light emitting points electrically connected to a same first driving lead to different directions. 
     In some embodiments, the light angle adjustment structure is further configured to deflect light emitted from second light emitting points electrically connected to the same second driving lead to different directions. 
     In some embodiments, the light angle adjustment structure comprises micro-lenses disposed in correspondence to the light emitting block. 
     According to a third aspect of the present disclosure, there is provided a method for driving the light field display apparatus according to the second aspect, comprising: 
     receiving a first driving signal from a driving circuit through the first driving lead; and 
     deflecting, by the light angle adjustment structure, light emitted from the first light emitting points electrically connected to a same first driving lead to different directions. 
     In some embodiments, the method further comprises: 
     receiving a second driving signal from the driving circuit through the second driving lead; and 
     deflecting, by the light angle adjustment structure, light emitted from the second light emitting points electrically connected to a same second driving lead to different directions. 
     In some embodiments, for 2D display, the first driving signal is the same as the second driving signal, and for 3D display, the first driving signal is a left-eye driving signal, and the second driving signal is a right-eye driving signal. 
     Additional aspects and advantages of the present application will be set forth in part in the following description, will become apparent from the following description, or may be understood through the practice of the present application. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a schematic structural diagram of a display substrate according to an embodiment of the present application; 
         FIG. 2  is a schematic structural diagram of a specific wiring of first light emitting units in a light emitting block according to an embodiment of the present application; 
         FIG. 3  is a schematic structural diagram of a specific wiring of first light emitting units and second light emitting units in a light emitting block according to an embodiment of the present application; 
         FIG. 4  is a schematic structural diagram of another specific wiring of first light emitting units and second light emitting units in a light emitting block according to an embodiment of the present application; 
         FIG. 5  is a schematic structural diagram of another display substrate according to an embodiment of the present application; 
         FIG. 6  is a schematic structural diagram of a light field display apparatus according to an embodiment of the present application; 
         FIG. 7  is a flowchart of a method for driving a light field display apparatus according to an embodiment of the present application; and 
         FIG. 8  is a flowchart of another method for driving a light field display apparatus according to an embodiment of the present application. 
     
    
    
     DETAILED DESCRIPTION 
     The embodiments of the present application will be described in detail below, and examples of the embodiments are illustrated in the accompanying drawings, wherein the same or similar reference signs are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative, are merely used to explain the present application, and are not to be construed as limiting the present application. 
     It may be understood by those skilled in the art that singular forms “a”, “an”, “the” used here may also comprise plural forms, unless otherwise stated. It should also be understood that phrase “comprise” used in the specification of the present disclosure refers to presence of the features, integers, steps, operations, elements and/or components, but should not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It should be understood that when an element is referred to as being “connected” to another element, it may be directly connected to the other element, or there may be an intermediate element therebetween. Further, “connected” as used here may comprise either a wireless connection. The phrase “and/or” used here comprises all or any of one or more of associated listed items, or all combinations thereof. 
     The technical solutions according to the present application will be described in detail below using specific embodiments. In the following specific embodiments, the same or similar concepts or processes may not be described in detail in some embodiments. 
     Shapes and sizes of components in the accompanying drawings do not reflect actual conditions of the components, but are merely illustrative of the embodiments of the present application. 
     As shown in  FIG. 1  and  FIG. 2 ,  FIG. 1  is a schematic structural diagram of a display substrate according to an embodiment of the present application, and  FIG. 2  is a schematic structural diagram of a specific wiring of light emitting units included in a light emitting block. The display substrate comprises a base substrate  10 , at least one light emitting block  21  on the base substrate  10 , and a plurality of first driving leads  22 . 
     Each of the light emitting blocks  21  comprises a plurality of first light emitting units  211  (for example, four first light emitting units  211  as shown), and each of the first light emitting units  211  comprises a plurality of first light emitting points  2111  (for example, four first light emitting points  2111  as shown) located at a plurality of predetermined positions in the first light emitting unit  211  respectively. 
     In  FIG. 1  and  FIG. 2 , as an example, the light emitting blocks  21  are arranged in a matrix form, the plurality of first light emitting units  211  in each of the light emitting blocks  21  are arranged in a matrix form, the plurality of first light emitting points  2111  in each of the first light emitting units  211  are arranged in a matrix form. In this case, the predetermined positions may be determined by rows and columns in the matrix. 
     Each of the first driving leads  22  is electrically connected to first light emitting points  2111  at the same predetermined positions in the respective first light emitting units  211  and is configured to receive a first driving signal from a driving circuit. 
     Specifically, in the embodiment of the present application, first light emitting points located at the same positions in different light emitting blocks are connected to different first driving leads. In a specific implementation, a light emitting unit composed of first light emitting points connected to the same first driving lead  22  corresponds to one sub-pixel unit on the display substrate, and colors of light emitted from the first light emitting points may comprise red, green, and blue, or, of course, other colors such as yellow. 
     The display substrate according to the embodiment of the present application comprises: a base substrate; a light emitting block on the base substrate, wherein the light emitting block comprises a plurality of first light emitting units, and each of the first light emitting units comprises a plurality of first light emitting points located at a plurality of predetermined positions in the first light emitting unit respectively; and first driving leads electrically connected to first light emitting points located at the same predetermined positions in the respective first light emitting units and configured to receive a first driving signal from a driving circuit. Therefore, in the embodiment of the present application, any of the first driving leads may drive a plurality of first light emitting points to emit light at the same time. Compared with the related art, in the embodiment of the present application, a number of light emitting points is significantly improved, and a number of light beams in the space which may be provided is significantly improved, so that a better light field display effect may be achieved. 
     Specifically, as shown in  FIG. 2 , two light emitting blocks  21  are shown in  FIG. 2 , each of the light emitting blocks  21  comprises four first light emitting units  211 , and each of the first light emitting units  211  comprises four first light emitting points  2111 . In a first one of the light emitting blocks  21 , a first light emitting point  2111  located at an upper left corner of each of the first light emitting units  211  is connected to a 1 st  first driving lead  22  from top to bottom; a first light emitting point  2111  located at an upper right corner of each of the first light emitting units  211  is connected to a 3 rd  first driving lead  22  from top to bottom; a first light emitting point  2111  located at a lower left corner of each of the first light emitting units  211  is connected to a 5 th  first driving lead  22  from top to bottom; and a first light emitting point  2111  located at a lower right corner of each of the first light emitting units  211  is connected to a 7 th  first driving lead  22  from top to bottom. 
     As shown in  FIG. 2 , in a second one of the light emitting blocks  21 , a first light emitting point  2111  located at an upper left corner of each of the first light emitting units  211  is connected to a 2 nd  first driving lead  22 ; a first light emitting point  2111  located at an upper right corner of each of the first light emitting units  211  is connected to a 4 th  first driving lead  22 ; a first light emitting point  2111  located at a lower left corner of each of the first light emitting units  211  is connected to a 6 th  first driving lead  22 ; and a first light emitting point  2111  at a lower right corner of each of the first light emitting units  211  is connected to an 8 th  first driving lead  22 . 
     Specifically, in the embodiment of the present application, the display substrate is a self-luminous type top emission display substrate. In a specific implementation, the display substrate may be a top emission OLED display substrate, or may be a Quantum dot Light Emitting Diode (Q-LED) display substrate, or may also be a top emission LED display substrate. A driving circuit of the self-luminous type top emission display substrate is disposed on a side of the light emitting points away from a light emitting side, so that the arrangement of the driving leads may not affect a light emitting efficiency of the display substrate, and a resolution of the display substrate may be improved. 
     Further, in the embodiment of the present application, in order to realize 3D display by the display substrate, as shown in  FIG. 3 , each of the light emitting blocks  21  further comprises a plurality of second light emitting units  212 , and each of the second light emitting units  212  comprises a plurality of second light emitting points  2121  located at a plurality of predetermined positions in the light emitting unit  212  respectively. 
     Similarly, as an example, the plurality of second light emitting units  212  in each of the light emitting blocks  21  are arranged in a matrix form and the plurality of second light emitting points  2121  in each of the second light emitting units  212  are arranged in a matrix form. 
     Specifically, for 3D display, the first light emitting units  211  are left-eye light emitting units, and the second light emitting units  212  are right-eye light emitting units; and the first light emitting points  2111  are left-eye light emitting points, and the second light emitting points  2121  are right-eye light emitting points. 
     In some embodiments, as shown in  FIG. 3 , the display substrate according to the embodiment of the present application further comprises a plurality of second driving leads  23 , wherein each of the second driving leads  23  is electrically connected to second light emitting points  2121  located at the same predetermined positions in the respective second light emitting units  212 , and is configured to receive a second drive signal from the driving circuit. 
     Specifically, as shown in  FIG. 3 , two light emitting blocks  21  are shown in  FIG. 3 , and each of the light emitting blocks  21  comprises two first light emitting units  211  and two second light emitting units  212 , each of the first light emitting units  211  comprises four first light emitting points  2111 , and each of the second light emitting units  212  comprises four second light emitting points  2121 . 
     As shown in  FIG. 3 , in a first one of the light emitting blocks  21 , a first light emitting point  2111  located at an upper left corner of each of the first light emitting units  211  is connected to a 1 st  first driving lead  22  from top to bottom; a first light emitting point  2111  located at an upper right corner of each of the first light emitting units  211  is connected to a 2 nd  first driving lead  22  from top to bottom; a first light emitting point  2111  located at a lower left corner of each of the first light emitting units  211  is connected to a 5 th  first driving lead  22  from top to bottom; and a first light emitting point  2111  located at a lower right corner of each of the first light emitting units  211  is connected to a 6 th  first driving lead  22  from top to bottom; and in a second one of the light emitting blocks  21 , a light emitting point  2111  located at an upper left corner of each of the first light emitting units  211  is connected to a 3 rd  first driving lead  22  from top to bottom; a first light emitting point  2111  located at an upper right corner of each of the first light emitting units  211  is connected to a 4 th  first driving lead  22  from top to bottom; a first light emitting point  2111  located at a lower left corner of each of the first light emitting units  211  is connected to a 7 th  first driving lead  22  from top to bottom; and a first light emitting point  2111  located at a lower right corner of each of the first light emitting units  211  is connected to an 8 th  first driving lead  22  from top to bottom. 
     As shown in  FIG. 3 , in the first light emitting block  21 , a second light emitting point  2121  located at the upper left corner of each of the second light emitting units  212  is connected to a 1 st  second driving lead  23  from top to bottom; a second light emitting point  2121  located at the upper right corner of each of the second light emitting units  212  is connected to a 2 nd  second driving lead  23  from top to bottom; a second light emitting point  2121  located at the lower left corner of each of the second light emitting units  212  is connected to a 5 th  second driving lead  23  from top to bottom; and a second light emitting point  2121  located at the lower right corner of each of the second light emitting units  212  is connected to a 6 th  second driving lead  23  from top to bottom; and in the second light emitting block  21 , a second light emitting point  2121  located at the upper left corner of each of the second light emitting units  212  is connected to a 3 rd  second driving lead  23  from top to bottom; a second light emitting point  2121  located at the upper right corner of each of the second light emitting units  212  is connected to a 4 th  second driving lead  23  from top to bottom; a second light emitting point  2121  located at the lower left corner of each of the second light emitting units  212  is connected to a 7 th  second driving lead  23  from top to bottom; and a second light emitting point  2121  located at the lower right corner of each of the second light emitting units  212  is connected to an 8 th  second driving lead  23  from top to bottom. 
     In a specific implementation, in the embodiment of the present application, a number of the first light emitting units  211  is equal to that of the second light emitting units  212 , and a specific number of the first light emitting points  2111  included in each of the first light emitting units  211  and a specific number of the second light emitting points  2121  included in each of the second light emitting units  2121  are set according to practical production process conditions, and in a case where the process allows, the first light emitting points  2111  and the second light emitting points  2121  are set as many as possible. 
     In some embodiments, as shown in  FIG. 3 , the display substrate according to the embodiment of the present application further comprises a plurality of first branch leads  24  and a plurality of second branch leads  25 , wherein each of the first light emitting points  2111  is connected to a corresponding one of the first driving leads  22  through a corresponding one of the first branch leads  24 , that is, each of the first branch leads  24  is connected to a corresponding one of the first light emitting points  2111 ; and each of the second light emitting points  2121  is connected to a corresponding one of the second driving leads  23  through a corresponding one of the second branch leads  25 , that is, each of the second branch leads  25  is connected to a corresponding one of the second light emitting points  2121 . 
     In some other embodiments, as shown in  FIG. 4 , the display substrate according to the embodiment of the present application further comprises a plurality of first branch leads  24  and a plurality of second branch leads  25 , wherein each of the first branch leads  24  is connected to all the first light emitting points  2111  which are connected to the same first driving lead  22  in an extending direction of the first branch lead  24 , and each of the second branch leads  25  is connected to all the second light emitting points  2121  which are connected to the same second driving lead  23  in an extending direction of the second branch lead  25 . With this arrangement, the same column of first light emitting units are enabled to correspond to the same picture during display and the same column of second light emitting units are enabled to correspond to the same picture during display using a small number of branch leads. In this way, when a person raises or lowers his/her head without movement, a viewing angle at which an object or a picture is viewed does not change, which may correspond to a case where a viewing angle at which an object or a picture is viewed does not change. 
     In a specific implementation, in the embodiment of the present application, the first driving leads and the second driving leads extend in a horizontal direction, and the first branch leads and the second branch leads extend in a vertical direction. Of course, in practical design, the first driving leads, the second driving leads, the first branch leads, and the second branch leads may also not be configured as straight lines but may be configured as curved lines or broken lines. 
     In some embodiments, as shown in  FIGS. 3 and 4 , the first driving leads  22  and the second driving leads  23  are arranged in a first direction (in the vertical direction as shown), the first branch leads  24  and the second branch leads  25  are arranged in a second direction (in the horizontal direction as shown), and in each of the light emitting blocks  21 , when a number of the first light emitting points  2111  included in each of the first light emitting unit  211  is m times n, and a number of the second light emitting points  2121  included in each of the second light emitting units  212  is m times n, a number of first driving leads  22  corresponding to the light emitting block is m times n, and a number of second driving leads  23  corresponding to the light emitting block is m times n, where m and n are both positive numbers greater than 1. In  FIGS. 3 and 4 , an example in which m is equal to 2 and n is equal to 2 is illustrated for description. In this case, the number of the first driving leads  22  and the number of the second driving leads corresponding to each of the light emitting blocks are both illustrated as four. In  FIGS. 3 and 4 , there are illustrated two light emitting blocks, and thus there are illustrated eight first driving leads  22  and eight second driving leads  23 . 
     In some embodiments, as shown in  FIG. 5 , in a set direction, left-eye light emitting units and right-eye light emitting units are alternately arranged, wherein the set direction refers to a direction which is set for the entire display substrate, and is specifically the horizontal direction. That is, in the entire display substrate, the left-eye light emitting units and the right-eye light emitting units are alternately arranged in the horizontal direction. The left-eye light emitting units are used for displaying an image for a left eye, and the right-eye light emitting units are used for displaying an image for a right eye. 
     In some embodiments, as shown in  FIG. 5 , in the embodiment of the present application, when the number of the light emitting blocks  21  is more than two, the light emitting blocks  21  are arranged in a matrix form. In some embodiments, the light emitting blocks  21  are arranged all over the entire display substrate in a matrix form. 
     Specifically, in the embodiment of the present application, the first driving leads and the second driving leads are connected to an output terminal of a driving circuit, which specifically comprises a plurality of thin film transistors, capacitors, and signal lines (such as scanning signal lines, data signal lines, power signal lines, etc.) Since the improvement of the present application does not involve the thin film transistors, the capacitors, and the signal lines in the driving circuit, they will not be described in detail here. 
     In some embodiments, the embodiments of the present disclosure further provide a method for manufacturing a display substrate, specifically comprising: manufacturing, on a base substrate, a plurality of first light emitting units, a plurality of second light emitting units, a plurality of first driving leads, a plurality of second driving leads, a plurality of first branch leads, and a plurality of second branch leads. Specifically, the first driving leads and the second driving leads extend in the horizontal direction, the first branch leads and the second branch leads extend in the vertical direction, each of the first light emitting units comprises a plurality of first light emitting points, and each of the second light emitting units comprises a plurality of second light emitting points. 
     In a specific implementation, in the embodiment of the present application, the first light emitting units and the second light emitting units may be firstly manufactured, or the first driving leads, the second driving leads, the first branch leads, and the second branch leads may be firstly manufactured. A specific method for manufacturing the light emitting units and the second light emitting units is similar to those in the related art, and will not be described in detail here. For example, the first light emitting points in the first light emitting units and the second light emitting points in the second light emitting units may be manufactured in a current manner of manufacturing quantum dot light emitting points. 
     In a specific implementation, the first driving leads, the second driving leads, the first branch leads, and the second branch leads may be manufactured using a patterning process. In the embodiment of the present application, the patterning process comprises some or all of coating, exposure, development, etching, and removal of photoresist. 
     Based on the same concept, the embodiments of the present disclosure further provide a light field display apparatus. As shown in  FIG. 6 , the display apparatus comprises: the display substrate according to the embodiments of the present application; and a light angle adjustment structure  61  located on a light emitting side of the display substrate and configured to deflect light emitted from first light emitting points electrically connected to the same first driving lead to different directions. 
     In some embodiments, the light angle adjustment structure  61  is further configured to deflect light emitted from second light emitting points  2121  electrically connected to the same second driving lead  23  to different directions. 
     Specifically, as shown in  FIG. 6 , in the embodiment of the present application, the light angle adjustment structure  61  comprises a plurality of micro-lenses  611 , wherein a position of one light emitting block  21  corresponds to a position of one micro-lens  611 . Of course, in practical design, a position of one light emitting block  21  may also correspond to positions of a plurality of micro-lenses  611 . 
     Specifically, in the embodiment of the present application, one light emitting block  21  comprises a plurality of first light emitting units and a plurality of second light emitting units, and the micro-lenses  611  may enable light emitted by the first light emitting units to enter a left eye  62  of a person, and may enable light emitted by the second light emitting units to enter a right eye  63  of the person. In the embodiment of the present application, light emitted from first light emitting points connected to the same first driving lead is deflected to different directions and light emitted from second light emitting points connected to the same second driving lead is deflected to different directions by the micro-lenses  611  disposed in correspondence to the light emitting block  21 . In this way, human eyes may only view an image corresponding to one first light emitting unit and an image corresponding to one second light emitting unit in the same viewing angle in the same light emitting block  21 . 
     Based on the same concept, the embodiments of the present disclosure further provide a method for driving the light field display apparatus described above. As shown in  FIG. 7 , the method comprises the following steps. 
     In S 701 , a first driving signal is received from a driving circuit through the first driving leads. 
     In S 702 , light emitted from first light emitting points electrically connected to the same first driving lead is deflected by a light angle adjustment structure to different directions. 
     In some embodiments, the display substrate according to the embodiment of the present application further comprises the second light emitting units, the second light emitting points, and the second driving leads as described above. In this case, as shown in  FIG. 8 , the method further comprises the following steps. 
     In S 703 , a second driving signal is received from the driving circuit through the second driving leads. 
     In S 704 , light emitted from second light emitting points electrically connected to the same second driving lead is deflected by the light angle adjustment structure to different directions. 
     In the embodiment of the present application, during 2D display, the first driving signal is the same as the second driving signal, that is, the same driving signal is received through the first driving leads and the second driving leads, and during 3D display, the first driving signal is a left-eye driving signal, and the second driving signal is a right-eye driving signal, that is, the left-eye driving signal is received through the first driving leads, and the right-eye driving signal is received through the second driving leads. 
     In the embodiment of the present application, one first driving lead may drive a plurality of different first light emitting points to emit light, and one second driving lead may drive a plurality of different second light emitting points to emit light. Compared with the related art, in the embodiment of the present application, a number of light emitting points is significantly improved, and a number of light beams in the space which may be provided is significantly improved, so that a better light field display effect may be achieved. 
     In summary, the display substrate according to the specific embodiment of the present application has the following advantages. 
     Firstly, the display substrate according to the embodiment of the present application comprises at least one light emitting block on a base substrate and a plurality of first driving leads, wherein each of the light emitting blocks comprises a plurality of first light emitting units, and each of the first light emitting units comprises a plurality of first light emitting points. In each of the light emitting blocks, first light emitting points located at the same positions in the respective first light emitting units are connected to the same first driving lead, which are used to receive a first driving signal output from a driving circuit. In the embodiment of the present disclosure, one of the first driving leads may drive a plurality of first light emitting points to emit light at the same time. Compared with the related art, in the embodiment of the present application, a number of light emitting points is significantly improved, and a number of light beams in the space which may be provided is significantly improved, so that a better light field display effect may be achieved. 
     Secondly, the display substrate according to the embodiment of the present application is a self-luminous type top emission display substrate, so that the arrangement of the driving leads and the branch leads may not affect a light emitting efficiency of the display substrate, and a resolution of the display substrate may be improved. 
     Thirdly, the display substrate according to the embodiment of the present application further comprises a plurality of second driving leads, which are used to receive a second driving signal output by the driving circuit, wherein each of the light emitting blocks further comprises a plurality of second light emitting units, and each of the second light emitting units comprises a plurality of second light emitting points. In each of the light emitting blocks, second light emitting points located at the same positions in the respective second light emitting units are connected to the same second driving lead. In the embodiment of the present application, one of the second driving leads may drive a plurality of second light emitting points to emit light at the same time. Compared with the related art, in the embodiment of the present application, a number of light emitting points is significantly improved, and a number of light beams in the space which may be provided is significantly improved, so that a better light field display effect may be achieved. 
     The above description is only a part of the embodiments of the present application, and it should be pointed out that those of ordinary in the art may make various modifications without departing from the principles of the present application, and these modifications should also be considered to fall within the protection scope of the present application.