Light-emitting substrate and display apparatus

Abstract

The present application relates to the technical field of display, and discloses a light-emitting substrate and a display apparatus. The light-emitting substrate comprises a back plate, a reflective sheet, an adhesive layer, and multiple light-emitting units. The adhesive layer is disposed between the reflective sheet and the back plate, and an orthographic projection of the adhesive layer on the back plate may be within a region in which a strip-shaped portion and / or a main body portion is located. In this way, after the reflective sheet is adhered to the back plate by means of the adhesive layer, the adhesive layer will not be distributed in spacing regions between multiple strip-shaped portions in the back plate. Thus, during subsequent packaging and transportation of the light-emitting substrate, wrinkles or contamination on the surface of the reflective sheet adhered to the back plate, caused by the adhesive layer being distributed in the spacing regions between the multiple strip-shaped portions, can be avoided, thereby improving the product yield of the light-emitting substrate.

Description

Light-emitting substrate and display device Technical Field

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

[0002] As a new type of backlight, sub-millimeter light emitting diode (Mini LED) backlight can achieve regional dimming in a smaller range by densely arranging a large number of Mini LED chips. Compared with traditional light-emitting substrates, it can achieve better brightness uniformity within a smaller mixing distance, thereby greatly reducing the thickness of the light-emitting substrate.

[0003] Typically, a Mini LED light-emitting substrate includes a light board and a reflector located on one side of the light board. The reflector can increase the brightness of the light emitted from the light-emitting substrate in the forward direction, thereby improving the light-emitting efficiency of the light-emitting substrate.

[0004] To reduce the manufacturing cost of the light-emitting substrate, the light panel is designed to have a comb-tooth shape. However, after the comb-tooth-shaped light panel is bonded to the reflector using the adhesive layer applied throughout the reflector, some areas of the adhesive layer are exposed. This exposed adhesive is prone to wrinkling or becoming dirty during packaging and transportation, resulting in a low product yield.

[0005] Summary of the Invention

[0006] The present invention provides a light-emitting substrate and a display device. The present invention can solve the problem of low product yield of the light-emitting substrate. The technical solution is as follows:

[0007] In one aspect, a light-emitting substrate is provided, comprising:

[0008] A back plate, comprising: a plurality of spaced-apart strips, and a main body fixedly connected to the same end of the plurality of strips;

[0009] A plurality of light-emitting units arranged in an array on one side of the back plate;

[0010] a reflective sheet located on a side of the back panel facing the plurality of light-emitting units, the reflective sheet having a plurality of openings corresponding one-to-one to the plurality of light-emitting units, wherein the orthographic projections of the light-emitting units on the back panel are located within the orthographic projections of the corresponding openings on the back panel;

[0011] And, the adhesive layer located between the reflective sheet and the back panel, the orthographic projection of the adhesive layer on the back panel is located in the area where the strip portion and / or the main body portion are located, and the orthographic projection of the adhesive layer on the back panel does not overlap with the area between two adjacent strip portions.

[0012] Optionally, the adhesive layer includes: a plurality of separately set adhesive blocks, the plurality of adhesive blocks are arranged in an array, and the orthographic projections of some of the plurality of adhesive blocks on the back panel are located in the area where the strip portion is located, and the orthographic projections of another portion of the plurality of adhesive blocks on the back panel are located in the area where the main body portion is located.

[0013] Optionally, the orthographic projection of the adhesive block on the back panel does not overlap with the orthographic projection of the opening on the back panel.

[0014] Optionally, the plurality of light-emitting units are arranged in a plurality of columns along the first direction and in a plurality of rows along the second direction; the plurality of strip portions in the back plate are arranged along the first direction;

[0015] Wherein, in the second direction, one bonding block is distributed between two adjacent light-emitting units.

[0016] Optionally, in the first direction, the distance between two adjacent bonding blocks is greater than or equal to the distance between two adjacent strip portions.

[0017] Optionally, the light emitting units arranged in a row along the second direction include: a plurality of first light emitting units located on the same strip portion, and a plurality of second light emitting units located on the main body portion;

[0018] There is one bonding block distributed between every two adjacent first light-emitting units, and there is one bonding block distributed between at least two adjacent second light-emitting units among the plurality of second light-emitting units.

[0019] Optionally, the light-emitting units arranged in a row along the second direction further include: a third light-emitting unit located between the plurality of first light-emitting units and the plurality of second light-emitting units, a portion of the third light-emitting unit being located on the strip portion, and another portion of the third light-emitting unit being located on the main body portion;

[0020] There is one bonding block distributed between the third light emitting unit and the adjacent first light emitting unit, and there is one bonding block distributed between the third light emitting unit and the adjacent second light emitting unit.

[0021] Optionally, the bonding block is not provided between at least two adjacent second light-emitting units among the plurality of second light-emitting units.

[0022] Optionally, all the second light-emitting units distributed on the main body include: second light-emitting units in the Nth row arranged along the first direction, and second light-emitting units in the N-1th row arranged along the first direction and adjacent to the second light-emitting units in the Nth row, the second light-emitting units in the N-1th row being closer to the plurality of strip portions than the second light-emitting units in the Nth row, and a device arrangement area being defined between the second light-emitting units in the N-1th row and the second light-emitting units in the Nth row;

[0023] The light emitting substrate further comprises: a plurality of electronic devices fixed in the device setting area;

[0024] Wherein, the plurality of bonding blocks are all distributed outside the device setting area.

[0025] Optionally, the second light-emitting units in the N-1th row are arranged adjacent to a row of third light-emitting units distributed along the first direction;

[0026] Wherein, a row of the bonding blocks arranged along the first direction is distributed between the N-1th row of second light-emitting units and a row of the third light-emitting units.

[0027] Optionally, all the second light-emitting units distributed on the main body further include: second light-emitting units in the N+1th row arranged along the first direction, the second light-emitting units in the N+1th row being distributed on a side of the second light-emitting units in the Nth row away from the second light-emitting units in the N-1th row, and being arranged adjacent to the second light-emitting units in the Nth row;

[0028] Wherein, a row of the bonding blocks arranged along the first direction is distributed between the second light-emitting units in the Nth row and the second light-emitting units in the N+1th row.

[0029] Optionally, in the first direction, the width of the bonding block is smaller than the width of the strip portion;

[0030] And / or, the width of the bonding block in the second direction is smaller than the distance between two adjacent openings distributed in the second direction.

[0031] Optionally, a side of the strip portion where the light-emitting unit is provided has a plurality of first silk-screen patterns, and the plurality of first silk-screen patterns correspond one-to-one to the plurality of bonding blocks distributed on the strip portion;

[0032] The first silk-screen pattern has two first silk-screen lines arranged opposite to each other; the orthographic projection of the adhesive block corresponding to the first silk-screen pattern on the back plate has two first boundaries, and the two first silk-screen lines correspond to the two first boundaries one by one;

[0033] Wherein, the maximum distance between the corresponding first silk screen line and the first boundary is less than or equal to a first preset distance.

[0034] Optionally, a side of the main body where the light-emitting unit is provided has a plurality of second silk-screen patterns, and the plurality of second silk-screen patterns correspond one-to-one to the plurality of rows of bonding blocks distributed on the main body;

[0035] The second silk-screen pattern has two second silk-screen lines arranged opposite to each other; for any one adhesive block in a row of adhesive blocks corresponding to the second silk-screen pattern, the orthographic projection of the adhesive block on the back plate has two second boundaries, and the two second silk-screen lines correspond one-to-one to the two second boundaries;

[0036] Wherein, the maximum distance between the corresponding second silk screen line and the second boundary is less than or equal to a second preset distance.

[0037] Optionally, the orthographic projection areas of the adhesive blocks on the backplane are all equal.

[0038] Optionally, the main body has at least one positioning hole, and the at least one positioning hole is used to cooperate with at least one positioning post provided in the frame for positioning;

[0039] Wherein, the orthographic projection of the adhesive layer on the back plate does not overlap with the area where the at least one positioning hole is located.

[0040] On the other hand, a display device is provided, comprising: any one of the above-mentioned light-emitting substrates, and a liquid crystal display panel located on the light-emitting side of the light-emitting substrate.

[0041] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0042] A light-emitting substrate comprises: a backplane, a reflective sheet, an adhesive layer, and a plurality of light-emitting units. Since an adhesive layer is provided between the reflective sheet and the backplane, and the orthographic projection of the adhesive layer on the backplane can be located within the region where the strip-shaped portion and / or the main body portion are located, after the reflective sheet is bonded to the backplane via the adhesive layer, the adhesive layer will not be distributed within the spacing regions between the plurality of strip-shaped portions in the backplane. Therefore, during the subsequent packaging and transportation of the light-emitting substrate, wrinkles or dirt on the side where the reflective sheet is bonded to the backplane due to the adhesive layer being distributed within the spacing regions between the plurality of strip-shaped portions can be avoided, thereby improving the product yield of the light-emitting substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] FIG1 is a schematic structural diagram of a light panel provided by the related art;

[0045] FIG2 is a front view of a light panel and a reflective sheet provided by the related art;

[0046] FIG3 is a back view of a light panel and a reflective sheet provided by the related art;

[0047] FIG4 is a schematic structural diagram of a light-emitting substrate provided in an embodiment of the present application;

[0048] FIG5 is a schematic structural diagram of another light-emitting substrate provided in an embodiment of the present application;

[0049] FIG6 is a schematic diagram of the cooperation between a back plate and an adhesive layer in a light-emitting substrate provided in an embodiment of the present application;

[0050] FIG7 is a schematic diagram of the cooperation between the back plate and the adhesive layer in another light-emitting substrate provided in an embodiment of the present application;

[0051] FIG8 is an enlarged view of a partial structure of a light-emitting substrate provided in an embodiment of the present application;

[0052] FIG9 is a schematic diagram of the coordination between a back plate and a light-emitting unit in a light-emitting substrate provided in an embodiment of the present application;

[0053] FIG10 is an enlarged view of a partial structure of another light-emitting substrate provided in an embodiment of the present application;

[0054] FIG11 is an enlarged view of a partial structure of another light-emitting substrate provided in an embodiment of the present application;

[0055] FIG12 is a top view of an adhesive layer provided in an embodiment of the present application;

[0056] FIG13 is a side view of an adhesive layer provided in an embodiment of the present application;

[0057] FIG14 is a schematic diagram of a cut adhesive layer provided in an embodiment of the present application;

[0058] FIG15 is a schematic structural diagram of another light-emitting substrate provided in an embodiment of the present application;

[0059] FIG16 is a schematic cross-sectional view of the film layer of the light-emitting substrate shown in FIG15 at AA′;

[0060] FIG17 is a schematic structural diagram of a backlight module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0061] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0062] Please refer to Figures 1, 2, and 3. Figure 1 is a schematic diagram of the structure of a light board provided by the related art, Figure 2 is a front view of a light board and a reflective sheet attached to each other provided by the related art, and Figure 3 is a rear view of a light board and a reflective sheet attached to each other provided by the related art. The light-emitting substrate 00 may include: a light board 01 and a reflective sheet 02. Specifically, the light board 01 may include: a light board body 01b and a plurality of lamp beads 01a arranged in an array on one side of the light board body 01b. The light board body 01b can drive the lamp beads 01a to emit light outward.

[0063] Currently, to reduce the manufacturing cost of the light-emitting substrate 00, the light board body 01b of the light board 01 is typically designed to have a comb-like shape. The light board 01 within the light-emitting substrate 00 can provide backlight for a liquid crystal display panel through the light emitted by the lamp beads 01a. When the LCD panel is placed on the light-emitting side of the light-emitting substrate 00, the light emitted by the light-emitting substrate 00 can be directed toward the LCD panel, allowing the LCD panel to display images normally.

[0064] The reflective sheet 02 in the light-emitting substrate 00 can be located on one side of the light board 01. Here, the reflective sheet 02 can increase the brightness of the light emitted from the light-emitting substrate 00 in the forward direction, thereby improving the luminous efficiency of the light-emitting substrate 00. The side of the reflective sheet 02 facing the light board 01 can have a full layer of adhesive, which can be used to bond the light board 01 to the reflective sheet 02.

[0065] However, after the light board 01 and the reflector sheet 02 are bonded together using the adhesive layer provided throughout the reflector sheet 02, part of the adhesive layer on the reflector sheet 02 is distributed in the interdental area of ​​the light board 01. Subsequently, during the packaging and transportation of the light-emitting substrate 00, the adhesive layer on the reflector sheet 02 in the interdental area is prone to wrinkling or contamination, resulting in a low product yield of the light-emitting substrate 00.

[0066] Please refer to Figures 4 and 5. Figure 4 is a schematic diagram of the structure of a light-emitting substrate provided in an embodiment of the present application, and Figure 5 is a schematic diagram of the structure of another light-emitting substrate provided in an embodiment of the present application. The light-emitting substrate 000 may include: a backplane 100, a reflective sheet 300, an adhesive layer 400, and a plurality of light-emitting units 200.

[0067] The back plate 100 in the light emitting substrate 000 may include: a plurality of spaced strip portions 101, and a main body portion 102 fixedly connected to the same end of the plurality of strip portions 101. In other words, the back plate 100 may be in a comb-shaped form, which reduces the manufacturing cost of the back plate 100.

[0068] The plurality of light-emitting units 200 arranged in an array in the light-emitting substrate 000 may be located on one side of the backplane 100. Here, the light-emitting units 200 in the light-emitting substrate 000 may include a plurality of light-emitting diodes (LEDs). Here, the plurality of light-emitting units 200 may be electrically connected to the backplane 100 in the light-emitting substrate 000. The backplane 100 may drive the plurality of light-emitting units 200 to emit light, enabling the light-emitting substrate 000 to provide backlight for the liquid crystal display panel.

[0069] The reflective sheet 300 in the light-emitting substrate 000 can be located on the side of the backplane 100 facing the multiple light-emitting units 200. The reflective sheet 300 can have multiple openings 300a corresponding one-to-one to the multiple light-emitting units 200, and the orthographic projections of the light-emitting units 200 on the backplane 100 can be located within the orthographic projections of the corresponding openings 300a on the backplane 100. In other words, the orthographic projections of the reflective sheet 300 on the backplane 100 do not overlap with the orthographic projections of the light-emitting units 200 on the backplane 100. This ensures that the reflective sheet 300 does not block the light-emitting units 200, allowing light emitted by the light-emitting units 200 to be transmitted through the corresponding openings 300a in the reflective sheet 300. Furthermore, the reflective sheet 300 can reflect light emitted laterally from the light-emitting units 200, allowing the reflected light to be emitted forward. This can increase the brightness of the forward-facing light emitted by the light-emitting substrate 000 and improve the luminous efficiency of the light-emitting substrate 000.

[0070] The adhesive layer 400 in the light-emitting substrate 000 can be located between the reflective sheet 300 and the back panel 100. Here, the adhesive layer 400 can be bonded to the back surface of the reflective sheet 300 and the back panel 100, respectively, and the reflective sheet 300 and the back panel 100 can be stably connected together through the adhesive layer 400. The orthographic projection of the adhesive layer 400 on the back panel 100 can be located within the area where the strip portions 101 and / or the main body portion 102 are located, and the orthographic projection of the adhesive layer 400 on the back panel 100 can not overlap with the area between two adjacent strip portions 101. In other words, the adhesive layer 400 can be located within the area where the back panel 100 is located. In this way, it can be ensured that the adhesive layer 400 is not distributed in the spacing area between multiple strip portions 101 in the back panel 100.

[0071] To this end, in the subsequent packaging and transportation process of the light-emitting substrate 000, it is possible to avoid wrinkles or dirt on the side where the reflective sheet 300 and the back panel 100 are bonded due to the adhesive layer 400 being distributed in the spacing area between the multiple strip-shaped portions 101, thereby improving the product yield of the light-emitting substrate 000.

[0072] In summary, the light-emitting substrate provided in the embodiment of the present application includes: a back panel, a reflective sheet, an adhesive layer, and a plurality of light-emitting units. Since an adhesive layer is provided between the reflective sheet and the back panel, and the orthographic projection of the adhesive layer on the back panel can be located in the area where the strip portion and / or the main body portion are located. In this way, after the reflective sheet is bonded to the back panel through the adhesive layer, the adhesive layer will not be distributed in the spacing area between the multiple strip portions in the back panel. For this reason, subsequently, during the packaging and transportation process of the light-emitting substrate, it can be avoided that the side where the reflective sheet is bonded to the back panel is wrinkled or dirty due to the adhesive layer being distributed in the spacing area between the multiple strip portions, thereby improving the product yield of the light-emitting substrate.

[0073] In an embodiment of the present application, please refer to FIG6 , which is a schematic diagram of the coordination between the backplane and the adhesive layer in a light-emitting substrate provided in an embodiment of the present application. The adhesive layer 400 in the light-emitting substrate 000 may include: a plurality of separately arranged adhesive blocks 401, which may be arranged in an array between the backplane 100 and the reflector 300, and the orthographic projections of some of the adhesive blocks 401 on the backplane 100 may be located in the area where the strip 101 is located, and the orthographic projections of another portion of the adhesive blocks 401 on the backplane 100 may be located in the area where the main body 102 is located. In this way, it can be ensured that the strip 101 in the backplane 100 can be bonded to the reflector 300 through the adhesive blocks 401, and the main body 102 in the backplane 100 can also be bonded to the reflector 300 through the adhesive blocks 401, thereby ensuring that the reflector 300 and the backplane 100 are more firmly connected together.

[0074] In the present application, the orthographic projection of the adhesive block 401 in the adhesive layer 400 on the back plate 100 may not overlap with the orthographic projection of the plurality of openings 300a in the reflective sheet 300 on the back plate 100. This ensures that the adhesive block 401 does not protrude from the openings 300a in the reflective sheet 300, and further ensures that the side of the adhesive block 401 facing away from the back plate 100 is not contaminated by dust that enters through the openings 300a of the reflective sheet 300, thereby further improving the product yield of the light-emitting substrate 000.

[0075] In the embodiment of the present application, as shown in Figure 6, the plurality of light-emitting units 200 in the light-emitting substrate 000 can be arranged in a plurality of columns along the first direction A1 and can be arranged in a plurality of rows along the second direction A2. In the present application, the plurality of strips 101 in the back plate 100 can be arranged in the first direction A1.

[0076] In this case, to avoid distributing bonding blocks 401 between two adjacent strips 101, it is necessary to distribute one bonding block 401 between two adjacent light-emitting units 200 in the second direction A2. In other words, one bonding block 401 can be distributed between two adjacent light-emitting units 200 arranged in a row of light-emitting units 200. This ensures that the backplane 100 and the reflective sheet 300 are securely bonded via multiple bonding blocks 401, while also ensuring that none of these bonding blocks 401 are distributed within the spacing between two adjacent strips 101.

[0077] In the present application, referring to FIG. 6 , in a first direction A1, the distance d1 between two adjacent adhesive blocks 401 can be greater than or equal to the distance d2 between two adjacent strips 101. That is, in the first direction A1, the side edges of the adhesive blocks 401 do not protrude beyond the strips 101. This prevents portions of the adhesive blocks 401 from being located within the spaces between the multiple strips 101. This ensures that during the packaging and transportation of the backplane 100, the adhesive blocks 401 will not adhere to the device base supporting the backplane 100 or the external packaging of the backplane 100, thereby preventing any impact on the transportation of the backplane 100.

[0078] In the embodiment of the present application, referring again to FIG. 6 , a row of light-emitting units 200 arranged along the second direction A2 may include: a plurality of first light-emitting units 201 located on the same strip 101 of the backplane 100, and a plurality of second light-emitting units 202 located on the main body 102 of the backplane 100. That is, the first light-emitting units 201 arranged in a row may be distributed on the same strip 101, and correspondingly, a row of second light-emitting units 202 may be distributed on the main body 102, arranged in the same row as the first light-emitting units 201. It should be noted that in the backplane 100, the length of the strip 101 in the second direction A2 may be significantly greater than the width of the main body 102 in the second direction A2, thereby minimizing the material used in the manufacturing process of the backplane 100 and thus reducing the manufacturing cost of the backplane 100. To this end, the number of first light-emitting units 201 in a row distributed on the strip 101 may be significantly greater than the number of second light-emitting units 202 in a row distributed on the main body 102.

[0079] In the present application, for a row of first light-emitting units 201 distributed on the same strip 101, an adhesive block 401 may be distributed between every two adjacent first light-emitting units 201 in the row. This ensures that a greater number of adhesive blocks 401 are distributed on the strip 101, allowing the strip 101 to be more firmly bonded to the reflective sheet 300.

[0080] For a row of second light-emitting units 202 distributed on the main body 102, an adhesive block 401 may be distributed between at least two adjacent second light-emitting units 202 in the row. This ensures that the adhesive blocks 401 are properly distributed on the main body 102, thereby ensuring that the main body 102 can also be attached to the reflective sheet 300 via the adhesive blocks 401.

[0081] In the present application, as shown in FIG6 , a column of light-emitting units 200 arranged along the second direction A2 may further include a third light-emitting unit 203 located between the plurality of first light-emitting units 201 and the plurality of second light-emitting units 203. Here, a portion of the third light-emitting unit 203 may be located on the strip portion 101 of the back panel 100, and another portion of the third light-emitting unit 203 may be located on the main body portion 102 of the back panel 100.

[0082] Among them, an adhesive block 401 may be distributed between the third light-emitting unit 203 and the adjacent first light-emitting unit 201, and an adhesive block 401 may be distributed between the third light-emitting unit 203 and the adjacent second light-emitting unit 202. In this way, the number of adhesive blocks 401 distributed on the strip portion 101 of the back plate 100 can be further increased, and the number of adhesive blocks 401 distributed on the main body portion 102 of the back plate 100 can also be further increased, thereby further improving the bonding strength between the back plate 100 and the reflective sheet 300.

[0083] In the present application, for a row of second light-emitting units 202 distributed on the main body 102 , the bonding block 401 may not be provided between at least two adjacent second light-emitting units 202 in the row of second light-emitting units 202 .

[0084] For example, please refer to Figure 7, which is a schematic diagram of the coordination between the backplane and the adhesive layer in another light-emitting substrate provided in an embodiment of the present application. All the second light-emitting units 202 distributed on the main body 102 in the backplane 100 may include: the second light-emitting units B1 in the N-1th row arranged along the first direction A1, and the second light-emitting units B2 in the Nth row arranged along the first direction A1 and adjacent to the second light-emitting units B1 in the N-1th row. Here, the second light-emitting units B1 in the N-1th row may be closer to the strips 101 in the multiple backplanes 100 relative to the second light-emitting units B2 in the Nth row. In one possible implementation, for any row of second light-emitting units 202 arranged along the first direction A1 on the main body 102 in the backplane 100, the number of second light-emitting units 202 in this row may be equal to the number of strips 101 in the backplane 100. Wherein, N is an integer greater than 1.

[0085] In the present application, a device setting area 00a may be provided between the second light-emitting unit B1 in the N-1th row and the second light-emitting unit B2 in the Nth row. The light-emitting substrate 000 may further include: a plurality of electronic devices 500 fixed within the device setting area 00a. Here, the plurality of electronic devices 500 in the light-emitting substrate 000 may include: a connector 502 and a plurality of driver chips 501. The connector 502 may be used to electrically connect to the driver backplane in the display device, and the driver chip 501 is used to provide a drive signal to each light-emitting unit 200 through the circuit integrated within the backplane 100, so that each of these light-emitting units 200 can emit light outward.

[0086] As shown in FIG7 , the plurality of adhesive blocks 401 in the adhesive layer 400 can be distributed outside the device placement area 00a. That is, there is no adhesive block 401 between the second light-emitting unit B1 in the N-1th row and the second light-emitting unit B2 in the Nth row. This ensures that the adhesive block 401 does not affect the normal operation of the plurality of electronic devices 500 distributed within the device placement area 00a.

[0087] In the embodiment of the present application, referring to FIG7 , the N-1th row of second light-emitting units B1 and a row of third light-emitting units 203 distributed along the first direction A1 on the main body 102 can be disposed adjacent to each other. A row of bonding blocks 401 arranged along the first direction A1 can be disposed between the N-1th row of second light-emitting units B1 and the row of third light-emitting units 203.

[0088] Here, the number of second light-emitting units 202 in the N-1th row of second light-emitting units B1 can be equal to the number of third light-emitting units 203 in a row of third light-emitting units 203, and equal to the number of bonding blocks 401 in a row of bonding blocks 401 located between the N-1th row of second light-emitting units B1 and a row of third light-emitting units 203. In this case, in the N-1th row of second light-emitting units B1 and a row of third light-emitting units 203, a bonding block 401 is disposed between each group of adjacent third light-emitting units 203 and second light-emitting units 202 in the second direction A2. In this manner, the number of bonding blocks 401 distributed on the main body 102 can be further increased, thereby further improving the bond strength between the main body 102 and the reflective sheet 300.

[0089] In the present application, as shown in FIG7 , all second light-emitting units 202 distributed on the main body 102 of the backplane 100 may further include: second light-emitting units B3 in the N+1th row arranged along the first direction A1; the second light-emitting units B3 in the N+1th row may be distributed on a side of the second light-emitting units B2 in the Nth row away from the second light-emitting units B1 in the N-1th row; and the second light-emitting units B3 in the N+1th row may be arranged adjacent to the second light-emitting units B2 in the Nth row. A row of bonding blocks 401 arranged along the first direction A1 may be distributed between the second light-emitting units B2 in the Nth row and the second light-emitting units B3 in the N+1th row.

[0090] Here, the number of second light-emitting units 202 in the Nth row of second light-emitting units B2 can be equal to the number of third light-emitting units 203 in the N+1th row of second light-emitting units B3, and equal to the number of bonding blocks 401 in the row of bonding blocks 401 located between the Nth row of second light-emitting units B2 and the N+1th row of second light-emitting units B3. In this case, in the Nth row of second light-emitting units B2 and the N+1th row of second light-emitting units B3, a bonding block 401 is disposed between each pair of adjacent second light-emitting units 202 arranged in the second direction A2. This further increases the number of bonding blocks 401 distributed on the main body 102, thereby further improving the bond strength between the main body 102 and the reflective sheet 300.

[0091] In the embodiment of the present application, please refer to Figure 8, which is an enlarged view of a partial structure of a light-emitting substrate provided in the embodiment of the present application. In the first direction A1, the width d3 of the adhesive block 401 in the adhesive layer 400 can be smaller than the width d4 of the strip portion 101 in the backplane 100. And / or, the width d5 ​​of the adhesive block 401 in the adhesive layer 400 in the second direction A2 can be smaller than the distance d6 between the openings 300a in two adjacent reflective sheets 300 distributed in the second direction A2.

[0092] For example, the first calculation formula may be used to obtain the width d3 of the adhesive block 401 in the adhesive layer 400; the first calculation formula is: d3 = d4 - 2 × c1

[0093] Wherein, c1 represents the unilateral shrinkage. During the bonding process of the adhesive block 401 and the strip portion 101 of the back panel 100, setting the unilateral shrinkage c1 can effectively prevent the side edge of the adhesive block 401 from protruding beyond the strip portion 401 due to bonding errors, thereby ensuring that the adhesive block 401 does not protrude from the gap between two adjacent strip portions 401. Here, the value range of c1 may be related to the bonding method used to bond the adhesive block 401 to the back panel 100. For example, when manually bonding the adhesive block 401 to the back panel 100, the value range of c1 is relatively large, for example, the value range of c1 is 0.1 mm to 1.6 mm. For another example, when automatically bonding the adhesive block 401 to the back panel 100, the value range of c1 is relatively small, for example, the value range of c1 is 0.1 mm to 0.5 mm.

[0094] The width d5 ​​of the adhesive block 401 in the adhesive layer 400 can be obtained by using a second calculation formula; the second calculation formula is: d5 = d6 - 2 × a - 2 × b - 2 × c2

[0095] Wherein, a represents the radius of the light-emitting unit 200, b represents the difference between the radius of the opening 300a in the reflective sheet 300 and the radius of the light-emitting unit 200, and c2 represents the unilateral indentation. During the bonding process between the adhesive block 401 and the strip portion 101 in the back panel 100, setting the unilateral indentation c2 can effectively prevent the adhesive block 401 from being exposed from the opening 300a in the reflective sheet 300 due to bonding errors, thereby ensuring that the side of the adhesive block 401 facing away from the back panel 100 is not contaminated by dust intruding through the opening 300a in the reflective sheet 300. It should be noted that the value range of c2 can be the same as the value range of c1 in the above embodiment, and will not be repeated here.

[0096] Here, the value range of the difference b between the radius of the opening 300a in the reflective sheet 300 and the radius of the light-emitting unit 200 may be related to the size of the reflective sheet 300, the material of the reflective sheet 300, and the accuracy of bonding the reflective sheet 300 to the back plate 100. For example, the value range of b is 2 mm to 4 mm.

[0097] In the embodiment of the present application, please refer to Figure 9, which is a schematic diagram of the coordination between the back plate and the light-emitting unit in a light-emitting substrate provided in the embodiment of the present application. The side of the strip portion 101 of the back plate 100 where the light-emitting unit 200 is provided may have multiple first silk-screen patterns 101a, wherein the multiple first silk-screen patterns 101a may correspond one-to-one with the multiple adhesive blocks 401 distributed on the strip portion 101.

[0098] In this application, please refer to Figure 10, which is an enlarged view of a partial structure of another light-emitting substrate provided in an embodiment of the present application. The first silk-screen pattern 101a in the strip portion 101 can have two first silk-screen lines 1011 arranged opposite each other, and the orthographic projection of the bonding block 401 corresponding to the first silk-screen pattern 101a on the backplane can have two first boundaries. Here, the two first silk-screen lines 1011 in the first silk-screen pattern 101a can correspond one-to-one with the two first boundaries in the bonding block 401 corresponding to the first silk-screen pattern 101a.

[0099] It should be noted that the first silk-screen pattern 101a can play a positioning role in the process of attaching the adhesive block 401 to the strip portion 101 in the back plate 100. For example, during the process of manufacturing the back plate 100, the first silk-screen pattern 101a can be laser-engraved on the strip portion 101 at the position where the adhesive block 401 is to be attached. Subsequently, during the process of manually attaching the adhesive block 401, the operator can directly attach the adhesive block 401 based on the position of the first silk-screen pattern 101a. This facilitates the operator's operation and ensures a good attachment effect between the adhesive block 401 and the strip portion 101.

[0100] 10 , the maximum distance between the first silk screen line 1011 in the corresponding first silk screen pattern 101a and the first boundary of the bonding block 401 may be less than or equal to a first preset distance. For example, the first preset distance may range from 0.1 mm to 1.5 mm.

[0101] In an embodiment of the present application, as shown in Figure 9, the side of the main body 102 in the back panel 100 where the light-emitting unit 200 is set may have multiple second silk-screen patterns 102a, wherein the multiple second silk-screen patterns 102a can correspond one-to-one to the multiple rows of adhesive blocks 401 distributed on the main body 102.

[0102] In this application, please refer to Figure 11, which is an enlarged view of a partial structure of another light-emitting substrate provided in an embodiment of the present application. The second silk-screen pattern 102a in the main body 102 can have two second silk-screen lines 1021 arranged opposite to each other. For any one of the adhesive blocks 401 in the row corresponding to the second silk-screen pattern 102a, the orthographic projection of the adhesive block 401 on the back panel 100 can have two second boundaries. Here, the two second silk-screen lines 1021 in the second silk-screen pattern 102a can correspond one-to-one with the two second boundaries in the row corresponding to the second silk-screen pattern 102a.

[0103] It should be noted that the second silk-screen pattern 102a can play a positioning role in the process of attaching the adhesive block 401 to the main body 102 of the backplane 100. For example, during the process of manufacturing the backplane 100, the second silk-screen pattern 102a can be laser-engraved on the main body 102 at the position where the adhesive block 401 is to be attached. Subsequently, during the process of manually attaching the adhesive block 401, the operator can directly attach the adhesive block 401 based on the position of the second silk-screen pattern 102a. This can facilitate the operator's operation and ensure a good attachment effect between the adhesive block 401 and the main body 102.

[0104] 11 , the maximum distance between the second silk screen line 1021 in the corresponding second silk screen pattern 102a and the second boundary of the bonding block 401 may be less than or equal to a second preset distance. For example, the second preset distance may range from 0.1 mm to 1.5 mm.

[0105] In an embodiment of the present application, the areas of the positive projections of the adhesive blocks 401 in each adhesive layer 400 on the back panel 100 can be equal. In this way, the adhesive blocks 401 arranged in the back panel 100 can be more evenly distributed, and the reflective sheet 300 can be more firmly bonded to the back panel 100.

[0106] In this application, please refer to Figures 12, 13, and 14. Figure 12 is a top view of an adhesive layer provided in an embodiment of the present application, Figure 13 is a side view of an adhesive layer provided in an embodiment of the present application, and Figure 14 is a schematic diagram of an adhesive layer provided in an embodiment of the present application after cutting. First, as shown in Figure 12, a jig or device can be used to attach the pre-cut strips of adhesive layer 400 to the first protective layer 402 at intervals. Then, as shown in Figure 13, the second protective layer 403 can be attached to the side of the adhesive layer 400 facing away from the first protective layer 402. Then, the adhesive layer 400 is cut along the second direction A2. The effect after cutting is shown in Figure 11, and a plurality of adhesive blocks 401 arranged at intervals can be obtained.

[0107] In the embodiment of the present application, please refer to Figures 15 and 16. Figure 15 is a structural schematic diagram of another light-emitting substrate provided in the embodiment of the present application, and Figure 16 is a schematic cross-sectional diagram of the film layer of the light-emitting substrate shown in Figure 15 at A-A'. First, the operator can tear off the second protective layer 403 first, and then, according to the position of the first silk-screen pattern 101a, the adhesive block 401 can be attached to the strip portion 101 in the back panel 100, and then, the first protective layer 402 can be torn off to complete the attachment of the adhesive block 401 corresponding to the first silk-screen pattern 101a. Similarly, the operator can tear off the second protective layer 403 first, and then, according to the position of the second silk-screen pattern 102a, the adhesive block 401 can be attached to the main body 102 in the back panel 100, and then, the first protective layer 402 can be torn off to complete the attachment of the adhesive block 401 corresponding to the second silk-screen pattern 102a.

[0108] Subsequently, when the reflective sheet 300 and the back panel 100 are bonded together, the reflective sheet 300 can be positioned and adsorbed in a pressing jig. After the reflective sheet 300 and the back panel 100 are pressed together by the pressing jig and vacuum pressure is maintained, the reflective sheet 300 can be bonded to one side of the back panel 100.

[0109] In an embodiment of the present application, please refer to Figure 7. The main body 102 in the back panel 100 may have at least one positioning hole K, and the at least one positioning hole K is used to cooperate with at least one positioning column set in the frame for positioning. In this way, through the cooperation between at least one positioning hole K and at least one positioning column, the back panel 100 can be assembled into the frame more accurately.

[0110] The orthographic projection of the adhesive layer 400 on the back panel 100 does not overlap with the area where the at least one positioning hole K is located. For example, the orthographic projection of each adhesive block 401 in the adhesive layer 400 on the back panel 100 does not overlap with the area where the at least one positioning hole K is located. This ensures that the adhesive block 401 does not affect the normal use of the positioning hole K and does not protrude from the positioning hole K.

[0111] In summary, the light-emitting substrate provided in the embodiment of the present application includes: a back panel, a reflective sheet, an adhesive layer, and a plurality of light-emitting units. Since an adhesive layer is provided between the reflective sheet and the back panel, and the orthographic projection of the adhesive layer on the back panel can be located in the area where the strip portion and / or the main body portion are located. In this way, after the reflective sheet is bonded to the back panel through the adhesive layer, the adhesive layer will not be distributed in the spacing area between the multiple strip portions in the back panel. For this reason, subsequently, during the packaging and transportation process of the light-emitting substrate, it can be avoided that the side where the reflective sheet is bonded to the back panel is wrinkled or dirty due to the adhesive layer being distributed in the spacing area between the multiple strip portions, thereby improving the product yield of the light-emitting substrate.

[0112] The embodiment of the present application provides a backlight module. Please refer to Figure 17, which is a schematic structural diagram of a backlight module provided by the embodiment of the present application. The backlight module 001 may include: a frame 001a and a light-emitting substrate 000. The light-emitting substrate 000 may be the light-emitting substrate in the above embodiment.

[0113] The frame 001a in the backlight module 001 can have at least one positioning post 0011. The at least one positioning hole K provided on the back plate 100 in the light-emitting substrate 000 can correspond one-to-one with the at least one positioning post 0011. After the light-emitting substrate 000 is assembled into the frame 001a, each positioning post 0011 in the frame 001a can be inserted into the corresponding positioning hole K provided on the back plate 100. Through the coordinated positioning of the positioning posts 0011 and the positioning holes K, the light-emitting substrate 000 can be accurately assembled into the frame 001a.

[0114] The present application also provides a display device, which can be any product or component with a display function, such as a mobile phone, tablet computer, television, advertising machine, display screen, digital photo frame, or vehicle-mounted terminal. The display device may include the backlight module described in the above embodiment and a liquid crystal display panel located on the light-emitting side of the light-emitting substrate in the backlight module.

[0115] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0116] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0117] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A light-emitting substrate, characterized in that: include: A back plate, comprising: a plurality of spaced-apart strips, and a main body fixedly connected to the same end of the plurality of strips; A plurality of light-emitting units arranged in an array on one side of the back plate; a reflective sheet located on a side of the back panel facing the plurality of light-emitting units, the reflective sheet having a plurality of openings corresponding one-to-one to the plurality of light-emitting units, wherein the orthographic projections of the light-emitting units on the back panel are located within the orthographic projections of the corresponding openings on the back panel; And, the adhesive layer located between the reflective sheet and the back panel, the orthographic projection of the adhesive layer on the back panel is located in the area where the strip portion and / or the main body portion are located, and the orthographic projection of the adhesive layer on the back panel does not overlap with the area between two adjacent strip portions.

2. The light-emitting substrate according to claim 1, wherein The adhesive layer includes: a plurality of adhesive blocks that are separately arranged, and the plurality of adhesive blocks are arranged in an array, and the orthographic projections of some of the plurality of adhesive blocks on the back panel are located in the area where the strip portion is located, and the orthographic projections of another portion of the plurality of adhesive blocks on the back panel are located in the area where the main body portion is located.

3. The light-emitting substrate according to claim 2, wherein: The orthographic projection of the adhesive block on the back plate does not overlap with the orthographic projection of the opening on the back plate.

4. The light-emitting substrate according to claim 2, wherein The plurality of light emitting units are arranged in a plurality of columns along a first direction and in a plurality of rows along a second direction; the plurality of strip portions in the back plate are arranged along the first direction; Wherein, in the second direction, one bonding block is distributed between two adjacent light-emitting units.

5. The light-emitting substrate according to claim 4, characterized in that In the first direction, the distance between two adjacent bonding blocks is greater than or equal to the distance between two adjacent strip portions.

6. The light-emitting substrate according to claim 4, characterized in that A row of the light emitting units arranged along the second direction includes: a plurality of first light emitting units located on the same strip portion, and a plurality of second light emitting units located on the main body portion; There is one bonding block distributed between every two adjacent first light-emitting units, and there is one bonding block distributed between at least two adjacent second light-emitting units among the plurality of second light-emitting units.

7. The light-emitting substrate according to claim 6, wherein: The light-emitting units arranged in a row along the second direction further include: a third light-emitting unit located between the plurality of first light-emitting units and the plurality of second light-emitting units, a portion of the third light-emitting unit being located on the strip portion, and another portion of the third light-emitting unit being located on the main body portion; There is one bonding block distributed between the third light emitting unit and the adjacent first light emitting unit, and there is one bonding block distributed between the third light emitting unit and the adjacent second light emitting unit.

8. The light-emitting substrate according to claim 7, wherein: The bonding block is not provided between at least two adjacent second light emitting units among the plurality of second light emitting units.

9. The light-emitting substrate according to claim 8, wherein All the second light-emitting units distributed on the main body include: an Nth row of second light-emitting units arranged along the first direction, and an N-1th row of second light-emitting units arranged along the first direction and adjacent to the Nth row of second light-emitting units, the N-1th row of second light-emitting units being closer to the plurality of strip-shaped portions than the Nth row of second light-emitting units, and a device arrangement area being defined between the N-1th row of second light-emitting units and the Nth row of second light-emitting units; The light emitting substrate further comprises: a plurality of electronic devices fixed in the device setting area; Wherein, the plurality of bonding blocks are all distributed outside the device setting area.

10. The light emitting substrate according to claim 9, wherein The second light-emitting units in the N-1th row are adjacent to a row of third light-emitting units distributed along the first direction; Among them, there are arranged between the second light emitting units in the N-1th row and the third light emitting units in the row. A row of the bonding blocks is arranged in the first direction.

11. The light emitting substrate according to claim 9, wherein All the second light-emitting units distributed on the main body further include: second light-emitting units in the N+1th row arranged along the first direction, the second light-emitting units in the N+1th row being distributed on a side of the second light-emitting units in the Nth row away from the second light-emitting units in the N-1th row, and being arranged adjacent to the second light-emitting units in the Nth row; Wherein, a row of the bonding blocks arranged along the first direction is distributed between the second light-emitting units in the Nth row and the second light-emitting units in the N+1th row.

12. The light-emitting substrate according to any one of claims 4 to 11, characterized in that: In the first direction, the width of the bonding block is smaller than the width of the strip portion; And / or, the width of the bonding block in the second direction is smaller than the distance between two adjacent openings distributed in the second direction.

13. The light-emitting substrate according to any one of claims 2 to 11, characterized in that: A side of the strip portion where the light emitting unit is provided has a plurality of first silk-screen patterns, and the plurality of first silk-screen patterns correspond one-to-one to the plurality of bonding blocks distributed on the strip portion; The first silk-screen pattern has two first silk-screen lines arranged opposite to each other; The orthographic projection of the bonding block corresponding to the first silk-screen pattern on the back plate has two first boundaries, and the two first silk-screen lines correspond one-to-one to the two first boundaries; Wherein, the maximum distance between the corresponding first silk screen line and the first boundary is less than or equal to a first preset distance.

14. The light-emitting substrate according to any one of claims 2 to 11, characterized in that: A side of the main body where the light emitting unit is provided has a plurality of second silk-screen patterns, and the plurality of second silk-screen patterns correspond one-to-one to the plurality of rows of adhesive blocks distributed on the main body; The second silk-screen pattern has two second silk-screen lines arranged opposite to each other; For any one adhesive block in a row of adhesive blocks corresponding to the second silk-screen pattern, the orthographic projection of the adhesive block on the back plate has two second boundaries, and the two second silk-screen lines correspond one-to-one to the two second boundaries; The maximum distance between the corresponding second silk screen line and the second boundary is less than or equal to at a second preset distance.

15. The light-emitting substrate according to any one of claims 2 to 11, characterized in that: The orthographic projection areas of the adhesive blocks on the back plate are all equal.

16. The light-emitting substrate according to any one of claims 1 to 11, characterized in that: The main body has at least one positioning hole, and the at least one positioning hole is used to cooperate with at least one positioning post provided in the frame for positioning; Wherein, the orthographic projection of the adhesive layer on the back plate does not overlap with the area where the at least one positioning hole is located.

17. A display device, characterized in that: include: The light-emitting substrate according to any one of claims 1 to 16, and a liquid crystal display panel located on the light-emitting side of the light-emitting substrate.

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