Backlight module and display device

Abstract

The invention discloses a backlight module and a display device. The backlight module and the display device aim to solve the problem that a side-in type backlight module is obvious in halo in a single partition. The backlight module comprises a light guide plate; according to the backlight module, an optical film material is arranged on the light emitting face of the light guide plate, and a side light source is arranged on at least one side of the two side faces. The side light source comprises a plurality of lamp sets arranged in the first direction. The light guide plate is provided with at least one light receiving structure on one side of the light emitting face, the light receiving structure extends from one side face to the other side face, and at least part of the end of the light receiving structure is opposite to a gap between the adjacent lamp sets so that the light receiving structure and the lamp sets can define a light emitting partition. The light collecting structures are configured to collect light emitted by the lamp sets in the light emitting subareas to the adjacent light emitting subareas.

Description

Technical Field

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

[0002] In recent years, area light source Mini LED local-dimming has become a hot topic in industry research. In the structural design of Mini LED products, a direct-lit design is adopted to densely arrange blue chips or blue lamp beads on a printed circuit board (PCB) / glass substrate, so as to achieve area dimming in a smaller range. However, due to its high cost, the customer demand is small. To reduce the cost, a multi-zone edge-lit backlight module can be adopted. However, for a multi-zone edge-lit backlight module, there is a problem that the halo in a single zone is relatively obvious. Summary of the Invention

[0003] The present invention provides a backlight module and a display device to improve the problem that the halo in a single zone is relatively obvious in an edge-lit backlight module.

[0004] An embodiment of the present invention provides a backlight module, including: a light guide plate, the light guide plate having a light-emitting surface, and two side surfaces connected to and opposite to the light-emitting surface; the backlight module is provided with an optical film on the light-emitting surface of the light guide plate, and a side light source is provided on at least one of the two side surfaces; the side light source includes: a plurality of lamp groups arranged along a first direction; the extending direction of the connection edge of the side surface and the light-emitting surface is the same as the first direction;

[0005] Wherein, at least one light collecting structure is provided on one side of the light guide plate on the light-emitting surface, the light collecting structure extends from one side surface to the other side surface, and at least part of the end of the light collecting structure is opposite to the gap between adjacent lamp groups, so that the light collecting structure and the lamp groups enclose a light-emitting zone, and the light collecting structure is configured to collect the light emitted by the lamp groups in the light-emitting zone where it is located and directed to the adjacent light-emitting zone.

[0006] In a possible implementation manner, the light guide plate includes: a light guide plate main body; the light collecting structure is a protrusion formed on the side of the light guide plate main body facing the optical film, and in the direction from the light guide plate main body to the optical film, the cross-sectional width of the protrusion gradually becomes smaller in the direction perpendicular to the extending direction.

[0007] In a possible implementation manner, the surface of the light guide plate main body facing the optical film and the surface of the protrusion also have a plurality of first light dots;

[0008] The light guide plate has a first axis, the first axis extends along the first direction and passes through the center of the light-emitting partition; in the direction from the side surface towards the first axis, the density of the first light dots gradually increases.

[0009] In a possible implementation manner, the lamp group includes: a plurality of light-emitting elements arranged along the first direction; in the direction from the main body of the light guide plate towards the optical film, the maximum height of the protrusion is greater than the maximum height of the light-emitting element.

[0010] In a possible implementation manner, the cross-sectional shape of the protrusion in the direction perpendicular to the extending direction includes: a triangle, a trapezoid or a semi-ellipse.

[0011] In a possible implementation manner, the light collection structure is a groove that is recessed from the surface of the light guide plate facing the optical film towards the side away from the optical film, and in the direction from the optical film towards the light guide plate, the cross-sectional width of the groove gradually becomes smaller in the direction perpendicular to the extending direction.

[0012] In a possible implementation manner, the light guide plate further includes a backlight surface opposite to the light-emitting surface; the light guide plate has a set of concave strips recessed towards the light-emitting surface on the backlight surface; the orthographic projection of the set of concave strips on the light-emitting surface overlaps with the groove;

[0013] The set of concave strips includes: a plurality of sub-concave strips arranged along the first direction and extending perpendicular to the first direction; in the same set of concave strips, in the direction along the first direction and from the edge region towards the middle region, the height of the sub-concave strips gradually increases in the direction perpendicular to the light-emitting surface.

[0014] In a possible implementation manner, the sub-concave strips are also filled with white oil.

[0015] In a possible implementation manner, the backlight surface also has a plurality of second light dots;

[0016] The light guide plate has a first axis, the first axis extends along the first direction and passes through the center of the light-emitting partition; in the direction from the side surface towards the first axis, the density of the second light dots gradually increases.

[0017] In a possible implementation manner, the width of the set of concave strips in the first direction is the same as the width of the groove in the first direction; in the direction perpendicular to the light-emitting surface, there is a gap between the groove and the sub-concave strips.

[0018] In a possible implementation manner, the light collection structure satisfies the following relational expression:

[0019] A2≤A1<2A3+A2; wherein A1 represents the maximum width of the light collecting structure in the first direction, A2 represents the maximum width of the gap between adjacent lamp groups in the first direction, and A3 represents the maximum width of the element in the first direction.

[0020] In a possible implementation, the optical film material includes: a diffusion film, a first prism located on a side of the diffusion film away from the light guide plate, and a second prism located on a side of the first prism away from the light guide plate.

[0021] In a possible implementation manner, the backlight module further includes: a color conversion film located between the optical film material and the light guide plate.

[0022] In a possible implementation manner, the material of the light guide plate includes: polycarbonate; and the light guide plate is reused as a backplane.

[0023] An embodiment of the present invention further provides a display device, comprising the backlight module provided by the embodiment of the present invention.

[0024] The beneficial effects of the embodiments of the present invention are as follows: In the embodiments of the present invention, by providing at least one light-collecting structure on one side of the light-emitting surface of the light guide plate, the end of the light-collecting structure is opposite to the gap between the adjacent lamp groups, that is, the light-collecting structure is made on the light-emitting surface of the light guide plate and located at the boundary of the light-emitting partition F, it is possible to gather the light emitted from the lamp group in the light-emitting partition to the adjacent light-emitting partition, that is, by designing the light-collecting structure to block the light from the lit light-emitting partition from emitting to the adjacent light-emitting partition, the halo problem can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 One of the side views of the display device provided by the embodiment of the present invention;

[0026] Figure 2 One of the top view schematic diagrams of the light guide plate and the side light source provided by the embodiment of the present invention;

[0027] Figure 3 A second schematic top view of a light guide plate and a side light source provided by an embodiment of the present invention;

[0028] Figure 4 One of the cross-sectional schematic diagrams of the protrusion provided by the embodiment of the present invention;

[0029] Figure 5 A second cross-sectional schematic diagram of a protrusion provided in an embodiment of the present invention;

[0030] Figure 6 A second side view of the display device provided by the embodiment of the present invention;

[0031] Figure 7The third top view schematic diagram of the light guide plate and the side light source provided by the embodiment of the present invention;

[0032] Figure 8 The first cross-sectional schematic diagram of the sub-concave strip provided by the embodiment of the present invention;

[0033] Figure 9 The second cross-sectional schematic diagram of the sub-concave strip provided by the embodiment of the present invention;

[0034] Figure 10 For forming Figure 1 The process schematic diagram of the shown light guide plate;

[0035] Figure 11 For forming Figure 6 The process schematic diagram of the shown light guide plate. Specific embodiments

[0036] In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0037] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meaning as understood by those of ordinary skill in the art to which the present disclosure pertains. The "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or items appearing before this term cover the elements or items listed after this term and their equivalents, without excluding other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0038] As used herein, "about" or "substantially the same" includes the stated value and means within an acceptable deviation range for the specific value as determined by those of ordinary skill in the art considering the measurements discussed and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "substantially the same" may mean that the difference from the stated value is within one or more standard deviation ranges, or within ±30%, 20%, 10%, 5% ranges.

[0039] In the drawings, for clarity, the thicknesses of layers, films, panels, regions, etc. are enlarged. Exemplary embodiments are described herein with reference to cross-sectional views that are schematic illustrations of idealized embodiments. Thus, deviations from the shapes of the figures are to be expected as a result of, for example, manufacturing techniques and / or tolerances. Accordingly, the embodiments described herein should not be construed as limited to the specific shapes of the regions shown herein, but rather include deviations in shape resulting from, for example, manufacturing. For example, regions illustrated or described as flat may typically have rough and / or non-linear features. Additionally, the sharp corners shown may be rounded. Thus, the regions shown in the figures are schematic in nature, and their shapes are not intended to illustrate the exact shape of the regions and are not intended to limit the scope of the claims.

[0040] To keep the following description of the embodiments of the present disclosure clear and concise, detailed descriptions of known functions and known components are omitted from the present disclosure.

[0041] See Figure 1 、 Figure 2 As shown, an embodiment of the present invention provides a backlight module, including: a light guide plate 11, the light guide plate 11 having a light-emitting surface S1, and two side surfaces S2 that are connected to and opposite to the light-emitting surface S1; an optical film 12 is provided on the light-emitting surface of the light guide plate 11 in the backlight module, and a side light source 13 is provided on at least one of the two side surfaces S2; optionally, for example, in combination Figure 2 As shown, side light sources 13 can be provided on both side surfaces S2; the side light source 13 includes: a plurality of lamp groups 130 arranged along a first direction X; the lamp group 130 includes: a plurality of light-emitting elements 1300 arranged along the first direction X; the extending direction of the connecting edge between the side surface S2 and the light-emitting surface S1 is the same as the first direction X; for example, in combination Figure 2 As shown, the connecting edge between the side surface S2 and the light-emitting surface S1 is the upper or lower side of the light guide plate 11, and the first direction X is the same as the extending direction of the upper or lower side of the light guide plate 11, that is, a plurality of lamp groups 130 are arranged in sequence along the upper and / or lower sides of the light guide plate 11;

[0042] Wherein, at least one light-gathering structure V is provided on one side of the light guide plate 11 at the light-emitting surface S1, and the light-gathering structure V extends from one side surface S2 to the other side surface S2, for example, from Figure 2 the side surface S2 above the light guide plate 11 in, to the side surface S2 below, and at least a part of the end of the light-gathering structure 11 is opposite to the gap between adjacent lamp groups 130, so that the light-gathering structure V and the lamp group 130 enclose a light-emitting partition F, and the light-gathering structure V is configured to gather the light emitted by the lamp group 130 in the light-emitting partition F where it is located and directed to an adjacent light-emitting partition F, for example, in combination Figure 2As shown, the lamp group 130 and the light collection structure V together enclose 6 light-emitting zones F. Among them, the second light collection structure V from the left can collect the light emitted by the lamp group 130 in the first light-emitting zone F from the left (that is, a total of 6 light-emitting elements 1300 in the upper and lower two lamp groups on the far left) and directed towards the second light-emitting zone F from the left.

[0043] In the related art, when light rays are incident on the light guide plate, the line light source is converted into a surface light source because total internal reflection and diffuse reflection occur during the transmission process. Total internal reflection is to make the most efficient use of the light energy incident on the light guide plate, and diffuse reflection is to break up the line light source into a surface light source; for a side-entry multi-zone backlight module, when a single lamp group in a light-emitting zone (such as 6 LEDs) is turned on, total internal reflection occurs inside the light guide plate, causing the light rays to exit from the light guide plate to the light guide plate. The light spots in the adjacent light-emitting zones (such as the left and right light-emitting zones in Figure 2 In the embodiments of the present invention, at least one light collection structure V is provided on one side of the light guide plate 11 at the light-emitting surface S1. The end of the light collection structure V is opposite to the gap between the adjacent lamp groups 130, that is, a light collection structure V is made at the light-emitting surface S1 of the light guide plate 11 and located at the boundary of the light-emitting zone F, so as to collect the light emitted by the lamp group 130 in the light-emitting zone F and directed towards the adjacent light-emitting zone F. That is, by designing the light collection structure V to block the light rays of the lit light-emitting zone from exiting to the adjacent light-emitting zone, the halo problem can be improved.

[0044] Combined with Figure 2 As shown, for the internal area of the light guide plate 11, a light collection structure V can be provided at a position corresponding to the gap between two adjacent lamp groups 130. For the edge area of the light guide plate 11, a light collection structure V can also be provided at the area closest to the edge of the lamp group 130. For example, for Figure 2 As shown, light collection structures V can also be provided in the leftmost area and the rightmost area of the light guide plate 11.

[0045] In a possible implementation manner, combined with Figure 1 、 Figure 2 As shown, the light guide plate 11 includes: a light guide plate main body 110; the light collection structure V is a protrusion V1 formed by the light guide plate main body 110 towards the side of the optical film. And in the direction from the light guide plate main body 110 to the optical film 12, the cross-sectional width b of the protrusion V1 gradually becomes smaller in the direction perpendicular to the extension direction. In the embodiments of the present invention, by using the protrusion V formed by the light guide plate main body 110 towards the side of the optical film as the light collection structure V, and the cross-sectional width b of the protrusion V1 gradually becomes smaller in the direction perpendicular to the extension direction, a light collection effect similar to a triangular prism is formed, thereby improving the halo problem.

[0046] Optionally, the light guide plate body 110 and the protrusion V1 may be integrally formed. The protrusion V1 may be formed by thinning a conventional light guide plate. Without affecting the display screen, the light guide plate provided in the embodiments of the present invention can replace the back plate in a conventional backlight module.

[0047] In a possible implementation, as shown in Figure 2 , the side light source 13 may be disposed on the light guide plate 11. Specifically, for example, the light guide plate 11 may be provided with a step around the side surface S2. The side light source 13 may be located at the step. For example, a part of the light guide plate body 110 around the side surface S2 may be used as the step, and the side light source 13 may be located at the periphery of the light guide plate 110 on the side surface S2; in another possible implementation, as shown in Figure 3 , the side light source 13 may also be independently disposed in an area outside the light guide plate 11. For example, it is fixed to a circuit board and may have a gap from the light guide plate 11.

[0048] In a possible implementation, as shown in Figure 1 and Figure 2 , the surface of the light guide plate body 110 facing the optical film 12 and the surface of the protrusion V1 also have a plurality of first light dots 15; the light guide plate 11 has a first axis k1, and the first axis k1 extends along the first direction X and passes through the center O of the light emitting area F; in the direction from the side surface S1 to the first axis k1 (as shown by the arrow c in Figure 1 ), the density of the first light dots 15 gradually increases. In the embodiments of the present invention, the surface of the light guide plate body 110 facing the optical film 12 and the surface of the protrusion V1 also have a plurality of first light dots 15, which can scatter the line light source emitted by the lamp group 130 through the first light dots 15 to form a surface light source, improving the problem that the line light source has poor uniformity and affects the display of the screen, and for example, the problem that the blue light intensity distribution of the lamp group 13 emitted in a single light emitting area F is uneven, resulting in serious color deviation after the color conversion material is excited; moreover, in the direction from the side surface S2 to the first axis k1 (as shown by the arrow c in Figure 2 ), the density of the first light dots 15 gradually increases, which can improve the problem that the light intensity becomes weaker as the distance from the light emitting element 1300 increases, resulting in poor brightness uniformity.

[0049] In the embodiments of the present invention, when the light emitted by the lamp group 130 in a single light emitting area F exits to the light collecting structure V, the light rays originally emitted in all directions are reflected and collected in the single light emitting area F. Then, after the line light source is scattered into a surface light source by the first light dots 15 in the single light emitting area F, it exits to the optical film 12 on the side of the light emitting surface S1, and finally a display pattern is formed on the display panel.

[0050] In a possible implementation, the first light spot 15 can be raised particles formed on the surface of the light guide plate 11 or pits formed on the surface of the light guide plate 11. It can be fabricated by using a knockout pin in the light guide plate mold or by precision etching for one-piece molding.

[0051] In a possible implementation, as shown in Figure 1 the maximum height d1 of the protrusion V1 is greater than the maximum height d2 of the light-emitting element 1300 in the direction from the light guide plate main body 110 towards the optical film 12.

[0052] In a possible implementation, as shown in Figure 1 and Figure 2 in the direction from the light guide plate main body 110 towards the optical film 12, that is, in the direction perpendicular to the light-emitting surface S1, the maximum height d1 range of the protrusion V1 can be 0.2 mm to 0.8 mm. For example, it can be 0.3 mm to 0.7 mm. For example, it can be 0.4 mm to 0.6 mm. For example, it can be 0.5 mm, 0.5 mm, or 0.6 mm; the maximum width A1 range of the protrusion V1 in the first direction X can be 0.3 mm to 0.6 mm. For example, it can be 0.4 mm to 0.5 mm. For example, it can be 0.45 mm to 0.5 mm. For example, it can be 0.45 mm, 0.46 mm, 0.47 mm, 0.48 mm, 0.49 mm, or 0.5 mm.

[0053] In a possible implementation, as shown in Figure 1 and Figure 2 in the direction perpendicular to the light-emitting surface S1, the thickness d3 of the light guide plate main body 110 can be the same as the maximum height d1 of the protrusion V1. The height of the protrusion V1 needs to be controlled within the range of subtracting the total thickness of the light guide plate to maximize the utilization of light energy.

[0054] In a possible implementation, the cross-sectional shape of the protrusion V1 in the direction perpendicular to the extension direction can be triangular. For example, as shown in Figure 1 ; or, for another example, the cross-sectional shape of the protrusion V1 in the direction perpendicular to the extension direction can be trapezoidal, as shown in Figure 4 ; or, for another example, the cross-sectional shape of the protrusion V1 in the direction perpendicular to the extension direction can be semi-elliptical, as shown in Figure 5 .

[0055] In a possible implementation, for Figure 1 shown, when forming the protrusion V1 on the light-emitting surface S1 of the light guide plate 11 as the light-collecting structure V, Figure 10The process shown forms the light guide plate 11. That is, the light guide plate mold and dot pattern can be designed and fabricated first. After that, the light guide plate is injection-molded. Then, the gate of the light guide plate is cut and polished, thus completing the production of the light guide plate.

[0056] In a possible implementation, in combination with Figure 6 、 Figure 7 As shown, the light collection structure V is a groove V2 that is recessed from the surface of the light guide plate 11 facing the optical film 12 toward the side away from the optical film 12. And in the direction from the optical film 12 pointing to the light guide plate 11, the cross-sectional width of the groove V2 gradually becomes smaller in the direction perpendicular to the extension direction. In the embodiment of the present invention, by making a hollow groove V2 on the light-emitting surface S1 of the light guide plate 11 and at the boundary of the light-emitting partition F as the light collection structure V (when the light inside the light guide plate 11 reaches the groove V2, it changes from an optically dense medium to an optically sparse medium, and the outgoing light angle becomes larger, achieving the effect of single-zone light collection), the halo problem is improved.

[0057] In a possible implementation, in combination with Figure 1 、 Figure 2 As shown, in the direction perpendicular to the light-emitting surface S1, the maximum depth range of the groove V2 can be 0.1 mm to 0.3 mm. For example, it can be 0.1 mm, 0.2 mm, or 0.3 mm; the maximum width range of the groove V2 in the first direction X can be 0.2 mm to 0.5 mm. For example, it can be 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm.

[0058] In a possible implementation, in combination with Figure 6 As shown, the light guide plate 11 further includes a backlight surface S2 opposite to the light-emitting surface S1; the light guide plate 11 has a set of concave strips V3 that are recessed toward the light-emitting surface S1 on the backlight surface S3; the orthographic projection of the set of concave strips V3 on the light-emitting surface S3 overlaps with the groove V2; the set of concave strips V3 includes: a plurality of sub-concave strips V30 arranged along the first direction X and extending perpendicular to the first direction X, and the extension length of the sub-concave strips V30 can be the same as the extension direction of the groove V2; in the same set of concave strips V3, in the direction along the first direction X and from the edge region to the middle region, the height of the sub-concave strips V30 in the direction perpendicular to the light-emitting surface gradually increases. For example, in combination with Figure 6 As shown, for the fourth set of concave strips V3 from the left, the height e1 of the sub-concave strip V30 at the outermost edge is less than the height e3 of the sub-concave strip V30 in the middle region. The sub-concave strips V30 are also filled with white oil 14.

[0059] In an embodiment of the present invention, on one side of the light guide plate 11 at the backlight surface S3, a concave strip group V3 is further provided at the boundary of the light-emitting partition F. The concave strip group V3 includes a plurality of sub-concave strips V30. In the same concave strip group V3, in the direction along the first direction X and pointing from the edge region to the middle region, the height of the sub-concave strip V30 gradually increases in the direction perpendicular to the light-emitting surface. The sub-concave strip V30 is also filled with white oil 14. In this way, when the light inside the light guide plate 11 exits through the sub-concave strip V30 on the backlight surface S3, it can be reflected by the white oil with a high reflectivity. On the one hand, it can prevent the internal light of the light guide plate 11 from exiting from the backlight surface S3 to the adjacent light-emitting partition F in the area where a single light-emitting partition F is located. On the other hand, it can effectively improve the brightness of a single light-emitting partition F and enhance the contrast. Moreover, the sub-concave strips V30 with gradually changing height can prevent bright lines from appearing due to large changes in brightness and improve the uniformity of the display screen.

[0060] In a possible implementation manner, referring to Figure 6 , Figure 7 as shown, the backlight surface S3 further has a plurality of second light dots 16. The light guide plate 11 has a first axis k1, and the first axis k1 extends along the first direction X and passes through the center O of the light-emitting partition F. In the direction from the side surface S2 to the first axis k1, the density of the second light dots 16 gradually increases. In an embodiment of the present invention, the backlight surface S3 of the light guide plate 11 further has a plurality of second light dots 16, which can scatter the line light source emitted by the lamp group 130 through the second light dots 16 to form a surface light source, improving the problem that the poor uniformity of the line light source affects the display of the picture. Moreover, in the direction from the side surface S2 to the first axis k1 (as shown by the arrow c in Figure 7 ), the density of the second light dots 16 gradually increases, which can improve the problem that the light intensity becomes weaker as the distance from the light-emitting element 1300 increases, resulting in poor brightness uniformity.

[0061] In a possible implementation manner, referring to Figure 6 , Figure 7 as shown, the width f1 of the concave strip group V3 in the first direction X is the same as the width f2 of the groove V2 in the first direction. In the direction perpendicular to the light-emitting surface S1, there is a gap between the groove V2 and the sub-concave strip V30, that is, the groove V2 and the sub-concave strip V30 are not connected.

[0062] In a possible implementation manner, the cross-sectional shape of the groove V2 in the direction perpendicular to the extending direction can be an inverted triangle, an inverted trapezoid, or an inverted semi-elliptical shape. In a possible implementation manner, the cross-sectional shape of the sub-concave strip V30 in the direction perpendicular to the extending direction can be a triangle, as shown in Figure 6 ; in another possible implementation manner, the cross-sectional shape of the sub-concave strip V30 in the direction perpendicular to the extending direction can be a trapezoid, as shown in Figure 8As shown; in another possible implementation, the cross-sectional shape of the sub-recessed strip V30 in the direction perpendicular to the extension direction may be semi-elliptical, as Figure 9 shown.

[0063] In a possible implementation, for Figure 6 shown, when forming the groove V2 on the light-emitting surface S1 of the light guide plate 11 as the light-gathering structure V and forming the recessed strip group V3 on the backlight surface S3, the light guide plate 11 can be formed by using the Figure 11 shown process, that is, the light guide plate mold and dot pattern can be designed and manufactured first, and then the light guide plate is injection-molded. After that, a high-reflection white oil is printed on the backlight surface gradient microstructure (recessed strip group V3) of the light guide plate and thermoset. Then, the gate of the light guide plate is cut and polished, thus completing the production of the light guide plate.

[0064] In a possible implementation, referring to Figure 1 、 Figure 6 shown, the light-gathering structure V satisfies the following relational expression:

[0065] A2 ≤ A1 < 2A3 + A2; where A1 represents the maximum width of the light-gathering structure V in the first direction X, A2 represents the maximum width of the gap between adjacent lamp groups 130 in the first direction X, and A3 represents the maximum width of the component in the first direction X. That is, the maximum width A1 of the light-gathering structure V in the first direction X can be greater than or equal to the maximum width A2 of the gap between adjacent lamp groups 130 in the first direction X to effectively gather the light emitted by the lamp groups 130 in the current light-emitting partition F; while the maximum width A1 of the light-gathering structure V in the first direction X is less than the sum of the widths of two light-emitting components 1300 and the gap width, which can avoid excessive influence of the light-gathering structure V on the uniform light emission of the light guide plate 11.

[0066] In a possible implementation, the maximum width A1 of the light-gathering structure V in the first direction X can be equal to the maximum width A2 of the gap between adjacent lamp groups 130 in the first direction X. In this way, while effectively gathering the light in the current light-emitting partition F, it can also avoid blocking the light emitted by the light-emitting components 1300.

[0067] In a possible implementation, in combination with Figure 1 or Figure 6 shown, the optical film 12 includes: a diffusion film 121, a first prism 122 located on the side of the diffusion film 121 away from the light guide plate 11, and a second prism 123 located on the side of the first prism 122 away from the light guide plate 11.

[0068] In a possible implementation, in combination with Figure 1 or Figure 6As shown, the backlight module 100 further includes a color conversion film 13 located between the optical film material 12 and the light guide plate 11.

[0069] In a possible implementation manner, in combination with Figure 1 or Figure 6 As shown, the material of the light guide plate 11 includes: polycarbonate; the light guide plate 11 is reused as a backplane. Optionally, the haze of the light guide plate can be 96% or more. Polycarbonate (PC) is an amorphous, odorless, non-toxic, highly transparent colorless or slightly yellow thermoplastic engineering plastic, which has better strength and toughness, as well as better heat resistance, electrical insulation, and weather resistance. The impact resistance of PC is several times that of general thermoplastic plastics, and it is known as "transparent metal", and its tensile and bending resistance are also very prominent; the heat distortion temperature of PC is about 135 °C, and it can maintain stable physical and mechanical properties within a relatively wide temperature range; PC has good electrical insulation properties and is suitable for the production of electrical components and wires and cables; PC has strong resistance to ultraviolet rays and climate change and is not easy to discolor or embrittle.

[0070] The backlight module provided by the embodiments of the present invention can be applied to display products with different sizes, multiple partitions, low cost, and high color gamut. Optionally, the light-emitting element 1300 can be a white light or blue light source (specifically, it can be used in combination with the color conversion film). Optionally, the material for high-color-gamut color conversion can also be encapsulated inside the light-emitting element (with relatively high reliability requirements), or it can exist alone as a color conversion film material, such as in the embodiments of the present invention Figure 1 as shown;

[0071] Based on the same inventive concept, the embodiments of the present invention also provide a display device. In combination with Figure 1 or Figure 6 as shown, the display device includes the backlight module 100 provided by the embodiments of the present invention, and may further include a liquid crystal cell 200 located on the light-emitting side of the backlight module.

[0072] In specific implementation, in the embodiments of the present disclosure, the display device can be: any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc. Other essential components of the display device should be understood by those of ordinary skill in the art and will not be elaborated here, nor should it be regarded as a limitation to the present disclosure.

[0073] Although the preferred embodiments of the present disclosure have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted to include the preferred embodiments as well as all changes and modifications falling within the scope of the present disclosure.

[0074] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A backlight module, characterized in that: include: A light guide plate, the light guide plate having a light emitting surface and two side surfaces connected to the light emitting surface and arranged opposite to each other; The backlight module is provided with an optical film material on the light emitting surface of the light guide plate, and a side light source is provided on at least one of the two side surfaces; the side light source comprises: a plurality of lamp groups arranged along a first direction; the extending direction of the connecting edge of the side surface and the light emitting surface is the same as the first direction; Wherein, the light guide plate is provided with at least one light collecting structure on one side of the light emitting surface, the light collecting structure extends from one of the side surfaces to the other side surface, and at least part of the end of the light collecting structure is opposite to the gap between the adjacent light groups, so that the light collecting structure and the light groups form a light-emitting partition, and the light collecting structure is configured to collect the light emitted by the light group in the light-emitting partition to the adjacent light-emitting partition.

2. The backlight module according to claim 1, characterized in that: The light guide plate includes: a light guide plate body; the light collecting structure is a protrusion formed by the light guide plate body toward the optical film material, and in the direction from the light guide plate body to the optical film material, the cross-sectional width of the protrusion perpendicular to the extension direction gradually decreases.

3. The backlight module according to claim 2, characterized in that: The surface of the light guide plate body facing the optical film material and the surface of the protrusion also have a plurality of first dots; The light guide plate has a first axis, which extends along the first direction and passes through the center of the light-emitting partition; in the direction from the side to the first axis, the density of the first dots gradually increases.

4. The backlight module according to claim 2, wherein: The lamp group includes: a plurality of light emitting elements arranged along the first direction; in the direction from the light guide plate body toward the optical film material, the maximum height of the protrusion is greater than the maximum height of the light emitting element.

5. The backlight module according to claim 2, characterized in that: The cross-sectional shape of the protrusion perpendicular to the extension direction includes: triangle, trapezoid or semi-ellipse.

6. The backlight module according to claim 1, wherein: The light collecting structure is a groove which is recessed from the surface of the light guide plate toward the optical film and away from the optical film, and the cross-sectional width of the groove in the direction perpendicular to the extension direction gradually decreases in the direction from the optical film to the light guide plate.

7. The backlight module according to claim 6, wherein: The light guide plate further comprises a backlight surface opposite to the light emitting surface; the light guide plate comprises a concave stripe group on the backlight surface which is concave toward the light emitting surface; the orthographic projection of the concave stripe group on the light emitting surface overlaps with the groove; The groove group includes: a plurality of sub-grooves arranged along the first direction and extending perpendicularly to the first direction; in the same groove group, in the direction along the first direction and from the edge area to the middle area, the height of the sub-grooves in the direction perpendicular to the light emitting surface gradually increases.

8. The backlight module according to claim 7, characterized in that: The sub-concave strips are also filled with white oil.

9. The backlight module according to claim 8, characterized in that: The backlight surface also has a plurality of second mesh points; The light guide plate has a first axis, which extends along the first direction and passes through the center of the light-emitting partition; in the direction from the side to the first axis, the density of the second grid points gradually increases.

10. The backlight module according to claim 7, wherein: The width of the concave strip group in the first direction is the same as the width of the groove in the first direction; in a direction perpendicular to the light emitting surface, the groove is spaced apart from the sub-concave strip.

11. The backlight module according to claim 1, wherein: The light collecting structure satisfies the following relationship: A2≤A1<2A3+A2; wherein A1 represents the maximum width of the light collecting structure in the first direction, A2 represents the maximum width of the gap between adjacent lamp groups in the first direction, and A3 represents the maximum width of the element in the first direction.

12. The backlight module according to claim 1, wherein: The optical film material includes: a diffusion film, a first prism located on a side of the diffusion film away from the light guide plate, and a second prism located on a side of the first prism away from the light guide plate.

13. The backlight module according to claim 12, wherein: The backlight module further includes a color conversion film located between the optical film material and the light guide plate.

14. The backlight module according to claim 1, wherein: The material of the light guide plate includes: polycarbonate; the light guide plate is reused as a back plate.

15. A display device, characterized in that: The backlight module comprises the backlight module described in any one of claims 1 to 14.

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