Backlight module and display device

Abstract

The utility model provides a backlight module and a display device, and the backlight module comprises a backboard assembly which is provided with a chute part; the diffusion plate and the back plate assembly are arranged at an interval; the diffusion plate is provided with a first side face facing the back plate assembly, and a clamping structure is arranged on the first side face in a protruding mode. The clamping structure is clamped into the sliding groove part, and the clamping structure can move in the sliding groove part in the direction parallel to the first side face. The technical problem that the diffusion plate moves when the temperature changes and is easily scratched by the supporting columns is solved.

Description

Technical Field

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

[0002] The backlight module provides a backlight source for a direct-lit display device. In order to improve the uniformity of illumination, the backlight module has a diffuser. The diffuser is supported on the backplane assembly by support columns. The diffuser moves when the temperature changes and is easily scratched by the support columns, which in turn affects the display effect of the display device. Utility Model Content

[0003] The present application provides a backlight module and a display device, aiming to solve the technical problem that a diffusion plate moves when the temperature changes and is easily scratched by a support column.

[0004] In a first aspect, the present application proposes a backlight module, comprising:

[0005] A back plate assembly, wherein the back plate assembly is provided with a slide groove portion;

[0006] A diffuser plate, the diffuser plate is spaced apart from the back plate assembly; the diffuser plate has a first side surface facing the back plate assembly, a clamping structure is convexly provided on the first side surface; the clamping structure is clamped into the slide groove portion, and the clamping structure is movable in the slide groove portion in a direction parallel to the first side surface.

[0007] Optionally, the slide groove portion limits the movement of the clamping structure in a direction perpendicular to the first side surface.

[0008] Optionally, the slide groove portion has a notch arranged toward the diffuser plate and a groove formed by being recessed from the notch toward the diffuser plate;

[0009] The clamping structure is clamped into the groove through the notch; the width of the notch is smaller than the width of the groove, so as to limit the movement of the clamping structure in a direction perpendicular to the first side surface.

[0010] Optionally, the diffuser plate has a center, and the diffuser plate has a ray passing through the center and parallel to the first side surface;

[0011] The slide groove portion has an extending direction parallel to the first side surface, and the extending direction is parallel to the ray.

[0012] Optionally, there are multiple slide grooves and multiple clamping structures; the clamping structures are inserted into the corresponding slide grooves one by one; and the projection of the intersection of the extension lines of the multiple slide grooves on the diffuser coincides with the center.

[0013] Optionally, the diffuser plate has a support column, the support column is fixed on the first side surface and extends toward the back plate assembly; the clamping structure is arranged at an end of the support column away from the first side surface.

[0014] Optionally, the back plate assembly includes a back plate and a slide rail; the back plate is spaced apart from the diffuser plate, and the slide rail is disposed on a side of the back plate facing the diffuser plate;

[0015] The slide rail is configured with the slide groove portion.

[0016] Optionally, the slide rail includes a bracket, and the bracket is arranged on the back plate; the slide groove portion is arranged on the bracket.

[0017] Optionally, the holding structure is integrally injection-molded on the diffuser plate or secondary injection-molded on the diffuser plate.

[0018] In a second aspect, the present application further proposes a display device, comprising the backlight module as described above.

[0019] In the technical solution of the embodiment of the present application, a holding structure is protruded on the first side surface of the diffuser plate facing the back panel assembly, and the holding structure is inserted into the slide groove portion of the back panel assembly, and the holding structure is allowed to move in the slide groove portion in a direction parallel to the first side surface; since the holding structure is protruded on the first side surface of the diffuser plate, the support for the diffuser plate is ensured while the freedom of the diffuser plate during thermal expansion or contraction is ensured, thereby avoiding damage to the diffuser plate caused by the support member, and thus helping to improve the display quality of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a cross-sectional schematic diagram of a backlight module provided in an embodiment of the present application;

[0022] Figure 2 yes Figure 1 A partial enlarged view of the middle part;

[0023] Figure 3 is another cross-sectional schematic diagram of the backlight module provided in an embodiment of the present application;

[0024] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0025] Figure 5 is a schematic structural diagram of a diffusion plate of a backlight module provided in an embodiment of the present application;

[0026] Figure 6 yes Figure 5 A partial enlarged view of point C in the middle;

[0027] Figure 7 is a schematic structural diagram of a back panel assembly of a backlight module provided in an embodiment of the present application;

[0028] Figure 8 yes Figure 7 A partial enlarged view of point D in the middle.

[0029] Reference numerals list

[0030] 10 Backlight module 220 Back Plate 100 Diffuser Plate 211 Chute 200 Backplane components 212 Bracket 110 Holder structure 211a Opening 120 Support column 211b Grooves S1 First side O center 210 Slide rails L ray DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present utility model.

[0032] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description". Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. In order to enable any technician in the field to implement and use the utility model, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the utility model can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the utility model with unnecessary details. Therefore, the utility model is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0034] Combination Figure 1 and Figure 2 As shown, the embodiment of the present application provides a backlight module 10, comprising:

[0035] A back plate assembly 200, wherein the back plate assembly 200 is provided with a slide groove portion 211;

[0036] A diffuser plate 100, wherein the diffuser plate 100 is spaced apart from the back plate assembly 200; the diffuser plate 100 has a first side surface S1 facing the back plate assembly 200, and a clamping structure 110 is protruded from the first side surface S1; the clamping structure 110 is clamped into the slide groove portion 211, and the clamping structure 110 is movable in the slide groove portion 211 in a direction parallel to the first side surface S1.

[0037] In the technical solution of the embodiment of the present application, Figure 3 and Figure 4 As shown, by protruding a holding structure 110 on the first side surface S1 of the diffuser 100 facing the back panel assembly 200, the holding structure 110 is inserted into the slide groove portion 211 of the back panel assembly 200, and the holding structure 110 is allowed to move in the slide groove portion 211 along a direction parallel to the first side surface S1; since the holding structure 110 is protruding on the first side surface S1 of the diffuser 100, the support for the diffuser 100 is ensured while the freedom of the diffuser 100 during thermal expansion or contraction is ensured, thereby avoiding damage to the diffuser 100 caused by setting a support member, thereby helping to improve the display quality of the display device.

[0038] It should be noted that in the technical solution of the embodiment of the present application, the back panel assembly 200 at least includes a back panel 220 and a light panel. The slide groove portion 211 can be arranged on the back panel 220 or on the light panel.

[0039] In the technical solution of the embodiment of the present application, the diffuser 100 has a first side surface S1 and a second side surface arranged opposite to each other, wherein the first side surface S1 is arranged facing the back panel assembly 200 and serves as the light incident surface of the diffuser 100 , and the second side surface is the light emitting surface of the diffuser 100 .

[0040] As an optional implementation of the above embodiment, Figure 3 and Figure 4 As shown, the slide groove portion 211 limits the movement of the clamping structure 110 in a direction perpendicular to the first side surface S1. In an embodiment, the slide groove portion 211 is configured to allow the clamping structure 110 to move in a direction parallel to the first side surface S1 while limiting the movement of the clamping structure 110 in a direction perpendicular to the first side surface S1, thereby preventing the diffuser 100 from bouncing in the spacing direction between the diffuser 100 and the back plate assembly 200.

[0041] In a specific embodiment, the direction perpendicular to the first side surface S1 is the thickness direction of the backlight module 10, and the direction parallel to the first side surface S1 is the length direction and the width direction of the backlight module 10; that is, in the embodiment, the freedom of the diffuser plate 100 in the thickness direction is restricted to prevent it from jumping in the thickness direction; and the diffuser plate 100 can move in the length direction or the width direction when the temperature changes, ensuring that the diffuser plate 100 has freedom during thermal expansion or contraction.

[0042] As an optional implementation of the above embodiment, Figure 1 As shown, the slide groove portion 211 has a notch 211a arranged toward the diffuser 100 and a groove 211b formed by being recessed from the notch 211a and facing away from the diffuser 100; the clamping structure 110 is an elastic member; the clamping structure 110 is clamped into the groove 211b through the notch 211a; the width of the notch 211a is smaller than the width of the groove 211b, so as to limit the movement of the clamping structure 110 in a direction perpendicular to the first side surface S1. During assembly, when the clamping structure 110 passes through the notch 211a, it is deformed and passes through the notch 211a, and recovers after entering the groove 211b. Then, after the clamping structure 110 is clamped into the groove 211b, since the width of the notch 211a is smaller than the width of the groove 211b, the movement of the clamping structure 110 in a direction perpendicular to the first side surface S1 is limited.

[0043] In an embodiment, the cross-sectional shape of the holding structure 110 may be circular, and the cross-sectional shape of the groove 211b may be circular to match the holding structure 110. For another example, the cross-sectional shape of the holding structure 110 may be square, and the cross-sectional shape of the groove 211b may be square to match the holding structure 110.

[0044] As an optional implementation of the above embodiment, Figure 5 As shown, the diffuser 100 has a center O, and the diffuser 100 has a ray L passing through the center O and parallel to the first side surface S1; the slide groove portion 211 has an extension direction parallel to the first side surface S1, and the extension direction is parallel to the ray L. In this way, the slide groove portion 211 defines that the movement trajectory of the diffuser 100 during thermal expansion or contraction passes through the center O of the diffuser 100 when projected onto the diffuser 100, so that the diffuser 100 is uniformly thermally expanded or uniformly contracted. That is, the contraction or thermal expansion of the diffuser 100 is radial contraction toward the center O or radial expansion toward the center O.

[0045] In the embodiment, the center O of the diffuser plate 100 can be understood as the geometric center O or the center of gravity of the first side surface S1. In some embodiments, the diffuser plate 100 is square, and the center O of the diffuser plate 100 is the intersection of its diagonal lines. The extension line of the projection of the chute portion 211 on the first side surface S1 of the diffuser plate 100 passes through the center O of the diffuser plate 100.

[0046] As an optional implementation of the above embodiment, Figure 6 and Figure 7 As shown, the number of the slide grooves 211 is multiple, and the number of the clamping structures 110 is multiple; the clamping structures 110 are clamped into the corresponding slide grooves 211 one by one. That is, in the embodiment, combined with Figure 5 and Figure 7 As shown, the projection of the intersection of the extension lines of the plurality of slide grooves 211 on the diffuser 100 coincides with the center O. When the diffuser 100 expands due to heat or contracts due to cold, the diffuser 100 radially expands or radially contracts outward from the center O based on the plurality of kinematic pairs formed by the plurality of holding structures 110 and the plurality of slide grooves 211, so that each expansion or contraction in the direction parallel to the first side surface S1 has a degree of freedom.

[0047] For example, Figure 7 As shown, the layout of the chute portion 211 is a "M"-shaped layout. In some embodiments, the layout of the chute portion 211 can also be a "X"-shaped layout.

[0048] Furthermore, a plurality of holding structures 110 are provided to be slidably connected to the corresponding sliding grooves 211 , respectively, so that the connection strength between the diffuser plate 100 and the back plate assembly 200 is enhanced.

[0049] As an optional implementation of the above embodiment, Figure 6As shown, the diffuser 100 has a support column 120, which is fixed on the first side surface S1 and extends toward the back plate assembly 200; the clamping structure 110 is arranged at one end of the support column 120 away from the first side surface S1. In some embodiments, the support column 120 is generally formed integrally with the diffuser 100, that is, the support column 120 is a part of the structure of the diffuser 100, and the connection between the clamping structure 110 on the support column 120 and the slide groove portion 211 enables the diffuser 100 and the back plate assembly 200 to be slidably connected. The support column 120 is fixed on the first side surface S1 and extends toward the back plate assembly 200 to determine the light mixing distance between the back plate assembly 200 and the diffuser 100; and the clamping structure 110 is arranged at one end of the support column 120 away from the first side surface S1, thereby avoiding damage to the diffuser 100 while ensuring the light mixing distance between the back plate assembly 200 and the diffuser.

[0050] As an optional implementation of the above embodiment, Figure 2 , Figure 4 and Figure 8 As shown, the back plate assembly 200 includes a back plate 220 and a slide rail 210; the back plate 220 is spaced apart from the diffuser 100, and the slide rail 210 is disposed on the side of the back plate 220 facing the diffuser 100; the slide rail 210 is configured with the slide groove portion 211. In an embodiment, the slide rail 210 can be fixed or welded or snapped on the back plate 220 by a screw. The slide rail 210 has a track wall, and the track wall defines the slide groove portion 211. After the clamping structure 110 is clamped into the slide groove portion 211, it contacts the track wall and then moves along the track wall.

[0051] In an embodiment, the track wall is arranged according to the shape of the holding structure 110. For example, the holding structure 110 is mushroom-shaped (conical or similar to a conical shape) or circular; the track wall can be annular to fit the holding structure 110, such as having two track walls, the two track walls are arranged at intervals and curved to define a groove 211b with a circular cross-section.

[0052] As an optional implementation of the above embodiment, Figure 2 , Figure 4 and Figure 8 As shown, the slide rail 210 includes a bracket 212, and the bracket 212 is arranged on the back plate 220; the slide groove portion 211 is arranged on the bracket 212. In an embodiment, the bracket 212 is fixed or welded or snapped on the back plate 220 by a screw. The track wall of the slide rail 210 is fixed on the bracket 212, defining the slide groove portion 211. In an embodiment, the slide rail 210 can be a structural component.

[0053] As an optional implementation of the above embodiment, the holding structure 110 is integrally injection-molded on the diffuser plate 100 or secondary injection-molded on the diffuser plate 100. In the embodiment, the holding structure 110 can be formed on the diffuser plate 100 by using an in-mold insert injection molding process or a common integral injection molding process. For example, the holding structure 110 can be directly formed on the first side surface S1 of the diffuser plate 100 by using an in-mold insert injection molding process or a common integral injection molding process; for another example, the holding structure 110 can be formed on the support column 120 extending from the first side surface S1 of the diffuser plate 100 by using an in-mold insert injection molding process or a common integral injection molding process.

[0054] In the technical solution of the embodiment of the present application, the holding structure 110 and the slide groove portion 211 are both elastic parts; for example, the holding structure 110 is PC, and the slide groove portion 211 is TPV material.

[0055] The embodiment of the present application also proposes a display device, including a backlight module 10. The backlight module 10 adopts part or all of the technical solutions in the aforementioned embodiment, so the display device has part or all of the technical advantages of the aforementioned embodiment, which will not be repeated here. The embodiment of the present application does not impose specific restrictions on the applicability of the display device, which can be a handheld device (smartphone, tablet computer, etc.), wearable device (smart bracelet, wireless headset, smart watch, smart glasses, etc.), vehicle-mounted equipment (navigation system, auxiliary reversing system, driving recorder, car refrigerator, etc.), virtual reality equipment, augmented reality equipment, terminal equipment (Terminal Device), etc., without limitation here.

[0056] The above is a detailed introduction to a backlight module and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A backlight module, characterized in that: include: A back plate assembly, wherein the back plate assembly is provided with a slide groove portion; A diffuser plate, the diffuser plate is spaced apart from the back plate assembly; the diffuser plate has a first side surface facing the back plate assembly, a clamping structure is convexly provided on the first side surface; the clamping structure is clamped into the slide groove portion, and the clamping structure is movable in the slide groove portion in a direction parallel to the first side surface.

2. The backlight module according to claim 1, characterized in that: The slide groove portion limits the movement of the holding structure in a direction perpendicular to the first side surface.

3. The backlight module according to claim 2, characterized in that: The slide slot portion has a notch disposed toward the diffuser plate and a groove formed by being recessed from the notch away from the diffuser plate; the clamping structure is an elastic member; The clamping structure is clamped into the groove through the notch; the width of the notch is smaller than the width of the groove, so as to limit the movement of the clamping structure in a direction perpendicular to the first side surface.

4. The backlight module according to claim 1, wherein: The diffuser has a center, and the diffuser has a ray passing through the center and parallel to the first side surface; The slide groove portion has an extending direction parallel to the first side surface, and the extending direction is parallel to the ray.

5. The backlight module according to any one of claims 1 to 4, characterized in that: There are multiple slide grooves and multiple clamping structures; the clamping structures are clamped into the corresponding slide grooves one by one.

6. The backlight module according to claim 1, wherein: The diffusion plate has a support column, which is fixed on the first side surface and extends toward the back plate assembly; the clamping structure is arranged at one end of the support column away from the first side surface.

7. The backlight module according to claim 1 or 6, characterized in that: The back plate assembly comprises a back plate and a slide rail; the back plate is spaced apart from the diffuser plate, and the slide rail is arranged on a side of the back plate facing the diffuser plate; The slide rail is configured with the slide groove portion.

8. The backlight module according to claim 7, characterized in that: The slide rail comprises a bracket, and the bracket is arranged on the back plate; the slide groove part is arranged on the bracket.

9. The backlight module according to claim 1, wherein: The holding structure is integrally injection-molded on the diffusion plate or is secondary injection-molded on the diffusion plate.

10. A display device, characterized in that: A backlight module comprising any one of claims 1-9.

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