CN216927315U - Backlight module and interactive flat plate - Google Patents

Abstract

The application discloses backlight unit and mutual dull and stereotyped, backlight unit includes: a back plate; the functional membrane comprises a first side edge extending along a first preset direction and a second side edge extending along a second preset direction, and a first opening close to the first side edge and a second opening close to the second side edge are formed in the functional membrane; the first limiting piece is inserted into the first opening, the distance between the first limiting piece and the inner wall of the first opening along the first preset direction is a1, and the distance along the second preset direction is a 2; the second limiting piece is inserted into the second opening, the distance between the second limiting piece and the inner wall of the second opening along the first preset direction is b1, the distance along the second preset direction is b2, a1 is smaller than b1, and a2 is larger than b 2. In the present application, the functional membrane has a sufficient expansion and contraction space, and the functional membrane can be prevented from being warped due to expansion and contraction of the functional membrane.

Description

Backlight module and interactive flat plate

Technical Field

The application relates to the technical field of display, in particular to a backlight module and an interactive flat panel.

Background

In the backlight module of mutual dull and stereotyped, the substrate of function diaphragm all is PET (dacron resin) material usually, and the PET material is comparatively sensitive to humidity and temperature, and ambient temperature and ambient humidity's change can cause the function diaphragm to take place the inflation shrink, and the function diaphragm is generally fixed on the backplate, and the inflation shrink of function diaphragm leads to function diaphragm warpage easily.

SUMMERY OF THE UTILITY MODEL

The application provides a backlight unit and mutual dull and stereotyped can prevent that the function diaphragm from leading to function diaphragm warpage because of the inflation shrinkage.

In a first aspect, the present application provides a backlight module, comprising:

a back plate;

the functional diaphragm is arranged on one side of the back plate and comprises a first side edge and a second side edge, the first side edge extends along a first preset direction, and the second side edge extends along a second preset direction; a first opening and a second opening are formed in the surface of the functional membrane, the first opening is arranged close to the first side edge, and the second opening is arranged close to the second side edge;

the limiting assembly comprises a first limiting piece and a second limiting piece which are connected with the back plate, the first limiting piece is inserted in the first opening, and the second limiting piece is inserted in the second opening;

the distance between the first limiting piece and the inner wall of the first opening hole along the first preset direction is a1, the distance between the first limiting piece and the inner wall of the first opening hole along the second preset direction is a2, the distance between the second limiting piece and the inner wall of the second opening hole along the first preset direction is b1, the distance between the second limiting piece and the inner wall of the second opening hole along the second preset direction is b2, the a1 is smaller than the b1, and the a2 is larger than the b 2.

In a second aspect, the present application further provides an interactive flat panel, including a display screen and the backlight module as in any of the above embodiments, where the backlight module is located on a backside of the display screen.

The beneficial effect of this application does: through the design of the interval of the inner wall of first locating part and first trompil and the interval of the inner wall of second locating part and second trompil, make the function diaphragm on the first movable displacement who predetermines the direction on less and the second predetermines the movable displacement on the direction YY less basis, the second side has great expansion and contraction space in the first direction of predetermineeing, the first side has great expansion and contraction space in the second direction of predetermineeing, thereby can be on the basis that satisfies function diaphragm expansion and contraction demand, reduce the relative displacement of function diaphragm, thereby can prevent that function diaphragm and other materials from taking place great relative displacement and leading to the function diaphragm to appear the frostbite in vibration test or transportation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or related technologies of the present application, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present application;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is an enlarged schematic view at B of FIG. 1;

fig. 4 is an enlarged schematic view at C in fig. 1.

Reference numerals:

10. a back plate; 20. a functional membrane; 21. a first side edge; 22. a second side edge; 23. a third side; 24. a fourth side; 25. a first opening; 26. a second opening; 27. a third opening; 28. a fourth opening; 31. a first limit piece; 32. a second limiting member; 33. a third limiting member; 34. a fourth limiting member; 40. and (5) hanging a lug.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The application provides a backlight module and an interactive flat plate, which are used for solving the problem that a functional membrane is easy to warp due to expansion and contraction of the functional membrane in the backlight module of the interactive flat plate.

In a first aspect, the present application provides a backlight module, as shown in fig. 1, the backlight module includes a back plate 10, a functional film 20, and a position-limiting component.

The back plate 10 is used to provide protection for the functional membrane 20 and other components, the material for preparing the back plate 10 may be metal, ceramic or other materials, and the material for preparing the back plate 10 is not particularly limited in this application.

The functional film 20 is disposed on one side of the backplate 10, the functional film 20 includes a first side 21 and a second side 22, the first side 21 extends along a first preset direction XX, and the second side 22 extends along a second preset direction YY; the functional membrane 20 has a first opening 25 and a second opening 26 formed on a surface thereof, the first opening 25 is disposed near the first side 21, and the second opening 26 is disposed near the second side 22. The functional film 20 is an optical film, the functional film 20 includes but is not limited to one or more films such as a diffusion plate, a light guide plate, and a brightness enhancement film, and the light emitted from the light source in the backlight module can be processed by the functional film 20, so that the display of the interactive flat panel is more uniform. It will be appreciated that the first side 21 and the second side 22 are adjacent sides of the functional membrane 20.

It should be noted that fig. 1 only illustrates the case where the functional film 20 is square and the first predetermined direction XX and the second predetermined direction YY are perpendicular to each other, in practical implementation, the functional film 20 may also be in other shapes, such as a parallelogram or a prism, and the first predetermined direction XX and the second predetermined direction YY intersect at this time.

Specifically, the limiting assembly includes a first limiting member 31 and a second limiting member 32 connected to the back plate 10, the first limiting member 31 is inserted into the first opening 25, and the second limiting member 32 is inserted into the second opening 26, so as to limit the movement of the functional membrane 20 through the first limiting member 31 and the second limiting member 32.

However, when the functional film 20 expands and contracts due to changes in environmental temperature, environmental humidity, and the like, the first opening 25 and the second opening 26 will expand and contract, and the first opening 25 mainly expands and contracts in the second predetermined direction YY, and the second opening 26 mainly expands and contracts in the first predetermined direction XX, which may cause the first limiting member 31 to abut against the inner wall of the first opening 25, and the second limiting member 32 to abut against the inner wall of the second opening 26, thereby possibly causing the edge portion of the functional film 20 to warp.

Therefore, in order to avoid the warpage of the edge portion of the functional film 20 when the functional film 20 expands and contracts, the first opening 25 near the first side 21 needs to have a certain expansion and contraction space in the second preset direction YY, and the second opening 26 near the second side 22 needs to have a certain expansion and contraction space in the first preset direction XX.

In the present application, as shown in fig. 1 and fig. 2, a distance between the first limiting member 31 and the inner wall of the first opening 25 along the first predetermined direction XX is a1, and a distance between the first limiting member 31 and the inner wall of the first opening 25 along the second predetermined direction YY is a 2.

As shown in fig. 1 and 3, a distance between the second limiting member 32 and the inner wall of the second opening 26 along the first predetermined direction XX is b1, and a distance between the second limiting member 32 and the inner wall of the second opening 26 along the second predetermined direction YY is b 2.

It should be noted that, in the present application, a2 may provide enough expansion and contraction space for the first opening 25 in the second preset direction YY, and b1 may provide enough expansion and contraction space for the second opening 26 in the first preset direction XX, so that the edge portion of the functional film 20 may be prevented from being warped when the functional film 20 expands and contracts.

Specifically, as shown in fig. 1-3, a1 is less than b1 and a2 is greater than b 2.

It can be understood that, by providing the first limiting member 31 and the second limiting member 32 at the same time, both the first limiting member 31 and the second limiting member 32 can limit the position of the functional diaphragm 20, so that the movable displacement of the functional diaphragm 20 depends on the distance between the first limiting member 31 and the inner wall of the first opening 25, and the distance between the second limiting member 32 and the inner wall of the second opening 26. If a1 is greater than b1, the movable displacement of the functional diaphragm 20 along the first preset direction XX is b1, and if a2 is less than b2, the movable displacement of the functional diaphragm 20 along the second preset direction YY is a 2.

In the present application, since a1 is smaller than b1, the movable displacement of the functional membrane 20 along the first preset direction XX is a1, and a2 is larger than b2, the movable displacement of the functional membrane 20 along the second preset direction YY is b2, that is, by arranging a1, a2, b1 and b2, the movable displacement of the functional membrane 20 along the first preset direction XX and the second preset direction YY is reduced, so that the functional membrane 20 can be prevented from being worn due to a large relative displacement between the functional membrane 20 and other materials during a vibration test or transportation.

It should be further noted that, with continuing reference to fig. 1 to fig. 3, as will be understood by those skilled in the art, when the functional film 20 expands and contracts, the expansion and contraction degree of the edge area of the functional film 20 is the greatest, and at this time, the expansion and contraction degree of the first side 21 in the second predetermined direction YY is the greatest, and the expansion and contraction degree of the second side 22 in the first predetermined direction XX is the greatest, so that the expansion and contraction displacement of the first opening 25 in the first predetermined direction XX is much smaller than the expansion and contraction displacement of the second opening 26 in the first predetermined direction XX, and the expansion and contraction displacement of the first opening 25 in the second predetermined direction YY is much larger than the expansion and contraction displacement of the second opening 26 in the second predetermined direction YY.

Therefore, when the functional film 20 expands and contracts, the first opening 25 only needs to have a smaller expansion and contraction space in the first preset direction XX, and needs to have a larger expansion and contraction space in the second preset direction YY; the second opening 26 needs to have a larger expansion and contraction space in the first preset direction XX, and only a smaller expansion and contraction space in the second preset direction YY. Therefore, the smaller distance a1 can also provide enough expansion and contraction space for the first hole 25 along the first preset direction XX, and the smaller distance b2 can also provide enough expansion and contraction space for the second hole 25 along the second preset direction YY, so that the edge of the functional film 20 can be prevented from being warped due to the expansion and contraction of the functional film 20.

In summary, in the present application, by designing a1 and b1 such that a1 is smaller than b1, so that the movable displacement of the functional membrane 20 in the first preset direction XX is smaller, and the second side 22 has a larger expansion and contraction space in the first preset direction XX, and combining the designs of a2 and b2, so that a2 is larger than b2, so that the movable displacement of the functional membrane 20 in the second preset direction YY is smaller, and the first side 21 has a larger expansion and contraction space in the second preset direction YY, so that the relative displacement of the functional membrane 20 can be reduced on the basis of meeting the expansion and contraction requirements of the functional membrane 20, and thereby the functional membrane 20 and other materials can be prevented from being worn due to a large relative displacement during a vibration test or transportation.

As shown in fig. 1 and 4, in some embodiments of the present application, the functional film 20 further includes a third side 23, and the third side 23 is disposed opposite to the first side 21 and extends along the first preset direction XX; a third opening 27 is further formed in the surface of the functional membrane 20, and the third opening 27 is arranged close to the third side 23; the limiting component further includes a third limiting member 33 connected to the back plate 10, and the third limiting member 33 is inserted into the third opening 27.

The distance between the third limiting member 33 and the inner wall of the third opening 27 along the first preset direction XX is a3, the distance between the third limiting member 33 and the inner wall of the third opening 27 along the second preset direction YY is a4, a3 is smaller than b1, and a4 is larger than b 2.

It should be noted that the third limiting member 33 may also limit the movement of the functional membrane 20 along the first preset direction XX, and a distance a4 between the third limiting member 33 and the inner wall of the third opening 27 along the second preset direction YY may also provide an expansion and contraction space along the second preset direction YY for the functional membrane 20, and through the cooperation between the third limiting member 33 and the first limiting member 31, the connection between the functional membrane 20 and the back plate 10 may be strengthened on the basis of preventing the functional membrane 20 from warping due to the expansion and contraction of the functional membrane 20, and meanwhile, the limiting effect on the functional membrane 20 is strengthened.

Further, as shown in fig. 1, the functional membrane 20 further includes a fourth side 24, and the fourth side 24 is disposed opposite to the second side 22 and extends along the second preset direction YY; a fourth opening 28 is further formed on the surface of the functional membrane 20, and the fourth opening 28 is disposed near the fourth side 24; the limiting assembly further includes a fourth limiting member 34 connected to the back plate 10, and the second limiting member 32 is inserted into the fourth opening 28.

The distance between the fourth limiting element 34 and the inner wall of the fourth opening 28 along the first predetermined direction XX is b3, the distance between the fourth limiting element 34 and the inner wall of the fourth opening 28 along the second predetermined direction YY is b4, b3 is greater than a1 and a3, and b4 is less than a2 and a 4.

It is understood that the fourth limiting element 34 can also strongly limit the movement of the functional film 20 along the second preset direction YY, and the distance b3 between the fourth limiting element 34 and the inner wall of the fourth opening 28 along the first preset direction XX can provide an expansion and contraction space along the first preset direction XX for the functional film 20, and through the cooperation of the first limiting element 31, the second limiting element 32, the third limiting element 33 and the fourth limiting element 34, the connection between the functional film 20 and the backplate 10 can be strengthened on the basis of preventing the functional film 20 from warping due to the expansion and contraction of the functional film 20, and meanwhile, the limiting effect on the functional film 20 is strengthened.

In one embodiment, as shown in fig. 1 to 4, a2 is equal to a4, and b1 is equal to b3, so as to ensure the expansion uniformity of the functional membrane 20 in the first predetermined direction XX and the second predetermined direction YY.

It should be noted that specific values of a1, a2, a3, a4, b1, b2, b3 and b4 are related to the size of the functional diaphragm 20, in general, the larger the size of the functional diaphragm 20, the larger the specific values of a1, a2, a3, a4, b1, b2, b3 and b4 are, in general, when the length of the functional diaphragm 20 along the first preset direction XX is L1, and the length of the functional diaphragm 20 along the second preset direction YY is L2, the lengths of a1 and a3 are less than two thousandths of L2, the lengths of a2 and a4 are greater than or equal to two thousandths of L2, the lengths of b1 and b3 are greater than or equal to two thousandths of L1, and the lengths of b2 and b4 are less than two thousandths of L1; of course, the specific values of a1, a2, a3, a4, b1, b2, b3 and b4 can also be selected according to actual situations, and the application is not particularly limited.

In an embodiment, a1, a3, b2 and b4 may all be 0, that is, the first limiting member 31 contacts with the sidewalls of the first opening 25 along the first predetermined direction XX, the second limiting member 32 contacts with the sidewalls of the second opening 26 along the second predetermined direction YY, the third limiting member 33 contacts with the sidewalls of the third opening 27 along the first predetermined direction XX, and the fourth limiting member 34 contacts with the sidewalls of the fourth opening 28 along the second predetermined direction YY, so as to further reduce the movable displacement of the functional film 20, and prevent the functional film 20 from being worn due to a large relative displacement between the functional film 20 and other materials during a vibration test or transportation.

In one embodiment, with continued reference to fig. 1-4, the first opening 25 is disposed proximate a center of the first side 21, the second opening 26 is disposed proximate a center of the second side 22, the third opening 27 is disposed proximate a center of the third side 23, and the fourth opening 28 is disposed proximate a center of the fourth side 24.

It can be understood that, when the functional film 20 expands and contracts, the expansion and contraction degree of the central area of the functional film 20 is minimum, and the expansion and contraction degree of the edge area of the functional film 20 is maximum, and the expansion and contraction degree of the central positions of the first side 21 and the third side 23 in the first preset direction XX is minimum, and the expansion and contraction degree of the central positions of the second side 22 and the fourth side 24 in the second preset direction YY is minimum. By designing the positions of the first opening 25, the second opening 26, the third opening 27 and the fourth opening 28, the first opening 25, the second opening 26, the third opening 27 and the fourth opening 28 are all close to or located at the edge center of the functional film 20, so that when the functional film 20 expands and contracts, the expansion and contraction displacement of the first opening 25 and the third opening 27 along the first preset direction XX is extremely small, and the expansion and contraction displacement of the second opening 26 and the fourth opening 28 along the second preset direction YY is extremely small, so that the functional film 20 can be prevented from being warped due to the functional film 20 being pressed by each stopper when the functional film 20 expands and contracts.

In an embodiment, as shown in fig. 1 to 4, at least one of the first limiting member 31, the second limiting member 32, the third limiting member 33, and the fourth limiting member 34 may include a flange, and the flange is integrally formed with the back plate 10.

As known to those skilled in the art, the back plate 10 is generally mounted on the display screen of the interactive flat panel by flanging, and the flanging carried by the back plate 10 itself is used as a limiting member for limiting the functional membrane 20, so that the number of parts can be reduced, and the production cost can be reduced.

In an embodiment, at least one of the first limiting member 31, the second limiting member 32, the third limiting member 33 and the fourth limiting member 34 may be detachably connected to the back plate 10, so as to facilitate the assembling and disassembling of the functional membrane 20 on the back plate 10. Taking the first limiting member 31 detachably connected to the back plate 10 as an example, the first limiting member 31 may be a rivet, a screw, or a threaded rod.

It should be noted that the first limiting member 31, the second limiting member 32, the third limiting member 33, and the fourth limiting member 34 may be turned-over edges or components detachably connected to the back plate 10; the first limiting member 31, the second limiting member 32, the third limiting member 33, and the fourth limiting member 34 may also have a flange and a component detachably connected to the back plate 10, for example, the first limiting member 31, the second limiting member 32, and the third limiting member 33 are components detachably connected to the back plate 10, and the fourth limiting member 34 is a flange.

In an embodiment, with continued reference to fig. 1 to 4, the first side 21, the second side 22, the third side 23 and the fourth side 24 of the functional membrane 20 are provided with a hanging lug 40 connected to the functional membrane 20, and the first opening 25, the second opening 26, the third opening 27 and the fourth opening 28 are provided on the hanging lug 40. By arranging the first opening 25, the second opening 26, the third opening 27 and the fourth opening 28 on the hanging lug 40, the functional membrane 20 can be prevented from being damaged due to the opening of the functional membrane 20.

Wherein, hangers 40 and functional diaphragm 20 integrated into one piece to promote the joint strength of hangers 40 and functional diaphragm 20.

In a second aspect, based on the above backlight module, the present application further provides an interactive flat panel, which includes a display screen and the backlight module according to any of the above embodiments, wherein the backlight module is located on a back side of the display screen. The interactive tablet includes, but is not limited to, mobile phones, notebook computers, televisions, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), wearable devices, and other electronic devices.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims (10)

1. A backlight module, comprising:

a back plate;

the functional diaphragm is arranged on one side of the back plate and comprises a first side edge and a second side edge, the first side edge extends along a first preset direction, and the second side edge extends along a second preset direction; a first opening and a second opening are formed in the surface of the functional membrane, the first opening is arranged close to the first side edge, and the second opening is arranged close to the second side edge;

the limiting assembly comprises a first limiting piece and a second limiting piece which are connected with the back plate, the first limiting piece is inserted in the first opening, and the second limiting piece is inserted in the second opening;

the distance between the first limiting piece and the inner wall of the first opening hole along the first preset direction is a1, the distance between the first limiting piece and the inner wall of the first opening hole along the second preset direction is a2, the distance between the second limiting piece and the inner wall of the second opening hole along the first preset direction is b1, the distance between the second limiting piece and the inner wall of the second opening hole along the second preset direction is b2, the a1 is smaller than the b1, and the a2 is larger than the b 2.

2. The backlight module according to claim 1, wherein the functional film further comprises a third side opposite to the first side and extending along the first predetermined direction; a third opening is formed in the surface of the functional membrane, and the third opening is arranged close to the third side edge;

the limiting assembly further comprises a third limiting piece connected with the back plate, and the third limiting piece is inserted into the third opening;

the distance between the third limiting member and the inner wall of the third opening along the first preset direction is a3, the distance between the third limiting member and the inner wall of the third opening along the second preset direction is a4, the a3 is smaller than the b1, and the a4 is larger than the b 2.

3. The backlight module according to claim 2, wherein the functional film further comprises a fourth side, and the fourth side is disposed opposite to the second side and extends along the second predetermined direction; a fourth opening is further formed in the surface of the functional membrane, and the fourth opening is arranged close to the fourth side;

the limiting assembly further comprises a fourth limiting piece connected with the back plate, and the second limiting piece is inserted into the fourth opening;

the distance between the fourth limiting element and the inner wall of the fourth opening along the first preset direction is b3, the distance between the fourth limiting element and the inner wall of the fourth opening along the second preset direction is b4, b3 is greater than a1 and a3, and b4 is less than a2 and a 4.

4. A backlight module according to claim 3, wherein a2 equals a4 and b1 equals b 3.

5. A backlight module according to claim 4, wherein a1, a3, b2 and b4 are all 0.

6. The backlight module according to claim 3, wherein the first opening is disposed near a center of the first side, the second opening is disposed near a center of the second side, the third opening is disposed near a center of the third side, and the fourth opening is disposed near a center of the fourth side.

7. The backlight module according to claim 3, wherein at least one of the first, second, third and fourth position-limiting members comprises a flange, and the flange is integrally formed with the back plate.

8. The backlight module according to claim 3 or 7, wherein at least one of the first, second, third and fourth limiting members is detachably connected to the back plate.

9. The backlight module according to claim 3, wherein the first, second, third and fourth sides of the functional film are respectively provided with a hanging lug connected with the functional film, and the first, second, third and fourth openings are provided on the hanging lug.

10. An interactive tablet comprising a display screen and a backlight module according to any one of claims 1 to 9, the backlight module being located on a back side of the display screen.

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