CN219320616U - Optical film fixing structure and backlight module - Google Patents

Abstract

The utility model relates to an optical film fixing structure and a backlight module, wherein the optical film fixing structure comprises: the light guide plate, first optical film and second optical film, be provided with first step through the light guide plate on, be provided with the second step on the first step, and the width of second step is less than the width of first step, first step gomphosis is in the first spacing groove of first optical film, the second step gomphosis is fixed first optical film and second optical film respectively in the second spacing groove of second optical film, with the mode of classifying dislocation, can avoid first optical film and second optical film laminating to appear becoming flexible the condition that jumps to take off on the light guide plate, can avoid the condition that dislocation appears in the mutual movement between first optical film and the second optical film, the light guide plate has even optical enhancement effect.

Description

Optical film fixing structure and backlight module

Technical Field

The present utility model relates to the field of liquid crystal backlight technology, and in particular, to an optical film fixing structure and a backlight module.

Background

At present, the LED backlight source technology is widely used for displaying instruments in automobiles because of long service life and low power consumption, common backlight modules are flexible circuit boards with LEDs welded on one side or two sides of a light guide plate in a fixed mode, and when light beams emitted by the LEDs pass through saw-tooth reticulation and cylindrical lattice points on the light guide plate, the light beams are uniformly distributed on the light guide plate, so that the display of automobile instrument panels is realized.

In the conventional backlight module, in order to improve the optical effect of the light guide plate, optical films such as a light diffusing film and a light intensifying film are generally attached to the light guide plate, but after each optical film is attached to the light guide plate, the whole optical film layer is easily shifted, and the optical films between the optical film layers are easily dislocated, so that the display effect of uneven brightness occurs on the light guide plate.

Disclosure of Invention

Accordingly, it is necessary to provide an optical film fixing structure and a backlight module.

The technical scheme for solving the technical problems is as follows: an optical film fixing structure, comprising:

the light guide plate is provided with a first step, a first surface of the first step is connected with a first surface of the light guide plate, a second surface of the first step is provided with a second step, the first surface of the second step is connected with a second surface of the first step, and the width of the second step is smaller than that of the first step;

the first optical film is provided with a first limit groove, the first surface of the first optical film is connected with the first surface of the light guide plate, and the first step is embedded in the first limit groove; and

The second optical film is provided with a second limit groove, the first surface of the second optical film is connected with the second surface of the first optical film, the first surface of the second optical film is connected with the second surface of the first step, and the second step is embedded in the second limit groove.

In one embodiment, the optical film fixing structure further includes: the third optical film is provided with a third step on the second step, the first surface of the third step is connected with the second surface of the second step, the width of the third step is smaller than that of the second step, the third optical film is provided with a third limit groove, the first surface of the third optical film is connected with the second surface of the second optical film, the first surface of the third optical film is connected with the second surface of the second step, and the third step is embedded in the third limit groove.

In one embodiment, a first adhesive layer is disposed on the second surface of the first step, the first surface of the first adhesive layer is connected to the second surface of the first step, and the second surface of the first adhesive layer is connected to the first surface of the second optical film.

In one embodiment, a second adhesive layer is disposed on the second surface of the second step, the first surface of the second adhesive layer is connected to the second surface of the second step, and the second surface of the second adhesive layer is connected to the first surface of the third optical film.

In one embodiment, the optical film fixing structure further includes: the first surface of the fourth optical film is connected with the second surface of the third optical film, the second surface of the third step is provided with a third adhesive layer, the first surface of the third adhesive layer is connected with the second surface of the third step, and the second surface of the third adhesive layer is connected with the first surface of the fourth optical film.

In one embodiment, a first surface of the light guide plate is provided with a limiting boss, the first optical film is provided with a first groove, the second optical film is provided with a second groove, the third optical film is provided with a third groove, the fourth optical film is provided with a fourth groove, the first groove, the second groove, the third groove and the fourth groove are aligned, and the limiting boss is embedded in the first groove, the second groove, the third groove and the fourth groove.

In one embodiment, the optical film fixing structure further includes: the bottom plate, the mounting groove has been seted up on the bottom plate, the light guide plate sets up in the mounting groove, the draw-in groove has been seted up on the lateral wall of mounting groove, be provided with the fixture block on one side of fourth optics diaphragm, the fixture block gomphosis is in the draw-in groove.

In one embodiment, the optical film fixing structure further includes: the middle frame is buckled on the bottom plate, an abutting block is arranged on the middle frame, and the abutting block abuts against the second surface of the fourth optical film.

In one embodiment, the middle frame is provided with an avoidance groove, and the limit boss is embedded in the avoidance groove.

The utility model also provides a backlight module, which comprises the optical film fixing structure in any one of the embodiments.

The beneficial effects of the utility model are as follows: according to the optical film fixing structure, the first step is arranged on the light guide plate, the second step is arranged on the first step, the width of the second step is smaller than that of the first step, the first step is embedded in the first limiting groove of the first optical film, the second step is embedded in the second limiting groove of the second optical film, the first optical film and the second optical film are respectively fixed in a step-by-step staggered mode, the situation that the first optical film and the second optical film are attached to the light guide plate and loose and jump off occurs can be avoided, the situation that the first optical film and the second optical film are staggered due to mutual movement can be avoided, and the light guide plate has a uniform optical enhancement effect.

Drawings

FIG. 1 is a schematic structural view of an optical film fixing structure according to an embodiment;

FIG. 2 is an enlarged schematic view of the structure shown at A in FIG. 1;

FIG. 3 is a schematic structural view of an optical film fixing structure according to an embodiment;

FIG. 4 is a schematic structural view of a middle frame according to an embodiment;

fig. 5 is a schematic structural diagram of a middle frame according to an embodiment.

In the attached drawings, 10, an optical film fixing structure; 100. a light guide plate; 110. a first step; 111. a first adhesive layer; 120. a second step; 121. a second adhesive layer; 130. a third step; 131. a third adhesive layer; 140. a limit boss; 200. a first optical film; 210. a first limit groove; 220. a first groove; 300. a second optical film; 310. the second limit groove; 320. a second groove; 400. a third optical film; 410. a third limit groove; 420. a third groove; 500. a fourth optical film; 510. a clamping block; 520. a fourth groove; 600. a bottom plate; 601. a mounting groove; 610. a clamping groove; 700. a middle frame; 710. an abutment block; 720. avoiding the groove.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The technical solution of the present utility model will be further described below with reference to the accompanying drawings of the embodiments of the present utility model, and the present utility model is not limited to the following specific embodiments.

It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., that indicate an azimuth or a positional relationship based on the directions or the positional relationships shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limitations of the present patent, and that the specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

In one embodiment, as shown in fig. 1 and 2, an optical film fixing structure 10 includes: the light guide plate 100, a first step 110 is disposed on the light guide plate 100, a first surface of the first step 110 is connected with a first surface of the light guide plate 100, a second step 120 is disposed on a second surface of the first step 110, a first surface of the second step 120 is connected with a second surface of the first step 110, and a width of the second step 120 is smaller than a width of the first step 110; a first optical film 200, a first limiting groove 210 is formed on the first optical film 200, a first surface of the first optical film 200 is connected with a first surface of the light guide plate 100, and the first step 110 is embedded in the first limiting groove 210; and a second optical film 300, wherein a second limiting groove 310 is formed in the second optical film 300, a first surface of the second optical film 300 is connected with a second surface of the first optical film 200, a first surface of the second optical film 300 is connected with a second surface of the first step 110, and the second step 120 is embedded in the second limiting groove 310.

In this embodiment, the height of the first step 110 on the light guide plate 100 is matched with the thickness of the first optical film 200, when the first optical film 200 is attached to the first surface of the light guide plate 100, the second surface of the first optical film 200 is flush with the second surface of the first step 110, the height of the second step 120 on the first step 110 is matched with the thickness of the second optical film 300, and when the second optical film 300 is attached to the second surface of the first optical film 200, the second surface of the second optical film 300 is flush with the second surface of the second step 120.

In this embodiment, the first step 110 is disposed on the light guide plate 100, the second step 120 is disposed on the first step 110, and the width of the second step 120 is smaller than that of the first step 110, the first step 110 is embedded in the first limiting groove 210 of the first optical film 200, the second step 120 is embedded in the second limiting groove 310 of the second optical film 300, and the first optical film 200 and the second optical film 300 are respectively fixed in a step-by-step staggered manner, so that the situation that the first optical film 200 and the second optical film 300 are attached to the light guide plate 100 and loose and jumped off occurs can be avoided, and the situation that the first optical film 200 and the second optical film 300 are dislocated due to mutual movement can be avoided, and the light guide plate 100 has a uniform optical enhancement effect.

In one embodiment, as shown in fig. 2, the first end of the first step 110 is aligned with the first end of the second step 120, and the length from the first end to the second end of the first step 110 is greater than the length from the first end to the second end of the second step 120, so that the first optical film 200 and the second optical film 300 can be fixed in a step-by-step dislocation manner, the situation that the first optical film 200 and the second optical film 300 are attached to the light guide plate 100 and loose and jumped can be avoided, and the situation that dislocation occurs when the first optical film 200 and the second optical film 300 move relative to each other can be avoided, and the light guide plate 100 has a uniform optical enhancement effect.

In one embodiment, the first side of the first step 110 is aligned with the first side of the second step 120, and the length from the first side to the second side of the first step 110 is greater than the length from the first side to the second side of the second step 120, so that the first optical film 200 and the second optical film 300 can be respectively fixed in a step-by-step dislocation manner, the situation that the first optical film 200 and the second optical film 300 are attached to the light guide plate 100 and loose and tripped can be avoided, and the situation that dislocation occurs when the first optical film 200 and the second optical film 300 are mutually moved can be avoided, so that the light guide plate 100 has a uniform optical enhancement effect.

In one embodiment, as shown in fig. 1, the optical film fixing structure 10 further includes: the third optical film 400 is provided with a third step 130 on the second step 120, a first surface of the third step 130 is connected with a second surface of the second step 120, a width of the third step 130 is smaller than a width of the second step 120, a third limiting groove 410 is formed in the third optical film 400, a first surface of the third optical film 400 is connected with a second surface of the second optical film 300, a first surface of the third optical film 400 is connected with a second surface of the second step 120, and the third step 130 is embedded in the third limiting groove 410. Specifically, when the height of the third step 130 on the second step 120 is matched with the thickness of the third optical film 400, and the third optical film 400 is attached to the second surface of the second optical film 300, the second surface of the third optical film 400 is aligned with the second surface of the third step 130, the length from the first end of the first step 110 to the second end of the second step 120 is greater than the length from the first end of the second step 120 to the second end of the third step 120, or the length from the first end of the second step 120 to the second end of the second step 130 is greater than the length from the first end of the third step 130, or the length from the first side of the first step 110 to the second side of the second step 120 is greater than the length from the first side of the second step 120 to the first side of the third step 130, so that the length from the first side of the second step 120 to the second side of the second step 120 is greater than the length from the first side of the second step 130, and the second optical film 400 can be prevented from moving evenly, and the first optical film 300 and the second optical film 300 can be prevented from being displaced, and the optical film 300 can be attached to each other, and the optical film 100 and the optical film 300 can be prevented from being displaced.

In one embodiment, as shown in fig. 2, a first adhesive layer 111 is disposed on the second surface of the first step 110, the first surface of the first adhesive layer 111 is connected to the second surface of the first step 110, and the second surface of the first adhesive layer 111 is connected to the first surface of the second optical film 300. Specifically, the two sides of the first adhesive layer 111 are respectively connected to the first step 110 and the second optical film 300, so that the second optical film 300 can be well connected to the first step 110, and the movement of the second optical film 300 in the Z-axis direction can be well limited.

In one embodiment, as shown in fig. 2, a second adhesive layer 121 is disposed on the second surface of the second step 120, and the first surface of the second adhesive layer 121 is connected to the second surface of the second step 120, and the second surface of the second adhesive layer 121 is connected to the first surface of the third optical film 400. Specifically, the two sides of the second adhesive layer 121 are respectively connected with the second step 120 and the third optical film 400, so that the third optical film 400 and the second step 120 can be well connected together, and the movement of the third optical film 400 in the Z-axis direction can be well limited.

In one embodiment, as shown in fig. 1 and 2, the optical film fixing structure 10 further includes: the first surface of the fourth optical film 500 is connected to the second surface of the third optical film 400, the second surface of the third step 130 is provided with a third adhesive layer 131, the first surface of the third adhesive layer 131 is connected to the second surface of the third step 130, and the second surface of the third adhesive layer 131 is connected to the first surface of the fourth optical film 500. Specifically, the two surfaces of the third adhesive layer 131 are respectively connected to the third step 130 and the fourth optical film 500, so that the fourth optical film 500 and the third step 130 can be well connected together, and the movement of the fourth optical film 500 in the Z-axis direction can be well restricted.

In one embodiment, the first optical film 200 is a light-diffusing film, and can diffuse and spread the light scattering conducted from the light guide plate 100, by enlarging the diffusion angle, the problem of uneven brightness can be overcome, and uniform surface light source light emission is achieved, the second optical film 300 is a lower brightness enhancement film, the third optical film 400 is an upper brightness enhancement film, and can concentrate the scattered light conducted by the light-diffusing film toward the front, further homogenize the light source and correct the light source, and play a role of improving brightness, the fourth optical film 500 is a peep-proof film, and the peep-proof film can make the data displayed by the screen dedicated to the user for front reading, and anyone can only see a painted black screen on both sides. It should be noted that the first optical film 200, the second optical film 300, the third optical film 400 and the fourth optical film 500 may be selected according to the optical enhancement effect or the optical performance required by the light guide plate 100, and are not particularly limited in this embodiment.

In one embodiment, as shown in fig. 1, a first surface of the light guide plate 100 is provided with a limiting boss 140, the first optical film 200 is provided with a first groove 220, the second optical film 300 is provided with a second groove 320, the third optical film 400 is provided with a third groove 420, the fourth optical film 500 is provided with a fourth groove 520, the first groove 220, the second groove 320, the third groove 420 and the fourth groove 520 are aligned, and the limiting boss 140 is embedded in the first groove 220, the second groove 320, the third groove 420 and the fourth groove 520. Specifically, the first step 110, the second step 120, and the third step 130 are disposed on one side of the first surface of the light guide plate 100, and the limiting boss 140 is disposed on one end of the first surface of the light guide plate 100, so that the first optical film 200, the second optical film 300, the third optical film 400, and the fourth optical film 500 can be fixed in the X-axis and Y-axis directions, and the loose and trip situation can be better avoided.

In one embodiment, as shown in fig. 3, the optical film fixing structure 10 further includes: the bottom plate 600, the mounting groove 601 has been seted up on the bottom plate 600, the light guide plate 100 sets up in the mounting groove 601, the draw-in groove 610 has been seted up on the lateral wall of mounting groove 601, be provided with fixture block 510 on one side of fourth optics diaphragm 500, fixture block 510 gomphosis is in the draw-in groove 610. Specifically, the shape and size of the clamping block 510 are adapted to the shape and size of the clamping groove 610, and the clamping block 510 is embedded in the clamping groove 610, so that the fourth optical film 500 and the bottom plate 600 can be connected together, the position between the fourth optical film 500 and the bottom plate 600 can be kept relatively still, the movement of the fourth optical film 500 in the X-axis direction is further limited, and the movement of the first optical film 200, the second optical film 300 and the third optical film 400 connected with the fourth optical film 500 in the X-axis direction can be further limited.

In one embodiment, as shown in fig. 3 and 4, the optical film fixing structure 10 further includes: the middle frame 700 is fastened to the bottom plate 600, the middle frame 700 is provided with an abutting block 710, and the abutting block 710 abuts against the second surface of the fourth optical film 500. Specifically, the abutment blocks 710 are disposed on one or both sides of the face of the middle frame 700 facing the light guide plate 100, and the movement of the fourth optical film 500 in the Z-axis direction can be further defined by abutting one or both sides of the fourth optical film 500 by the abutment blocks 710, so that the movement of the first, second, and third optical films 200, 300, 400 connected to the fourth optical film 500 in the Z-axis direction can be further defined.

In one embodiment, as shown in fig. 3 and 5, the middle frame 700 is provided with an avoidance groove 720, and the limit boss 140 is embedded in the avoidance groove 720. Specifically, the avoidance groove 720 is formed at one end or both ends of the surface of the middle frame 700 facing the light guide plate 100, and when the middle frame 700 is fastened to the bottom plate 600, the limit boss 140 is embedded in the avoidance groove 720, and the surface of the middle frame 700 facing the light guide plate 100 can abut against one end or both ends of the fourth optical film 500, so that the movement of the fourth optical film 500 in the Z-axis direction can be further limited, and the movement of the first optical film 200, the second optical film 300, and the third optical film 400 connected to the fourth optical film 500 in the Z-axis direction can be further limited.

The utility model also provides a backlight module, which comprises the optical film fixing structure 10 in any embodiment. In this embodiment, the backlight module further includes a flexible circuit board, a lamp bead, and the like, the lamp bead is electrically connected to the flexible circuit board, and the lamp bead is aligned with one side of the light guide plate 100, which is to be understood that the backlight module may further include other elements, which are not described in detail herein.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. An optical film fixing structure, comprising:

the light guide plate is provided with a first step, a first surface of the first step is connected with a first surface of the light guide plate, a second surface of the first step is provided with a second step, the first surface of the second step is connected with a second surface of the first step, and the width of the second step is smaller than that of the first step;

the first optical film is provided with a first limit groove, the first surface of the first optical film is connected with the first surface of the light guide plate, and the first step is embedded in the first limit groove; and

The second optical film is provided with a second limit groove, the first surface of the second optical film is connected with the second surface of the first optical film, the first surface of the second optical film is connected with the second surface of the first step, and the second step is embedded in the second limit groove.

2. The optical film fixing structure according to claim 1, further comprising: the third optical film is provided with a third step on the second step, the first surface of the third step is connected with the second surface of the second step, the width of the third step is smaller than that of the second step, the third optical film is provided with a third limit groove, the first surface of the third optical film is connected with the second surface of the second optical film, the first surface of the third optical film is connected with the second surface of the second step, and the third step is embedded in the third limit groove.

3. The optical film fixing structure according to claim 2, wherein a first adhesive layer is disposed on the second surface of the first step, the first surface of the first adhesive layer is connected to the second surface of the first step, and the second surface of the first adhesive layer is connected to the first surface of the second optical film.

4. The optical film fixing structure according to claim 3, wherein a second adhesive layer is disposed on the second surface of the second step, the first surface of the second adhesive layer is connected to the second surface of the second step, and the second surface of the second adhesive layer is connected to the first surface of the third optical film.

5. The optical film fixing structure according to claim 4, further comprising: the first surface of the fourth optical film is connected with the second surface of the third optical film, the second surface of the third step is provided with a third adhesive layer, the first surface of the third adhesive layer is connected with the second surface of the third step, and the second surface of the third adhesive layer is connected with the first surface of the fourth optical film.

6. The optical film fixing structure according to claim 5, wherein a limiting boss is disposed on the first surface of the light guide plate, a first groove is disposed on the first optical film, a second groove is disposed on the second optical film, a third groove is disposed on the third optical film, a fourth groove is disposed on the fourth optical film, and the first groove, the second groove, the third groove and the fourth groove are aligned, and the limiting boss is embedded in the first groove, the second groove, the third groove and the fourth groove.

7. The optical film fixing structure according to claim 6, further comprising: the bottom plate, the mounting groove has been seted up on the bottom plate, the light guide plate sets up in the mounting groove, the draw-in groove has been seted up on the lateral wall of mounting groove, be provided with the fixture block on one side of fourth optics diaphragm, the fixture block gomphosis is in the draw-in groove.

8. The optical film fixing structure according to claim 7, further comprising: the middle frame is buckled on the bottom plate, an abutting block is arranged on the middle frame, and the abutting block abuts against the second surface of the fourth optical film.

9. The optical film fixing structure according to claim 8, wherein the middle frame is provided with an avoidance groove, and the limit boss is embedded in the avoidance groove.

10. A backlight module comprising the optical film fixing structure of any one of claims 1 to 9.

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