CN101561582B - Backlight module structure - Google Patents

Abstract

The invention provides a backlight module structure, which comprises a frame and a light guide plate; the frame is provided with a bearing part, one surface of the bearing part is used for bearing the display module, the bearing part is provided with a plurality of flanges and a plurality of grooves, the flanges and the grooves are staggered, the light guide plate is accommodated in the frame and correspondingly provided with positioning grooves and positioning sheets, and the positioning grooves and the positioning sheets of the light guide plate are mutually clamped and embedded with the flanges and the grooves of the frame; therefore, the light guide plate is stably fixed on the frame, the attaching area of the display module and the frame can be increased, the structural strength is effectively enhanced, and the problems of inconvenient assembly, difficult positioning, hole breaking and the like which are possibly generated after the traditional backlight module is thin can be solved.

Description

Backlight module structure

technical field

The invention relates to a backlight module structure, in particular to a backlight module structure which can not only fix the light guide plate stably on the frame, but also increase the attachment area between the display module and the frame, effectively improve the drop test, and enhance the structural strength.

Background technique

The thinner backlight module is the trend of the times. In order to achieve the thinner module, the structure generally adopted, as shown in FIG. 1 to FIG. The light guide plate 20 matched with the frame 10 is shown; the frame 10 has a bearing portion 11, and the bearing portion 11 includes a front side 11a and a back side 11b, wherein the front side 11a is used to carry a liquid crystal display module (not shown in the figure) Out), the bearing part 11 has a generally rectangular accommodation hole 111, the periphery of the accommodation hole 111 is provided with a plurality of grooves 12a-12e, as shown in the figure, three of the grooves 12a-12c are arranged on the bearing The front side 11a of the part 11 used to carry the display module is arranged in a triangular position, while the other two grooves 12d and 12e are arranged on both sides of the back side 11b of the supporting part 11, and the plurality of grooves 12a～ 12e are misaligned with each other.

Please refer again to the light guide plate (Light Guide) 20 shown in FIG. 5 and FIG. 6 that cooperates with the aforementioned frame 10 (as shown in FIG. 1 ). There are a plurality of positioning pieces 22a-22e; please refer to FIG. 7 and FIG. In the grooves 12a-12e, the light guide plate 20 is positioned in the frame 10; then the optical film set and the display module (not shown in the figure) are installed to complete the assembly.

However, the above conventional structure has the following deficiencies:

1. In order to achieve thinning of the frame 10, the thickness of the bearing part 11 is bound to be thinner accordingly. As a result, when forming the grooves 12a-12e, it is very easy to produce holes when the frame is stripped due to insufficient thickness. , unusable.

2. To prevent the frame 10 from being broken after the mold is opened, the grooves 12a-12e can be arranged on the back surface 11b of the bearing part 11, but in this way, the light guide plate 20 cannot be positioned on the frame 10; and If the light guide plate 20 is positioned on the frame 10 by using the adhesive on the reflective sheet opposite to it, it will easily cause the display module to be separated from the frame 10 and break during the drop test.

3. In order to prevent the above-mentioned defects, if the grooves 12a-12e are all arranged on the front surface 11a carrying the display module, the attachment area between the frame 10 and the display module will be insufficient, and similarly, the display module will be dropped. During the test, it was separated from the frame 10 and ruptured.

Contents of the invention

In view of the lack of conventional technology, the purpose of the present invention is to propose a backlight module structure, which not only enables the light guide plate to be firmly fixed on the frame, but also increases the attachment area between the display module and the frame, effectively improves the drop test, and enhances the structural strength. It can solve the problems of inconvenient assembly, difficult positioning and broken holes that may occur after the traditional display module is thin.

In order to achieve the above object, the present invention proposes a backlight module structure, which includes a frame and a light guide plate, and the frame has a bearing portion, the bearing portion has a receiving hole, and the bearing portion is located on the periphery of the receiving hole There are a plurality of flanges and a plurality of grooves, the flanges and the grooves are mutually offset, and the light guide plate is embedded in the accommodating hole of the frame, and the light guide plate corresponds to the flanges and grooves of the frame, A positioning groove and a positioning piece are provided, and the positioning groove and the positioning piece of the light guide plate are concave-convexly fitted with the flange and the groove of the frame. The carrying portion has a front and a back, the front is used to directly carry a liquid crystal display module, the back is located on the opposite side of the front, and the surface of the plurality of flanges in contact with the positioning groove of the light guide plate is lower than the surface of the front height, and the plurality of grooves are arranged on the back of the bearing part.

In order to have a further understanding and recognition of the structure, purpose and effect of the present invention, a detailed description is given below with the help of diagrams.

Description of drawings

Fig. 1 is a front structural perspective view of a conventional frame embodiment.

Fig. 2 is an enlarged view of part A of Fig. 1 .

Fig. 3 is a rear structural perspective view of the frame embodiment in Fig. 1 .

FIG. 4 is an enlarged view of part B of FIG. 3 .

FIG. 5 is a front structural perspective view of an embodiment of a light guide plate matched with the frame in FIG. 1 .

FIG. 6 is a rear structural perspective view of the embodiment of the light guide plate in FIG. 5 .

FIG. 7 is a front structural perspective view of the light guide plate of FIG. 5 assembled on the frame of FIG. 1 .

FIG. 8 is a rear perspective view of the assembled structure of FIG. 7 .

Fig. 9 is a front structural perspective view of a frame embodiment of the present invention.

FIG. 10 is an enlarged view of part C in FIG. 9 .

Fig. 11 is a perspective view of the rear structure of the embodiment of the frame in Fig. 9 .

FIG. 12 is an enlarged view of part D in FIG. 3 .

FIG. 13 is a front structural perspective view of an embodiment of a light guide plate matched with the frame in FIG. 9 .

FIG. 14 is a rear structural perspective view of the embodiment of the light guide plate in FIG. 13 .

FIG. 15 is a front structural perspective view of the light guide plate of FIG. 13 assembled on the frame of FIG. 9 .

FIG. 16 is a rear perspective view of the assembled structure of FIG. 15 .

FIG. 17 is a cross-sectional structure diagram of E-E in FIG. 15 .

FIG. 18 is a schematic diagram showing the structure of the light guide plate of the present invention avoiding the light-emitting area.

Explanation of main component symbols

1. Previous technology:

10-frame

11-Loading part

11a-Front side of bearing part

11b-The back of the bearing part

12a～12e-groove

20-light guide plate

22a～22e-Positioning piece

Two, the present invention:

30-frame

31-Loading part

31a-Front side of bearing part

31b - the back of the carrying part

311-Accommodating hole

32a～32d-flange

32e, 32f-groove

33-recess

34-Lighting components

35 - Luminous area

40-light guide plate

42a～42d-positioning groove

42e, 42f-positioning piece

50-display module

60-optical diaphragm group

70-Black and white double-sided tape

H1- the height of the surface where the flange contacts the positioning groove of the light guide plate

H2- the height of the surface of the bearing part for bearing the display module

H3- surface height of light guide plate

T1 - the thickness of the flange

T2-thickness around the receiving hole

T3 - Depth of groove

Detailed ways

The technical means and effects used by the present invention to achieve the purpose will be described below with reference to the attached drawings, and the embodiments listed in the following drawings are only for auxiliary explanation, to facilitate understanding, but the technical means of the present invention are not limited The diagrams listed.

First please refer to FIG. 9 to FIG. 12, the backlight module structure proposed by the present invention includes a frame 30, the frame 30 has a bearing portion 31, and the bearing portion 31 has a front 31a and a back 31b, wherein the front 31a is used to directly carry a liquid crystal display module (not shown in the figure), the carrying portion 31 has a generally rectangular accommodation hole 311, the periphery of the accommodation hole 311 is provided with a plurality of flanges 32a-32d, and a plurality of grooves 32e, 32f, and the flanges 32a-32d and the grooves 32e, 32f are misaligned with each other; Protrudes toward the receiving hole 311 ; and the plurality of grooves 32 e , 32 f are disposed on two sides of the receiving hole 311 , and are recessed from the periphery of the receiving hole 311 toward the frame 30 .

Please refer to the light guide plate 40 shown in FIG. 13 and FIG. 14 which is matched with the aforementioned frame 30. On the light guide plate 40, there are plural positions corresponding to the flanges 32a-32d of the frame 30 and the grooves 32e and 32f. Slots 42a-42d and positioning pieces 42e, 42f; please refer to FIG. 15 and FIG. 16, the light guide plate 40 can be inserted into the accommodating hole 311 of the frame 30, and the positioning grooves 42a-42d set around the light guide plate 20 The positioning pieces 42e and 42f on both sides of the light guide plate 20 can be respectively embedded in the corresponding grooves 32e and 32f.

It must be noted that, referring to FIG. 9 , in this embodiment, the top surface of the flanges 32a-32d of the frame 30 is lower than the surface of the supporting portion 31 for carrying the display module. Ideally, the plurality of flanges The top surfaces of 32a-32d are located on the same horizontal plane, and the grooves 32e, 32f are arranged on the back surface 31b of the bearing part 31, the thickness of the flanges 32a-32d is smaller than the thickness of the periphery of the accommodating hole 311, and the groove 32e The depth of , 32f is smaller than the thickness of the periphery of the accommodating hole 311 .

As shown in FIG. 17 , taking the flanges 32a, 32c and the groove 32e as an illustration, the height H1 of the contact surface between the flanges 32a, 32c and the positioning grooves 42a, 42c of the light guide plate 40 is lower than the front surface of the bearing part 31 31a surface height H2, and the groove 32e of the frame 30 is arranged on the back surface 31b of the bearing part 31; meanwhile, the thickness T1 of the flanges 32a, 32c is smaller than the thickness T2 of the periphery of the accommodating hole 311, and the groove 32e The depth T3 of the light guide plate 40 is less than the thickness T2 of the periphery of the accommodation hole 311; the light guide plate 40 is embedded in the accommodation hole 311 of the frame 30, and the positioning grooves 42a, 42c and the positioning piece 42e of the light guide plate 40 are in line with the flange of the frame After 32a, 32c and the groove 32e are interlocked with each other, an optical film set 60 is covered on the surface of the light guide plate 40. This type of optical film set 60 usually includes at least one brightness enhancement film and at least one diffusion film, etc., and the light guide plate 40 and the optical film set 60 are placed in sequence, the top of the light guide plate 40 is at the same height as the surface height H2 of the carrying portion 31, so as to facilitate attaching a black and white double-sided adhesive tape 70 to the display module 50 and the display module 50 at the same time. The surface of the carrying portion 31 of the frame 10 and the surface of the optical film set 60; moreover, the surface height H3 of the light guide plate 40 is not higher than the surface height H2 of the front surface 31a of the carrying portion 31. In this embodiment, the height H2 , H3 are the same, but it is better that the height H3 is slightly lower than the height H2; through the above structural design, the light guide plate 40 can be stably fixed on the frame 30.

And another effect that the structure provided by the present invention can achieve, see also shown in Figure 15, because this bearing part 31 does not need to be provided with any groove (such as 12a～12c of traditional frame 10 shown in Figure 1), therefore can keep the The integrity of the carrying portion 31 provides the display module with the largest attachment area and improves the combination between the display module and the frame.

In addition, please refer to FIG. 15 and FIG. 18 , the frame 30 is usually provided with a recess 33, and the recess 33 is used to set a light emitting component 34 (as shown in FIG. 18 ), and the light emitting component 34 can provide a light source to illuminate the The position of the light guide plate 40, the flanges 32a-32d and the grooves 32e, 32f of the frame 30, and the positioning grooves 42a-42d and the positioning pieces 42e, 42f of the light guide plate 40 should avoid the light-emitting area of the light-emitting component 34 35, so as to avoid generating crystal points (Hot Spars) on the light guide plate 40.

It is emphasized again that the structure of the backlight module proposed by the present invention, the shape of the frame and the light guide plate, as well as the flanges and grooves provided on the frame, or the shape and position of the positioning slots and positioning pieces provided on the light guide plate , does not limit the form of the aforementioned embodiments, the feature of the present invention is that the frame is provided with mutually misaligned flanges and grooves, and then matched with the light guide plate to provide relative positioning grooves and positioning pieces, not only can the light guide plate be stably fixed on the frame , and can increase the attachment area between the display module and the frame, effectively improve the drop test, enhance the structural strength, and solve the problems of inconvenient assembly, difficult positioning and broken holes that may occur after the traditional display module is thin.

However, the above descriptions are only the preferred embodiments of the present invention, and should not be used to limit the implementation scope of the present invention. That is, all equivalent changes and modifications made according to the scope of the patent application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims (9)

1. A backlight module structure, comprising: A frame, the frame has a bearing part, the bearing part has a housing hole, and the bearing part is provided with a plurality of flanges and a plurality of grooves on the periphery of the housing hole, and the flanges and the grooves are mutually misaligned set up; A light guide plate, the light guide plate is embedded in the accommodation hole of the frame, and the light guide plate is provided with a positioning groove and a positioning piece corresponding to the flange and the groove of the frame, and the positioning groove and the positioning piece of the light guide plate Concave-convex fit with the flange and the groove of the frame, Wherein, the carrying part has a front and a back, the front is used to directly carry a liquid crystal display module, the back is located on the opposite side of the front, and the surface of the plurality of flanges in contact with the positioning groove of the light guide plate is lower than the front The height of the surface is high, and the plurality of grooves are arranged on the back of the bearing part. 2. The backlight module structure according to claim 1, wherein the housing hole of the frame is rectangular, and the plurality of flanges are arranged at four corners of the housing hole, and protrude from the frame toward the housing hole. stretching; the plurality of grooves are arranged on both sides of the accommodating hole, and are concaved from the periphery of the accommodating hole toward the frame. 3. The backlight module structure as claimed in claim 1, wherein the thickness of the plurality of flanges is smaller than the thickness of the peripheral edge of the receiving hole, and the depth of the plurality of grooves is smaller than the thickness of the peripheral edge of the receiving hole. 4 . The backlight module structure according to claim 3 , wherein the height of the surface of the light guide plate is lower than the height of the surface carrying the display module. 5 . The backlight module structure according to claim 4 , wherein surfaces of the plurality of flanges in contact with the positioning grooves of the light guide plate are located on the same horizontal plane. 6 . 6. The backlight module structure according to claim 1, wherein the frame is provided with at least one light-emitting component, and the position of the flange and the groove of the frame is different from the light-emitting area of the light-emitting component. 7. The backlight module structure according to claim 1, wherein an optical module group is covered on the surface of the light guide plate. 8. The backlight module structure according to claim 7, wherein a black and white double-sided adhesive tape is attached to the surface of the optical module set. 9. The backlight module structure according to claim 8, wherein the black and white double-sided adhesive tape is attached to the surface of the bearing portion of the frame.

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