CN102798094B - Rubber frame structure of backlight module and backlight module thereof - Google Patents

Abstract

A plastic frame structure of a backlight module is provided in a backplane to position a light guide plate. The plastic frame structure is flexible and includes a plastic frame body and at least one resisting member. The plastic frame body is located on the side of the light guide plate, and the resisting member is located on the plastic frame body and extends in the direction of the light guide plate to resist the light guide plate, limit the position of the light guide plate, and make the light guide plate close to the light source. The present invention also proposes a backlight module, including the aforementioned plastic frame structure.

Description

Plastic frame structure of backlight module and backlight module

【Technical field】

The invention relates to a backlight module and its plastic frame structure.

【Background technique】

The existing backlight module is composed of a back bezel, a light guide plate (LGP), a light source, a reflector, an optical film, a frame and an outer frame. Wherein, the light guide plate has a light-emitting surface, a bottom surface opposite to the light-emitting surface, and a light-incident side surface connecting the light-emitting surface and the bottom surface. The optical film is arranged on one side of the light emitting surface of the light guide plate; the reflector is arranged between the bottom surface of the light guide plate and the back plate; the light source is arranged next to the light incident side of the light guide plate; the plastic frame is arranged on the edge of the back plate and On the edge of the light guide plate, and finally the outer frame is fixed to package the above components.

Among them, the distance and angle between the light source and the light guide plate will have a considerable impact on the output luminance (Luminance) and uniformity (Uniformity) of the light guide plate. If the distance is too large, the light utilization efficiency will be poor. Generally speaking, in part design, a distance is set between the light incident surface of the light guide plate and the light source to prevent the light incident surface of the light guide plate from scratching or damaging the light source. When the distance between the light guide plate and the light source is farther, the light utilization efficiency will decrease more, thus affecting the quality of the backlight module, and then becoming a decisive factor to use the backlight module for the liquid crystal display.

In the prior art, the assembly of the light source and the light guide plate meets the requirement of high precision by designing a positioning mechanism on the backplane. However, using the positioning mechanism of the backplane design will result in a certain tolerance due to an assembly distance between the light guide plate and the backplane, resulting in the inability to fix the light utilization efficiency, and the assembly of the light source and the light guide plate cannot meet the high precision requirements.

【Content of invention】

In view of this, the present invention provides a plastic frame structure of a backlight module, which is located in the back plate to position the light guide plate. The plastic frame structure is flexible and includes a plastic frame body and at least one supporting member. The plastic frame body is located on the side of the light guide plate, and the resisting member is located on the plastic frame body and extends toward the light guide plate to resist the light guide plate, limit the position of the light guide plate, and make the light guide plate close to the light source.

The present invention also provides a backlight module, which includes a backplane, a light guide plate and the aforementioned plastic frame structure. The light guide plate is located on the back plate, and the plastic frame structure includes a plastic frame body and at least one resisting piece. The plastic frame body is located on the side of the light guide plate, and the resisting member is located on the plastic frame body and extends toward the light guide plate to resist the light guide plate, limit the position of the light guide plate, and make the light guide plate close to the light source.

The present invention divides the structure of the plastic frame used for the backlight module into a plastic frame body and a resisting part, and uses the resisting part located in the plastic frame body to resist the light guide plate to limit the position of the light guide plate. Therefore, the conventional backlight module solves the problem that the relative displacement between the light guide plate and the light source is caused by the tolerance of the assembly distance between the light guide plate and the back plate, so that the light utilization efficiency cannot be fixed or even weakened.

The detailed features and advantages of the present invention are described in detail below in the embodiments, the content of which is sufficient to enable any person familiar with the relevant art to understand the technical content of the present invention and implement it accordingly, and according to the content disclosed in this specification, the scope of the patent application and the drawings , anyone skilled in the relevant art can easily understand the related objects and advantages of the present invention.

【Description of drawings】

FIG. 1 is a schematic diagram of the application of the first embodiment of the present invention.

FIG. 2 is a schematic perspective view of the first embodiment of the present invention.

FIG. 2A is a schematic perspective view of the second embodiment of the present invention.

FIG. 2B is a perspective view of a third embodiment of the present invention.

FIG. 2C is a schematic perspective view of the fourth embodiment of the present invention.

FIG. 3A is a schematic view of the appearance of the fifth embodiment of the present invention.

FIG. 3B is a schematic diagram of the appearance of the sixth embodiment of the present invention.

[Description of main component symbols]

1 backlight module

11 Plastic frame structure

111 plastic frame body

111a extension

112 Resisting parts

112a Resistance part

112b connection part

112c abutment surface

112d inclined surface

112e Arc Hierarchy Structure

12 Backplane

121 bending part

13 Light guide plate

14 guide bevel

2 light source

3 holding tank

4 outer frame

【Detailed ways】

Please refer to FIG. 1 and FIG. 2, which are respectively the application schematic diagram and the perspective schematic diagram of the first embodiment of the present invention, disclosing a backlight module 1, including: a backplane 12, a light guide plate 13 and a plastic frame structure 11, The light guide plate 13 is located on the back plate 12, and the plastic frame structure 11 is used to resist the light guide plate 13, wherein the back plate 12 further includes a bent portion 121 embedded in the plastic frame structure 11, and the detailed structure and changes of the plastic frame structure 11 are as follows Various embodiments are disclosed. In addition, the application schematic diagram and the three-dimensional schematic diagram of the first embodiment of the present invention also disclose a plastic frame structure 11 of the backlight module 1 .

The plastic frame structure 11 in the first embodiment is disposed in the back plate 12 for positioning the light guide plate 13 , and includes a plastic frame body 111 and a resisting member 112 . The plastic frame body 111 is located on the side of the light guide plate 13 , and the resisting member 112 is located on the plastic frame body 111 and extends toward the direction of the light guide plate 13 for resisting the light guide plate 13 and limiting the position of the light guide plate 13 .

The light source 2 is arranged on the opposite side of the matching position of the plastic frame structure 11 and the light guide plate 13, whereby the abutment member 112 of the plastic frame structure 11 is pressed against the light guide plate 13 to limit the distance between the light guide plate 13 and the light source 2. The distance is such that the light guide plate 13 is close to the light source 2 . The plastic frame body 111 further includes an extension portion 111 a, and an accommodating groove 3 is formed between the extension portion 111 a and the resisting member 112 for accommodating the peripheral edge of the back plate 12 .

Please refer to FIG. 2A , which is a three-dimensional schematic diagram of the second embodiment of the present invention. The main difference between the second embodiment and the first embodiment is that this embodiment further discloses that the plastic frame body 111 of the plastic frame structure 11 of the backlight module 1 is in the length The plurality of abutting pieces 112 are connected in a direction, wherein, the long direction refers to the X-axis direction marked in FIG. 2A , and there may be gaps or other elements between the plurality of abutting pieces 112 or different shapes. Since the plastic frame structure 11 has a plurality of resisting parts 11 , it can match the flexibility of assembling the light guide plate 13 with a specific shape and other components.

Please refer to FIG. 2B , which is a three-dimensional schematic diagram of the third embodiment of the present invention. The main difference between the third embodiment and the second embodiment is that the third embodiment further discloses the supporting member 112 and the plastic frame structure 11 of the backlight module 1. The plastic frame body 111 has the same length, which means that, in the X-axis direction marked in FIG. 2B , the plastic frame body 111 and the supporting member 112 are of the same length, and the edges are also aligned. The plastic frame structure 11 has a resisting member 112 with the same length as the plastic frame body 111 , which has better rigidity and better resisting effect.

Please refer to FIG. 2C , which is a three-dimensional schematic diagram of the fourth embodiment of the present invention. The main difference between the fourth embodiment and the third embodiment is that the fourth embodiment further discloses that the supporting member 112 of the plastic frame structure 11 of the backlight module 1 is relatively small. The plastic frame body 111 is short. That is to say, in the X-axis direction marked in FIG. 2C , the resisting member 112 is shorter than the plastic frame body 111 . The plastic frame structure 11 with the abutting piece 112 shorter than the plastic frame body 111 has a shrinkage space to facilitate assembly with other components.

Please refer to FIG. 3A and FIG. 3B , which are schematic diagrams of the appearance of the fifth embodiment and the sixth embodiment of the present invention respectively. The resisting member 112 of the plastic frame structure 11 in these two embodiments further includes a resisting portion 112a and a connecting portion 112b . The resisting member 112 resists the light guide plate 13 through the resisting portion 112a; the connecting portion 112b is connected to the resisting portion 112a and the plastic frame body 111 respectively.

The main difference between the fifth embodiment and the first embodiment is that the resisting portion 112 a in the plastic frame structure 11 is located in the long direction of the plastic frame body 111 , and resists the light guide plate 13 in a line contact manner. Wherein, the definition of the long direction is as mentioned above. Line contact means that the contact between the abutting portion 112a and the light guide plate 13 is only a line. In one embodiment, the portion where the abutting portion 112a contacts the light guide plate 13 can be in the shape of a ridge or an arc, which can be assembled with other components. convenience.

The main difference between the sixth embodiment and the first embodiment is that the abutting portion 112 a in the plastic frame structure 11 includes an abutting surface 112 c abutting against the light guide plate 13 . In an embodiment, the side section of the resisting portion 112a may be rectangular or trapezoidal. The abutting portion 112a in this embodiment further includes an inclined surface 112d connected to the abutting surface 112c and inclined away from the light guide plate 13 , which is convenient for assembling with other components.

For any plastic frame structure 11 in the above-mentioned embodiments, the plastic frame body 111 and the extension part 111a may have guide slopes 14, which are used to reduce the mutual interference of components during the assembly process of the backlight module, so as to improve the assembly with other components. Convenience, the guide slope 14 can be 15 degrees to 75 degrees, preferably 30 degrees, 45 degrees or 60 degrees, but the present invention is not limited thereto. In addition, the connection positions of the plastic frame body 111 and the connecting portion 112b toward the backplane 12 can be arc-shaped hierarchical structures 112e. This design can avoid stress concentration at the connection positions when the plastic frame body 111 is subjected to external forces. And reduce the thickness of the plastic frame body 111 and the connecting portion 112b to improve the reliability of the plastic frame structure.

Any plastic frame structure 11 in the above embodiments can be assembled and fixed in the backlight module 1 in the following ways: 1. Mechanical locking, such as the cooperation of bolts and nuts; The folding portion 121, or 3. is directly encapsulated by the outer frame 4 of the panel, and uses the outer frame 4 to limit the position of the plastic frame structure 11, etc., but the present invention is not limited thereto.

It can be seen from the above embodiments that the plastic frame body 111 and the supporting member 112 form the plastic frame structure 11, through the plastic frame structure 11, the distance between the light guide plate 13 in the backlight module 1 and the light source 2 is limited to a required distance, It effectively solves the problems in the prior art that the light utilization efficiency cannot be fixed or even decreased due to the tolerance caused by the assembly spacing.

Although the technical content of the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention, and any modifications and modifications made by those skilled in the art without departing from the spirit of the present invention should be included in the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

Claims (9)

1. A plastic frame structure of a backlight module, which is positioned in a backplane to position a light guide plate, the light source is arranged on the opposite side of the plastic frame structure and the light guide plate, and the plastic frame structure comprises: a plastic frame body, located on the side of the light guide plate; and At least one resisting piece is located on the plastic frame body and extends toward the light guide plate, for resisting the light guide plate, restricting the light guide plate, and making the light guide plate close to the light source; wherein, the plastic frame body further includes a An extension part, a receiving groove is formed between the extension part and the resisting part, and is used for receiving the peripheral edge of the backboard. 2 . The plastic frame structure of the backlight module according to claim 1 , wherein the plastic frame body is connected with a plurality of the resisting members in the long direction. 3 . 3 . The plastic frame structure of the backlight module according to claim 1 , wherein the resisting member is equal in length to the plastic frame body in the long direction of the plastic frame body. 4 . 4. The plastic frame structure of the backlight module according to claim 1, wherein the supporting member comprises: a resisting portion, resisting the light guide plate; and A connecting portion connects the resisting portion and the plastic frame body. 5 . The plastic frame structure of the backlight module according to claim 4 , wherein the abutting portion abuts the light guide plate in a line contact manner along the length direction of the plastic frame body. 6 . The plastic frame structure of the backlight module according to claim 4 , wherein the abutting portion includes an abutting surface abutting against the light guide plate. 7 . 7 . The plastic frame structure of the backlight module according to claim 6 , wherein the resisting portion further comprises an inclined surface connected to the resisting surface and inclined away from the light guide plate. 8 . 8. A backlight module, comprising: a backplane; a light guide plate located on the back plate; and A plastic frame structure according to any one of claims 1 to 7, used for supporting the light guide plate. 9 . The plastic frame structure of the backlight module according to claim 8 , wherein the back plate includes a bent portion embedded in the plastic frame structure.

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