TW201344298A - Back light unit module and frame structure thereof - Google Patents

Abstract

A frame structure of back light unit module is provided for fixing position of light guide plate. The frame structure is flexible and includes a frame body and at least one propping component. The frame body is disposed at the side of the light guide plate. The propping component which extends in a direction toward the light guide plate props the frame body so as to constrain the position of the light guide plate and make the light guide plate be close to the light source. In addition, a back light unit module, including the frame structure is also provided.

Description

Plastic frame structure of backlight module and backlight module thereof

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

The conventional backlight module is composed of a back bezel, a light guide plate (LGP), a light source, a reflection sheet, an optical film, a frame, and an outer frame. The light guide plate has a light-emitting surface, a bottom surface with respect to the light-emitting surface, and a light-incident side surface connecting the light-emitting surface and the bottom surface. The optical film is disposed on a side of the light-emitting surface of the light guide plate; the reflective sheet is disposed between the bottom surface of the light guide plate and the back plate; the light source is disposed beside the light-incident side of the light guide plate; the plastic frame is disposed at an edge of the back plate On the edge of the light guide plate, the outer frame is finally fixed to package the above components.

The distance between the light source and the light guide plate and the angle of the light guide plate have a significant influence on the output luminance (Luminance) and uniformity (Uniformity) of the light guide plate. If the distance is too large, the light use efficiency is poor. Generally, in the design of the part, a distance is set between the light incident surface of the light guide plate and the light source to prevent the light guide surface from being scratched or damaged. When the distance between the light guide plate and the light source is farther, the more the light utilization efficiency is lowered, thus affecting the quality of the backlight module, and thus the determinant of whether or not the liquid crystal display of the backlight module is used.

The prior art technology provides a high-accuracy requirement for the assembly of the light source and the light guide plate through the design of the positioning mechanism on the back plate. However, the use of the backplane design positioning mechanism causes a certain tolerance between the light guide plate and the back plate, resulting in a certain tolerance of light utilization efficiency, and the assembly of the light source and the light guide plate cannot achieve high precision requirements.

In view of the above, the present invention provides a plastic frame structure of a backlight module, which is located in the back plate and positions the light guide plate. The plastic frame structure has flexibility, and comprises a plastic frame body and at least one resisting member. The frame is located on the side of the light guide plate. The resisting member is located on the frame body and extends toward the light guide plate to abut the light guide plate to limit the position of the light guide plate and close the light guide plate to the light source.

The invention also provides a backlight module, comprising a back plate, a light guide plate and the foregoing plastic frame structure. The light guide plate is located on the back plate, and the plastic frame structure comprises a plastic frame body and at least one resisting member. The plastic frame body is located at a side of the light guide plate, and the resisting member is located in the frame body and extends toward the light guide plate to abut the light guide plate to limit the position of the light guide plate and close the light guide plate to the light source.

In the invention, the plastic frame structure of the backlight module is divided into a plastic frame body and a resisting member, and the resisting member located on the plastic frame body abuts the light guiding plate to limit the position of the light guiding plate. Therefore, the conventional backlight module has a tolerance of an assembly pitch between the light guide plate and the back plate, which causes a relative displacement between the position of the light guide plate and the light source, so that the light utilization efficiency cannot be fixed or even weakened.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art.

Please refer to FIG. 1 and FIG. 2 , which are respectively a schematic view of the application of the first embodiment of the present invention and a perspective view of the first embodiment, and discloses a backlight module 1 including: a back plate 12 , a light guide plate 13 and a plastic frame structure 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. The back plate 12 further includes a bent portion 121, and is embedded in the plastic frame structure 11. The detailed structure and variation of the plastic frame structure 11 It is disclosed by the following various embodiments. In addition, the application schematic diagram of the first embodiment of the present invention and the perspective view of the first embodiment also disclose a plastic frame structure 11 of the backlight module 1.

The frame structure 11 in the first embodiment is disposed in the back plate 12 for positioning the light guide plate 13 and includes the frame body 111 and the resisting member 112. The frame body 111 is located at the side of the light guide plate 13 . The resisting member 112 is located in the frame body 111 and extends toward the light guide plate 13 to resist the light guide plate 13 and limit the position of the light guide plate 13 .

The light source 2 is disposed on the opposite side of the matching position of the plastic frame structure 11 and the light guide plate 13 , whereby the resisting member 112 of the plastic frame structure 11 abuts the light guide plate 13 to limit the gap between the light guide plate 13 and the light source 2 . The distance between the light guide plate 13 and the light source 2 is made. The frame body 111 further includes an extending portion 111a, and a receiving groove 3 is formed between the extending portion 111a and the resisting member 112 for receiving the periphery of the backing plate 12.

Please refer to FIG. 2A, which is a perspective view of a second embodiment of the present invention. The main difference between the second embodiment and the first embodiment is that the present embodiment further discloses the plastic frame body 111 of the plastic frame structure 11 of the backlight module 1. A plurality of resisting members 112 are connected in the longitudinal direction, wherein the long direction refers to the X-axis direction indicated in FIG. 2A, and the plurality of resisting members 112 may have a gap or other elements may have different shapes. Since the plastic frame structure 11 has a plurality of resisting members 11, the flexibility of assembling the light guide plate 13 and other components of a specific shape can be matched.

FIG. 2B is a perspective view of a third embodiment of the present invention. The third embodiment further discloses that the third embodiment further discloses the resisting member of the plastic frame structure 11 of the backlight module 1. The 112 series is equal in length to the frame body 111, that is, in the X-axis direction marked in FIG. 2B, the frame body 111 is equal in length to the resisting member 112, and the edges are also aligned. The plastic frame structure 11 has a resisting member 112 that is equal in length to the plastic frame body 111, and has better rigidity and better resistance.

Referring to FIG. 2C, a perspective view of a fourth embodiment of the present invention is shown. The fourth embodiment further discloses that the fourth embodiment further discloses the resisting member of the plastic frame structure 11 of the backlight module 1. The 112 is shorter than the frame body 111. That is, the resisting member 112 is shorter than the plastic frame body 111 in the X-axis direction indicated in FIG. 2C. The frame structure 11 having the shorter frame member 111 than the frame body 111 has a constricted space for facilitating assembly of other components.

3A and 3B are respectively schematic views of the fifth embodiment and the sixth embodiment of the present invention. The resisting member 112 of the plastic frame structure 11 in the second embodiment further includes a resisting portion 112a and a connection. Part 112b. The resisting member 112 is pressed against the light guide plate 13 by the abutting portion 112a; the connecting portion 112b is connected to the resisting portion 112a and the frame body 111, respectively.

The main difference between the fifth embodiment and the first embodiment is that the abutting portion 112a of the plastic frame structure 11 is located in the longitudinal direction of the plastic frame body 111 and abuts against the light guide plate 13 in a line contact manner. Among them, the definition of the long direction is as described above. The line contact means that the contact between the resisting portion 112a and the light guide plate 13 is only one line. In an embodiment, the portion of the resisting portion 112a contacting the light guide plate 13 may be prismatic or arc-shaped, and has other components. The convenience of assembly.

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

In any of the above-mentioned embodiments, the frame body 111 and the extending portion 111a may have a guiding surface 14 for reducing interference between components during assembly of the backlight module to improve assembly with other components. For convenience, the guide surface 14 may be 15 degrees to 75 degrees, preferably 30 degrees, 45 degrees or 60 degrees, but the invention is not limited thereto. In addition, the connection position of the frame body 111 and the connecting portion 112b in the direction of the back plate 12 may be an arc-shaped hierarchical structure 112e. This design has the phenomenon of avoiding stress concentration at the connection position when the frame body 111 is subjected to an external force. And reducing the thickness of the frame body 111 and the connecting portion 112b, and improving the reliability of the frame structure.

The plastic frame structure 11 of the above embodiment can be assembled and fixed in the backlight module 1 by: 1. mechanical locking, such as the cooperation of bolts and nuts, 2. high molecular polymer bonding extension 111a and The bent portion 121 or 3. is directly encapsulated by the outer frame 4 of the panel, and the position of the plastic frame structure 11 is restricted by the outer frame 4, but the invention is not limited thereto.

It can be seen from the above embodiment that the plastic frame body 111 and the resisting member 112 form a plastic frame structure 11. The spacing between the light guide plate 13 and the light source 2 in the backlight module 1 is limited to one by the plastic frame structure 11. The distance is required to effectively solve the problems that the conventional technology causes tolerance due to the assembly pitch, so that the light utilization efficiency cannot be fixed or even decreased.

Although the technical content of the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any modifications and refinements made by those skilled in the art without departing from the spirit of the present invention are encompassed by the present invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

1. . . Backlight module

11. . . Plastic frame structure

111. . . Plastic frame body

111a. . . Extension

112. . . Resistor

112a. . . Responsible department

112b. . . Connection

112c. . . Resisting surface

112d. . . Inclined surface

112e. . . Arc hierarchy

12. . . Backplane

121. . . Bending section

13. . . Light guide

14. . . Bevel

2. . . light source

3. . . Locating slot

4. . . Outer frame

Figure 1 is a schematic view showing the application of the first embodiment of the present invention.

Fig. 2 is a perspective view showing the first embodiment of the present invention.

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

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

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

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

Fig. 3B is a schematic view showing the appearance of a sixth embodiment of the present invention.

11. . . Plastic frame structure

111. . . Plastic frame body

111a. . . Extension

112. . . Resistor

112a. . . Responsible department

112b. . . Connection

112c. . . Resisting surface

112d. . . Inclined surface

112e. . . Arc hierarchy

12. . . Backplane

121. . . Bending section

13. . . Light guide

14. . . Bevel

3. . . Locating slot

4. . . Outer frame

Claims (10)

A plastic frame structure of a backlight module is located in a backplane and is located at a light guide plate. The plastic frame structure comprises: a plastic frame body located at a side of the light guide plate; and at least one resisting member located at the plastic frame The body extends toward the light guide plate to resist the light guide plate. The plastic frame structure of the backlight module of claim 1, wherein the plastic frame body further comprises an extending portion, and a receiving groove is formed between the extending portion and the resisting member for receiving the periphery of the backing plate. The plastic frame structure of the backlight module of claim 1, wherein the plastic frame body is connected to the plurality of the resisting members in a long direction. The plastic frame structure of the backlight module of claim 1, wherein the resisting member is equal in length to the plastic frame body in the longitudinal direction of the plastic frame body. The plastic frame structure of the backlight module of claim 1, wherein the resisting member comprises: a resisting portion that abuts the light guiding plate; and a connecting portion that connects the resisting portion and the plastic frame body. The plastic frame structure of the backlight module of claim 5, wherein the resisting portion abuts the light guide plate in a line contact manner in a longitudinal direction of the plastic frame body. The frame structure of the backlight module of claim 5, wherein the abutting portion includes a resisting surface that abuts against the light guide plate. The plastic frame structure of the backlight module of claim 7, wherein the resisting portion further comprises an inclined surface connected to the resisting surface and inclined in a direction away from the light guide plate. A backlight module comprising: a backplane; a light guide plate located on the backplane; and a plastic frame structure according to any one of claims 1 to 8 for resisting the light guide panel. The plastic frame structure of the backlight module of claim 9, wherein the back plate comprises a bent portion embedded in the plastic frame structure.