CN201138411Y - Display and its backlight module - Google Patents

Abstract

A backlight module comprises a frame body, a light guide plate and a plurality of positioning structures. The frame body comprises an inner side wall and a plurality of frame body notches, wherein the plurality of frame body notches are formed on the inner side wall. The light guide plate comprises an outer edge and a plurality of light guide plate notches, wherein the plurality of light guide plate notches are formed on the outer edge and correspond to the plurality of frame notches. The positioning structures are clamped between the plurality of light guide plate notches and the plurality of frame body notches, wherein the plurality of positioning structures are abutted to restrict the degree of freedom of the light guide plate.

Description

Display and its backlight module

technical field

The utility model relates to a backlight module, in particular to a backlight module which can prevent a light guide plate from sliding before being assembled and combined with a liquid crystal panel.

Background technique

Referring to FIG. 1 , it shows a known backlight module 1 , including a frame body 10 , a light guide plate 20 and a lamp tube (not shown). The frame body 10 includes a frame body notch 11 . The light guide plate 20 includes lugs 21 . The lug 21 corresponds to the notch 11 of the frame body. When the light guide plate 20 is combined with the frame body 10 , the lug 21 is disposed in the notch 11 of the frame body, thereby limiting the movement of the light guide plate 20 on the x-y plane.

However, as the size of the backlight module becomes lighter and thinner, and the brightness requirements are higher and higher, when the backlight module uses a high-brightness light guide plate (V-Cut LGP), the traditional lug design is prone to the problem of bright lines.

Taiwan Patent Publication No. 00552440 also discloses a related backlight module. However, as mentioned above, due to the lug design, the problem of bright lines is likely to occur.

Taiwan Patent Publication I262279 discloses another backlight module, but this backlight module does not properly fix the light guide plate before assembling and combining with the liquid crystal panel. Therefore, when the backlight module is manufactured in one factory and then delivered to another factory for assembly, the light guide plate may detach from the backlight module, or even shift and break the lamp tube. In addition, when assembling the backlight module of Taiwan Patent Publication I262279, the light guide plate is also easily scratched, resulting in abnormal images.

Utility model content

The purpose of the utility model is to provide a backlight module which can avoid bright lines and securely fix the light guide plate.

Other purposes and advantages of the utility model can be further understood from the technical characteristics disclosed in the utility model.

In order to achieve one or part or all of the above objectives or other objectives, the backlight module of the embodiment of the present invention includes a frame body, a light guide plate and a plurality of positioning structures. The frame body includes an inner side wall and a plurality of frame body notches, wherein the plurality of frame body notches are formed on the inner side wall. The light guide plate includes an outer edge and a plurality of notches of the light guide plate, wherein the plurality of notches of the light guide plate are formed on the outer edge, and the plurality of notches of the light guide plate correspond to the plurality of notches of the frame body. The positioning structures are interposed between the plurality of notches of the light guide plate and the plurality of notches of the frame body, wherein the plurality of positioning structures abut against and constrain the degree of freedom of the light guide plate.

The embodiment of the utility model relates to a display, which includes a backlight module, a liquid crystal panel and an outer frame. The backlight module includes a frame body, a light guide plate and multiple positioning structures. The frame body includes an inner side wall and a plurality of frame body notches, wherein the plurality of frame body notches are formed on the inner side wall. The light guide plate includes an outer edge and a plurality of notches of the light guide plate, wherein the plurality of notches of the light guide plate are formed on the outer edge, and the plurality of notches of the light guide plate correspond to the plurality of notches of the frame body. The positioning structures are interposed between the plurality of notches of the light guide plate and the plurality of notches of the frame body, wherein the plurality of positioning structures abut against and constrain the degree of freedom of the light guide plate. The liquid crystal panel is arranged on the backlight module. The outer frame fixes the liquid crystal panel and the backlight module.

An embodiment of the present invention provides a backlight module, including a frame body, a light guide plate, a first positioning structure and a second positioning structure. The frame body includes an inner side wall, a first frame body notch and a second frame body notch, wherein the first frame body notch and the second frame body notch are formed on the inner side wall. The light guide plate includes an outer edge, a notch of the first light guide plate and a notch of the second light guide plate, wherein the notch of the first light guide plate and the notch of the second light guide plate are formed on the outer edge, and the notch of the first light guide plate corresponds to the first The notch of the frame body, the notch of the second light guide plate corresponds to the notch of the second frame body. The first positioning structure is sandwiched between the notch of the first light guide plate and the notch of the first frame body. The second positioning structure is sandwiched between the notch of the second light guide plate and the notch of the second frame body, wherein the first positioning structure and the second positioning structure abut to restrict the degree of freedom of the light guide plate.

The backlight module of the present invention is assembled and combined in front of the liquid crystal panel so that the positioning structure constrains the position of the light guide plate, thus avoiding the situation that the light guide plate is detached or moved during the transportation of the backlight module. The materials of the two positioning structures are plastic or other polymer materials, so the light guide plate can be avoided from being scratched. Both the notch of the light guide plate and the notch of the frame are semicircular holes, so bright lines can be avoided.

Description of drawings

Figure 1 shows a known backlight module;

Fig. 2 shows the backlight module of an embodiment of the present utility model;

Figure 3 shows an enlarged view of part A in Figure 2; and

Fig. 4 shows the display of an embodiment of the present utility model;

Figure 5a shows a modified example of the utility model; and

Fig. 5b shows another modified example of the utility model.

Detailed ways

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only the directions of the drawings. Therefore, the directional terms used are used to illustrate but not to limit the present invention.

Referring to FIG. 2 , it shows a backlight module 100 according to an embodiment of the present invention, including a frame body 110 , a light guide plate 120 , a positioning structure 130 and a light source (not shown). Referring to FIG. 3 , it shows an enlarged view of part A in FIG. 2 , wherein the frame body 110 includes an inner side wall 111 and a frame body notch 112 formed on the inner side wall 111 . The light guide plate 120 includes an outer edge 121 , a notch 122 of the light guide plate and a light emitting surface 123 , and the notch 122 of the light guide plate is formed on the outer edge 121 . The notch 122 of the light guide plate corresponds to the notch 112 of the frame body. The positioning structure 130 is interposed between the notch 122 of the light guide plate and the notch 112 of the frame body.

Returning to FIG. 2 , the outer edge of the light guide plate 120 includes a light incident surface 1211 , a constrained edge 1212 , a constrained edge 1213 and a constrained edge 1214 . The light incident surface 1211 corresponds to the light source, and the constrained side 1212 , the constrained side 1213 , and the constrained side 1214 are formed with notches in the light guide plate to connect with the positioning structure 130 . The constraint side 1213 is perpendicular to the constraint side 1212 , and the constraint side 1214 is parallel to the constraint side 1212 . Since the positioning structure 130 abuts against the light guide plate 120 from different sides of the light guide plate 120 at the same time, it can effectively limit the degree of freedom of the light guide plate 120 in the x-y direction.

In the embodiment of the present invention, both the notch 122 of the light guide plate and the notch 112 of the frame body are semicircular holes.

Referring to FIG. 3 , the positioning structure 130 includes a base 131 , a pin 132 and an abutment 133 , and the pin 132 connects the base 131 and the abutment 133 . The pin 132 is sandwiched between the notch 122 of the light guide plate and the notch 112 of the frame correspondingly, so as to limit the degree of freedom of the light guide plate 120 in the x-y direction. The base portion 131 and the abutting portion 133 abut against the light guide plate 120 and the frame body 110 , so that the degree of freedom of the light guide plate 120 in the z direction can be effectively restricted. The abutting portion 133 is a cone. The insertion direction of the positioning structure 130 is perpendicular to the light emitting surface 123 . When assembling, the light guide plate 120 is placed in the frame body 110 first, and then the positioning structure 130 is inserted between the notch 122 of the light guide plate and the notch 112 of the frame body.

In the above embodiments, the frame body 110 is made of plastic or other polymer materials. The two positioning structures 130 are made of plastic or other polymer materials.

Referring to FIG. 4 , an embodiment of the present invention provides a display 200 , including the backlight module 100 , a liquid crystal panel 210 , a diffusion sheet 220 , a brightness enhancement sheet 230 and a frame 240 . The diffusion sheet 220 and the brightness enhancement sheet 230 are disposed between the backlight module 100 and the liquid crystal panel 210 . The outer frame 240 fixes the liquid crystal panel 210 , the diffusion sheet 220 and the brightness enhancement sheet 230 .

The backlight module disclosed in the utility model is assembled and combined in front of the liquid crystal panel, so that the position of the light guide plate is constrained by the positioning structure, so that the situation that the light guide plate is detached or moved during the transportation of the backlight module can be avoided. The materials of the plurality of positioning structures are plastic or other polymeric materials, so the light guide plate can be avoided from being scratched. Both the notch of the light guide plate and the notch of the frame are semicircular holes, so bright lines can be avoided.

With reference to Fig. 5 a, it shows a modified example of the present utility model, it is characterized in that having positioning structure 141 (first positioning structure) and positioning structure 142 (second positioning structure), positioning structure 141 is located at constraint edge 1212 (first positioning structure) edge), the positioning structure 142 is disposed on the constraint edge 1213 (the second edge), and the constraint edge 1212 is perpendicular to the constraint edge 1213 .

Referring to Fig. 5b, it shows another modified example of the utility model, which is characterized in that it has a positioning structure 141 (first positioning structure) and a positioning structure 143 (second positioning structure), and the positioning structure 141 is located on the constraint side 1212 (first positioning structure). side), the positioning structure 143 is disposed on the constrained side 1214 (second side), and the constrained side 1212 is parallel to the constrained side 1214 .

The above-mentioned content is only a preferred embodiment of the utility model, and cannot limit the scope of implementation of the utility model, that is, simple equivalent changes and modifications made according to the scope of claims of the utility model and the content of the utility model description, Still all belong to the scope of claims of the present utility model. In addition, any embodiment of the utility model or the scope of claims does not necessarily achieve all the objects or advantages or features disclosed in the utility model. In addition, the abstract part and the title are only used to assist the retrieval of patent documents, and are not used to limit the scope of claims of the present utility model.

Claims (16)

1. A backlight module applied in a display, characterized in that it comprises: The frame body includes an inner side wall and a plurality of frame body notches, wherein the plurality of frame body notches are formed on the inner side wall; The light guide plate includes an outer edge and a plurality of light guide plate notches, wherein the plurality of light guide plate notches are formed on the outer edge, and the plurality of light guide plate notches respectively correspond to the plurality of frame body notches; and A plurality of positioning structures are respectively sandwiched between the plurality of notches of the light guide plate and the plurality of notches of the frame body, wherein the plurality of positioning structures abut against and constrain the degree of freedom of the light guide plate. 2. The backlight module according to claim 1, wherein each of the positioning structures comprises a base, a pin and an abutment, the pins connect the base and the abutment, and the pins are sandwiched between the corresponding Between the notch of the light guide plate and the notch of the frame body, the base portion and the abutting portion abut against the corresponding light guide plate and the frame body respectively. 3. The backlight module according to claim 2, wherein the abutting portion is a cone. 4. The backlight module according to claim 1, wherein the light guide plate comprises a light-emitting surface, and the insertion direction of the plurality of positioning structures is perpendicular to the light-emitting surface. 5. The backlight module according to claim 1, wherein the plurality of frame notches are semicircular holes. 6. The backlight module according to claim 1, wherein the plurality of notches in the light guide plate are semicircular holes. 7. The backlight module according to claim 1, further comprising a light source, wherein the outer edge includes a light incident surface and a plurality of constraining sides, the light incident surface corresponds to the light source, and the plurality of constraining sides Two notches of the light guide plate are respectively formed on the plurality of constraining sides. 8. A display, characterized in that it comprises: Backlight module, including: The frame body includes an inner side wall and a plurality of frame body notches, wherein the plurality of frame body notches are formed on the inner side wall; The light guide plate includes an outer edge and a plurality of light guide plate notches, wherein the plurality of light guide plate notches are formed on the outer edge, and the plurality of light guide plate notches respectively correspond to the plurality of frame body notches; and A plurality of positioning structures are respectively sandwiched between the plurality of notches of the light guide plate and the plurality of notches of the frame body, wherein the plurality of positioning structures abut against and constrain the degree of freedom of the light guide plate; A liquid crystal panel is arranged on the backlight module; and The outer frame fixes the liquid crystal panel and the backlight module. 9. The display according to claim 8, wherein the light guide plate includes a light-emitting surface, and the insertion direction of the plurality of positioning structures is perpendicular to the light-emitting surface. 10. A backlight module, characterized by comprising: The frame includes an inner side wall, a first frame notch and a second frame notch, wherein the first frame notch and the second frame notch are formed on the inner side wall; The light guide plate includes an outer edge, a notch of the first light guide plate and a notch of the second light guide plate, wherein the notch of the first light guide plate and the notch of the second light guide plate are formed on the outer edge, and the notch of the first light guide plate The notch corresponds to the notch of the first frame, and the notch of the second light guide plate corresponds to the notch of the second frame; The first positioning structure is sandwiched between the notch of the first light guide plate and the notch of the first frame body; and The second positioning structure is interposed between the notch of the second light guide plate and the notch of the second frame body, wherein the first positioning structure and the second positioning structure abut to restrict the freedom of the light guide plate. Spend. 11. The backlight module according to claim 10, wherein the first positioning structure comprises a first base, a first pin and a first abutting part, and the first pin connects the first base and the The first abutting part, the first pin is sandwiched between the notch of the first light guide plate and the notch of the first frame body, the first base and the first abutting part respectively abut against the light guide plate and the frame. 12. The backlight module according to claim 11, wherein the second positioning structure comprises a second base, a second pin and a second abutment, and the second pin connects the second base and the The second abutting part, the second pin is interposed between the notch of the second light guide plate and the second frame body, the second base and the second abutting part respectively abut against the light guide plate and the frame. 13. The backlight module according to claim 10, wherein the outer edge of the light guide plate includes a first side and a second side, and the notch of the first light guide plate is located on the first side, so The notch of the second light guide plate is located on the second side, and the first side is parallel to the second side. 14. The backlight module according to claim 10, wherein the outer edge of the light guide plate comprises a first side and a second side, and the notch of the first light guide plate is located on the first side, so The notch of the second light guide plate is located on the second side, and the first side is perpendicular to the second side. 15. The backlight module according to claim 10, wherein the frame is made of plastic or other polymeric materials. 16. The backlight module according to claim 10, wherein the material of the first positioning structure and the second positioning structure is plastic or other polymeric materials.

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