TWI381211B - Bottom bezel of backlight module - Google Patents

Description

Backplane architecture of backlight module

The invention relates to a backboard applied to a backlight module, in particular to a backboard having a support frame.

Liquid crystal displays have the advantages of low power consumption, light weight, and thin thickness, and have been widely used in various electronic products. However, the liquid crystal itself does not emit light, and the liquid crystal display needs to display the image through an external light source, so the backlight module is an indispensable part of the liquid crystal display.

The backlight module is configured to arrange components such as a light source, a reflection sheet, and an optical film in a metal casing to protect and support the internal components of the backlight module by the strength of the overall metal casing.

The current metal backplane has only a few functional openings, the rest of which is made of a metal material, and the weight of the metal backplane will eventually increase the overall weight of the liquid crystal display. In addition to weight issues, current metal backsheets have disadvantages such as higher cost and less manufacturing process. In addition, when the metal back plate is applied to the backlight module, it is easy to cause the lamp to induce leakage current and reduce the overall luminous efficiency.

If the metal backplane removes a part of the area or even the majority of the bottom area, and directly assembles the backlight module with the metal backplane, the backlight module is insufficient in strength, and the backlight module is vulnerable to external forces. The deformation of the curve, or the hollow frame can not withstand the weight of the components in the backlight module, the assembly structure is not stable.

In view of the above, the present invention provides a backplane structure suitable for a backlight module, which is mainly fixed on a frame of a metal back frame by using a support frame, so as to support the frame to enhance the rigidity of the backboard, which has the advantages of reducing weight and reducing cost. And the advantages of greatly reducing the leakage current of the lamp tube are also relatively easy to manufacture.

The backplane structure of the backlight module of the present invention comprises at least a metal back frame and a first support frame. The first support frame is a structure having a closed cross section. The first support frame has at least two end portions which are respectively stacked and fixed on the metal back frame. Among them, the design of the metal back frame can not only reduce the overall weight of the display, but also avoid the induced leakage current generated by the metal material of the back plate due to the hollow design, thereby improving the luminous efficiency of the backlight module. The rigidity of the metal back frame can be increased by fixing the support frame to the metal back frame.

In order to make the above description of the present invention more comprehensible, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

The invention is a backplane structure of a backlight module, which is mainly used to fix the metal back frame of the backplane structure of the backlight module by using the support frame, thereby enhancing the rigidity of the backboard and reducing the weight of the backboard. The following is a preferred embodiment of the present invention to illustrate the contents and principles of the present invention.

Figure 1 is a perspective view and a partial enlarged view of the back plate of the present invention. As shown in FIG. 1, the back panel 10 of the present invention applied to a backlight module includes a metal back frame 100 and at least one support frame 200. In the preferred embodiment, the backplane 10 of the present invention is suitable for a direct type backlight module, but is not limited thereto, and can also be applied to a side-entry backlight module according to requirements. The metal back frame 100 can be a rectangular frame, and has two long bezels 110 and two short bezels 120 in parallel. This is only an example, and can be adjusted according to actual needs. For example, the four frames of the metal back frame 100 are equal in length. . Compared with the conventional backplane, the backplane 10 of the present invention removes most of the area of the original metal backplane to reduce the weight of the entire backlight module, and the support frame 200 is used to reinforce the strength and stability of the structure. Cost and effectiveness considerations.

The support frame 200 is a structure having a closed cross section. The support frame 200 has at least two end portions 200a and 200b which are respectively stacked and fixed on the frame of the metal back frame 100. As shown in the enlarged view of the area A in FIG. 1 , one end portion 200 a of the support frame 200 can be stacked by the locking screw hole 210 and fixed to the long frame 110 of the metal back frame 100 for adding metal. The rigidity of the back frame 100. The support frame 200 is located above the metal back frame 100. In detail, the support frame 200 is located above the metal back frame 100, that is, the support frame 200 and the metal back frame 100 are located on different planes, and the two ends of the support frame 200 are supported. The portions 200a and 200b are fixed to the metal back frame 100. In addition, the fixing manner of the metal back frame 100 and the support frame 200 can be joined by welding, riveting, integral molding, etc., in addition to the manner of screwing the locking screw holes 210 in the embodiment. It is not limited to the above-mentioned joining manner, and those skilled in the art can think about different joining methods. The material of the support frame of the present invention may be galvanized steel and aluminum, and the material may be adjusted according to actual needs, and the invention is not limited thereto.

In order to support the force consideration, the cross-section height of the support frame 200 is at least 1.5 times the thickness of the metal back frame 100 sheet metal, and the height of the cross-section of the support frame can also be adjusted according to actual needs. The cross section of the support frame 200 can be a hollow or solid structure; in the preferred embodiment, the cross section of the support frame 200 is a hollow structure, which can save material usage, reduce weight, and reduce cost. In addition, the support frame 200 has a closed cross-section, i.e., the edges of the cross-section are not open or uninterrupted to maintain rigidity and avoid the presence of fragile points. The support frame 200 can be provided with at least one spare screw hole 220 (as shown in the enlarged view of the area A in FIG. 1) for use or fixation for subsequent assembly of other components. The screw hole position is only an example, but The invention is not limited thereto, and the position of the screw hole and its size can be adjusted according to actual needs.

2A to 2D are schematic views showing the structure of the support frame of the present invention. As shown in the figure, the cross-sectional shape of the support frame 200 of the present invention is a geometric shape such as a rectangle, a circle, a triangle, a cross or a trapezoid (not shown), and the edge of the cross-section has no opening or interruption, that is, It is a closed cross section. This cross section can be solid or hollow. The rectangular shape and the trapezoidal shape are preferred embodiments, and the cross shape may be fixed to the liquid crystal display housing (not shown) by a snap-fit structure (not shown). The above is only an example, and the shape of the cross section of the support frame and the solid or hollow structure can be adjusted according to actual needs.

3A to 3J are schematic views of various embodiments of the support frame of the present invention fixed to the metal back frame. Referring to FIG. 3A and FIG. 3D to FIG. 3J, the structural type of the support frame 200 fixed to the metal back frame 100 includes a long rod type, an inverse S type, a cross type, a W type, an N type, and a V type. Various geometric patterns such as a type or an X shape, and at least two end portions of the support frame 200 are respectively stacked and fixed to the metal back frame 100. In addition, at least two ends of each of the support frames 200 can be respectively fixed to the two long frames of the metal back frame 100, or at least two end portions of the support frame 200 can be respectively fixed to one long frame of the metal back frame 100. With a short bezel, this can effectively increase the rigidity of the structure. The above is only an example. Different structural types can also be mixed and used. The structure type, number, arrangement or fixing position of the support frame can also be adjusted according to actual needs. For example, as shown in FIGS. 3A to 3C and 3J, the arrangement of the long-bar type support frame 200 fixed to the metal back frame 100 includes a single long rod, a double long rod parallel, and a four-cornered diagonal rod. Arrangement of oblique lines or combinations thereof. The above is only an example, and the arrangement or fixing position of the long rod type support frame can also be adjusted according to actual needs. In addition, referring to FIG. 3B, on the metal back frame 100, the two support frames 200 are of a long rod type structure and are parallel to each other, wherein one of the support frames 200 is fixed to the position of the metal back frame 100 and the center line of the metal back frame 100 (eg, The distance shown by the dashed line is 0.006 times to 0.38 times the length L of the metal back frame 100, however, the aforementioned distance can be adjusted according to actual needs.

According to the experimental data of the equivalent K value analyzed by the finite element method according to the present invention, it is known that the majority of the area in the middle of the metal backing plate is removed to leave a frame-like structure, and Two hollow support frames with closed cross-sections are used to reinforce the structural rigidity, which can increase the equivalent K value representing the structural rigidity to 2.5 times that of the original metal back plate.

Therefore, the backboard with the support frame of the invention can not only reduce the overall weight of the final display, but also avoid the leakage current generated by the backlight module due to the induction, thereby improving the luminous efficiency of the backlight module, especially the direct type. The backlight module has better utility. In addition, fixing the support frame to the metal back frame can increase the rigidity of the back plate.

While the present invention has been described above by way of example, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. Other different embodiments are contemplated, and the scope of the present invention is defined by the scope of the appended claims.

10. . . Backplane

100. . . Metal back frame

110. . . Long border

120. . . Short border

200. . . Support frame

200a, 200b. . . Ends

210. . . Locking screw hole

220. . . Spare screw hole

Figure 1 is a perspective view and a partial enlarged view of the back sheet of the present invention.

2A to 2D are schematic views showing the structure of the support frame of the present invention.

3A to 3J are schematic views of various embodiments of the support frame of the present invention fixed to the metal back frame.

10. . . Backplane

100. . . Metal back frame

110. . . Long border

120. . . Short border

200. . . Support frame

200a, 200b. . . Ends

210. . . Locking screw hole

220. . . Spare screw hole

Claims (15)

A backplane structure of a backlight module, comprising: at least one metal back frame integrally formed; and a first support frame having a closed cross section, the first support frame having at least two end portions, the two end portions are They are respectively stacked and fixed on the metal back frame. The backplane structure of claim 1, wherein the first support frame is located above the metal back frame. The backplane structure of claim 1, wherein the metal back frame and the first support frame are fixed by welding, riveting, screwing or integrally forming. The backplane structure of claim 1, wherein the first support frame has a hollow cross section. The backplane structure of claim 1, wherein the first support frame has a solid cross section. The backplane structure of claim 1, wherein the cross-section is in the shape of a rectangle, a circle, a triangle, a cross or a trapezoid. The backplane structure of claim 1, wherein the first support frame is provided with at least one spare screw hole. The backplane structure of claim 1, wherein the cross section has a height at least 1.5 times the thickness of the metal back frame. The backplane structure of claim 1, wherein the metal back frame has two long borders and two short borders. The backplane structure of claim 9, wherein the at least two ends of the first support frame are respectively fixed to the two long frames of the metal back frame. The backplane structure of claim 9, wherein the at least two ends of the first support frame are respectively fixed to one of the two long frames of the metal back frame and the two short frames. One. The backplane structure described in claim 1, wherein the structure of the first support frame is a long pole type, an inverse S type, a cross type, a W type, an N type, a V type or an X. Font type. The backplane structure as described in claim 19, wherein the long rod type is arranged as a single long rod, a double long rod parallel, a quadrangular oblique rod or a diagonal line type. The backplane structure of claim 1, further comprising a second support frame that is long rod-shaped and parallel to the first support frame. The backplane structure of claim 14, wherein the distance between the first support frame and the second support frame fixed to the metal back frame and the center line of the metal back frame is the metal back The length of the frame is 0.006 times to 0.38 times.