Back frame of backlight module and liquid crystal display device

Abstract

A back frame (10) for a backlight module (20) and a liquid crystal display device (30) thereof. The back frame (10) comprises a flat plate (11) of which the periphery comprises a plurality of groups of alternately adjacent first side edges (111) and second side edges (112); a group of first frames (12) which are formed by aluminium extrusion molding and arranged corresponding to the first side edges (111), wherein each of the first frames (12) is provided with a first frame body (121), the first frame body (121) is connected sideways to a first bearing part (122), the longitudinal length of the first bearing part (122) is less than that of the first frame body (121), the longitudinal length of the first bearing part (122) is equal to the length of each first side edge (111), and the first side edge (111) is connected to the first bearing part (122); and second frames (13) which are formed by aluminium extrusion molding and arranged corresponding to the second side edges (112), wherein each of the second frames (13) is provided with a second frame body (131), the second frame body (131) is connected sideways to a second bearing part (132), the longitudinal length of the second bearing part (132) is greater than the length of each second side edge (112), the second side edge (112) is connected to the second bearing part (132), and the longitudinal end surface of the second bearing part (132) is connected to the longitudinal end surface of the first bearing part (122).

Description

technical field [0001] The invention relates to a manufacturing process of a liquid crystal display device, in particular to a manufacturing process of a back frame structure of a large-size liquid crystal panel. Background technique [0002] In the prior art, a liquid crystal display device includes a front frame, a panel, and a backlight module, wherein the backlight module includes a back frame, a reflection sheet, a light guide plate, and a lamp group. [0003] Currently, there are various sizes of display panels on the market to meet people's different needs. For example, in the field of television, the size of LCD panels includes medium and large sizes of 31.5, 42, 46, 48 or 55 inches, and super-large sizes of 60, 67, 72, 84, 90 or even 110 inches. LCD panels are set with different back frame moulds. [0004] Small and medium-sized liquid crystal panels in the prior art generally adopt an integral back frame, which is usually produced by metal stamping or plastic inj...

AI Technical Summary

Problems solved by technology

[0004] Small and medium-sized liquid crystal panels in the prior art generally adopt an integral back frame, which is usually produced by metal stamping or plastic injection. The integral back frame needs to consume too much material, and the material cost is high.

In addition, large stamping equipment is required for the back frame of medium and large-sized LCD panels. The mold corresponding to the back frame is large in size and complex in structure, and the cost of the back frame mold is high.

[0005] Especially for ultra-large-sized LCD panels, such as panels larger than 100 inches, the same ultra-large-sized back frame is required. At present, the industry does not have such a large stamping equipment to produce such a large back frame, so the back frame needs to be processed. Split splicing

This requires corresponding multiple splicing pieces to be spliced ​​to assemble a large-size back frame, and more splicing pieces need to design different molds for production, resulting in increased manufacturing costs

Moreover, too many splicing parts will also cause problems such as insufficient splicing strength of the back frame and complicated assembly.

[0006] Therefore, in the production of medium and large size liquid crystal panels, especially super large size, to solve the problems of large number of molds required for large size back frames, high manufacturing costs, and complicated assembly, redesign a light-weight and structurally strong The required back frame structure has been an urgent task to be solved

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