WO2005091696A1 - A frame structure for backlight module - Google Patents

Abstract

A frame structure for backlight module mainly comprises an upper fixing frame and a lower fixing frame . The backlight module components which include a linear light source, a light source holder, a light-guide plate, a upper diffusing plate, a light eflecting plate, a lower diffusing plate and a light-enhancing film and the like, can be fixed and positioned well by incorporating a T -type hook fixing element of the upper fixing frame with a groove element of the lower fixing frame which engages into the T-type hook

Description

 TECHNICAL FIELD The present invention relates to a frame structure for a backlight module, and more particularly to a frame structure for fixing a backlight module of a liquid crystal display. Background technique

 At present, liquid crystal displays are quite popular in current information or home appliance products, and because of their advantages of lower price and mature manufacturing technology, they are widely loved by consumers.

The display mode of the liquid crystal display is a passive mode, that is, its display must be illuminated by the light source of the backlight module. For this reason, a general liquid crystal display usually has a backlight module. The liquid crystal display is formed with a very complicated and cumbersome structure. As shown in FIG. 1, a metal outer frame 5 or a plastic upper frame 1 (Upper Frame) and a metal or plastic frame are usually added. The lower fixed frame 2 (Lower Frame) combines the liquid crystal panel 4 and the backlight module assembly, including a linear light source 6, a light source holder 9, a light guide plate 12, an upper diffuser plate 13, a light-enhancing film 14, a reflective plate 15, and a lower diffuser plate 16. After the whole is covered, the fixing frame used for covering the backlight module and the liquid crystal panel, including the metal outer frame 5, the upper fixing frame 1 and the lower fixing frame 2, etc., must have a good fixing function and convenience of combination. For example, the lower fixing frame 2 may be provided with a pin 11 to pass through the positioning holes 17 formed in the upper fixing frame 1, the light guide plate 12, the upper diffusion plate 13, the light enhancement film 14, the reflection plate 15, and the lower diffusion plate 16. . In addition, in the backlight module device disclosed in US Patent No. 5729310, the following form is adopted in the backlight module fixing frame portion: The fixing structure (fitting piece) of the upper fixing frame made of plastic is a straight hook 3 (see FIG. 1) ), And the structure of the lower fixing frame and the inline hook structure (fitting piece) of the upper fixing frame are corresponding groove structures 10 (see FIG. 1), so that the backlight module can be fixed well. But the fixed knot of this zigzag hook The structure will leave a certain gap for the convenience of combination, so it will lose a good fixed function.

 In addition, as shown in FIG. 2, the current backlight module uses an upper fixing frame A and a lower fixing frame B to combine the backlight module components together. Wherein, a plurality of mouth-shaped fastening elements a are arranged on the edge of the upper fixing frame A, and are provided to be fixed to each other with the buckle fastening elements b provided on the periphery of the lower fixing frame B. However, due to the convenience of assembly, as shown in FIG. 3, the mouth-shaped fastening element a and the convex fastening element b also have a certain gap 0, which makes the fixed effect discounted.

 Therefore, no matter whether it is a straight hook structure or a rectangular hook structure, the limiting direction can only be limited in the up and down direction, and the left and right directions must be wide because of the convenience of combination, so it cannot be used. Make effective restrictions in left and right directions. Therefore, the current backlight module fixed frame structure does not provide an effective positioning function.

 In view of this, the present invention proposes a method that can solve the above problems. Summary of the invention

 The main object of the present invention is to provide a backlight module frame structure which can be positioned and fixed at the same time, so as to improve the good fixing function. A secondary object of the present invention is to provide a backlight module frame structure that can reduce the number of fixed card slots, thereby saving the weight and cost of the frame.

 In order to achieve the above object, a frame structure for a backlight module provided by the present invention includes: a lower fixing frame, which is a component carrying the backlight module; an upper fixing frame, arranged on the lower fixing frame, and fixed to the lower fixing frame; A frame is adapted to fix the backlight module member; wherein the upper fixed frame has a fitting element that simultaneously restricts lateral movement and restricted longitudinal movement, and the lower fixed frame has a corresponding fitting member that cooperates with the fitting element.

Utilizing the fit between the fitting element of the upper fixing frame and the fitting member of the lower fixing frame Role, can well fix and position the backlight module

 The foregoing objects, features, and advantages of the present invention will be more clearly understood through the following description and accompanying drawings.

 FIG. 1 is an exploded view showing the structure of a conventional prior art liquid crystal display; FIG. 2 is a schematic view showing the structure of an upper fixed frame and a lower fixed frame of a conventional conventional backlight module;

 3 is a schematic diagram showing a combination of an upper fixing frame and a lower fixing frame of a conventional existing backlight module;

 4 is an exploded view of a backlight module showing a new frame structure according to the present invention; FIG. 5 is a structural view showing a specific embodiment of an upper fixed frame and a lower fixed frame of the present invention; and

 FIG. 6 is a schematic view showing an upper fixed frame and a lower fixed frame combined according to the present invention. detailed description

First, see Figure 4. FIG. 4 is an exploded view showing a backlight module 20 using a new frame structure according to a preferred embodiment of the present invention. As shown in the figure, the backlight module is mainly fixed by a plastic upper fixing frame 21, an upper diffusion plate 22, a light enhancement film 23, a lower diffusion plate 24, a light guide plate 25, a light source group and a metal or plastic lower fixing The frame 26 is sequentially assembled from top to bottom; wherein the above-mentioned backlight module assembly is completely fixed by using an upper fixing frame and a lower fixing frame to achieve integration. The upper fixing frame has a fitting element that simultaneously restricts both lateral movement and restriction of longitudinal movement. The lower fixing frame has a corresponding fitting member that cooperates with the fitting element. The specific structure of the fitting element and the corresponding fitting member can be referred to the drawings. 5. FIG. 5 shows an upper fixing frame and a lower fixing frame of the present invention. A structural schematic view of the embodiment, in which there are a plurality of T-shaped hook elements 30 on the peripheral side of the upper fixing frame as fitting elements, and a groove 31 corresponding to the T-shaped hook element on the peripheral side of the lower fixing frame is used as Corresponds to the fitting member. By using the T-shaped hook element 30 of the upper fixing frame and the groove 31 of the lower fixing frame, the backlight module component can be precisely positioned and fixed.

FIG. 6 is a schematic structural view showing that the T-shaped hook element 30 of the upper fixing frame and the groove 31 of the lower fixing frame are fitted, as shown in the figure, the T-shaped hook element of the upper fixing frame can be easily fitted Into the groove of the lower fixing frame, and the interval after the fitting can be smaller than that in the prior art, so the restriction function is increased, compared with the prior art, the hook-shaped hook element or the straight-shaped hook element can only be used in As far as the vertical direction is fixed, the new frame structure of the present invention increases the function of fixing the left-right direction more than the existing technology. In the above, the groove element of the T-shaped hook element of the upper fixing frame and the lower fixing frame of the present invention can be fixed in the up-down direction and added the function of fixing in the left-right direction to achieve the purpose of precise positioning. In addition, since it has a function of precise positioning, the peripheral edge side of the upper fixing frame and the peripheral edge side of the lower fixing frame of the present invention do not need a plurality of fittings than the conventional technology to achieve the fixing purpose, so the new frame of the present invention The structure can reduce the number of fittings more than the prior art. And reducing the number of fittings can reduce the weight of the frame, and also reduce the cost of making the mold when the mold is opened. In addition, the temperature and injection speed during the actual injection molding are easier to control and saturate, resulting in manufacturing. The low defect rate can further reduce manufacturing costs. Obviously, the fitting element and the corresponding fitting member of the present invention are not limited to the T-shaped hook element and the groove element described above, but may also take other forms. For example, although not shown in the drawings, the fitting element may be a Y-shaped hook member provided on the periphery of the upper fixing frame, and the corresponding fitting member may be a member corresponding to the shape of the Y-shaped hook provided on the lower fixing frame. . Alternatively, the fitting member may be an arrow-shaped hook member provided on the periphery of the upper fixing frame, and the corresponding fitting member may be an arrow and a hook provided on the lower fixing frame. Head shape hook shape corresponding member.

 The new frame structure backlight module according to the present invention has at least the following advantages:

1. The backlight module of the present invention has better fixing means than the prior art, and can more stably combine the entire backlight module.

 2. The new frame structure of the present invention may have a lower manufacturing cost than the prior art. Although the present invention has been described in detail through the above specific preferred embodiments and the accompanying drawings, the disclosed specific embodiments are only used to illustrate the present invention, and are not intended to limit the scope of the present invention. Various changes and improvements made within the spirit and scope of the present invention belong to the scope of the present invention.

Claims

Rights request  1. A frame structure for a backlight module, comprising: a lower fixing frame, which is a component carrying the backlight module; 'an upper fixing frame, disposed on the lower fixing frame, and fixing the backlight in cooperation with the lower fixing frame A module member; wherein the upper fixed frame has a fitting element that simultaneously restricts lateral movement and restricted longitudinal movement, and the lower fixed frame has a corresponding fitting member that cooperates with the fitting element. 2. The frame structure according to claim 1, wherein the fitting element is a T-shaped hook member provided on a periphery of the upper fixing frame. 3. The frame structure according to claim 2, wherein the corresponding fitting member is a groove provided on the lower fixing frame. 4. The frame structure according to claim 1, wherein the fitting element is a Y-shaped hook member provided on a periphery of the upper fixing frame. 5. The frame structure according to claim 4, wherein the corresponding fitting member is a member corresponding to the shape of a Y-shaped hook provided on the lower fixing frame. 6. The frame structure according to claim 1, wherein the fitting member is an arrow-shaped hook member provided on a periphery of the upper fixing frame. 7. The frame structure according to claim 6, wherein the corresponding fitting member is a member corresponding to an arrow-shaped hook shape provided on the lower fixing frame.