WO2005093499A1 - Backlight assembly with side frame and assembly method thereof - Google Patents

Abstract

The present invention relates to a backlight assembly with a side frame, which includes: a stacked assembly composed by stacking a support frame, a reflecting plate, and a light guide plate; a tubular light source assembly which is provided on the side of the light guide plate of the stacked assembly; optical films which are provided on the stacked assembly; and a frame, which has a groove for accommodating the tubular light source and fixing the stacked assembly. The present invention also relates to a method for assembling the backlight assembly with a side frame. The backlight assembly with a side frame according to the invention makes the structure design of whole backlight assembly more simple and the assembling of assembly easier and the structure more steady, and reduces the cost of the model.

Description

 Backlight assembly of side frame and assembling method thereof

[Technical Field]

 The present invention relates to a backlight assembly of a side frame, and in particular, to a stacking assembly composed of a supporting frame, a reflection plate, and a light guide plate, and a lamp tube assembly that are fixed by using a side frame having a groove for accommodating a lamp tube assembly. Backlight assembly. The invention also relates to a method for assembling the side frame backlight assembly.

【Background technique】

 With the rapid development of semiconductor technology, various electronic display devices are required to meet requirements such as light, thin, short, and small. In particular, flat display devices such as liquid crystal displays, plasma displays, etc., require high resolution, lightness, and thinness. Accordingly, the industry is committed to minimizing unnecessary assembly components.

 At present, liquid crystal display devices have been widely used in desktop computers and notebook computers. The liquid crystal display panel component and the backlight component constituting the liquid crystal display device are separately assembled by different assembling processes, and then these components are assembled with each other. As shown in FIG. 1, a conventional backlight assembly uses a one-piece upper frame A and a supporting frame B to combine elements of a liquid crystal display device, such as a reflection plate, a light guide plate, and a lamp tube assembly. Wherein, a plurality of engaging elements a are provided on the edge of the mouth-shaped upper frame A, and the engaging elements b provided on the periphery of the supporting frame B are clamped and fixed to each other. However, because the liquid crystal display device is particularly light and thin, the mouth-shaped upper frame must be made thinner, which makes the upper frame structure too soft, difficult to be injection-molded, the overall structure is more complicated, and the assembly is more complicated, which increases manufacturing costs. And the mouth-shaped upper frame is thin and soft, resulting in poor stability.

In addition, U.S. Patent 6,502,945B2 discloses a stacked backlight assembly and a method of assembling the same. The stacked backlight assembly disclosed in the patent includes a model frame, a reflection plate, a light guide plate placed on the reflection plate, a pair of lamp tubes placed on opposite sides of the light guide assembly, and a light guide placed on the light guide Diffuser and a pair of upper borders, the upper borders can cover the guide The edge of the light plate and the model frame can be fitted and fixed to each other.

 The U.S. patent mainly uses an L-shaped upper frame and a supporting frame as a supporting structure and is used to combine other components. However, because the upper frame is L-shaped, the overall structural design of the upper frame by fixing the upper frame and the supporting frame to each other is complicated.

 In addition, the structure disclosed in the US patent needs to be assembled from top to bottom during assembly, so the upper frame will hinder the operator's line of sight during assembly, and it is impossible to simultaneously check whether the lamp pipeline is displaced or damaged during assembly. Tested after assembly; resulting in reduced productivity. In addition, because the U-shaped upper frame is used in the U.S. patent, the rigidity of the upper frame must reach a certain level that can fix the entire component for the purpose of fixing. Therefore, the upper frame must also have a certain thickness and width, so that the liquid crystal display The visible area of the panel becomes smaller, or the width from the outer edge of the visible area to the outer contour of the liquid crystal display module is wider, so it cannot be narrowed.

 Based on the above-mentioned shortcomings of the prior art and in order to achieve a light, thin, and stable structure, the present inventors have extensively studied the structure of a liquid crystal display device, and thus completed the present invention.

[Summary of the Invention]

 The main object of the present invention is to provide a side frame backlight assembly which is easier to assemble and has a more stable structure.

 Another object of the present invention is to provide a side frame backlight assembly with a simplified structure and easier manufacturing. '

 In order to achieve the above object and other objects, the present invention provides a side frame backlight assembly, which includes a stack assembly composed of a supporting frame, a reflection plate, and a light guide plate; an optical film disposed on the stack assembly; A lamp tube assembly provided on the light guide plate side corresponding to the above-mentioned stacking assembly; and a side frame having a groove for accommodating the lamp assembly and a fixing device for fixing the above-mentioned stacking assembly, so as to fix the stacking assembly and communicate with the optical The diaphragm forms a backlight assembly.

According to the above object, the present invention further provides a method for assembling a side frame backlight assembly, The method comprises the following steps: setting a reflecting plate on a supporting frame provided with a fitting element on the surface; setting a light guide plate on the reflecting plate; setting a lamp tube assembly on the light guide plate side to form a stacking assembly; A groove for accommodating the light tube assembly and each having a side frame for fixing the stacking assembly is inserted into the stacking assembly corresponding to the light tube assembly and the whole stacking assembly is fixed by the fixing device; and finally, at least one optical is provided on the light guide plate The diaphragm completes the side frame backlight assembly.

 According to the above object, the present invention further provides a method for assembling a side frame backlight assembly, including the following steps: a reflection plate is disposed on a supporting frame provided with a fitting element on its surface; a light guide plate is disposed on the reflection plate A stacking assembly is formed; the light tube assembly is embedded in a side frame having a groove for accommodating the light tube assembly and having a fixing device for fixing the stacking assembly; and then using the side frame to insert the stacking assembly and the The fixing device fixes the entire stack assembly; finally, at least one optical film is disposed on the light guide plate to complete the backlight assembly.

[Brief description of the drawings]

 1 is an exploded view of an upper frame and a supporting frame of a conventional backlight assembly; FIG. 2 is an exploded view of a side frame backlight assembly of the present invention;

 3 is a schematic diagram of a specific example of a fixing device (referred to as a fitting element in this drawing) provided in a side frame backlight assembly according to the present invention;

 4 is a schematic diagram of another specific example of a fixing device (referred to as a fitting element in this drawing) provided in the side frame backlight assembly of the present invention; and

 FIG. 5 is a structural cross-sectional view of a side frame backlight assembly according to the present invention.

【detailed description】

According to the backlight assembly of the present invention, by designing a side frame assembled from the side, whether the lamp tube is fixed or damaged can be inspected at the same time during assembly, and the production yield can be improved. And because the side frame is designed to have a groove structure, even if it is made thinner Adequate fixing devices can be provided, thereby increasing the visible area of the liquid crystal panel.

 According to the backlight assembly of the present invention, a side frame form can provide a stronger assembly structure than the prior art, and the mold required for the side frame is smaller than the prior art, so the temperature and the injection speed during injection molding are easier. Control is also easier to saturate, resulting in a lower manufacturing defect rate, which in turn can reduce manufacturing costs.

 In addition, the backlight assembly of the present invention uses the side frame provided with a groove capable of accommodating the lamp tube assembly to fix the stacking assembly, and the entire backlight assembly can be more stably combined by the holding force of the groove and the fixing device.

 The fixing device in the side frame backlight assembly of the present invention may be an elastic holding force of the side frame or may be a fitting element. When the fixing device is a fitting element such as a groove and a hook, or a concave point and a convex point, another fitting element is provided on the surface of the supporting frame corresponding to the fitting element of the side frame The supporting frame is fixed to the side frame.

 The above and other objects of the present invention will become more apparent from the following detailed specific examples and detailed description of the accompanying drawings.

 Please refer to FIG. 2. FIG. 2 is an exploded view of a side frame backlight assembly according to the present invention, in which a fixing device on the side frame is described in the form of a hook. The side frame backlight assembly of the present invention is composed of a supporting frame 1, a reflection plate 2, a light guide plate 3, an optical film 4, a lamp tube assembly 5, and a groove having a recess for accommodating the lamp tube assembly 5 and a fixing device (in FIG. 2) The fitting element 61) is composed of a side frame 6. The supporting frame 1 has side walls 11 perpendicular to the bottom surface on both sides of the symmetry, and two grooves 12 are provided at both ends of the side wall for passing the lamp assembly wire 51 and the bottom surface of the supporting frame 1 is close to the side wall 11. There are one or more fitting elements 13 (see FIG. 3, the fixing device is a groove-shaped fitting element 13 that can be engaged with the hooks); the side of the side frame 6 corresponds to the A part of the fitting element 13 of the supporting frame 1 is further provided with one or more fitting elements 61 俾 for fitting and fixing with the supporting frame.

In combining the side frame backlight assembly of the present invention, firstly, the reflection plate 2 is disposed on the supporting frame 1, then the light guide plate 3 is disposed on the reflection plate 2, and then the lamp tube assemblies 5 are disposed on both sides of the light guide plate 3. After that, there will be a groove for receiving the lamp tube assembly 5 and The side frame 6 with the fitting element 61 faces the lamp tube assembly 5 with a groove and accommodates the lamp assembly. At the same time, the fitting frame 61 and the fitting element 13 of the supporting frame 1 are fitted to each other and the supporting frame 1 and the reflecting plate 2 are fixed. , The light guide plate 3 and the lamp tube assembly 5, and finally the optical film 4 is placed on the light guide plate 3 to complete the side frame backlight assembly of the present invention.

 In the above, the lamp tube assembly 5 can also be accommodated in the groove of the side frame 6 before using the fitting element 61 and the fitting element 13 of the supporting frame 1 to fit each other and fix the supporting frame 1 and the reflecting plate 2 , The light guide plate 3 and the lamp tube assembly 5, and finally the optical film 4 is placed on the light guide plate 3 to complete the side frame backlight assembly of the present invention.

 Please refer to FIG. 3. FIG. 3 is a schematic diagram of a specific example of a fitting element provided in a side frame and a supporting frame in a side frame backlight assembly according to the present invention. The fitting element 61 of the side frame 6 is a hook form. The fitting element 13 of the supporting frame 1 is in the form of a groove, and the side frame backlight assembly of the present invention is fitted and fixedly assembled by a hook method. However, in the present invention, the fitting element 61 of the side frame 6 may also be in the form of a groove. At this time, the fitting element 13 supporting the frame 1 is in the form of a hook.

 FIG. 4 is a schematic diagram of another specific example of a fitting element provided in the side frame backlight assembly of the present invention, wherein the fitting element 61 of the side frame 6 is a concave point, and the fitting element 13 of the supporting frame 1 is a convex point , The side frame backlight assembly of the present invention is fitted and fixed by means of bumps. Similarly, the fitting element 13 may be a concave point, and the fitting element 61 may be a convex point. In other words, the fitting elements 13 and 61 in the present invention are not limited to any form, as long as they can be fixed to each other by fitting.

 In the side frame backlight assembly of the present invention, the side frame having a groove capable of accommodating the lamp tube assembly may be U-shaped or C-shaped.

 In the side frame backlight assembly of the present invention, when the fixing device is a fitting element, the number of the fitting elements provided on the side frame and the supporting frame is not particularly limited, and may be one or more, as long as the fixed Just the purpose.

The material of the side frame and the supporting frame in the present invention is not limited, and may be a metal material or other non-metal material, as long as the prepared side frame and the supporting frame can be used in the present invention. It does not affect the required properties of the present invention.

 In the side frame backlight assembly of the present invention, the side frame can also be made of an elastic material, and the elasticity of the obtained side frame can be used to fit and fix the side frame backlight assembly of the present invention without using any fitting element.

 Finally, see Figure 5. 5 is a cross-sectional view of the structure of the side frame backlight assembly of the present invention after being combined with a liquid crystal panel; 1 is a supporting frame; 13 is a fitting element (that is, a fixing device); 2 is a reflective plate; 3 is a light guide component; Is an optical film; 5 is a lamp tube assembly; 6 is a side frame; 61 is a fitting element (that is, a fixing device); and 7 is a liquid crystal display panel.

 The lamp tube assembly used in the present invention is known to those skilled in the art. The lamp tube assembly usually has an outer lamp cover and a lamp tube. The outer lamp cover is coated with a reflective coating to reflect the light source emitted by the lamp tube. Increase the brightness. However, the present invention is not limited to any kind of lamp tube assembly, as long as a light source can be provided. In addition, the number of the lamp tube components in the side frame backlight assembly of the present invention may be one or more, and generally, two are provided on opposite sides of the light guide plate to provide an ideal light source.

 Furthermore, in the side frame backlight assembly of the present invention, the side frame may be one or more than two, preferably at least two to fix opposite sides of the stacking assembly.

 The optical film in the backlight assembly of the present invention generally refers to an optical film generally used in a liquid crystal display, and generally includes, a light collecting film, a light enhancing film, and the like. However, the present invention is not limited to these films, as long as it can be used for a liquid crystal display.

 In addition, the components of the backlight assembly referred to in the present invention, such as the reflection plate and the light guide plate, are all known in the technical field of the present invention, and therefore will not be described in detail herein.

 The present invention has been described in detail by the above-mentioned preferred specific examples and drawings, but the disclosed specific examples 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.

 [Illustration of drawing number]

1 Support frame 13 Fitting element (fixing device) Reflector 3 light guide

Optical diaphragm 5 lamp tube assembly

Side frame 61 Fitting element (fixing device) LCD panel

Claims

Rights request 1. A backlight assembly comprising-a stacking assembly composed of a supporting frame, a reflecting plate, and a light guide plate; an optical film disposed on the stacking assembly;  A lamp tube assembly provided on the light guide plate side corresponding to the above-mentioned stacking assembly; and a side frame having a groove for accommodating the lamp assembly and a fixing device capable of fixing the above-mentioned stacking assembly;  The side frame is used for fixing the stacking component by the fixing device and forming a backlight component with the optical film.  2. The backlight assembly according to claim 1, wherein: the side frame has a U-shaped configuration.  3. The backlight assembly according to claim 1, wherein: the side frame has a C-type configuration.  4. The backlight assembly according to claim 1, wherein: the fixing device of the side frame is a holding force inherent to the side frame.  5. The backlight assembly according to claim 1, wherein: the fixing device of the side frame is a fitting element.  6. The backlight assembly according to claim 5, wherein the fitting elements are each a hook and a groove.  The backlight assembly according to claim 5, wherein the fitting elements are each a convex point and a concave point.  The backlight assembly according to claim 5, wherein the number of the fitting elements is one or more.  9. The backlight assembly according to claim 1, wherein at least two of the lamp tube assemblies are disposed on opposite sides of the light guide plate. The backlight assembly according to claim 1, wherein: the side frame to It is less than two and is disposed on opposite sides of the stacked assembly having the lamp tube assembly.  11. A method for assembling a backlight assembly, comprising the following steps:  Setting a reflecting plate on the supporting frame;  Setting a light guide plate on the reflecting plate;  Arranging the lamp tube assembly on the light guide plate side to form a stacking assembly;  Inserting a side frame having a fixing device and having a groove for accommodating the light tube component into the stacking component corresponding to the light tube component and using the fixing device to fix the entire stacking component;  At least one optical film is disposed on the light guide plate to complete a side frame backlight assembly. 12. A method of assembling a backlight assembly, including the following steps:-setting a reflecting plate on a supporting frame;  Placing a light guide plate on the reflecting plate to form a stacked component;  Embed the lamp tube assembly in a side frame having a fixing device and a groove capable of receiving the lamp tube assembly;  Using the side frame to insert the stacking assembly and fixing the entire stacking assembly by the fixing device;  At least one optical film is disposed on the light guide plate to complete the backlight assembly.  13. The method according to claim 11 or 12, wherein: the side frame has a U-shaped configuration.  14. The method according to claim 11 or 12, wherein: the side frame has a C-type configuration.  15. The method according to claim 11 or 12, wherein: the fixing device of the side frame is a holding force inherent to the side frame.  16. The method according to claim 11 or 12, wherein: the fixing device of the side frame is a fitting element. The method of claim 16, wherein each of the fitting elements is a hook and a groove. 18. The method according to claim 16, wherein the fitting elements are each a convex point and a concave point.  The method according to claim 11 or 12, wherein the number of the fitting elements is more than one.  The method according to claim 11 or 12, characterized in that: at least two lamp tube components are disposed on opposite sides of the light guide plate.  21. The method according to claim 11 or 12, characterized in that: there are at least two side frames and are disposed on opposite sides of the stack assembly having the lamp tube assembly.