TWI241442B - Backlight module, liquid crystal display, and assembly method of backlight module - Google Patents

Backlight module, liquid crystal display, and assembly method of backlight module Download PDF

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Publication number
TWI241442B
TWI241442B TW93126967A TW93126967A TWI241442B TW I241442 B TWI241442 B TW I241442B TW 93126967 A TW93126967 A TW 93126967A TW 93126967 A TW93126967 A TW 93126967A TW I241442 B TWI241442 B TW I241442B
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TW
Taiwan
Prior art keywords
item
backlight module
box
bearing
liquid crystal
Prior art date
Application number
TW93126967A
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Chinese (zh)
Other versions
TW200609601A (en
Inventor
Feng-Chan Lin
Original Assignee
Chi Mei Optoelectronics Corp
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Priority to TW93126967A priority Critical patent/TWI241442B/en
Application granted granted Critical
Publication of TWI241442B publication Critical patent/TWI241442B/en
Publication of TW200609601A publication Critical patent/TW200609601A/en

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Abstract

A backlight module of a liquid crystal display and an assembly method thereof are provided. The backlight module comprises a housing and a diffusion plate, wherein the inside wall of the housing is formed a stair structure for providing a carrying surface. A plurality of supporting ends is provided above the carrying surface, and a plurality of elastic components is provided between the carrying surface and the supporting ends. The diffusion plate is disposed on the carrying surface; wherein the opposite edges of the diffusion plate located between the carrying surface and the supporting ends lean against the elastic components. The backlight module has high reliability and contributes lower producing time and cost.

Description

1241442 14088twf.doc IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to: a light source module and an assembling method thereof, and in particular to a backlight module of a liquid crystal display and an assembling method thereof . [Previous Technology] With the rapid advancement of computer technology and the high development of the Internet and multimedia technology, the transfer of video education has mostly changed from analog to digital transmission, which has been developed in conjunction with optoelectronic technology and semiconductor manufacturing technology. Flat panel displays, such as liquid crystal displays (LCD), organic electroluminescence displays (OLED display, OLED) or plasma display panels (PDP), have gradually become The mainstream of display products. As for the liquid crystal display, depending on the light source utilization type, it can be divided into three types: reflective liquid crystal display (Reflective LCD), transmissive liquid crystal display (Transmissive LCD) and transflective liquid crystal display. Taking a transmissive or transflective liquid crystal display as an example, it is mainly composed of a liquid crystal panel and a backlight module. The liquid crystal panel is composed of two transparent substrates and one transparent substrate. The backlight module is used to provide the surface light source required by the liquid crystal panel, so that the liquid crystal display achieves the display effect. Backlight modules are generally divided into two types: side-light type and direct-type. The direct-type backlight module does not need to be equipped with a light guide plate, and the light source is arranged directly below the liquid crystal panel 'in order to directly provide the surface light source required by the liquid crystal panel. Therefore, when there is a high demand for the brightness of the light source of the display, a direct-type back 1241442 14088twf.doc light module is usually used. The surface light source provided by the direct type backlight module is composed of two ways. One of them is an array of multiple light emitting diodes, and the other is by an array of light emitting diodes. Cold Cathode Fluorescent Lamps (CCFL) are arranged parallel to each other. Please refer to FIGS. 1A and IB, where FIG. Α is a top view of a conventional direct type backlight module, and FIG. 1B is a cross-sectional view of the backlight module. The backlight module 100 has a light box 110 and a plurality of fluorescent tubes 120 arranged at the bottom 110a of the light box. In order to improve the uniformity of light output, a diffuser plate 13 is usually arranged at the opening 110b of the light box 110. In addition, the light box 110 and the diffusion plate 130 are formed with positioning structures such as a positioning groove Π2 and a positioning lug 132 to assist the positioning of the diffusion plate 130 by the combination of the positioning groove and the positioning lug 132. In addition, since the diffuser plate 13 is easily heated by external moisture or the fluorescent tube 120 below, and it expands and deforms, it is common practice to leave a gap 150 between the diffuser plate 130 and the light box 110 to avoid After the expansion plate 130 is expanded, it is squeezed to the light box 110 ′, which deforms the entire diffusion plate 130, and pushes the liquid crystal panel above, which causes the display quality to be damaged. However, the above-mentioned gap 150 also relatively makes it impossible for the diffuser plate 130 and the light box 110 to closely cooperate. Therefore, after the diffuser plate 13 and the light box 110 are assembled, the diffuser plate 130 may be shaken due to external forces and the diffuser plate 130 and the light box 110 collide with each other to generate a strange sound, and the diffuser plate 130 and the light box 110 may also be worn or damaged as a result. In addition, since the positioning structure needs to be formed on the diffuser plate 130, when cutting a large plate material 1241442 14088twf.doc into the diffuser plate 130, a part of the area will be wasted to make the positioning structure, thereby increasing the manufacturing cost. In addition, when assembling the diffuser plate 13 and the light box 11, it is necessary to align the positioning structures such as the positioning groove U2 and the positioning lug 132, so it is inconvenient to assemble. [Summary of the Invention]
In view of this, the object of the present invention is to provide a highly reliable backlight module and liquid crystal display, which can effectively fix the position of the diffuser plate, and can provide an appropriate buffer against the expansion that may occur in the expansion board. W Another object of the present invention is to provide a relatively simple method for assembling a backlight module, which can reduce the time required for assembling, thereby reducing the assembly cost and improving the overall productivity. -The present invention proposes a backlight module, which includes a box. For example, the 'box' has a step-like structure, with the inner wall above the two feet having a plurality of alternative ends protruding, and the supporting surface is provided with a plurality of elastic members between the support & In the above, the diffuser plate is located between the opposite side edges between the bearing surface and the supporting end, and bears the elastic member. The present invention further proposes a liquid crystal display including an upper and a liquid crystal display panel, wherein the liquid crystal An example of the display panel system configuration is described in the second example of the above-mentioned backlight module and liquid crystal display. For example, it includes at least -secret, which is configured to: use to fix the diffuser plate and limit its normal line along the mounting surface. 2 1241442 i4088twf.doc indicators such as the backlight module and the LCD display film outer edge system and the normal line of the light-carrying surface E-learning film, and restrict the two along the spear In the example, 'the above-mentioned backlight module and liquid crystal display light source are arranged in a box and are located in the = row. In addition :, == fluorescent: the board is assembled on a box', where the box: of ::: such as 3 :: Two structures to provide a bearing surface 'and the inner wall above the bearing surface has a convex 2 There are a plurality of bullets ^ Niu Baixian between the two sides-insert the scales of the diffuser plate on the bearing surface = between: then: 'Rotate the diffuser plate downward with the first side edge as the fulcrum to below the bearing end. After that, lift Apply force to reverse the elastic member by the elastic member ^ = the diffuser plate, and make the -second side edge of the diffuser plate into the other-the alternative of the side = in a preferred embodiment of the present invention 'the above-mentioned backlight module After assembling the diffuser plate to the box, 'for example, it can be configured ^ 1241242 14088twf.doc The diffuser plate and the periphery of the box are used to fix the diffuser plate and limit /, ~ the normal direction of the bearing surface In a preferred embodiment of the invention, after the assembly of the above-mentioned backlight module is also assembled on the box, for example, it further includes a configuration 1: to the expansion board, and the outer edge of the optical film. It is located between the end of the elastic support and the toilet. In addition, after the optical film is arranged on the diffuser plate, it can be arranged at least-Wei on the periphery of the diffuser plate, the optical diaphragm and the box, to fix the diffuser plate and the optical Then, it is related to the displacement of the two along the normal direction of the bearing surface. In a preferred embodiment, the above-mentioned method for assembling the backlight module before assembling the diffuser plate on the cabinet further includes, for example, arranging one in the cabinet. As above, the backlight module and the liquid crystal display of the present invention are as described above. A plurality of elastic members are arranged between the diffuser plate and the box body, which can not only fix the diffuser plate, avoid collision between the expansion plate and the box body due to left and right shaking, but also provide effective expansion of the diffuser plate after heating or damp. In addition, the method of assembling the backlight module proposed by the present invention can provide a relatively simple assembly process, and does not require additional processing of the diffuser plate or the case to form a positioning structure, thereby helping to reduce manufacturing costs. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the preferred embodiments are described below in detail with the accompanying drawings as follows. [Embodiment] Please refer to FIGS. 2A and 2B, where FIG. 2A shows that one of the present invention is better than 9 1241442 14088twf.doc — a partial top view of a backlight module®, and @ 2B is shown as the backlight module Partial cross-sectional view. The backlight module 2000 has a light box 2 and a lamp, and the bottom 21a is configured with a light source 22o, for example, a cold-cathode camping light officer or a light-emitting diode array. In addition, the light box The inner wall 212 of 21 is a stepped structure, for example, it has a bearing surface 212a, and the inner wall 212 above the bearing surface 212a has a plurality of flat plate-shaped support ends 214 protruding, and the surface load surface 2112a and the support end 2 丨 4 A plurality of elastic members are arranged between them. In this embodiment, the elastic member 216 is, for example, a plate-shaped elastic piece integrally provided on the light phase 210, but in other embodiments, it may be independent. The component can be other elastic structures or elastic materials with buffer function, and various implementations of this elastic member will be described below. Μ Referring to FIGS. 2A and 2B again, the opening 2i0b of the light box 210 is configured. A diffuser plate 230 On the surface 212a, the opposite sides of the diffuser plate 23 are located between the corresponding bearing surface 212a and the support end 214, and bear on the elastic member 216. The diffuser plate can be fixed by the spring force of the elastic member 216. 230, and provides a buffer function when the diffuser plate 230 is shaken by external force or expands and deforms due to heat and moisture, and can avoid damage caused by the diffuser plate 230 directly colliding with the light box 210, and can also effectively reduce the generation of abnormal noise. In addition, in a preferred embodiment, for example, an optical film 240 may be further disposed on the diffusion plate 230. The optical film 240 is, for example, a diffusion film, and both edges of the optical film 24 are inserted into the support end 214 and the elastic member, respectively. Between 216. In addition, the periphery of the optical film 240 can be configured with a bead 25 °, for example, the optical film 240 is fixed, the diffusion plate 230 is connected to the bead 250 and the box 210 1244242 14088twf.doc
The light sheet 240 and the diffuser plate 230 are restricted from being displaced in the direction of the & normal 'to prevent the optical film 24G from coming off. # 八 ^^ !! is '73 /, a support end 214 on the opposite sides of the light box 21 shown in FIG. 28, but these support ends 214 on both sides of other implementations of the present invention may be- Body molding strip: structure, referring to FIG. 2C, which shows a partial top view of a backlight module of a preferred embodiment of the present invention, and this embodiment represents the same component as that of FIG. 2A with the same label. As shown in FIG. 2C, the inner wall 212 on both sides of the light box 21 is provided with a strip-shaped support end 214, and each support end = 14, for example, has a plurality of openings 214 corresponding to the elastic member 216, which are exposed. ^ The elastic member 216 is used to observe whether the diffusion plate 23G and the optical film 240 are well configured. In addition, since the other components of this embodiment are similar to the above-mentioned embodiment, the related structure and configuration relationship please refer to the description of FIG. 2A, and will not be repeated here. Please refer to FIGS. 3A to 3D, which respectively show schematic diagrams of various other implementations of the elastic member in the backlight module of the present invention. The dotted line _ represents the structural change caused by the diffuser plate pushing the elastic member. The elastic member 216 shown in FIG. 3A is a polygon. Of course, in other embodiments, the elastic member may be circular or other closed shape. In addition, as shown in Figs. 3B and 3C, the elastic members 216 are sheet-shaped, in which the elastic members 216 in Fig. 3B are arc-shaped, and the elastic members 216 shown in Fig. 3C are continuously bent. In addition, the elastic member 216 shown in FIG. 3D is independent of a component of the light box, for example, it is in the shape of a folded plate. One end of the elastic member 216 is clamped in the inner wall 212 of the light box 11 1241442 14088twf.doc 210, and The other end of the elastic member 216 bears on a side edge of the diffuser plate 230. Referring to FIG. 4, a partial cross-sectional view of a liquid crystal display according to a preferred embodiment of the present invention is shown. As shown in FIG. 4, the liquid crystal display 400 includes, for example, the above-mentioned backlight module 2000 and a liquid crystal display panel 300, wherein the liquid crystal display panel 300 is disposed on the supporting end 214 of the backlight module 200. The light emitted by the light source 220 at the bottom 210a of the light box can reach the upper liquid crystal display panel 300 through the diffusion plate 230 and the diffusion sheet 240 for display of the liquid crystal display panel 300. φ In order to explain the features of the present invention in detail, a method for assembling the above-mentioned backlight module is described below. 5A to 5E sequentially illustrate a method for assembling a backlight module according to the present invention, wherein the method is applicable to the backlight module of the above embodiment. First, as shown in FIG. 5A, a light box 210 is provided, and the bottom of the light box 210a has been configured with a light source 220, for example, and one side edge 23a of the diffuser plate 230 is inserted between the bearing surface 212a and the support end 214. Next, as shown in FIG. 5B, the diffuser plate 230 is rotated downward with the side edge 230a as a fulcrum to place the diffuser plate 230 on the bearing surface 212a. At the same time, the diffuser plate 230 is pushed upward to force the side edge 230a to push the corresponding elastic member 216 under the support end 214. Then, as shown in FIG. 5C, the force applied to the diffuser plate 230 is released to push the diffuser plate 230 by the rebound force of the elastic member 216, so that the other edge 230b of the diffuser plate 230 enters the support end 214 on the other side Underneath, and bearing on another elastic member 216, the assembly of the diffuser plate 23 is completed. After 12 1241442 14088twf.doc, as shown in FIG. 5D, an optical film 240 (such as a diffusion film) can be selectively disposed on the diffusion plate 23o, where the optical film 24o is flexible, so the optical film is being assembled. In the case of the sheet 240, it is only necessary to insert the opposite ends of the optical film sheet 24 between the corresponding elastic member 216 and the supporting end 214. Next, as shown in FIG. 5E, a bead 25o is arranged above the diffusion sheet 24o, wherein the bead 25 (the H row is such as a locking optical film and a diffusion plate 23o is disposed between the godet 250 and the light box 210 for fixing The optical diaphragm 24o and the diffuser 230 'limit the displacement of the two along the normal direction of the bearing surface 212a. It is worth noting that' if you choose not to configure the silk diaphragm 24o in the above steps, the bead 250 is directly The Ling diffuser plate 23 is configured. In summary, the method of assembling the backlight module, the liquid crystal display, and the backlight unit of the present invention is to design a flexible structure on the inner wall of the button to provide fixing and buffering for the diffuser plate at the same time. Features and advantages of the column · On the 8th day of the week, there is a function of fixing and stress buffering provided by the elastic mechanism. Therefore, the bad 1 $ is free of possible noise or the diffusion plate due to impact. The loss of 7 w β absorbs the expansion of the diffusion plate and reduces the occurrence of warping and deformation, so it has better reliability. The rectangular diffusion plate after fast cutting for optical use, and the rectangular processing is not necessary. , Optical diaphragm or light box The J structure of the province can increase the cutting rate of the plate, thereby saving labor and cost. (-), And the installation method is simple, and there is no need for an assembly reference point or positioning structure 13 1241442 14088twf. doc is aligned, which can effectively shorten the overall high productivity of the backlight module.] Furthermore, although the present invention has been disclosed as above with a preferred embodiment, 鈇: determine the present invention, anyone skilled in this art will not leave: Day: =, Within: When some changes can be made, so this issue date ^^ Qianwei Dang will be determined by the scope of the attached patent application. /, &Quot; 蒦 [Schematic description of the diagram] Figure 1A is a top view of a conventional direct type backlight module. 1B is a cross-sectional view of the backlight module of FIG. ^. Θ FIG. 2A is a partial top view of a preferred embodiment of the present invention. Fig. 2B is a partial cross-sectional view of the backlight module of Fig. 2A. Fig. 2C is a partial top view of another preferred embodiment of the present invention.
The 3D pieces are not shown in the backlight molds and groups of the present invention, and other various embodiments of the elastic members. The elasticity of the invention is the preferred embodiment of the present invention-a liquid crystal display method that changes the shape of the sun according to the essence-a kind of skirt of the back button group [Key component symbol description] 10 (): backlight module 110: light box 110a: Bottom of the light box 14 1241442 14088twf.doc 110b ·· Opening 112: positioning groove 120: fluorescent tube 130: diffuser 132: positioning lug 150: gap 200: backlight module 210 · light box 210a: light box bottom 210b: opening 212 : Inner wall, 212a: Carrying surface 214: Supporting end 214a: Opening 216: Elastic member 220: Light source 230: Diffusion plate 240 · Optical film 250: Bead 300 · LCD display panel 400 · LCD display

Claims (1)

1241442 14088twf.doc X. Scope of patent application Upper: A backlight module, including a bearing surface, and the IS ::::: has a stepped structure to provide parts; An elastic diffuser plate is arranged on the moxibustion moxibustion :: margin system is located on the bearing surface and the readings: the i = :: 少-条条, which ::::::: The light module described above includes more Today, the Husong bulkhead and the periphery of the box are used to fix the displacement in the normal direction of the bearing surface. The backlight module described in item 1 of the less one optical film monthly special, further includes the elastic member 2 located on the outer edge to the outer edge, and the Qin periphery of the optical diaphragm is used for fixing; the expansion board, the The normal direction of the optical film and the bearing surface of the box is the optical film, and the two are limited along the backlight module described in the first patent scope, and includes-= source '/, middle The light source is arranged in the box and is located under the diffuser = the backlight module as described in item 5 of the scope of patent application, wherein the light source includes a cold cathode # 光 灯 t and a light emitting diode_two of them . 16 1241442 14088twf.doc Elasticity == the backlight module described in the item, where these elasticity == the backlight module described in item 1, where the -box = 'Medium light =: installation method, suitable for -The diffusion plate group Xiangzhi = 1, the inner wall of the Zhongzhi eye body has a stepped structure to provide a bearing surface 'and the inner wall end of the bearing surface is cut', and the bearing surface and the #. 心 ㈣ 秘 1u 又The pieces of the backlight module are provided with a plurality of elasticity between the two sides \ packages and brackets. The side edges are inserted between the bearing surface and the part: the two-side edges are pivoted downwards. Diffusion plate to the bearing surface ^ 'and put the force below the relatively supporting end of the -_ Zhuan Qisu part; and trembling and enter the release force to read from the character; and make the diffusion plate -The second side edge enters below the other-side support end. The knives are supported by the backlight mold method described in item u of the scope of the patent application, in which the diffusion plate is assembled to the box. At least-beading between the diffusion plate and the box. The periphery is used to fix the diffuser 17 1241442 14088twf.doc and limit its displacement along the normal direction of the bearing surface. 13. The method of carrying money as described in item 11 of the patent scope of the cap, wherein after assembling the diffuser plate to the box, it further comprises ^-an optical film to the diffuser plate, and the light Lying piece = between the elastic member and the supporting end. The backlight module described in item 14. of the scope of application for patents, after arranging the optical film on the diffusion plate, is more inclusive. ≫ -Beading on the diffusion plate, the optical film Of the film and the box
=== The Gamma, and the one along the bearing surface = the backlight mold method described in item u of the scope of the patent application, where before the diffuser is saved on the box = a light source in the box Inside. Has been configured 16 · — a type of LCD display, including: a backlight module, including ··
Provided with-step-like structure, with a number of support center = the surface above the load surface has a plurality of protruding pieces; ~ between the load surface and the support ends are arranged by the elastic members; to; ; Between the bearing surface and the support ends, and the display panel is arranged on the support ends. The liquid crystal display as described in item 16 of the scope of patent application, 18 1241442 14088twf.doc includes at least-bead, which is arranged on the diffuser plate and the box to fix the diffuser plate, and restrict the method along the bearing surface Line direction U shift 0 18. The LCD display described in item 16 of the scope of patent application is at least-optical, it is arranged on the diffuser plate, and the outer edge of the sheet is located on the elastic member and the support. Between ends. 19. The liquid crystal display as described in item 18 of the scope of patent application, including at least-beading, which is arranged on the diffuser plate, the optics spot the periphery of the box, and the diffuser plate and the optics are defined by And limit the displacement along the normal direction of the bearing surface. 20. The liquid crystal display according to item 16 of the stated patent patent group, further comprising a light source, the light source being disposed in the cabinet and located below the diffuser plate. Yueyou 21. The liquid crystal display according to item 20 of the patent application scope, wherein the light source includes two of a cold cathode fluorescent lamp tube and a light emitting diode array. 22. The liquid crystal display as described in item 16 of the patent application, wherein the elastic members are integrally formed with the box system. 〃23. According to the liquid crystal display described in item 16 of the patent application scope, the supporting end of the JL is flat. 24. The liquid crystal display according to item 16 of the scope of patent application, wherein the elastic members include plate-shaped elastic pieces. 25. The liquid crystal display as described in the item% of the scope of patent application, wherein the optical film in i includes a diffusion sheet. 〃
TW93126967A 2004-09-07 2004-09-07 Backlight module, liquid crystal display, and assembly method of backlight module TWI241442B (en)

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Application Number Priority Date Filing Date Title
TW93126967A TWI241442B (en) 2004-09-07 2004-09-07 Backlight module, liquid crystal display, and assembly method of backlight module

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TW200609601A TW200609601A (en) 2006-03-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100434984C (en) * 2007-01-18 2008-11-19 友达光电股份有限公司 Diaphragm suspension system and its used diaphragm suspension device
US7481569B2 (en) 2005-12-07 2009-01-27 Hon Hai Precision Industry Co., Ltd. Direct type backlight module

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7481569B2 (en) 2005-12-07 2009-01-27 Hon Hai Precision Industry Co., Ltd. Direct type backlight module
CN100434984C (en) * 2007-01-18 2008-11-19 友达光电股份有限公司 Diaphragm suspension system and its used diaphragm suspension device

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