TW201035637A - Liquid crystal display and backlight module thereof - Google Patents

Abstract

A backlight module including a back plate, a planar light source and a plurality of support pillars is provided. The planar light source is disposed above the back plate and has an electrode area and an electrode-free area surrounding thereof. The support pillar is disposed on the back plate for supporting the planar light source and being contacted with the electrode area. Because support pillars are disposed under the electrode area of the planar light source, crack of the planar light source can be avoided. Besides, by designing shape of the support pillars, contact area between the support pillar and the planar source can be reduced so as to decrease current leakage of the planar light source. A liquid crystal display having the backlight module is also provided.

Description

201035637

.MZ1TW 24349twf.d〇c/n VI. Description of the Invention: [Technical Field] The present invention relates to a backlight module, and more particularly to a backlight module capable of effectively supporting a planar light source And a liquid crystal display device (LiqUid Crystal Display, LCD) having the odd light module. Ο 【Prior Art】 With the rapid development of liquid crystal display panels, a variety of light sources have been introduced, such as Cath〇de c〇ld Flu〇rescent P (CCFL) light-emitting diodes. Array (Light Emitting Diode) and Planar Fluorescent Lamp, etc., in which the mercury-free characteristics of the planar light, and the better light-making efficiency provide the advantage of uniform surface light. Make the flat fluorescent has gradually become the mainstream of development.曰 曰 In general, a flat fluorescent lamp is a plasma illuminating element, mainly, second, a high voltage difference is applied between the book pole arrays to generate high-energy electrons, and the second impact is in the discharge chamber (5)-Chambe〇 ^ Mert gas 'to form a plasma of excited molecules, ions and electric external electrodes. After that, the plasma will emit purple and then the fluorescent powder coated in the flat (four) light lamp will be excited. The figure shows a schematic view of a conventional flat fluorescent filament. Please refer to I know that the planar firefly 100 has an electrode area m (electrode 201035637 ------*-MZlTW 24349twf.doc/n surface) and Lai electric 11G side material electrode area (10) coffee dirty I a rea The discharge of the electrode array (not edge:) in the electrode region nG is further described in 7R to excite the inert gas f(4) in the discharge chamber (tree) into a plasma. Therefore, if there is an object contact or sin in the electrode area UG, a leakage current is generated, and the flat (four) light lamp cannot be normally emitted. Therefore, when the flat fluorescent lamp 100 is installed in the backlight module, it is necessary to prevent the planar fluorescent lamp from leaking. ❹ Figure 2 depicts a schematic view of a backlight module having the planar fluorescent lamp of Figure 1. Referring to FIG. 2, the backlight module 200 includes a back plate 21A, a frame 22A, and a flat fluorescent lamp 100. The frame 220 is disposed on the back plate 21A, and the planar fluorescent lamp 100 is supported on the frame 220. Since the electrode region 110 of the planar glory lamp has an electrode array (not shown) located below the plane lamp 100 near the panel side, and the discharge effect of the electrode array is easily affected by the external conductor (such as the back plate 21 〇) The effect of the flat fluorescent lamp 100 must be separated by a suitable distance d from the backing plate 210. In this way, the flat fluorescent lamp 100 can only bear against the frame 220 by the electrodeless region 12〇. As a result, when the backlight module 2 is subjected to an impact from the outside, the stress is concentrated in the area of the circle A shown in Fig. 2, causing the flat fluorescent lamp 100 to be broken. Therefore, the function of the backlight module 200 will be invalidated. SUMMARY OF THE INVENTION In view of this, the present invention provides a backlight module capable of effectively supporting a planar light source 'and capable of reducing leakage of a planar light source and increasing the use of the backlight 4 201035637 ru / υ厶υ lOiVfZlTW 24349twfdoc / ri module life. The present invention provides a liquid crystal display, a group, a display quality of a liquid crystal display device and a light mode. The present invention provides a backlight module comprising a back plate and a plurality of support columns. a planar light source is disposed on the back panel / light

And the non-electrode region U 〇 竿 围绕 surrounding the electrode region, wherein the backlight module further includes a frame slant placed on the back plate, and the planar light source is supported on the frame. The column is further a right-side body of the above-mentioned module, and a recess is disposed in the body and has an opening facing the electrode region. In the embodiment of the present invention, each support 彺吏 of the backlight module includes a plurality of ribs ‘ disposed in a concave shape and connected to the body. In the present invention, the #板 has a bribe hole, and the upper branch includes a fitting member disposed at the bottom of the body, and the defeat member is embedded in the corresponding fitting hole. - In an embodiment of the invention, the above-mentioned boundary between the boundary of the groove and the boundary of the present 'is long. The length of the contact is, for example, not more than 3.5 mm. In one embodiment of the present invention, the cross-sectional shape of the body is one of a circle, a square, an ellipse, and a polygon. In one embodiment of the invention, the cross-sectional shape of the groove is one of a circular shape, a square shape, an elliptical shape, and a polygonal shape. 5 201035637 ru/v^xoMZlTW 24349twf.d〇c/n Yes ===: The arrangement of the above-mentioned pillars can be Shi Xi ^ The invention - the implementation of the above-mentioned battle _ material can be - Lingί Γ A liquid crystal display device, including a backlight module, is a day-to-day display panel. The backlight module comprises a back plate and a number of o o 2: support columns. The planar light source is disposed on the back plate, and the plane is surrounded by the -electrodeless region, and the upper portion of the column light module contacts the secret region. The liquid crystal display (four) plate is disposed in the embodiment, and the liquid crystal display device described above is further provided on the frame in the present invention. The struts include at least - the present: two concave _ upper::: 曰 display device per branch and has - facing the electrode area, the feeding is disposed in the body, supporting the real towel, each of the liquid crystal display devices Ϊΐ=ί Slotted towel and connected to the body. Holes, in each case, the above-mentioned backsheet has a plurality of funnels and the butterfly = should be:::: the member is placed at the bottom of the body, and the body's feeding boundary is, for example, not more than 3.5 mm. In this embodiment of the invention, the cross-sectional shape of the body is 6 201035637 r υ / υζ, υ ιυΜΖ 1TW 24349twf.doc/n is selected from the group consisting of a circle, a square, and an ellipse. One of the polygons. In an embodiment of the invention, the cross-sectional shape of the groove is one selected from the group consisting of a circle, a square, an expanded circle, and a polygon. In an embodiment of the invention, the support posts are arranged in an array or honeycomb arrangement. In an embodiment of the invention, the material of the support column may be a rubber.

In an embodiment of the invention, the planar light source comprises a cold cathode fluorescent flat lamp, an outer electrode fluorescent flat lamp, or an inner electrode fluorescent plane. In an embodiment of the invention, the liquid crystal display device is further A plurality of optical films are included, supported on the frame and located between the planar light source and the liquid crystal display panel. In an embodiment of the invention, the liquid crystal display device further includes a front frame covering the liquid crystal display panel and combined with the back plate.

In an embodiment of the present invention, the liquid crystal display device further includes a buffer pad disposed on the inner side of the front frame and located between the liquid crystal display surface and the optical film. The present invention causes the support column to be supported on the planar light source. The electrode area effectively supports the surface of the yang, and the county flat wire is broken by the shape design and material selection of the support column, so as to avoid the leakage phenomenon of the plane, so that the planar light source can provide a uniform surface light source. The liquid crystal display with the backing wire group can provide excellent, and the above-mentioned features and advantages of the present invention can be more clearly and easily, and the preferred embodiment can be described in detail with reference to the figure. [FIG. 3] FIG. 3 is a schematic diagram of a backlight module according to a preferred embodiment of the present invention. Referring to FIG. 3, the backlight module 300 includes a backplane 310, a planar light source 330, and a plurality of support pillars 340. The planar light source 330 is disposed on the backplate 330. The planar light source 330 has an electrode region 332 and an electrodeless region 334 surrounding the electrode region 332. The support post 340 is disposed on the back plate 310, and the support post 340 supports the planar light source 330 and contacts the electrode region 332.

The backlight module 300 may further include a frame 320 disposed on the back plate 310, and the planar light source 33 is supported on the frame 320. In this way, the planar light source 33〇 can be well supported. Furthermore, each support post 340 further includes at least one body 342 and a recess 344 disposed in the body 342 and having an opening 3^4a facing the electrode region 332 to reduce the support post 340 and the plane. The actual contact area of the light source 33〇 is used to reduce the leakage phenomenon and increase the service life of the planar light source 3S. In the backlight module 300, since the branching 340' is provided below the electrode region of the planar light source 33A, the effect on the floor of the planar light source 33A can be improved. As a result, the stress concentration can be reduced in the circle B area shown in Fig. 3, and the low plane money 33G broken _ county. Correction, by forming at least a recess 344 in the support post 340, the contact area of the support and the electrode region 332 of the planar light source 330 can be reduced. Therefore, the leakage phenomenon of the planar light source 330 is reduced, and the surface light source of the surface light source 3 is uniform. 4A and 1HB are perspective views of the same column of the preferred embodiment of the present invention. Please refer to FIG. 4a and FIG. 4B together, in the above 8

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201035637 i \j / i i^ivlZ 1TW 24349twf.doc/n The backlight module 3〇〇 can further strengthen the support force of the support column 340 for supporting the S4. For example, each of the support columns 34 〇 = includes a plurality of ribs 342a that are disposed in the concave sample 344 and are coupled to the body 342. The structural strength of the ribbed pool is ^. Referring to FIG. 3, FIG. 4A and FIG. 4B, the back plate 31 can have a plurality of holes 312. Each of the support members further includes a rear member member 346 which is disposed at the bottom of the body 342 and embedded in the corresponding fitting hole 312. Thus the 'support column 34' can be easily fixed to the backboard training. Fig. 5Α~5Ε_ Schematic diagram of the cross-sectional shape of the branch of this hair. Referring to FIG. 5 to FIG. 5 simultaneously, the cross-sectional shape of the body material 2 of the support column is, for example, a circle as shown in FIG. 5A, and an oval shape as shown in FIG. 5b, as shown in FIG. 5C. Or the cross-sectional shape of the groove 344 of the other 'support column 340 as shown in the figure is, for example, a circle as shown in FIG. 5A, a square as shown in FIG. 5B, an ellipse as shown in FIG. ^/or a polygon as shown in Fig. 5D. The invention does not limit the shape of the support post 340. ^, the main idea is that when the support column 340 is supported on the electrode area 332 of the planar light source 330, the main reason for causing leakage of the planar light source is: the contact area between the branch column 340 and the planar light source 33? And the column pillar 340 uses the resistivity of the material. As shown in Fig. 5A, the length of the boundary between the boundary of the recess 344 and the body 342 is - the allowable contact length L. The allowable contact length L is preferably not more than 3.5 gongs. (4), #料 contact length L is not greater than 9 201035637 Λ v ... a ▲ uMZlTW 24349twf.doc / n 3.5 mm, can ensure that the contact area of the support column 34 〇 and the planar light source 33 〇 electrode area 332 is small enough to avoid The planar light source 33 produces a phenomenon. Further, as shown in Figs. 5A to 5D, there is only one groove 3 of the support post 34A. However, the support post 34 is not limited to having only the recess 344. Referring to Figure 5E, the support post 340 can also be of a design having a plurality of recesses 344 as long as the boundary between the recess 344 and the body 342 allows for a long twist [to be no more than 3.5 shy. 5E is a hexagonal shape. For example, other suitable shapes may be used, and are not limited herein. Support, 340 material can be 矽 rubber. The volume resistivity of the ruthenium rubber is about 5*l〇i5 ohm_cm, so that the support column 34〇 can have a high resistivity to avoid leakage. In addition, the cushioning effect of the rubber is also better. When subjected to external force, the support column 34〇 can provide support and cushioning effect for the planar light source 33〇. The present invention does not limit the material of the support column, as long as it is a soft high-impedance material. Moreover, the arrangement of the support columns 34 on the back plate 310 can be changed, for example, an array arrangement or a honeycomb arrangement, thereby improving the overall trapping effect of the support columns on the planar light source 330, and the planar light source 33 can adopt a cold cathode. The present invention is not limited to a fluorescent flat lamp, an external electrode fluorescent flat lamp, or an internal electrode camping flat lamp. As described above, in the backlight module 300 shown in FIG. 3, since the branch column 34 is disposed under the electrode region of the planar light source 330, the effect of the selection of the planar light source 330 can be improved. As a result, the stress concentration can be reduced in the circle B region as shown in Fig. 3, thereby reducing the phenomenon that the planar light source is broken, MZ1TW 24349twf.doc/n 201035637. In particular, by changing the shape, material, and the like of the support post 340, the leakage phenomenon of the planar light source 33〇 can be further reduced, and the uniformity of the surface light source provided by the backlight module 300 can be improved. In particular, the present invention does not limit the shape, arrangement, material, and the like of the support post 340, as long as it can support the planar light source 330 and can reduce the leakage of the planar light source 33〇. FIG. 6 is a schematic diagram of a liquid crystal display device according to a preferred embodiment of the present invention. Referring to FIG. 6, the liquid crystal display device 4 includes a backlight module 410 and a liquid crystal display panel 420. The backlight module 300 is the same as that of the backlight module 300' as shown in FIG. 3, and the same technical description is not repeated here, and the liquid crystal display panel 420 is disposed in the backlight module. Above the group 41〇. Please refer to FIG. 6 'The planar light source 330 may be a cold cathode fluorescent flat lamp, an outer electrode fluorescent flat lamp, or an inner electrode fluorescent flat lamp. In addition, the liquid crystal display device 400 may further include a plurality of optical films 43A supported on the frame 320 and located between the planar light source 33A and the liquid crystal display panel 42A. Ο These optical films may be diffusers, 稜鏡#, etc., to make the light provided by the planar light source 330 more uniform. In addition, the liquid crystal display device 400 may further include a front frame 440, cover the liquid crystal display panel 420, and be combined with the back plate 310. Furthermore, the liquid crystal display device 400 may further include a cushion 45 〇 disposed on the inner side of the front frame 440 and between the liquid crystal display panel 42 〇 and the optical film 43 ,, so that each combination can be preferably combined. The member is supported and buffered for the liquid crystal display panel 420. 11 ZU1UJjo^/M21TW 24349twfdoc/n ... Since the backlight module of the liquid crystal display device shown in FIG. 6 is the backlight module 300 capable of preferably supporting the flat light source 330, the liquid crystal display device can It can withstand a large external impact, and can prevent the planar light source 33 from being broken, thereby having a long life.

In addition, since the backlight module 3 (8) described above can also reduce the leakage current, P, the uniform (10) surface light source is provided, thereby improving the quality of the crystal display device.综 In summary, the backlight module and the liquid crystal display device of the present invention have the following advantages: · (1) The support column is disposed in the electrode region of the planar light source, and the material can be effectively supported, and the (four) free surface wire The phenomenon of cracking due to stress. _ 'This back group has a long service life. (2) Under the premise of effectively supporting the planar light source, the contact area between the support column and the planar system is reduced, thereby reducing the planar light: current phenomenon. Therefore, the backlight module can provide a uniform surface light source. o ^ (3) The liquid crystal display device has the above-described backlight module, which in turn has a long life and can provide excellent display quality. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. f The scope of protection of the present invention is defined by the scope of the appended patent application. 12 2〇1〇35637_ 24349twf.doc/n [Simple description of the drawing] Figure 1 shows the conventional flat fluorescent lamp The top view is schematic. 2 is a schematic illustration of a backlight module having the planar fluorescent lamp of FIG. 1. FIG. 3 is a view of a preferred embodiment of the present invention. 4A and 4B are perspective views of the present invention in a preferred perspective. BRIEF DESCRIPTION OF THE DRAWINGS A schematic diagram of a support column of an embodiment of the present invention is not shown in Figs. 5A to 5E. Cross section of a support raft of a preferred embodiment of the invention. A liquid crystal display is shown in Fig. 6 which is a schematic view of a preferred embodiment of the invention. [Main component symbol description] 100: planar fluorescent lamp 110, 332: electrode region ❹ 120, 334: electrodeless region 200, 300, 410: backlight module 210, 310: back plate 220, 320: frame 312: fitting Hole 330. Planar light source 340 = support column 342: body 13 201035637

MZ1TW 24349twf.doc/n 342a: rib 344: groove 344a: opening 346: fitting member 400: liquid crystal display device 420; liquid crystal display panel 430: optical film 440: front frame 450: cushions A, B: Area d: distance

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Claims (1)

201035637 On w...MZ1TW 24349twf-doc/n VII. Patent application scope: 1. A backlight module comprising: a backplane; a planar light source disposed on the backplane, the planar light source having an electrode region and surrounding An electrodeless region beside the electrode region; /, a plurality of support columns are disposed on the back plate, and the support columns support the planar light source and contact the electrode region. * 矛 〇 2. The backlight module of claim 1, further comprising a frame, 5 is placed on the back plate, and the planar light source is supported on the frame. . The backlight module of claim 2, wherein each support column further comprises at least one body and a recess, the recess being disposed in the body and having an opening to the electrode region . 4. The backlight module of claim 3, wherein each of the support columns further comprises a plurality of ribs disposed in the groove and connected to the body. 5. The backlight module of claim 1, wherein the back plate has a plurality of fitting holes, each of the support columns further includes a fitting member disposed at a bottom of the body, and the fitting member Embedding into the corresponding fitting hole. The backlight module of claim 3, wherein the length between the boundary of the groove and the boundary of the body is an allowable contact length. 7. The backlight module of claim 6, wherein the allowable contact length is no more than 3.5 mm. 8. The backlight module of claim 3, wherein the cross-sectional shape of the body of the present invention is one selected from the group consisting of a circle, a square, an ellipse, and a polygon. 9. The backlight module of claim 3, wherein the cross-sectional shape of the groove is one selected from the group consisting of a circle, a square, an ellipse, and a polygon. The backlight module of claim 1, wherein the arrangement of the support columns comprises an array arrangement or a honeycomb arrangement. The backlight module of claim 1, wherein the support columns are made of ruthenium rubber. The backlight module of claim 2, wherein the flat light source comprises a cold cathode fluorescent flat light, an outer electrode fluorescent flat light, or an inner electrode fluorescent flat light. A liquid crystal display device comprising: a backlight module comprising a back plate; a planar light source disposed on the back plate, the planar light source having an electrode region and a electrodeless electrode surrounding the electrode region a plurality of support columns disposed on the back plate, wherein the support columns support the planar light source and contact the electrode region; and a liquid crystal display panel disposed above the backlight module. 14. The liquid crystal display device of claim 13, further comprising a frame disposed on the backplane, wherein the planar light source is supported on the frame. 15. The liquid crystal display device of claim 13, wherein each of the support columns further includes at least a body and a groove, the groove being disposed in the body, And having an opening to the electrode region on one side. 16. The liquid crystal display device of claim 15, wherein the 'each-support column further includes a plurality of ribs disposed in the groove and distal to the body. 17. If you apply for the 13th item of the special fiber enclosure to read the money display device, set up a number of fitting holes in the OO 2° sea, and each column will include a funeral structure at the bottom of the financial body and the occupational components. 18. The liquid crystal display device of claim 15, wherein the length between the boundary of the groove and the boundary of the body is an allowable contact length. The liquid crystal display device of claim 18, wherein the valley contact length is not more than 3.5 mm. 20. The liquid crystal display device according to claim 15, wherein the cross-sectional shape of the body is selected The liquid crystal display device of the fifteenth aspect of the invention is characterized in that the cross-sectional shape of the groove is selected from a circular shape, a square shape, or the like. Among the polygons - The liquid crystal display device of claim 13, wherein the arrangement of the k1 support columns includes an array arrangement or a honeycomb arrangement. The liquid crystal display device of claim 13, wherein the column (four) mass comprises a glue. The liquid crystal display device of claim 13, wherein the planar light source comprises a cold cathode fluorescent flat lamp, an outer electrode fluorescent flat lamp, or an inner electrode fluorescent plane light. 25. The liquid crystal display device of claim 13, further comprising a plurality of optical films supported on the frame and located between the planar light source and the liquid crystal display panel. 26. The liquid crystal display device of claim 25, further comprising a front frame covering the liquid crystal display panel and combined with the back plate. 27. The liquid crystal display device of claim 26, further comprising a cushion disposed on the inner side of the front frame and between the liquid crystal display panel and the optical film. 18