TWI375090B - Liquid crystal display and backlight module thereof - Google Patents

Description

1375090 P070926BMZ1TW 27359twf.doc/n IX. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device and a backlight module thereof. [Prior Art] With the improvement of semiconductor technology, liquid crystal display (LCD) has the advantages of low power consumption, light weight, high resolution, high color saturation, long life, etc. Display devices have recently been widely used to replace cathode ray tube displays (CRTs). LCD display farm applications are widely used in digital cameras, notebook computers, desktop monitors, mobile phones, personal digital assistants (PDAs), car TVs, and global satellite positioning systems (Global p〇). Siti〇n System, GPS), handheld video games, translation machines and electronic watches and other electronic products that are closely related to life. The liquid crystal display device includes a liquid crystal display panel (LCD panel) and a backlight module (Backlight Module) disposed under the liquid crystal display panel, wherein the backlight module is configured to provide sufficient brightness for the liquid crystal display panel to display image. The backlight module can be divided into a side-lighting backlight module and a direct-type backlight module according to the position of the light source. FIG. 1A is a schematic diagram of a conventional edge-lit backlight module. For example, the side-lighting backlight module 100 shown in FIG. 1A includes a back frame 5 1375090 P070926BM21TW 27359 twf.doc/n 110, a light source 120 disposed in the back frame 110, and an optical plate 130, and the optical plate 130 is located. Next to the light source 120. In addition, in order to enhance the utilization of the light source to improve the overall brightness of the edge-lit backlight module, the use of the optical film 140 in the side-inlighting backlight module 100 is also used.

Figure 1B is a schematic illustration of the optical film and frame of Figure 1A. Referring to FIG. 1B, for the convenience of positioning, the optical film 140 has a positioning portion 142, 144 on each side of the optical film 140. The positioning portion 142 is adhered to the back frame 110' of the side-lighting backlight module 100 by the adhesive tape 150. A positioning portion 144 is inserted into the positioning hole 112 of the back pocket 110. The number of optical films 140 used in conjunction with the different types of optical plates 130' in the side-lighting backlight module 1 is also different. When the optical plate 130 has a V-shaped groove, since the V-shaped groove has an effect of collectively managing light to improve the brightness of the surface of the panel, the function is similar to that of the prism in the optical film, so the optical film 14 used in combination is used. The number is small, and generally two optical films 140 are used. When the optical plate 13 does not have a V-shaped groove, the number of optical films 14 搭配 used in combination is also large, and generally four optical films 140 are used. However, when the vertical depth of the positioning hole 112 of the back frame 110 is only suitable for accommodating the two optical films 14G, if the optical plate 13 () type is replaced (for example, the replacement is not, the V-shaped groove is formed). And when the number of (4) optical films 140 is increased to four, the positioning portions 144 of the four optical films are not fully inserted into the positioning holes 112 +. It can be seen that the back frame m is not shared. Therefore, depending on the number of optical films 140 used, the depth of the positioning of the back frame 110 in the vertical direction should also be correspondingly changed. Thus, 6 1375090 P070926BMZ1TW 27359twf.doc/n, it is necessary to prepare two frames 110 of positioning holes 112 having different vertical depths, which increases the production cost and material cost.

SUMMARY OF THE INVENTION The present invention provides a backlight module that can save manufacturing costs and material costs. The invention provides a liquid crystal display capable of saving manufacturing and material costs

Device.

The present invention provides a backlight module that is adapted to be disposed on one side of a liquid crystal display panel. The backlight module includes a light source, an optical plate, a plurality of optical films, and a back frame. The optical plate is disposed on one side of the light source, and the optical film is disposed on a side of the optical plate relatively close to the liquid crystal display panel. At least one side of each optical film has at least one positioning portion, and the light source, the optical plate and the optical film are disposed in the back frame, and the back frame is provided with a plurality of connected positioning portions corresponding to the optical film. The hole, wherein the positioning holes are misaligned with each other, and the positioning portion of the optical film is correspondingly disposed in the positioning hole. The present invention further provides a liquid crystal display device comprising: a board and - the above-mentioned # domain group. The f wire group is disposed on one side of the liquid crystal display panel. In one embodiment of the invention, each of the locating holes has parallel sides that are perpendicular to each other and are connected to parallel sides of the I locating holes, and the vertical sides of the other locating holes are connected. In one embodiment of the invention, they are parallel. Parallel sides of the connected positioning holes 7 1375090 27359twf.doc/n

P070926BMZ1TW In one embodiment of the invention, the length of each of the vertical sides is the total thickness of the optical films in the positioning holes plus 0.05 cm. In an embodiment of the invention, each of the positioning holes has a hole diameter, and the hole closer to the positioning hole of the liquid crystal display panel has a smaller aperture. In one embodiment of the invention, the aperture of the locating aperture closest to the liquid crystal display panel is greater than 5 cm. In an embodiment of the invention, the light source comprises a cold cathode fluorescent lamp or a light emitting diode. In an embodiment of the invention, the optical plate is a light guide plate, and the light guide plate has a light incident surface and a light emitting surface substantially perpendicularly connected to the light incident surface. For the display panel. Further, a plurality of V-shaped grooves may be disposed on the surface of the light guide plate relatively adjacent to or opposite to the liquid crystal display panel. In an embodiment of the invention, the light source is located between the display panel and the frame, and the optical plate is a diffusion plate, and the diffusion plate is disposed between the optical film and the light source. In an embodiment of the invention, the positioning portions of the partial optical films coincide, and the positioning portions of the remaining optical films coincide. In an embodiment of the invention, the optical film comprises a diffusion sheet and a prism sheet. In an embodiment of the invention, the material of the back frame comprises plastic. The invention further provides a backlight module, which is suitable for being disposed on one side of a liquid crystal display panel. The backlight module comprises a light source, an optical plate, at least one 8 1375090 P070926BMZLTW 27359twf.doc/n optical film and a back frame. . The optical plate is disposed on one side of the light source, and the optical film is disposed on a side of the optical plate opposite to the liquid crystal display panel, wherein at least one side of the optical film has at least one positioning portion. The light source 'optical plate and the light film are arranged in the back frame, and the first frame and the second positioning hole are connected to the positioning portion of the back frame corresponding to the optical film, and the positioning portion is correspondingly arranged. In the first positioning hole, wherein the first positioning hole has two first vertical sides and a first parallel side connected between the first vertical sides, and the second positioning hole has two second vertical sides At least one second parallel side connected to the first vertical side and a second parallel side connected between the second vertical side, wherein at least one of the first vertical side and the second vertical side are not Aligned, and the first parallel side, the second parallel side, and the third parallel side are parallel to each other. The present invention further provides a liquid crystal display device comprising a liquid crystal display panel and one of the backlight modules, wherein the backlight module is disposed on one side of the liquid crystal display panel. In one embodiment of the invention, the length of the first vertical side described above is plus 〇〇5 cm for the total thickness of the optical film located in the first locating aperture. In one embodiment of the invention' The first positioning hole is adjacent to the liquid crystal display panel, and the aperture of the first positioning hole is greater than 5 meters. In an embodiment of the invention, the light source comprises a cold cathode fluorescent lamp or a light emitting diode. In an embodiment of the invention, the optical plate is a light guide plate, and the light guide plate has a light incident surface and a light emitting surface substantially perpendicularly connected to the light incident surface. The light incident surface faces the light source and the light emitting surface. Facing the display panel. 9 1375090 P070926BMZ1TW 27359twf.doc/n In the embodiment of the invention, the above-mentioned web is relatively adjacent to the surface of the liquid crystal display panel which is provided with a plurality of v-shaped grooves. In the present invention, the above-described cutting is located between the display panel disks 5, and the optical plate is a diffusion plate, and the diffusion plate is disposed between the film and the light source. In the present invention, part of the optical portion is the mosquito portion B' and the positioning portions of the remaining optical films overlap. In an embodiment of the invention, the genius of the genius u > and the cymbal. The sirocco precursor membrane includes a diffusion sheet. In one embodiment of the invention, the material of the back frame includes plastic. The Kongxian device and its backlight module, which will position the back frame, are suitable for accommodating two optical and four diaphragms, thus saving the manufacturing cost and material cost of the back frame. The two tips and advantages can be more clearly understood. The following is a detailed description of the "% of the cases". [Embodiment] The display device comprises: a liquid crystal display panel and a moonlight 杈 group disposed on one side of the liquid crystal display panel, the back source, the optical plate, at least the optical film 丄 and the =" Inside the frame, and the optical film on the opposite side of the back frame 22: 'The positioning of the light source with the connection w is set to 2 = the configuration of some connected positioning holes is changed' to make the optical film: position: 1375090 P070926BMZ1TW 27359twf.doc /n is limited by the edge of the positioning hole' so that different numbers of optical film positioning portions can be accommodated in the positioning holes of the same back frame. In this way, by using the same back frame, it is possible to use two or four optical films together, and it is not necessary to change the design of the positioning holes of the back frame for the number of optical films to be used, thereby saving manufacturing and material costs. A description of various embodiments will be given below for the spirit of the present invention. [First Embodiment]

Fig. 2A is an exploded view of a liquid crystal display device of a first embodiment of the present invention. Referring to FIG. 2A, the liquid crystal display device 1 includes a liquid crystal display panel 1100 and a backlight module 1200. The backlight module 12 is disposed on one side of the liquid crystal display panel 1100, and the backlight module 12 of the embodiment is an edge-lit backlight module, which includes a light source 21丨 and an optical plate 1220. An optical film set 1230 and a back frame 1240, wherein the light source 1210, the optical plate 1220, and the optical film set 1230 are all disposed in the back frame 1240.

As shown in Fig. 2A, the light source 1210 is a cold cathode fluorescent tube, but in other embodiments, the light source 1210 may also be a light emitting diode or other actively illuminating article. The optical plate 1220 is a light guide plate disposed beside the light source 1210, and the light incident surface 12 faces the light source 1210, and the light exit surface 1224 faces the liquid crystal display panel 1100. The optical plate 122 of the present embodiment is not provided with a V-shaped groove on the surface of the liquid crystal display panel 1100 and relatively far from the liquid crystal display panel 11A. The optical film set 1230 of the present embodiment has four optical films 1230a, 1230b, and 1230c in order to improve the overall light-emitting effect of the backlight module 12A of the present embodiment and further improve the display quality of the liquid crystal display device 1A. 11 1375090 P070926BMZ1TW 27359twf.doc/n and 1230 (1 ' and the optical films 1230a and 1230d may be diffusion sheets, and the optical films 1230b, 1230c may be prism sheets. In addition, each optical film 1230a, 1230b, 1230c and One side of the I230d has a positioning portion; 1232a, 1232b, 1232c and 1232d. • The back frame 240 is made of plastic, and the back frame 1240 corresponds to the positioning portions 1232a, 1232b of the optical films 1230a, 1230b, 1230c, 1230d, 1232c, 1232d are provided with two connected positioning holes 1242, 1243, wherein the positioning holes 1242 and the positioning holes 1243 are offset from each other, and the positioning portions 1232a, 1232b, 1232c and 1232d of the optical films 1230a, 1230b, 1230c and 1230d correspond to each other. 2B is a schematic view of the back frame and its positioning hole of the embodiment. Referring to FIG. 2A and FIG. 2B, the positioning hole 1242 and the positioning hole 1243 are mutually wrong. The two positioning holes 1242 and 1243 are partially overlapped, but at least one of the edges is not aligned with each other, so the positioning holes 1242 and 1243 have different apertures. In this embodiment, the positioning of the liquid crystal display panel 11 is relatively adjacent. The aperture 1243 has a hole diameter greater than 5 cm, and the aperture h2 of the positioning hole 1242 that is relatively far from the liquid crystal display panel 1100 is larger than the aperture hi of the positioning hole 1243. The positioning portion 1232a of the optical film 1230a and the positioning portion 1232b of the optical film 1230b are The holes are overlapped and inserted into the positioning holes 1243, and the positioning portion 1232C of the optical film 1230c and the positioning portion 1232d of the optical film I230d are overlapped and inserted into the positioning holes 1242. The aperture of the positioning hole 1242 is H2 is different from the aperture hi of the positioning hole 1243, so the areas of the positioning portions 1232a, 1232b, 1232c, and 1232d of the optical films 1230a, 1230b, 1230c, and 1230d are also correspondingly adjusted. The optical film 12 1375090 P070926BMZ1TW 27359twf.doc/n For example, in the case where the lengths of the insertion portions 1232a and 1232c are the same in the insertion direction of the positioning holes I242 and 1243, the positioning portion l232c is The length in the aperture direction may be greater than the length of the positioning portion 1232a. In other words, the area of the positioning portion 1232c is larger than the area of the positioning portion 1232a. In detail, the positioning hole 1242 has a vertical side 1242a and a parallel side 1242b. The positioning hole 1243 has a vertical side 1243a and a parallel side 1243b. The parallel side 1242b is connected to the vertical side 1243a, and the positioning hole 1243 The aperture size is the length of the parallel side 1243b, and the diameter of the positioning hole 1242 is the sum of the length of the parallel side 1243b and the length of the double parallel side 1242b. In addition, in order to reserve assembly tolerances, the length of the vertical side 1242a is the total thickness of the two optical films 123〇c, 123〇d plus 0.05 cm, and the length of the vertical side 1243a is two optical films 1230a. The total thickness of 1230b is 〇〇 5 cm. In addition, the positioning portions 1232c and 1232d of the optical films 1230c and 1230d are such that the length of the positioning hole 1242 in the aperture direction is larger than the aperture of the positioning hole 1243, so that the position of the parallel side 1242b can be restricted, and the optical film 1230c is used. 1230d is fixed in the frame 1240. In the present embodiment, the optical diaphragms 132a, 1230b are supported by the optical diaphragms 1230c, 1230d and secured within the frame 1240. In addition, although the present embodiment is illustrated by taking one of the plurality of positioning holes 1242 and 1243 on one side of the frame 1240, the other side of the frame 1240 may be provided with only another positioning hole, and the optical film 123〇 a, 123〇b, 123〇. Or the other side of the 1230d is also provided with a positioning portion (not shown), and the positioning portion (not 13 1375090 P070926BMZ1TW 27359twf.doc / n mark) may be a tape bonding method to be fixed to the frame l24 〇 another Positioning holes. It is worth mentioning that, in consideration of the overall brightness of the backlight module 12, it is also considered to be a way to improve the utilization of the light source and reduce the use of the optical film. The number can still make the liquid crystal display device 1000 have good display quality, and the purpose of fixing the optical film can still be achieved by the positional offset holes 1242 and 1243 of the back frame 124〇. FIG. 3A is a liquid crystal| A schematic view of another optical plate that can be used. Referring to FIG. 1 and FIG. 3A simultaneously, for example, the optical plate 122 used in the liquid crystal display device 1000 of the present embodiment is replaced with a surface relatively close to the liquid crystal display panel 1100. The optical plate 1220'' provided with the v-shaped groove can be used for centralized management of the light to improve the surface brightness of the panel. The surface of the panel is increased, and the optical film in the liquid crystal display device 1 can be correspondingly reduced ( For example, the number of cymbals can still maintain the overall temperature of the backlight module 1200 within a predetermined acceptable range. The figure shows the number of optical films used in the liquid crystal display and the back frame. Referring to FIG. 2A and FIG. 3B simultaneously, after replacing the optical plate 1220' having a V-shaped groove, only the optical films i230c and 123〇d can be used, and the positioning portions 1232c and 1232d are equally inserted into the positioning holes. 1242. Of course, in other embodiments, the optical plate 1220 provided with a V-shaped groove on the surface of the liquid crystal display panel 11A may be replaced with a surface that is relatively far from the liquid crystal display panel 1100. An optical plate (not shown) of a V-shaped groove. It is worth noting that 'because the length of the positioning portions 1232c and 1232d in the aperture direction of the positioning hole 1375090 P070926BMZ1TW 27359twf.doc/n 1242 is larger than the aperture of the positioning hole 1243, The positioning portion 12 and the 1232d are inserted into the positioning hole 1242, and the positioning portions 1232c and 1232 (1 are limited by the parallel side 1242b to fix the optical film n30c, l230d in the back frame 1240). The positioning portions 1232c and 1232d are shaken among the positioning holes 1242 and 1243. It can be seen from the above that the number of optical films can be selected by the plurality of positioning holes on the back frame, so that the liquid crystal display of the embodiment can be selected. The back frame has • sharing. In short, it is not necessary to make different back frames depending on the number of optical films used, so the manufacturing and material costs can be saved, and the back frame is convenient to use. Moreover, although this embodiment is A side-lit backlight module is taken as an example, but those skilled in the art can also imaginably use the direct-lit backlight module. FIG. 2C shows a direct-lit backlight module for a liquid crystal display device. As shown in FIG. 2C, in the liquid crystal display device 1000a, the light source 1210a is composed of a plurality of cold cathode lamps (not shown) or a plurality of light emitting diodes (not shown). The light source is a light source. The board 122 is a diffuser, and the diffuser is disposed between the light source 1210 and the liquid crystal display panel 1100. In addition, although the above description has a positioning portion on one side of the optical film, as an example, in the other unexemplified embodiments consistent with the spirit of the present invention, the number and position of the positioning portions of the optical film are also Different changes can be made as needed, and the position and number of positioning holes of the back frame are also correspondingly changed, that is, those skilled in the art can also imaginatively change the positioning portion of the optical film. The number and position of the positioning holes, of course, the position and number of positioning holes of the back frame 1375090 P070926BMZ1TW 27359twf.doc/n will also change correspondingly. [Second Embodiment] This embodiment is substantially the same as the first embodiment, and the same or similar element numbers denote the same or similar elements, and the same will not be described again. 4 is a schematic view of a back frame of a second embodiment of the present invention. Referring to FIG. 4, the plurality of positioning holes 1242, 1243 of the back frame 1240' of the embodiment have a common side 1244, and the parallel sides 1242b' of the positioning holes 1242' and the vertical sides U43a' of the positioning holes 1243' The vertical side edges 1242a' of the positioning holes 1242 are not aligned with the vertical sides 1243a of the positioning holes 1243'. In this structure, the two clamping holes 1242, 1243' are misaligned with each other. The positioning holes 1242 and the spotting holes 1243 are "dislocated" to each other, meaning that the two positioning holes 1242, 1243 are partially overlapped, but at least one edge is not aligned with each other, so the positioning holes 1242, 1243' have different ones. Aperture h2, hi. Similarly, by positioning holes 1242' and 1243, two or four optical films (not shown) can be placed in the back frame 1240, so that the back frame 124 is closed.

[THIRD EMBODIMENT] The present embodiment is substantially the same as the second embodiment, and the same or similar element numbers denote the same or similar elements, and the same will not be described again. Figure 5 is a schematic illustration of a piggyback in accordance with a third embodiment of the present invention. Referring to FIG. 5, the back frame 1240" of the embodiment has a plurality of positioning holes 1242, , 1243, and 1244 ' 1245, and the parallel sides of the positioning holes 1242" are perpendicular to the positioning holes 1243. 1243a'' connection, positioning hole 〖243,, parallel 16 1375090 P070926BMZ1TW 27359twf.doc/n side 1243b" and the vertical side 1244a' of the positioning hole 1244", connected, the parallel side 1244b" of the positioning hole 1244" and The vertical sides 1245a'' of the locating holes 1245" are connected. In other words, the connected vertical sides and parallel sides are stepped. The positioning portions 1232a, 1232b, 1232c, and 1232d (shown in FIG. 2A) of the optical films 1230a' 1230b, 1230c, and 1230d are correspondingly inserted into the positioning holes 1242", 1243", 1244", 1245", and these The optical films 1230a, 1230b, 1230c, and 1230d are laminated.

Similarly, some or all of the optical films i23〇a, 1230b, 1230c, and 1230d can be selectively used by the positioning holes 1242, 1243", 1244", and 1245"'. Therefore, the present embodiment is used. The back frame 1240' of the example has the same. [Fourth embodiment] This embodiment is substantially the same as the third embodiment, and the same or similar component numbers represent the same or similar components, and the same is no longer the same. Make a narrative.

Figure 6 is a schematic view of a back frame of a fourth embodiment of the present invention. Referring to FIG. 6 'the back frame 1240 of the embodiment, 'the plurality of positioning holes 1242,,, 1243''' and the vertical sides 1242a of the positioning holes 1242',, 1243,, , U43a'" are not aligned with each other and the parallel sides 1242b of the positioning holes 1242,, are connected to the vertical sides 1243a of the positioning holes 1243"'. Optical film (shown in Figure 2A) The positioning portions 1232a, 1232b, 1232c, and 1232d are correspondingly inserted into the positioning pins 1242', '1243,", wherein the positioning portion 1232b inserted into the positioning hole 1243"' is partially inserted. On the positioning portion 1232c of the positioning hole 1242,,. Similarly, by these positioning holes 1242,, ', 1243,,,, the back frame 17 1375090 can be made.

Although Cai (4) has been used as the above, the financials are not used to slap the invention, and any technical field t has the usual knowledge. Without any deviation from the spirit and scope of the present invention, # may make some changes and refinements. The scope of protection of the present invention is defined as >2|^ as defined in the appended patent application. P070926BMZ1TW 27359twf.doc/n =40 - has commonality. It is worth mentioning that the positioning holes me,,,, 3,,, and B can be the same. In summary, in the backlight module, the wrong positioning hole of the back frame is used. == The position of the positioning hole can be limited by the edge of the positioning hole, so that different mathematical film can be received in the positioning hole of the same frame. In this way, the same-(four) box can be used to switch between two or four optical films. It is not necessary to change the positioning leaves of the back frame for the number of optical films, which can save production and material costs. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a schematic view of a conventional edge-lit backlight module. Figure 1 is a schematic view of the optical sheet and frame of Figure 1A. 2A is an exploded view of a liquid crystal display device of a first embodiment of the present invention. 2B is a schematic view of the back frame and its positioning hole of the embodiment. 2C is an exploded view of a liquid crystal display device using a direct type backlight module. 3A is a schematic view of another optical plate that can be used in a liquid crystal display. Fig. 3B is a schematic view showing the number of optical films and the back frame used in combination with the liquid crystal display. 4 is a schematic view of a back frame of a second embodiment of the present invention. Figure 5 is a schematic illustration of a back frame of a third embodiment of the present invention. 1375090 P070926BMZ1TW 273 59twf.doc/n FIG. 6 is a schematic view of a back frame according to a fourth embodiment of the present invention. [Description of main component symbols] 100: Side-lit backlight module 110, 1240, 1240', 1240", 1240",: Back frame 112: Positioning hole

120, 1210, 1210a: light source 130, 1220, 1220a: optical plate 1222: light-incident surface 1224: light-emitting surface 140, 1230a, 1230b, 1230c, 1230d: optical film 142, 144, 1232a, 1232b, 1232c, 1232d: positioning Parts 1000, 1000a: liquid crystal display device 1100: liquid crystal display panel 1200: backlight module

1220': optical plate 1230 having V-shaped grooves: optical film groups 1242, 1243, 1242, 1243, 1242", 1243", 1244", 1245", 1242", 1243", positioning Holes 1242a, 1243a, 1242a, 1243a', 1242a", 1243a", 1244a", 1245a", 1242a", 1243a,": vertical sides 1242b, 1243b, 1242b, 1243b, 1242b,, 1243b ", 1244b", 1245b", 1242b, ',, 1243b,,,: parallel side 1244: co-edge hi, h2: positioning aperture 19

Claims (1)

The backlight module of claim 5, wherein the aperture of the positioning hole closest to the liquid crystal display panel is greater than 5 cm. 7. The backlight module of claim 2, wherein the light source comprises a cold cathode fluorescent tube or a light emitting diode. 8. The backlight module of claim 1, wherein the optical plate is a light guide plate, and the light guide plate has a light incident surface and a light emitting surface perpendicularly connected to the light incident surface. The light incident surface faces the light source, and the light emitting surface faces the display panel. 9. The backlight module of claim 8, wherein the light guide plate is provided with a plurality of V-shaped grooves on a surface of one of the liquid crystal display panels. 10. The backlight module of claim 1, wherein the light source is located between the display panel and the back frame, and the optical plate is a diffusion plate, and the diffusion plate is disposed on the optical film. Between this light source. 11. The backlight module of claim 2, wherein the positioning portions of the optical films overlap, and the remaining positioning portions of the optical films overlap. 12. The backlight module of claim 1, wherein the optical film comprises a diffusion sheet and a gusset. 13. The backlight module of claim 1, wherein the material of the ★North frame comprises plastic. A liquid crystal display device comprising: a liquid crystal display panel; a backlight module disposed on one side of the liquid crystal display panel, comprising: 1375090 P070926BMZ1TW 27359twf.doc/n 20. As claimed in claim 14 A liquid crystal display device, wherein the light source comprises a cold cathode fluorescent tube or a light emitting diode. The liquid crystal display device of claim 14, wherein the optical plate is a light guide plate, and the light guide plate has a light incident surface and a light emitting surface substantially perpendicularly connected to the light incident surface. The light incident surface faces the light source, and the light emitting surface faces the display panel. 22. The liquid crystal display device of claim 21, wherein the light guide plate is relatively adjacent or phased. A plurality of V-shaped grooves are disposed on a surface away from the liquid crystal display panel. The liquid crystal display device of claim 14, wherein the light source is located between the display panel and the back frame, and the optical plate is a diffusion plate, and the diffusion plate is disposed on the optical film Between this light source. 24. The liquid crystal display device of claim 14, wherein the positioning portions of the optical films overlap, and the remaining positioning portions of the optical films overlap. 25. The liquid crystal display device of claim 14, wherein the optical film comprises a diffusion sheet and a gusset. 26. The liquid crystal display device of claim 14, wherein the material of the back frame comprises plastic. 27. A backlight module, configured to be disposed on a side of a liquid crystal display panel, comprising: a light source; an optical plate disposed on one side of the light source; at least one optical film disposed on the optical plate relatively close to The liquid crystal display 23 1375090 P070926BMZ1TW 27359 twf.doc / n one side of the display panel, wherein at least one side of the optical film has at least a positioning portion; and a back frame, the light source, the optical plate and the optical film The positioning frame is disposed in the back frame of the optical film, and the positioning portion of the optical film is provided with a connected one-position hole and a first positioning hole and the positioning portion is correspondingly disposed in the first positioning. In the hole, the first positioning hole has two first vertical sides and a first parallel side connected between the first vertical sides, and the second positioning hole has two second vertical sides, At least one second parallel side edge connected to the first vertical side edges and a third parallel side edge connected between the second vertical side edges, wherein at least one of the first vertical side and one of the first side Two vertical sides are not aligned And the first parallel side, the second parallel side and the third parallel side are parallel to each other. 28. The backlight module of claim 27, wherein the length of the first vertical sides is the total thickness of the optical films in the first positioning holes plus 〇.05 cm. 29. The backlight module of claim 27, wherein the first positioning hole is adjacent to the liquid crystal display panel, and the hole of the first positioning hole is pinched by more than 5 cm. The backlight module of claim 27, wherein the light source comprises a cold "polar fluorescent tube or a light emitting diode." 31. The backlight module according to claim 27 And the optical light is a light guide plate, and the light guide plate has a light incident surface and a light emitting surface perpendicularly connected to the inlet and the surface, the light incident surface faces the light source, and the light emitting surface For the display panel, 24 P070926BMZ1TW 27359twf.d〇c/n The backlight module described in item M of the light guide plate is provided with a plurality of V-shaped grooves. The surface of the 1-cell liquid crystal display panel is provided with 33. Patent application No. 27 of the standing light source is located in the display panel fish, moon, and "plate", and the diffuser plate is disposed, and the optical plate is between the 〆 diffusion U two-recording optical film and the light source. The backlight module described in claim 27, wherein the dry film of the partial film overlaps, and the remaining positioning portions of the optical films overlap. This is as Shen. The backlight module of claim 27, wherein the two pre-films comprise a diffusion sheet and a cymbal sheet. %· For example, the backlight module described in claim 27 (4), wherein the material of the moon frame comprises plastic. 37. A liquid crystal display device comprising: a liquid crystal display panel; The moonlight panel is disposed on the side of the liquid crystal display panel, and includes: a light source; an optical panel disposed on one side of the light source; and at least one optical film disposed on the optical panel relatively close to the liquid crystal display panel a side of the optical film, wherein at least one side of the optical film has at least one positioning portion; and a back frame, the light source, the optical plate and the optical film are disposed in the back frame, and the back frame corresponds to The positioning portions of the optical films are provided with a first positioning hole and a second positioning hole, 25 1375090 P070926BMZ1TW 27359twf.doc/n And the positioning portion is correspondingly disposed in the first positioning hole, wherein the first positioning hole has two first vertical sides and a first parallel side connected between the first vertical sides, and the first The two positioning holes have two second vertical sides, at least one second parallel side connected to the first vertical sides, and a third parallel side connected between the second vertical sides, wherein at least The first vertical side is not aligned with the second vertical side, and the first parallel side, the second parallel side and the third parallel side are parallel to each other. 38. The liquid crystal display device of claim 37, wherein the length of the female vertical side is the total thickness of the optical films respectively located in the positioning hole ten plus 0.05 cm. The liquid crystal display device of claim 37, wherein the first positioning hole is adjacent to the liquid crystal display panel, and the first positioning hole has a hole diameter larger than 5 cm. 40. The liquid crystal display device of claim 37, wherein the light source comprises a cold cathode fluorescent tube or a light emitting diode. /, 41. The liquid crystal display device of claim 37, wherein the optical plate is a guide, and the scale plate is a light-human surface and the light-emitting surface is substantially vertically connected to the light-emitting surface. , the person Glossy ^ Source 'the light surface facing the display panel. μ九42· As shown in the patent application scope, the liquid crystal display is disposed, and the light guide plate is disposed adjacent to or relatively far from the liquid crystal display panel. 43. The liquid crystal display device of claim 37, wherein the light source is located between the display panel and the back frame, and the optical plate is a diffusion plate, 26 1375090 P070926BMZ1TW 27359 twf.doc/n. And the diffusion plate is disposed between the optical film and the light source. 44. The liquid crystal display device of claim 37, wherein the positioning portions of the optical films overlap, and the remaining positioning portions of the optical films overlap. The liquid crystal display device of claim 37, wherein the optical film comprises a diffusion sheet and a prism sheet. 46. The liquid crystal display device of claim 37, wherein the material of the back frame comprises plastic. 27