TW200925683A - Light guide plate, manufacturing method and application thereof - Google Patents

Abstract

A light guide plate, a manufacturing method and an application thereof are described. The light guide plate comprises a substrate including a first surface and a second surface on opposite sides; a plurality of taper structures disposed on the first surface of the substrate, wherein a side surface of each taper structure has an inclination angle with respect to the first surface of the substrate; and a plurality of condensing structures arranged on the second surface of the substrate.

Description

200925683

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a light guide plate structure, and more particularly to a light guide plate structure and a method of fabricating the same, and its use in a liquid crystal display (LCD). [Prior Art] In a liquid crystal display, since a liquid crystal molecule cannot emit light by itself, a backlight is required to allow a user to view the content displayed on the panel of the liquid crystal display. The backlight of the liquid crystal display is provided by a backlight module disposed on the back of the display panel. Therefore, in addition to the display panel, the backlight module is another relatively critical component in the liquid crystal display. Please refer to FIG. 1 for the schematic diagram of the general side-lit backlight module. Generally, the sidelight backlight module 100 is mainly composed of a light guide plate 1, a reflection sheet 104, a light source 106, a lamp cover 108, a diffusion sheet 110, a cymbal sheet n2, and a cymbal sheet 4. The light source 1〇6 is disposed on the side of the light guide plate ι2, and the lamp cover 1〇8 is disposed on the other side of the light source ι6 with respect to the light guide plate 102. A surface of the light guide plate 102 is provided with a plurality of microstructures 116, and a surface of the light guide plate is provided with a surface of the microstructure 116. The surface of the light guide plate 116 is pressed on the reflective sheet 1〇4, wherein the micro-structure 116 of the light guide plate 1〇2 can be The incident light is dispersed. Next, the diffusion sheet 11A is disposed on the light guide plate 102, and the reflection sheet 1〇4 is located on opposite sides of the light guide plate 1〇2, respectively. Then, the cymbal 112 and the cymbal 114 are sequentially stacked on the diffusion sheet 110 above the light guide plate 102 to complete the main structure of the backlight module 1 . The light emitted by the light source 106 is scattered by the light guide plate 1〇2 and the reflection sheet 1〇4, and then transmitted through the diffusion sheet U0 to enhance the uniformity of the emitted light. Since the light self-expanding 6 200925683 is emitted, the directivity of the light is very poor. Therefore, after correcting the direction of the light by the prism sheet 丨丨2 and the cymbal 114, the positive luminance of the backlight module 1 can be improved. . In view of the fact that the backlight module 1 requires some optical film to improve the light quality of the backlight module 100, the thickness of the backlight module 1 is not easily thinned. In addition, the price of the film 2/114 and the diffusion film 11 is expensive, and the market is only oligopolist by several manufacturers, so that the cost of the backlight module is not large. ❹

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for fabricating a light guide plate structure which utilizes a surface exposure method to fabricate a surface microstructure of a light guide plate. Thus, the surface of the light guide plate can be smoothly formed. Forming a microstructure with an inclined angle not only improves the luminous efficiency of the light guide plate, but also saves the manufacturing cost of the light guide plate. Another object of the present invention is to provide a light guide plate structure having a micro surface. The structure has an inclined angle', thereby greatly increasing the light extraction efficiency of the light guide plate, and improving the uniformity of the light source, and pushing the J back degree to enhance the luminous efficiency of the light guide plate. - The inner guideless structure and the light guide of the system can be integrated into the light module of the t-segment film to reduce the use of the optical film, thereby reducing the use of the optical film. The thickness of the optical module and the purpose of reducing the cost. Another object of the present invention is to provide a backlight module with light guiding; a light guiding light guide plate having a slope change is provided on the surface of the structure, and a light collecting layer 200925683 can be simultaneously provided. Therefore, the use of the optical film can be saved, and the use of the light source can be reduced, thereby reducing the cost of the backlight module and reducing the thickness and weight of the backlight module. Still another object of the present invention is to provide a liquid crystal display in which the thickness and weight of the backlight module can be reduced, thereby reducing the weight of the liquid crystal display and reducing the thickness of the liquid crystal display. According to the above object of the present invention, a light guide plate structure is provided, comprising at least a substrate having a first surface and a second surface opposite to each other; a plurality of tapered Φ-shaped structures are disposed on the first surface of the substrate, wherein each One side of a tapered structure has an oblique angle to the first surface of the substrate; and a plurality of light collecting structures are arranged on the second surface of the substrate. According to a preferred embodiment of the present invention, the substrate is a transparent substrate, and the tapered structure and the light collecting structure are made of a transparent material. According to an object of the present invention, a method for fabricating a light guide plate structure includes: providing a transparent substrate, wherein the transparent substrate has opposite first and second surfaces; forming a photoresist layer on the first surface of the transparent substrate Providing a photomask over the second surface of the transparent substrate, and the photoresist layer on opposite sides of the transparent substrate; exposing the photoresist layer through the photomask; and performing a developing step to remove a portion The photoresist layer forms a plurality of tapered structures. According to a preferred embodiment of the present invention, the step of providing a transparent substrate includes at least providing the transparent substrate on a carrier base, and the carrier base has a function of adjusting an exposure angle. Further, during the exposing step, at least including tilting the carrier base by an angle and rotating the carrier base. According to another aspect of the present invention, a backlight module is provided, at least package 8 200925683 includes: a back plate; a light guide plate disposed on the back plate, and the light guide plate includes at least one transparent substrate having an opposite first surface And the second surface and the plurality of tapered structures are disposed on the first surface of the transparent substrate, wherein one side of each of the tapered structures has an oblique angle to the first surface of the transparent substrate; and the plurality of light collecting structures are arranged on the substrate a second surface; and at least one light source disposed on a side of the backing plate. According to still another object of the present invention, a liquid crystal display includes at least a backlight module and a display panel. The backlight module includes at least: a back plate, a light guide plate is disposed on the back plate, and the light guide plate includes at least one transparent substrate having opposite first and second surfaces, and a plurality of tapered structures disposed on the transparent substrate a first surface, wherein one side of each of the tapered structures has an oblique angle to a first surface of the transparent substrate; a plurality of light collecting structures are arranged on the second surface of the substrate; and at least one light source is disposed on a side of the backing plate . The display panel is disposed on the light guide plate of the backlight module. According to a preferred embodiment of the present invention, the backlight module does not include a cymbal and a diffusion sheet. Embodiments The present invention discloses a light guide plate structure, a manufacturing method thereof and an application thereof. In order to make the description of the present invention more detailed and complete, reference is made to the following description and in conjunction with the drawings of Figures 2 through 11. _ At present, the fabrication techniques of the surface microstructure of common light guide plates include Wet Chemical Etching, laser light processing, mechanical processing and Photolithography. Chemical wet etching usually only etches cylindrical microstructures, and the surface of the substrate of the light guide plate exhibits a rough irregular scattering surface after being chemically surnamed 9 ❹ ❹ 200925683. Therefore, the principle of light emission of the light guide plate produced by such a method is advantageous; the regular surface destroys the original total reflection phenomenon, thereby achieving the purpose of guiding the light out of the light guide plate. The cost of using this method to fabricate a light guide plate is low, but the light extraction efficiency is poor. The laser light processing method uses laser light to perform patterning on the surface of the light guide plate. The laser uses the south energy of the laser light to destructively process the predetermined area of the substrate of the light guide plate to form a desired surface on the substrate of the light guide plate. The microstructure of the pattern, however, 'using laser light processing, the processing time required is longer, and the processing cost is still. The machining method uses a tool with different angles to define the substrate pattern of the light guide plate, and can create a pattern structure that can control the angle and shape arbitrarily. However, because the speed of the tool engraving pattern microstructure is limited by the precision and speed of the machine itself, the application of this method to the fabrication of large-sized light guide plates has the disadvantage of timeliness, so the machining method is more suitable for small-size guides. The production of light panels. In addition, machining methods still have considerable room for improvement in tool loss, compensation and correction issues. The optical lithography method uses a yellow light process technique comprising a combination of photoresist coating, exposure and development to provide a microstructure on the surface of the substrate of the light guide plate. However, the general yellow light technique utilizes a front side exposure mode, so that only a microstructure having a side surface perpendicular to the substrate surface of the light guide plate or having a small inclination angle can be formed on the dose of the photoresist absorption. However, the microstructure of the side perpendicular to the substrate surface of the light guide plate has little effect on the reflection of light. In view of the above, the present invention provides an optical lithography technique for fabricating a light guide plate structure 'by back exposure, plus changing the exposure dose and developer concentration' to smoothly produce a side surface of the substrate of the light guide plate. Tilt 10 200925683 The microstructure with a small angle 'to improve the light-emitting efficiency of the light guide plate, and the production cost of the board. Referring to Figures 2 to 4, the following is a schematic cross-sectional view of a light guide plate structure of the preferred embodiment. First, a substrate 200' is provided, wherein the substrate has an opposite surface.

Face 204. The substrate 200 is a transparent substrate. In an exemplary embodiment, the material of the substrate 〇0 may be polymethyl methacrylate (PMMA) or polycarbonate (PC). Next, (4) a photoresist 208 which is formed by spin coating to form a polymer structure is overlaid on the surface of the substrate 2 (10). In the embodiment of the present invention, when the light guide plate structure is used as a light guide plate, the material of the photoresist layer 2〇8 is selected from a transparent material, and the photoresist layer 2 〇8 is preferably a refractive index and a substrate 200. The material having a small difference in refractive index: when the light guide plate structure is used as a mold for turning over the light guide plate, the material of the photoresist layer 2〇8 may be made of a transparent material or an opaque material, and the shape thereof is Design according to the shape of the light guide plate to be made. The photoresist layer 208 can be a negative photoresist or a positive photoresist. In the exemplary embodiment, the material of the photoresist layer 208 is a negative photoresist. Next, a photomask 206 is provided, and the photomask 206 is disposed on the surface 202 of the substrate 2, so that the photomask 2〇6 and the photoresist layer 2〇8 are respectively located on opposite sides of the substrate 2 (9). The mask 206 is preliminarily provided with a pattern to be transferred. In the present invention, the photomask 206 can be directly in contact with the surface 2〇2 of the substrate 2, as shown in FIG. 2; or the photomask 206 is located above the surface 2〇2 of the substrate 2, but with the substrate. The surfaces 202 of 200 are separated by a distance and are not in contact with the surface 202 of the substrate 2A. Next, as shown in Fig. 3, the exposure light source 21 is provided above the reticle 2 〇 6 and the exposure light source 210 and the reticle 206 are positioned on the same side of the substrate 2 。. The choice of exposure source 210 depends on the photoresist layer 2〇8 employed. 11 200925683 In the exemplary embodiment, the exposure light source 21 〇 may be an ultraviolet light source. Thereafter, the exposure light source 210 is used to perform a back exposure step on the photoresist layer 208 on the other side surface 204 of the substrate 200 through the mask 206. In the back exposure step, the light emitted by the exposure light source 210 passes through the photomask 206 and the substrate 200, and then is irradiated onto the photoresist layer 2 〇8 on the other side of the substrate 200 to expose the photoresist layer. The exposed portion 212 is formed in the photoresist layer 208. By using the side exposure phenomenon and the light diffraction phenomenon of the light, the range of exposure of the photoresist layer 208 closer to the exposure light source 21〇 is enlarged, and the area of the photoresist layer 208 farther away from the exposure light source 210 is exposed. Smaller, the formed exposure portion 22 can be formed into a tapered structure, that is, a structure that tapers outward from the surface 204 of the substrate 2, as shown in FIG. In an exemplary embodiment, the exposure energy of the exposing step is preferably between substantially 6 〇 mJ/cm 2 and substantially 1200 mJ/cm 2 . In another embodiment of the present invention, as shown in Fig. 5, the substrate 200 can be further disposed on a carrier base 214 having an adjustable angle and a rotational speed function.

In addition, in an exemplary embodiment, when the photoresist layer 208 is subjected to a backside exposure process, the carrier base 214 can be adjusted, and the carrier substrate 214 is exposed to the photoresist layer 208 at an angle of inclination. In another example, in addition to tilting the carrying base 214, the carrying base 214 can be further controlled to rotate the carrying base 2i4, and in the case of rotation, the thin back surface exposure step of the photoresist layer is performed, such as Figure 5 shows. By tilting and/or rotating the substrate 200 and the photoresist layer 2〇8 and the mask 2〇8, the illumination path of the exposure light source 210 to the photoresist layer 208 can be changed, thereby changing the photoresist layer 2〇8. The light absorption path is advanced to control the slope of the tapered structure of the exposed portion 218. In still other embodiments of the present invention, as shown in FIG. 6, a lens group 216 may be disposed between the exposure light source 12 200925683 .210 and the reticle 206 (only the lens is used as the _= table). The concentrating effect of the lens group 216 can change the exposure path of the exposure light source 21, and the resist layer 2 〇 8 to thereby achieve the slope control of the side of the exposed portion 220. In the exemplary embodiment shown in Fig. 6, the number and type of lens groups 216 can be adjusted according to the process requirements, and can be only a single lens or a combination of several lenses. Next, the exposed photoresist layer 208 can be selectively baked to rearrange the exposed photoresist structures. Alternatively, the developing step of the exposed photoresist 2I 2G8 is directly performed. In this developing step, since the photoresist layer 2G8 used in the exemplary embodiment is a negative photoresist, the developing solution is removed at this time to remove the unexposed portion of the photoresist layer fan, and on the thin surface of the substrate 2 A plurality of tapered structures 222 m are formed on 〇4. The side of the tapered structure 222 has an oblique angle to the surface 2〇4 of the substrate 200, wherein the angle of inclination Θ is preferably between fi 15 . To the essence of 75. (5), better can be between the essence of 1 to 5 and the substance of 45. between. In an exemplary embodiment, the developer may be, for example, a solution containing triamylaminomethanone (THAM), and the concentration of the tris-methylcarbamate contained in the developer may preferably be between 5% and 5%. Between the actual ^ articles. After the development step is completed, a hard baking step may be selectively applied to the tapered structure to further reduce the amount of solvent contained in the tapered structure 222 to complete the fabrication of the light guide plate structure 224. In an exemplary embodiment of the invention, the hybrid structure 222 may be, for example, a conical column structure or a pyramidal column structure, such as a quadrangular pyramidal column structure, and may also be, for example, a conical structure or a corner conical structure, such as a quadrangular pyramid structure. Since the smaller the tilt angle 0 of the tapered structure 222 of the light guide plate structure 224, the greater the light intensity of the light guide plate structure 224 and the brightness can be improved, in these exemplary embodiments, by 13 200925683 • controlling the exposure energy The size is adjusted to adjust the tilt angle 0 of the tapered structure 222. Refer to Figures 7A and 7B for the exposed portion of the exposure energy at different exposure energies. The angle of inclination of the exposed portion 212a formed at a normal exposure energy (as shown in Fig. 7A) is significantly larger than the angle of inclination of the exposed portion 212b formed by the excessive exposure energy (as shown in Fig. 7B), which is a guide As the exposure energy increases, the side exposure phenomenon and the light diffraction phenomenon are enhanced. Therefore, as shown in Fig. 8, the inclination angle 5» of the tapered structure 222 of the light guide plate structure 224 is reduced as the exposure energy is increased. Further, in these exemplary embodiments, the inclination angle θ of the tapered structure 222 of the light guide plate structure 224 is controlled by adjusting the concentration of the developer. When the developer: concentration is increased, the inclination angle Θ of the formed tapered structure 222 is decreased. Referring to FIG. 9 'in the light guide plate structure 300 of another exemplary embodiment of the present invention, the substrate 3 〇 2 has opposite surfaces 3 〇 4 and 3 〇 6 , wherein the substrate 302 is a transparent substrate, and the substrate 3 The material of 〇2 can be, for example, poly(meth) methacrylate (PMMA) or polycarbonate (PC). In this embodiment, a plurality of tapered structures 308 can be formed on the substrate Q according to the process of the above embodiment. On the surface 304 of the 302, wherein the tapered structures 3〇8 are like the tapered structure 222 of the above embodiment, the tapered structures 3〇8 are mainly used to destroy the total reflection of the light incident into the light guide plate, so that the light guide plate can Light is emitted from the surface 3〇2. A plurality of concentrating structures 31 are formed on the other surface 306 of the substrate 302 in a manner similar to that used in the above embodiments. In the present embodiment, the tapered structure 308 is interspersed on the surface 3〇4 of the substrate 3〇2, and the condensing structure 31〇 is arranged on the surface 306 of the substrate 302 in a plurality of elongated concentrating structures. These concentrating structures 3 10 are composed of a transparent photoresist material, and the material of the concentrating structure 3 i 可 may be a negative photoresist or a positive photoresist. The side of the concentrating structure 31 is opposite to the substrate 306 of the layer 200925683 302 having an angle of inclination 0, wherein the angle of inclination 0 is preferably human. To the essence of 75. Between the better, it can be between the 15th. To the real ^ 45. In an embodiment of the present invention, when the light guide plate structure is used as a light guide plate, the material of the tapered structure 308 and the light collecting structure 31 is selected from a transparent material and the tapered structure 308 and the light collecting structure 31 are compared. Preferably, the light guide plate structure 300 can be used as a mold for turning over the mold when the light guide plate is made, and when the mold is used as a light guide plate for making a mold for the mold. The material of the tapered structure 3〇8 and the concentrating structure 3ι〇 may be selected from a transparent material or an opaque material, and the shape thereof is designed according to the shape of the light guide plate to be fabricated. Referring to FIG. 10, in a light guide plate structure 320 according to another exemplary embodiment of the present invention, the substrate 322 has an opposite surface 324 and a surface 326, wherein the substrate 322 is a transparent substrate, and the material of the substrate 322 can be, for example, a poly. Methyl methacrylate or polycarbonate. In this embodiment, a plurality of tapered structures 328 may be formed on the surface 324 of the substrate 322 according to the process of the above embodiment, wherein the tapered structures 328 are like the tapered structure 222 or the tapered structure of the above embodiment. 308. A plurality of concentrating structures 330 are formed on the other surface 326 of the substrate 322 in a manner similar to that used in the above embodiments. In the present embodiment, the tapered structure 328 is interspersed on the surface 324 of the substrate 322, and the concentrating structure 330 is interspersed on the surface 326 of the substrate 322 by a plurality of tapered concentrating structures. The concentrating structures 330 are composed of a transparent photoresist material, and the material of the concentrating structures 330 may be a negative photoresist or a positive photoresist. The side of the concentrating structure 3 30 has an angle of inclination to the surface 326 of the substrate 322, wherein the angle of inclination preferably ranges from substantially 15 to substantially 75. More preferably, it can be between 15° and 45°. 15 200925683 Please refer to Fig. 9 and Fig. 10 at the beginning of the month. [Because the light guide plate structure 300 and the light guide plate structure 320 are not only provided with light guiding microstructures, that is, the tapered structures 3〇8 and the tapered structures 328, and relative to these The light guide plate structure 3 of the light guiding microstructure and the other surface of the light guide plate structure 320 are further provided with a condensing function microstructure, that is, the concentrating structure 3 10 and the concentrating structure 33 〇, so the light guide plate structure The 300 and the light guide plate structure 32 have both light guiding and concentrating functions. The light guide plate structure of the exemplary embodiment of the present invention, such as the light guide plate structure 224, the light guide plate structure 300, and the light guide plate structure 320, can be applied to a backlight mode group or a liquid crystal display. Please refer to FIG. 11 , which is a schematic diagram of a device of a liquid crystal display according to an embodiment of the invention. In this exemplary embodiment, the liquid crystal display 412 mainly includes a display panel 410 and a backlight module 400. The backlight module 400 is disposed on the back of the display panel 410 to provide a backlight of the display panel 410. The backlight module 4 is mainly composed of a back plate 402, a light source 404 and a light guide plate structure 320, wherein the light guide plate structure 320 is disposed above the back plate 402, and the light source 404 is disposed on the side of the back plate 402 and Between the side of the light guide plate structure 320 and the side of the back plate 402. Light source 404 can be, for example, a cold cathode lamp or a light emitting diode strip or the like. In addition, if the inner side of the backplane ❹ 402 does not have a reflective function, the backlight module 4 can further be disposed between the light guide plate structure 320 and the bottom surface of the back plate 402* and can be in the light source 404 and the back plate. A lamp cover 408 is disposed between the sides of the 402 to cover the other side of the light source 404 with respect to the light guide plate structure 320. The reflective sheet 406 and the lamp cover 408 can reflect the light source 404 toward the bottom surface and the side surface of the back plate 402. In the backlight module 400, since the opposite surfaces 324 and 326 of the light guide plate structure 320 are respectively provided with a light guiding structure 328 and a light collecting structure 330, the light guiding plate structure 320 has a guiding light. Light and concentrating work 200925683 can, therefore, when the light guide plate structure 320 is applied in the backlight module 4 ,, the use of the conventional prism sheet and the diffusion sheet can be reduced or even eliminated, and the optical performance equivalent or even superior can be provided. Moreover, the optical quality provided by the light guide plate structure 32 is significantly better than that of the general liquid crystal display, and the number of light sources used can be reduced.

According to the preferred embodiment of the present invention, the light guide plate structure and the method for manufacturing the light guide plate mold of the exemplary embodiment of the present invention are used for fabricating the surface microstructure of the light guide plate by means of back exposure, so that the light guide plate can be smoothly formed. Forming a microstructure with an inclined angle on the surface not only improves the luminous efficiency of the light guide plate, but also saves the manufacturing cost of the light guide plate. According to the preferred embodiment of the present invention, the surface microstructure of the light guide plate structure of the exemplary embodiment of the present invention has an oblique angle, thereby greatly increasing the light extraction efficiency of the light guide plate, and improving the uniformity of the light output of the light source. The luminous efficiency of the light guide plate can be improved. According to the preferred embodiment of the present invention, in the light guide plate and the light guide plate mold structure and the manufacturing method thereof, the process method can be used to control the micro light on the light guide plate. The tilt angle of the structure can further increase the light intensity of the backlight module. According to the preferred embodiment of the present invention, in the light guide plate and the light guide plate mold structure of the exemplary embodiment of the present invention and the manufacturing method thereof, the microstructure of the light collecting function of the optical film can be integrated into the guide of the light guide plate. The smooth surface and the light-emitting surface can reduce the use of the optical film, thereby reducing the thickness of the backlight module and reducing the cost. According to the preferred embodiment of the present invention, the light guide plate structure surface of the backlight module of the exemplary embodiment of the present invention is provided with a slope-changing material light microstructure and 17 200925683 can be provided with a concentrating function microstructure at the same time. The optical film can be saved by using 'and reducing the amount of light source used', thereby reducing the cost of the backlight module and reducing the thickness and weight of the backlight module. It can be seen from the above preferred embodiments of the present invention that the thickness and weight of the backlight module of the liquid crystal display of the exemplary embodiment of the present invention can be reduced, thereby reducing the weight of the liquid crystal display and reducing the thickness of the liquid crystal display. The present invention has been described above in terms of a preferred embodiment, and is not intended to limit the scope of the present invention. Any one of ordinary skill in the art, without departing from the spirit and scope of the invention, The scope of protection of the present invention is defined by the scope of the appended claims. [Simple description of the drawing] Fig. 1 is a schematic diagram showing the structure of a general backlight module. 2 to 4 are cross-sectional views showing a process of a light guide plate structure in accordance with a preferred embodiment of the present invention. Fig. 5 is a view showing a manufacturing apparatus of a light guiding plate structure according to another preferred embodiment of the present invention. A diagram of a device for fabricating a light guide plate in accordance with still another preferred embodiment of the present invention is shown. Fig. 7 is a schematic view showing an exposure pattern at a general exposure energy according to an embodiment of the present invention. Fig. 7 is a schematic view showing an exposure pattern at an excessive exposure energy according to an embodiment of the present invention. Figure 8 is a graph showing the relationship between the exposure energy and the tilt angle of the exposed portion in accordance with an embodiment of the present invention. 18 200925683 Fig. 9 is a schematic view showing the light guide plate according to another embodiment of the present invention in accordance with the present invention. The mounting of the liquid crystal display of the stereoscopic embodiment of the light guide plate of the embodiment

Main component symbol description] 1 〇〇: backlight module 104: reflective sheet 108: lamp cover 112: cymbal π 6 : microstructure 202: surface 206: reticle 210: exposure light source 212a: exposure portion 214: carrier base 218: exposure Portion 222: Tapered Structure 300: Light Guide Plate Structure 304: Surface 308: Tapered Structure 320: Light Guide Plate Structure 324: Surface 102: Light Guide Plate 106: Light Source 110 = Diffuser Sheet 114: Back Sheet 200: Substrate 204: Surface 208 Photoresist layer 212: exposed portion 212b: exposed portion 216: lens group 220. exposed portion 224: light guide plate structure 302: substrate 306: surface 31: concentrating structure 322: substrate 326: surface 200925683 328: tapered structure 400: backlight module 404: light source 408: lampshade 412: liquid crystal display must: tilt angle 330: concentrating structure 402: back plate 406: reflective sheet 410: display panel 0: tilt angle

20

Claims (1)

200925683 A light guide plate structure comprising at least: a substrate having a first surface and a second surface; a plurality of tapered structures disposed on the first surface of the substrate, wherein each of the tapered structures One side has an oblique angle to the first surface of the substrate; and 'the plurality of light collecting structures are arranged on the second surface of the substrate. 2. The light guide plate structure of claim 1, wherein the substrate is a transparent substrate. 3. The light guide plate structure of claim 2, wherein the material of the substrate is selected from the group consisting of polymethyl methacrylate (pM and polycarbonate (PC). The light guide plate structure according to claim 2, wherein the tapered structures and the light collecting structures are formed of a transparent material. 5. The light guide plate structure according to claim i, The two-cone structure and the concentrating structure are formed by a negative photoresist. 6. The light guide plate structure according to the item i of claim 1 is biconical, and the structure is positive with the concentrating structures. The light guide plate structure according to claim 1, wherein the inclination angle is between substantially 15 and substantially 75. ', 8. If the patent application scope The light guide plate structure according to Item 1, wherein the inclination angle is between substantially 15 and substantially 45. 9. The light guide plate structure according to the above-mentioned claim, wherein the tapered structures are plural Conical column structure or a plurality of pyramidal column structures. ❹ 1〇_If applying The light guide plate structure according to the above item, wherein the tapered structures are a plurality of conical structures or a plurality of pyramid structures. 11_ The light guide plate structure according to the item [i] of claim 1, wherein the concentrating light The structure is a plurality of strip-shaped concentrating structures. 12. The light guide plate structure according to claim 1, wherein the concentrating structures are a plurality of tapered concentrating structures. The light guide plate structure is a light guide plate structure according to the item i, wherein the light guide plate structure is a mold for making a light guide plate. 15. A method of fabricating a light guide plate structure, comprising at least: 22 200925683 * providing a transparent substrate 'where the transparent substrate has a first surface and a second surface; forming a photoresist layer on the transparent substrate Providing a reticle on the second surface of the transparent substrate, and the photoresist layer is located on opposite sides of the transparent substrate; and transmitting the photoresist layer through the reticle An exposure step; and a developing step to remove a portion of the photoresist layer to form a plurality of tapered structures. The method of fabricating a light guide plate structure according to claim 15 wherein the transparent The material of the substrate is selected from the group consisting of polymethyl methacrylate formazan and oleic acid vinegar. Π · The method for manufacturing the light guide plate structure according to claim 15 of the patent The material of the photoresist layer is a transparent material. 18. The method of fabricating the structure of the light guide plate according to claim 15 of the invention, wherein the material of the photoresist layer is a negative photoresist. For example, in the scope of the patent application, the second surface of the reticle and the second substrate of the illuminating plate structure of the ninth embodiment of the illuminating device is directly connected to the manufacturing method of the light guiding plate structure according to claim 20 of the patent application scope of The step of providing the number of the second substrate is at least comprising disposing the transparent substrate on a carrying base, and the carrying base has a function of adjusting an exposure angle. A method of manufacturing a light guide plate structure as described in claim 21, wherein the step of performing the exposure step comprises at least tilting the carrier base by an angle. .23. The method of manufacturing a light guide plate structure according to claim 22, wherein the performing the exposure step comprises at least rotating the carrier base. The method of fabricating a light guide plate structure according to claim 15, wherein the reticle is not in contact with the second surface of the transparent substrate. Φ ^ 25. The method of grading a structure of a light guide plate according to claim 15, wherein the exposure energy of the exposure step is between substantially 60 mJ/cm 2 and substantially 1200 mJ/cm 2 . The method of determining the structure of a light guide plate according to claim 15, wherein the developing step utilizes a developing solution and the concentration of the dihydroxyaminomethane (THAM) contained in the developing solution is substantially 0.5%. Between the actual and 12.5%. The method of manufacturing the light guide plate structure according to claim 15 is characterized in that, between the step of providing the photomask and the exposing step, at least a lens & is disposed between the exposure (4) Between the exposure light source and the reticle. 28. The method of fabricating a light guide plate structure according to claim 15, wherein one side of each of the tapered structures has an oblique angle to the first surface of the transparent substrate. 29. The method of fabricating a light guide structure according to claim 28, wherein the tilt angle is substantially 15. To the essence of 75. between. 30. The method of manufacturing a light guide plate structure according to claim 28, wherein the inclination angle is substantially 15 . To the substance of 45. between. 〇 3 h The method of fabricating a light guide plate structure according to claim 15 wherein the tapered structures are a plurality of conical column structures or a plurality of pyramidal crucible structures. The method of manufacturing a light guide plate structure according to the invention of claim 1, wherein the tapered structures are a plurality of conical structures or a plurality of pyramid structures. 33. The method of fabricating a light guide plate according to claim 15 of the invention of claim 15 200925683 - after the developing step, at least comprising performing a hard baking step. 34. The method of fabricating a light guide plate structure according to claim 15, wherein after the developing step, at least comprising forming a plurality of light collecting structures on the second surface of the transparent substrate. 3. The method of fabricating a light guide plate structure according to claim 34, wherein the concentrating structures are a plurality of elongated concentrating structures. ❹ 36. The method of fabricating a light guide plate structure according to claim 34, wherein the concentrating structures are a plurality of tapered concentrating structures. 37. The method of fabricating a light guide plate structure according to claim 34, wherein the material of the light concentrating structures is a negative photoresist. 38. The method of fabricating a light guide plate structure according to claim 34, wherein the material of the light concentrating structures is a positive photoresist. The method of fabricating a light guide plate structure according to claim 34, wherein one side of each of the light collecting structures has an inclined angle to the second surface of the transparent substrate. 4. A method of manufacturing a light guide plate structure as described in claim 39, wherein the inclination angle is substantially 15. To the essence of 75. between. 26 200925683 41. The method of manufacturing, the method of manufacturing the light guide plate according to claim 15 wherein the light guide plate structure is a light guide plate. The method for manufacturing a light guide plate structure according to claim 15, wherein the light guide plate structure is a mold for the light guide plate. Φ 44. A backlight module, comprising: at least: a backplane; a light guide plate disposed on the backplane, and the light guide panel comprises at least: a transparent substrate having a first surface and a second surface And a plurality of tapered structures disposed on the first surface of the transparent substrate, wherein one side of each of the tapered structures has an oblique angle to the first surface of the transparent substrate; © a plurality of concentrating structures Arranging on the second surface of the substrate; and at least one light source disposed on a side of the back plate. The backlight module of claim 44, wherein the material of the transparent substrate is selected from the group consisting of polymethyl methacrylate and polycarbonate. 46. The backlight module of claim 44, wherein 27 200925683 the tapered structures are formed by a negative photoresist. 47. The backlight module of claim 44, wherein the tapered structures are formed of positive photoresists. 48. The backlight module of claim 44, wherein the tilt angle is substantially 15 degrees. To the essence of 75. between. 49. The backlight module of claim 44, wherein the tilt angle is substantially 15 degrees. To the substance of 45. between. 50. The backlight module of claim 44, wherein the tapered structures are a plurality of conical column structures or a plurality of pyramidal column structures. The backlight module of claim 44, wherein the tapered structures are a plurality of conical structures or a plurality of pyramid structures. 52. The backlight module of claim 44, wherein the concentrating structures are a plurality of strip-shaped concentrating structures. 53. The backlight module of claim 44, wherein the concentrating structures are a plurality of conical concentrating structures. 54. The backlight module of claim 44, wherein the materials of the concentrating structures are photoresist. The backlight module of claim 44, wherein the backlight module does not include a cymbal and a diffusion sheet. The liquid crystal display comprises at least one backlight module comprising at least: a back plate; a light guide plate disposed on the back plate; and the light guide plate comprises at least: a transparent substrate having a first surface and a second surface; and a plurality of tapered structures disposed on the first surface of the transparent substrate, wherein one of the sides of the tapered structures is opposite to the transparent substrate The first surface has an inclined angle; a plurality of light collecting structures are arranged on the second surface of the substrate; and at least one light source is disposed on a side of the back plate; and a display panel is disposed on the backlight module Above the light guide plate. The liquid crystal display of claim 56, wherein the material of the transparent substrate is selected from the group consisting of polymethyl methacrylate and polycarbonate. The liquid crystal display according to claim 56, wherein the tapered structures are negative-type photoresists, and the liquid crystal display device of claim 56, wherein the The tapered structure is composed of a positive photoresist. The liquid crystal display of claim 56, wherein the tilt angle is substantially 15 degrees. To the essence of 75. between. 61. The liquid crystal display of claim 5, wherein the tilt angle is substantially 15 degrees. To the substance of 45. between. 62. The liquid crystal display of claim 1 wherein the tapered structures are a plurality of conical column structures or a plurality of pyramidal column structures. The liquid crystal display of claim 100, wherein the tapered structures are a plurality of conical structures or a plurality of pyramid structures. 64. The liquid crystal display of claim 56, wherein the concentrating structures are a plurality of elongated concentrating structures. 65. The liquid crystal display of claim 56, wherein the materials of the concentrating structures are photoresist. 66. The liquid crystal display of claim 56, wherein the concentrating structures are a plurality of conical concentrating structures. The liquid crystal display of claim 56, wherein the backlight module does not include a cymbal and a diffusion sheet. ❹ 31