TW200420974A - Light guide plate and method of fabricating the same - Google Patents

Abstract

A light guide plate includes a light incident surface for receiving light, first and second light emission surfaces for emitting light at a first light emission angle with respect to the first and second light emission surfaces, and a light reflection pattern formed on the first light emission surface, for reflecting the light toward the second light emission surface. The reflected light from the light reflection pattern exits the second light emission surface at a second light emission angle with respect to the second light emission surface, and the second light emission angle is larger than the first light emission angle. The light reflection pattern includes multiple dots each having a prim pattern on their surface and light reflecting surfaces elongated in a selected direction. The adjacent light reflecting surfaces meet each other at their elongated edges to form a prism shape.

Description

200420974 发明. Description of the invention: I: the technical field of the inventors 3 1. Field of the invention The present invention relates to a flat plate that guides light to travel therein, and more particularly to a device for providing a uniform brightness distribution. A light light guide plate for use in an image display device and a method for manufacturing the light guide plate. [Prior Art 3 2. Description of Related Technology 10 A light guide plate is generally used in a light device or a backlight unit, and guides light to a display device in an image display device. In a display device such as a liquid crystal display (LCD), a light guide plate is used to guide and adjust a path of light provided by a light source to generate light having a uniform brightness distribution. Since the liquid crystal in the LCD device does not emit light, the light is generated by the light source and then supplied to the liquid crystal through the light guide plate. An LCD device generally includes a device for displaying an image, a device for controlling a liquid crystal, and a device for supplying light. The liquid crystal control device controls the transmission of light in the liquid crystal by applying an electric field to the liquid crystal molecules. In other words, applying an electric field to the liquid crystal molecules ' LCD devices such as liquid crystals are used to control the passage of light because they are expected to respond to current. The device for supplying light is provided to the liquid crystal with light having uniform brightness. The light supply device has a light source for generating light and a light guide plate. Basically, a light source in a device supplying light produces a non-uniform optical distribution line 5 200420974. Therefore, the light guide plate converts the light into planar light having a uniform optical distribution to be provided to the liquid crystal. However, the conventional conventional light guide plate has disadvantages such as reducing the brightness of a display panel of an LCD device. In order to increase the brightness, various types of light guide plates have been developed, such as having diffuse points on their reflective surfaces to increase the amount of light leaving the light guide plate, which is known to those skilled in the art. Likewise, the travel of light in the light guide plate may be reflected by one surface of the light guide plate and leave from the other surface of the light guide plate. At this time, according to Snell's law of refraction, the light leaving the light guide plate cannot have an angle of departure from the surface of the light perpendicular to the light guide 10 guide plate. This causes a decrease in the brightness of the display panel of the LCD device. In order to make the light exit angle larger (ie close to 90 scoops), the conventional light supply device uses various types of optical sheets on the light guide plate. For example, a diffusion sheet is placed on the light guide plate to increase The light exit angle, and further placing the cymbal sheet on the diffusion sheet to increase the light exit angle of the diffusive sheet. Although the diffusive sheet and the cymbal sheet can promote the display of the LCD device The brightness of the panel, they can cause problems such as: increasing the total weight and volume of the LCD, and adding extra components to increase the manufacturing cost of the LCD device. 20 Therefore, the demand for the light guide plate is: The brightness of the display panel is maximized without increasing the number of components of the LCD device. Furthermore, its advantage may be a method of manufacturing the light guide plate in a simpler step and in a mass production step. 6 ί Sun and Moon Within 3 Inventions The above and other shortcomings in the conventional technology can be overcome or improved by the light guide plate of the present invention and the LCD device using the light guide plate. In a specific embodiment, the light guide plate of the present invention Including a light incident surface for receiving light; first and second light emitting surfaces for emitting light at a first light emitting angle corresponding to the first and second light emitting surfaces; and formed on the first emitting surface The light reflection pattern on the light reflection pattern is configured to reflect light toward the second light emission surface. The light reflected from the light reflection pattern leaves the second light emission surface at a second light emission angle corresponding to the second light reflection surface. The second light emission angle is preferably larger than the first light emission angle. In addition, the light reflection pattern may include a plurality of dots having a regular pattern on the surface thereof. The dots may have different sizes so that the dots are away from the light incident surface The farther the point is, the larger the point. The light reflection pattern may have different point densities in different regions of the first light emitting surface, so that the light reflection pattern is in a region closer to the light incident surface and the point density of the region. Larger. This point has a light reflecting surface extending in the -selected direction, where those adjacent to the light reflecting surface meet each other at the extended edge of the adjacent light reflecting surface to be between adjacent reflecting surfaces In another embodiment of the present invention, it is a backlight assembly for providing light with uniform brightness. The backlight assembly includes the light guide plate described above; a light source for providing light to the The light incident surface of the light guide plate; and a storage container for receiving the light guide bow plate and the light source. The backlight assembly may also include a second light source, which is provided by the second light incident table 200420974 surface of the light guide plate. In this example, the dots of the light reflection pattern may have different sizes, such that the dots are smaller as the dots are closer to one of the light incident surfaces. In another embodiment, the LCD device is used to display an image. The LCD device includes the above-mentioned backlight assembly; a display panel for receiving light from the backlight assembly to display an image; and a base for fixing a display panel having the backlight assembly. In another specific embodiment The die casting device is used for manufacturing the light guide plate. The mold casting device includes a lower mold having a plurality of recessed holes respectively corresponding to points of the light reflection pattern; and an upper mold having 10 side walls that can be combined with edges of the lower mold to form the upper mold. A space in the lower mold; and an injection port for injecting a hardenable material into the space. The invention also provides a method for manufacturing the light guide plate. The method includes the following steps: preparing a body of the light guide plate having a surface including a light incident surface and a light emitting surface; placing a pattern mask on the first light emitting surface, wherein the pattern mask has a plurality of Openings; filling the openings with a fluid material, first hardening the material; removing the pattern mask to form a plurality of points of the first hardening material; forming a pattern on the surface of the points of the first hardening material; and The dots of the first hardening material are second hardened to form a solid dot having the pattern. The method also includes the following steps: dispersing and arranging 20 materials placed on the pattern mask to flatten the surface of the material of the pattern mask, and forming openings of the pattern mask of different sizes, so that the opening size is equal to the opening The distance from the light incident surface of the body is inversely proportional. In another aspect of the present invention, a method for manufacturing a light guide plate includes the following steps: preparing a body of the light guide plate 'the surface of the body has a surface including 8 200420974 light incident surface and a light emitting surface; The roller on the first light emitting surface of the body forms a pattern with recessed holes; the recessed holes are filled with a fluid material, and the fluidized material is first hardened; rolling the roller to advance it, Causing the first hardened material to be separated from the recessed holes and forming 5 majority of the points of the first hardened material on the first light emitting surface; and second hardening the points of the first hardened material to form having the Patterned solid dots. The method may further include the step of forming a 稜鏡 -shaped extension surface on the surface of the point, the 稜鏡 -shaped extension surface reflecting light from the light incident surface toward the second light emitting surface. 10 With the above features of the light guide plate of the present invention, one or more of the cymbal sheets required for the conventional LCD device are no longer needed in the LCD device of the present invention, and the conventional LCD device is The display deterioration caused by the light interference such as the moiro phenomenon between the panels can also be effectively eliminated in the LCD device of the present invention because the prism sheet material is not required in the LCD device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The disclosure of the present invention will be described in the following specific embodiments, with reference to the following drawings, wherein: FIG. 1 is a schematic representative diagram of a light guide plate according to a specific embodiment of the present invention. Figures 2A and 2B are schematic diagrams illustrating light reflection patterns of a light guide plate according to a specific embodiment of the present invention; Figure 3 is an enlarged view of part B in Figures 2A and 2B; 9 200420974 Figure 4 is the first 3 is a representative view of the point; FIG. 5 is an enlarged view of part C in FIG. 4; FIG. 6 is a schematic diagram illustrating a light reflection pattern according to a specific embodiment of the present invention; A schematic diagram of a light traveling path in a light guide plate body; FIG. 8 is a schematic diagram showing a light reflection pattern according to another embodiment of the present invention; FIG. 9 is a diagram illustrating another embodiment of the present invention 10 is a schematic diagram of a light reflection pattern; FIG. 10 is a diagram showing a reflection pattern of another embodiment of the present invention; FIG. 11A is a diagram showing a reflection pattern of another embodiment of the present invention, FIG. 11B Cross-section of point 稜鏡 in Figure 11A FIG. 11C is a cross-sectional view of a point of another specific embodiment of the present invention; FIG. 12 is a schematic diagram illustrating a light reflection pattern of another specific embodiment of the present invention, FIG. A schematic view of the light guide plate body and the pattern mask placed thereon; FIG. 13B is a top view of the pattern mask in FIG. 13A; FIG. 13C illustrates a step of depositing material on the pattern mask; FIG. 13D The figure shows the step of filling the opening of the pattern mask with material; 10 200420974 Figure 13E shows the first hardening step of the material in the opening; Figure 13F shows the step of removing the pattern mask; Figure 13G shows the Step of forming a pattern on the first hardened material point; FIG. 14A shows a method for manufacturing a light 5 guide plate according to another embodiment of the present invention; FIG. 14B is a front view of the pattern forming unit in FIG. 14A Figures 15A and 15B are schematic cross-sectional views of a mold casting device for manufacturing a light guide plate according to the present invention; Figure 16 is a 10 schematic diagram illustrating a backlight assembly according to a specific embodiment of the present invention; Figure 17B shows the calculation in the 16th The brightness of the light guide plate; FIG. 18 is a schematic diagram illustrating a light guide plate applicable to the backlight assembly in FIG. 16, and FIG. 19 is a schematic diagram illustrating another specific embodiment of the present invention FIG. 20 is a schematic view illustrating a backlight assembly according to another embodiment of the present invention; and FIG. 21 is an exploded view of a liquid crystal display (LCD) device according to a specific embodiment of the present invention perspective. 20 I: Embodiment 1 Detailed Description of the Invention A detailed description of the present invention is disclosed herein. However, the specific structural and functional details disclosed herein are only for the purpose of describing the preferred embodiment of the present invention. Fig. 1 is a schematic representation of a light guide plate according to a specific embodiment of the present invention. The light guide plate 700 has a body 710 having a plurality of surfaces, and the number of the plurality of surfaces depends on the shape of the body. In other words, the body 5 may be in the shape of a triangular plate having three side surfaces (except for the upper and lower surfaces), the shape of a rectangular plate having four side surfaces, or having four or more side surfaces Polygonal plate shape.

For example, in this specific embodiment, the body 710 is a hexahedral shape, and includes a first surface 714 and a second surface 716 opposite to each other, and a side surface 712 through which the applied light enters from the outside. The light incident on the light incident surface 712 enters the body 710, and mainly exits through the first surface 714 and the second surface 716 which are not necessarily parallel to each other. Light travels differently in the body 710, leaving from the first surface 714 or the second surface 716 depends on whether it conforms to Snell's law of refraction. The light leaving through the first surface 714 or the second surface 716 may be at various angles corresponding to the first surface 714 and the second surface 716. For example, the light leaves the light guide plate 700 at an angle corresponding to the first surface 714 or the second surface 716 as the emission angle 01. The light emission angle 01 is one of the factors determining the efficiency of the light guided by the light guide plate 700. Through experiments including computer simulation, it has been proved that in a display device using the light guide plate 700 20, when the light leaving through the first or second surface becomes perpendicular to the corresponding surface (that is, the light emission angle approaches 90 °) The brightness of the light can be increased. In contrast, the brightness of the display device decreases when the emitted light is parallel to the corresponding surface (i.e., the light emission angle approaches 0 °). The light guide plate 700 also has a light path for adjusting the light path in the body 710 and 12 200420974

Light emission angle pattern 720. In other words, the pattern 720 is designed to reflect light from the light incident surface 712, while the reflected light leaves the second emission surface 716 at an emission angle greater than the emission angle θ1. It is assumed that if the light guide plate does not have such a pattern 720 and a display panel is placed on the second surface 716, the light from the first surface will inevitably be reduced, which is useless for a display. In the present invention, since the pattern 720 of the light guide plate 700 has the functions of reflecting light and adjusting the light path, the light efficiency of the display device using the light guide plate 700 can be effectively increased. As shown in FIG. 1, the pattern 720 has the shape of a spot 721 formed on the first surface 714. Note that the display panel (not shown) is assumed to be placed on the side of the second surface 716. Similarly, it is also assumed that the display panel is placed on the side of the first surface 714, and the light reflection pattern 720 may be formed on the second surface 716.

The light provided by the transmitted light incident surface 712 is reflected by the light reflection pattern 720, and the reflected light leaving through the reflection surface 716 has a light emission angle θ2 corresponding to the second surface 716. For the sake of explanation, the emission angle θ2 of light reflected by the first surface 714 and passing through the second surface 716 is referred to as "first light emission angle Θ!" The emission angle ㊀2 of the light of 716 is called "second light emission angle θ2". Each edge 20 of the light reflection pattern 720 has a specular point 721 having a light reflecting surface which forms one or more ridges at each point. The angles of these light reflection patterns 720 are designed to reflect light such that the second light emission angle ㊀2 is larger than the first light emission angle. In other words, the second emission angle ㊀2 is adjusted via the light reflection pattern 720 so that the light efficiency leaving the second surface 716 is maximized. The following is a detailed description of the light reflection pattern 72. Fig. 2A is a schematic diagram illustrating a light reflection pattern according to a specific embodiment of the present invention. The black light reflection pattern 720 is formed on the first surface 714 of the light guide plate 700 and has a plurality of black dots 721 each having a flat plate shape with a selected thickness of 5 degrees. The spot 721 may also have various shapes, such as a circle, a rectangle, or a polygon. For example, in this specific embodiment, the spot 721 is circular. In this specific embodiment, the spot 721 is substantially the same size and has different densities in different regions on the first surface 714. The term "density" is defined herein as the size of a cumulative area in which a point is formed in a unit area (axb in Fig. 2A). Therefore, the greater the number of points in a unit area ', the greater the density of points in the unit area. In the specific embodiment of FIG. 2A, the number of vertices 721 of each unit area varies depending on the position of the calculated area. The number of 稜鏡 points 721 per unit area increases in inverse proportion to the amount of light reaching the different area. In other words, in the area close to the light incident surface 712, the light reflection pattern 720 of each unit area has fewer pips 721 (i.e., lower density); in the area farther from the light incident surface 712, each The number of ridge points 721 per unit area is large (ie, higher density). As shown in Figure 2A, there are single-prism points 72b in the unit area (axb) near the light incident surface 712 and four or more 稜鏡 in the same unit area (axb) 20 away from the light incident surface 712. Point 721. Similarly, the number of prism spots 721 is gradually changed according to the position of the area where the light reaches from the light incident surface 712, so that the light leaving the second surface 716 has a uniform brightness. As shown in Figure 2B, the dots 14 200420974 72la formed on the light reflection pattern 72〇a have different sizes depending on the position of the area on the first surface 714. The different sizes of the prism dots make the density of a single area the greater the unit area is from the light incident surface 712; in the same way, the smaller the density of a single area, the closer the unit area is from the light incident surface 712. In this embodiment, since the density of 5 points is controlled by the formation of points with different sizes, the area far from the light incident surface 712 has a large point and is close to the light incident surface 712. Has a smaller spot.

Therefore, in the light reflection patterns 720 and 720a of Figs. 2A and 2B, the density change at a point in a unit area is related to the amount of light reaching the unit. The area that receives more light has a smaller dot density, and the area that receives less light has a larger prism dot density.

Figure 3 is an enlarged view of part B in Figures 2A and 2B. Fig. 4 is a representative diagram of the point along the line A_A in Fig. 3. Referring to FIGS. 1 to 4 together, the following is a detailed description of the points of the light reflection pattern. The spot 721 has one or more light reflecting surfaces 725 to reflect light emitted from the light incident surface to the second surface 716. The light reflected by the light reflecting surface 725 and passing through the second surface 716 has a second light emission angle ㊀2, which is larger than that reflected by the first surface 714 (non-point 721) and passing through the second surface 716. The first light emission angle of the light. 20 The light reflecting surface 725 forms a jagged ridge, which is a first light reflecting surface 722 and a second light reflecting surface 724, respectively, as shown in FIG. 5 and the enlarged view of part C in FIG. 4. The first light reflecting surface 722 and the second light reflecting surface 724 meet each other to form an angle θ3. The range of Θ3 between the first light reflecting surface 722 and the second light reflecting surface 724 is about 80. To about 120. The second light emission 15 200420974 angle θ2 is larger than the first light emission angle 〇1. In particular, the angle Θ3 is about 82. To about 84. (More particularly at about 82.5.), The second light emission angle 02 becomes about 90. , So that the brightness of the display panel is maximized. Similarly, the light reflecting surface 725 is formed to have a regular pattern such that the jagged ridge has a slope of approximately 5 (ie, the distance between adjacent prisms), for example, from about 20 μm to about 2 〇〇μπι. Therefore, the light guide plate 700 with the light reflection pattern 72 of the present invention provides a display panel with light substantially perpendicular to the surface of the light guide plate 700, so that the light efficiency and brightness of the display panel can be achieved without additional Diffuse and / or rubbing sheet to increase. 10 Generally, the prism sheet and the diffuser sheet in the light guide plate are used to adjust the path of light leaving the light guide plate, and the purpose is to enhance the light efficiency and brightness of the display panel. In the present invention, since the light system leaving the second surface 716 of the light guide plate 700 is adjusted by the light reflection pattern 720 to have a value corresponding to about 90. The light emission angle ㊀2, the 稜鏡 and / or the diffuser sheet is no longer needed to increase the brightness and / or light efficiency in the display panel receiving light from the light guide 15 plate 700. Fig. 6 is a schematic diagram illustrating a light reflection pattern of a specific embodiment of the present invention. In the light reflection pattern 726, a light reflection surface? The alignment direction of 25 and the incident direction of light incident on the surface 712 are 20 factors that determine the brightness of the display panel. The condition for increasing the brightness is that the light system is directed at the surface π with # and the light reflecting surface 725 is extended and aligned in the Υ direction. In other words, when the light reflection pattern appears to have a point and a diffusive surface aligned with the-direction, the direction is substantially perpendicular to the direction in which light is provided to the light-emitting surface 712. The light guide plate 726 completely receives light from the display surface 16 200420974 The plate has increased brightness.

Figure 7 shows the light guide plate body? A schematic diagram of the travel path of the light in 10. The light incident on the side surface 712 is reflected from the first surface 714, the second surface 716, and most of the side surfaces including the light incident surface 712, so that the light has different traveling paths in the 5 body 7 pairs. Some of the different light paths do not reach the puppet point, so light is not reflected from the puppet point to the second surface 716. This light, which is not reflected by the dots, causes a loss of light, causing a decrease in the brightness of the display panel. Such light loss can be avoided by using a light guide plate having a light reflection pattern 726 and a light reflection surface 725 aligned with the horizontal direction of the light incident surface 712.

Fig. 8 is a schematic diagram showing a light reflection pattern according to another embodiment of the present invention. The light reflection pattern 728 basically has two pattern types: a first light reflection pattern 620 and a second light reflection pattern 63. The first light reflection pattern 620 includes individual dots each having a light reflection surface 625 that is extended and aligned in parallel with the light incident surface 712. The first light reflection pattern 620 reflects light passing through the light incident surface 712 and toward the second surface 716 at the light emission angle 光 2 (see FIG. 1). The second light reflection pattern 630 includes prism points each having a light reflection surface 635 that is extended and aligned in parallel with the light incident surface 20 712. The second light reflection pattern 630 reflects light toward the second surface, and the light is not reflected by the first light reflection pattern 620. The light reflecting surfaces 635 of the second light reflecting pattern 630 may be aligned regularly in a selected direction or irregularly in different directions. Therefore, for example, the first light reflection pattern 620 and the second light reflection pattern 630 17 200420974 are aligned so that the light reflection surface 625 of the light reflection pattern 620 is aligned with the light incident surface 712 in parallel, and the light reflection surface 635 of the light reflection pattern 630 The direction of the light incident surface 712 is arbitrarily and independently aligned. Similarly, the dots of the light reflection pattern 620 are uniformly arranged in a matrix, and the dots of the light reflection pattern 5 630 are arranged so that the prism points of the light reflection pattern 630 are placed on the adjacent light reflection pattern 620 Between the puppet points. Therefore, if most cymbals are used in addition to the light guide plate, these light reflection patterns 620 and 630 can produce the same effect.

Fig. 9 is a schematic diagram illustrating a light reflection pattern 10 according to another embodiment of the present invention. The light reflection pattern 729 also has two pattern types: 620 and 632. The first light reflection pattern 620 is the same as that shown in the specific embodiment in FIG. 8. That is, the 'first light reflection pattern 620 has a light reflection surface 625 aligned in parallel with the light incident surface 712. The second light reflection pattern 632 of this embodiment includes a spot having a light reflection surface 637 that is extended and aligned substantially vertically with the light incident surface 712. In other words, the light reflection surface 637 of the light reflection pattern 632 is aligned in the X direction, and the light reflection surface 625 of the light reflection pattern 62 is aligned in the Y direction. Therefore, the alignment directions of the light reflection surfaces 625, 637 of the first light reflection pattern 62 and the first light reflection pattern 632 are substantially perpendicular to each other. This also provides a similar effect if the two cymbals are used such that the cymbals 20 of the respective cymbals are perpendicular to each other. In this specific embodiment, the points of the first light reflection pattern 620 are arranged in a matrix, and the points of the second light reflection pattern 632 are individually inserted into adjacent points of the first light reflection pattern 620. Between points. The dots of the first light reflection pattern 620 and the second light reflection pattern 632 may be substantially the same size or different sizes. For example, the point of the second light reflection pattern 632 is smaller than the point of the first light reflection pattern 620, as shown in FIG.

Fig. 10 is a schematic diagram illustrating a reflection pattern according to another embodiment of the present invention. The light reflection pattern 730 of this embodiment includes individual dots each having a light reflection surface 735, and the light reflection surface 735 is extended and aligned in different directions. For example, each of the light reflecting surfaces 735 has at least one curved portion. In particular, each of the points of the light reflection pattern 730 has a cross-shaped pattern, so that the light reflecting surface 735 is individually curved to have an L shape, and the L-shaped light emitting surface 735 is a quarter of the point. The circle comes continuously. It should be noted that the L-shaped light reflecting surface 735 is exemplified by the point 稜鏡 in the figure 10, and the light reflecting surface of the prism point may have a different shape, such as a sawtooth surface or a combination thereof. In this specific embodiment, the advantage is that the pips can be arranged independently between the light reflecting surface and the light surface in a relation of directions. When light is provided to the four side surfaces of the 15 body 710, light having a curved light reflecting surface 735

The reflection pattern 730 effectively reflects light to the display panel. In other words, the light reflected by the light reflection pattern 730 leaves the light guide plate at approximately 90. The increased light emission angle is toward the display panel. This is because each point of the light reflection pattern 73 has a light reflection 20 surface 735 whose alignment direction is individually perpendicular to a corresponding one of the light incidence directions. Fig. 11A is a schematic diagram illustrating a reflection pattern according to another embodiment of the present invention. The light reflection pattern 740 of this embodiment includes the dots of the light reflection surface 745 having a concentric circle shape. For example, each point has a multiple concentric circular light reflecting surface 745, as shown in Fig. 11A. Since the light reflecting surface 745 19 200420974 is circular (that is, a continuously curved shape), it reflects uniformly distributed light regardless of the direction of light provided from the light incident surface 712. Therefore, the light reflection pattern 74 should add light efficiency and brightness to the display panel. Fig. 11B is a cross-sectional view taken along line D-D 'of Fig. 11A. In this specific embodiment, each spot has a light reflecting surface formed on the first surface 714 in a convex shape. Similarly, the pips may each have a light reflecting surface 746 formed in a convex shape on the first surface 714, as shown in FIG. 11C. The above-mentioned light reflection pattern is integrally formed on the first surface 714. The point with a light reflecting surface is integrally connected to the body of the light guide plate. A method of forming the light reflection pattern will be described in detail as follows. In contrast, the light reflection pattern can be an independent layer, and the independent light reflection pattern is attached to a surface of the light guide plate. Fig. 12 is a schematic view illustrating a light reflection pattern sticker 15 attached to a light guide plate according to another embodiment of the present invention. The light reflection pattern 760 is independently formed so as to have one of the shapes as described in FIGS. 1 to 11C above. In other words, the light reflection pattern 760 has a dot, which has a light reflecting surface having the same shape as that of the above-mentioned embodiment. The independent light reflection pattern 760 is attached to the first surface of the light guide plate body 710 using, for example, an adhesive. 20 The reflection pattern 6G has a refractive index substantially equivalent to that of the light guide plate body 710. For example, the light reflection pattern 760 and the body 710 may have the same refractive index. In the above-exemplified embodiments, different structural forms of the light guide plate according to the present invention have been described. The following is a detailed description of manufacturing the light guide plate of the present invention. 20 200420974 Description In order to manufacture the light guide plate, it is necessary to prepare the body of the light guide plate. The body is formed to have surfaces such as first and second surfaces facing each other, and light is incident on at least one side surface. The first and second surfaces 5 are connected to the at least one side surface to form a three-dimensional space body. The body having this type of evil can be made of synthetic resin using a mold. A light reflection pattern is formed on one of the first and second surfaces, as shown in Figs. 1 to 12.

Fig. 13A is a schematic view illustrating a light guide plate body 71 and a pattern mask 761 placed thereon. The pattern mask 761 has a specific pattern for forming a light reflection pattern on the 10 body 710. In this embodiment, since the light reflection pattern is formed on the first surface 714, the body 710 is placed on the substrate 717 so that the second surface 716 is opposite to the first surface 714. Next, a pattern mask 761 is placed on the first surface 714.

FIG. 13B is a top view of the pattern mask 761 in FIG. 13A. The pattern 15 mask 761 has a mask body% la and a plurality of openings 761b formed in the mask body 761a. The mask body 761a has a size and shape corresponding to the light reflection pattern, and each of the openings 761b has a size, shape, and position corresponding to a point of the light reflection pattern. For example, the openings 761b may be the same size or take into account different size variations of light incident on the light guide plate. 20 After the pattern mask 761 is placed on the first surface 714 of the body 71, a material 762 as a light reflection pattern is placed on the pattern mask 761, as shown in FIG. 13C. The material 762 as a light reflection pattern, such as an XJV (ultraviolet light) hardenable material, can be hardened by UV rays. The 17 ^ hardenable material 762 can also have fluidity and adhesion properties. 21 200420974 Fig. 13D shows a step of filling the opening 761b of the pattern mask with a UV hardenable material 762. The squeegee 763 is used to disperse the configured UV-curable material 762 so that the opening 761b is filled with the discontinuously formed UV-curable material 762a. The squeegee 763 moves along the upper surface of the pattern mask 761 so that the UV-curable material 762a filling the opening is at the same level as the upper surface of the pattern body 761a.

After completing the step of filling all the openings 761b with the UV-hardenable material 762a, UV rays are irradiated on the surface of the pattern mask 761 having the UV-hardenable material 762a, as shown in Fig. 13E. UV rays harden the UV-curable material 10% 2a, so that the opening 761b is filled with the first hardening material 762b. The degree to which the UV rays are irradiated onto the pattern mask 761 is such that the first hardened material 762b has sufficient hardness, and no deformation occurs when the pattern mask is removed from the surface of the body 71. After the first hardening material 762b is formed, the pattern mask 761 is peeled from the first surface 714 of the body 15 710. Therefore, the first hardened material %% remains in the first

On one surface 714, as shown in Fig. 13F, a plurality of points 76k are formed on the first surface 714. The first hardened material point 762c remaining on the first surface 714 without any deformation is due to the hardness obtained by the irradiation of UV rays. The 13G chart does not form a pattern on the first hardened material point 762c. In this embodiment, the pattern printer 763 is used to print a black pattern on the upper surface of each dot 762c. The pattern printer 763 has a roller 763a with a 稜鏡 pattern 763 (: a rotating device 763b for rotating the roller 763 &), and a UV ray irradiator 763d for irradiating 11 ¥ rays. It is formed on the roller 763a. The cymbal pattern 76 on the surface allows the cymbal with a zigzag cross section through the mounting tool 22 200420974. After the rotation device 763b is rotated, the roller 763a and the pattern printer 763 are advanced, and the first hardening is pressed with the cymbal pattern 763c. The upper surface of the point 762c. As a result, each of the first hardened points 762 has the same 稜鏡 pattern on its upper surface. The 稜鏡 pattern of each point may have a plurality of 稜鏡, and each 稜鏡 has an alignment in a selected direction And extended side surfaces. These side surfaces become the light reflecting surfaces of the corners of the light reflecting pattern (see Figures 1 and 3-5).

A mobile UV-ray irradiator 763d, which is moved together with the pattern printer 763, irradiates UV rays on a first hardening point having a gadolinium pattern, which is still fluid. After irradiating UV rays, the first hardening point having a prism pattern becomes hard. As a result, a solid-state prism spot 760 is formed on the surface 714 of the body 71. Each of the dots 760 has a light-reflecting surface in the shape of a dot, and the size and position of the dots 760 can be changed according to the size and position of the opening of the pattern mask 761 (see FIG. 13B). 15 FIG. 14A shows a manufacturing light according to another embodiment of the present invention.

Method and device for guiding plate. Fig. 14B is a front view in the direction "A" of the embodiment shown in Fig. 14A. Referring to FIGS. 14 and 146, the pattern forming unit 775 is disposed on the upper surface of the light guide plate body 710, and the body 710 is disposed on the base 717. The pattern forming unit 775 has a roller 20 cylinder 775a that is in contact with the surface of the body 710; a UV hardenable material dispenser 775b for discharging the UV hardenable material 770a on the surface of the drum 775a; and is used to disperse and flatten the UV hardenable material The squeegee 775c of 770a; UV-ray irradiation for generating a first UV-ray ☆ 775d, and UV-ray irradiator 775e for generating a second UV-ray. The roller 775a is made of an elastic material and has a large number of recessed holes 23 200420974 775f, and each recessed hole 775f has a 稜鏡 -shaped bottom. In other words, each of the prism pattern recesses 775f has a prism pattern of one or more ridges at its bottom. Each ridge of the ridge pattern formed on the ridge pattern recessed hole 775f has a side surface aligned in a selected direction and extended. The side surfaces 5 of these ridges are formed as light reflecting surfaces corresponding to the points of the light reflecting pattern (see FIGS. 1 and 3-5). When the roll 775a is rotated to advance on the body 71 °, the UV hardenable material dispenser 775b emits UV hardenable material 770a to fill the 稜鏡 pattern recess 775f on the 77% surface of the drum. The squeegee 775c immediately adjacent to the UV-hardenable material dispenser has an end portion in contact with the surface of the drum 775a, so that the squeegee 775c scrapes and accumulates the UV-hardenable material 770a on the surface of the drum 775a. As a result, the 稜鏡 pattern recessed hole 775f is filled with a UV-curable material 770b, which has the same surface level as the roller 775a. The UV-curable material 770a dispersed on the roller 775a but not filled into the recessed hole 775f is removed from the surface of the roller 775a by a squeegee 775c. The UV-curable material 770b in the hologram pattern recess 775f is irradiated with the first UV rays generated by the first UV-ray irradiator 775d. The first UV-hardened material 770c obtains hardness and loses fluidity through the first UV rays, and has a degree of adhesiveness. 20 While the drum 775a is rotating and advancing, the first UV hardening material 770c in the 稜鏡 pattern recess 775f is in contact with the surface 714 of the body 710. Since the first UV hardening material 770c is adhesive, the first UV hardening material 770c is separated from the recessed hole 775f and adhered to the surface 714 of the body 710. It should be noted that the first UV-hardening material 770c obtains the adhesion 24 200420974 by the irradiation of the first UV ray, and the adhesion force between the contact surface between the first UV-hardening material 770c and the body 710 is greater than the first UV-hardening material Adhesion of the contact surface between the 770c and the recessed hole 77 of the 稜鏡 pattern. Therefore, when the first UV-curable material 77 ~ is in contact with the surface 714 of the body 710, the first UV-curable material 77 (^ and the contact surface of the recessed hole 7 or f 5 are separated from each other, and the first UV-curable material 77 ° c The upper surface is adhered to the surface 714 of the body 710.

The UV-curable material 771 adhered to the surface 714 of the body 710 is then irradiated with the second UV rays generated by the second UV-ray irradiator 775e. After irradiating the second UV ray, the UV-hardening material 771 obtains a higher hardness of 10 in the body, and becomes a solid pip point 770. Therefore, the light guide plate main body 71 has a light reflection pattern on its surface, and the light reflection pattern has individual dots 770 including a light reflection surface. In this specific embodiment, the light reflection pattern can be effectively formed on the light guide plate body 71 in a single step.

15A and 15B are schematic diagrams of a method for manufacturing a light guide plate 15 according to the present invention. The die casting apparatus of the present invention includes an upper die 782 and a lower die 784. The upper mold 782 and the lower mold 784 are merged together to form a space therein. The space is composed of a first groove 785 and a second groove 786, which are respectively used to form the light guide plate body and the spot of the light guide plate. In other words, the 'first groove 785 has a shape and size consistent with the body of the light guide plate, and the second groove 786 has a recessed hole of a 稜鏡 pattern consistent with the light reflection pattern of the light guide plate. As shown in Fig. 15B, the first groove 785 and the second groove 786 in the molding device are filled with a hardenable material 787 such as a synthetic resin through the injection port 788 of the molding device. Once the resin is completely filled in the grooves 785 and 786, the upper mold 782 and the lower mold 784 are separated to produce a light guide plate having a light reflection pattern formed therein. Since the concave hole of the second groove 786 has a 稜鏡 pattern, the 稜鏡 points of the light guide plate formed by the lower mold 784 die casting have the same 稜鏡 pattern on the surface. 5 The advantage in this embodiment is that the mold casting method of the present invention allows mass production of light guide plates, and light guide plates with light reflection patterns of complex shapes can be easily manufactured.

Fig. 16 is a schematic diagram illustrating a backlight assembly according to a specific embodiment of the present invention. In FIG. 16, parts corresponding to those shown in FIG. 1 are denoted by the same 10-element reference numerals, and descriptions thereof are omitted to avoid repetition.

The backlight assembly 800 includes a light guide plate 700 including a main body 710 and a light reflection pattern 720; a light source 810; and a storage container 82. A light source such as a light emitting diode or a discharge lamp that supplies light to the light guide plate 700. In this embodiment, a cylindrical cold cathode lamp tube is used to provide light to the light guide plate 700. The storage container 8215 may be any shape suitable for storing the light guide plate 700 and the light source 810 therein. The storage container 820 has a side surface connected to the bottom to provide a storage space where the light guide plate 700 and the light source 810 can be fixedly installed. The backlight assembly 800 may further include a reflective plate 83 and a diffuser sheet 840 under the light guide plate to promote light utilization efficiency. The reflective plate 830 reflects the light leaked from the first surface 714 of the light guide plate 700 toward the light guide plate 700. The diffusion sheet 840 uniformly distributes the light from the second surface 716 of the light guide plate 700, so that the uniformly distributed light can be provided to a display panel (not shown). It should be noted, however, that the backlight assembly of the present invention can provide substantially the same uniform distribution of light even in the absence of a diffuser sheet 840. 26 200420974 cloth, due to the light reflection pattern 72 ° The light of the light guide plate is substantially perpendicular to the second surface 716. 17A and 17B are diagrams showing the brightness on the second surface m of the light guide bow I plate 700 in FIG. 16. The 5 degrees measured on the X-axis (refer to Figure 6) on the light guide plate are not the same as those shown in Figure 17A, and the degrees measured on the Y-axis (refer to the cap) on the light guide plate are shown on Figure 17B. The degree change is related to the angle of view and the angle ㊀3 of the light reflecting surfaces 722 and 724 of the point (see FIG. 5).

In FIGS. 17A and 17B, the vertical axis represents the brightness value, and the horizontal axis represents the value of the viewing angle, and the different graph lines individually represent different angles between the light reflecting surfaces 10 of the point. In this example, the angle between the light reflecting surfaces is about 80. To about 120. And the angle is about 82. To about 84. When the brightness becomes maximum. Because the angle between the light reflecting surfaces is less than about 80. Or greater than about 120. , The brightness becomes too low to be used for proper display.

Figures 17A and 17B show different viewing angles (that is, the viewing angle 15 in Figure 17B is narrower than that in Figure PA). However, if the light guide plate uses a light reflection pattern as shown in Figs. 8 to 11A, the viewing angle can become substantially the same. The brightness of the light guide plate in the present invention is compared with the conventional light guide plate as follows: 27 200420974 Exemplary embodiment Average brightness 1 Right three diffuser sheet The conventional light guide plate 3458 has a diffuser sheet and a Conventional light guide plate 4423 of prism sheet material A conventional light guide plate 2824 having a diffusion sheet, a stack of sheets, and a DBEF film has an angle of 82.5 between light reflecting surfaces. Light guide plate 8709 of the present invention Light guide plate 4950 of the present invention having a diffusion sheet Table 1 In Table 1, the "average brightness" is in the twenty-fifth position of the light guide plate. The average of the measured brightness values. As shown in Table 1, the angle between the light reflecting surfaces of the light guide plate of the present invention was 82.5. At this time, the brightness is higher than other types of light guide plates. This is because the light reflected by the light reflection pattern leaves the surface of the light guide plate at an emission angle substantially perpendicular to the surface of the light guide plate.

FIG. 18 is a schematic diagram illustrating a light guide plate applicable to the backlight assembly of FIG. 16. FIG. The light guide plate 750 in FIG. 18 has a light reflection pattern 780, which is different from the light reflection pattern 720 in FIG. The light reflection pattern 780 has dots, and the size and density of the dots vary depending on the area where the light guide plate 750 is located. As in this embodiment, the change in the size of the point is such that the point is smaller when the point is closer to the light source 810; and the point is larger when the point is farther from the 15 light source 810 . Similarly, the density change of the dots on the light guide plate 750 causes the dot density in the area of the light guide plate 750 to become higher when the area is far from the light source 810. In other words, the tongue says that the size of the spot is related to the prism spot and the light incident surface of the light guide plate 75.

28 200420974 And the distance between the density of the point in one of the areas of the light guide plate 75 is proportional to the distance between the area and the light incident surface. The configuration of the light reflection pattern 780 reduces the variation of the brightness provided by the light guide plate 75. Therefore, the light guide plate 75 () effectively provides light with a uniform distribution. Fig. 19 shows a light guide plate for a backlight assembly suitable for multiple light sources according to another embodiment of the present invention. As shown in FIG. D, the light guide plate has two light incident surfaces 902 and 904, and the light systems thereon are provided by two light sources 805 and 808, respectively. In this example +, the amount of light provided by the light source 8G5 and the second light source surface 10 varies according to the position of the area in the light guide plate _. in other words. When an area of the light guide plate 900 is closer to one of the first light source or the second light source, the light amount in the area is larger. Similarly, one area of the light guide plate has less light than the center of the near light guide plate. The difference in light intensity in different regions can cause a change in the brightness of the light provided from the light guide plate 900. 15 The light guide plate 900 in Fig. 19 avoids this or similar problems by compensating for variations in the amount of light. The light guide plate 900 has a light reflection pattern 92, and the light reflection pattern 920 has a dot that varies in size and density depending on the area in the light reflection pattern 92. In this embodiment, for example, when the point size is changed such that the point is closer to either the first light source or the second light source, the point 20 is smaller, and the point is away from the first light source 805 and the first light source. When the two light sources 808 are far away, the puppet point is larger. Similarly, the change in the dot density of the light reflection pattern 92 causes the light reflection pattern 920 to be closer to an area of one of the first or second light sources, and the density of the dots in the area is lower. Therefore, the mirror point in the center of the light sources 805 and 808 has the largest size and the highest density. The configuration of this light reflection pattern 92〇 29 200420974 avoids or reduces the brightness variation between the sides and the central area of the light guide plate 900. -Figure 20 illustrates a backlight assembly according to another embodiment of the present invention. In this embodiment, the two light sources 806 and 807 are provided to provide light to the side surfaces of all the light guide plates 930, and the light reflection pattern 940 is formed on the surface of the light guide plate 93. The light provided by 807 may be the best.

The first light source 806 and the second light source 807 each have at least one curved portion (here, an L-shaped curved portion) to cover all side surfaces of the light guide plate 93. There are four side surfaces at the light guide plate 930. The first light source 806 supplies light to make 10 incident on the two side surfaces of the light guide plate 930, and the second light source 807 supplies light to make it incident on The other side surface of the light guide plate 930. It is assumed that the light guide plate 930 does not have the same brightness as the light guide plate 930 if there is no light reflection pattern. The light guide plate 930 has a lower brightness in the center region than in the edge region.

The light reflection pattern 940 is configured to compensate for brightness variations in the light guide plate 930. As shown in FIG. 20, the pips of the light reflection pattern 940 have different sizes such that the pips are smaller when the pips are closer to one of the side surfaces. Similarly, when the spot is closer to the center of the light guide plate pattern, the spot is larger. The largest point may be formed in the center of the light guide plate 930. Therefore, the spot density 20 in the area near the center of the light guide plate 930 is higher than the area near the first or second light source. The light reflection pattern 940 prevents or reduces the brightness variation between the center and edge regions of the light guide plate 930. Fig. 21 is an exploded perspective view of a liquid crystal display (LCD) device according to a specific embodiment of the present invention. The LCD device 1000 is a backlight assembly 1800 using the embodiment shown in Figs. 16 to 20. The LCD device 1000 also includes 30 200420974 LCD panel assembly 1600, light guide plate 1700, storage container 1820, and diffusion sheet 1840. The storage container 1820 stores a lower base 1825, which houses the light source 1810 and the reflection plate 1830.

The LCD panel assembly 1600 is placed in the middle 5 above the backlight assembly 1800. The base 1500 includes an LCD panel 1650 and a driver module 1690. The electronic signal with image information is supplied to the LCD panel assembly 1600, and the image is displayed on the LCD panel 1650. For this image display, the LCD panel 1650 includes a TFT (thin film transistor) substrate 1610, a liquid crystal layer 1630, and a color filter substrate 1620, and the TFT substrate 1610 is connected to the driving module 1690. 10 The drive module 1690 includes a printed circuit board (PCB) 1680 and a tape and reel package 1670. The function of PCB1680 is to transmit the externally provided image signal so that it can be displayed on the LCD panel 1650 by the components of the LCD device. For example, the tape and reel package 1670 is provided to the TFT substrate 1610 with a timing signal from the PCB 1680 according to some timing combinations. 15 LCD panel 1650 is vertical with respect to the backlight assembly 1800

It is placed on the middle base 1500 in a movable but immovable manner in the horizontal direction. The LCD panel 1650 also includes a fragile substrate (ie, a glass substrate) that can be damaged by an external force. Therefore, the base 1300 in the LCD device is used to protect the LCD panel 1650 from external force, and fix the LCD panel 1650 to the 20 backlight assembly 1800. The base 1300 includes a pressure surface 1310 for fixing the LCD panel 1650 to the backlight assembly 1800 by pressing down the edge of the LCD panel 1650; and a fixing surface 1320 for fixing the pressure surface 1310 to the storage container 1820. For example, the fixing surface 1320 is assembled with the storage container 1820 by a hook connection. 31 200420974 Although the present invention has been described with reference to preferred embodiments, those skilled in the art will understand that the production of different variations and the replacement of component equivalents do not depart from the scope of the present invention. In addition, many modifications that can be made to fit a particular location or material are within the teachings of the invention without departing from the scope of the invention. Therefore, what I would like to do is that the present invention is not limited to the specific specific embodiments disclosed herein to implement the best mode of the present invention, but the present invention will include all the specific embodiments falling within the scope of the desired patent application. Brief description of the L diagram 3 10 FIG. 1 is a schematic representative diagram of a light guide plate according to a specific embodiment of the present invention, and FIGS. 2A and 2B are individual illustrations of a light guide plate according to a specific embodiment of the present invention Figure 3 is a schematic diagram of the light reflection pattern; Figure 3 is an enlarged view of part B in Figures 2A and 2B; 15 Figure 4 is a representative view of the point of Figure 3; Figure 5 is a view of Part C in Figure 4 Enlarged view; FIG. 6 is a schematic diagram illustrating a light reflection pattern according to a specific embodiment of the present invention; FIG. 7 is a schematic diagram illustrating a light traveling path in a light guide plate body; FIG. A schematic diagram of a light reflection pattern in another specific embodiment of the present invention; FIG. 9 is a schematic diagram illustrating a light reflection pattern in another specific embodiment of the present invention, 32 200420974 FIG. 10 is a diagram illustrating another specific embodiment of the present invention FIG. 11A is a schematic view illustrating a reflection pattern of another specific embodiment of the present invention; FIG. 11B is a cross-sectional view of a point in FIG. 11A; FIG. 11C is the present invention A cross-sectional view of a point in another specific embodiment, FIG. 12 is a A schematic diagram illustrating a light reflection pattern according to another embodiment of the present invention; FIG. 13A is a schematic diagram illustrating a light guide plate body and a pattern mask placed thereon; FIG. 13B is a schematic diagram of FIG. 13A Top view of the pattern mask; Figure 13C shows the step of depositing material on the pattern mask; Figure 13D shows the step of filling the opening of the pattern mask with material; 15 Figure 13E shows the first step of the material in the opening A hardening step; FIG. 13F shows the step of removing the pattern mask; FIG. 13G shows the step of forming a pattern on the first hardened material point; FIG. 14A shows the manufacturing light according to another specific embodiment of the present invention Guide plate method; 20 FIG. 14B is a front view of the pattern forming unit in FIG. 14A; FIGS. 15A and 15B are schematic cross-sectional views of a mold casting device for manufacturing a light guide plate according to the present invention, FIG. 16 The figure is a schematic diagram illustrating a backlight assembly according to a specific embodiment of the present invention; 33 200420974 Figures 17A and 17B show the brightness of the light guide plate calculated in Figure 16; Figure 18 is a schematic diagram illustrating the applicable Backlight in Figure 16 FIG. 19 is a schematic diagram illustrating a back 5 light assembly according to another embodiment of the present invention; FIG. 20 is a schematic diagram illustrating a backlight assembly according to another embodiment of the present invention And FIG. 21 is an exploded perspective view of a liquid crystal display (LCD) device according to a specific embodiment of the present invention. 0 [Representative symbols for main elements of the drawing] 620 First light reflection pattern 720a Light reflection pattern 625 Light reflection surface 721 Prism point 630 Second light reflection pattern 721a Prism point 632 Second reflection pattern 722 First light reflection surface 635 Light Reflective surface 724 Second light reflecting surface 637 Light reflecting surface 725 Light reflecting surface 700 Light guide plate 726 Light reflecting pattern 710 Body 728 Light reflecting pattern 712 Side surface 729 Light reflecting pattern 714 First surface 730 Light reflecting pattern 716 Second surface 735 light reflecting surface 717 substrate 740 light reflecting pattern 720 light reflecting pattern 745 light reflecting surface 34 200420974 746 light reflecting surface 775d UV ray irradiator 750 light guide plate 775e UV ray irradiator 760 light reflecting pattern 775f recessed hole 761 pattern mask 780 light reflection pattern 761a mask body 782 upper mold 761b opening 784 lower mold 762 material 785 first groove 762a UV hardening material 786 second groove 762b first hardening material 787 hardenable material 762c first hardening material point 788 Note Entrance 763 pattern printer 800 backlight assembly 763a roller 805 Light source 763b Rotating device 806 Light source 763c 稜鏡 pattern 807 Light source 763d UV irradiator 808 Light source 770 Solid point 810 Light source 770a UV hardenable material 820 Storage container 770b UV hardenable material 830 Reflective plate 770c First UV hardened material 840 Diffuse Shooting sheet 771 UV hardening material 900 Light guide plate 775 Pattern forming unit 902 Light incident surface 775a Roller 904 Light incident surface 775b UV hardenable material dispenser 920 Light reflection pattern 775c Scraper 930 Light guide plate

35 200420974 940 Light reflection pattern 1820 Storage container 1000 LCD device 1825 Lower base 1300 base 1830 Reflector 1310 pressure surface 1840 Diffuse sheet 1320 fixed surface a One side of the unit area 1500 Middle base b One side of the unit area 1600 LCD panel assembly A Direction 1610 TFT substrate AA, line 1620 color filter substrate B part 1630 liquid crystal layer C part 1650 LCD panel DD, line 1670 tape and reel package X axis 1680 printed circuit board Y axis 1690 drive module θ1 scattering angle 1700 light guide plate Θ2 Scattering angle 1800 backlight assembly 1810 light source Θ3 scattering angle

36

Claims (1)

200420974 Patent application scope: 1. A light guide plate comprising: a light incident surface for receiving light; 5 a first light emitting surface and a second light emitting surface to correspond to the first and second light emitting surfaces The first light emission angle of the surface emits light; and A light reflection pattern formed on the first light emitting surface for reflecting light toward the second light emitting surface, wherein the light reflected by the light reflecting pattern is on a second corresponding to the second light emitting surface The light emission angle of 10 leaves the second light emission surface. 2. For the light guide plate of the first patent application range, wherein the second light emission angle is larger than the first light emission angle. 3. For example, the light guide plate of the second patent application range, wherein the light reflection pattern includes a plurality of dots, and the dots have a regular pattern on the surface. 15 4. The light guide plate according to item 3 of the patent application scope, wherein the light reflection pattern Different regions on the first light emitting surface have different dot densities, so that the light reflection pattern is closer to the region of the light incident surface, and the dot density is lower in the region. 5. For example, the light guide plate of the patent application scope item 4, wherein the point has a different size of 20 so that the point is larger when the point is far away from the light incident surface. 6. For example, the light guide plate of the scope of patent application, wherein the point has a substantially uniform size, and the number of points in a unit area near the light emitting surface is less than one in a distance from the light emitting surface. The number of 37 200420974 points per unit area. 7. The light guide plate of item 3 of the patent application, wherein each of the points has a light reflecting surface extending in a selected direction, and adjacent light reflecting surfaces meet at the extended edge of the adjacent light reflecting surface. To form a corner between 5 adjacent light reflecting surfaces. 8. The light guide plate according to item 7 of the patent application, wherein the 稜鏡 pattern formed at each point includes 稜鏡 with individual adjacent light reflecting surfaces. 9. The light guide plate according to item 7 of the patent application, wherein the angle between the adjacent light reflecting surfaces is in the range of about 80 ° to about 120 °. 10 10. The light guide plate according to item 7 of the patent application, wherein the angle between the adjacent light reflecting surfaces is in the range of about 82 ° to about 84 °. 11. The light guide plate according to item 7 of the application, wherein the light reflecting surface is aligned in a direction parallel to the light incident surface. 12. The light guide plate according to item 7 of the patent application, wherein the point of the light reflection pattern 15 includes a first point and has a light reflection surface aligned with the first direction; And the second point has a light reflecting surface aligned in the second direction. 13. The light guide plate according to item 12 of the application, wherein the first direction is parallel to the light incident surface, and the first direction is perpendicular to the second direction. 20 14. The light guide plate according to item 12 of the application, wherein the first direction is parallel to the light incident surface, and the second direction is any direction independent of the first direction. 15. The light guide plate according to item 12 of the scope of patent application, wherein the first point is arranged in a matrix form, and the second point is individually inserted at the adjacent first point 38 200420974 16. The light guide plate according to item 7, wherein each of the light reflecting surfaces has at least one curved portion. 17. The light guide plate according to item 7 of the application, wherein the light reflecting surface 5 is formed in a concave shape on the surface of the point. 18. The light guide plate according to item 7 of the application, wherein the light reflecting surface is formed on the surface of the point in a convex shape. 19. The light guide plate as claimed in claim 3, wherein the points of the light reflection pattern are integrally formed on the first light emitting surface. 10 20. The light guide plate according to item 3 of the application, wherein the dots of the light reflection pattern are formed on a sheet attached to the first light emitting surface. 21. The light guide plate according to item 1 of the patent application range, wherein the light reflection pattern is made of a material whose refractive index is the same as the refractive index of the body material of the light guide plate. 15 22. A backlight assembly for providing light with uniform brightness, including: a light guide plate including: a light incident surface for receiving light; a first light emitting surface and a second light emitting surface for Light emitting at a first light emitting angle corresponding to the first and second light emitting surfaces; and a 20 light reflection pattern formed on the first light emitting surface for reflecting light toward the second light emitting surface, Wherein, the light reflected by the light reflection pattern leaves the second light emitting surface at a second light emitting angle corresponding to the second light emitting surface; a light source for supplying light to a light incident surface of the light guide plate; And 39 200420974 storage container for storing the light guide plate and the light source. 23. The backlight assembly of claim 22, wherein the second light emission angle is larger than the first light emission angle, and the light reflection pattern includes a plurality of dots, and the dots have a regular pattern on the surface. 5 24. The backlight assembly according to item 23 of the patent application, wherein the light reflection pattern Different regions on the first light emitting surface have different dot densities, so that the light reflection pattern is closer to the region of the light incident surface, and the dot density is lower in the region. 25. For example, the backlight assembly of the scope of application for patent No. 24, wherein the point has a different size of 10 so that the point is larger when the point is far away from the light incident surface. 26. If the backlight assembly of the scope of application for the patent No. 24, wherein the point has a substantially uniform size, and the number of points in a unit area close to the light-emitting surface is less than a unit away from the light-emitting surface The number of 15 points in the area. 27. For example, the backlight assembly of the scope of application for patent No. 23, wherein each of the points has a light reflecting surface extending in a selected direction, and adjacent light reflecting surfaces meet at the extending edge of the adjacent light reflecting surface. A corner formed between the adjacent light reflecting surfaces is formed, and the cymbal patterns 20 formed at each point include ridges each having the adjacent light reflecting surface. 28. The backlight assembly of claim 27, wherein the angle between the adjacent light reflecting surfaces is in the range of about 80 ° to about 120 °. 29. For example, the backlight assembly of claim 27, wherein the points of the light reflection pattern include the first point and have a light reflecting surface aligned with the first direction; 40 200420974 and the second point with the second direction aligned A light reflecting surface; the first direction is parallel to the light incident surface and the first direction is perpendicular to the second direction. 30. The backlight assembly according to claim 27, wherein the points of the light reflection pattern 5 include a first point having a light reflecting surface aligned in the first direction; and a second point having a light reflecting surface aligned in the second direction. A light reflecting surface; the first direction is parallel to the light incident surface and the second direction is any direction independent of the first direction. 31. The backlight assembly of claim 27, wherein the points of the light reflecting pattern 10 include a first point having a light reflecting surface aligned in the first direction; and a second point having a light reflecting surface aligned in the second direction. Light reflecting surface; the first points are arranged in a matrix form, and the second points are individually inserted between adjacent first points. 32. For the backlight assembly of claim 22, wherein the light source is bent 15 to cover at least two side surfaces of the light guide plate, the points of the light reflection pattern have different sizes, so that the light is emitted at the first light. The point of the central area on the surface is larger than the point of the edge area on the first light emitting surface. 33. The backlight assembly of claim 22, wherein the light source is curved to cover at least two side surfaces of the light guide plate, and points 20 of the light reflection pattern each include a light reflection surface, and the light reflection surface is individually There is at least one curved portion, so that the curved light reflecting surface reflects light from a light source. 34. If the backlight assembly of item 22 of the patent application scope further includes a second light source for supplying light to the second light incident surface of the light guide plate, wherein the points of the light reflection pattern have different sizes, such that The point is smaller when it is closer to one of the incident surfaces of the entrance 2004200420974. 35. If the backlight assembly of claim 34 is applied, the two light sources are curved to cover all the side surfaces of the light guide plate, and the points of the light reflection pattern have different sizes, so that the light is emitted at the first light. The point of the central region 5 on the surface is larger than the point of the edge region on the first light emitting surface. 36. For example, the backlight assembly of claim 35, wherein the points of the light reflection pattern each include a light reflection surface, and each of the light reflection surfaces has at least one curved portion, so that the curved light reflection surface reflects the light from the two light sources Light. 10 37. The backlight assembly according to item 35 of the application, wherein the points of the light reflection pattern each include a light reflection surface, and each of the light reflection surfaces has a concentric circle shape. 38. The backlight assembly of claim 22, further comprising a reflecting plate for reflecting light leaked from the first light emitting surface of the light guide plate. 39. The backlight assembly of claim 22, further comprising a diffusing sheet for diffusing the light leaving the second light emitting plate so that the light is uniformly distributed. 40. A liquid crystal display device for displaying images, comprising: 20 a backlight assembly including: a light guide plate including: a light incident surface for receiving light; a first light emitting surface and a second A light-emitting surface that emits light at a first light-emitting angle corresponding to the first and second light-emitting surfaces 42 200420974; and a light reflection pattern formed on the first light-emitting surface for reflecting the light so that Towards the second light emitting surface, wherein the light reflected by the light reflection pattern leaves the second light emitting surface at a second light emitting angle corresponding to the 5 face of the second light emitting table; a light source for supplying light To a light incident surface of the light guide plate; and a storage container for storing the light guide plate and the light source; a display panel for receiving light from the backlight assembly to display 10 images; and The base is used for fixing the display panel and the backlight assembly. 41. The liquid crystal display device according to claim 40, wherein the light reflection pattern includes a plurality of dots, the surface of the dot has a regular pattern, and the light reflection pattern has different regions on the first light emitting surface. 15 The same spot density makes the light reflection pattern closer to the area where the light is incident, and the spot density in this area is lower. 42. The liquid crystal display device according to claim 40, wherein the second light emission angle is greater than the first light emission angle; the light reflection pattern includes a plurality of dots, and the dots have a regular pattern on the surface; the dots are individually Having a light reflecting surface extending in a selected direction, and adjacent light reflecting surfaces meet at the extended edge of the adjacent light reflecting surface to form a corner between the adjacent light reflecting surfaces; and The angle system between the adjacent light reflecting surfaces is in a range of about 80 ° to about 120 °. 43. The liquid crystal display device according to item 42 of the application, wherein the points of the light reflection 43 200420974 pattern include a first point having a light reflecting surface aligned with the first direction; and a second point having a light reflecting surface aligned with the second direction A light reflecting surface; the first direction is parallel to the light incident surface and the first direction is perpendicular to the second direction. 5 44. The liquid crystal display device according to item 42 of the application, wherein the points of the light reflection pattern include a first point having a light reflecting surface aligned in the first direction; and a second point having a light reflecting surface aligned in the second direction. A light reflecting surface; the first direction is parallel to the light incident surface and the second direction is any direction independent of the first direction. 10 45. The liquid crystal display device according to item 42 of the application, wherein the points of the light reflection pattern include a first point having a light reflecting surface aligned in the first direction; and a second point having a light reflecting surface aligned in the second direction. Light reflecting surface; the first points are arranged in a matrix form, and the second points are individually inserted between adjacent first points. 15 46 · —A method for manufacturing a light guide plate, comprising: preparing a body of the light guide plate, the body having a surface including a light incidence surface and a light emission surface; placing a pattern mask on the first light emission On the surface, the pattern mask has a plurality of openings; 20 fills the opening with a fluid material; first hardens the material; removes the pattern mask to form a plurality of points of the first hardened material; A pattern is formed on the surface of the point of the first hardened material; and 44 200420974 the point of the second hardened material is hardened to form a solid point having a pattern. 47. The method of claim 46, wherein the material at this point is a UV (ultraviolet light) hardenable material, and the first hardening step includes applying UV 5 rays to the UV hardenable material filled in the opening. . 48. The method of claim 47, wherein the second hardening step includes applying a UV ray to a point of the first hardening material to make the point solid. 49. The method according to item 47 of the patent application, wherein the UV ray is applied in the first hardening step so that the material in the opening is sufficiently hardened without being deformed without the pattern mask. 50. The method of claim 46, wherein the step of filling the opening with a material comprises scraping the material placed on the pattern mask so that the material is at the same level as the surface of the pattern mask. 15 51. The method according to item 46 of the patent application scope, further comprising forming the openings of the pattern mask in different sizes, so that the size of the openings is inversely proportional to the distance between the openings and the light incident surface of the body. 52. A method for manufacturing a light guide plate, comprising: preparing a body of the light guide plate, the body having a surface including a light incident surface 20 and a light emitting surface; and a first light emitting surface disposed on the body The roller on the top forms a concave hole with a pattern; fills the concave hole with a fluid material; the first hardens the fluid material; 45 200420974 away from the cylinder, so that _—hard delete the fraction from the concave hole The points of the individual-hardened material are formed on the first light-emitting surface; and a) the points of the second-hardened material are second hardened to form a solid point having the figure. 10 15 20 53. The method of claim 52, in which the material at this point is a core hardenable material, and the first hardening step includes applying a radon ray to the UV hardenable material filled in the recessed hole. on. 54. The method according to claim 52, wherein the second hardening step includes applying a UV ray to a point of the first hardening material to make the point solid. 55. The method according to claim 52, wherein the ray is applied to the first hardening step so that the adhesion force between the contact surface between the first hardening material and the body is greater than the first hardening material Adhesion of the contact surface with the recessed hole. 56. The method of claim 52, wherein the step of filling the recess with a material comprises scraping the material placed on the pattern mask so that the material is at the same level as the surface of the pattern mask. 57. The method of claim 52, wherein the step of forming a recessed hole includes forming a 稜鏡 -shaped extended surface at the bottom of the corresponding recessed hole so that each point has a 稜鏡 -shaped extended surface, The light from the light incident surface is reflected toward the second light emitting surface. 46