TW200527063A - Surface light source device - Google Patents

Abstract

The present invention relates to a surface light source device, wherein the surface of incident surface of light guide plate in the surface light source device is densely covered with cones with a plurality of ramps; and, with the cones, the light source of light emitting diode configured outside the incident surface of light guide plate could provide the reflection of light source in multiple directions during inputting, so as to generate the scattering effect for entering the light guide plate to overcome the problem of dark strip area on light guide plate.

Description

200527063 V. Description of the invention (1) [Technology of the invention The present invention includes a dark band for a light guide plate [Prior technology] Press, a liquid crystal display light source device; of course, the liquid crystal display display provides it. The area where the conventional surface light source is reflected] It is not a type of area weakening. It is a surface light source device for liquid crystal display, especially a device in or eliminated from the area light source device. The main components are a liquid crystal display panel and a surface display panel, which are used for the performance of daytime display. If a light source is needed, it is a reflection plate 1 that is a source light source device. 2. A light source can be modified. The light-emitting element with the light source set on one side is shown in Fig. 1 and the diffusion angle is at the required 15; among them, the light-emitting surface 1 of the light material is 1 2 for the reflection 1 2 1 as most of the patterns 1 2 route 'and the board 1 2 of 1 4 made of light quality 2 1. The surface 1 of the light emitting surface is about to be adjusted by 4 and the light source surface light source, at least one of which can be 2 2 The light guide is provided with a light source diameter of 15 and is set on the light plate 1. The light source is reflected by the light source. The light pattern of the light source surface reflected by the light source is the most. When the light source is exited, the light guide plate 1 is reflected by the light guide plate 1 2 1 and the rear surface is reflected. After the above light is provided to liquid one, the main direction of the light source is diffused in the direction of convergence, and the surface of the light guide plate is connected to the reflective surface 14. The reflective surface transmitted in the light guide plate 12 can only be changed out. The redispersible film 1 crystal display must include a light guide and light diffusing film light element 14 and 12 which are transparent to the light source. 2 2 And the light incident surface of the reflective surface 2 and the travel of the light-guiding variable light source of the light sources 1 2 2 is used by the light guide 3 and the light-concentrating element panel.

Page 5 200527063 V. Description of the invention (2) In addition, the critical ratio between the light source of the first contact and the inseparable ratio is the use of a cold cathode 1 5 1 such as 1 5 2 as the light source, and the light is converted into Surface light emitting diodes Light diodes 1 Two adjacent hairs 1 2 1 Passing around 1 2 1 are formed. For questions, please refer to the paragraph for another practice of practitioners, which is the starting part 2 2 into the light guide plate The 2 pole body 3 is the rear of the light-emitting element 1 because of the light guide plate 1 '2 and the light plate 12. At present, industrial lamps (as shown in Figure 2 and Figure 3), the light source diode 1 to the light guide plate 1 in the light source diode 1 to the light source 1 to the light guide plate 1 in the subsequent light source diode 1 5 will output 1 2 5 and the so-called light Subsequent investment research 5: the light-incident surface of the light source 1 light-continued surface 1. The boundary of the light source is to emit CATHODE. One is to emit light. The cold cathode is intended to be converted into 2 because it is in the process. At 2 hours, the dark band area 1 was developed using the performance to enter the light guide plate 1 2 1, so the 2 2 matches the movement and performance of the two, the light element 1 5 of the FLUORESCENT diode (LE lamp tube 1 5 1 due to The point light source output of the point light source of the cold cathode lamp tube is 1 12, the light element is closed, and there is a choice of ownership. Lamp) D) is the output action, so 5 1 is closely related to the qualitative one shown in Figure 5. When the guide plate 2 makes the light-emitting diodes, the 4th life "enlarges the difficulty of its light source, and as shown in Figure 4, it will rotate out at an angle. The light source will pass through the light-entry surface at the light-guide plate 12. 5, the dark zone 1 2 is very unfavorable. In order to solve this problem, it is easy to overcome the 125 linear shape of the dark zone. Compared with, for the sake of reason, one of the questions on the light surface 5 is the light source 2 of the other hand of the conventional light guide plate 2 which is shaped as a convex body 3 of a triangular shape. By this design, the light source is advanced. Diffusion angle of the light source to solve the problem of the dark ▼ area due to light emission. However, it is still insufficient. 200527063 V. Description of the invention (3), as shown in Figure 5, one of the main uses of the light guide plate 2 The technical means is to use the two oblique sides (faces) 2 2 1 of the convex portion 22 of the triangular body to refract the light source through its oblique sides (faces) 2 2 1 so as to expand the refraction angle. However, the efficiency refracted by the light source is completely determined by the size of the slope 2 2 1 area of the convex portion f 2 2 of the triangular body. When the thickness value W of the light guide plate 2 is constant (that is, the convex portion of the triangular body) The two sides of the hypotenuse of 22 (the wide side of 22 1 area), in addition to enlarging the angle of the convex portion 22 of the triangle, can further increase the length L of the hypotenuse 2 2 1 of the triangle, so that the area of the hypotenuse is increased. In addition, there is no way to increase the area of the hypotenuse (face) 2 2 1. Even so, it still needs to be considered After the angle of the convex portion 2 2 'of the triangle is enlarged, does the corresponding relationship between the inclined angle of the hypotenuse (face) 2 2 1 of the triangle and the light source limit the angle of the convex portion 2 2 of the triangular body? The scope of performance has not been improved by the industry until now. Therefore, there is a need for improvement. The inventor is a professional engaged in the development of surface light source device related industries. The combination method is not perfect. It is actively researched based on long-term work experience, and the invention is finally obtained after continuous experiments and improvements. [Summary of the invention] The main object of the present invention is to provide a surface light source device. The surface: The light incident surface of the light guide plate in the light source device is densely covered with a cone having a plurality of inclined surfaces. When the light source of the light-emitting diode arranged outside the light-incoming surface of the light guide plate is input, the angle of refraction of the original light source is enlarged, and

Page 7 200527063 V. Description of the invention (4) Weakening or eliminating [Embodiment] In order to achieve the most expensive effect, the problem of the dark zone in the light guide plate includes the light guide plate film 4 3 and the configuration. The reflecting surface 4 2 sample 4 2 times 4 2 1 cone body 5 body 4 2 The scattering is now set to the cone position. Please refer to the review committee to reflect the light source as shown in Figure 6 4 2, and several light guide plates on one side are receiving surfaces 4 2 3, and 4. Please refer to the surface 4 2 1 of the light source 1 1 for later use. Please refer to the body 4 and cooperate with a correctable light to make a plurality of light sources of the light source set 4 2 is 2 with a light source input, and the reflecting surface 4 is easier to explain. For example, the direction of the reflection source of the hair is light 2 The extremely light-transmitting light surface understands the 2 2 this month: The surface of the light source plate 4 1 and the direction of the diffusion angle (the material of the LED 4 2 1-a reflective surface 4 2 surface system Structure and capable device 4 provided, 'diffused light-diffusing condensing element 4 4 which mainly introduces a light source; its completion, at least one light guide which can reflect the light source 2 and emit many light. Figure 7 As shown in Figure 8, the light-incident surface of the light guide plate 4 2 is densely covered with a cone with a plurality of inclined surfaces 4 2 1 1 1 has an outward or inward inclined surface a; and when $ is output, as shown in FIG. 9 As shown, its light source will be refracted in various directions through the formed inclined surface a, and will enter the inside of the light guide plate 4 2, so that it will provide the most #Figure 10 of the light incident surface 4 2 of the light guide plate 4 2, or only Set in the light emitting range corresponding to the smoke out of a polar body 5, so that twilight & State:-> Light source 2 of 2

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200527063 V. Description of the invention (5) The light-incident surface 4 2 is larger than the light-emitting source when outputting a in all directions. The surface of the present invention is densely packed with objects 4 2 1 4 2 'Please refer to the three-side inward 4 2 1 At the interface a, the light guide plate 4 can, of course, be shaped, and its shape can also be a problem with the original light source 5 of the light source 5. 1 No diode is required, and its light is folded the most. There are a plurality of faces. 1 2 The face must be illuminated. 4 2 Figure 11 or outward light emission 2 2 dark band When the present invention is used to guide light inward, the transmission angle is increased by 5 Be able to shoot. Features: The bevel has a bevel of 1 and twelve—the polar body of the polar body 5 area 4 6 is conical or extended to the outer plate 4 2 and the cone is 4 2 1 χ length light range Let the inclined surface formed by the cone 4 4 1 1 of the light-emitting diode 5 be on the light incident surface 4 2 of the light guide plate 4 2 and form a cone 4 2 1 1 to form a single cone multi-surface inclined surface. a, that is, the light guide plate has a plurality of inclined surfaces a ', and as shown by the triangle, the cone 4 2 1 1 will have a, and when the light source of the light incident surface 5 of the light guide plate 4 2 is transmitted through many Increasing the angle of the original light beam from the oblique angle will help reduce or eliminate it. The body 4 2 1 1 can also be a quadrangular or multi-sided beveled surface a while it is a four-sided or multi-sided beveled surface 4 2 1 The light-emitting diode can be made larger by receiving a plurality of beveled surfaces a to overcome the light guide plate Dark zone 4 of 6

In addition, the tapered body 4 2 1 1 can be formed directly by a mold, or alternately cut with a V-shaped cutter B and given a driver, π x X ^ ^, J Λ 凡 成 (V — Cut), as shown in Fig. 10, in which the inclination a of the inclined plane a in the V-shaped tool b blade edge + + &ten; body 4 2 1 1 i ㈤ ^ ^

Bevel angle, use this V-shaped cutter B ρ to reach the cone shape of the preset inclined surface a. After parallel and staggered cutting, you can go crazy

Page 9 200527063 V. Description of the invention (6) Body 4 2 1 1 Please also refer to FIG. 14, which is another embodiment of the present invention. The shape of the cone 42 1 1 of the present invention is that on the light exit surface 42 1 of the light guide plate 42, if it is convex outward, its top surface may be It is set as a flat surface b. The area of the flat surface b? Is inversely proportional to the area of the inclined surface a of the cone 4 2 11. The brightness required for the light guide plate 4 2 can be matched to adjust the flat surface b. The size of the area allows the light source of the light-emitting diode 5 to be refracted in all directions via the tapered body 4 2 1 1 and the flat surface b for the light guide plate 4 2 to benefit.

In addition, the shape of the cone 4 2 1 1 of the present invention, if the light exit surface 4 2 1 of the light guide plate 4 2 is concave inward, its bottom surface may also be a flat surface b ′, the flat surface. The area of b 'is also inversely proportional to the area of the inclined surface a of the conical body 4211, and can be matched with the required brightness of the light guide plate 42 to adjust the size of the flat surface b' area to make the light source of the light emitting diode 5 The energy j can be folded in all directions through the tapered body 4211 inclined plane a and the flat surface b '! To facilitate the use of the light guide plate 42. i

And as shown in FIGS. 16 and 17, according to yet another embodiment of the present invention, if the 'conical body 42 11 is on the light emitting surface 42 1 of the light guide plate 42, if the three surfaces are convex, the top surface may be It is set as a flat surface c; and if the light-emitting surface 421 of the conical body 4211 on the light guide plate 42 is concave in three directions, its bottom surface can also be a flat surface c ', and the flat surfaces c, c' described above. The area can be matched with the required brightness of the light guide plate 4 2 to adjust the size of the flat surface c, c 'area, so that the light source of the light emitting diode 5 can pass through the tapered body 4211 inclined surface a and the flat surface c, c' Refraction in all directions, so that the light incident surface 4 2 1 of the light guide plate 4 2 is received by the light source of the light emitting diode 5

Page 10 200527063 5. In the description of the invention (7), the original light-emitting angle of the light-emitting diode 5 can be enlarged through a large number of inclined surfaces a, which can help to weaken or eliminate the light guide plate 4 2 dark band area 46. . In summary, the surface light source device of the present invention allows the light source of the light-emitting diode disposed outside the light guide surface of the light guide plate to be multi-directionally refracted when the light source is input, so that Into the light guide plate that produces a scattering effect, it is not only simple and effective to overcome the problem of the dark band area of the light guide plate, but it is obviously new and progressive. It has applied for an invention in accordance with the law. As for the detailed review, Huici is the only one who has the right to examine the grant of patents.

200527063 Schematic description [Schematic description] Figure 1 is a simple schematic diagram of a conventional surface light source device. Figures 2 and 3 are perspective views of a conventional surface light source device. FIG. 4 is a schematic diagram of a light guide plate of a conventional surface light source device. FIG. 5 is a schematic diagram of another conventional light guide plate. Figure 5 is a perspective view of Figure 5. Figure 6 is a simple schematic diagram of the surface light source device of the present invention. FIG. 7 is a perspective view of a cone of a light-incident surface of a light guide plate of the present invention protruding outward. FIG. 8 is a perspective view of a cone-shaped body recessed inward of the light-incident surface of the light guide plate of the present invention. FIG. 9 is a schematic diagram of refraction of a light guide plate according to the present invention. FIG. 10 is a schematic diagram of refraction of another light guide plate according to the present invention. Fig. 11 is a perspective view of an embodiment in which the cone-shaped body of the light-incident surface of the light guide plate of the present invention projects outward. Fig. 12 is a perspective view of an embodiment in which a cone-shaped body of a light-incident surface of a light guide plate of the present invention is recessed inward. FIG. 13 is a schematic view showing the formation of a cone of a light guide plate according to the present invention. Fig. 14 is a perspective view of an embodiment in which a cone-shaped body of a light-incident surface of a light guide plate of the present invention projects outward. Fig. 15 is a perspective view of an embodiment in which a cone-shaped body of a light-incident surface of a light guide plate of the present invention is recessed inward. FIG. 16 is a perspective view of an embodiment in which a cone-shaped body of a light-incident surface of a light guide plate of the present invention is convex outward. Fig. 17 is a perspective view of an embodiment in which a cone-shaped body of a light-incident surface of a light guide plate of the present invention is recessed inward.

Page 12 200527063 Brief description of the drawing 1 set of surface light source light surface [1 2 light guide plate 3 light emitting diode 4 surface light source device 1 2 light guide plate 1 2 2 reflective surface 1 2 4 light guide pattern 1 4 poly Light element 1 5 1 Cold cathode tube polar body 2 2 Raised part 1 1 Reflective plate 1 2 1 Light entrance surface 1 2 3 Light exit surface 1 3 Light diffusing film 1 5 Light emitting element 1 5 2 Light emitting 2 2 Incident surface 2 2 1 beveled edge (face) 4 1 exhaust plate 4 2 light guide plate 421 light entrance surface 422 reflection surface 4 2 1 1 cone 423 light exit surface 424 light guide pattern 4 3 light diffusing film 4 4 light collecting element 4 5 light emission Diode a bevel b flat surface c flat surface BV cutter b 'flat surface c flat surface

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Claims (1)

200527063 6. Scope of patent application1. A surface light source device, which includes: a light guide plate with a light-emitting surface and a reflective surface, and one or more light-incident surfaces; a plurality of light-emitting diode lamp sources to configure It is on the light incident surface of the light guide plate; it is characterized in that the light incident surface of the light guide plate is densely covered with a plurality of bevels: a cone-shaped body, which allows the light source of the light emitting diode to generate multi-directional refraction and enter the guide Inside the light plate to reduce or eliminate the formation of dark bands in the light guide plate. 2 · A surface light source · device as described in item 1 of the scope of patent application, wherein the cone-shaped body can be provided only at a corresponding position of the light-emitting diode. 3 · A surface light source device according to item 1 of the scope of patent application, 5 wherein the periphery of the cone-shaped body may be a quadrangle. 4 · A surface light source device as described in item 3 of the patent application, wherein the inclined surface of the cone-shaped body may be an outwardly protruding one. 5. A surface light source device according to item 3 of the scope of patent application: wherein the inclined surface of the cone-shaped body may be a concave inward. : 6 · A surface light source device according to item 1 of the scope of patent application, wherein the peripheral edge of the cone-shaped body can be a triangle. ; 7) A surface light source device as described in item 6 of the scope of patent application: wherein the inclined surface of the cone-shaped body may be a convex outward. 8. A surface light source device according to item 6 of the scope of patent application, wherein the inclined surface of the cone-shaped body may be a concave inward. '9 · A surface light source device according to item 1 of the scope of the patent application, wherein the periphery of the cone-shaped body may be a polygon.丨 1 0 · A surface light source device as described in item 9 of the scope of patent application Page 14 200527063 6. Scope of patent application, where the inclined surface of the cone-shaped body may be convex outward. 1 1 · A surface light source device according to item 9 of the scope of patent application, wherein the inclined surface of the cone-shaped body may be a concave inward. 1 2 · A surface light source device as described in item 1 of the scope of patent application, wherein the cone-shaped body can be convex outward and the top surface is a flat surface. 1 3 · A surface light source device as described in item 1 of the scope of patent application, wherein the cone-shaped body may be inwardly recessed and the bottom surface is a flat surface. Page 15