JP3220370U - Light guide plate and light source module - Google Patents

Abstract

A light guide plate having functions of condensing and guiding light and a light source module including the light guide plate and reducing production costs are provided.
A light guide plate has at least one light incident surface, a light exit surface, a bottom surface, and at least one first hollow structure. The light exit surface is opposed to the bottom surface, and the light incident surface 110 is connected between the light exit surface and the bottom surface. The first hollow structure 140 is installed corresponding to the light incident surface 110, penetrates from the light exit surface to the bottom surface, and is close to the corresponding light incident surface 110, and the first hollow structure 140 extends along the light incident surface 110. A plurality of condensing refracting surfaces 141 installed. The light source module 10 includes the light guide plate 100.
[Selection] Figure 1A

Description

  The present invention relates to a light guide plate and a light source module, and more particularly to a light guide plate having a hollow structure and a light source module including the light guide plate.

  Transparent displays are widely used in many aspects such as advertising signs, display windows, and head-up displays. A light source of a conventional transparent display generally employs a light emitting diode (LED), and the luminous flux of the light emitting diode has a high light collecting property, so that it can be applied to a local display function of the transparent display.

  A conventional transparent display includes a light guide plate and a light emitting assembly having a plurality of light emitting diodes, and a condensing lens between the light guide plate and the light emitting diodes in order to improve the degree of light collecting of the light emitting diodes. May be added. However, in order to install the condenser lens between the light guide plate and the light emitting diode, of course, it is necessary to add a support structure for the condenser lens so that the condenser lens is fixed between the light guide plate and the light emitting diode. is there. Thus, there is a risk of increasing the overall production cost.

  In addition, since this "background art" part is only for helping the understanding of the contents of the present invention, the contents disclosed in this "background art" part are not known to those skilled in the art. May include technology. Thus, the content disclosed in this “Background” section is well known to those skilled in the art prior to the filing of the present invention, or the problem to be solved by one or more embodiments of the present invention. Does not mean being.

  An object of the present invention is to provide a light guide plate having functions of condensing light and guiding light.

  Another object of the present invention is to provide a light source module that can reduce production costs.

  Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

  In order to achieve some or all of the above-described objects or other objects, the light guide plate according to the present invention includes at least one light incident surface, a light exit (ie, light extraction) surface, a bottom surface, and at least one first hollow. It has a structure. The light exit surface is opposed to the bottom surface, and the light entrance surface is connected between the light exit surface and the bottom surface. The first hollow structure is installed corresponding to the light incident surface, penetrates from the light exit surface to the bottom surface, and is close to the corresponding light incident surface, and the first hollow structure is a plurality of installed along the light incident surface. Including a condensing and refracting surface.

  In order to achieve some or all of the above-described objects or other objects, a light source module according to the present invention includes the above-described light guide plate and at least one light-emitting assembly. The light emitting assembly is disposed in the vicinity of the light incident surface of the light guide plate and corresponds to the first hollow structure, and the light emitting assembly includes a plurality of light emitting elements, each of the light emitting elements corresponding to the first hollow structure. It is opposed to a plurality of condensing refracting surfaces.

  In the present invention, the light guide plate has the first hollow structure, and the condensing and refracting surface of the first hollow structure has a function of collecting the luminous flux of the light emitting element, and thus has a function of condensing and guiding light. Since the light source module according to the present invention uses this light guide plate, there is no need to add a condensing lens between the light guide plate and the light emitting assembly, and no support structure for the condensing lens is added. With simple mechanical design and relatively simple assembly procedure, production cost can be reduced.

  In order to make the above features and advantages of the present invention more apparent, the embodiments will be described in detail with reference to the accompanying drawings.

It is a figure which shows the light source module in one Example of this invention. FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A. It is an enlarged view of the condensing refractive surface in the other Example of this invention. It is a figure which shows the light source module in the other Example of this invention. It is a figure which shows the light source module in the other Example of this invention. FIG. 3B is a locally enlarged view of the light source module of FIG. 3A. It is a figure which shows the light-guide plate in the other Example of this invention. It is a figure which shows the light source module in the other Example of this invention. It is a figure which shows the light source module in the other Example of this invention. It is a figure which shows the light-guide plate in the other Example of this invention.

  The above-described and other technical contents, features, functions, and effects of the present invention will become apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings. It should be noted that the terms for the directions mentioned in the following embodiments, for example, up, down, left, right, front, back, etc. are only directions of the attached drawings. Accordingly, the directional terminology used is for the purpose of describing the present invention only and is not intended to limit the present invention.

  FIG. 1A is a diagram illustrating a light source module according to an embodiment of the present invention. FIG. 1B is a cross-sectional view taken along the line AA in FIG. 1A of the light guide plate in one embodiment of the present invention. As shown in FIGS. 1A and 1B, the light source module 10 of the present embodiment includes a light guide plate 100 and a light emitting assembly 200. The light guide plate 100 includes at least one light incident surface 110, a light exit surface 120, a bottom surface 130, and at least one first hollow structure 140. In FIG. 1A, one light incident surface 110 and one first hollow structure 140 are taken as an example. The light exit surface 120 is opposed to the bottom surface 130, and the light entrance surface 110 is connected between the light exit surface 120 and the bottom surface 130. The first hollow structure 140 is installed corresponding to the light incident surface 110, penetrates from the light exit surface 120 to the bottom surface 130, and is close to the corresponding light incident surface 110. The first hollow structure 140 has a plurality of condensing and refracting surfaces 141 installed along the light incident surface 110, and in the present embodiment, the first hollow structure 140 includes, for example, a single hollow portion 143. The plurality of condensing and refracting surfaces 141 are located on one side of the hollow portion 143 close to the corresponding light incident surface 110. The plurality of condensing and refracting surfaces 141 are located between the hollow portion 143 and the light incident surface 110, and the plurality of condensing and refracting surfaces 141 are connected to each other, for example. The light emitting assembly 200 is disposed in the vicinity of the light incident surface 110 of the light guide plate 100 and corresponds to the first hollow structure 140. The light emitting assembly 200 includes a plurality of light emitting elements 210 and a substrate 220 on which the light emitting elements 210 are mounted. The light emitting elements 210 each have a plurality of condensing refractive surfaces 141 of the corresponding first hollow structure 140. Relative to The condensing refracting surface 141 may be a curved surface having a positive refracting power (diopter), and the refracting power of the plurality of condensing refracting surfaces 141 may be the same or different. In this embodiment, the curvatures of the curved surfaces of the plurality of condensing refracting surfaces 141 shown in FIG. 1A are the same, and thus the refractive powers of the plurality of condensing refracting surfaces 141 are the same. However, in other embodiments, the plurality of condensing refracting surfaces 141 may have at least two different curved curvatures, whereby the refractive power of at least one partial condensing refracting surface 141 is: Different from each other. The shortest distances from the plurality of condensing refracting surfaces 141 to the light incident surface 110 may be the same or different. In the present embodiment, the shortest distances d1 from the plurality of condensing refracting surfaces 141 to the light incident surface 110 shown in FIG. 1A are the same, but in other embodiments, the plurality of condensing refracting surfaces 141 and the light incident surfaces are the same. There may be at least two different shortest distances from the surface 110, whereby the shortest distances from at least some of the condensing refractive surfaces 141 to the light incident surface 110 are different from each other. Further, in the present embodiment, the condensing and refracting surfaces 141 are connected to each other, for example, but in other embodiments, the condensing and refracting surfaces 141 may not be connected to each other. As shown, they may be connected by a plane 146.

  In the present embodiment, each of the plurality of light emitting elements 210 of the light emitting assembly 200 may be a light emitting diode or other solid light source, but is not limited thereto.

  As shown in FIG. 1A, each light emitting element 210 of the light emitting assembly 200 generally corresponds to one dimming region 119 of the light guide plate 100. The light emitting element 210 provides light beams having different light output (that is, light extraction) angles, for example, a light beam L and a light beam L1, and among them, the light beam L having a relatively small light output angle can be obtained without the condensing refracting surface 141. The light can be emitted from the corresponding dimming region 119. On the other hand, the light beam L1 having a relatively large light emission angle can receive the light condensing action of the light converging refracting surface 141 and can be emitted from the corresponding light control region 119. Therefore, the light converging and refracting surface 141 increases the ratio at which the light flux from the light emitting element 210 exits from the corresponding dimming area 119, avoids interference with the adjacent dimming area 119, and zoning adjustment of the light source module 10. The light effect can be improved.

  In this embodiment, the light guide plate 100 has the first hollow structure 140, and the condensing and refracting surface 141 of the first hollow structure 140 has a function of collecting the light flux from the light emitting element 210. It has a function. Since the light source module 10 of this embodiment uses this light guide plate 100, it is not necessary to add a condenser lens between the light guide plate 100 and the light emitting assembly 200, and it is also necessary to add a support structure for the condenser lens. Therefore, it has a relatively simple mechanism design and a relatively simple assembly procedure, and can reduce production costs.

  FIG. 2 is a view showing a light source module according to another embodiment of the present invention. As shown in FIG. 2, the light source module 10a of the present embodiment is similar to the advantages and structure of the light source module 10 described above, but the main difference is in the first hollow structure of the light guide plate. Specifically, each first hollow structure 140a of the light guide plate 100a of the present embodiment includes a plurality of hollow portions 143a. These hollow portions 143a are installed along the corresponding light incident surfaces 110 and are separated from each other, and the respective condensing refracting surfaces 141a are separated from each other by the first refracting portion 141b and the second refracting portion 141c. including. As shown in FIG. 2, the first refracting part 141b and the second refracting part 141c are side walls of two adjacent hollow parts 143a. Among them, the first refracting portion 141b and the second refracting portion 141c face each other. The plurality of light emitting elements 210 of the light emitting assembly 200 are opposed to the condensing refracting surface 141a having the first refracting portion 141b and the second refracting portion 141c, respectively. In the present embodiment, these hollow portions 143a may have different sizes or shapes, and thus may have different refractive power between the condensing refracting surfaces 141a, or a single unit. The condensing refracting surface 141a may have a first refracting portion 141b and a second refracting portion 141c having different refractive powers. In other embodiments, these hollow portions 143a may have the same shape and size, and thus the refractive powers of the plurality of condensing refracting surfaces 141a are the same. In the present embodiment, the shortest distances from the condensing refracting surface 141a to the light incident surface 110 may be different. For example, the shortest distance d2 is different from the shortest distance d3. In other embodiments, the shortest distances from the condensing refracting surface 141a to the light incident surface 110 may be the same.

  In this embodiment, the light beam L having a relatively small light exit angle passes through the condensing refracting surface 141a via the first refracting portion 141b and the second refracting portion 141c of the condensing refracting surface 141a, and The light can be emitted from the corresponding dimming region 119. The light beam L1 having a relatively large exit angle can be emitted from the corresponding light control region 119 by the condensing action of the first refracting portion 141b and the second refracting portion 141c of the condensing refracting surface 141a. In this embodiment, the first refracting portion 141b and the second refracting portion 141c separated from each other do not require the light beam L to be refracted on the condensing refracting surface 141a, and the corresponding light control region 119 can be emitted. Further, it is possible to reduce wear that occurs when the light flux L propagates between different media.

  FIG. 3A is a view showing a light source module according to another embodiment of the present invention. FIG. 3B is a locally enlarged view of the light source module of FIG. 3A. As shown in FIGS. 3A and 3B, the light source module 10b of the present embodiment is similar to the light source module 10 described above, but the main difference is that the light guide plate 100b of the present embodiment further includes at least one light incident light. The object is to have at least one second hollow structure 150 located between the face 110a and the at least one first hollow structure 140a. In FIG. 3A, a case where one second hollow structure 150 is located between one light incident surface 110a and one first hollow structure 140a is taken as an example. The second hollow structure 150 penetrates from the light exit surface 120 to the bottom surface 130. The second hollow structure 150 includes a plurality of reflecting surfaces 151, and these reflecting surfaces 151 are located between the light incident surface 110a and the plurality of condensing refractive surfaces 141a of the first hollow structure 140a, and Each corresponds to a plurality of condensing refracting surfaces 141a. In the present embodiment, each second hollow structure 150 includes a plurality of hollow patterns 152 separated from each other, and these hollow patterns 152 partition the light incident surface 110a into a plurality of light incident portions 111 separated from each other. Each reflective surface 151 includes a first reflective portion 151a and a second reflective portion 151b that are separated from each other, and the first reflective portion 151a and the second reflective portion 151b are respectively sidewalls of two adjacent hollow patterns 152. The first reflecting portion 151a and the second reflecting portion 151b of the single reflecting surface 151 are connected to both ends of the same light incident portion 111, that is, the light incident portion 111 is connected to the first reflecting portion 151a. And the second reflecting portion 151b.

  The plurality of light emitting elements 210 of the light emitting assembly 200 are respectively opposed to the plurality of light incident portions 111, and the light emitting elements 210 provide light beams having different light output angles, for example, a light beam L, a light beam L1, and a light beam L2. Among them, the light output angles of the light beam L and the light beam L1 and the propagation path after entering the light guide plate 100b may be the same as those in FIG. 2, and thus detailed description thereof is omitted here. The outgoing angle of the light beam L2 is larger than that of the light beam L1, and the first reflecting portion 151a and the second reflecting portion 151b of the reflecting surface 151 can each reflect the light beam L2 to the corresponding condensing refracting surface 141a. Thus, the light beam L2 can be emitted from the corresponding light control region 119. The reflective surface 151 of the light guide plate 100b of the present embodiment further increases the ratio at which the luminous flux from the light emitting element 210 can be emitted from the corresponding dimming region 119, and further improves the zoning dimming effect of the light source module 10b. Can do.

  In the present embodiment, the combination of the first hollow structure 140a and the second hollow structure 150 of the light guide plate 100a illustrated in FIG. 2 is described as an example, but the second hollow structure 150 of the present embodiment is illustrated in FIG. It can also be applied to the light guide plate 100 of the light source module 10 of 1A.

  FIG. 4 is a view showing a light guide plate in another embodiment of the present invention. As shown in FIG. 4, the present embodiment is almost the same as the embodiment of FIG. 3, but the main difference is that the light incident surface 110 of the light guide plate 100c of the present embodiment is different from that of the second hollow structure 150a. The hollow pattern 152a is not partitioned into a plurality of light incident portions separated from each other, and the plurality of hollow patterns 152a of the second hollow structure 150a are located between the light incident surface 110 and the first hollow structure 140a as a whole. In addition, the light incident part 111a formed corresponding to the light emitting unit 210 between the adjacent hollow patterns 152a is also located inside the light guide plate 100c. In this embodiment, the combination of the first hollow structure 140a and the second hollow structure 150a shown in FIG. 2 is described as an example, but the second hollow structure 150a of the present embodiment is a light source module of FIG. 1A. It can also be applied to ten light guide plates 100.

  FIG. 5A is a view showing a light source module according to another embodiment of the present invention. As shown in FIG. 5A, the light source module 10c includes a light guide plate 100d. However, compared to the embodiment of FIG. 1A, the light guide plate 100d includes at least one reflective layer 160 disposed on at least one light incident surface 110. Further, it may be included. FIG. 5A exemplifies a case where one reflective layer 160 is disposed on one light incident surface 110. The reflective layer 160 has a plurality of openings 161 exposed from the light incident surface 110, and these openings 161 respectively correspond to the plurality of condensing and refracting surfaces 141. The plurality of light emitting elements 210 of the light emitting assembly 200 may be respectively installed with respect to the opening 161, and the size of the opening 161 may be smaller than the light emitting element 210. , For example, a light beam having a relatively large outgoing angle can be blocked.

  Like the optical path shown in FIG. 5A, the light emitting element 210 provides the light beam L, the light beam L1, and the light beam L2 with different light output angles, of which the light output angle of the light beam L and the light beam L1 and after entering the light guide plate 100d Since the propagation path may be the same as in FIG. 1, detailed description thereof is omitted here. Since the light beam L2 has a light output angle that is too large, when it enters the light guide plate 100d, it tends to enter the adjacent light control region 119. Therefore, by installing the reflective layer 160, the light beam L2 is prevented from entering the light guide plate 100d, and the light beam L2 is prevented from interfering with the region close to the light control region 119 after entering the light guide plate 100d. Can do.

  FIG. 5B is a diagram illustrating a light source module according to another embodiment of the present invention. As shown in FIG. 5B, the difference between the present embodiment and the embodiment of FIG. 5A is that the light incident surface 110 of the light guide plate 100e has a plurality of protrusions 112 respectively installed in the openings 161, and the light emitting assembly 200 The plurality of light emitting elements 210 are respectively installed relative to the protrusions 112, and thereby the alignment of the plurality of light emitting elements 210 of the light emitting assembly 200 can be assisted. 5A and 5B show a condensing and refracting surface 141 similar to that in FIG. 1, but the above-described reflective layer 160 and protrusion 112 can also be applied to all the above-described embodiments.

  FIG. 6 is a view showing a light guide plate in another embodiment of the present invention. As shown in FIG. 6, in the above-described embodiments, the case where one first hollow structure corresponds to one light incident surface is described as an example, but the present invention is not limited to this. The first hollow structure 140c of the light guide plate 100f of the present embodiment is configured such that a plurality of, for example, two first hollow structures 140c in FIG. 6 are installed corresponding to the light incident surface 110 and the light incident surface 110b, respectively. good. The first hollow structure 140c shown in the present embodiment is similar to the first hollow structure 140 of FIG. 1, but is not limited thereto, and the first hollow structure 140c is the first hollow structure 140c of any of the above-described embodiments. It may be a structure.

  From the above, the present invention has the function of condensing and guiding light since the light guide plate has the first hollow structure and the condensing refracting surface of the first hollow structure has the function of collecting the light flux of the light emitting element. Have. Since the light source module of the present invention uses this light guide plate, there is no need to add a condensing lens between the light guide plate and the light emitting assembly, and there is no need to add a support structure for the condensing lens. With a simple mechanical design and a relatively simple assembly procedure, production costs can be reduced.

  The present invention has been disclosed above based on the above-described preferred embodiments. However, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art will understand the idea of the present invention. As long as the scope of the present invention is not deviated, minor changes and color changes can be made to the present invention. Therefore, the protection scope of the present invention is based on what is defined in the attached utility model registration request. Moreover, any embodiment of the present invention or claim for utility model registration need not achieve all the objects, advantages, or features disclosed in the present invention. In addition, a part of the summary and the name of the device are only for helping to search for documents, and do not limit the scope of rights of the present invention. In addition, terms such as “first” and “second” referred to in this specification or claims for utility model registration name elements or distinguish different embodiments or ranges. This is only for the purpose, not for limiting the upper or lower limit on the quantity of elements.

10, 10a, 10b, 10c: Light source module
100, 100a, 100b, 100c, 100d, 100e, 100f: Light guide plate
110, 110a, 110b: Light incident surface
111, 111a: Light receiving part
112: Projection
120: Light emitting surface
130: Bottom
140, 104a, 140b, 140c: First hollow structure
141, 141a: Condensing refracting surface
141b: First refraction part
141c: Second refraction part
143, 143a: Hollow part
146: Plane
150, 150a: Second hollow structure
151: Reflective surface
151a: First reflector
151b: Second reflector
152, 152a: Hollow pattern
160: Reflective layer
161: Opening
200: Light emitting assembly
210: Light emitting element
220: Board
L: Luminous flux
L1: Luminous flux
L2: Luminous flux
d1, d2, d3: shortest distance

Claims (14)

A light guide plate,
Having at least one light incident surface, a light output surface, a bottom surface, and at least one first hollow structure, the light output surface is opposite to the bottom surface, and the at least one light incident surface is the light output surface and the bottom surface. The at least one first hollow structure is installed corresponding to the at least one light incident surface, and each first hollow structure penetrates from the light exit surface to the bottom surface, and A light guide plate that includes a plurality of condensing and refracting surfaces that are adjacent to the corresponding light incident surface and each of the first hollow structures is disposed along the light incident surface. The light guide plate according to claim 1,
Each of the first hollow structures further includes a single hollow portion, and the plurality of condensing and refracting surfaces are located on one side of the hollow portion adjacent to the corresponding light incident surface, and the hollow portion And a light guide plate positioned between the light incident surface and the light incident surface. The light guide plate according to claim 2,
The plurality of condensing and refracting surfaces are connected to each other. The light guide plate according to claim 1,
Each of the first hollow structures includes a plurality of hollow portions, and the plurality of hollow portions are disposed along the corresponding light incident surface and separated from each other, and Each includes two refracting parts separated from each other, and the two refracting parts are side walls of two adjacent hollow parts, respectively. The light guide plate according to claim 1,
The light-reflecting plates may have the same or different refractive powers. The light guide plate according to claim 1,
The shortest distances from the plurality of condensing refracting surfaces to the light incident surface are the same or different. The light guide plate according to claim 1,
And further comprising at least one second hollow structure, the at least one second hollow structure being located between the at least one light incident surface and the at least one first hollow structure, and from the light exit surface. Penetrating to the bottom surface, each of the second hollow structures includes a plurality of reflecting surfaces, the plurality of reflecting surfaces corresponding to the light incident surface and the corresponding plurality of condensing refracting surfaces of the first hollow structure. And the plurality of reflecting surfaces respectively correspond to the plurality of condensing and refracting surfaces. The light guide plate according to claim 7,
Each of the second hollow structures includes a plurality of hollow patterns separated from each other, the plurality of hollow patterns partition the corresponding light incident surfaces into a plurality of light incident portions separated from each other, and the plurality of reflections Each of the surfaces includes two reflective portions separated from each other, and the two reflective portions are side walls of two adjacent hollow patterns, respectively, and the two reflective portions are the plurality of light incident portions. A light guide plate connected to one of the two. The light guide plate according to claim 1,
And further including at least one reflective layer disposed on the at least one light incident surface, each of the at least one reflective layer having a plurality of openings exposed from the corresponding light incident surface. Is a light guide plate corresponding to the plurality of condensing and refracting surfaces. The light guide plate according to claim 9,
Each of said at least 1 light-incidence surface is a light-guide plate which has several protrusion part each installed in these openings. A light source module,
Including a light guide plate and at least one light emitting assembly;
The light guide plate has at least one light entrance surface, a light exit surface, a bottom surface, and at least one first hollow structure, the light exit surface is opposed to the bottom surface, and the at least one light entrance surface is the light exit surface. Connected between a surface and the bottom surface, the at least one first hollow structure is installed corresponding to the at least one light incident surface, and each first hollow structure extends from the light exit surface to the bottom surface. Penetrating and adjacent to the corresponding light incident surface, each first hollow structure includes a plurality of condensing and refracting surfaces disposed along the light incident surface,
The at least one light emitting assembly is disposed in the vicinity of the at least one light incident surface and corresponds to the at least one first hollow structure, and each of the light emitting assemblies includes a plurality of light emitting elements, Each of the light emitting elements is a light source module facing the plurality of condensing and refracting surfaces of the corresponding first hollow structure. The light source module according to claim 11,
The light guide plate further includes at least one second hollow structure, the at least one second hollow structure positioned between the at least one light incident surface and the at least one first hollow structure; and Each of the second hollow structures extends from the light exit surface to the bottom surface, and each of the second hollow structures has a plurality of reflections positioned between the corresponding light incident surface and the plurality of light collecting and refracting surfaces of the corresponding first hollow structure. The light source module includes a surface, and the plurality of reflecting surfaces respectively correspond to the plurality of condensing and refracting surfaces. The light source module according to claim 11,
And further including at least one reflective layer disposed on the at least one light incident surface, each of the at least one reflective layer having a plurality of openings exposed from the corresponding light incident surface. Respectively correspond to the plurality of condensing and refracting surfaces, and the plurality of light emitting elements of the light emitting assembly are respectively installed to face the plurality of openings. The light source module according to claim 13,
Each of the at least one light incident surface has a plurality of protrusions respectively installed in the plurality of openings, and the plurality of light emitting elements of the light emitting assembly are respectively opposed to the plurality of protrusions. Installed light source module.

Images