Light source module

Abstract

To provide a light source module excellent in a dynamic effect of an image and advantageous in terms of costs.SOLUTION: A light source module includes a light guide plate, a first light source, a plurality of first optical fine structures, and a plurality of second optical fine structures. The light guide plate includes a first light entrance surface and a bottom surface. The first light source is arranged on one side of the first light entrance surface of the light guide plate. The plurality of first optical fine structures is arranged on the bottom surface of the light guide plate and positioned in a first region of the bottom surface. In each of the first optical fine structures, a first light reception surface arranged directed to a first light source installation includes a first marginal part connected to the bottom surface and a center perpendicular of the first marginal part passes through the first light source. The plurality of second optical fine structures is arranged on the bottom surface of the light guide plate and positioned in a second region of the bottom surface. The first region does not overlap with the second region. A second light reception surface of each of the second optical fine structures includes a second marginal part connected to the bottom surface, and a center perpendicular of the second marginal part does not pass through the first light source.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a light source module, and more particularly to a light source module having a display function. [Background technology]

[0002] With the advancement of lighting technology, in addition to lamps that generally provide lighting functions, decorative lighting panels (light source modules) that provide decorative effects have also been developed. In this kind of decorative lighting panel, optical microstructures are formed on the bottom surface of the light guide plate, and the position of each optical microstructure and the angle of its reflective surface are arranged according to the effect that the decorative lighting panel needs to present. The light emitted by the light source enters the side (light entrance surface) of the light guide plate, is reflected by the optical microstructure, and then propagates toward the light emission surface of the light guide plate and emits light, allowing the user to visually recognize patterns and characters formed by light on the light emission surface side of the light guide plate.

[0003] In recent years, there has been a gradually increasing demand for using decorative lighting panels to present clearer images to improve the visual experience of viewers. To improve the dynamic effect of an image, the number of light sources can be increased, or addressable or programmable light sources can be used.

[0004] The "Background" section is used solely to aid in the understanding of the present invention, and therefore the disclosure in the "Background" section may include prior art that does not constitute prior art known to those of skill in the art. The disclosure in the "Background" section does not imply that the subject matter or problems solved by one or more embodiments of the present invention were known or appreciated by those of skill in the art prior to the application of the present invention. Summary of the Invention [Problem to be solved by the invention]

[0005] However, these methods not only increase the manufacturing cost, but also the driving circuit boards used in general decorative lighting panel products cannot be directly applied to decorative lighting panel products with this kind of dynamic effect. [Means for solving the problem]

[0006] The present invention provides a light source module that has excellent dynamic effect of the image presented and has cost advantages.

[0007] In order to achieve one, some or all of the above objects or other objects, an embodiment of the present invention provides a light source module. The light source module includes a light guide plate, a first light source, a plurality of first optical microstructures, and a plurality of second optical microstructures. The light guide plate has a first light-entering surface and a bottom surface connected to the first light-entering surface. The first light source is disposed on one side of the first light-entering surface of the light guide plate. The plurality of first optical microstructures are disposed on the bottom surface of the light guide plate and located within a first region of the bottom surface. These first optical microstructures each have a first light-receiving surface disposed toward the first light source. The first light-receiving surface has a first edge connected to the bottom surface, and a central normal of the first edge passes through the first light source. The plurality of second optical microstructures are disposed on the bottom surface of the light guide plate and located within a second region of the bottom surface. The first region does not overlap with the second region. Each of the second optical microstructures has a second light-receiving surface having a second edge connected to the base surface, and a central normal of the second edge does not pass through the first light source. Effect of the Invention

[0008] Based on the above, in the light source module of one embodiment of the present invention, the bottom surface of the light guide plate has a plurality of first optical microstructures arranged in a first region, and a plurality of second optical microstructures arranged in a second region. The central perpendicular of the first edge of the first light receiving surface of the first optical microstructure passes through the first light source, but the central perpendicular of the second edge of the second light receiving surface of the second optical microstructure does not pass through the first light source. With this arrangement, the main light emission direction of the light emitted by the first light source after reflection by the first optical microstructure is different from the main light emission direction after reflection by the second optical microstructure. Therefore, the magnitude relationship of the emission brightness of the first region and the second region changes according to the viewing angle, thereby showing a dynamic effect of changing the emission distribution.

[0009] Although the present invention has been disclosed through the embodiments, these are not intended to limit the present invention, and those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention, which should be determined by the scope of the appended claims. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic front view of a light source module according to a first embodiment of the present invention. [Figure 2A] 2 is a schematic side view of the light source module of FIG. 1. [Figure 2B] 2 is a schematic cross-sectional view of the light source module of FIG. 1. [Diagram 3] 2A-2C are schematic diagrams illustrating the distribution of normalized luminance versus viewing angle after light is reflected by the optical microstructures in different regions of FIG. 1. [Figure 4A] 2A-2C are schematic diagrams of images shown by the light source module of FIG. 1 in three viewing angle directions parallel to the light input surface of the light guide plate. [Figure 4B] 2A-2C are schematic diagrams of images shown by the light source module of FIG. 1 in three viewing angle directions parallel to the light input surface of the light guide plate. [Figure 4C] 2A-2C are schematic diagrams of images shown by the light source module of FIG. 1 in three viewing angle directions parallel to the light input surface of the light guide plate. [Diagram 5] FIG. 4 is a schematic front view of a light source module according to a second embodiment of the present invention. [Figure 6A] 6 is a schematic side view of the light source module of FIG. 5. [Figure 6B] 6 is a schematic cross-sectional view of the light source module of FIG. 5. [Figure 7A] 6 is a schematic diagram of an image shown by the light source module of FIG. 5 in three viewing angle directions parallel to a plane perpendicular to the light input surface and the light output surface of the light guide plate. [Figure 7B] 6 is a schematic diagram of an image shown by the light source module of FIG. 5 in three viewing angle directions parallel to a plane perpendicular to the light input surface and the light output surface of the light guide plate. [Figure 7C] 6 is a schematic diagram of an image shown by the light source module of FIG. 5 in three viewing angle directions parallel to a plane perpendicular to the light input surface and the light output surface of the light guide plate. [Figure 8] FIG. 11 is a schematic front view of a light source module according to a third embodiment of the present invention. [Figure 9A] 9 is a schematic side view of the light source module of FIG. 8. [Figure 9B] 9 is a schematic cross-sectional view of the light source module of FIG. 8. [Figure 10] FIG. 10 is a schematic front view of a light source module according to a fourth embodiment of the present invention. [Figure 11] FIG. 13 is a schematic front view of a light source module according to a fifth embodiment of the present invention. [Figure 12] FIG. 13 is a schematic front view of a light source module according to a sixth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The above and other technical contents, features and effects of the present invention will be clearly shown in the following detailed description of preferred embodiments with reference to the drawings. The directional terms (e.g., up, down, left, right, front or back, etc.) mentioned in the following embodiments are intended to refer exclusively to the directions in the drawings. Therefore, the directional terms used are intended to illustrate, not to limit, the present invention.

[0012] FIG 1 is a schematic front view of a light source module according to a first embodiment of the present invention. FIG 2A is a schematic side view of the light source module of FIG 1. FIG 2B is a schematic cross-sectional view of the light source module of FIG 1. FIG 3 is a schematic distribution diagram of normalized luminance versus viewing angle after light is reflected by the optical microstructures in different regions of FIG 1. FIG 4A to FIG 4C are schematic diagrams of images shown by the light source module of FIG 1 on three viewing angle directions parallel to the light input surface of the light guide plate, respectively.

[0013] 1, 2A and 2B, the light source module 10 includes a light guide plate 100, a first light source 121 and a plurality of optical microstructures. The light guide plate 100 includes a first light entrance surface 100is1, a light emission surface 100es and a bottom surface 100bs. The light emission surface 100es and the bottom surface 100bs are opposite to each other and are both connected to the first light entrance surface 100is1. The first light source 121 is disposed on one side of the first light entrance surface 100is1 of the light guide plate 100. The first light source 121 is, for example, a light emitting diode or other light emitting component. The plurality of optical microstructures are disposed on the bottom surface 100bs of the light guide plate 100.

[0014] For example, in this embodiment, the bottom surface 100bs of the light guide plate 100 may have a first region Z1, a second region Z2, and a third region Z3. A plurality of optical microstructures MS1 are arranged in the first region Z1. A plurality of optical microstructures MS2 are arranged in the second region Z2. A plurality of optical microstructures MS3 are arranged in the third region Z3.

[0015] It should be particularly noted that these regions of the bottom surface 100bs do not overlap along the normal direction (e.g., the axial direction of the Z axis) of the light emitting surface 100es. That is, these regions are each continuously distributed on the bottom surface 100bs. From another perspective, a single (or a small number) of optical microstructures MS1, MS2, and MS3 are not arranged alternately.

[0016] In this embodiment, the optical microstructures MS1 located in the first region Z1 each have a plurality of light receiving surfaces rs1 facing the first light source 121. These light receiving surfaces rs1 each have an edge portion e1 connected to the bottom surface 100bs. The optical microstructures MS2 located in the second region Z2 each have a plurality of light receiving surfaces rs2. These light receiving surfaces rs2 each have an edge portion e2 connected to the bottom surface 100bs. The optical microstructures MS3 located in the third region Z3 each have a plurality of light receiving surfaces rs3. These light receiving surfaces rs3 each have an edge portion e3 connected to the bottom surface 100bs. Specifically, in this embodiment, each of the optical microstructures described above is, for example, a concave triangular prism-shaped structure.

[0017] It is particularly noteworthy that the central perpendicular line PB1 of edge e1 passes through the first light source 121 (for example, the orthogonal projection of the central perpendicular line PB1 on the virtual extension surface of the bottom surface 100bs passes through the orthogonal projection area of ​​the first light source 121 on the virtual extension surface of the bottom surface 100bs, as shown in FIG. 1. In the present invention, similar content has been described above, so the explanation will not be repeated), but the central perpendicular line PB2 of edge e2 and the central perpendicular line PB3 of edge e3 do not pass through the first light source 121. More specifically, in this embodiment, the central perpendicular line PB2 of the edge e2 of the light receiving surface rs2 of each of the multiple optical microstructures MS2 passes through the same side of the first light source 121 (for example, the upper side of the first light source 121 in Figure 1, but is not limited to this), and the central perpendicular line PB3 of the edge e3 of the light receiving surface rs3 of each of the multiple optical microstructures MS3 passes through the same other side of the first light source 121 (for example, the lower side of the first light source 121 in Figure 1, but is not limited to this).

[0018] For example, in this embodiment, the central perpendicular line PB1 of the edge e1 of the light receiving surface rs1 of each optical microstructure MS1 passes through the light emitting surface 121es of the first light source 121. For example, it roughly passes through the geometric center GC1 of the light emitting surface 121es (for example, the central perpendicular line PB1 and the light emitting surface 121es have an intersection point, and the deviation amount of the intersection point from the geometric center GC1 is 5% or less of the width of the light emitting surface 121es in the Y direction). That is, the edge e1 of each optical microstructure MS1 is not necessarily parallel. On the other hand, the geometric center GC2 of the optical microstructure MS2 (for example, the geometric center of the orthogonal projection area on the bottom surface 100bs of the optical microstructure MS2) and the geometric center GC1 of the first light source 121 have a virtual connecting line. The central perpendicular line PB2 of the edge e2 of the light receiving surface rs2 of each optical microstructure MS2 is deflected clockwise by an angle θ1 with respect to the virtual connecting line, and the deflection angle θ1 varies depending on the relative positions of the optical microstructure MS2 and the first light source 121. The geometric center GC3 of the optical microstructure MS3 and the geometric center GC1 of the first light source 121 also have a virtual connecting line, and the central perpendicular line PB3 of the edge e3 of the light receiving surface rs3 of each optical microstructure MS3 is deflected counterclockwise by an angle θ2 with respect to the virtual connecting line, and the deflection angle θ2 varies depending on the relative positions of the optical microstructure MS3 and the first light source 121. The clockwise deflection or counterclockwise deflection referred to here is, for example, a rotation of the optical microstructure according to a rotation axis (not shown) that passes through its geometric center and is parallel to the Z axis. In one embodiment, as shown in FIG. 1, the intersection of the central perpendicular line PB2 of each optical microstructure MS2 and the extension plane (not shown) of the light-emitting surface 121es of the first light source 121 is located on one side of the first light source 121, and the distance between the central perpendicular line PB3 of each optical microstructure MS3 and the extension plane of the light-emitting surface 121es of the first light source 121 in the Y direction is, for example, 2 to 10 times (or 2 to 5 times) the width of the light-emitting surface 121es of the first light source 121 in the Y direction.

[0019] Meanwhile, the light receiving surface rs1 of the optical microstructure MS1 and the virtual extension surface of the bottom surface 100bs have a base angle α1 (shown in FIG. 2B). The light receiving surface rs2 of the optical microstructure MS2 and the virtual extension surface of the bottom surface 100bs have a base angle α2. The light receiving surface rs3 of the optical microstructure MS3 and the virtual extension surface of the bottom surface 100bs have a base angle α3. In this embodiment, the base angle α1 of the optical microstructure MS1, the base angle α2 of the optical microstructure MS2, and the base angle α3 of the optical microstructure MS3 are, for example, the same.

[0020] In this embodiment, the first light source 121 is adapted to emit a first light L1, a second light L2, and a third light L3 toward the plurality of optical microstructures MS1, the plurality of optical microstructures MS2, and the plurality of optical microstructures MS3, respectively. The first light L1 has a first main light emission direction MED1 after being reflected by the plurality of optical microstructures MS1. The second light L2 has a second main light emission direction MED3 after being reflected by the plurality of optical microstructures MS2. The third light L3 has a third main light emission direction MED3 after being reflected by the plurality of optical microstructures MS3.

[0021] It is particularly noteworthy that the first main light emission direction MED1 of the first light L1 reflected by the optical microstructure MS1, the second main light emission direction MED2 of the second light L2 reflected by the optical microstructure MS2, and the third main light emission direction MED3 of the third light L3 reflected by the optical microstructure MS3 are different from each other, as shown in FIG. 2A.

[0022] More specifically, in this embodiment, the first main light emission direction MED1 may be parallel to the Z axis (i.e., perpendicular to the X axis and the Y axis). Here, the X axis, the Y axis, and the Z axis are mutually orthogonal. That is, the first main light emission direction MED1 is perpendicular to the light emission surface 100es of the light guide plate 100 (i.e., the XY plane formed by the X axis and the Y axis).

[0023] However, neither the second principal light emission direction MED2 nor the third principal light emission direction MED3 is parallel to the Z axis. More specifically, the orthogonal projection MED2yz of the second principal light emission direction MED2 on the YZ plane (i.e., the plane formed by the Y axis and the Z axis) has a component in the same direction as the axial direction of the Y axis (as shown in FIG. 2A), and the orthogonal projection MED3yz of the third principal light emission direction MED3 on the YZ plane has a component in the opposite direction to the axial direction of the Y axis (as shown in FIG. 2A).

[0024] From another point of view, an angle β1 is formed between the orthogonal projection MED2yz of the second principal light radiation direction MED2 on the YZ plane and the orthogonal projection MED1yz of the first principal light radiation direction MED1 on the YZ plane, and an angle β2 is formed between the orthogonal projection MED3yz of the third principal light radiation direction MED3 on the YZ plane and the orthogonal projection MED1yz of the first principal light radiation direction MED1 on the YZ plane. In this embodiment, the orthogonal projections MED2yz and MED3yz of the second principal light radiation direction MED2 and the third principal light radiation direction MED3 on the YZ plane may be located on opposite sides of the orthogonal projection MED1yz of the first principal light radiation direction MED1 on the YZ plane, respectively, and the angles β1 and β2 may be selectively the same, but are not limited thereto.

[0025] It should be particularly noted that, since the base angle α1 of the optical microstructure MS1, the base angle α2 of the optical microstructure MS2, and the base angle α3 of the optical microstructure MS3 in this embodiment are all the same, the first principal light emission direction MED1, the second principal light emission direction MED2, and the third principal light emission direction MED3 are all parallel to the first light incident surface 100is1 or the YZ plane of the light guide plate 100. That is, the orthogonal projections MED1xz, MED2xz, and MED3xz of the first principal light emission direction MED1, the second principal light emission direction MED2, and the third principal light emission direction MED3 on the XZ plane (i.e., the plane formed by the X-axis and the Z-axis) do not have any components in the same direction or opposite direction to the axial direction of the X-axis.

[0026] That is, in this embodiment, the first principal light emission direction MED1, the second principal light emission direction MED2 and the third principal light emission direction MED3 are not parallel to each other in the dimension of the YZ plane (as shown in FIG. 2A), but are parallel to each other in the dimension of the XZ plane (as shown in FIG. 2B).

[0027] In the dimension of the YZ plane, the distribution curves of normalized luminance versus viewing angle of the first light L1 reflected by the optical microstructure MS1 of the first region Z1, the second light L2 reflected by the optical microstructure MS2 of the second region Z2, and the third light L3 reflected by the optical microstructure MS3 of the third region Z3 are as shown in Fig. 3. As can be seen from Fig. 3, in this embodiment, the first main light emission direction MED1 of the first light L1 is, for example, a direction of a viewing angle of 0 degrees, the second main light emission direction MED2 of the second light L2 is, for example, a direction of a viewing angle of -10 degrees, and the third main light emission direction MED3 of the third light L3 is, for example, a direction of a viewing angle of +10 degrees.

[0028] Of particular note is that in the first principal light emission direction MED1 (for example, when viewed from a direction of a viewing angle of 0 degrees), the emission luminance of the first region Z1 is significantly higher than the emission luminance of the second region Z2 and the emission luminance of the third region Z3, and the emission luminance of the second region Z2 is equivalent to the emission luminance of the third region Z3. In the second principal light emission direction MED2, the emission luminance of the second region Z2 is significantly higher than the emission luminance of the first region Z1 and the emission luminance of the third region Z3, and the emission luminance of the first region Z1 is higher than the emission luminance of the third region Z3. In the third principal light emission direction MED3, the emission luminance of the third region Z3 is significantly higher than the emission luminance of the first region Z1 and the emission luminance of the second region Z2, and the emission luminance of the first region Z1 is higher than the emission luminance of the second region Z2. In this way, when a user views the light guide plate 100 from different directions, he or she can observe different luminance changes in different regions.

[0029] 4A to 4C, in this embodiment, the light guide plate 100 is, for example, a decorative lighting panel, and the orthogonal projection of the first area Z1, the second area Z2, and the third area Z3, in which different optical microstructures are arranged, on the light emitting surface 100es can constitute a decorative pattern. For example, the pattern shown in FIG. 4A is a house pattern (the present invention does not particularly limit the content of the pattern), and the first area Z1, the second area Z2, and the third area Z3 are different areas (such as walls and roofs) that constitute the house pattern. It should be particularly noted that the first area Z1, the second area Z2, and the third area Z3 described in the present invention are not general decorative patterns that produce a flashing effect, so the size of each area is relatively large. For example, the length of the first region Z1 (second region Z2) is at least 1 / 10 or more of the length of the light guide plate 100, and the width of the first region Z1 (second region Z2) is at least 1 / 10 or more of the width of the light guide plate 100. As shown in Fig. 4A, when a user views the light guide plate 100 at a viewing angle of -10 degrees in the dimension of the YZ plane (e.g., the upper viewing angle along the YZ plane in Fig. 4B), the luminance of the second region Z2 is higher than the emission luminance of each of the first region Z1 and the third region Z3, and the emission luminance of the first region Z1 is higher than the emission luminance of the third region Z3.

[0030] As shown in FIG. 4B, when a user views the light guide plate 100 at a viewing angle of 0 degrees in the dimension of the YZ plane (e.g., the main viewing angle along the YZ plane in FIG. 4B), the luminance of the first region Z1 is higher than the emission luminance of each of the second region Z2 and the third region Z3, and the emission luminance of the second region Z2 is equal to the emission luminance of the third region Z3.

[0031] As shown in FIG. 4C, when a user views the light guide plate 100 at a viewing angle of +10 degrees in the dimension of the YZ plane (e.g., a lower viewing angle along the YZ plane in FIG. 4B), the luminance of the third region Z3 is higher than the emission luminance of each of the second region Z2 and the first region Z1, and the emission luminance of the first region Z1 is higher than the emission luminance of the second region Z2.

[0032] That is, when a user looks at the decorative pattern composed of the first area Z1, the second area Z2 and the third area Z3 at different viewing angles in the dimension of the YZ plane, the luminance distribution of the decorative pattern changes according to the viewing angle, thereby generating a dynamic effect of light and shadow change. As a result, a three-dimensional visual effect can be generated in the planar pattern during the process of the user moving and observing the light guide plate 100. Meanwhile, the light source module 10 in this embodiment realizes the dynamic effect of light emission distribution by arranging the optical microstructures in different ways in different regions of the light guide plate 100, so that the manufacturing cost of the light source module 10 can be further reduced compared to the existing method of increasing the number of light sources arranged or selecting an addressable light source.

[0033] In order to describe the present disclosure in detail, several other embodiments are listed below, but the same components are given the same reference numerals. In addition, the description of the same technical contents is omitted, and the omitted parts can be referred to the above-mentioned embodiments, so that the repeated description is omitted below.

[0034] Fig. 5 is a schematic front view of a light source module according to a second embodiment of the present invention. Fig. 6A is a schematic side view of the light source module of Fig. 5. Fig. 6B is a schematic cross-sectional view of the light source module of Fig. 5. Figs. 7A to 7C are schematic views of images shown by the light source module of Fig. 5 in three viewing angle directions parallel to a plane perpendicular to the light input surface and the light output surface of the light guide plate, respectively.

[0035] Referring to Figures 5, 6A and 6B, unlike the light guide plate 100 of Figures 1 and 2, in the light source module 10A of this embodiment, the base angle α1" of the light receiving surface rs1-A of the optical microstructure MS1-A of the light guide plate 100A may be selectively larger than the base angle α3" of the light receiving surface rs3-A of the optical microstructure MS3-A, and may also be selectively smaller than the base angle α2" of the light receiving surface rs2-A of the optical microstructure MS2-A. In other embodiments, the magnitude relationship of the angles of the base angle α1", base angle α2" and base angle α3" can be adjusted according to actual conditions.

[0036] That is, the base angles of the optical microstructures MS1-A, MS2-A, and MS3-A of this embodiment are all different. Therefore, the first light L1'', the second light L2'', and the third light L3'', which are respectively reflected by these optical microstructures, are not parallel to each other in the dimension of the XZ plane, as shown in FIG.

[0037] For example, in this embodiment, the orthogonal projection MED1xz of the first principal light emission direction MED1-A of the first light L1" on the XZ plane is parallel to the Z axis, and the orthogonal projection MED2xz of the second principal light emission direction MED2-A of the second light L2" on the XZ plane and the orthogonal projection MED3xz of the third principal light emission direction MED3-A of the third light L3" on the XZ plane are not parallel to the Z axis. More specifically, the orthogonal projection MED2xz of the second principal light emission direction MED2-A on the XZ plane has a component in the opposite direction to the axial direction of the X axis (as shown in FIG. 6B), and the orthogonal projection MED3xz of the third principal light emission direction MED3-A on the XZ plane has a component in the same direction as the axial direction of the X axis (as shown in FIG. 6B).

[0038] From another point of view, an angle β3 is formed between the orthogonal projection MED2xz on the XZ plane of the second principal light radiation direction MED2-A and the orthogonal projection MED1xz on the XZ plane of the first principal light radiation direction MED1-A, and an angle β4 is formed between the orthogonal projection MED3xz on the XZ plane of the third principal light radiation direction MED3-A and the orthogonal projection MED1xz on the XZ plane of the first principal light radiation direction MED1-A. In this embodiment, the orthogonal projections MED2xz and MED3xz on the XZ plane of the second principal light radiation direction MED2-A and the third principal light radiation direction MED3-A may be located on opposite sides of the orthogonal projection MED1xz on the XZ plane of the first principal light radiation direction MED1-A, and the angles β3 and β4 may be selectively the same, but are not limited thereto.

[0039] In this embodiment, the positional relationship between each of the optical microstructures MS1-A, MS2-A, and MS3-A and the first light source 121 is similar to the positional relationship between each of the optical microstructures MS1, MS2, and MS3 and the first light source 121 in Figure 1, and for detailed explanations, please refer to the relevant paragraphs of the preceding embodiments, so the explanation will not be repeated here.

[0040] Based on the above-mentioned arrangement, in the light source module 10A of this embodiment, the first main light emission direction MED1-A, the second main light emission direction MED2-A, and the third main light emission direction MED3-A are not parallel to each other in the dimension of the YZ plane, and are also not parallel to each other in the dimension of the XZ plane. Specifically, as shown in the schematic diagram of FIG. 5, the first main light emission direction MED1-A emits light forward, the second main light emission direction MED2-A emits light toward the upper left, and the third main light emission direction MED3-A emits light toward the lower right.

[0041] It should be particularly noted that in this embodiment, the base angles α1" of each optical microstructure MS1-A are all the same, the base angles α2" of each optical microstructure MS2-A are all the same, and the base angles α3" of each optical microstructure MS3-A are all the same, but the present invention is not limited thereto. In other embodiments, the base angles α1" of each optical microstructure MS1-A can be gradually changed, the base angles α2" of each optical microstructure MS2-A can be gradually changed, and the base angles α3" of each optical microstructure MS3-A can also be gradually changed, so that the brightness in each region can be slightly changed in the dimension of the XZ plane. In another embodiment, the light guide plate, for example, only has a plurality of optical microstructures MS1-A, and the plurality of optical microstructures MS1-A can be divided into different microstructure groups. The base angle α1" of the optical microstructures MS1-A in each microstructure group is the same, but the base angle α1" of the optical microstructures MS1-A in different microstructure groups is different. In this way, the brightness of the light-emitting areas corresponding to each microstructure group may be different in the dimension of the XZ plane.

[0042] In this embodiment, when a user views the light guide plate 100A from the left viewing angle in FIG. 7A in the dimension of the XZ plane, the luminance of the second region Z2 is higher than the luminance of the first region Z1 and the luminance of the third region Z3, and the luminance of the first region Z1 is higher than the luminance of the third region Z3.

[0043] When a user views the light guide plate 100A from the primary viewing angle in FIG. 7B in the dimension of the XZ plane, the luminance of the first region Z1 is higher than the luminance of the second region Z2 and the luminance of the third region Z3, and the luminance of the second region Z2 is equal to the luminance of the third region Z3.

[0044] When a user views the light guide plate 100A from the right viewing angle in FIG. 7C in the dimension of the XZ plane, the luminance of the third region Z3 is higher than the luminance of the second region Z2 and the first region Z1, and the luminance of the first region Z1 is higher than the luminance of the second region Z2.

[0045] The luminance distribution changes when the light guide plate 100A in this embodiment is viewed from different viewing angles in the YZ plane dimension are similar to those of the light guide plate 100 in Figures 4A to 4C, and for detailed descriptions, reference can be made to the relevant paragraphs of the preceding embodiments, so they will not be described again here.

[0046] In this embodiment, when a user views the decorative pattern composed of the first area Z1, the second area Z2 and the third area Z3 at different viewing angles in the dimension of the XZ plane or the YZ plane, the luminance distribution of the decorative pattern changes according to the viewing angle, thereby generating a dynamic effect of light and shadow change. Meanwhile, the light source module 10A in this embodiment realizes the dynamic effect of light emission distribution by arranging the optical microstructures in different ways in different regions of the light guide plate 100A, and compared with the existing method of increasing the number of light sources arranged or selecting addressable light sources, the light source module 10A can further reduce the manufacturing cost.

[0047] Fig. 8 is a schematic front view of a light source module according to a third embodiment of the present invention. Fig. 9A is a schematic side view of the light source module of Fig. 8. Fig. 9B is a schematic cross-sectional view of the light source module of Fig. 8. Referring to Figs. 8, 9A and 9B, the light source module 10B of this embodiment differs from the light source module 10 of Fig. 1 in the number of light sources and the number of optical microstructures.

[0048] Specifically, in this embodiment, the light source module 10B further includes a second light source 122, a plurality of optical microstructures MS4, a plurality of optical microstructures MS5 and a plurality of optical microstructures MS6. The second light source 122 is disposed on one side of the second light-entering surface 100is2 of the light guide plate 100B. The second light-entering surface 100is2 connects the bottom surface 100bs and the first light-entering surface 100is1. The plurality of optical microstructures MS4 (i.e., the third optical microstructures) are disposed on the bottom surface 100bs of the light guide plate 100B and are located in the first region Z1. The plurality of optical microstructures MS5 (i.e., the fourth optical microstructures) are disposed on the bottom surface 100bs of the light guide plate 100B and are located in the second region Z2. The plurality of optical microstructures MS6 are disposed on the bottom surface 100bs of the light guide plate 100B and are located in the third region Z3.

[0049] In this embodiment, the plurality of optical microstructures MS4 located in the first region Z1 each have a plurality of light receiving surfaces rs4 facing the second light source 122. These light receiving surfaces rs4 each have an edge e4 connected to the bottom surface 100bs. The plurality of optical microstructures MS5 located in the second region Z2 each have a plurality of light receiving surfaces rs5. These light receiving surfaces rs5 each have an edge e5 connected to the bottom surface 100bs. The plurality of optical microstructures MS6 located in the third region Z3 each have a plurality of light receiving surfaces rs6. These light receiving surfaces rs6 each have an edge e6 connected to the bottom surface 100bs.

[0050] It should be particularly noted that the central perpendicular line PB4 of the edge e4 passes through the second light source 122 (for example, the orthogonal projection of the central perpendicular line PB4 on the virtual extension surface of the bottom surface 100bs passes through the orthogonal projection area of ​​the second light source 122 on the virtual extension surface of the bottom surface 100bs), but the central perpendicular line PB5 of the edge e5 and the central perpendicular line PB6 of the edge e6 do not pass through the second light source 122. More specifically, in this embodiment, the central perpendicular line PB5 of the edge e5 of the light receiving surface rs5 of each of the plurality of optical microstructures MS5 passes through the same side of the second light source 122 (for example, the left side of the second light source 122 in FIG. 8, but is not limited thereto), but the central perpendicular line PB6 of the edge e6 of the light receiving surface rs6 of each of the plurality of optical microstructures MS6 passes through the same other side of the second light source 122 (for example, the right side of the second light source 122 in FIG. 8, but is not limited thereto).

[0051] For example, in this embodiment, the central perpendicular line PB4 of the edge e4 of the light receiving surface rs4 of each optical microstructure MS4 passes through the light emitting surface 122es of the second light source 122, for example, through the geometric center GC4 of the light emitting surface 122es. That is, the edge e4 of each optical microstructure MS4 is not necessarily parallel. Meanwhile, the geometric center GC5 of the optical microstructure MS5 (for example, the geometric center of the orthogonal projection area on the bottom surface 100bs of the optical microstructure MS5) and the geometric center GC4 of the second light source 122 have a virtual connecting line, and the central perpendicular line PB5 of the edge e5 of the light receiving surface rs5 of each optical microstructure MS5 is deflected clockwise by an angle θ3 with respect to the virtual connecting line, and the deflection angle θ3 changes depending on the relative positions of the optical microstructure MS5 and the second light source 122. The geometric center GC6 of the optical microstructure MS6 and the geometric center GC4 of the second light source 122 also have a virtual connecting line, and the central perpendicular PB6 of the edge e6 of the light-receiving surface rs6 of each optical microstructure MS6 is deflected counterclockwise by an angle θ4 with respect to the virtual connecting line, and the deflection angle θ4 varies depending on the relative positions of the optical microstructure MS6 and the second light source 122. The clockwise or counterclockwise deflection referred to here is, for example, a rotation of the optical microstructure according to a rotation axis (not shown) passing through its geometric center and parallel to the Z-axis.

[0052] Meanwhile, the light receiving surface rs4 of the optical microstructure MS4 and the virtual extension surface of the bottom surface 100bs have a base angle α4. The light receiving surface rs5 of the optical microstructure MS5 and the virtual extension surface of the bottom surface 100bs have a base angle α5. The light receiving surface rs6 of the optical microstructure MS6 and the virtual extension surface of the bottom surface 100bs have a base angle α6. In this embodiment, the base angle α4 of the optical microstructure MS4, the base angle α5 of the optical microstructure MS5, and the base angle α6 of the optical microstructure MS6 are, for example, the same.

[0053] In this embodiment, the second light source 122 is adapted to emit a fourth light L4, a fifth light L5, and a sixth light L6 toward the plurality of optical microstructures MS4, the plurality of optical microstructures MS5, and the plurality of optical microstructures MS6, respectively. The fourth light L4 has a fourth main light emission direction MED4 after being reflected by the plurality of optical microstructures MS4. The fifth light L5 has a fifth main light emission direction MED5 after being reflected by the plurality of optical microstructures MS5. The sixth light L6 has a sixth main light emission direction MED6 after being reflected by the plurality of optical microstructures MS6.

[0054] It is particularly noteworthy that the fourth main light emission direction MED4 of the fourth light L4 reflected by the optical microstructure MS4, the fifth main light emission direction MED5 of the fifth light L5 reflected by the optical microstructure MS5, and the sixth main light emission direction MED6 of the sixth light L6 reflected by the optical microstructure MS6 are different from each other.

[0055] More specifically, in this embodiment, the fourth principal light emission direction MED4 may be parallel to the Z axis. That is, the first principal light emission direction MED1 is perpendicular to the light emission surface 100es (i.e., the XY plane) of the light guide plate 100. However, neither the fifth principal light emission direction MED5 nor the sixth principal light emission direction MED6 is parallel to the Z axis. More specifically, the orthogonal projection MED5xz of the fifth principal light emission direction MED5 on the XZ plane has a component in the opposite direction to the axial direction of the X axis, and the orthogonal projection MED6xz of the sixth principal light emission direction MED6 on the XZ plane has a component in the same direction as the axial direction of the X axis.

[0056] From another point of view, an angle β5 is defined between the orthogonal projection MED5xz of the fifth principal light emission direction MED5 on the XZ plane and the orthogonal projection MED4xz of the fourth principal light emission direction MED4 on the XZ plane, and an angle β6 is defined between the orthogonal projection MED6xz of the sixth principal light emission direction MED6 on the XZ plane and the orthogonal projection MED4xz of the fourth principal light emission direction MED4 on the XZ plane. In this embodiment, the orthogonal projections MED5xz and MED6xz of the fifth principal light emission direction MED5 and the sixth principal light emission direction MED6 on the XZ plane may be located on opposite sides of the orthogonal projection MED4xz of the fourth principal light emission direction MED4 on the XZ plane, respectively, and the angles β5 and β6 may be selectively the same, but are not limited thereto.

[0057] It should be particularly noted that, since the base angle α4 of the optical microstructure MS4, the base angle α5 of the optical microstructure MS5, and the base angle α6 of the optical microstructure MS6 in this embodiment are all the same, the fourth principal light emission direction MED4, the fifth principal light emission direction MED5, and the sixth principal light emission direction MED6 are all parallel to the second light incident surface 100is2 or the XZ plane of the light guide plate 100B. That is, the orthogonal projections MED4yz, MED5yz, and MED6yz of the fourth principal light emission direction MED4, the fifth principal light emission direction MED5, and the sixth principal light emission direction MED6 on the YZ plane do not have any components in the same direction or opposite direction to the axial direction of the Y axis.

[0058] That is, in this embodiment, the fourth principal light emission direction MED4, the fifth principal light emission direction MED5 and the sixth principal light emission direction MED6 are not parallel to each other in the dimension of the XZ plane (as shown in FIG. 9A), but are parallel to each other in the dimension of the YZ plane (as shown in FIG. 9B).

[0059] In this embodiment, the positional relationships between each of the optical microstructures MS1, MS2, and MS3 and the first light source 121 are similar to the positional relationships between each of the optical microstructures MS1, MS2, and MS3 and the first light source 121 in Figure 1, and for detailed descriptions, please refer to the relevant paragraphs of the preceding embodiments, so the descriptions will not be repeated here.

[0060] It is particularly worth mentioning that the light source module 10A in Figures 5 to 6B realizes the dynamic effect of the light emission distribution in its XZ plane dimension by utilizing different base angles of the optical microstructures (as shown in Figures 7A to 7C). However, in this embodiment, the light source module 10B realizes the dynamic effect of the light emission distribution in its XZ plane dimension by adding a second group of light sources and optical microstructures.

[0061] 10 is a schematic front view of a light source module according to a fourth embodiment of the present invention. Referring to FIG. 10, the light source module 10C of this embodiment differs from the light source module 10 of FIG. 1 in the number of light sources. For example, in this embodiment, the light source module 10C is disposed on one side of the first light incident surface 100is1 of the light guide plate 100, and further includes an auxiliary light source 123 and an auxiliary light source 125 located on opposite sides of the first light source 121. The auxiliary light source 125, the first light source 121, and the auxiliary light source 123 are disposed in order along the Y direction, for example (the Y direction is, for example, parallel to the first light incident surface 100is1 and parallel to the light emitting surface 100es). Here, the distance between the center of the light-emitting surface of the auxiliary light source 123 and the center of the light-emitting surface 121es of the first light source 121 is, for example, within a range of 2 to 10 times the width in the Y direction of the light-emitting surface 121es of the first light source 121, and the distance between the center of the light-emitting surface of the other auxiliary light source 125 and the center of the light-emitting surface 121es of the first light source 121 is, for example, within a range of 2 to 10 times the width in the Y direction of the light-emitting surface 121es of the first light source 121.

[0062] It should be particularly noted that the emission luminance of each of the auxiliary light source 123, the auxiliary light source 125, and the first light source 121 is different. For example, in this embodiment, the emission luminance of the auxiliary light source 123 may be lower than that of the first light source 121 and higher than that of the auxiliary light source 125, but is not limited thereto. Therefore, the dynamic effect of the light and shadow change between different regions on the light guide plate 100 can be further improved. Preferably, the percentage of the emission luminance of each of the auxiliary light source 123 and the auxiliary light source 125 to the emission luminance of the first light source 121 may be less than 60%.

[0063] However, the present invention is not limited thereto. The emission color of at least one of the auxiliary light source 123 and the auxiliary light source 125 may be further different from the emission color of the first light source 121. Thus, the dynamic effect of the color of different regions on the light guide plate 100 changing according to the viewing angle can be further improved. Similarly, in the light source module 10B of FIG. 8, the emission colors of the first light source 121 and the second light source 122 may also be different to further improve the dynamic effect of the color of different regions on the light guide plate 100B changing according to the viewing angle.

[0064] Fig. 11 is a schematic front view of a light source module according to a fifth embodiment of the present invention. Referring to Fig. 11, the light source module 10D of this embodiment is different from the light source module 10C of Fig. 10 in that the driving circuits of the first light source 121 and the auxiliary light source are different. Specifically, in this embodiment, the first light source 121, the auxiliary light source 123a, and the auxiliary light source 125a are connected in parallel with each other, and the first light source 121, the auxiliary light source 123a, and the auxiliary light source 125a are connected in series with the first resistor R1, the second resistor R2, and the third resistor R3, respectively, and the resistance values ​​of these resistors are different from each other.

[0065] By connecting multiple resistors with different resistance values ​​in series with multiple light sources, respectively, the degree of freedom in selecting the first light source 121, the auxiliary light source 123a, and the auxiliary light source 125a can be improved. For example, by using multiple light-emitting elements with the same maximum light emission brightness and further connecting resistors with different resistance values ​​in series, the light emission brightness of each of these light-emitting elements can be controlled. Therefore, the dynamic effect of the light and shadow change between different regions on the light guide plate 100 can be improved.

[0066] FIG. 12 is a schematic front view of a light source module according to a sixth embodiment of the present invention. Referring to FIG. 12, the difference between the light source module 10E of this embodiment and the light source module 10C of FIG. 10 is that the configuration of the light guide plate is different. For example, in this embodiment, the first light entrance surface 100is1-A of the light guide plate 100E of the light source module 10E has a first sub-surface 100is1a, a second sub-surface 100is1b, and a third sub-surface 100is1c. The first light source 121 is disposed corresponding to the first sub-surface 100is1a. The auxiliary light source 123b is disposed corresponding to the second sub-surface 100is1b. The auxiliary light source 125b is disposed corresponding to the third sub-surface 100is1c.

[0067] The first light source 121 and the first sub-surface 100is1a have a first pitch S1 along the direction X, the auxiliary light source 123b and the second sub-surface 100is1b have a second pitch S2 along the direction X, and the auxiliary light source 125b and the third sub-surface 100is1c have a third pitch S3 along the direction X. Of particular note, in this embodiment, the second pitch S2 is larger than the first pitch S1 and smaller than the third pitch S3. That is, the first pitch S1, the second pitch S2 and the third pitch S3 are different from each other. For example, the second pitch S2 is two to four times the first pitch S1, and the third pitch S3 is three to six times the first pitch S1.

[0068] Since the optical coupling efficiency between the light source and the light guide plate decreases as the distance between the light source and the light guide plate increases, the light luminance emitted by the auxiliary light source 123b and coupled into the light guide plate 100E is smaller than the light luminance emitted by the first light source 121 and coupled into the light guide plate 100E, but is larger than the light luminance emitted by the auxiliary light source 125b and coupled into the light guide plate 100E. Therefore, the dynamic effect of the light and shadow changes between different regions on the light guide plate 100E can be further improved.

[0069] In summary, in the light source module of one embodiment of the present invention, the bottom surface of the light guide plate has a plurality of first optical microstructures arranged in a first region and a plurality of second optical microstructures arranged in a second region. The central perpendicular of the first edge of the first light receiving surface of the first optical microstructure passes through the first light source, but the central perpendicular of the second edge of the second light receiving surface of the second optical microstructure does not pass through the first light source. With this arrangement, the main light emission direction of the light emitted by the first light source after reflection by the first optical microstructure is different from the main light emission direction after reflection by the second optical microstructure. Therefore, the magnitude relationship between the emission brightness of the first region and the second region changes according to the viewing angle, thereby showing a dynamic effect of changing the emission distribution.

[0070] Although the present invention has been disclosed through the embodiments, these are not intended to limit the present invention, and those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention, which should be determined by the scope of the appended claims. [Industrial Applicability]

[0071] The light source module of the present invention can be applied to decorative lighting panel products. [Explanation of symbols]

[0072] 10, 10A, 10B, 10C, 10D, 10E: Light source module 100, 100A, 100B, 100E: Light guide plate 100bs:Bottom 100es:Light emitting surface 121es, 122es: smooth surface 100is1, 100is1-A: The first light incident surface 100is1a, 100is1b, 100is1c: Secondary side 100is2: The second light incident surface 121:The first light source 122:The second light source 123, 125, 123a, 125a, 123b, 125b: auxiliary light source e1, e2, e3, e4, e5, e6: edge GC1, GC2, GC3, GC4, GC5, GC6: Geometric Center L1, L2, L3, L1”, L2”, L3”, L4, L5, L6: light MED1, MED2, MED3, MED1-A, MED2-A, MED3-A, MED4, MED5, MED6: main light emission direction MED1xz, MED2xz, MED3xz, MED1yz, MED2yz, MED3yz, MED4xz, MED5xz, MED6xz, MED4yz, MED5yz, MED6yz: orthographic projection MS1, MS2, MS3, MS1-A, MS2-A, MS3-A, MS4, MS5, MS6: optical microstructure PB1, PB2, PB3, PB4, PB5, PB6: Center vertical line R1, R2, R3: Resistance rs1, rs2, rs3, rs1-A, rs2-A, rs3-A, rs4, rs5, rs6: light receiving surface S1, S2, S3:ピッチ β1, β2, β3, β4, β5, β6, θ1, θ2, θ3, θ4: angle α1, α2, α3, α1”, α2”, α3”, α4, α5, α6: bottom angle X, Y, Z: axis Z1, Z2, Z3: Field

Claims

1. a light guide plate, a first light source, a plurality of first optical microstructures, and a plurality of second optical microstructures; the light guide plate has a first light incident surface and a bottom surface connected to the first light incident surface, The first light source is disposed on one side of the first light incident surface of the light guide plate, The plurality of first optical microstructures are disposed on the bottom surface of the light guide plate and are located within a first region of the bottom surface, the plurality of first optical microstructures each have a first light-receiving surface disposed toward the first light source, the plurality of first light-receiving surfaces of the plurality of first optical microstructures each have a first edge connected to the bottom surface, and a central normal of the first edge passes through the first light source; the plurality of second optical microstructures are disposed on the bottom surface of the light guide plate and are located within a second region of the bottom surface, the first region does not overlap with the second region, the plurality of second optical microstructures each have a second light-receiving surface, the plurality of second light-receiving surfaces of the plurality of second optical microstructures each have a second edge connected to the bottom surface, and a central normal of the second edge does not pass through the first light source; A light source module comprising:

2. the first light source is adapted to emit first lights toward the plurality of first optical microstructures, each of the plurality of first lights having a first main light emission direction after being reflected by the plurality of first optical microstructures; the first light source is further adapted to emit second lights toward the plurality of second optical microstructures, each of the plurality of second lights having a second main light emission direction after being reflected by the plurality of second optical microstructures, and the first main light emission direction is different from the second main light emission direction; 2. The light source module according to claim 1 .

3. The first main light emission direction and the second main light emission direction are parallel to the first light incident surface of the light guide plate.

3. The light source module according to claim 2 .

4. The light guide plate further has a light emitting surface facing the bottom surface and connected to the first light input surface, and the first main light emission direction is perpendicular to the light emitting surface of the light guide plate.

3. The light source module according to claim 2 .

5. the central perpendiculars of the second edges of the second light receiving surfaces pass through the same side of the first light source; 3. The light source module according to claim 2 .

6. The first light-receiving surface and the virtual extension surface of the bottom surface of the plurality of first optical microstructures respectively have a first base angle, and the second light-receiving surface and the virtual extension surface of the bottom surface of the plurality of second optical microstructures respectively have a second base angle, and the first base angle is different from the second base angle; 3. The light source module according to claim 2 .

7. the light source module further includes an auxiliary light source disposed on one side of the first light incident surface of the light guide plate, the first light source and the auxiliary light source having different emission luminances; 2. The light source module according to claim 1 .

8. The first light source and the auxiliary light source are connected in parallel, the first light source and the auxiliary light source are connected in series with a first resistor and a second resistor, respectively, and the resistance value of the first resistor is different from the resistance value of the second resistor; The light source module according to claim 7 .

9. the light source module further includes an auxiliary light source disposed on one side of the first light incident surface of the light guide plate, the first light incident surface of the light guide plate has a first sub-surface and a second sub-surface, the first light source is disposed corresponding to the first sub-surface, the auxiliary light source is disposed corresponding to the second sub-surface, the first light source and the first sub-surface have a first pitch, the auxiliary light source and the second sub-surface have a second pitch, and the first pitch is different from the second pitch; 2. The light source module according to claim 1 .

10. the light source module further includes an auxiliary light source disposed on one side of the first light incident surface of the light guide plate, and the first light source and the auxiliary light source have different emission colors; 2. The light source module according to claim 1 .

11. The light source module further includes a second light source and a plurality of third optical microstructures; The second light source is disposed on one side of a second light incident surface of the light guide plate, and the second light incident surface is connected to the bottom surface and the first light incident surface; The plurality of third optical microstructures are disposed on the bottom surface of the light guide plate and are located within the first region of the bottom surface, the plurality of third optical microstructures each have a third light-receiving surface disposed toward the second light source, the plurality of third light-receiving surfaces of the plurality of third optical microstructures each have a third edge connected to the bottom surface, and a central normal of the third edge passes through the second light source.

2. The light source module according to claim 1 .

12. The light source module further includes a plurality of fourth optical microstructures disposed on the bottom surface of the light guide plate and located within the second region of the bottom surface, the plurality of fourth optical microstructures each having a fourth light-receiving surface, the plurality of fourth light-receiving surfaces of the plurality of fourth optical microstructures each having a fourth edge connected to the bottom surface, and a central normal of the fourth edge does not pass through the second light source; 12. The light source module according to claim 11,

13. The light source module further includes a second light source, a plurality of third optical microstructures, and a plurality of fourth optical microstructures; The second light source is disposed on one side of a second light incident surface of the light guide plate, and the second light incident surface is connected to the bottom surface and the first light incident surface; The plurality of third optical microstructures are disposed on the bottom surface of the light guide plate and are located within the first region of the bottom surface, the plurality of third optical microstructures each have a third light receiving surface disposed toward the second light source, and a first base angle is formed between the third light receiving surface of the plurality of third optical microstructures and a virtual extension plane of the bottom surface, respectively; The plurality of fourth optical microstructures are disposed on the bottom surface of the light guide plate and are located within the second region of the bottom surface, the plurality of fourth optical microstructures each have a fourth light receiving surface disposed toward the second light source, and the fourth light receiving surfaces of the plurality of fourth optical microstructures and the virtual extension surface of the bottom surface each have a second base angle, and the first base angle is different from the second base angle; 2. The light source module according to claim 1 .

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