Light source module

Abstract

The invention provides a light source module which comprises 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. The first light source is arranged on one side of the first incident surface of the light guide plate. The multiple first optical microstructures are arranged on the bottom face of the light guide plate and located in the first area of the bottom face. A first light-facing surface, facing the first light source, in each first optical microstructure is provided with a first edge connected with the bottom surface, and the perpendicular bisector of the first edge passes through the first light source. The plurality of second optical microstructures are arranged on the bottom surface of the light guide plate and located in the second area of the bottom surface. The first region does not overlap the second region. The second light facing face of each second optical microstructure is provided with a second edge connected with the bottom face, and the perpendicular bisector of the second edge does not pass through the first light source. The dynamic effect of the image presented by the light source module provided by the invention is better.

Description

Technical Field

[0001] The invention relates to a light source module, and in particular to a light source module with a display function. Background Art

[0002] With the advancement of lighting technology, in addition to general lamps that provide lighting functions, decorative lighting panels have also been developed to provide decorative effects. This type of decorative lighting panel forms an optical microstructure on the bottom surface of the light guide plate, and the position of each optical microstructure and the angle of its reflective surface are configured according to the effect that the decorative lighting panel needs to present. After the light emitted by the light source is incident from the side (light incident surface) of the light guide plate, it can be reflected by the optical microstructure and transmitted toward the light exit surface of the light guide plate and emit light, allowing users to see the pattern or text formed by the light on one side of the light exit surface of the light guide plate.

[0003] In recent years, in order to enhance the visual experience of viewers, the demand for using lighting panels to present more vivid images has gradually increased. In order to increase the dynamic effect of the image, the number of light sources can be increased or addressable or programmable light sources can be selected. However, in addition to increasing production costs, these methods also increase the driving circuit boards used in general lighting panel products and cannot be directly applied to such lighting panel products with dynamic effects.

[0004] The "background technology" section is only used to help understand the content of the present invention. Therefore, the content disclosed in the "background technology" section may contain some prior art that is not known to those skilled in the art. The content disclosed in the "background technology" section does not mean that the content or the problem to be solved by one or more embodiments of the present invention has been known or recognized by those skilled in the art before the application of the present invention. Summary of the invention

[0005] The present invention provides a light source module, which presents an image with better dynamic effect and has cost advantage.

[0006] To achieve one or part or all of the above purposes or other purposes, one embodiment of the present invention proposes 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 incident surface and a bottom surface connected to the first light incident surface. The first light source is arranged on one side of the first light incident surface of the light guide plate. A plurality of first optical microstructures are arranged on the bottom surface of the light guide plate and are located in a first area of ​​the bottom surface. These first optical microstructures each have a first light-facing surface arranged toward the first light source. The first light-facing surface has a first edge connected to the bottom surface, and the midpoint of the first edge passes through the first light source. A plurality of second optical microstructures are arranged on the bottom surface of the light guide plate and are located in a second area of ​​the bottom surface. The first area does not overlap with the second area. These second optical microstructures each have a second light-facing surface. The second light-facing surface has a second edge connected to the bottom surface, and the midpoint of the second edge does not pass through the first light source.

[0007] Based on the above, in a light source module of one embodiment of the present invention, a plurality of first optical microstructures are provided on the bottom surface of the light guide plate in the first area, and a plurality of second optical microstructures are provided in the second area. The perpendicular bisector of the first edge of the first light-facing surface of the first optical microstructure passes through the first light source, but the perpendicular bisector of the second edge of the second light-facing surface of the second optical microstructure does not pass through the first light source. With such a configuration, the main light-emitting direction of the light emitted by the first light source after reflection by the first optical microstructure is different from the main light-emitting direction after reflection by the second optical microstructure. Therefore, the relationship between the light-emitting brightness of the first area and the second area can change with different viewing angles, thereby presenting a dynamic effect of changing light-emitting distribution.

[0008] Although the present invention has been disclosed as above by the embodiments, it is not intended to limit the present invention. Any technician in the relevant field may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the content defined by the attached claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a front schematic view of a light source module according to a first embodiment of the present invention.

[0010] Figure 2A yes Figure 1 A side view schematic diagram of a light source module.

[0011] Figure 2B yes Figure 1 A cross-sectional schematic diagram of a light source module.

[0012] Figure 3 The light passes through Figure 1 Schematic diagram of the distribution of normalized brightness versus viewing angle after reflection of optical microstructures in different areas.

[0013] FIG. 4A to FIG. 4C yes Figure 1 Schematic diagram of images presented by the light source module in three viewing angle directions parallel to the light incident surface of the light guide plate.

[0014] Figure 5 is a front schematic view of a light source module according to a second embodiment of the present invention.

[0015] Fig. 6A yes Figure 5 A side view schematic diagram of a light source module.

[0016] Figure 6B yes Figure 5 A cross-sectional schematic diagram of a light source module.

[0017] 7A to 7C yes Figure 5 Schematic diagram of images presented by the light source module in three viewing angle directions parallel to a plane perpendicular to the light incident surface and the light emitting surface of the light guide plate.

[0018] Figure 8 is a front schematic view of a light source module according to a third embodiment of the present invention.

[0019] Fig. 9A yes Figure 8 A side view schematic diagram of a light source module.

[0020] Fig. 9B yes Figure 8 A cross-sectional schematic diagram of a light source module.

[0021] Fig.10 is a front schematic view of a light source module according to a fourth embodiment of the present invention.

[0022] Fig.11 is a front schematic view of a light source module according to a fifth embodiment of the present invention.

[0023] Fig.12 is a front schematic view of a light source module according to a sixth embodiment of the present invention.

[0024] Reference numerals list

[0025] 10, 10A, 10B, 10C, 10D, 10E: Light source module

[0026] 100, 100A, 100B, 100E: Light guide plate

[0027] 100bs: bottom surface

[0028] 100es, 121es, 122es: light-emitting surface

[0029] 100is1, 100is1-A: First light incident surface

[0030] 100is1a, 100is1b, 100is1c: sub-surface

[0031] 100is2: Second light incident surface

[0032] 121: The First Light Source

[0033] 122: Second light source

[0034] 123, 125, 123a, 125a, 123b, 125b: auxiliary light source

[0035] e1, e2, e3, e4, e5, e6: edge

[0036] GC1, GC2, GC3, GC4, GC5, GC6: Geometric Center

[0037] L1, L2, L3, L1”, L2”, L3”, L4, L5, L6: light

[0038] MED1, MED2, MED3, MED1-A, MED2-A, MED3-A, MED4, MED5, MED6: main light direction

[0039] MED1xz, MED2xz, MED3xz, MED1yz, MED2yz, MED3yz, MED4xz, MED5xz, MED6xz, MED4yz, MED5yz, MED6yz: orthographic projection

[0040] MS1, MS2, MS3, MS1-A, MS2-A, MS3-A, MS4, MS5, MS6: optical microstructures

[0041] PB1, PB2, PB3, PB4, PB5, PB6: perpendicular median

[0042] R1, R2, R3: resistors

[0043] rs1, rs2, rs3, rs1-A, rs2-A, rs3-A, rs4, rs5, rs6: light-facing side

[0044] S1, S2, S3: Spacing

[0045] β1, β2, β3, β4, β5, β6, θ1, θ2, θ3, θ4: angle

[0046] α1, α2, α3, α1”, α2”, α3”, α4, α5, α6: bottom angle

[0047] X, Y, Z: axis

[0048] Z1, Z2, Z3: Area. DETAILED DESCRIPTION

[0049] The above and other technical contents, features and effects of the present invention will be clearly presented in the detailed description of a preferred embodiment made with reference to the drawings below. The directional terms (e.g., up, down, left, right, front or back, etc.) mentioned in the following embodiments are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate rather than to limit the present invention.

[0050] Figure 1 is a front schematic view of a light source module according to a first embodiment of the present invention. Figure 2A yes Figure 1 A side view schematic diagram of a light source module. Figure 2B yes Figure 1 A cross-sectional schematic diagram of a light source module. Figure 3 The light passes through Figure 1 Schematic diagram of the distribution of normalized brightness versus viewing angle after reflection of optical microstructures in different areas. FIG. 4A to FIG. 4C yes Figure 1 Schematic diagram of images presented by the light source module in three viewing angle directions parallel to the light incident surface of the light guide plate.

[0051] Please refer to Figure 1 , Figure 2A and Figure 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 has a first light incident surface 100is1, a light emitting surface 100es and a bottom surface 100bs. The light emitting surface 100es and the bottom surface 100bs are opposite to each other and are both connected to the first light incident surface 100is1. The first light source 121 is disposed on one side of the first light incident surface 100is1 of the light guide plate 100. A plurality of optical microstructures are disposed on the bottom surface 100bs of the light guide plate 100.

[0052] For example, in this embodiment, the bottom surface 100bs of the light guide plate 100 may have a first area Z1, a second area Z2 and a third area Z3. A plurality of optical microstructures MS1 are disposed in the first area Z1. A plurality of optical microstructures MS2 are disposed in the second area Z2. A plurality of optical microstructures MS3 are disposed in the third area Z3.

[0053] It is particularly noted that these regions of the bottom surface 100bs do not overlap along the normal direction of the light emitting surface 100es (e.g., the axial direction of the Z axis), or in other words, these regions are each continuously distributed on the bottom surface 100bs. From another point of view, a single (or a few) optical microstructures MS1, MS2, and MS3 are not arranged in a staggered manner.

[0054] In the present embodiment, the plurality of optical microstructures MS1 located in the first area Z1 respectively have a plurality of light-facing surfaces rs1 facing the first light source 121. Each of these light-facing surfaces rs1 has an edge e1 connected to the bottom surface 100bs. The plurality of optical microstructures MS2 located in the second area Z2 respectively have a plurality of light-facing surfaces rs2. Each of these light-facing surfaces rs2 has an edge e2 connected to the bottom surface 100bs. The plurality of optical microstructures MS3 located in the third area Z3 respectively have a plurality of light-facing surfaces rs3. Each of these light-facing surfaces rs3 has an edge e3 connected to the bottom surface 100bs. Specifically, in the present embodiment, each of the above-mentioned optical microstructures is, for example, a concave triangular prism-shaped structure.

[0055] It is particularly noted that the perpendicular bisector PB1 of the edge e1 passes through the first light source 121 (for example, the orthographic projection of the perpendicular bisector PB1 on the virtual extension surface of the bottom surface 100bs passes through the orthographic projection area of ​​the first light source 121 on the virtual extension surface of the bottom surface 100bs. In the present invention, similar contents are all in accordance with the above description and are not repeated here), but the perpendicular bisector PB2 of the edge e2 and the perpendicular bisector PB3 of the edge e3 do not pass through the first light source 121. More specifically, in the present embodiment, the perpendicular bisector PB2 of the edge e2 of the light-facing surface rs2 of each of the plurality of optical microstructures MS2 passes through the same side of the first light source 121 (for example Figure 1 The upper side of the first light source 121 in the middle, but not limited thereto), and the perpendicular bisector PB3 of the edge e3 of the light-facing surface rs3 of each of the plurality of optical microstructures MS3 passes through the same other side of the first light source 121 (eg Figure 1 The lower side of the first light source 121 is preferably located in the middle, but not limited thereto).

[0056] For example, in the present embodiment, the perpendicular bisector PB1 of the edge e1 of the light-facing surface rs1 of each optical microstructure MS1 will pass through the light-emitting surface 121es of the first light source 121, for example, will substantially pass through the geometric center GC1 of the light-emitting surface 121es (for example, the perpendicular bisector PB1 and the light-emitting surface 121es have an intersection, and the offset of the intersection relative to the geometric center GC1 is not greater than 5% of the width of the light-emitting surface 121es in the Y direction). In other words, 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 orthographic projection area of ​​the optical microstructure MS2 on the bottom surface 100bs) and the geometric center GC1 of the first light source 121 have a virtual connecting line, and the perpendicular bisector PB2 of the edge e2 of the light-facing surface rs2 of each optical microstructure MS2 will deflect by an angle θ1 clockwise relative to the virtual connecting line, and the deflection angle θ1 will vary with the relative position 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 connection line, and the perpendicular bisector PB3 of the edge e3 of the light-facing surface rs3 of each optical microstructure MS3 is deflected counterclockwise by an angle θ2 relative to the virtual connection line, and the deflection angle θ2 varies with the relative positions of the optical microstructure MS3 and the first light source 121. The clockwise or counterclockwise deflection mentioned here is, for example, the rotation of the optical microstructure according to a rotation axis (not shown) passing through its own geometric center and parallel to the Z axis. In one embodiment, the intersection point of the perpendicular bisector PB2 of each optical microstructure MS2 and the extended plane 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 from the geometric center GC1 of the first light source 121 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, and the intersection point of the perpendicular bisector PB3 of each optical microstructure MS3 and the extended plane of the light emitting surface 121es of the first light source 121 is located on the other side of the first light source 121, and the distance from the geometric center GC1 of the first light source 121 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.

[0057] On the other hand, there is a base angle α1 (shown in FIG. 1 ) between the light-facing surface rs1 of the optical microstructure MS1 and the virtual extension surface of the bottom surface 100bs. Figure 2B ). A bottom angle α2 is formed between the light-facing surface rs2 of the optical microstructure MS2 and the virtual extension surface of the bottom surface 100bs. A bottom angle α3 is formed between the light-facing surface rs3 of the optical microstructure MS3 and the virtual extension surface of the bottom surface 100bs. In this embodiment, the bottom angle α1 of the optical microstructure MS1, the bottom angle α2 of the optical microstructure MS2, and the bottom angle α3 of the optical microstructure MS3 are, for example, the same.

[0058] In the present embodiment, the first light source 121 is suitable for emitting a first light L1, a second light L2 and a third light L3 towards 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 emitting direction MED1 after being reflected by the plurality of optical microstructures MS1. The second light L2 has a second main light emitting direction MED3 after being reflected by the plurality of optical microstructures MS2. The third light L3 has a third main light emitting direction MED3 after being reflected by the plurality of optical microstructures MS3.

[0059] It is particularly noteworthy that the first main light emitting direction MED1 of the first light L1 reflected by the optical microstructure MS1, the second main light emitting direction MED2 of the second light L2 reflected by the optical microstructure MS2, and the third main light emitting direction MED3 of the third light L3 reflected by the optical microstructure MS3 are different from each other.

[0060] Further, in this embodiment, the first main light emitting direction MED1 may be parallel to the Z axis, or perpendicular to the X axis and the Y axis, wherein the X axis, the Y axis and the Z axis are perpendicular to each other. That is, the first main light emitting direction MED1 is perpendicular to the light emitting surface 100es of the light guide plate 100 or the XY plane formed by the X axis and the Y axis.

[0061] However, the second main light emitting direction MED2 and the third main light emitting direction MED3 are not parallel to the Z axis. More specifically, the orthographic projection MED2yz of the second main light emitting 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 Y axis (e.g., Figure 2A As shown), the orthographic projection MED3yz of the third main light emitting direction MED3 on the YZ plane has a component opposite to the Y-axis axial direction (as shown Figure 2A shown).

[0062] From another point of view, an angle β1 is formed between an orthographic projection MED2yz of the second main light emitting direction MED2 on the YZ plane and an orthographic projection MED1yz of the first main light emitting direction MED1 on the YZ plane, and an angle β2 is formed between an orthographic projection MED3yz of the third main light emitting direction MED3 on the YZ plane and an orthographic projection MED1yz of the first main light emitting direction MED1 on the YZ plane. In the present embodiment, the orthographic projections MED2yz and MED3yz of the second main light emitting direction MED2 and the third main light emitting direction MED3 on the YZ plane may be located on opposite sides of the orthographic projection MED1yz of the first main light emitting direction MED1 on the YZ plane, respectively, and the angles β1 and β2 may be selectively the same, but are not limited thereto.

[0063] It is 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 of the present embodiment are all the same, the first main light emitting direction MED1, the second main light emitting direction MED2 and the third main light emitting 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 orthographic projections MED1xz, MED2xz and MED3xz of the first main light emitting direction MED1, the second main light emitting direction MED2 and the third main light emitting direction MED3 on the XZ plane (i.e., the plane formed by the X-axis and the Z-axis) respectively do not have a component in the same direction or opposite direction to the X-axis.

[0064] That is to say, in this embodiment, the first main light emitting direction MED1 , the second main light emitting direction MED2 and the third main light emitting direction MED3 are not parallel to each other in the dimension of the YZ plane, but are parallel to each other in the dimension of the XZ plane.

[0065] In the dimension of the YZ plane, the normalized brightness distribution curves of the first light L1 reflected by the optical microstructure MS1 of the first area Z1, the second light L2 reflected by the optical microstructure MS2 of the second area Z2, and the third light L3 reflected by the optical microstructure MS3 of the third area Z3 are as follows: Figure 3 As shown. Figure 3 It can be seen that in this embodiment, the first main light emitting direction MED1 of the first light ray L1 is, for example, the direction of a viewing angle of 0 degrees, the second main light emitting direction MED2 of the second light ray L2 is, for example, the direction of a viewing angle of -10 degrees, and the third main light emitting direction MED3 of the third light ray L3 is, for example, the direction of a viewing angle of +10 degrees.

[0066] It is particularly noteworthy that in the first main light emitting direction MED1 (for example, viewed from the direction of a viewing angle of 0 degrees), the light emitting brightness of the first area Z1 is significantly higher than the light emitting brightness of the second area Z2 and the light emitting brightness of the third area Z3, and the light emitting brightness of the second area Z2 is equivalent to the light emitting brightness of the third area Z3. In the second main light emitting direction MED2, the light emitting brightness of the second area Z2 is significantly higher than the light emitting brightness of the first area Z1 and the light emitting brightness of the third area Z3, and the light emitting brightness of the first area Z1 is higher than the light emitting brightness of the third area Z3. In the third main light emitting direction MED3, the light emitting brightness of the third area Z3 is significantly higher than the light emitting brightness of the first area Z1 and the light emitting brightness of the second area Z2, and the light emitting brightness of the first area Z1 is higher than the light emitting brightness of the second area Z2. In this way, when the user views the light guide plate 100 in different directions, different brightness changes in different areas can be observed.

[0067] Please refer to FIG. 4A to FIG. 4CIn this embodiment, the light guide plate 100 is, for example, a lighting panel, and the orthographic projections of the first area Z1, the second area Z2, and the third area Z3 having different optical microstructures on the light emitting surface 100es can form a decorative pattern, for example Figure 4A The pattern shown is a house pattern (the content of the pattern is not particularly limited in the present invention), and the first area Z1, the second area Z2 and the third area Z3 are different areas (such as walls or roofs) that constitute the house pattern. It should be 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 glittering effect, so the size of each area is relatively large. For example, the length of the first area Z1 (the second area Z2) is at least 1 / 10 of the length of the light guide plate 100, and the width of the first area Z1 (the second area Z2) is at least 1 / 10 of the width of the light guide plate 100. Figure 4A As shown, when the user is viewing the image at a -10 degree angle in the YZ plane (e.g. Figure 4A When the light guide plate 100 is viewed from an upper viewing angle along the YZ plane, the brightness of the second area Z2 will be higher than the brightness of the light emitted from the first area Z1 and the third area Z3, and the brightness of the light emitted from the first area Z1 will be higher than the brightness of the light emitted from the third area Z3.

[0068] like Figure 4B As shown, when the user is viewing the image with a 0 degree viewing angle (e.g. Figure 4A When the light guide plate 100 is viewed from the main viewing angle along the YZ plane, the brightness of the first area Z1 is higher than the brightness of the light emitted from the second area Z2 and the third area Z3, and the brightness of the light emitted from the second area Z2 is equivalent to that of the light emitted from the third area Z3.

[0069] like Figure 4C As shown, when the user is viewing the image at a +10 degree angle in the YZ plane (e.g. Figure 4A When the light guide plate 100 is viewed from a lower perspective along the YZ plane, the brightness of the third area Z3 will be higher than the brightness of the light emitted from the second area Z2 and the first area Z1, and the brightness of the light emitted from the first area Z1 will be higher than the brightness of the light emitted from the second area Z2.

[0070] That is to say, when the user views the decorative pattern formed by 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 brightness distribution of the decorative pattern will be different as the viewing angle changes, thereby generating a dynamic effect of light and shadow changes. On the other hand, since the light source module 10 of the present embodiment achieves the dynamic effect of light distribution by configuring the optical microstructures in different ways in different areas of the light guide plate 100, the flat pattern can produce a similar three-dimensional visual effect when the user moves and views. Compared with the current method of increasing the number of light sources or selecting an addressable light source, the light source module 10 can also have a lower production cost.

[0071] Some other embodiments will be listed below to illustrate the present disclosure in detail, wherein the same components will be marked with the same symbols, and the description of the same technical content will be omitted. For the omitted parts, please refer to the aforementioned embodiments, which will not be repeated below.

[0072] Figure 5 is a front schematic view of a light source module according to a second embodiment of the present invention. Fig. 6A yes Figure 5 A side view schematic diagram of a light source module. Figure 6B yes Figure 5 A cross-sectional schematic diagram of a light source module. 7A to 7C yes Figure 5 Schematic diagram of images presented by the light source module in three viewing angle directions parallel to a plane perpendicular to the light incident surface and the light emitting surface of the light guide plate.

[0073] Please refer to Figure 5 , Fig. 6A and Figure 6B , different from Figure 1 As for the light guide plate 100 of FIG. 2 , in the light source module 10A of the present embodiment, the bottom angle α1” of the light-facing surface rs1-A of the optical microstructure MS1-A of the light guide plate 100A may be selectively larger than the bottom angle α3” of the light-facing surface rs3-A of the optical microstructure MS3-A, and may be selectively smaller than the bottom angle α2” of the light-facing surface rs2-A of the optical microstructure MS2-A. In other embodiments, the angular relationship among the bottom angle α1”, the bottom angle α2” and the bottom angle α3” may also be adjusted according to actual conditions.

[0074] That is to say, the optical microstructures MS1-A, MS2-A and MS3-A of this embodiment have different bottom angles. Therefore, the first light L1", the second light L2" and the third light L3" reflected by these optical microstructures are not parallel to each other in the XZ plane.

[0075] For example, in the present embodiment, the orthographic projection MED1xz of the first main light emitting direction MED1-A of the first light ray L1″ on the XZ plane is parallel to the Z axis, while the orthographic projection MED2xz of the second main light emitting direction MED2-A of the second light ray L2″ on the XZ plane and the orthographic projection MED3xz of the third main light emitting direction MED3-A of the third light ray L3″ on the XZ plane are not parallel to the Z axis. More specifically, the orthographic projection MED2xz of the second main light emitting direction MED2-A on the XZ plane has a component that is opposite to the axial direction of the X axis (e.g., Figure 6B As shown), the orthographic projection MED3xz of the third main light emitting direction MED3-A on the XZ plane has a component in the same direction as the X-axis (as shown Figure 6B shown).

[0076] From another point of view, there is an angle β3 between the orthographic projection MED2xz of the second main light emitting direction MED2-A on the XZ plane and the orthographic projection MED1xz of the first main light emitting direction MED1-A on the XZ plane, and there is an angle β4 between the orthographic projection MED3xz of the third main light emitting direction MED3-A on the XZ plane and the orthographic projection MED1xz of the first main light emitting direction MED1-A on the XZ plane. In the present embodiment, the orthographic projection MED2xz and the orthographic projection MED3xz of the second main light emitting direction MED2-A and the third main light emitting direction MED3-A on the XZ plane may be respectively located on opposite sides of the orthographic projection MED1xz of the first main light emitting direction MED1-A on the XZ plane, and the angle β3 and the angle β4 may be selectively the same, but are not limited thereto.

[0077] Since the configuration relationship between the optical microstructure MS1-A, the optical microstructure MS2-A and the optical microstructure MS3-A of the present embodiment and the first light source 121 is similar to Figure 1 The configuration relationship between the optical microstructure MS1, the optical microstructure MS2 and the optical microstructure MS3 and the first light source 121 is described in detail in the relevant paragraphs of the aforementioned embodiment, which will not be repeated here.

[0078] Based on the above configuration, in the light source module 10A of the present embodiment, the first main light emitting direction MED1-A, the second main light emitting direction MED2-A and the third main light emitting direction MED3-A are not parallel to each other in the dimension of the YZ plane, nor are they parallel to each other in the dimension of the XZ plane. Specifically, Figure 5 In the schematic diagram presented, the first main light emitting direction MED1-A is emitted in the forward direction, the second main light emitting direction MED2-A is emitted in the upper left direction, and the third main light emitting direction MED3-A is emitted in the lower right direction.

[0079] It is particularly noted that in the present embodiment, the bottom angle α1″ of each optical microstructure MS1-A is the same, the bottom angle α2″ of each optical microstructure MS2-A is the same, and the bottom angle α3″ of each optical microstructure MS3-A is the same, but the present invention is not limited to this. In other embodiments, the bottom angle α1″ of each optical microstructure MS1-A may be gradually changed, the bottom angle α2″ of each optical microstructure MS2-A may be gradually changed, and the bottom angle α3″ of each optical microstructure MS3-A may also be gradually changed, so that the brightness in each area can also have a slight change 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 bottom angle α1" of the optical microstructures MS1-A of each microstructure group is the same, but the bottom angle α1" of the optical microstructures MS1-A of different microstructure groups is different. In this way, the brightness of the light emitting areas corresponding to each microstructure group can be different in the dimension of the XZ plane.

[0080] In this embodiment, when the user moves the Fig. 7A When viewing the light guide plate 100A from the left side perspective, the brightness of the second area Z2 will be higher than the brightness of the light emitted from the first area Z1 and the third area Z3, and the brightness of the light emitted from the first area Z1 will be higher than the brightness of the light emitted from the third area Z3.

[0081] When the user moves in the XZ plane Figure 7B When the light guide plate 100A is viewed from the main viewing angle in FIG, the brightness of the first area Z1 is higher than the brightness of the light emitted from the second area Z2 and the third area Z3, and the brightness of the light emitted from the second area Z2 is equivalent to the brightness of the light emitted from the third area Z3.

[0082] When the user moves in the XZ plane Figure 7C When viewing the light guide plate 100A from the right side viewing angle, the brightness of the third area Z3 will be higher than the brightness of the light emitted from the second area Z2 and the first area Z1, and the brightness of the light emitted from the first area Z1 will be higher than the brightness of the light emitted from the second area Z2.

[0083] Since the brightness distribution of the light guide plate 100A of this embodiment when viewed at different viewing angles in the YZ plane is similar to FIG. 4A to FIG. 4C For the light guide plate 100, please refer to the relevant paragraphs of the aforementioned embodiment for detailed description, which will not be repeated here.

[0084] In this embodiment, when the user views the decorative pattern formed by 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 brightness distribution of the decorative pattern will be different as the viewing angle changes, thereby generating a dynamic effect of light and shadow changes. On the other hand, since the light source module 10A of this embodiment achieves the dynamic effect of light distribution by configuring optical microstructures in different ways in different areas of the light guide plate 100A, compared with the current method of increasing the number of light sources configured or selecting addressable light sources, the light source module 10A can also have a lower production cost.

[0085] Figure 8 is a front schematic view of a light source module according to a third embodiment of the present invention. Fig. 9A yes Figure 8 A side view schematic diagram of a light source module. Fig. 9B yes Figure 8 Please refer to the cross-sectional view of the light source module. Figure 8 , Fig. 9A and Fig. 9B The light source module 10B of this embodiment is Figure 1 The difference between the light source modules 10 is that the number of light sources and the number of optical microstructures are different.

[0086] Specifically, in the present 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 incident surface 100is2 of the light guide plate 100B. The second light incident surface 100is2 connects the bottom surface 100bs and the first light incident surface 100is1. A plurality of optical microstructures MS4 (i.e., the third optical microstructure) are disposed on the bottom surface 100bs of the light guide plate 100B and are located in the first area Z1. A plurality of optical microstructures MS5 (i.e., the fourth optical microstructure) are disposed on the bottom surface 100bs of the light guide plate 100B and are located in the second area Z2. A plurality of optical microstructures MS6 are disposed on the bottom surface 100bs of the light guide plate 100B and are located in the third area Z3.

[0087] In this embodiment, the plurality of optical microstructures MS4 located in the first area Z1 respectively have a plurality of light-facing surfaces rs4 facing the second light source 122. Each of these light-facing surfaces rs4 has an edge e4 connected to the bottom surface 100bs. The plurality of optical microstructures MS5 located in the second area Z2 respectively have a plurality of light-facing surfaces rs5. Each of these light-facing surfaces rs5 has an edge e5 connected to the bottom surface 100bs. The plurality of optical microstructures MS6 located in the third area Z3 respectively have a plurality of light-facing surfaces rs6. Each of these light-facing surfaces rs6 has an edge e6 connected to the bottom surface 100bs.

[0088] It is particularly noted that the perpendicular bisector PB4 of the edge e4 passes through the second light source 122 (for example, the orthographic projection of the perpendicular bisector PB4 on the virtual extension surface of the bottom surface 100bs passes through the orthographic projection area of ​​the second light source 122 on the virtual extension surface of the bottom surface 100bs), but the perpendicular bisector PB5 of the edge e5 and the perpendicular bisector PB6 of the edge e6 do not pass through the second light source 122. More specifically, in this embodiment, the perpendicular bisector PB5 of the edge e5 of the light-facing surface rs5 of each of the plurality of optical microstructures MS5 passes through the same side of the second light source 122 (for example, Figure 8 The left side of the second light source 122 in the middle, but not limited thereto), and the perpendicular bisector PB6 of the edge e6 of the light-facing surface rs6 of each of the plurality of optical microstructures MS6 passes through the same other side of the second light source 122 (eg Figure 8 The right side of the second light source 122 is shown in FIG. 1 , but is not limited thereto).

[0089] For example, in the present embodiment, the perpendicular bisector PB4 of the edge e4 of the light-facing surface rs4 of each optical microstructure MS4 will pass through the light-emitting surface 122es of the second light source 122, such as through the geometric center GC4 of the light-emitting surface 122es. In other words, the edge e4 of each optical microstructure MS4 is not necessarily parallel. On the other hand, the geometric center GC5 of the optical microstructure MS5 (such as the geometric center of the orthographic projection area of ​​the optical microstructure MS5 on the bottom surface 100bs) and the geometric center GC4 of the second light source 122 have a virtual connecting line, and the perpendicular bisector PB5 of the edge e5 of the light-facing surface rs5 of each optical microstructure MS5 will deflect by an angle θ3 clockwise relative to the virtual connecting line, and the deflection angle θ3 will vary with the relative position 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 connection line, and the perpendicular bisector PB6 of the edge e6 of the light-facing surface rs6 of each optical microstructure MS6 is counterclockwise deflected by an angle θ4 relative to the virtual connection line, and the deflection angle θ4 varies with the relative positions of the optical microstructure MS6 and the second light source 122. The clockwise deflection or counterclockwise deflection mentioned here is, for example, the rotation of the optical microstructure according to a rotation axis (not shown) passing through its own geometric center and parallel to the Z axis.

[0090] On the other hand, a bottom angle α4 is formed between the light-facing surface rs4 of the optical microstructure MS4 and the virtual extension surface of the bottom surface 100bs. A bottom angle α5 is formed between the light-facing surface rs5 of the optical microstructure MS5 and the virtual extension surface of the bottom surface 100bs. A bottom angle α6 is formed between the light-facing surface rs6 of the optical microstructure MS6 and the virtual extension surface of the bottom surface 100bs. In the present embodiment, the bottom angle α4 of the optical microstructure MS4, the bottom angle α5 of the optical microstructure MS5, and the bottom angle α6 of the optical microstructure MS6 are, for example, the same.

[0091] In the present embodiment, the second light source 122 is suitable for emitting a fourth light L4, a fifth light L5 and a sixth light L6 towards 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 emitting direction MED4 after being reflected by the plurality of optical microstructures MS4. The fifth light L5 has a fifth main light emitting direction MED5 after being reflected by the plurality of optical microstructures MS5. The sixth light L6 has a sixth main light emitting direction MED6 after being reflected by the plurality of optical microstructures MS6.

[0092] It is particularly noteworthy that the fourth main light emitting direction MED4 of the fourth light ray L4 reflected by the optical microstructure MS4, the fifth main light emitting direction MED5 of the fifth light ray L5 reflected by the optical microstructure MS5, and the sixth main light emitting direction MED6 of the sixth light ray L6 reflected by the optical microstructure MS6 are different from each other.

[0093] Further, in the present embodiment, the fourth main light emitting direction MED4 may be parallel to the Z axis. That is, the first main light emitting direction MED1 is perpendicular to the light emitting surface 100es or the XY plane of the light guide plate 100. However, the fifth main light emitting direction MED5 and the sixth main light emitting direction MED6 are not parallel to the Z axis. More specifically, the orthographic projection MED5xz of the fifth main light emitting direction MED5 on the XZ plane has a component in the opposite direction to the axial direction of the X axis, and the orthographic projection MED6xz of the sixth main light emitting direction MED6 on the XZ plane has a component in the same direction as the axial direction of the X axis.

[0094] From another point of view, an angle β5 is formed between the orthographic projection MED5xz of the fifth main light emitting direction MED5 on the XZ plane and the orthographic projection MED4xz of the fourth main light emitting direction MED4 on the XZ plane, and an angle β6 is formed between the orthographic projection MED6xz of the sixth main light emitting direction MED6 on the XZ plane and the orthographic projection MED4xz of the fourth main light emitting direction MED4 on the XZ plane. In the present embodiment, the orthographic projection MED5xz and the orthographic projection MED6xz of the fifth main light emitting direction MED5 and the sixth main light emitting direction MED6 on the XZ plane may be respectively located on opposite sides of the orthographic projection MED4xz of the fourth main light emitting direction MED4 on the XZ plane, and the angle β5 and the angle β6 may be selectively the same, but are not limited thereto.

[0095] It is 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 of the present embodiment are all the same, the fourth main light emitting direction MED4, the fifth main light emitting direction MED5 and the sixth main light emitting 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 orthographic projections MED4yz, MED5yz and MED6yz of the fourth main light emitting direction MED4, the fifth main light emitting direction MED5 and the sixth main light emitting direction MED6 on the YZ plane, respectively, do not have components in the same direction or opposite direction to the Y-axis.

[0096] That is to say, in this embodiment, the fourth main light emitting direction MED4, the fifth main light emitting direction MED5 and the sixth main light emitting direction MED6 are not parallel to each other in the dimension of the XZ plane, but are parallel to each other in the dimension of the YZ plane.

[0097] Since the configuration relationship between the optical microstructures MS1, MS2 and MS3 of the present embodiment and the first light source 121 is similar to Figure 1 The configuration relationship between the optical microstructure MS1, the optical microstructure MS2 and the optical microstructure MS3 and the first light source 121 is described in detail in the relevant paragraphs of the aforementioned embodiment, which will not be repeated here.

[0098] In particular, Figures 5 to 6B The light source module 10A realizes the dynamic effect of light distribution in the dimension of the XZ plane by using the different bottom angles of the optical microstructure (such as 7A to 7C However, in this embodiment, the light source module 10B realizes the dynamic effect of light distribution in the dimension of the XZ plane by adding a second set of light sources and optical microstructures.

[0099] Fig.10 is a schematic front view of a light source module according to a fourth embodiment of the present invention. Fig.10 The light source module 10C of this embodiment is Figure 1The difference between the light source modules 10 and the light source modules 10C is that the number of light sources is different. For example, in the present embodiment, the light source module 10C further includes an auxiliary light source 123 and an auxiliary light source 125, which are arranged on one side of the first light incident surface 100is1 of the light guide plate 100 and are respectively 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 arranged in sequence along the Y direction (the Y direction is, for example, parallel to the first light incident surface 100is1 and parallel to the light emitting surface 100es). 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, in the range of 2 to 10 times the width of the light emitting surface 121es of the first light source 121 in the Y direction, 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, in the range of 2 to 10 times the width of the light emitting surface 121es of the first light source 121 in the Y direction.

[0100] It is particularly noted that the brightness of the light emitted by the auxiliary light source 123, the auxiliary light source 125 and the first light source 121 is not the same. For example, in the present embodiment, the brightness of the light emitted by the auxiliary light source 123 may be less than the brightness of the light emitted by the first light source 121, and greater than the brightness of the light emitted by the auxiliary light source 125, but it is not limited thereto. Accordingly, the dynamic effect of the light and shadow changes between different areas on the light guide plate 100 can be further enhanced. Preferably, the percentage value of the brightness of the light emitted by the auxiliary light source 123 and the auxiliary light source 125 to the brightness of the light emitted by the first light source 121 can be less than 60%.

[0101] However, the present invention is not limited thereto. The light color of at least one of the auxiliary light source 123 and the auxiliary light source 125 may also be different from the light color of the first light source 121. Accordingly, the dynamic effect of the color of different areas on the light guide plate 100 changing with the viewing angle can be increased. Figure 8 In the light source module 10B, the light colors of the first light source 121 and the second light source 122 may also be selected to be different, so as to further increase the dynamic effect of the colors of different areas on the light guide plate 100B changing with the viewing angle.

[0102] Fig.11 is a schematic front view of a light source module according to a fifth embodiment of the present invention. Fig.11 The light source module 10D of this embodiment is Fig.10 Specifically, in this embodiment, the first light source 121, the auxiliary light source 123a and the auxiliary light source 125a are respectively connected in series with a first resistor R1, a second resistor R2 and a third resistor R3, and the resistance values ​​of these resistors are different from each other.

[0103] By connecting multiple resistors with different resistance values ​​in series, the selection flexibility of the first light source 121, the auxiliary light source 123a and the auxiliary light source 125a can be increased. For example, multiple light-emitting elements with the same maximum light output brightness can be used, and then the light output brightness of each of these light-emitting elements can be controlled by connecting resistors with different resistance values ​​in series. Accordingly, the dynamic effect of light and shadow changes between different areas on the light guide plate 100 can be further enhanced.

[0104] Fig.12 is a front view schematic diagram of a light source module according to a sixth embodiment of the present invention. Fig.12 The light source module 10E of this embodiment is Fig.10 The difference between the light source module 10C and the light source module 10E is that the configuration of the light guide plate is different. For example, in the present embodiment, the first light incident 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 arranged corresponding to the first sub-surface 100is1a. The auxiliary light source 123b is arranged corresponding to the second sub-surface 100is1b. The auxiliary light source 125b is arranged corresponding to the third sub-surface 100is1c.

[0105] The first light source 121 and the first sub-surface 100is1a have a first spacing S1 along the direction X, the auxiliary light source 123b and the second sub-surface 100is1b have a second spacing S2 along the direction X, and the auxiliary light source 125b and the third sub-surface 100is1c have a third spacing S3 along the direction X. It should be noted that in this embodiment, the second spacing S2 is greater than the first spacing S1 and less than the third spacing S3. That is, the first spacing S1, the second spacing S2 and the third spacing S3 are different from each other. For example, the second spacing S2 is 2 to 4 times the first spacing S1, and the third spacing S3 is 3 to 6 times the first spacing S1.

[0106] Since the light 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 brightness of the light emitted by the auxiliary light source 123b and coupled to the light guide plate 100E will be lower than the brightness of the light emitted by the first light source 121 and coupled to the light guide plate 100E, but will be higher than the brightness of the light emitted by the auxiliary light source 125b and coupled to the light guide plate 100E. Accordingly, the dynamic effect of light and shadow changes between different areas on the light guide plate 100E can be further enhanced.

[0107] In summary, in a light source module of one embodiment of the present invention, a plurality of first optical microstructures are provided on the bottom surface of the light guide plate in the first area, and a plurality of second optical microstructures are provided in the second area. The perpendicular bisector of the first edge of the first light-facing surface of the first optical microstructure passes through the first light source, but the perpendicular bisector of the second edge of the second light-facing surface of the second optical microstructure does not pass through the first light source. With such a configuration, the main light-emitting direction of the light emitted by the first light source after reflection by the first optical microstructure is different from the main light-emitting direction after reflection by the second optical microstructure. Therefore, the relationship between the light-emitting brightness of the first area and the second area can change with different viewing angles, thereby presenting a dynamic effect of changing light-emitting distribution.

[0108] Although the present invention has been disclosed as above by the embodiments, it is not intended to limit the present invention. Any technician in the relevant field may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the contents defined in the attached claims.

Claims

1. A light source module, characterized in that: 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, wherein: 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 arranged on one side of the first light incident surface of the light guide plate; The plurality of first optical microstructures are arranged on the bottom surface of the light guide plate and are located in a first region of the bottom surface, the plurality of first optical microstructures each have a first light-facing surface arranged toward the first light source, and the plurality of first light-facing surfaces of the plurality of first optical microstructures each have a first edge connected to the bottom surface, and a perpendicular bisector of the first edge passes through the first light source; The multiple second optical microstructures are arranged on the bottom surface of the light guide plate and are located in the second area of ​​the bottom surface, the first area does not overlap with the second area, the multiple second optical microstructures each have a second light-facing surface, and the multiple second light-facing surfaces of the multiple second optical microstructures each have a second edge connected to the bottom surface, and the bisector of the second edge does not pass through the first light source.

2. The light source module according to claim 1, characterized in that: The first light source is suitable for emitting a first light ray toward each of the plurality of first optical microstructures, and the plurality of first light rays have a first main light emitting direction after being respectively reflected by the plurality of first optical microstructures. The first light source is also suitable for emitting a second light ray toward each of the plurality of second optical microstructures, and the plurality of second light rays have a second main light emitting direction after being respectively reflected by the plurality of second optical microstructures, and the first main light emitting direction is different from the second main light emitting direction.

3. The light source module according to claim 2, characterized in that: The first main light emitting direction and the second main light emitting direction are parallel to the first light incident surface of the light guide plate.

4. The light source module according to claim 2, characterized in that: The light guide plate further comprises a light emitting surface which is opposite to the bottom surface and connected to the first light incident surface, and the first main light emitting direction is perpendicular to the light emitting surface of the light guide plate.

5. The light source module according to claim 2, characterized in that: The perpendicular bisectors of the second edges of the plurality of second light-facing surfaces respectively pass through the same side of the first light source.

6. The light source module according to claim 2, characterized in that: The first light-facing surfaces of the plurality of first optical microstructures each have a first bottom angle with the virtual extension surface of the bottom surface, and the second light-facing surfaces of the plurality of second optical microstructures each have a second bottom angle with the virtual extension surface of the bottom surface, and the first bottom angle is different from the second bottom angle.

7. The light source module according to claim 1, characterized in that: The light source module further includes an auxiliary light source, which is disposed on one side of the first light incident surface of the light guide plate, wherein the first light source and the auxiliary light source have different light output brightness.

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

9. The light source module according to claim 1, characterized in that: The light source module also includes an auxiliary light source, which is arranged on one side of the first light incident surface of the light guide plate, wherein 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 arranged corresponding to the first sub-surface, the auxiliary light source is arranged corresponding to the second sub-surface, the first light source and the first sub-surface have a first distance, the auxiliary light source and the second sub-surface have a second distance, and the first distance is different from the second distance.

10. The light source module according to claim 1, characterized in that: The light source module further includes an auxiliary light source, which is disposed on one side of the first light incident surface of the light guide plate, wherein the first light source and the auxiliary light source have different light emission colors.

11. The light source module according to claim 1, characterized in that: The light source module further includes a second light source and a plurality of third optical microstructures, wherein: The second light source is arranged on one side of the second light incident surface of the light guide plate, and the second light incident surface connects the bottom surface and the first light incident surface; The multiple third optical microstructures are arranged on the bottom surface of the light guide plate and are located within the first area of ​​the bottom surface. The multiple third optical microstructures each have a third light-facing surface arranged toward the second light source. The multiple third light-facing surfaces of the multiple third optical microstructures each have a third edge connected to the bottom surface, and a perpendicular bisector of the third edge passes through the second light source.

12. The light source module according to claim 11, characterized in that: The light source module also includes a plurality of fourth optical microstructures, which are arranged on the bottom surface of the light guide plate and located within the second area of ​​the bottom surface. The plurality of fourth optical microstructures each have a fourth light-facing surface, and the plurality of fourth light-facing surfaces of the plurality of fourth optical microstructures each have a fourth edge connected to the bottom surface, and a perpendicular bisector of the fourth edge does not pass through the second light source.

13. The light source module according to claim 1, characterized in that: The light source module further includes a second light source, a plurality of third optical microstructures and a plurality of fourth optical microstructures, wherein: The second light source is arranged on one side of the second light incident surface of the light guide plate, and the second light incident surface connects the bottom surface and the first light incident surface; The plurality of third optical microstructures are arranged on the bottom surface of the light guide plate and are located in the first region of the bottom surface, the plurality of third optical microstructures each have a third light-facing surface arranged toward the second light source, and the third light-facing surfaces of the plurality of third optical microstructures each have a first bottom angle with a virtual extension surface of the bottom surface; The multiple fourth optical microstructures are arranged on the bottom surface of the light guide plate and are located in the second area of ​​the bottom surface. The multiple fourth optical microstructures each have a fourth light-facing surface arranged toward the second light source. The fourth light-facing surfaces of the multiple fourth optical microstructures each have a second bottom angle with the virtual extension surface of the bottom surface, wherein the first bottom angle is different from the second bottom angle.

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