Microstructured lens

Abstract

The invention discloses a microstructure lens. The microstructure lens comprises a lens main body and a plurality of microstructures, the lens body has a bottom surface and an arcuate surface. The plurality of microstructures are configured on the arc-shaped surface of the lens main body, each microstructure is provided with a circular outer edge, the circle centers of the plurality of circular outer edges of the plurality of microstructures are located at the same position when viewed from the upper part of the lens main body, and the plurality of circular outer edges are arranged at equal intervals.

Description

Technical Field

[0001] This invention relates to a lens, and more particularly to a lens having multiple microstructures. Background Technology

[0002] Monitors are widely used. With the increasing demand for high brightness and high contrast in monitors, direct-lit backlight modules have gradually become the mainstream choice for types of monitors requiring backlight modules, such as LCD monitors. In direct-lit backlight modules for LCD monitors, the light-emitting diode (LED) chips used are mostly of bare-die design, and diffusers and prisms are usually placed above these arrayed LED chips. The diffuser has a uniform light-distributing effect on the light emitted by the LED chips, while the prism has a focusing effect. The combination of diffuser and prism often results in maximum light intensity in the normal direction of the LCD monitor, leading to uneven overall illumination. Generally, shortening the spacing between LED chips and using a high-haze diffuser are necessary to improve this problem. However, shortening the spacing increases the number of LED chips used in the direct-lit backlight module, which in turn increases the manufacturing cost. Therefore, how to improve the overall illuminance uniformity with a limited number of light-emitting diodes will be a challenge for designers in this field. Summary of the Invention

[0003] An embodiment of the present invention provides a microstructure lens having good light amplification efficiency.

[0004] In one embodiment of the present invention, the microstructure lens includes a lens body and a plurality of microstructures. The lens body has a bottom surface and an arcuate surface. The plurality of microstructures are disposed on the arcuate surface of the lens body, wherein each microstructure has a circular outer edge. Viewed from above the lens body, the centers of the multiple circular outer edges of the multiple microstructures fall at the same position, and the multiple circular outer edges are arranged at equal intervals.

[0005] In another embodiment of the present invention, the microstructure lens includes a lens body and a plurality of microstructures. The lens body has a bottom surface, a top surface, and an arcuate surface, with the arcuate surface extending between the top and bottom surfaces. A plurality of microstructures are disposed on the arcuate surface of the lens body, each microstructure having a circular outer edge. Viewed from above the lens body, the centers of the multiple circular outer edges of the multiple microstructures fall at the same position, and the multiple circular outer edges are arranged at equal intervals. Attached Figure Description

[0006] The various aspects of the invention will be best understood by reading the following detailed description in conjunction with the accompanying drawings. It should be noted that, according to standard practice in the industry, the various features are not drawn to scale. In fact, for clarity of explanation, the dimensions of the various features may be arbitrarily increased or decreased.

[0007] Figure 1 This is a cross-sectional schematic diagram of the microstructure lens and the light-emitting diode chip in the first embodiment of the present invention;

[0008] Figure 2 This is a three-dimensional schematic diagram of the microstructure lens in the first embodiment of the present invention;

[0009] Figure 3A and Figure 3B This is a schematic diagram showing the intensity distribution of light emitted by the LED chip in the first embodiment of the present invention after passing through different microstructure lenses;

[0010] Figure 4 This is a cross-sectional schematic diagram of the microstructure lens and the light-emitting diode chip according to the second embodiment of the present invention;

[0011] Figure 5 This is a three-dimensional schematic diagram of the microstructure lens in the second embodiment of the present invention;

[0012] Figure 6A and Figure 6B This is a schematic diagram showing the intensity distribution of light emitted by the LED chip in the second embodiment of the present invention after passing through different microstructure lenses;

[0013] Figures 7A to 7D These are cross-sectional schematic diagrams of microstructured lenses according to different embodiments of the present invention;

[0014] Figure 8 This is a cross-sectional schematic diagram of the microstructure lens and the light-emitting diode chip in the third embodiment of the present invention;

[0015] Figure 9 This is a three-dimensional schematic diagram of the microstructure lens in the third embodiment of the present invention;

[0016] Figure 10 This is a schematic diagram of the intensity distribution of light emitted by the LED chip after passing through the microstructure lens in the third embodiment of the present invention;

[0017] Figure 11 This is a cross-sectional schematic diagram of the microstructure lens and the light-emitting diode chip in the fourth embodiment of the present invention;

[0018] Figure 12 This is a three-dimensional schematic diagram of the microstructure lens in the fourth embodiment of the present invention;

[0019] Figure 13This is a schematic diagram of the intensity distribution of light emitted by the LED chip after passing through the microstructure lens in the fourth embodiment of the present invention.

[0020] Figures 14A to 14C This is a three-dimensional schematic diagram of a microstructure lens in another embodiment of the present invention. Detailed Implementation

[0021] Figure 1 This is a cross-sectional schematic diagram of the microstructure lens and the light-emitting diode chip according to the first embodiment of the present invention. Figure 2 This is a three-dimensional schematic diagram of a microstructure lens according to the first embodiment of the present invention. Figure 3A and Figure 3B This is a schematic diagram showing the intensity distribution of light emitted by a light-emitting diode chip according to the first embodiment of the present invention after passing through different microstructure lenses.

[0022] Please refer to Figure 1 and Figure 2 The microstructure lens 100 of this embodiment includes a lens body 110 and a plurality of microstructures 120 located on the lens body 110. The lens body 110 has a bottom surface 110B and an arcuate surface 110S. The plurality of microstructures 120 are disposed on the arcuate surface 110S of the lens body 110. Each microstructure 120 has a circular outer edge. Viewed from above the lens body 110, the centers of the circular outer edges of the plurality of microstructures 120 fall at the same position, and the plurality of circular outer edges are arranged at equal intervals D. Here, the arrangement interval D can be defined as the lateral distance between the circular outer edge of each microstructure 120 and the circular outer edge of an adjacent microstructure 120 (e.g., adjacent microstructures 120 in the inner or outer ring). In this embodiment, the arrangement interval D between the plurality of microstructures 120 may, for example, be between 0.005 mm and 0.5 mm. For example, the arrangement interval D between the microstructures 120 is 0.1 mm.

[0023] A light-emitting diode (LED) chip 200 is disposed on a circuit board 300 and electrically connected to the circuit board 300. The LED chip 200 can be encapsulated by an encapsulating agent 250 disposed on the circuit board 300. In some embodiments, the encapsulating agent 250 is an optical colloid, which can be used to protect the LED chip 200 and facilitate the conduction of light emitted by the LED chip 200. The LED chip 200, the encapsulating agent 250, and the circuit board 300 are disposed below the microstructure lens 100, wherein the LED chip 200 and the encapsulating agent 250 are located between the microstructure lens 100 and the circuit board 300. For example, the length and width of the LED chip 200 are both 0.508 mm, and the thickness of the LED chip 200 is 0.15 mm. The length and width of the encapsulating agent 250 are both greater than the length and width of the LED chip 200, and the thickness of the encapsulating agent 250 is greater than the thickness of the LED chip 200. In this embodiment, the circuit board 300 may include a rigid printed circuit board, a flexible printed circuit board, or other types of circuit substrates. For example... Figure 1 As shown, a microlens 100 is disposed above a light-emitting diode (LED) chip 200, which is adapted to emit light. The microlens 100 is positioned to cover most of the light emitted by the LED chip 200. The microlens structure 110 can be disposed above a single LED chip 200 or multiple LED chips 200. In this embodiment, the half-circle angle of the microlens 100 can correspond to the beam divergence half-angle of the LED chip 200, and both the half-circle angle of the microlens 100 and the beam divergence half-angle of the LED chip 200 are θ, with θ ranging from 20 degrees to 80 degrees. For example, the half-circle angle of the microlens 100 and the beam divergence half-angle θ of the LED chip 200 are approximately 60 degrees. The shortest distance between the LED chip 200 and the microlens 100 can be determined according to the overall optical design.

[0024] In some embodiments, the number of light-emitting diode (LED) chips 200 is multiple, and the multiple LED chips 200 are arranged in an array on the circuit board 300. The number of microstructure lenses 100 is also multiple, and the microstructure lenses 100 are arranged in an array above the corresponding LED chips 200. The aforementioned arrayed LED chips 200 and arrayed microstructure lenses 100 can constitute a direct-lit backlight module that provides a surface light source. In addition, according to the overall optical design of the backlight module, a certain number of diffuser sheets and / or prism sheets can be selectively disposed between the arrayed LED chips 200 and the arrayed microstructure lenses 100 to enable the direct-lit backlight module to provide a surface light source with good uniformity.

[0025] like Figure 1As shown, to further improve the uniformity of light source distribution, the lens body 110 of this embodiment includes a base portion 112 and a curved portion 114 located on the base portion 112. The base portion 112 and the curved portion 114 can be integrally formed, for example, the base portion 112 and the curved portion 114 can be made of the same optical material. In other embodiments, the base portion 112 and the curved portion 114 can be made of different optical materials (e.g., materials with different refractive indices). Figure 1 and Figure 2 It can be seen that the bottom surface of the base portion 112 is the bottom surface 110B of the lens body 110, and the upper surface of the arc-shaped portion 114 is the arc-shaped surface 110S of the lens body 110. The base portion 112 can be a cylindrical body with a thickness H1. The bottom surface 110B of the lens body 110 can be a circular bottom surface with a diameter W. The arc-shaped surface 110S of the arc-shaped portion 114 has a radius of curvature R, and the arc-shaped portion 114 has a maximum height H2. The thickness H1 of the base 112 is between 0.05mm and 5mm, the diameter W of the bottom surface 110B is between 0.5mm and 5mm, the radius of curvature R of the arc-shaped surface 110S is between 0.1mm and 10mm, and the maximum height H2 of the arc-shaped portion 114 is between 0.05mm and 10mm. For example, the thickness H1 of the base 112 is 0.15 mm, the diameter W of the bottom surface 110B is 3.46 mm, the radius of curvature R of the arcuate surface 110S is 2 mm, and the maximum height H2 of the arcuate portion 114 is 1 mm. In other words, the base portion 112 has an annular sidewall perpendicular to the bottom surface 110B, and the annular sidewall of the base portion 112 extends between the bottom surface 110B and the arcuate surface 110S. In this embodiment, the microstructure 120 is only distributed on the arcuate surface 110S, and the microstructure 120 is not distributed on the sidewall of the base 112.

[0026] like Figure 2As shown, the microstructure 120 includes a central circular microstructure 122 and a plurality of annular microstructures 124, wherein the plurality of annular microstructures 124 surround the central circular microstructure 122. The outermost (outer ring) annular microstructures of the annular microstructures 124 may have a larger thickness (e.g., maximum thickness), while the innermost (inner ring) annular microstructures of the annular microstructures 124 may have a smaller thickness (e.g., maximum thickness). Furthermore, each annular microstructure 124 has a circular inner edge and a circular outer edge, and there is a height difference h between the circular outer edge and the circular inner edge of each annular microstructure 124. In this embodiment, the height difference h between the inner and outer edges of the circle is between -0.06 mm and 0.34 mm. When the outer edge of the annular microstructure 124 is higher than its inner edge, the height difference h is positive; conversely, when the outer edge is lower than its inner edge, the height difference h is negative. Figure 3A As shown, there is a height difference h between the outer and inner edges of each annular microstructure 124. When the height difference h between the inner and outer edges is between -0.06 mm and 0.34 mm (i.e., h = -0.06 mm, h = 0 mm, h = 0.34 mm), the light intensity at the center of the microstructure lens 100 can be effectively reduced. Conversely, when the height difference h is less than -0.06 mm or greater than 0.34 mm (i.e., h = -0.08 mm, h = 0.36 mm), the light intensity at the center of the microstructure lens 100 cannot be effectively reduced. Furthermore, the ratio (h / D) of the aforementioned height difference h to the arrangement spacing D (i.e., the arrangement spacing D of the annular microstructures 124) is between -0.6 and 3.4.

[0027] Any two adjacent annular microstructures 124 can be distinguished as an innermost (inner ring) annular microstructure 124 and an outermost (outer ring) annular microstructure 124. The lateral distance between the outer circular edges of the innermost (inner ring) and outermost (outer ring) annular microstructures 124 can be defined as the arrangement spacing D, and the annular microstructure 124 has a top width d. Figure 1 and Figure 2 Taking the illustrated annular microstructure 124 as an example, the height difference h between the outer and inner edges of the annular microstructure 124 is positive (i.e., the outer edge of the annular microstructure 124 is higher than the inner edge of the annular microstructure 124), and the ratio (h / D) of the height difference h to the arrangement spacing D is also positive. In addition, the top width d of the annular microstructure 124 is equal to the arrangement spacing D.

[0028] Figure 4 This is a cross-sectional schematic diagram of the microstructure lens and the light-emitting diode chip according to the second embodiment of the present invention. Figure 5 This is a three-dimensional schematic diagram of a microstructure lens according to the second embodiment of the present invention. Figure 6A and Figure 6B This is a schematic diagram showing the intensity distribution of light emitted by a light-emitting diode chip according to the second embodiment of the present invention after passing through different microstructure lenses.

[0029] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 The microstructure lens 100' of this embodiment is similar to the microstructure lens 100 of the first embodiment. In the microstructure lens 100', the microstructure 120' includes a central circular microstructure 122' and a plurality of annular microstructures 124', wherein the plurality of annular microstructures 124' surround the central circular microstructure 122'. The outermost (outer ring) annular microstructures of the annular microstructures 124' may have a larger thickness (e.g., maximum thickness), while the innermost (inner ring) annular microstructures of the annular microstructures 124' may have a smaller thickness (e.g., maximum thickness). Furthermore, each annular microstructure 124' has a circular inner edge and a circular outer edge, and the circular outer edge of each annular microstructure 124' is flush with the circular inner edge. In other words, there is no height difference h between the circular outer edge and the circular inner edge of each annular microstructure 124' (i.e., the height difference h between the circular inner edge and the circular outer edge of each annular microstructure 124' is 0). Furthermore, any two adjacent annular microstructures 124' can be distinguished as an inner (inner ring) annular microstructure 124' and an outer (outer ring) annular microstructure 124'. The lateral distance between the outer circular edges of the inner (inner ring) and outer (outer ring) annular microstructures 124' can be defined as the arrangement spacing D, and the annular microstructure 124' has a top width d. Figure 4 and Figure 5 Taking the illustrated annular microstructure 124' as an example, the top width d of the annular microstructure 124' can be between 0.06 mm and 0.12 mm, and the ratio of the top width d to the arrangement spacing D (d / D) can be between 0.6 and 1.2.

[0030] like Figure 6A As shown, when the top width d of the annular microstructure 124' is between 0.06 mm and 0.12 mm (i.e., d=0.06 mm, d=0.1 mm, d=0.12 mm), the light intensity at the center of the microstructure lens 100' can be effectively reduced; conversely, when the top width d of the annular microstructure 124' is less than 0.06 mm or greater than 0.14 mm (i.e., d=0.04 mm, h=0.14 mm), the light intensity at the center of the microstructure lens 100' cannot be effectively reduced.

[0031] Figures 7A to 7D These are cross-sectional schematic diagrams of microstructured lenses according to different embodiments of the present invention.

[0032] Please refer to Figures 7A to 7D ,exist Figure 7A In the microstructure lens 100A shown in the figure, the height difference h between the inner and outer edges of each annular microstructure 120A is -0.06 mm, and the top width d of the annular microstructure 120A is equal to the arrangement spacing D; Figure 7B In the microstructure lens 100B shown in the figure, the height difference h between the inner and outer edges of each annular microstructure 120B is 0.34 mm, and the top width d of the annular microstructure 120A is equal to the arrangement spacing D; Figure 7C In the microstructure lens 100C shown in the figure, the height difference h between the inner and outer edges of each annular microstructure 120C is 0, and the top width d of the annular microstructure 120C is 0.12 mm; while Figure 7D In the microstructure lens 100C' shown in the figure, the height difference h between the inner and outer edges of each annular microstructure 120C' is 0, and the top width d of the annular microstructure 120C' is 0.06mm.

[0033] Figure 8 This is a cross-sectional schematic diagram of the microstructure lens and the light-emitting diode chip according to the third embodiment of the present invention. Figure 9 This is a three-dimensional schematic diagram of a microstructure lens according to the third embodiment of the present invention. Figure 10 This is a schematic diagram showing the intensity distribution of light emitted by a light-emitting diode chip after passing through a microstructure lens according to the third embodiment of the present invention.

[0034] Please refer to Figure 8 and Figure 9The microstructure lens 100D includes a lens body 110D and a plurality of microstructures 120. The lens body 110D has a bottom surface 110B, a top surface 110T, and an arcuate surface 110S, wherein the arcuate surface 110S extends between the top surface 110T and the bottom surface 110B. The plurality of microstructures 120 are disposed on the arcuate surface 110S of the lens body 110D, wherein each microstructure 120 has a circular outer edge. Viewed from above the lens body, the centers of the multiple circular outer edges of the multiple microstructures fall at the same position, and the multiple circular outer edges are arranged at equal intervals D. Here, the arrangement interval D can be defined as the lateral distance between the circular outer edge of each microstructure 120 and the circular outer edge of an adjacent microstructure 120 (e.g., adjacent microstructures 120 in the inner or outer ring). In this embodiment, the arrangement interval D between the plurality of microstructures 120 is between 0.005 mm and 0.5 mm. For example, the spacing D between the microstructures 120 is 0.1 mm. In this embodiment, both the bottom surface 110B and the top surface 110T are planar, and both have a circular outline when viewed from above the lens body 110D. The flat top surface 110T of the lens body 110D can effectively reduce the light intensity corresponding to the center of the microstructure lens 100D.

[0035] The lens body 110D of this embodiment includes a base portion 112 and an arcuate portion 114 located on the base portion 112. The base portion 112 and the arcuate portion 114 can be integrally formed, for example, the base portion 112 and the arcuate portion 114 can be made of the same optical material. In other embodiments, the base portion 112 and the arcuate portion 114 can be made of different optical materials (e.g., materials with different refractive indices). Figure 8 and Figure 9It can be seen that the bottom surface of the base portion 112 is the bottom surface 110B of the lens body 110D, and the upper surface of the arc-shaped portion 114 is the arc-shaped surface 110S and the top surface 110T of the lens body 110D. The base portion 112 can be a cylindrical body with a thickness H1. The bottom surface 110B of the lens body 110D can be a circular bottom surface with a diameter W. The top surface 110T of the lens body 110D can be a circular bottom surface with a diameter W'. The arc surface 110S of the arc portion 114 has a radius of curvature R and a maximum height H2. The thickness H1 of the base 112 is between 0.05mm and 5mm, the diameter W of the bottom surface 110B is between 0.5mm and 10mm, the diameter W' of the top surface 110T is between 0.1mm and 5mm, the radius of curvature R of the arc surface 110S is between 0.1mm and 10mm, and the maximum height H2 of the arc portion 114 is between 0.05mm and 10mm. For example, the thickness H1 of the base 112 is 0.15 mm, the diameter W of the bottom surface 110B is 4.96 mm, the diameter W' of the top surface 110T is 1.5 mm, the radius of curvature R of the arcuate surface 110S is 2 mm, and the maximum height H2 of the arcuate portion 114 is 1 mm. In other words, the base portion 112 has an annular sidewall perpendicular to the bottom surface 110B, and the annular sidewall of the base portion 112 extends between the bottom surface 110B and the arcuate surface 110S. In this embodiment, the microstructure 120 is only distributed on the arcuate surface 110S, and the microstructure 120 is not distributed on the sidewall of the base 112 or on the top surface 110T of the lens body 110D.

[0036] like Figure 9 As shown, the microstructure 120 includes a central circular microstructure 122 and a plurality of annular microstructures 124, wherein the plurality of annular microstructures 124 surround the central circular microstructure 122. The outermost (outer ring) annular microstructures of the annular microstructures 124 may have a larger thickness (e.g., maximum thickness), while the innermost (inner ring) annular microstructures of the annular microstructures 124 may have a smaller thickness (e.g., maximum thickness). Furthermore, each annular microstructure 124 has a circular inner edge and a circular outer edge, and the height difference between the circular outer edge and the circular inner edge of each annular microstructure 124 is h. In this embodiment, the height difference h between the inner and outer edges of the circular ring is between -0.06 mm and 0.34 mm. When the outer edge of the annular microstructure 124 is higher than its inner edge, the height difference h is positive; conversely, when the outer edge is lower than its inner edge, the height difference h is negative. Furthermore, the ratio (h / D) of the aforementioned height difference h to the arrangement spacing D (i.e., the arrangement spacing D of the annular microstructure 124) is between -0.6 and 3.4.

[0037] Any two adjacent annular microstructures 124 can be distinguished as an innermost (inner ring) annular microstructure 124 and an outermost (outer ring) annular microstructure 124. The lateral distance between the outer circular edges of the innermost (inner ring) and outermost (outer ring) annular microstructures 124 can be defined as the arrangement spacing D, and the annular microstructure 124 has a top width d. Figure 8 and Figure 9 Taking the illustrated annular microstructure 124 as an example, the height difference h between the outer and inner edges of the annular microstructure 124 is 0 (i.e., the outer and inner edges of the annular microstructure 124 are flush), and the ratio (h / D) of the height difference h to the arrangement spacing D is also 0. In addition, the top width d of the annular microstructure 124 is equal to the arrangement spacing D.

[0038] Please refer to Figure 10 The design of the top surface 110T of the lens body 110D and the annular microstructure 124 can effectively reduce the light intensity at the center of the microstructure lens 100D.

[0039] Figure 11 This is a cross-sectional schematic diagram of the microstructure lens and the light-emitting diode chip according to the fourth embodiment of the present invention. Figure 12 This is a three-dimensional schematic diagram of a microstructure lens according to the fourth embodiment of the present invention. Figure 13 This is a schematic diagram of the intensity distribution of light emitted by a light-emitting diode chip according to the fourth embodiment of the present invention after passing through a microstructure lens.

[0040] Please refer to Figure 8 , Figure 9 , Figure 11 and Figure 12 The microstructure lens 100E in this embodiment is similar to the microstructure lens 100D in the third embodiment. The top surface 110T' of the microstructure lens 100E is a recessed area and has the same radius of curvature R as the arc-shaped part. The microstructure 120 is not distributed on the side wall of the base 112 or on the top surface recessed area 110T' of the lens body 110E.

[0041] Please refer to Figure 13 The design of the annular microstructure 124 and the recessed area of ​​the lens body 110E can effectively reduce the light intensity corresponding to the center of the microstructure lens 100D.

[0042] Figures 14A to 14CThis is a three-dimensional schematic diagram of a microstructured lens in another embodiment of the present invention. The microstructured lenses 100F, 100G, and 100H in this embodiment are similar to the microstructured lenses 100', 100D, and 100E in the previous embodiments. The microstructured lenses 100F, 100G, and 100H have at least one trimming side surface TS, so that the microstructured lenses 100F, 100G, and 100H can be designed into the required configuration as needed.

[0043] In the above embodiments of the invention, the equidistant arrangement of the annular microstructures on the lens body in the horizontal direction can effectively reduce the light intensity corresponding to the center of the microstructure lens, thereby making the surface light source using this microstructure lens more uniform.

[0044] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be defined by the appended claims and their equivalents.

[0045] The foregoing outlines features of several embodiments to enable those skilled in the art to better understand various aspects of the invention. Those skilled in the art will understand that they can readily use the invention as a basis for designing or modifying other processes and structures to achieve the same purposes and / or realize the same advantages as the embodiments described herein. Those skilled in the art should also recognize that these equivalent constructions do not depart from the spirit and scope of the invention, and that various changes, substitutions, and modifications can be made herein without departing from the spirit and scope of the invention.

Claims

1. A microstructure lens, characterized in that, include: The lens body has a bottom surface and an arc-shaped surface; as well as Multiple microstructures are disposed on the arcuate surface of the lens body, wherein each microstructure has a circular outer edge. When viewed from above the lens body, the centers of the multiple circular outer edges of the multiple microstructures fall at the same position, and the multiple circular outer edges are arranged at equal intervals.

2. The microstructure lens as described in claim 1, characterized in that, The plurality of microstructures includes: Central circular microstructure; and A plurality of annular microstructures surround the central circular microstructure, characterized in that the thickness of the outermost annular microstructure is greater than the thickness of the innermost annular microstructure.

3. The microstructure lens as described in claim 1, characterized in that, The plurality of microstructures each have a circular inner edge and a circular outer edge, and in each of the microstructures, the circular outer edge is higher than the circular inner edge.

4. The microstructure lens as described in claim 1, characterized in that, The plurality of microstructures each have a circular inner edge and a circular outer edge, and in each of the microstructures, the circular outer edge is lower than the circular inner edge.

5. The microstructure lens as described in claim 1, characterized in that, Each of the microstructures has a circular inner edge and a circular outer edge, and in each of the microstructures, the circular outer edge is flush with the circular inner edge.

6. The microstructure lens as described in claim 1, characterized in that, Each of the microstructures has a circular inner edge and a circular outer edge, and in each of the microstructures, the height difference between the circular outer edge and the circular inner edge is between -0.06 mm and 0.34 mm.

7. The microstructure lens as described in claim 1, characterized in that, Each of the microstructures has a circular inner edge and a circular outer edge, and in each of the microstructures, the height difference between the circular outer edge and the circular inner edge is h, the arrangement spacing of the plurality of circular outer edges is D, and the ratio (h / D) is between -0.6 and 3.

4.

8. A microstructure lens, characterized in that, include: The lens body has a bottom surface, a top surface, and an arcuate surface, wherein the arcuate surface extends between the top surface and the bottom surface; as well as Multiple microstructures are disposed on the arcuate surface of the lens body, wherein each microstructure has a circular outer edge. When viewed from above the lens body, the centers of the multiple circular outer edges of the multiple microstructures fall at the same position, and the multiple circular outer edges are arranged at equal intervals.

9. The microstructure lens as described in claim 8, characterized in that, The bottom surface and the top surface are planar, and when viewed from above the lens body, the bottom surface and the top surface have a circular outline.

10. The microstructure lens as described in claim 8, characterized in that, The plurality of microstructures includes a plurality of first annular microstructures surrounding the top surface, wherein the thickness of the outermost annular microstructure among the plurality of first annular microstructures is greater than the thickness of the innermost annular microstructure among the plurality of first annular microstructures.

11. The microstructure lens as described in claim 8, characterized in that, The plurality of microstructures each have a circular inner edge and a circular outer edge, and in each of the microstructures, the circular outer edge is higher than the circular inner edge.

12. The microstructure lens as described in claim 8, characterized in that, The plurality of microstructures each have a circular inner edge and a circular outer edge, and in each of the microstructures, the circular outer edge is lower than the circular inner edge.

13. The microstructure lens as described in claim 8, characterized in that, Each of the microstructures has a circular inner edge and a circular outer edge, and in each of the microstructures, the circular outer edge is flush with the circular inner edge.

14. The microstructure lens as described in claim 8, characterized in that, Each of the microstructures has a circular inner edge and a circular outer edge, and in each of the microstructures, the height difference between the circular outer edge and the circular inner edge is between -0.06 mm and 0.34 mm.

15. The microstructure lens as described in claim 8, characterized in that, Each of the microstructures has a circular inner edge and a circular outer edge, and in each of the microstructures, the height difference between the circular outer edge and the circular inner edge is h, the arrangement spacing of the plurality of circular outer edges is D, and the ratio (h / D) is between -0.6 and 3.

4.

16. The microstructure lens as described in claim 8, characterized in that, The top surface is a recessed area.

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