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CN-121995557-A - Micro-structured lens

CN121995557ACN 121995557 ACN121995557 ACN 121995557ACN-121995557-A

Abstract

The invention discloses a micro-structure lens, which comprises a lens main body and a plurality of micro-structures. The lens body has a bottom surface and an arcuate surface. The plurality of microstructures are arranged on the arc-shaped surface of the lens main body, wherein each microstructure is provided with a circular outer edge, the circle centers of the circular outer edges of the microstructures fall on the same position when seen from the upper side of the lens main body, and the circular outer edges are arranged at equal intervals.

Inventors

  • LIN JUNTING
  • HUANG YIXIANG
  • ZOU HONG

Assignees

  • 财团法人工业技术研究院

Dates

Publication Date
20260508
Application Date
20241127
Priority Date
20241105

Claims (16)

  1. 1. A lens with a micro-structure, which comprises a lens body, characterized by comprising the following steps: a lens body having a bottom surface and an arcuate surface, and The plurality of microstructures are configured on the arc-shaped surface of the lens main body, wherein each microstructure is provided with a circular outer edge, the circle centers of the circular outer edges of the plurality of microstructures are positioned at the same position when seen from the upper side of the lens main body, and the circular outer edges are arranged at equal intervals.
  2. 2. The microstructured lens of claim 1, wherein the plurality of microstructures comprises: Center circular microstructure, and A plurality of annular microstructures surrounding the central circular microstructure, characterized in that, the thickness of the more outer annular microstructure of the plurality of annular microstructures is greater than the thickness of the more inner annular microstructure of the plurality of annular microstructures.
  3. 3. The microstructured lens of claim 1, wherein the plurality of microstructures each have a rounded inner edge and a rounded outer edge, and wherein in each of the microstructures the rounded outer edge is higher than the rounded inner edge.
  4. 4. The microstructured lens of claim 1, wherein the plurality of microstructures each have a circular inner edge and a circular outer edge, and wherein in each of the microstructures the circular outer edge is lower than the circular inner edge.
  5. 5. The microstructured lens of claim 1, wherein each of said microstructures has a circular inner edge and a circular outer edge, respectively, and wherein in each of said microstructures said circular outer edge is flush with said circular inner edge.
  6. 6. The microstructured lens of claim 1, wherein each microstructure has a circular inner edge and a circular outer edge, and wherein in each microstructure the difference in height between the circular outer edge and the circular inner edge is between-0.06 mm and 0.34 mm.
  7. 7. The microstructured lens of claim 1, wherein each of said microstructures has a circular inner edge and a circular outer edge, and wherein in each of said microstructures, the height difference between said circular outer edge and said circular inner edge is h, the arrangement pitch of said plurality of circular outer edges is D, and the ratio (h/D) is between-0.6 and 3.4.
  8. 8. A lens with a micro-structure, which comprises a lens body, characterized by comprising the following steps: A lens body having a bottom surface, a top surface, and an arcuate surface extending between the top surface and the bottom surface, and The plurality of microstructures are configured on the arc-shaped surface of the lens main body, wherein each microstructure is provided with a circular outer edge, the circle centers of the circular outer edges of the plurality of microstructures are positioned at the same position when seen from the upper side of the lens main body, and the circular outer edges are arranged at equal intervals.
  9. 9. The microstructured lens of claim 8, wherein said bottom surface and said top surface are planar and have a circular profile when viewed from above said lens body.
  10. 10. The microstructured lens of claim 8, wherein the plurality of microstructures comprises a plurality of first annular microstructures surrounding the top surface, wherein a thickness of an outer annular microstructure of the plurality of first annular microstructures is greater than a thickness of an inner annular microstructure of the plurality of first annular microstructures.
  11. 11. The microstructured lens of claim 8, wherein the plurality of microstructures each have a rounded inner edge and a rounded outer edge, and wherein in each of the microstructures the rounded outer edge is higher than the rounded inner edge.
  12. 12. The microstructured lens of claim 8, wherein the plurality of microstructures each have a circular inner edge and a circular outer edge, and wherein in each of the microstructures the circular outer edge is lower than the circular inner edge.
  13. 13. The microstructured lens of claim 8, wherein each of said microstructures has a circular inner edge and a circular outer edge, respectively, and wherein in each of said microstructures said circular outer edge is flush with said circular inner edge.
  14. 14. The microstructured lens of claim 8, wherein each of said microstructures has a circular inner edge and a circular outer edge, respectively, and wherein in each of said microstructures the difference in height between said circular outer edge and said circular inner edge is between-0.06 mm and 0.34 mm.
  15. 15. The microstructured lens of claim 8, wherein each of said microstructures has a circular inner edge and a circular outer edge, and wherein in each of said microstructures, the height difference between said circular outer edge and said circular inner edge is h, the arrangement pitch of said plurality of circular outer edges is D, and the ratio (h/D) is between-0.6 and 3.4.
  16. 16. The microstructured lens of claim 8, wherein the top surface is a recessed area.

Description

Micro-structured lens Technical Field The present invention relates to a lens, and more particularly, to a lens having a plurality of microstructures. Background Displays have been widely used. With the increasing demand for high brightness and high contrast of displays, the type of displays requiring a backlight module, such as liquid crystal displays, has become a mainstream. In the direct type backlight module of the liquid crystal display, the led chips are mostly in bare die design, and a diffusion sheet and a prism sheet are generally disposed above the led chips arranged in array. The diffusion sheet has a light homogenizing effect on the light rays emitted by the light emitting diode chip, the prism sheet has a bundling effect on the light rays emitted by the light emitting diode chip, the diffusion sheet and the prism sheet are matched to enable the light rays to have maximum intensity in the normal direction of the liquid crystal display, and the design can lead to the problem of uneven overall illumination of the liquid crystal display. In general, it is generally necessary to shorten the arrangement pitch between the light emitting diode chips, and a diffusion sheet of high haze is used to improve the foregoing problems. However, when the arrangement pitch between the light emitting diode chips is shortened, the number of light emitting diode chips used in the direct type backlight module increases, and when the number of light emitting diode chips used increases, the manufacturing cost of the direct type backlight module increases. Therefore, how to improve the overall illuminance uniformity with a limited number of leds can be a challenge for designers in this field. Disclosure of Invention Embodiments of the present invention provide a micro-structured lens having a good light spreading efficiency therein. In one embodiment of the present invention, a microstructured lens comprises a lens body and a plurality of microstructures. The lens body has a bottom surface and an arcuate surface. The plurality of microstructures are arranged on the arc-shaped surface of the lens main body, wherein each microstructure is provided with a circular outer edge, the circle centers of the circular outer edges of the microstructures fall on the same position when seen from the upper side of the lens main body, and the circular outer edges are arranged at equal intervals. In another embodiment of the present invention, a microstructured lens comprises a lens body and a plurality of microstructures. The lens body is provided with a bottom surface, a top surface and an arc-shaped surface, and the arc-shaped surface extends between the top surface and the bottom surface. The plurality of microstructures are arranged on the arc-shaped surface of the lens main body, wherein each microstructure is provided with a circular outer edge, the circle centers of the circular outer edges of the microstructures fall on the same position when seen from the upper side of the lens main body, and the circular outer edges are arranged at equal intervals. Drawings The various aspects of the invention are best understood from the following detailed description when read with the accompanying drawing figures. It should be noted that the various features are not drawn to scale in accordance with standard practices in the industry. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion. FIG. 1 is a schematic cross-sectional view of a micro-structured lens and a LED chip according to a first embodiment of the present invention; FIG. 2 is a schematic perspective view of a micro-structured lens according to a first embodiment of the present invention; Fig. 3A and fig. 3B are schematic views showing intensity distribution of light emitted from the led chip after passing through different micro-structure lenses according to a first embodiment of the present invention; FIG. 4 is a schematic cross-sectional view of a micro-structured lens and a LED chip according to a second embodiment of the present invention; FIG. 5 is a schematic perspective view of a micro-structured lens according to a second embodiment of the present invention; fig. 6A and fig. 6B are schematic views showing intensity distribution of light emitted from the led chip after passing through different micro-structure lenses according to a second embodiment of the present invention; FIGS. 7A-7D are schematic cross-sectional views of micro-structured lenses according to various embodiments of the present invention; FIG. 8 is a schematic cross-sectional view of a micro-structured lens and a LED chip according to a third embodiment of the present invention; FIG. 9 is a schematic perspective view of a micro-structured lens according to a third embodiment of the present invention; FIG. 10 is a schematic diagram showing the intensity distribution of light emitted from the LED chip after passing through the micro-structured