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KR-20260064221-A - OPTICAL LENS, LIGHT EMITTING MODULE AND LIGHT UNIT HAVING THEREOF

KR20260064221AKR 20260064221 AKR20260064221 AKR 20260064221AKR-20260064221-A

Abstract

An embodiment of the invention discloses an optical lens and a light-emitting module having the same. The optical lens disclosed in an embodiment of the invention comprises: a bottom surface; a concave recess in a center region of the bottom surface; an incident surface around the periphery of the recess; and a light-emitting surface disposed on the incident surface and emitting light incident through the incident surface. and includes a flange portion disposed between the light emission surface and the outer edge of the bottom surface, wherein the bottom of the recess has a length in a first axis direction passing through the center of the bottom of the recess greater than the length in a second axis direction orthogonal to the first axis direction, and the bottom surface has a length in a first axis direction passing through the center of the bottom of the recess smaller than the length in a second axis direction, and the bottom surface includes a first reflection area around the perimeter of the recess and a second reflection area around the perimeter of the first reflection area, wherein the first reflection area includes a first reflection pattern having a ring shape around the perimeter of the recess, a second reflection pattern having a ring-shaped concave groove on the outer side of the first reflection pattern, a ring-shaped third reflection pattern on the outer side of the second reflection pattern, and a fourth reflection pattern having a ring-shaped concave groove on the outer side of the third reflection pattern, wherein the first reflection pattern has a flat surface, the width in the second axis direction is the largest, and in the first axis direction The closer they are, the smaller they can become.

Inventors

  • 조성국

Assignees

  • 예지아 옵티컬 테크놀로지 광동 코포레이션

Dates

Publication Date
20260507
Application Date
20241031

Claims (13)

  1. Bottom surface; A concave recess in the center area of the above-mentioned bottom surface; Incident surface around the perimeter of the above recess; A light emission surface disposed on the incident surface and emitting light incident through the incident surface; and It includes a flange portion disposed between the light emission surface and the outer edge of the bottom surface, The bottom of the recess has a length in the first axis direction passing through the center of the bottom of the recess that is greater than the length in the second axis direction that is orthogonal to the first axis direction, and The above bottom surface has a length in the first axis direction passing through the bottom center of the above recess that is smaller than the length in the second axis direction, and The above bottom surface includes a first reflection area around the perimeter of the recess and a second reflection area around the perimeter of the first reflection area, and The first reflection area comprises a first reflection pattern having a ring shape around the perimeter of the recess, a second reflection pattern having a ring-shaped concave groove on the outer side of the first reflection pattern, a third reflection pattern having a ring shape on the outer side of the second reflection pattern, and a fourth reflection pattern having a ring-shaped concave groove on the outer side of the third reflection pattern. An optical lens having a first reflection pattern having a flat surface, with the width in the second axis direction being the largest and gradually decreasing as it approaches the first axis direction.
  2. In paragraph 1, An optical lens, wherein the third reflection pattern has a flat surface and has a width smaller than the width of the second and fourth reflection patterns.
  3. In paragraph 2, An optical lens in which the width of the third reflection pattern is smaller than the maximum width of the first reflection pattern and larger than the minimum width.
  4. In any one of paragraphs 1 through 3, An optical lens comprising a fourth reflection pattern having first and second sub-patterns spaced apart from each other on both outer sides of the first axis direction, having a depth smaller than the depth of the fourth reflection pattern.
  5. In paragraph 4, The first and second sub-patterns above are optical lenses having a crescent shape.
  6. In any one of paragraphs 1 through 3, An optical lens, wherein the second reflection area is provided as an inclined or convex surface from the first reflection area to the outer edge of the bottom surface.
  7. In any one of paragraphs 1 through 3, The above bottom surface is elliptical in shape, and The bottom shape of the above recess is elliptical, and An optical lens in which the outer shape of the first reflection pattern is a circular or elliptical shape.
  8. In Paragraph 7, The second reflection pattern is an elliptical shape in which the length in the second axis direction is longer than the length in the first axis direction, and The above-mentioned fourth reflection pattern is an optical lens having an elliptical shape in which the length in the second axis direction is longer than the length in the first axis direction.
  9. In paragraph 8, An optical lens comprising a plurality of coupling protrusions protruding from the bottom surface, and a plurality of seating protrusions having a thickness smaller than the thickness of the plurality of supporting protrusions.
  10. Circuit board; A plurality of light-emitting elements disposed on the circuit board and emitting light; and It includes a plurality of optical lenses arranged along the circuit board and disposed on each of the plurality of light-emitting elements, The above circuit board has a width in the second axis direction that is smaller than the length in the first axis direction, and Each of the above optical lenses is an optical lens of claim 8, and The plurality of optical lenses are arranged along the first axis direction of the circuit board, and The width of the circuit board in the second axis direction is smaller than the length in the second axis direction of each of the optical lenses, and The lower end of the incident surface of the optical lens is spaced apart from the upper surface of the circuit board, and A light-emitting module having a lower part of the incident surface of the optical lens having a vertical plane and a height lower than the upper height of the light-emitting element.
  11. In Paragraph 10, A light-emitting module, wherein the fourth reflection pattern of the optical lens comprises first and second sub-patterns spaced apart from each other and having a depth smaller than the depth of the fourth reflection pattern on both outer sides of the first axis direction.
  12. In Paragraph 11, The above first and second sub-patterns are a light-emitting module having a crescent shape.
  13. In Paragraph 11, A light-emitting module, wherein the second reflection area is provided as an inclined or convex surface from the first reflection area to the outer edge of the bottom surface.

Description

Optical lens, light-emitting module and light unit having the same The invention relates to an optical lens, a light-emitting module, and a light unit equipped with the same. Light-emitting devices, such as light-emitting diodes (LEDs), are a type of semiconductor device that converts electrical energy into light, and they are gaining attention as next-generation light sources to replace conventional fluorescent and incandescent lamps. Since light-emitting diodes (LEDs) generate light using semiconductor devices, they consume very low power compared to incandescent lamps that generate light by heating tungsten, or fluorescent lamps that generate light by striking a phosphor with ultraviolet rays generated through high-voltage discharge. In addition, light-emitting diodes generate light using the potential gap of semiconductor devices, so they have a longer lifespan and faster response characteristics compared to conventional light sources, and are environmentally friendly. Accordingly, much research is being conducted to replace existing light sources with light-emitting diodes, and the use of light-emitting diodes is increasing as a light source for lighting devices such as various indoor and outdoor lamps, display devices, electronic billboards, vehicle lighting, and streetlights. Light emitted from LEDs has strong directional properties and tends to concentrate in the direction facing the LED's emission surface. Consequently, there is a growing demand for technology to effectively and uniformly diffuse this LED light. While it is necessary to diffuse the emitted light symmetrically and uniformly, lenses are required to distribute the light in different directions depending on the LED arrangement. FIG. 1 is a perspective view of a light-emitting module having an optical lens on a circuit board according to an embodiment of the invention. Figure 2 is a perspective view showing the circuit board and optical lens in Figure 1. Figure 3 is a plan view of the light-emitting module in Figure 2. Figure 4 is a perspective view of the optical lens of Figure 2. Figure 5 is a bottom view of the optical lens of Figure 4. Figure 6 is a perspective view showing the bottom surface of the optical lens of Figure 4. Figure 7 is a side cross-sectional view of the Y1 line of the light-emitting module of Figure 3. Figure 8 is a partial enlarged view of Figure 7. Figure 9 is a side cross-sectional view of the X1 line of the light-emitting module of Figure 3. Figure 10 is a partial enlarged view of Figure 9. Figure 11 is a diagram illustrating the light paths of the incident plane and the bottom plane of the optical lens of Figure 10. Figures 12 (A) and (B) illustrate an example of light extraction by the reflection pattern of the bottom surface of an optical lens. FIG. 13 is a planar cross-sectional view of the light-emitting module of FIG. 3, showing the shape of the reflection pattern of the optical lens at the first height of the light-emitting element. FIG. 14 is a planar cross-sectional view of the light-emitting module of FIG. 3, showing the shape of the reflection pattern of the optical lens at the second height of the light-emitting element. FIG. 15 is a cross-sectional view showing an example of the coupling of the optical lens coupling projection and the coupling hole of the circuit board in the light-emitting module of FIG. 3. FIG. 16 is a cross-sectional view showing an example of the combination of the mounting projection of the optical lens and the mounting groove of the circuit board in the light-emitting module of FIG. 3. FIG. 17 is a cross-sectional view showing the identification mark of the optical lens in the light-emitting module of FIG. 3. Figures 18 (A) and (B) are comparative drawings showing the luminance distribution of the invention and the comparative example, and (C) and (D) are drawings comparing the luminance distribution on individual lenses and array lenses of the invention and the comparative example. FIG. 19 is a diagram showing the luminance distribution in the second axis (X) direction of the optical lens of a light-emitting module according to an embodiment of the invention. FIG. 20 is a graph comparing the luminance distribution in the second axis (X) direction according to the angle of the lower part of the incident surface of the optical lens and the height of the reflection pattern according to the example of the invention. Embodiments of the invention will become apparent from the following description of the embodiments. The advantages and features of the invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the invention is not limited to the embodiments disclosed below but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the invention is complete and to fully inform those skilled in the art of the sc