Light emitting module and optical lens thereof

Patent metadata

Field	Value
Publication number	US-2022382106-A1
Application number	US-202117329140-A
Country	US
Kind code	A1
Filing date	May 25, 2021
Priority date	May 25, 2021
Publication date	Dec 1, 2022
Grant date	—

Abstract

An optical lens includes an optical transparent body which has an upper surface, a lower surface, a lateral surface and a lower concave portion. The upper surface includes a central upper concave portion, an outwardly-concave curved surface continuous from the central upper concave portion, and an inwardly-concave curved surface continuous from the outwardly-concave curved surface. The lateral surface is connected between the inwardly-concave curved surface and the lower surface. The lower concave portion is recessed from the lower surface.

First claim

1 . An optical lens comprising:
an optical transparent body comprising: an upper surface comprising a central upper concave portion, an outwardly-convex curved surface continuous from the central upper concave portion, and an inwardly-concave curved surface continuous from the outwardly convex curved surface; a lower surface; a lateral surface connected between the inwardly-concave curved surface and the lower surface, wherein a first interface between the inwardly-concave curved surface and the lateral surface is closer to the lower surface than a curved interface between the outwardly-convex curved surface and the inwardly-concave curved surface; and a lower concave portion recessed from the lower surface.

2 . The optical lens of claim 1 , wherein the optical transparent body comprises a refractive index greater than 1.5.

3 . The optical lens of claim 1 , wherein the upper surface is defined by a plurality of concentric circumferences disposed from the central upper concave portion to the lateral surface.

4 . The optical lens of claim 3 , wherein a first concentric circumference of the plurality of concentric circumferences defines a second interface between the central upper concave portion and the outwardly convex curved surface.

5 . The optical lens of claim 4 , wherein a last concentric circumference of the plurality of concentric circumferences defines the first interface between the inwardly-concave curved surface and the lateral surface.

6 . The optical lens of claim 5 , wherein one concentric circumference between the first and last concentric circumferences defines the curved interface between the outwardly-convex curved surface and the inwardly-concave curved surface.

7 . The optical lens of claim 1 , wherein a point of inflection connects the outwardly-convex curved surface and the inwardly-concave curved surface.

8 . The optical lens of claim 1 , wherein the lower concave portion is disposed centrally of the lower surface and aligned with the central upper concave portion.

9 . A light emitting module comprising:
a substrate; a light-emitting element disposed on the substrate; and the optical lens of claim 1 , wherein the light-emitting element is housed within the lower concave portion of the optical transparent body.

10 . The light emitting module of claim 9 further comprising an optical transparent media filled within the lower concave portion of the optical transparent body.

11 . An optical lens comprising:
an optical transparent body comprising: an upper surface comprising a central upper concave portion and a curved surface continuous from the central upper concave portion; a lower surface; a lateral surface connected between the curved surface and the lower surface; a lower concave portion recessed from the lower surface, wherein the lower concave portion comprises a light incident surface, and the light incident surface has a top surface and a curved sidewall surface continuous from the top surface and connecting to the lower surface, wherein a curvature of the top surface is greater than that of the curved sidewall surface, the top surface surrounds and defines a first hollow space, and the curved sidewall surface surrounds and defines a second hollow space; and an optical transparent media filled within the second hollow space and not filled within the first hollow space.

12 . The optical lens of claim 11 , wherein the top surface is a hemispherical surface.

13 . The optical lens of claim 11 , wherein the lower concave portion is disposed centrally of the lower surface and aligned with the central upper concave portion.

14 . The optical lens of claim 11 , wherein the lateral surface is substantially perpendicular to an edge of the lower surface.

15 . The optical lens of claim 11 , wherein the lower concave portion is defined by a relatively small circumference and a relatively large circumference, wherein the relatively large circumference defines an interface between the curved sidewall surface and the lower surface.

16 . The optical lens of claim 15 , wherein the relatively small circumference defines an interface between the top surface and the curved sidewall surface.

17 . A light emitting module comprising:
a substrate; a light-emitting element disposed on the substrate; and the optical lens of claim 11 , wherein the light-emitting element is housed within the lower concave portion of the optical transparent body.

18 .- 19 . (canceled)

20 . The light emitting module of claim 17 , wherein the optical transparent media comprises a refractive index smaller than that of the optical transparent body.

Assignees

• Lextar Electronics Corp

Inventors

• Lai Lung-Kuan
• Chen Ting-Kai
• Lin Jiun-Hong

Classifications

• G02F1/133607 Primary

  the light controlling member including light directing or refracting elements, e.g. prisms or lenses · CPC title

• G02F1/133611

  including means for improving the brightness uniformity · CPC title

• G02F1/133603 Primary

  with LEDs · CPC title