Light emitting module and mobile device
A light emitting module includes: a light source; a first lens disposed above the light source; and a second lens disposed above the first lens. The first lens includes: a lower face including a first convex face projecting towards the light source, and an upper face including a second convex face projecting towards the second lens. In a top view, an area of the second convex face is smaller than an area of the first convex face. At least one of an upper face or a lower of the second lens includes a concave face.
1 . A light emitting module comprising:
a light source;
a first lens disposed above the light source; and
a second lens disposed above the first lens; wherein:
the first lens comprises:
a lower face comprising a first convex face projecting towards the light source, and
an upper face comprising a second convex face projecting towards the second lens;
in a top view, an area of the second convex face is smaller than an area of the first convex face;
a lower face of the second lens comprises a first concave face; and
in a top view, an area of the first concave face is larger than the area of the second convex face.
2 . The light emitting module according to claim 1 , wherein the upper face of the second lens comprises a second concave face.
3 . The light emitting module according to claim 2 , wherein a radius of curvature of the first concave face is smaller than a radius of curvature of the second concave face.
4 . The light emitting module according to claim 2 , wherein, in a top view, an area of the second concave face is larger than an area of the first concave face.
5 . The light emitting module according to claim 1 , further comprising a lens support part disposed outward of the light source in a top view and supporting at least the first lens.
6 . The light emitting module according to claim 5 , wherein:
the lens support part comprises a projected portion on the inner lateral face;
the upper face of the first lens further comprises an outer end part surrounding the second convex face in a top view; and
the first lens is configured to be supported by the lens support part as the outer end part is bonded to a lower face of the projected portion of the lens support part.
7 . The light emitting module according to claim 6 , wherein the lower face of the first lens is exposed from the lens support part.
8 . The light emitting module according to claim 5 , wherein:
the lower face of the second lens comprises an outer end part positioned outward of the first concave face in a top view; and
the outer end part is bonded to an upper face of the lens support part.
9 . The light emitting module according to claim 1 , further comprising a substrate comprising an upper face on which the light source is mounted.
10 . A smart phone or tablet comprising:
a casing, which is a smart phone casing or a tablet casing;
a display part comprising a display screen; and
a light emitting module disposed on a display part side in a top view, the light emitting module comprising:
a light source,
a first lens disposed above the light source, and
a second lens disposed above the first lens, wherein:
the first lens comprises:
a lower face comprising a first convex face projecting towards the light source, and
an upper face comprising a second convex face projecting towards the second lens,
an area of the second convex face is smaller than an area of the first convex face in a top view, and
in a top view, at least one of an upper face or a lower face of the second lens comprises a concave face.
11 . The mobile device according to claim 10 , wherein the upper face of the second lens and the lower face of the second lens each comprise a concave face.
12 . The mobile device according to claim 11 , wherein a radius of curvature of the concave face comprised in the lower face of the second lens is smaller than a radius of curvature of the concave face comprised in the upper face of the second lens.
13 . The mobile device according to claim 11 , wherein, in a top view, an area of the concave face comprised in the upper face of the second lens is larger than an area of the concave face comprised in the lower face of the second lens.
14 . The mobile device according to claim 10 , wherein the light emitting module further comprises a lens support part disposed outward of the light source in a top view and supporting at least the first lens.
15 . The mobile device according to claim 14 , wherein:
the lens support part comprises a projected portion on the inner lateral face;
the upper face of the first lens further comprises an outer end part surrounding the second convex face in a top view; and
the first lens is configured to be supported by the lens support part as the outer end part is bonded to a lower face of the projected portion of the lens support part.
16 . The mobile device according to claim 15 , wherein the lower face of the first lens is exposed from the lens support part.
17 . The mobile device according to claim 14 , wherein:
the lower face of the second lens comprises the concave face and an outer end part positioned outward of the concave face in a top view; and
the outer end part is bonded to an upper face of the lens support part.
18 . The mobile device according to claim 10 , wherein the light emitting module further comprises a substrate comprising an upper face on which the light source is mounted.
19 . A light emitting module comprising:
a light source;
a first lens disposed above the light source; and
a second lens disposed above the first lens; wherein:
the first lens comprises:
a lower face comprising a first convex face projecting towards the light source, and
an upper face comprising a second convex face projecting towards the second lens;
in a top view, an area of the second convex face is smaller than an area of the first convex face; and
a lower face of the second lens comprises a first concave face;
an upper face of the second lens comprises a second concave face; and
a radius of curvature of the first concave face is smaller than a radius of curvature of the second concave face.