Illumination lens for short-throw lighting
DCFirst Claim
1. An illumination lens, comprising:
- a light incident surface that defines a cavity having rotational symmetry with respect to a central axis, the light incident surface configured to receive light from an underlying light emitting element;
a light exiting surface comprising a flat surface intersecting the central axis and a convex surface extended from the flat surface toward a side portion; and
a bottom surface connecting the light incident surface and the light exiting surface, wherein;
an uppermost part of the light exiting surface has an infinite intersecting point with a horizontal axis vertical to the central axis in a cross-sectional view;
a lowermost part of the bottom surface has two intersecting points with the horizontal axis in the cross-sectional view; and
the bottom surface comprises an inclined surface having an angle formed by the bottom surface with respect to the horizontal axis.
0 Assignments
Litigations
1 Petition
Accused Products
Abstract
An illumination lens includes a light incident surface that defines a cavity and has a flat top surface and lateral flanks, the light incident surface configured to receive light from an underlying light emitting element, a light exiting surface having a central indentation and surrounding toroid, and a bottom surface connecting the light incident surface and the light exiting surface. The lateral flank includes a first region extending from the top surface and a second region extended from the first region, the second region is a curved surface, of which the center of the curvature thereof lies on the illumination lens, an intersection of the second region and a horizontal optical axis forms a first point, and the first point is disposed lower than a second point where the bottom surface and the light exiting surface intersect.
-
Citations
11 Claims
-
1. An illumination lens, comprising:
-
a light incident surface that defines a cavity having rotational symmetry with respect to a central axis, the light incident surface configured to receive light from an underlying light emitting element; a light exiting surface comprising a flat surface intersecting the central axis and a convex surface extended from the flat surface toward a side portion; and a bottom surface connecting the light incident surface and the light exiting surface, wherein; an uppermost part of the light exiting surface has an infinite intersecting point with a horizontal axis vertical to the central axis in a cross-sectional view; a lowermost part of the bottom surface has two intersecting points with the horizontal axis in the cross-sectional view; and the bottom surface comprises an inclined surface having an angle formed by the bottom surface with respect to the horizontal axis. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An illumination lens, comprising:
-
a light incident surface that defines a cavity having rotational symmetry with respect to a central axis, the light incident surface configured to receive light from an underlying light emitting element; a light exiting surface comprising a flat surface intersecting the central axis and a convex surface extended from the flat surface toward a side portion; a bottom surface connecting the light incident surface and the light exiting surface; and at least one peg disposed on a rim of the bottom surface, wherein; an uppermost part of the light exiting surface has an infinite intersecting point with a horizontal axis vertical to the central axis in a cross-sectional view; and a lowermost part of the bottom surface has two intersecting points with the horizontal axis in the cross-sectional view.
-
-
8. A light emitting device, comprising:
-
a light emitting element disposed on a printed circuit board; and an illumination lens, comprising; a light incident surface that defines a cavity having rotational symmetry with respect to a central axis, the light incident surface configured to receive light from the light emitting element; a light exiting surface comprising a flat surface intersecting the central axis and a convex surface extended from the flat surface toward a side portion; and a bottom surface connecting the light incident surface and the light exiting surface, wherein; an uppermost part of the light exiting surface has an infinite intersecting point with a horizontal axis vertical to the central axis in a cross-sectional view; and a lowermost part of the bottom surface has two intersecting points with the horizontal axis in the cross-sectional view, wherein an upper surface of the printed circuit board comprises an absorptive material. - View Dependent Claims (9)
-
-
10. A light emitting device, comprising:
-
a light emitting element disposed on a printed circuit board; and an illumination lens, comprising; a light incident surface that defines a cavity having rotational symmetry with respect to a central axis, the light incident surface configured to receive light from the light emitting element; a light exiting surface comprising a flat surface intersecting the central axis and a convex surface extended from the flat surface toward a side portion; and a bottom surface connecting the light incident surface and the light exiting surface, wherein; an uppermost part of the light exiting surface has an infinite intersecting point with a horizontal axis vertical to the central axis in a cross-sectional view; and a lowermost part of the bottom surface has two intersecting points with the horizontal axis in the cross-sectional view; and an absorptive material disposed between the bottom surface and the printed circuit board. - View Dependent Claims (11)
-
Specification