Illumination package
View Patent ↗An illumination package is disclosed in the invention. The illumination package includes an optical element, package base, and a light emitter. The optical element is designed to redirect a majority of light emitted from the light emitter to a direction approximately perpendicular to a longitudinal axis of the optical element. In one embodiment, the optical element includes an flared portion and a base portion. The flared portion is constructed by an upper surface forming a recess, a side surface adjacent to the upper surface and curved, and a lower surface connecting to the base portion. In another embodiment, a concave lens is formed on the upper surface.
1. An optical element comprised of a light-pervious material, comprising:
an upper surface formed by a refractive index interface to reflect light from a light emitter and forming a recess on said light-pervious material;
a bottom surface opposite to said recess and through which light enters into said light-pervious material; and
a side surface curved to be adjacent to an edge of said upper surface for directing a portion of the light to a side of said optical element, said side surface facing upward;
wherein said side surface is formed as a concaved surface.
2. The optical element of claim 1 , wherein said upper surface is formed as a curved surface.
3. The optical element of claim 1 , wherein said upper surface is formed with a radius increasing outward from a deepest portion of said recess.
4. The optical element of claim 1 , wherein said recess is formed as a vortex shape having an apex.
5. The optical element of claim 1 , wherein said side surface is obliquely angled with respect to a longitudinal axis substantially perpendicular to said bottom surface.
6. The optical element of claim 1 , wherein said upper surface and said side surface are radially symmetric about a longitudinal axis passing through the optical element.
7. The optical element of claim 1 , wherein said upper surface and said side surface are bilaterally symmetric about a longitudinal plane passing through the optical element.
8. The optical element of claim 1 , wherein said refractive index interface is formed between materials having different refractive indexes.
9. The optical element of claim 8 , wherein a difference between the refractive indexes of the materials ranges between 0.45 and 0.5.
10. The optical element of claim 1 , wherein said upper surface is formed as a ripply surface.
11. The optical element of claim 1 , wherein a convex lens is formed on said upper surface.
12. The optical element of claim 11 , wherein a radius of said convex lens is formed between 50 μm˜60 μm.
13. The optical element of claim 1 , wherein said light emitter is selected from the group consisting of a light emitting diode, laser diode, an incandescent lamp, a fluorescent tube, and a Cold Cathode Fluorescent Lamp.
14. The optical element of claim 1 , wherein said light-pervious material is selected from the group consisting of acrylic resin, COC, PMMA, PC, PC/PMMA, Polyetherimide (PEI), fluorocarbon polymer, and silicone.
15. An optical element comprised of a light-pervious material, comprising:
an upper surface formed by a refractive index interface to reflect light from a light emitter and forming a recess on said light-pervious material;
a bottom surface opposite to said recess and through which light enters into said light-pervious material;
a side surface curved to be adjacent to an edge of said upper surface for directing a portion of the light to a side of said optical element, said side surface facing upward; and
a cavity for accommodating said light emitter;
wherein said cavity is formed as a cone shape or a pyramid shape.
16. An optical element comprised of a light-pervious material comprising:
an upper surface formed by a refractive index interface to reflect light from a light emitter and forming a recess on said light-pervious material;
a bottom surface opposite to said recess and through which light enters into said light-pervious material;
a side surface curved to be adjacent to an edge of said upper surface for directing a portion of the light to a side of said optical element, said side surface facing upward;
a lower surface adjacent to said side surface; and
a base portion disposed below said upper surface, said side surface, and said lower surface;
wherein said base portion has an inclined terrace.
17. The optical element of claim 16 , further comprising:
a concaved surface formed between said lower surface and said base portion.