Abstract: A lens comprises a base; the base comprising a bottom face having a light incident face adapted to diffuse light into the lens, and a top face; a first member; and a second member, wherein the first and second members extend from the top face and away from the bottom face, wherein the first member comprises a first light emergent face having a convex surface curved outward from the top face, and directs light to areas far away from the lens, and wherein the second member comprises a second light emergent face having a flat surfaced finish and is at a first angle from the top face, and directs light to areas near the lens; and a third light emergent face between the first and the second light emergent faces, wherein the third light emergent face has a rough surface finish, and also directs light to areas near the lens.

Abstract: A lens comprises a base, the base comprising a bottom face facing a light emitting side of a light source, and a top face; a first member comprising a convex part curved outward from a first portion of the top face, and a first light emergent face formed on a top of the convex part; wherein light emitted from the first light emergent face illuminates areas far away from the lens; and a second member connecting to the first member on a second portion of the top face, the second member comprising a second light emergent face; wherein the second light emergent face is at an angle from the top face, the second light emergent face is located at a lower elevation than the first light emergent face in relation to the top face, and light emitted from the second light emergent face illuminates areas near the lens.

Abstract: A light emitting diode (LED) unit having a lens producing parallel light beams is disclosed. The LED unit comprises an LED; and a lens comprising a light incident face facing the LED, a light emergent face away from the LED, and a light reflecting face between the light incident face and the light emergent face; the light incident face comprises a first light incident face over the LED, and a second light incident face encircling the LED; and the light emergent face comprises a first light emergent face corresponding to the first light incident face, and a second light emergent face corresponding to the second light incident face, wherein the first light emergent face, relative to the first light incident face, is lower than the second light emergent face.

Abstract: A light emitting diode chip includes a substrate and an epitaxial layer formed on the substrate. The substrate is made of indium tin oxide (ITO) and has nano hydrogenation of SiC (SiC:H) particles doped therein. The substrate functions as a first electrode for the light emitting diode chip. The epitaxial layer consists of a first conductive type semiconductor material layer, a light-emitting layer and a second conductive type semiconductor material layer. A second electrode is formed on the second conductive type semiconductor material layer.

Abstract: A light emitting diode lamp includes a lamp rack and a light emitting module mounted on the lamp rack. The ling emitting module includes a printed circuit board and a plurality of LEDs attached to the printed circuit board. The LEDs are arranged in an array. Each of the LEDs has a width W. Each of the LEDs spaces from an adjoining LED with a distance D. The width W and the distance D are in the condition that 0.5>W/D>0.15.

Abstract: A light emitting diode (LED) unit having a lens is disclosed. The lens comprises a base, the base comprising a bottom face configured to a light incident face for light entering the lens, and a top face; a first member and a second member, wherein the first and second members curve outward from the top face of the base, wherein the first member comprises a first light emergent face, the first light emergent face has a Fresnel lens surface curved outward from the top face, and light emitted from the first light emergent face illuminates areas far away from the lens, and wherein the second member comprises a second light emergent face, the second light emergent face has a rough surface finish, the second light emergent face is at first angle from the top face, and light emitted from the second light emergent face illuminates areas near the lens.

Abstract: A light emitting diode (LED) unit having a lens is disclosed. The lens comprises a base, the base comprising a bottom face configured to a light incident face for light entering the lens, and a top face; a first member and a second member, wherein the first and second members curve outward from the top face of the base, wherein the first member comprises a first light emergent face, the first light emergent face has a convex surface curved outward from the top face, and light emitted from the first light emergent face illuminates areas far away from the lens, and wherein the second member comprises a second light emergent face, the second light emergent face has a rough surface finish, the second light emergent face is at first angle from the top face, and light emitted from the second light emergent face illuminates areas near the lens.

Abstract: A lens comprises a base; the base comprising a bottom face having a light incident face adapted to diffuse light into the lens, and a top face; a first member; and a second member, wherein the first and second members extend from the top face and away from the bottom face, wherein the first member comprises a first light emergent face having a convex surface curved outward from the top face, and directs light to areas far away from the lens, and wherein the second member comprises a second light emergent face having a flat surfaced finish and is at a first angle from the top face, and directs light to areas near the lens; and a third light emergent face between the first and the second light emergent faces, wherein the third light emergent face has a rough surface finish, and also directs light to areas near the lens.

Abstract: A lens comprises a base, the base comprising a bottom face facing a light emitting side of a light source, and a top face; a first member comprising a convex part curved outward from a first portion of the top face, and a first light emergent face formed on a top of the convex part; wherein light emitted from the first light emergent face illuminates areas far away from the lens; and a second member connecting to the first member on a second portion of the top face, the second member comprising a second light emergent face; wherein the second light emergent face is at an angle from the top face, the second light emergent face is located at a lower elevation than the first light emergent face in relation to the top face, and light emitted from the second light emergent face illuminates areas near the lens.

Abstract: A light emitting diode lamp includes a lamp rack and a light emitting module mounted on the lamp rack. The ling emitting module includes a printed circuit board and a plurality of LEDs attached to the printed circuit board. The LEDs are arranged in an array. Each of the LEDs has a width W. Each of the LEDs spaces from an adjoining LED with a distance D. The width W and the distance D are in the condition that 0.5>W/D>0.15.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a convex, curved surface and is opposite to the light incident surface. The first light emitting surface includes a first border. The first light emitting surface and the light incident surface cooperatively form a convex lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border, and is a convex curved surface. An angle formed between any tangent plane of the second light emitting surface and a plane perpendicular to the optical axis is larger than an angle formed between any tangent plane of the first light emitting surface passing any point on the first border and the plane perpendicular to the optical axis.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a convex curved surface and is opposite to the light incident surface. The first light emitting surface includes a first border. The first light emitting surface and the light incident surface cooperatively form a convex lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border. An angle formed between any tangent plane of the second light emitting surface and a plane perpendicular to the optical axis is larger than an angle formed between any tangent plane of the first light emitting surface passing any point on the first border and the plane perpendicular to the optical axis.

Abstract: A lens includes a light incident surface with a first central axis, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a convex, curved surface with a second central axis and is opposite to the light incident surface; the first light emitting surface comprises a first border. The first light emitting surface and the light incident surface cooperatively forming a convex lens portion. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border. The second light emitting surface is a rough surface for refracting light randomly. The distance between the first central axis and an inner side of the second light emitting surface is larger than the distance between the second central axis and the inner side of the second light emitting surface.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a convex curved surface and is opposite to the light incident surface. The first light emitting surface includes a first border. The first light emitting surface and the light incident surface cooperatively form a convex lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border, and is a flat surface. An angle formed between the second light emitting surface and a plane perpendicular to the optical axis is larger than an angle formed between any tangent plane of the first light emitting surface passing any point on the first border and the plane perpendicular to the optical axis.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a Fresnel surface and opposite to the light incident surface. The first light emitting surface includes a number of concentric annular surfaces and a first border intersecting with some of the concentric annular surfaces. The first light emitting surface and the light incident surface cooperatively form a Fresnel lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border. An angle formed between any tangent plane of the second light emitting surface and a plane perpendicular to the optical axis is smaller than an angle formed between any tangent plane of the concentric annular surfaces passing any point on the first border and the plane perpendicular to the optical axis.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The light incident surface is a concave surface and defines a receiving recess. The first light emitting surface is a convex curved surface and is opposite to the light incident surface. The first light emitting surface includes a first border, and the first light emitting surface and the light incident surface cooperatively form a convex lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface and adjacent to the first border. The longer the distance between a point of the second light emitting surface and the optical axis is, the longer the distance between the point and the light incident surface is.

Abstract: A lens includes a light incident surface, a first light emitting surface, and a second light emitting surface. The first light emitting surface is a convex, curved surface and opposite to the light incident surface. The first light emitting surface includes a first border; the first light emitting surface and the light incident surface cooperatively form a convex lens portion with an optical axis. The second light emitting surface is located at a side of the first light emitting surface adjacent to the first border, and the second light emitting surface is a rough surface for refracting light randomly.

Abstract: An exemplary rigid printed circuit board (PCB) includes a main portion, a supporting portion and a connecting portion. The supporting portion is for supporting electrical elements. The connecting portion includes two end portions and a main body therebetween. The main body is spaced from the main portion and the supporting portion. The two end portions are respectively connected to the main portion and the supporting portion. A PCB assembly and a PCB module using the same are also provided.