Light-Emitting Device With Partial Roughened Illumination Surface
In one embodiment, a light-emitting device having a reflector, an emitter and an encapsulant is disclosed. The encapsulant may have a plurality of optical structures. Each of the plurality of optical structures may be configured to attenuate light transmitting towards a first direction by re-directing towards a second direction. In another embodiment, a flashlight having a roughened area with micro-optics is disclosed. Each of the micro-optics is configured to redirect light transmitting towards a direction forming an angle relative to a longitudinal axis to a point along the longitudinal axis. In yet another embodiment, a lighting-emitting device having roughened area to reduce light along a longitudinal axis is disclosed.
1 . A light-emitting device, comprising:
a reflector surface;
an emitter attached on the reflector surface, the emitter being configured to emit light towards an illumination direction;
an encapsulant encapsulating the emitter on the reflector surface;
an illumination surface of the encapsulant being distanced away from the reflector surface; and
a plurality of optical structures formed on at least a portion of the encapsulant,
wherein each of the plurality of optical structures is configured to attenuate light transmitting towards a first direction by redirecting the light towards a second direction respectively.
2 . The light-emitting device of claim 1 , wherein the plurality of optical structures is configured such that the first direction forms an angle of less than ninety degrees relative to the illumination direction.
3 . The light-emitting device of claim 1 , wherein the plurality of optical structures is configured such that the second direction forms an angle of less than ninety degrees relative to the illumination direction.
4 . The light-emitting device of claim 1 , wherein the plurality of optical structures are micro-optics with feature height substantially smaller than five microns.
5 . The light-emitting device of claim 1 , wherein the plurality of optical structures extends planarly on the illumination surface in an asymmetrical manner.
6 . The light-emitting device of claim 1 , wherein the at least a portion of the illumination surface where the plurality of optical structures are formed is approximately less than half of the illumination surface.
7 . The light-emitting device of claim 1 , wherein when the light-emitting device is in a vertical arrangement such that the illumination surface extends substantially vertically relative to a horizontal axis, the portion of the illumination surface above the horizontal axis comprises the plurality of optical structures.
8 . The light-emitting device of claim 7 , wherein when the light-emitting device is in the vertical arrangement such that the illumination surface extends vertically relative to the horizontal axis, the portion of the illumination surface below the horizontal axis comprises a smooth surface.
9 . The light-emitting device of claim 8 , wherein when the light-emitting device is in the vertical arrangement such that the illumination surface extends vertically relative to the horizontal axis, the plurality of optical structures are configured to concentrate light towards a direction below the horizontal axis.
10 . The light-emitting device of claim 1 , wherein each of the plurality of optical structures are shaped in accordance to distance from the emitter.
11 . The light-emitting device of claim 1 forms a portion of an electronic display system, wherein the electronic display system comprises at least one additional light-emitting device, wherein the light-emitting device and the at least one additional light-emitting device are arranged in a similar manner so as to attenuate light transmitted towards the first direction by redirecting the light towards the second direction.
12 . A flashlight, comprising:
an emitter configured to emit light;
a reflector configured to direct light towards an illumination direction;
an encapsulant encapsulating the emitter and at least partially the reflector;
an illumination surface of the encapsulant facing the illumination direction; and
a roughened area of the illumination surface comprising a plurality of micro-optics,
wherein each of the micro-optics is configured to attenuate light directed towards a first direction forming an angle from the illumination direction by redirecting the light towards the illumination direction.
13 . The flashlight of claim 12 , wherein the encapsulant comprises a lens portion having the roughened area.
14 . The flashlight of claim 13 , wherein the roughened area is substantially circular in shape.
15 . The flashlight of claim 14 , wherein the roughened area and the lens portion are substantially co-axially aligned.
16 . The flashlight of claim 12 , wherein the flashlight extends along a longitudinal axis, and wherein the roughened area and the plurality of micro-optics are configured to redirect light such that maximum concentration of light are redirected by the plurality of micro-optics substantially along the longitudinal axis.
17 . The flashlight of claim 12 forms a portion of light communicating system of a seaport.
18 . A light-emitting device, comprising an emitter configured to emit light;
a reflector configured to direct light towards an illumination direction;
an encapsulant encapsulating the emitter and at least partially the reflector;
an illumination surface of the encapsulant facing the illumination direction; and
a roughened area of the illumination surface comprising a plurality of micro-optics approximating the emitter,
wherein the emitter and the roughened area are formed substantially along a longitudinal axis; and
wherein each of the micro-optics is configured to attenuate light directed towards the longitudinal axis by redirecting the light towards a direction forming an angle from the longitudinal axis respectively.
19 . The light-emitting device of claim 18 , wherein the roughened area is formed in a substantially circular shape with the longitudinal axis located at a central region of the circular shape, and wherein the illumination surface comprises a substantially smooth surface surrounding the roughened area.
20 . The light-emitting device of claim 18 , wherein the light-emitting device forms a portion of tail lamp of a vehicle.