Lens for light-emitting diode, backlight unit and display device including same

摘要

The present invention relates to a lens for a light-emitting diode, and to a backlight unit and display device including same, and more particularly, to a lens for a light-emitting diode (LED), which is disposed on the LED to uniformly diffuse the light emitted from the LED and which is reduced in overall volume as well as in luminance deviation in the vicinity of the optic axis of the LED due to Fresnel reflection, and to a backlight unit (BLU) and display device including same.

主权项

1. A lens for a light emitting diode (LED) for uniformly distributing light emitted from an LED, the lens comprising:
a bottom surface comprising an incident surface on which light emitted from the LED is incident, a top surface emitting the light incident on the incident surface from the lens, and a lateral surface connecting the bottom surface and the top surface, wherein the lateral surface comprises: a plurality of refractive surfaces refracting and emitting first light that is incident on the incident surface and is further incident directly on the lateral surface, the first light being emitted toward an outside of the lens through the refractive surfaces; and a plurality of connection surfaces disposed between the refractive surfaces for connecting the refractive surfaces and emitting second light that is incident on the incident surface, is Fresnel-reflected at the top surface, and is incident on the lateral surface, the second light being emitted toward the outside the lens through the connection surfaces, and wherein the refractive surfaces curve outward.