US 2014/0153223 A1 · LED UNIT AND DISPLAY INCOPORATING THE SAME

Abstract

An LCD module includes a screen, a light diffusion plate, a lens and an LED. The lens covers the LED. The lens includes a main body having a bottom face and a top face opposite to the bottom face. The bottom face of the main body defines a cavity to receive the LED. The top face of the main body forms a plurality of concentric annuluses thereon. Each annulus has a first face perpendicular to the top face of the main body, and a second face inclined relative to the top face of the main body, to thereby diverge a part of light from the LED and into the lens. A central area of the top face of the main body is surrounded by an innermost annulus, and forms a rough face for diffusion another part of the light from the LED into the lens.

Claims18

Dependent claims

An LED (light emitting diode) unit for illuminating a screen of an LCD module via a diffusion plate, comprising:

an LED;
and
a lens covering the LED, the lens comprising a main body having a top face configured for facing the diffusion plate and a bottom face facing the LED, a plurality of annuluses being formed on the top face of the main body, each of the annuluses having a first face non-parallel to the top face of the main body and a second face inclined relative to the top face of the main body, an area of the top face of the main body surrounded by an innermost annulus being a rough face;
wherein light emitted from the LED with a large emergent angle is diverged by the annuluses, and light emitted from the LED with a small emergent angle is diffused by the rough face, whereby the light emitted from the LED obtains a uniform light distribution.

1 more element

Dependencies are inferred from the claim text.

Led unit and display incoporating the same

Life of this patent

Led unit and display incoporating the same

Life of this patent

Abstract

Claims18