Patent · US Active

Optical element and backlight module having the same

US7922367B2 · kind B2 · utility

1Cited by

5References

20Claims

0Family size

Assignee

Hong Kong Applied Science and Technology Research Institute Company Limited · CN

Inventor

Ying Liu · Beijing, CN

Key dates

Filing date	Aug 8, 2008
Grant date	Apr 12, 2011
Priority date	—
Expiry date	Apr 15, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/133603
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An optical element, a light-emitting component and a direct-lit backlight module having the optical element are provided. The optical element includes a bottom surface, at least one side refractive surface for refracting one part of a light beam incident from the bottom surface, and an upper refractive surface for refracting the other part of the light beam incident from the bottom surface. A maximum included angle formed between the light beam incident from the bottom surface and to be irradiated onto the side refractive surface and the bottom surface is a first angle (α). An included angle formed between a light beam coming out from at least one side refractive surface and the bottom surface is smaller than or equal to the first angle. A maximum included angle formed between the light beam incident from the bottom surface and to be irradiated onto the upper refractive surface and a central axis of the optical element is a second angle (β). An included angle formed between the light beam coming out from the upper refractive surface and the central axis of the optical element is greater than or equal to the second angle.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.