Dish lens for backlight module and light emitting diode

Details Dish lens for backlight module and light emitting diode Dish lens for backlight module and light emitting diode

2006-10-03

2006-10-03

Luebke, Renee (Department: 2875)

Illumination

Edge lighted panel

Light modifier with emission face combined with light guide...

C362S606000, C362S609000, C362S327000, C359S707000, C359S599000

Reexamination Certificate

active

07114838

ABSTRACT:
The backlight module includes a reflective sheet, at least one point light unit with a dish lens on the reflective sheet. The dish lens has a light-permeable surface formed on the bottom of the dish lens, a light-reflecting surface formed on top of the dish lens, two smooth curve surfaces formed on two side of the dish lens for connecting the light-reflecting surface and the light-permeable surface, and a light-scattering surface on the center of the light-reflecting surface. The profile of the light-permeable surface and the light-reflecting surface are a substantially concave shape. The profile of the light-scattering surface is a substantially convex shape. A light emitting diode (LED) device includes a light emitting semiconductor device and a dish lens encapsulating the light emitting semiconductor device. The dish lens allows the light beams emitted by the LED to diffuse more uniformly, resulting in a more uniform backlight emission.

REFERENCES:
patent: 2215900 (1940-09-01), Bitner
patent: 2254962 (1941-09-01), Harris et al.
patent: 5894196 (1999-04-01), McDermott
patent: 6679621 (2004-01-01), West et al.
patent: 6724543 (2004-04-01), Chinniah et al.
patent: 7033061 (2006-04-01), Wu
patent: 2004/0165273 (2004-08-01), Kuo

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