Direct-illumination backlight apparatus having transparent...

Illumination – Illuminated scale or dial – Internal light source

Reexamination Certificate

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Details

C362S027000, C362S029000

Reexamination Certificate

active

11136529

ABSTRACT:
A direct-illumination backlight apparatus using LEDs includes a flat reflective plate, an LED light source, a transparent plate, a scattering pattern, and a light guide. The light guide serves to introduce a partial light from an LED light source at such an angle that the partial light is trapped inside the transparent plate, and the scattering pattern serves to scatter the trapped light beam at a position directly above the LED light source so that the scattered light beam escapes out of the transparent plate toward an LCD panel.

REFERENCES:
patent: 6561663 (2003-05-01), Adachi et al.
patent: 6989873 (2006-01-01), Hua-Nan et al.
patent: 2003/0117790 (2003-06-01), Lee et al.

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