Backlight source device

Details Backlight source device Backlight source device

1999-03-23

2000-12-26

O'Shea, Sandra

Illumination

Revolving

362330, 362355, F21V 704

Patent

active

061647918

ABSTRACT:
A backlight source device including a transparent light guiding plate, a diffusing piece on the transparent light guiding plate, a reflecting piece below the transparent light guiding plate and a lateral light source. Diffusing units are installed on either a front surface or a rear surface of the transparent light guiding plate. The diffusing units have respective light guiding surfaces with different areas which are extendedly and continuously arranged. The light reflected on the diffusing units by the lateral light source becomes substantially uniform such that light and dark regions of a backlight source device can be avoided. The light guiding surfaces of the backlight source device can be formed such that different illuminations of emitted light are easily formed and illuminated.

REFERENCES:
patent: 5461547 (1995-10-01), Ciupke
patent: 5485354 (1996-01-01), Ciupke
patent: 5575549 (1996-11-01), Ishikawa
patent: 5718497 (1998-02-01), Yokoyama
patent: 5779337 (1998-07-01), Saito

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