Panel light source device and display comprising it

Details Panel light source device and display comprising it Panel light source device and display comprising it

1998-09-03

2000-07-11

O'Shea, Sandra

Illumination

Revolving

362 19, 362263, 362331, 349 65, F21V 500

Patent

active

060862122

ABSTRACT:
Provided is a panel light source device through which the light availability is increased. The luminance of light to be outputted by the device in the oblique direction that oversteps the front direction of the device is reduced. The device comprises a light source 2, a reflector 8, a waveguide 3 that receives through its side surfaces the light having been outputted by the light source 2 and reflected by the reflector 8, an output light modulator 6 as provided on the light output surface of the waveguide 3 to modulate the output light from the light output surface of the waveguide 3 toward the front direction of the light output surface, and an input light modulator 9 as provide between the light source 2 and the side surface of the waveguide 3 to modulate the output light from the light source 2 toward the light output surface of the waveguide 3 or toward the back surface of the waveguide 3 opposite to the light output surface thereof.

REFERENCES:
patent: 5775799 (1998-07-01), Forkner
patent: 5776636 (1998-07-01), Kunisawa et al.
patent: 5838403 (1998-11-01), Jannson et al.

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