Lighting device, liquid crystal display device and electronic eq

Details Lighting device, liquid crystal display device and electronic eq Lighting device, liquid crystal display device and electronic eq

1998-03-17

2000-05-23

O'Shea, Sandra

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362 27, 362800, 362 31, 362335, G01D 1128

Patent

active

060658452

ABSTRACT:
A lighting device includes light-emitting diodes 18 for emitting light, a light guide 16 for introducing the light from the light-emitting diodes 18 and emitting the light from a light-emitting surface 16a, lenses 21 provided on the end of the light guide 16 opposed to the light-emitting diodes 18. Concerning the curved shape of each lens 21, the size or shape of the curving is set so that light-emitting limits Lb from two adjacent light-emitting diodes 18, 18 intersect on the peripheral line of an effective light-emitting region Ah on the light-emitting surface 16a. Accordingly, the effective light-emitting region in the light guide totally emits light at uniform intensity.

REFERENCES:
patent: 5479275 (1995-12-01), Abileah
patent: 5816677 (1998-10-01), Kurematsu et al.

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