Display system having electroluminescent devices

Details Display system having electroluminescent devices Display system having electroluminescent devices

1996-02-08

1998-10-13

Lazarus, Ira S.

Illumination

Light source or light source support and luminescent material

362 23, 362 27, 362 29, 362326, 362800, F21V 1300, G01D 1128

Patent

active

058202463

ABSTRACT:
An improved display system includes a plurality of light sources which are electroluminescent devices, such as light emitting diodes. The light emitting diodes have an intensity of 0.5 with a light dispersion angle of 24.degree. or less. An optical device creates a plurality of dispersion patterns from the light emitted by each of the light emitting diodes. The dispersion patterns have a viewing angle of 50.degree. or more. The optical device includes a plurality of linear grooves having side surfaces which cooperate to create a plurality of separate dispersion patterns from the light emitted by each light emitting diode. The dispersion patterns from the light emitted by one light emitting diode are disposed along a line which extends perpendicular to the longitudinal axes of the grooves. The longitudinal axes of the grooves may extend transverse to sides of a rectangular array of light emitting diodes to minimize overlapping of the dispersion patterns and maximize the uniformity with which light is transmitted from the optical device to an outer side of a display panel.

REFERENCES:
patent: 4975807 (1990-12-01), Ohashi
patent: 5039832 (1991-08-01), Polacek et al.
patent: 5101326 (1992-03-01), Roney
patent: 5150257 (1992-09-01), Mohabbatizadeh et al.
patent: 5295050 (1994-03-01), Helstern et al.
patent: 5515253 (1996-05-01), Sjobom
patent: 5544019 (1996-08-01), Tatavoosian et al.

Affiliated with

Also associated with

Rating

Display system having electroluminescent devices does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Display system having electroluminescent devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display system having electroluminescent devices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-306752