Title: Light emitting device mounting arrangement

Abstract: A mounting scheme designed to provide enhanced brightness and off-axis viewing of a discrete light emitting device is described. The device is placed within a cavity with reflecting side walls. Situated above the cavity is a contrast filter which has formed therein a plurality of spherical lenses. The lens arrangement is designed to produce an array of discrete images of the device separated by dark areas in order to increase the visibility of the device. The cavity side walls reflect onto the lenses light which would not normally be incident thereon thereby further enhancing visibility and permitting good off-axis viewing.

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Inventors: Dufft, William Henry (Shillington, PA, US)

Application Number: 625022
Filing Date: 1975-10-23
Publication_date: 1977-03-22
Assignee: Bell Telephone Laboratories, Incorporated (Murray Hill, NJ)
Primary Class(es): 313/499 257/98, 257/99, 257/100, 313/112, 313/512, 359/619, 362/800
Other Classes:
US Patent Ref:

3512027	May, 1970	Kupsky	313/108.
3555335	Jan, 1971	Johnson	313/499.
3739217	Jun, 1973	Bergh et al.	313/108.
3764862	Oct, 1973	Jankowski	313/499.
3780357	Dec, 1973	Haitz	317/234.
3786499	Jan, 1974	Jankowski et al.	340/378.
3816847	Jun, 1974	Nagao	357/17.
3821590	Jun, 1974	Kosman	313/499.
3863075	Jan, 1975	Ironmonger	313/499.
3876900	Apr, 1975	Amatsuka	313/510.

Other Refs:
Primary Examiner: Kominski, John
Assistant Examiner:
Attorney: Birnbaum; Lester H.