Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Patent
1987-09-08
1989-08-01
DeMeo, Palmer C.
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
313512, 313114, 313116, 313117, H01L 3300
Patent
active
048535931
ABSTRACT:
Light emitting diode (LED) display devices having several luminous segments are disposed inside a transparent front support plate and each of a plurality of light emission diodes is associated with one of the respective luminous segment via a light conducting segment. This display device requires little space, is easy and cost-effective to manufacture, and permits great design flexibility in order to make possible an expansion of its area of use. The invention provides to this end that the light conducting segment is formed in the region of the respective luminous segment as a quasi planar light guide structure for the distribution of the light emitted by the respective light emission diode in the region of the luminous segment. The light emitting diode display device in accordance with the invention is suitable as a LED display for numerals and/or symbols.
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M. George Craford; "Recent Developments in Light-Emitting-Diode Technology"; 7/7/77; IEEE Transactions on Electron Devices; pp. 935-943.
DeMeo Palmer C.
Moran John F.
Siemens Aktiengesellschaft
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