Fluorescently activated display device with improved sensitivity
AssigneeSiemens Aktiengesellschaft
InventorsHeinz Pape, Ferdinand Quella, Hans Krueger
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Abstract
An electro-optical display device has a fluorescently activated plate disposed in front of a passive display in the line of sight of a viewer. The entire surface of the fluorescently activated plate is uncovered and is available for collecting ambient light to provide an image of increased intensity and allowing the device to be utilized in environments having low optical radiation levels. The fluorescently activated plate has exit windows thereon for retransmitting the light as controlled by the switchable regions of the passive display in a designated pattern to a viewer.
Claims40
A device for the optical display of information with improved sensitivity and intensity comprising:
- a plate consisting of a material with an index of refraction greater than 1 and which contains fluorescent particles for collection of light radiation impinging on said plate by means of fluorescent scattering;
- a passive display having regions controllably switchable between a light absorbing and a light reflective state, said passive display disposed behind said plate in the line of sight of a viewer;
- and
- a coupling means for coupling selected areas of said plate and said passive display to allow transmission of light in selected patterns to a viewer.
Dependencies are inferred from the claim text.