Electroluminescent displays
AssigneePelikon Limited
InventorChristopher Miles Evans
Life of this patent
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Abstract
An electroluminescent display comprising a mask (13) defining the information to be displayed mounted in front of an electroluminescent (EL) material backlight (16). The mask (13) comprises a layer of liquid crystal vesticles (14) encapsulated in a curable polymer matrix (15), where the polymer chains of the polymer matrix (15) have been cross-linked by exposure to radiation. Preferably the polymer matrix is a UV curable polyurethane. The invention also concerns a method of making such a display.
Claims28
An electroluminescent display comprising a mask defining the information to be displayed mounted in front of an electroluminescent (EL) material backlight, the mask comprising a layer of liquid crystal vesicles encapsulated in a radiation curable polymer matrix, wherein polymer chains of the polymer matrix have been cross-linked by exposure to radiation.
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A method of manufacturing a display comprising the steps of:
- forming a mask defining the information to be displayed in front of the electroluminescent display by coating a substrate with a layer of liquid crystal vesicles encapsulated in a radiation curable polymer matrix and exposing the polymer matrix to radiation to cause cross-linking of the polymer chains of the polymer matrix;
- and
- forming an electroluminescent layer behind the mask.
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An electroluminescent display comprising a mask defining the information to be displayed mounted in front of an electroluminescent (EL) material backlight, the mask comprising a layer of liquid crystal material dispersed in a polyurethane matrix.
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Dependencies are inferred from the claim text.