Touch-sensitive illuminating display
AssigneeHewlett-Packard Development Company, L.P.
InventorsJarrid Wittkopf, Robert Ionescu, Ning Ge, Helen A Holder
Life of this patent
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Abstract
In an example implementation, a touch-sensitive illuminating display includes a transparent flexible touch layer, a transparent top conductive layer adjacent the flexible touch layer, a bottom conductive layer, and an electroluminescent layer and variable-thickness dielectric layer sandwiched between the top and bottom conductive layers. Pressure against the flexible touch layer is to reduce the dielectric layer thickness and bring the top and bottom conductive layers closer together, causing the electroluminescent layer to emit light where the pressure is applied.
Claims14
A touch-sensitive illuminating display comprising:
- a transparent flexible touch layer;
- a transparent top conductive layer below and adjacent the flexible touch layer and whose entire surface is conductive;
- a bottom conductive layer whose entire surface is conductive;
- an electroluminescent layer and a variable-thickness compressible dielectric layer sandwiched between the top and bottom conductive layers;
- and,
- a compression time control adhesive applied to the electroluminescent layer and one of the conductive layers to control an amount of time the dielectric layer remains compressed after pressure is applied against the flexible touch layer.
A touch-sensitive illuminating display comprising:
- an electroluminescent layer between a top conductive layer and a bottom conductive layer;
- a current source to provide current through the top and bottom conductive layers to generate an electric field;
- a transparent flexible touch layer to receive contact pressure;
- a compressible touch-sensitive dielectric layer adjacent to the electroluminescent layer to increase the electric field strength in response to the contact pressure and to cause the electroluminescent layer to emit light in areas of the increased electric field strength where the contact pressure is applied;
- and,
- a compression time control adhesive applied to the electroluminescent layer and one of the conductive layers to control an amount of time the dielectric layer remains compressed after the contact pressure is applied against the flexible touch layer.
A method of forming a touch-sensitive illuminating display comprising:
- applying conductive material onto a substrate forming a lower conductive layer whose entire surface is conductive;
- applying an electroluminescent layer over and adjacent to the lower conductive layer;
- applying a touch-sensitive dielectric layer over and adjacent to the electroluminescent layer;
- applying over and adjacent to the touch-sensitive dielectric layer, an upper conductive layer whose entire surface is conductive;
- applying a flexible touch-sensitive layer over and adjacent to the upper conductive layer;
- applying a first component of an epoxy to the electroluminescent layer;
- and,
- applying a second component of an epoxy to the touch-sensitive dielectric layer;
- wherein upon application of contact pressure to the flexible touch-sensitive layer, the first and second components activate and comprise a compression time control adhesive to control an amount of time the dielectric layer remains compressed after the contact pressure is applied against the flexible touch layer.
Dependencies are inferred from the claim text.