Multilayer with radiation absorber and touch screen
AssigneeEastman Kodak Company
InventorsCharles C. Anderson, Ronald S. Cok, Rodney D. Feldman
Life of this patent
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Abstract
Disclosed is a transparent multilayer comprising (a) a first conductive layer containing an intrinsically conductive polymer and a film forming binder, (b) a second conductive layer, and (c) spacer elements separating the first and second conductive layers, the first conductive layer further comprising an actinic radiation absorbing compound. The film is useful as a component in a touch screen display.
Claims36
A transparent multilayer comprising (a) a first conductive layer containing an intrinsically conductive polymer and a film forming binder, (b) a second conductive layer, and (c) spacer elements separating the first and second conductive layers, the first conductive layer further comprising an actinic radiation absorbing compound.
A touch screen, comprising;
- a) a transparent substrate having a first conductive layer;
- b) a flexible transparent cover sheet having a second conductive layer on the surface and located relative to the transparent substrate so that the first and second conductive layers face each other;
- and
- c) spacer elements located between said conductive layers to prevent contact in the absence of external deformation;
- wherein at least one of the first or second conductive layers comprises an intrinsically conductive polymer and a film forming binder, the layer further comprising a compound capable of absorbing actinic radiation.
23 A display device of claim 21 wherein the transparent substrate is also a cover of the OLED that emits light through the transparent OLED cover.
A method of making a multilayer useful for a touch screen display of the type including a transparent substrate bearing a conductive layer, a flexible transparent cover sheet bearing a conductive layer, and spacer elements located between the substrate and the cover sheet, comprising the steps of:
- a) providing a liquid coating medium containing an intrinsically conductive polymer, a film forming binder, and a compound capable of absorbing actinic radiation;
- b) coating the liquid coating medium on the substrate or the cover sheet and drying the coating to form a first conductive layer,
- c) providing a second conductive layer on the other of the substrate or cover sheet, and
- d) joining the substrate and cover sheet with their conductive layers facing each other and with spacer elements there-between.
Dependencies are inferred from the claim text.