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US 8,009,263 B2Granted
Bistable display
AssigneeIndustrial Technology Research Institute
InventorsXiang-Dong Mi, Stanley W. Stephenson, III
Life of this patent
Estimating the term…
Abstract
A bistable display having one or more permanent hideable mark, and a method of forming the permanent hideable mark, are described. The permanent hideable mark can be hidden and revealed numerous times without loss of information.
Claims16
A method of forming a permanent hideable mark on a bistable display, comprising:
- forming a bistable display comprising a substrate and a layer of bistable material on the substrate;
- and
- forming an imagewise pattern in the layer of bistable material, such that the imagewise pattern is viewable in a first state of the bistable material, hidden in a second state of the bistable material, and is not erasable,
- wherein forming the imagewise pattern in the layer of bistable material comprises forming areas of bistable material and areas of a filling material between the areas of bistable material, such that either the areas of bistable material or the areas of filling material form the imagewise pattern, and
- wherein the filling material comprises a second bistable material.
2 more elements
A method of forming a permanent hideable mark on a bistable display, comprising:
- forming a bistable display comprising a substrate and a layer of bistable material on the substrate;
- and
- forming an imagewise pattern in the layer of bistable material by applying a first amount of energy in an imagewise pattern to the layer of bistable material to form the pattern, such that the imagewise pattern is viewable in a first state of the bistable material, hidden in a second state of the bistable material, and is not erasable, wherein the energy is heat wherein the filling material comprises a second bistable material.
Dependencies are inferred from the claim text.