Transparent strain sensitive devices and method
First Claim
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1. A strain sensitive device providing, 3-axis strain sensing, comprising one translucent or transparent electrical insulator substrate, said one substrate comprising a first major surface having at least a first region and a second region;
- a conductor array comprising translucent or transparent thin film electrical conductors formed on the first region but not on the second region of the first major surface of said one substrate, the conductors being deflectable when a force is applied to as well as when a force is applied to the first region or the second region of said substrate to thereby produce an electrical resistance or resistivity in said conductors proportional to strain in said conductors as a result of the force applied to the first region or the second region; and
sensing means connected to said conductors on the first major surface on said one substrate and responsive to the strain-induced electrical resistance or resistivity change in said conductors for determining the xy location and amplitude of the applied force in the first or second region.
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Abstract
A transparent strain sensitive surface is disclosed which is suitable for strain gages, video terminal touch panels, security panels (windows, display cases, etc.). The strain gage includes a transparent, strain sensitive conductor of indium tin oxide (ITO) or indium oxide (IO) on a transparent substrate. The strain sensitive panels include a crossed xy matrix of transparent IO or ITO strain sensitive conductors formed on the same side or on opposite sides of a transparent substrate.
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14 Claims
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1. A strain sensitive device providing, 3-axis strain sensing, comprising one translucent or transparent electrical insulator substrate, said one substrate comprising a first major surface having at least a first region and a second region;
- a conductor array comprising translucent or transparent thin film electrical conductors formed on the first region but not on the second region of the first major surface of said one substrate, the conductors being deflectable when a force is applied to as well as when a force is applied to the first region or the second region of said substrate to thereby produce an electrical resistance or resistivity in said conductors proportional to strain in said conductors as a result of the force applied to the first region or the second region; and
sensing means connected to said conductors on the first major surface on said one substrate and responsive to the strain-induced electrical resistance or resistivity change in said conductors for determining the xy location and amplitude of the applied force in the first or second region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- a conductor array comprising translucent or transparent thin film electrical conductors formed on the first region but not on the second region of the first major surface of said one substrate, the conductors being deflectable when a force is applied to as well as when a force is applied to the first region or the second region of said substrate to thereby produce an electrical resistance or resistivity in said conductors proportional to strain in said conductors as a result of the force applied to the first region or the second region; and
Specification