Touch Screen Shield
First Claim
1. A transparent shield for a touch sensitive screen of a device, the shield comprising:
- a first transparent layer defining opposed first and second sides, the first transparent layer defining an outer periphery;
a thin layer of pressure sensitive adhesive disposed on an outer peripheral portion of the second side of the first transparent layer;
a second transparent layer defining opposed first and second sides, the first side of the second transparent layer being attached to a central portion of the second side of the first transparent layer, an outer periphery of the second transparent layer being smaller than the outer periphery of the first transparent layer so as to define a step;
wherein the outer peripheral portion of the first transparent layer is attachable to the device so that the central portion of the second side of the first transparent layer is positioned on top of the touch sensitive screen of the device, and the first transparent layer is placed in tension when the outer peripheral portion of the first transparent layer is attached to the device.
6 Assignments
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Accused Products
Abstract
A shield that is attachable to a touch sensitive screen is disclosed. The shield may be attached to the touch sensitive screen only at its outer peripheral portion. An air gap is enclosed between the shield and the touch sensitive screen to form a planar air bearing. The shield preferably does not touch the active area of the touch sensitive screen when the user is not touching the shield but only viewing the touch sensitive screen through the shield. This mitigates unwanted optical artifacts such as trapped air bubbles, Newton rings and chromatic interference while maintaining the sensitivity of the touch sensitive screen.
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Citations
15 Claims
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1. A transparent shield for a touch sensitive screen of a device, the shield comprising:
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a first transparent layer defining opposed first and second sides, the first transparent layer defining an outer periphery; a thin layer of pressure sensitive adhesive disposed on an outer peripheral portion of the second side of the first transparent layer; a second transparent layer defining opposed first and second sides, the first side of the second transparent layer being attached to a central portion of the second side of the first transparent layer, an outer periphery of the second transparent layer being smaller than the outer periphery of the first transparent layer so as to define a step; wherein the outer peripheral portion of the first transparent layer is attachable to the device so that the central portion of the second side of the first transparent layer is positioned on top of the touch sensitive screen of the device, and the first transparent layer is placed in tension when the outer peripheral portion of the first transparent layer is attached to the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A transparent shield for a touch sensitive screen of a device, the shield comprising:
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a first transparent layer defining opposed first and second sides; pressure sensitive adhesive disposed only at an outer peripheral portion of the second side of the first transparent layer, the pressure sensitive adhesive being sufficiently thick so as to form an air gap between the first transparent layer and the touch sensitive screen when the shield is mounted to the electronic device; wherein the outer peripheral portion of the first transparent layer is attachable to the device so that the central portion of the second side of the first transparent layer is positioned on top of the touch sensitive screen of the device. - View Dependent Claims (13, 14, 15)
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Specification