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US 8,284,332 B2Granted
Touch screen sensor with low visibility conductors
Assignee3M Innovative Properties Company
InventorsBernard O. Geaghan, Edward S. Hagermoser
Life of this patent
Estimating the term…
Abstract
A touch screen sensor with a conductive micropattern includes one or more features to obscure or reduce the visibility of the conductive micropattern.
Claims46
A touch-sensitive device comprising:
- a first visible light transparent substrate having a touch-interface surface and a display-interface surface, the touch-interface surface disposed toward touch input, and the display interface disposed toward the output of a liquid crystal or organic light emitting diode display;
- a second visible light transparent substrate having a first surface and a second surface and also having a touch sensing area comprised of an electrically conductive micropattern disposed on or in the second visible light transparent substrate, wherein the micropattern includes conductors with width between about 1 and 10 micrometers;
- wherein the first surface of the second visible light transparent substrate is disposed toward the display-interface surface of the first visible light transparent substrate;
- and wherein the first visible light transparent substrate includes a light scattering feature comprising randomly or pseudo-randomly oriented facets having a size greater than the width of the conductors, that reduces the visibility of the micropattern.
1 more element
A touch screen sensor having a touch-sensitive surface comprising:
- within a touch sensing area, a electrically conductive micropattern disposed on or in a visible light transparent substrate, wherein the micropattern includes conductive traces with width between about 1 and 10 micrometers and the touch sensing area is visible light transparent and has between 90% and 99.95% open area;
- and
- one or more micropattern-obscuring features in a continuous layer of uniform optical density disposed between the micropattern and the touch-sensitive surface, to reduce the visibility of the micropattern.
A touch screen sensor having a touch-sensitive surface comprising:
- within a touch sensing area, a electrically conductive micropattern disposed on or in a visible light transparent substrate, wherein the micropattern includes conductive traces with width between about 1 and 10 micrometers;
- and
- one or more micropattern-obscuring features, at least one of the features comprising one or more light scattering elements in a continuous layer of uniform optical density disposed between the micropattern and the touch-sensitive surface, to reduce the visibility of the micropattern, and wherein the light scattering elements comprise facets having a size greater than the width of the conductive traces.
A touch-sensitive device comprising:
- a first visible light transparent substrate having a touch-interface surface and a display-interface surface, the touch-interface surface disposed toward touch input, and the display interface disposed toward the output of a liquid crystal or organic light emitting diode display;
- a second visible light transparent substrate having a first surface and a second surface and also having a touch sensing area comprised of an electrically conductive micropattern disposed on or in the second visible light transparent substrate, wherein the micropattern includes conductors with width between about 1 and 5 micrometers;
- wherein the first surface of the second visible light transparent substrate is disposed toward the display-interface surface of the first visible light transparent substrate;
- and wherein the first visible light transparent substrate includes a light scattering feature comprising randomly or pseudo-randomly oriented facets having a size greater than the width of the conductors, that reduces the visibility of the micropattern.
1 more element
A touch screen sensor having a touch-sensitive surface comprising:
- within a touch sensing area, a electrically conductive micropattern disposed on or in a visible light transparent substrate, wherein the micropattern includes conductive traces with width between about 1 and 5 micrometers and the touch sensing area is visible light transparent and has between 90% and 99.95% open area;
- and
- one or more micropattern-obscuring features in a continuous layer of uniform optical density disposed between the micropattern and the touch-sensitive surface, to reduce the visibility of the micropattern.
A touch screen sensor having a touch-sensitive surface comprising:
- within a touch sensing area, a electrically conductive micropattern disposed on or in a visible light transparent substrate, wherein the micropattern includes conductive traces with width between about 1 and 5 micrometers;
- and
- one or more micropattern-obscuring features, at least one of the features comprising one or more light scattering elements in a continuous layer of uniform optical density disposed between the micropattern and the touch-sensitive surface, to reduce the visibility of the micropattern, and wherein the light scattering elements comprise facets having a size greater than the width of the conductive traces.
Dependencies are inferred from the claim text.