Multi-transducer waveguide arrays
First Claim
1. An acoustic touch apparatus, comprising:
- a substrate configured to propagate surface acoustic waves, the substrate having;
a first segmented reflective array, comprising;
a first major reflective array configured to propagate a first portion of surface acoustic waves in a first direction defining a first beginning and a first end of the first major reflective array; and
a first waveguide core configured to concentrate acoustic energy of the first portion of surface acoustic waves;
a second segmented reflective array, comprising;
a second major reflective array configured to propagate a second portion of surface acoustic waves in a second direction defining a second beginning and a second end of the second major reflective array; and
a second waveguide core configured to concentrate acoustic energy of the second portion of surface acoustic waves, wherein;
the first end of the first major reflective array extends beyond the second end of the second major reflective array, thereby defining a first directly adjacent portion of the first major reflective array;
the second end of the second major reflective array extends beyond the first end of the first major reflective array, thereby defining a second directly adjacent portion of the second major reflective array;
the first directly adjacent portion and the second directly adjacent portion define an overlap region of the substrate; and
the first direction is antiparallel to the second direction.
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Accused Products
Abstract
Systems and related methods providing for touch sensors having segmented reflective arrays including waveguide cores are discussed herein. A touch sensor may include a substrate configured to propagate surface acoustic waves. The substrate may include two or more segmented reflective arrays. A segmented reflective array may include a major reflective array configured to propagate surface acoustic waves and a waveguide core configured to concentrate acoustic energy of the surface acoustic waves. Two segmented reflective arrays may further include adjacent portions that define an overlap region of the substrate. In some embodiments, the segmented reflective array may further include a beam dump configured to decrease intensity of surface acoustic wave propagation past the end of the segmented reflective array.
39 Citations
18 Claims
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1. An acoustic touch apparatus, comprising:
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a substrate configured to propagate surface acoustic waves, the substrate having; a first segmented reflective array, comprising; a first major reflective array configured to propagate a first portion of surface acoustic waves in a first direction defining a first beginning and a first end of the first major reflective array; and a first waveguide core configured to concentrate acoustic energy of the first portion of surface acoustic waves; a second segmented reflective array, comprising; a second major reflective array configured to propagate a second portion of surface acoustic waves in a second direction defining a second beginning and a second end of the second major reflective array; and a second waveguide core configured to concentrate acoustic energy of the second portion of surface acoustic waves, wherein; the first end of the first major reflective array extends beyond the second end of the second major reflective array, thereby defining a first directly adjacent portion of the first major reflective array; the second end of the second major reflective array extends beyond the first end of the first major reflective array, thereby defining a second directly adjacent portion of the second major reflective array; the first directly adjacent portion and the second directly adjacent portion define an overlap region of the substrate; and the first direction is antiparallel to the second direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An acoustic touch apparatus, comprising:
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a substrate configured to propagate surface acoustic waves, the substrate having; at least eight acoustic wave transducers; and at least eight segmented reflective arrays, each segmented reflective array including; a major reflective array configured to propagate surface acoustic waves, and a waveguide core configured to concentrate acoustic energy of the surface acoustic waves; and wherein one end of each major reflective array extends beyond an end of another major reflective array, thereby defining a directly adjacent portion of overlap between two major reflective arrays, and direction of propagation of the surface acoustic waves is antiparallel between the two major reflective arrays having the directly adjacent portion of overlap.
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18. An acoustic touch apparatus, comprising:
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a substrate configured to propagate surface acoustic waves, the substrate having; at least six acoustic wave transducers; and at least six reflective arrays, wherein at least four of the at least six reflective arrays are segmented reflective arrays that each includes; a major reflective array configured to propagate surface acoustic waves, and a waveguide core configured to concentrate acoustic energy of the surface acoustic waves; and wherein one end of each major reflective array extends beyond an end of another major reflective array, thereby defining a directly adjacent portion of overlap between two major reflective arrays, and direction of propagation of the surface acoustic waves is antiparallel between the two major reflective arrays having the directly adjacent portion of overlap.
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Specification