Touch sensing apparatus and method for assembly
First Claim
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1. A touch sensing apparatus, comprising:
- a plate comprising a touch surface, a back surface, and an edge surface;
a support structure including a first portion extending parallel to a normal of the touch surface and a second portion extending from an end of the first portion in a plane parallel to the touch surface, said support structure extending above the touch surface, said support structure configured to support an emitter mounting structure configured to mount an emitter,wherein the emitter is configured to transmit light in a plane above the touch surface and perpendicular to a normal of the touch surface and wherein the second portion overlaps with at least a portion of the touch surface forming a cavity with a height; and
an optical element positioned inside the cavity in between the touch surface and the second portion, said optical element comprising a first surface configured to receive the transmitted light directly from the emitter and a second surface configured to receive light propagating across a touch interacting portion of the touch surface,wherein the first surface comprises a light collimating surface,wherein the optical element comprises a protrusion configured to interlock with a recess in the second portion, andwherein the emitter mounting structure is separated by a distance from the first surface and configured to form a gap between the emitter and the first surface.
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Abstract
A touch sensing apparatus is disclosed comprising a panel that defines a touch surface, a plurality of light emitters and detectors arranged along a perimeter of the panel. The light emitters are arranged to emit a respective beam of emitted light that travels above the touch surface, wherein the light detectors are arranged to receive detection light from the emitted light. The plurality of light emitters and detectors are arranged above the touch surface and are connected to a substrate extending in a direction parallel with a normal axis of a plane in which the panel extends. A method of assembling a touch sensing apparatus is also disclosed.
630 Citations
16 Claims
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1. A touch sensing apparatus, comprising:
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a plate comprising a touch surface, a back surface, and an edge surface; a support structure including a first portion extending parallel to a normal of the touch surface and a second portion extending from an end of the first portion in a plane parallel to the touch surface, said support structure extending above the touch surface, said support structure configured to support an emitter mounting structure configured to mount an emitter, wherein the emitter is configured to transmit light in a plane above the touch surface and perpendicular to a normal of the touch surface and wherein the second portion overlaps with at least a portion of the touch surface forming a cavity with a height; and an optical element positioned inside the cavity in between the touch surface and the second portion, said optical element comprising a first surface configured to receive the transmitted light directly from the emitter and a second surface configured to receive light propagating across a touch interacting portion of the touch surface, wherein the first surface comprises a light collimating surface, wherein the optical element comprises a protrusion configured to interlock with a recess in the second portion, and wherein the emitter mounting structure is separated by a distance from the first surface and configured to form a gap between the emitter and the first surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A touch sensing apparatus, comprising:
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a plate comprising a touch surface, a back surface, and an edge surface; a support structure including a first portion extending parallel to a normal of the touch surface and a second portion extending from an end of the first portion in a plane parallel to the touch surface, said support structure extending above the touch surface, said support structure configured to support an emitter mounting structure configured to mount an emitter, wherein the emitter is configured to transmit light in a plane above the touch surface and perpendicular to a normal of the touch surface and wherein the second portion overlaps with at least a portion of the touch surface forming a cavity with a height; and an optical element positioned inside the cavity in between the touch surface and the second portion, said optical element comprising a light collimating surface. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification