JP2010505178A5

JP2010505178A5 -

Info

Publication number: JP2010505178A5
Application number: JP2009529854A
Authority: JP
Filing date: 2007-09-25
Publication date: 2010-11-11
Anticipated expiration: 2027-09-25

Claims

An optical touch panel,
The optical touch panel has a support,
The optical touch panel has a fiber optic illumination assembly disposed along and on at least a portion of the outer periphery of the support to define a detection area;
The assembly includes at least one optical fiber having a core and a cladding, the at least one optical fiber having a cross section defining an outer periphery, wherein the at least one optical fiber is in at least one position along it. Having at least one discontinuity for scattering light, the at least one optical fiber having refractive power in at least one light transmissive region, wherein the light transmissive region is proximate to the discontinuity. Has a focal point located, and
The assembly includes a light source arranged to transmit light along the at least one optical fiber;
The optical touch panel has at least one photodetector, and the photodetector is configured to detect a change in light, and the change in light is determined by the presence of an object in the detection area. Generated and received from the fiber optic lighting assembly; and
The optical touch panel includes a detection circuit, which receives at least one output from the at least one photodetector, and detects a two-dimensional position of an object intrusion into the detection area. Provide an output display,
The optical touch panel.

An optical touch panel,
The optical touch panel has a support that defines a generally flat surface,
The optical touch panel includes a light illumination assembly, the light illumination assembly being disposed along and on at least a portion of the outer periphery of the support to define a detection area;
The assembly includes at least one light guide, the at least one light guide has at least one light scatterer, and the at least one light guide has refractive power at at least one surface; The surface has a focal point located close to the light scatterer; and
The assembly includes at least one light source arranged to transmit light along the at least one light guide, the refractive power of the at least one light guide and the at least one light scatterer comprising: Function to direct light received from the at least one light source along at least one light guide and scattered by the at least one light scatterer generally in a plane parallel to the generally flat surface. ,
The optical touch panel has at least one photodetector, and the photodetector is configured to detect a change in light, and the change in light is determined by the presence of an object in the detection area. Generated and received from the light illumination assembly; and
The optical touch panel includes a detection circuit, which receives at least one output from the at least one photodetector, and detects a two-dimensional position of an object intrusion into the detection area. Provide an output display,
The optical touch panel.

The at least one light guide extends along at least most of the outer periphery of the light curtain region parallel to the generally flat surface, and the at least one light scatterer is on the outer periphery of the light curtain region. The optical system of claim 2 , extending along and providing a generally uniform distribution of light in the plane, filling an inner periphery of the light curtain region and thereby defining a light curtain therein. Touch panel.

The optical touch panel also includes at least one light curtain intrusion sensor that senses an intrusion in the light curtain and generates an intrusion output signal that includes two-dimensional intrusion position information. The optical touch panel according to claim 3 , wherein the optical touch panel includes an output signal processing circuit for providing an output display of a two-dimensional intrusion position.

The at least one light guide comprises a single light guide; and
The at least one light source has two light sources, and a single light source is disposed at each end of the single light guide;
The optical touch panel according to claim 2 .

The optical touch panel according to claim 2 , wherein the at least one light source is located only at a corner of an outer peripheral edge of the detection region.

The light scattering function of the at least one light scattering body is at least one change along the light guide length to provide compensation for the attenuation produced by the light guide, according to claim 2 Optical touch panel.

The optical touch panel as claimed in claim 2 , wherein the detection circuit operates at least in part by triangulation.

The at least one light guide extends along three sides of the detection region, the at least one detector has a pair of detectors, and the detectors are adjacent corners of the detection region. Are arranged side by side at both ends of the at least one light guide, and
The optical touch panel as claimed in claim 2 , wherein the detection circuit operates at least in part by triangulation.

The optical touch panel as claimed in claim 2 , wherein the at least one light guide has an aspheric cross section and the at least one light scatterer is precisely located at the focal point of the at least one surface.

The optical touch panel according to claim 2 , wherein the at least one light scatterer includes a layer of paint that scatters light.

The optical touch panel according to claim 2 , wherein the optical touch panel further includes a guide that defines an elongated transparent mounting portion and a window portion, and the guide is fixed to the support.

The optical touch panel of claim 12 , wherein the elongate transparent mounting portion and the guide defining the window portion function to ensure correct placement of the light illumination assembly relative to the support.

The optical touch panel according to claim 12 , wherein the elongate transparent mounting portion and the guide defining the window portion have a U-shaped cross section.

The optical touch panel as claimed in claim 12 , wherein the elongate transparent mounting portion and the guide defining the window portion function to minimize light reduction from the at least one light guide.