Touch panel
First Claim
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1. A touch panel comprising:
- a light-emitting element;
a coordinate input region;
a light-emitting sided-optical waveguide for guiding light emitted from the light-emitting element to generate light beams for crossing the coordinate input region and having an output end;
a light-receiving sided-optical waveguide for receiving the light beams having crossed the coordinate input region and having an input end;
a light-receiving element for detecting the intensity of light received at the light-receiving sided-optical waveguide; and
an electromagnetic induction-type digitizer provided in a lower part of the coordinate input region,wherein the light-receiving sided-optical waveguide comprises;
cores; and
a cladding wherein the cores are embedded, the cores each including core branched groups arranged so as to receive light beams; and
core main paths for coupling the core branched groups to guide light to the light-receiving element.
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Abstract
A touch panel 30 of the present invention comprises: a light-emitting sided-optical waveguide 33; a light-receiving sided-optical waveguide 34; and an electromagnetic induction-type digitizer 36. In the touch panel of the present invention, a position coordinate is recognized using an electronic pen by an electromagnetic induction-type digitizer 36 when high resolution is required. A position coordinate is recognized using a finger by the optical waveguides 33 and 34 when high resolution is not required. This makes it possible to materialize the touch panel 30 having a high resolution and a lower power consumption regardless of its narrow frame.
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Citations
2 Claims
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1. A touch panel comprising:
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a light-emitting element; a coordinate input region; a light-emitting sided-optical waveguide for guiding light emitted from the light-emitting element to generate light beams for crossing the coordinate input region and having an output end; a light-receiving sided-optical waveguide for receiving the light beams having crossed the coordinate input region and having an input end; a light-receiving element for detecting the intensity of light received at the light-receiving sided-optical waveguide; and an electromagnetic induction-type digitizer provided in a lower part of the coordinate input region, wherein the light-receiving sided-optical waveguide comprises;
cores; and
a cladding wherein the cores are embedded, the cores each including core branched groups arranged so as to receive light beams; and
core main paths for coupling the core branched groups to guide light to the light-receiving element. - View Dependent Claims (2)
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Specification