POSITION INPUT DEVICE
First Claim
1. A position input device comprising:
- a light guide plate having a surface with an active input area formed thereon, for allowing one to touch said surface for identification of an input position to obtain scattered light from a ray of light traveling under said input position;
a plurality of light emitting elements for emitting a ray of light into said light guide plate and scanning said active input area in one coordinate direction with the emitted ray of light;
a light receiving element disposed along the other coordinate direction of said active input area, for receiving the scattered light guided by said light guide plate; and
input position detection means for detecting an input position within said active input area based on a coordinate position in said one coordinate direction identified by scanning with said plurality of light emitting elements and a coordinate position identified in said other coordinate direction when said plurality of light emitting elements are turned on or off for scanning, and the coordinate position in said other coordinate direction can be identified by said light receiving element receiving the light.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical position input device is provided which enables simultaneously inputting of multiple points.
The position input device (10) includes: a light guide plate (5) having a surface with an active input area (1) formed thereon, for allowing one to touch the surface for identification of an input position to obtain scattered light from a ray of light traveling under the input position; a plurality of light emitting elements (2) for emitting a ray of light into the light guide plate (5) and scanning the active input area (1) in one coordinate direction with the emitted ray of light; a light receiving element (3) disposed along the other coordinate direction of the active input area, for receiving the scattered light guided by the light guide plate (5); and input position detection means (4) for detecting an input position within the active input area (1) based on a coordinate position in the one coordinate direction identified by scanning with the plurality of light emitting elements (2) and a coordinate position identified in the other coordinate direction when the plurality of light emitting elements (2) are turned on or off for scanning, and the coordinate position in the other coordinate direction can be identified by the light receiving element (3) receiving the light.
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Citations
13 Claims
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1. A position input device comprising:
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a light guide plate having a surface with an active input area formed thereon, for allowing one to touch said surface for identification of an input position to obtain scattered light from a ray of light traveling under said input position; a plurality of light emitting elements for emitting a ray of light into said light guide plate and scanning said active input area in one coordinate direction with the emitted ray of light; a light receiving element disposed along the other coordinate direction of said active input area, for receiving the scattered light guided by said light guide plate; and input position detection means for detecting an input position within said active input area based on a coordinate position in said one coordinate direction identified by scanning with said plurality of light emitting elements and a coordinate position identified in said other coordinate direction when said plurality of light emitting elements are turned on or off for scanning, and the coordinate position in said other coordinate direction can be identified by said light receiving element receiving the light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13)
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12. A position input device comprising:
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a light guide plate having a surface with an active input area formed thereon, for allowing one to touch said surface for identification of an input position to obtain scattered light from a ray of light traveling under said input position; a light emitting element disposed along one coordinate direction of said light guide plate; a plurality of open/close means disposed between said light guide plate and said light emitting element, for opening or closing an incidence optical path for the ray of light from said light emitting element into said light guide plate so as to allow the ray of light emitted into said light guide plate to scan said active input area in said one coordinate direction; a light receiving element disposed along the other coordinate direction of said active input area, for receiving scattered light that is guided by said light guide plate; and input position detection means for detecting an input position within said active input area based on a coordinate position in said one coordinate direction identified by scanning with said plurality of open/close means and a coordinate position identified in said other coordinate direction when said plurality of open/close means are opened or closed for scanning, and the coordinate position in said other coordinate direction can be identified by said light receiving element receiving the light.
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Specification