Stylus for optical digitizer
First Claim
1. An optical stylus having a point light movable along a coordinate plane according to a drawing operation and being used as an input device for an optical digitizer which converts the point light into an electric signal to compute coordinates of a position of the point light, the optical stylus comprising:
- a holder portion that may be manually manipulated to perform the drawing operation;
a tip portion protruding from the holder portion and forming the point light, the tip portion comprising a plurality of light-emitting members each for emitting light of a different color and a light guide member for encapsulating the light-emitting members, the light guide member comprising a transparent material having a tubular configuration having a closed tip end, an open end, an outer face and an inner face, the light-emitting members being mounted in the open end, and at least one of the outer face and the inner face being patterned to scatter the light emitted from the light-emitting members; and
writing force detecting means for detecting a writing force applied to the tip portion and controlling the respective light-emitting members to emit light depending upon the detected writing force.
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Accused Products
Abstract
An optical digitizer is constructed for determining a position of a pointing object projecting a light and being disposed on a coordinate plane. In the optical digitizer, a detector is disposed on a periphery of the coordinate plane and has a view field covering the coordinate plane for receiving the light projected from the pointing object and for converting the received light into an electric signal. A processor is provided for processing the electric signal fed from the detector to compute coordinates representing the position of the pointing object. A collimator is disposed to limit the view field of the detector below a predetermined height relative to the coordinate plane such that through the limited view field the detector can receive only a parallel component of the light which is projected from the pointing object substantially in parallel to the coordinate plane. A shield is disposed to enclose the periphery of the coordinate plane to block a noise light other than the projected light from entering into the limited view field of the detector.
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Citations
10 Claims
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1. An optical stylus having a point light movable along a coordinate plane according to a drawing operation and being used as an input device for an optical digitizer which converts the point light into an electric signal to compute coordinates of a position of the point light, the optical stylus comprising:
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a holder portion that may be manually manipulated to perform the drawing operation;
a tip portion protruding from the holder portion and forming the point light, the tip portion comprising a plurality of light-emitting members each for emitting light of a different color and a light guide member for encapsulating the light-emitting members, the light guide member comprising a transparent material having a tubular configuration having a closed tip end, an open end, an outer face and an inner face, the light-emitting members being mounted in the open end, and at least one of the outer face and the inner face being patterned to scatter the light emitted from the light-emitting members; and
writing force detecting means for detecting a writing force applied to the tip portion and controlling the respective light-emitting members to emit light depending upon the detected writing force. - View Dependent Claims (2, 3)
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4. An optical stylus having a point light movable along a coordinate plane according to a drawing operation and being used as an input device for an optical digitizer which converts the point light into an electric signal to compute coordinate of a position of the point light, the optical stylus comprising:
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a holder portion that may be manually manipulated to perform the drawing operation;
a tip portion protruding from the holder portion and forming the point light, the tip portion comprising light-emitting means for emitting a light of different wavelengths and a light guide member for encapsulating the light-emitting means, the light guide member comprising a transparent material having a tubular configuration having a closed tip end, an open end, an outer face and an inner face, the light-emitting means being mounted in the open end; and
and writing force detecting means for detecting a writing force applied to the tip portion and controlling the light-emitting means to emit light of a wavelength depending upon the detected writing force. - View Dependent Claims (5, 6)
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7. An input device for a computing system, comprising:
- a movable housing;
a plurality of light-emitting elements contained in the housing each for projecting a light of a different color externally of the housing so that the position of the housing can be monitored based on the projected light; and
modulation means for controlling the light-emitting elements in response to force applied to the housing portion to change a color of the light projected by the light-emitting elements, and including means for detecting a writing force applied to the housing and controlling the respective light-emitting elements to emit light depending upon the detected force and including means for detecting a writing force applied to the housing and controlling the respective light-emitting elements to emit light depending upon the detected force. - View Dependent Claims (8, 9, 10)
- a movable housing;
Specification