Wireless pen-type input device for use with a computer
First Claim
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1. A wireless input device for a computer comprising:
- a pen-type input unit having a light emitting element capable of emitting light pulses;
two light receiving elements spaced apart from each other by a predetermined distance and arranged at a predetermined inclination angle facing toward an area in which said pen-type input unit is positioned, wherein each of said light receiving elements is a two-division light sensing means capable of detecting two separate quantities of incident received from said pen-type input unit indicative of an angle defined by the position of the pen-type input unit relative to the inclination angle of each said light receiving element; and
a position detecting and calculating circuit electrically coupled to respective outputs of said light receiving elements and having means for calculating position coordinates corresponding to the position of said pen-type input unit derived on the basis of a ratio of the difference in light quantities to the sum of light quantities received by said receiving elements from said pen-type input unit, the predetermined distance between the two light receiving elements, and the predetermined inclination angle of the light receiving elements.
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Abstract
A wireless input device for computer comprises a pen-type input device having a source of light capable of transmitting pulses. Two light receiving elements are provided and these light receiving element are disposed for detecting an incident angle of light inputted from the source of light. The wireless input device also has an input unit body having an operational unit for calculating the position of the pen-type input device from the amounts of light detected by the two light receiving elements.
120 Citations
10 Claims
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1. A wireless input device for a computer comprising:
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a pen-type input unit having a light emitting element capable of emitting light pulses; two light receiving elements spaced apart from each other by a predetermined distance and arranged at a predetermined inclination angle facing toward an area in which said pen-type input unit is positioned, wherein each of said light receiving elements is a two-division light sensing means capable of detecting two separate quantities of incident received from said pen-type input unit indicative of an angle defined by the position of the pen-type input unit relative to the inclination angle of each said light receiving element; and a position detecting and calculating circuit electrically coupled to respective outputs of said light receiving elements and having means for calculating position coordinates corresponding to the position of said pen-type input unit derived on the basis of a ratio of the difference in light quantities to the sum of light quantities received by said receiving elements from said pen-type input unit, the predetermined distance between the two light receiving elements, and the predetermined inclination angle of the light receiving elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification