COORDINATE INPUT DEVICE
PURPOSE:To obtain a horizontal coordinate even when no opposite light emitting element and photodetector pair exists at the upper and lower side of a display pattern by using an optical path tilted in the horizoantal direction. CONSTITUTION:A board 2 is arranged only to the left and right sides of a...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | PURPOSE:To obtain a horizontal coordinate even when no opposite light emitting element and photodetector pair exists at the upper and lower side of a display pattern by using an optical path tilted in the horizoantal direction. CONSTITUTION:A board 2 is arranged only to the left and right sides of a display pattern 1. Plural photodetectors 3 are arranged to the left board and plural light emitting elements 4 are arranged to the right board via a prescribed interval respectively and the optical axis of each element is arranged so that the optical path between a couple of right/left opposed light emitting element and photodetector is tilted clockwide to the horizontal X axis of the display pattern by theta (0 deg. |
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