PAGE DISCRIMINATING METHOD OF BOOK TYPE KEYBOARD

PURPOSE:To discriminate pages, by providing holes at both ends of pages and photosensors in correspondence to the position of the holes. CONSTITUTION:Photosensors 1a-1c are placed at the left side of pages 3, and photosensors 1d-1f are located at the right side of the pages 3. Each page of the pages...

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Bibliographic Details
Main Authors MATSUNAGA HAYASHI, KADANI SHIYOUZOU
Format Patent
LanguageEnglish
Published 30.06.1983
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:PURPOSE:To discriminate pages, by providing holes at both ends of pages and photosensors in correspondence to the position of the holes. CONSTITUTION:Photosensors 1a-1c are placed at the left side of pages 3, and photosensors 1d-1f are located at the right side of the pages 3. Each page of the pages 3 has discriminating holes 2a-2c. Through-holes (white round) among the discriminating holes transmit light and then the output of the corresponding photosensor goes to ''1''. The outputs of the photosensors 1a-1c are inverted and the outputs of the photosensors 1d-1f are outputted directly. Seven pages are discriminated by using the 6 sensors. Since the number of photosensors required is halved, the cost is reduced remarkably.
Bibliography:Application Number: JP19810215517