发明名称 Coordinate position inputting/detecting device, a method for inputting/detecting the coordinate position, and a display board system
摘要 In the coodinate-position inputting/detecting device, the light receiving/emitting devices emit light beams spreading in a fan shape and travelling along an entry area. The light receiving/emitting device also receiving the light beam reflected by a recursive reflecting member and detect the distribution of the intensity of the received light beam. The coordinates of a position of a pointing body such as a user's fingertip or a pen inserted in the entry area is identified using the distribution of intensity detected by the light receiving/emitting devices.
申请公布号 US6429856(B1) 申请公布日期 2002.08.06
申请号 US19990307809 申请日期 1999.05.10
申请人 RICOH COMPANY, LTD. 发明人 OMURA KATSUYUKI;TSUDA KUNIKAZU;TANAKA MAKOTO
分类号 G06F3/042;B43L1/04;G06F3/033;G06F3/041;G06F3/048;(IPC1-7):G09G5/00 主分类号 G06F3/042
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