Title:
デジタイザおよびそれを備えた電子黒板
Document Type and Number:
Japanese Patent JP4552345
Kind Code:
B2
Abstract:
A transcription system, for determining a position of a stylus relative to a writing surface by receiving supersonic wave transmitted from the stylus when the stylus is positioned adjacent the writing surface, has a pair of supersonic wave detectors provided on a whiteboard. The supersonic wave detector has a detector cover for covering at least a front portion of a supersonic wave receiver of the supersonic wave detector with reference to the supersonic wave transmitted from the stylus. The detector cover has a hole, which is defined right in front of the receiver, having a diameter smaller than a diameter of the receiver. The detector cover further has a conical reflection board provided adjacent the hole of the detector cover.
Inventors:
Kuji Kusue
Application Number:
JP2001108173A
Publication Date:
September 29, 2010
Filing Date:
April 06, 2001
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
B43L1/04; G06F3/043; G06F3/033; G06F3/041; G06F3/042; G06F3/046; H04N1/00; H04R1/00
Domestic Patent References:
| JP3210622A | ||||
| JP10332817A | ||||
| JP2196973A | ||||
| JP4184615A | ||||
| JP11039096A | ||||
| JP2001513234A |
Attorney, Agent or Firm:
Hiroki Naito
Daisuke Nagano
Kentaro Fujii
Daisuke Nagano
Kentaro Fujii