Title:
【発明の名称】座標入力装置及び方法
Document Type and Number:
Japanese Patent JP3071254
Kind Code:
B2
Abstract:
PURPOSE:To correct an error caused by the inclination of an input pen, etc., when vibration transfer delay time is counted to calculate a position. CONSTITUTION:In an coordinate input device for which a vibration pen 3 imparts the vibration to a vibration transferring plate 8 and the vibration is detected by a sensor 6 to decide a coordinate, the distance from the input position is found by considering the delay time until detection and the vibration speed. In the distance value, the error as much as the integer multiple of wave length is estimated to be included based upon the vibration condition found by the sensor 6. In order to correct the error, the deviation quantity as much as the integer multiple of the wave length is calculated from a group delay time, however, the obtained value may not be an integer. Therefore, an error can be generated when the obtained value is made into an integer. In order to suppress the error to a minimum, the deviation included in the value before making it into an integer is corrected by considering the difference between the value before making it into an integer and that after changed into an integer to calculate more an accurate coordinate.
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Inventors:
Atsushi Tanaka
Ryozo Yanagisawa
Kiyoshi Kaneko
Shinnosuke Taniishi
Katsuyuki Kobayashi
Yuichiro Yoshimura
Ryozo Yanagisawa
Kiyoshi Kaneko
Shinnosuke Taniishi
Katsuyuki Kobayashi
Yuichiro Yoshimura
Application Number:
JP22678891A
Publication Date:
July 31, 2000
Filing Date:
September 06, 1991
Export Citation:
Assignee:
Canon Inc
International Classes:
G06F3/043; G06F3/03; G06F3/041; G06F3/048; G06F3/0488; (IPC1-7): G06F3/03; G06F3/03
Domestic Patent References:
| JP6133523A | ||||
| JP2130614A | ||||
| JP63100531A | ||||
| JP1124015A | ||||
| JP1201714A |
Attorney, Agent or Firm:
Yasunori Otsuka (1 person outside)