Handwritten character input device

• US 4,947,156 A
• Filed: 10/04/1989
• Issued: 08/07/1990
• Est. Priority Date: 11/16/1984
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Sato, Takefumi, Mori, Kusuki
• Primary Examiner(s): Moore, David K.
• Assistant Examiner(s): FATAHI YAR, MAHMOUD
• Application Number:
  US07/418,824
• Time in Patent Office: 307 Days
• Field of Search: 340/706, 340/707, 340/708, 340/709, 340/710, 340/711, 340/712, 340/724, 340/734, 178/18, 178/19, 364/520
• US Class Current: 345/178
• CPC Class Codes: G06F 3/046 by electromagnetic means
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

A handwritten character input device in which a dot-matrix display panel and a tablet are laid one on the other. The detection coordinates of the tablet correspond with the dot coordinates of the display panel. A coordinate conversion unit is provided for shifting the dot coordinates vertically and laterally with respect to the detection coordinates of the tablet.

Claims

1. A handwritten character input device comprising:

a dot-matrix display panel having dot coordinates;

input means for generating magnetic flux

a tablet having detection coordinates corresponding to the dot coordinates of said display panel, said tablet being positioned next to said display panel and being responsive to magnetic flux from said input means; and

coordinate conversion means for selectively permitting manual adjustment of said dot coordinates by a desired amount such that said dot coordinates are shifted vertically and laterally with respect to their corresponding detection coordinates;

said dot coordinates on said dot-matrix display panel being selectively shifted to compensate for certain characteristics of a user of said handwritten character input device, said certain characteristics being at least parallax due to an altitude or posture of the user and a deviation in detecting said magnetic flux due to the tilt of the input means.

2. The handwritten character input device of claim 1, further comprising memory means for storing the desired amount selected by said manual adjustment of said coordinate conversion means, said memory means permitting avoidance of repetitive manual adjustments of said dot coordinates between uses of said device.

3. The handwritten character input device of claim 1 wherein said coordinate conversion means includes cursor keys, a correction mode key and a release key for permitting the manual adjustments, said cursor keys being operable for vertically and laterally shifting said dot coordinates, said correction mode key being operable to activate said coordinate conversion means, thereby causing said dot coordinates to be shifted by operation of said cursor keys, and said release key being operable to input shifted dot coordinates into a memory for storage upon activation thereof, storage of the inputted shifted dot coordinates permitting repetitive manual adjustments to be avoided between users of said device.

4. The handwritten character input device of claim 1 wherein said coordinate conversion means includes a slidable vertical position correction switch and a slidable lateral position correction switch for permitting the manual adjustments.

5. The handwritten character input device of claim 1 wherein said input means is a manually operated input pen for activating said detection coordinates of said tablet, said dot coordinates of said display panel thereafter being actuated in order to cause display of handwritten characters.