Pen input device

• US 5,754,169 A
• Filed: 12/29/1994
• Issued: 05/19/1998
• Est. Priority Date: 03/07/1994
• Status: Expired due to Term

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Yashiro, Sadao
• Primary Examiner(s): Bayerl, Raymond J.
• Assistant Examiner(s): SURACI, JOHN F
• Application Number:
  US08/365,879
• Time in Patent Office: 1,237 Days
• Field of Search: 345/173, 345/175, 345/179, 382/187, 382/189, 395/148, 395/138, 395/139, 395/149
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

A pen input device recognizes the fact that an input pen is located at a near position with respect to an input screen, and changes displayed images on a display screen on the basis of the recognition, so that complicated operation can be omitted and pen input is allowed with a feeling similar to that of writing on paper.

Claims

1. A pen input device comprising:

a tablet having a display screen for displaying displayed images and an input screen integral with the display screen;

an input pen for performing coordinate specifying input by contact with said input screen and hand-writing input by contact scanning on said input screen;

pen position recognizing means for recognizing whether said input pen is in a near position or a remote position with respect to said input screen; and

display processing means for changing displayed images on said display screen when said input pen is in the near position by said pen position recognizing means,

wherein the operation of said display processing means is released in response to recognition of the remote position performed by said pen position recognizing means so as to display unchanged displayed images.

2. A pen input device comprising:

a tablet having a display screen for displaying displayed images and an input screen integral with the display screen;

an input pen for performing coordinate specifying input by contact with said input screen and hand-writing input by contact scanning on said input screen;

pen position recognizing means for recognizing whether said input pen is in a near position or a remote position with respect to said input screen; and

display processing means for changing displayed images on said display screen when said input pen is in the near position by said pen position recognizing means,

wherein the operation of said display processing means is released in response to predetermined coordinate specifying input performed by said input pen so as to display unchanged displayed images.