Coordinate detection device with improved operability and method of detecting coordinates

• US 20010017617A1
• Filed: 12/27/2000
• Published: 08/30/2001
• Est. Priority Date: 02/17/2000
• Status: Active Grant

• Current Assignee: Fujitsu Takamisawa Component Limited
• Original Assignee: Fujitsu Takamisawa Component Limited
• Inventors: Uchiyama, Takuya
• Granted Patent: US 7,307,622 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A coordinate detection device is provided, which device includes an input unit which has a surface thereof to which a coordinate value is input by an input means, a calculation unit which calculates a difference between previous and current coordinate values input by the input unit, and a setting unit which sets, in the calculation unit, a coordinate value input last before the input means is detached from the surface of said input unit as the previous coordinate value to a coordinate value input first after the input means is detached from the surface of the input unit.

Claims

1. A coordinate detection device comprising:

an input unit which has a surface thereof to which a coordinate value is input by an input means;

a calculation unit which calculates a difference between previous and current coordinate values input by said input unit; and

a setting unit which sets, in said calculation unit, a coordinate value input last before the input means is detached from the surface of said input unit as the previous coordinate value to a coordinate value input first after the input means is detached from the surface of said input unit.

2. The coordinate detection unit as claimed in

claim 1

, further comprising:

a determination unit which determines an operation mode of said input unit; and

a control unit which enables or disables said setting unit based on a determination result of said determination unit.

3. The coordinate detection device as claimed in

claim 2

, wherein said determination unit determines the operation mode of said input unit based on a contact area formed by a contact of the input means with the surface of said input unit.

4. The coordinate detection device as claimed in

claim 2

, wherein said determination unit determines the operation mode of said input unit based on a time during which the input means is detached from the surface of said input unit.

5. A method of detecting coordinates comprising the steps of:

(a) inputting a coordinate value to a surface of an input unit by an input means;

(b) calculating a difference between previous and current coordinate values input by said step (a); and

(c) setting, in said step (b), a coordinate value input last before the input means is detached from the surface of the input unit as the previous coordinate value to a coordinate value input first after the input means is detached from the surface of the input unit.

6. The method as claimed in

claim 5

, further comprising the steps of:

(d) determining an operation mode of said step (a); and

(e) enabling or disabling said step (c) based on a determination result of said step (d).

7. The method as claimed in

claim 6

, wherein said step (d) determines the operation mode of said step (a) based on a contact area formed by a contact of the input means with the surface of the input unit.

8. The method as claimed in

claim 6

, wherein said step (d) determines the operation mode of said step (a) based on a time during which the input means is detached from the surface of the input unit.