INPUT INDUCING DEVICE AND INDUCING KEYBOARD

• US 20110291864A1
• Filed: 06/17/2010
• Published: 12/01/2011
• Est. Priority Date: 05/25/2010
• Status: Active Grant

• Current Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Inventors: GU, JUN, XIAO, JIN-WEI
• Granted Patent: US 8,305,240 B2
• Time in Patent Office: Days
• US Class Current: 341/22
• CPC Class Codes: G06F 3/02 Input arrangements using manually operated switches, e.g. using keyboards or dials
• CPC Class Codes: H03K 17/952 using inductive coils

Abstract

An input inducing device is provided. The input inducing device includes a winding, a current sensor, and a processing unit. Two ends of the winding are connected to the current sensor and form a closed-loop with the current sensor. When a magnetic object moves towards the winding, the winding cuts magnetic induction lines of the magnetic object to generate an induced current, the current sensor senses the induced current and generates a sensing signal according to the sensed induced current. The sensing signal is transmitted to the processing unit, which then implements a predetermined function according to the sensing signal.

Claims

1. An input inducing device comprising:

a winding, a current sensor, and a processing unit, two ends of the winding being connected to the current sensor and forming a closed-loop with the current sensor, the winding cutting magnetic induction lines of a magnetic object to generate an induced current when the magnetic object moves towards the winding, the current sensor sensing the induced current and generating a sensing signal according to the sensed induced current, the sensing signal being transmitted to the processing unit, the processing unit implementing a predetermined function according to the sensing signal.

2. The inducing input device as described in claim 1, further comprising an amplifier, the amplifier being connecting between the current sensor and the processing unit, before being transmitted to the processing unit, the sensing signal being amplified by the amplifier.

3. The inducing input device as described in claim 1, wherein the winding is fixed to a carrier.

4. The inducing input device as described in claim 1, wherein the magnetic object is a magnetic pen or a magnetic finger cover that covers the finger of the user.

5. The inducing input device as described in claim 1, wherein the winding is designed in a substantially swirl shape.

6. The inducing input device as described in claim 1, wherein the current sensor further detects the direction of the induced current and generates different sensing signal according to different direction of the induced current.

7. An inducing keyboard comprising:

a plurality of windings, being arrayed according to a keyboard input matrix;

a plurality of current sensors, two ends of each winding being connected to one current sensor and forming a closed-loop with the current sensor; and

a processing unit, all the current sensors being connected to the processing unit;

when a magnetic object moves towards one of the windings, the winding cutting magnetic induction lines of the magnetic object to generate an induced current, the corresponding current sensor sensing the induced current and generating a sensing signal according to the sensed induced current, the sensing signal being transmitted to the processing unit, the processing unit determining the position of the winding that generates the induced current in the keyboard input matrix and implements a function predetermined for the position of the winding.

8. The inducing keyboard as described in claim 7, further comprising an amplifier, the amplifier being connecting between current sensors and the processing unit, before transmitted to the processing unit, the sensing signal being amplified by the amplifier.

9. The inducing keyboard as described in claim 7, wherein the windings are fixed to a carrier.

10. The inducing keyboard as described in claim 7, wherein the magnetic object is a magnetic pen or a magnetic finger cover that covers the finger of the user.

11. The inducing keyboard as described in claim 7, wherein each winding is designed in a substantially swirl shape.

12. The inducing keyboard as described in claim 7, wherein the current sensor generates sensing signal when the magnetic object move towards the winding.