Cursor Input Device With Dual Input Modes

• US 20090267905A1
• Filed: 04/26/2008
• Published: 10/29/2009
• Est. Priority Date: 04/26/2008
• Status: Abandoned Application

• Current Assignee: Waltop International Corp.
• Original Assignee: Waltop International Corp.
• Inventors: Hsu, Chung-Wen, Huang, Chia-Te, Huang, Cheng-Tai, Lai, Chang-Chin
• Application Number:
  US12/110,288
• Publication Number:
  US 20090267905A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• CPC Class Codes: G06F 3/0442 using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells
• CPC Class Codes: G06F 3/046 by electromagnetic means

Abstract

A cursor input device with dual input modes is provided, including a control computing module, a coordinate sensing module, a first analog multiplexing module, a first signal processing module, a second analog multiplexing module and a second signal processing module, where the coordinate sensing module further including a touch sensing loop unit and an electromagnetic sensing loop unit. The control computing module at least includes a microprocessor. The control computing module uses the first analog multiplexing unit and the first signal processing module to enable the electromagnetic sensing loop unit to perform signal scanning and processing, and uses the second analog multiplexing unit and the second signal processing module to enable the touch sensing loop unit to perform signal scanning and processing. In this manner, the user can use either touch input mode or electromagnetic pen input mode to control the cursor of the present invention to execute various the application software or operating system.

Claims

1. A cursor input device with dual input modes, comprising:

a control computing module, having at least a microprocessor;

a coordinate sensing module, having a touch sensing loop unit and an electromagnetic sensing loop unit;

a first analog multiplexing module, driven by said control computing module to activate said electromagnetic sensing loop unit of said coordinate sensing module to scan for signals;

a first signal processing module, for receiving and processing electromagnetic signal scanned by said electromagnetic sensing loop unit of said coordinate sensing module, and transmitting said processed signal to said control computing module;

a second analog multiplexing module, driven by said control computing module to activate said touch sensing loop unit of said coordinate sensing module to scan for signals; and

a second signal processing module, for receiving and processing finger touch signal scanned by said touch sensing loop unit of said coordinate sensing module, and transmitting said processed signal to said control computing module.

2. The device as claimed in claim 1, wherein said touch sensing loop unit and an electromagnetic sensing loop unit of said coordinate sensing module are of a layered structure.

3. The device as claimed in claim 1, wherein said touch sensing loop unit of said coordinate sensing module is of the projected capacitance touch panel type.

4. The device as claimed in claim 1, wherein said control computing module only activate either electromagnetic sensing loop unit or touch sensing loop unit of coordinate sensing module to scan for signals at a time, but not at the same time.

5. The device as claimed in claim 1, wherein said coordinate sensing module is made of a printed circuit board.

6. The device as claimed in claim 1, wherein said coordinate sensing module is made of a soft circuit board.

7. The device as claimed in claim 1, wherein said coordinate sensing module is made by forming related circuit on surface of glass.

8. The device as claimed in claim 1, wherein said control computing module outputs the computed signal data through a transmission interface, and said transmission interface is either of wired or wireless transmission mode.