Wireless optical pointing device with a common oscillation circuit

• US 20050237303A1
• Filed: 12/06/2004
• Published: 10/27/2005
• Est. Priority Date: 04/21/2004
• Status: Active Grant

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: Yang, Jin-Hsin
• Granted Patent: US 7,443,383 B2
• Time in Patent Office: Days
• US Class Current: 345/166
• CPC Class Codes: G06F 3/0317 in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface
• CPC Class Codes: G06F 3/0383 Signal control means within the pointing device

Abstract

A wireless optical pointing device. The wireless optical pointing device comprises a photo sensor detecting a series of continuous images on an operating surface, a processing unit coupled with the photo sensor, processing the detected images, and outputting an image displacement signal accordingly, and a RF (Radio Frequency) unit coupled with the processing unit and transmitting a RF signal according to the image displacement signal, wherein the photo sensor and the RF unit receive a common oscillation frequency source and operate accordingly.

Claims

1. A wireless electronic device, comprising:

a photo sensor detecting a series of continuous images;

a processing unit coupled with the photo sensor, processing the detected images, and outputting an image displacement signal accordingly; and

a RF (Radio Frequency) unit coupled with the processing unit and transmitting a RF signal according to the image displacement signal;

wherein the photo sensor and the RF unit receive a common oscillation frequency source and operate accordingly.

2. The wireless electronic device as claimed in claim 1, wherein oscillation frequencies provided by the common oscillation frequency source are located in HF (High Frequency) or VHF (Very High Frequency) bands.

3. The wireless electronic device as claimed in claim 1, wherein the photo sensor and the RF unit are electrically coupled to a common crystal oscillator, so the photo sensor and the RF unit receive oscillation frequencies provided by the common crystal oscillator and operate accordingly.

4. The wireless electronic device as claimed in claim 1, wherein the photo sensor and the RF unit operate at substantially the same frequency.

5. The wireless electronic device as claimed in claim 1, wherein the photo sensor and the RF unit operate at different frequencies.

6. The wireless electronic device as claimed in claim 1, wherein the photo sensor and the processing unit are integrated in the same chip.

7. A wireless optical pointing device, comprising:

a photo sensor detecting a series of continuous images on an operating surface;

a processing unit coupled with the photo sensor, processing the detected images, and outputting an image displacement signal accordingly; and

a RF (Radio Frequency) unit coupled with the processing unit and transmitting a RF signal according to the image displacement signal;

wherein the photo sensor and the RF unit receive a common oscillation frequency source and operate accordingly.

8. The wireless optical pointing device as claimed in claim 7, wherein oscillation frequencies provided by the common oscillation frequency source are located in HF (High Frequency) or VHF (Very High Frequency) bands.

9. The wireless optical pointing device as claimed in claim 7, wherein the photo sensor and the RF unit are electrically coupled to a common crystal oscillator, receive oscillation frequencies provided thereby, and operate accordingly.

10. The wireless optical pointing device as claimed in claim 7, wherein the photo sensor and the RF unit operate at substantially the same frequency.

11. The wireless optical pointing device as claimed in claim 7, wherein the photo sensor and the RF unit operate at different frequencies.

12. The wireless optical pointing device as claimed in claim 7, wherein the processing unit and the RF unit are integrated in the same chip.

13. The wireless optical pointing device as claimed in claim 7, wherein the photo sensor and the processing unit are integrated in the same chip.

14. The wireless optical pointing device as claimed in claim 7, wherein the photo sensor, the processing unit, and the RF unit are integrated in the same chip.