Optical mouse and method for preventing an erroneous operation thereof

• US 7,088,338 B2
• Filed: 07/28/2003
• Issued: 08/08/2006
• Est. Priority Date: 07/30/2002
• Status: Active Grant

• Current Assignee: Intellectual Discovery Co., Ltd.
• Original Assignee: ATLab, Inc.
• Inventors: Ahn, Jung Hong
• Primary Examiner(s): CHOW, DOON Y
• Application Number:
  US10/628,983
• Publication Number:
  US 20040021637A1
• Time in Patent Office: 1,107 Days
• Field of Search: 345/156, 345/157, 345163-166, 250/221
• 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 3/03543 Mice or pucks G06F3/03541 takes precedence

Abstract

Disclosed is an optical mouse comprising an image sensor, consisted of a plurality of pixels, for outputting signals accumulated in a given time as a pixel unit, an A/D converter, an image data calculating a moving value of the optical mouse, a system controller for controlling a data flow with an external system, an average value calculator calculating an average value, and a pick-up state discriminator for generating a pick-up state signal. In addition, the optical mouse further comprises a fluorescent lamp state discriminator for discriminating whether the optical mouse is in a fluorescent lamp state and generating a fluorescent lamp state signal.

Claims

1. An optical mouse comprising;

an image sensor, consisted of a plurality of pixels, for outputting signals accumulated in a given time as a pixel unit;

an A/D convener for receiving the output of the image sensor and converting the output into a digital signal format;

an image data processor for receiving the output of the A/D converter and calculating a moving value of the optical mouse;

a system controller for controlling data flow with an external system and receiving the image data processor;

an statistic value calculator for receiving the output of the A/D converter and calculating an statistic value; and

a pick-up stats discriminator for receiving the output of the stastic value calculator and generating a pick-up state signal,

wherein the pick-up state signal is used to make the moving value “

0”

.

2. The optical mouse according to claim 1, wherein the statistic value is obtained by averaging the pixel value.

3. The optical mouse according to claim 1, further comprising a fluorescent lamp state discriminator for receiving the pick-up state signal from the pick-up state discriminator, discriminating whether the optical mouse is in a fluorescent lamp state and generating a fluorescent lamp state signal, and controlling the moving value.

4. A meted for preventing en erroneous operation of an optical mouse comprising:

a first step of judging whether a pixel statistic value in one sample period is below the reference level continuously;

a second step of returning to a normal operating state when the pixel statistic value is not below the reference level continuously, and generating a pick-up state signal to make no moving state when the pixel statistic value is below the reference level continuously;

a third step of judging whether the pixel statistic value in one sample period is entered with a value not below the reference level continuously;

a fourth step of returning to the third step when the pixel statistic value in one sample period is not entered with a value not below the reference level continuously, and judging whether a variation of the pixel statistic value is corresponded to a fluorescent lamp state when a value not below the reference level is entered continuously; and

a fifth step of returning to the second step when a result of judgment of the fluorescent lamp state of the fourth step is the fluorescent lamp state, and returning to the normal operating state when the judgment is not the “

fluorescent lamp state”

.

5. The method for preventing an erroneous operation of an optical mouse according to claim 4, wherein the statistic value is obtained by averaging the pixel value.