Selective frame rate switching

• US 9,367,148 B2
• Filed: 04/22/2014
• Issued: 06/14/2016
• Est. Priority Date: 04/22/2014
• Status: Active Grant

• Current Assignee: Pixart Imaging (Penang) Sdn. Bhd. (PixArt Imaging Incorporated)
• Original Assignee: Pixart Imaging (Penang) Sdn. Bhd. (PixArt Imaging Incorporated)
• Inventors: Lim, Kevin Len Li, Lee, Joon Chok
• Primary Examiner(s): HALEY, JOSEPH R
• Application Number:
  US14/258,022
• Publication Number:
  US 20150301630A1
• Time in Patent Office: 784 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06F 3/03543 Mice or pucks G06F3/03541 takes precedence
• CPC Class Codes: G06F 3/0383 Signal control means within the pointing device

Abstract

A method for selectively switching a frame rate of a mouse includes: setting a plurality of acceleration thresholds respectively corresponding to a plurality of frame rates at which the mouse is operated; operating the mouse at a first frame rate of the plurality of frame rates; determining a velocity of the mouse according to a difference between a first frame captured by the mouse at the first frame rate and a second frame following the first frame captured by the mouse at the first frame rate; determining an acceleration of the mouse between the first captured frame and second captured frame according to the velocity of the first frame, the velocity of the second frame, and the frame rate; comparing the acceleration with the plurality of thresholds; and directly switching the frame rate of the mouse to a frame rate which corresponds to the determined threshold.

Claims

1. A method for selectively switching a frame rate of a mouse, comprising:

setting a plurality of acceleration thresholds respectively corresponding to a plurality of frame rates at which the mouse is operated;

operating the mouse at a first frame rate of the plurality of frame rates;

determining a velocity of the mouse according to a difference between a first frame captured by the mouse at the first frame rate and a second frame following the first frame captured by the mouse at the first frame rate;

determining an acceleration of the mouse between the first captured frame and second captured frame according to the velocity of the first frame, the velocity of the second frame, and the frame rate;

comparing the acceleration with the plurality of thresholds; and

directly switching the frame rate of the mouse to a frame rate which corresponds to the determined threshold.

2. The method of claim 1, wherein the mouse is initially static and the first frame rate is a lowest frame rate of the plurality of frame rates.

3. The method of claim 1, wherein the mouse is initially moving and the first frame rate is selected according to a determined velocity of a captured frame prior to the first captured frame.