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US 8,913,012 B2Granted
Optical mouse and operating method thereof
AssigneePixart Imaging Inc.
InventorsRen-Hau Gu, Ming-Tsan Kao, Sen-Huang Huang
Life of this patent
Estimating the term…
Abstract
There is provided an operating method of an optical mouse including a first mode and a second mode. In the first mode, the optical mouse detects a finger displacement, a contact status and a physiological characteristic according to a plurality of image frames associated with a finger surface. In the second mode, the optical mouse calculates a mouse displacement according to a plurality of image frames associated with a work surface. There is further provided an optical mouse.
Claims17
An optical mouse configured to detect a physiological characteristic of a finger or a mouse displacement of the optical mouse with respect to a work surface, the optical mouse comprising:
- a first light source configured to emit light of a first wavelength to the finger and a second light source configured to emit light of a second wavelength to the finger;
- a light control unit configured to control the first and second light sources;
- at least one image sensor configured to
- capture reflected light from the finger to generate a plurality of first image frames associated with the finger corresponding to on-states of the first light source and a plurality of second image frames associated with the finger corresponding to on-states of the second light source, and
- capture reflected light from the work surface to generate a plurality of image frames associated with the work surface;
- and
- a processing unit configured to
- divide each of the first image frames into at least two parts and calculate an average brightness of each part;
- analyze the average brightness of the each part of the first image frames to obtain a first intensity variation;
- divide each of the second image frames into at least two parts and calculate an average brightness of each part;
- analyze the average brightness of the each part of the second image frames to obtain a second intensity variation;
- and
- calculate the physiological characteristic according to the first intensity variation and the second intensity variation.
10 more elements
An operating method of an optical mouse switching between a first mode and a second mode using a switching unit, the operating method comprising:
- in the first mode,
- providing light of a first wavelength and a second wavelength to a finger surface;
- capturing reflected light of the first wavelength to generate a plurality of first image frames and capturing reflected light of the second wavelength to generate a plurality of second image frames;
- dividing each of the first image frames and each of the second image frames into at least two parts and calculating an average brightness of each part;
- analyzing the average brightness of the each part of the first image frames to obtain a first intensity variation and analyzing the average brightness of the each part of the second image frames to obtain a second intensity variation;
- and
- calculating a physiological characteristic according to the first intensity variation and the second intensity variation;
- and
- in the second mode, calculating a mouse displacement according to a plurality of image frames associated with a work surface using the optical mouse.
6 more elements
An optical mouse, comprising:
- an optical finger mouse configured to detect at least one of a blood oxygenation and a heart rate of a user who has a finger operating the optical finger mouse, the optical finger mouse comprising:
- a first light source configured to emit light of a first wavelength to the finger;
- a second light source configured to emit light of a second wavelength to the finger;
- a light control unit configured to control the first light source and the second light source:
- an image sensor configured to receive reflected light from the finger at a sampling frequency to generate a plurality of first image frames corresponding to on-states of the first light source and a plurality of second image frames corresponding to on-states of the second light source;
- and
- a processing unit configured to
- divide each of the first image frames into at least two parts, calculate an average brightness of each part, and analyze the average brightness of the each part of the first image frames to obtain a first intensity variation;
- divide each of the second image frames into at least two parts, calculate an average brightness of each part, and analyze the average brightness of the each part of the second image frames to obtain a second intensity variation;
- and
- calculate at least one of the blood oxygenation and the heart rate according to the first intensity variation and the second intensity variation;
- an optical navigation device configured to detect a mouse displacement of the optical mouse with respect to a work surface;
- and
- a switching unit configured to switch the optical mouse to operate between the optical finger mouse and the optical navigation device.
11 more elements
Dependencies are inferred from the claim text.