EYEBALL MOVEMENT DETECTION DEVICE

• US 20170312622A1
• Filed: 08/26/2015
• Published: 11/02/2017
• Est. Priority Date: 11/19/2014
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: ISHIHARA, Takehisa
• Granted Patent: US 10,086,268 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 3/113 for determining or recording eye movement
• CPC Class Codes: A61B 5/0075 by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy A61B5/0071 takes precedence
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: A61B 5/1128 using image analysis A61B5/1127 takes precedence
• CPC Class Codes: A61B 5/6803 Head-worn items, e.g. helmets, masks, headphones or goggles
• CPC Class Codes: A63F 13/213 comprising photodetecting means, e.g. cameras, photodiodes or infrared cells A63F13/219, A63F13/655 take precedence
• CPC Class Codes: A63F 13/65 automatically by game devices or servers from real world data, e.g. measurement in live racing competition
• CPC Class Codes: A63F 2300/1087 comprising photodetecting means, e.g. a camera
• CPC Class Codes: G06F 3/013 Eye tracking input arrangements G06F3/015 takes precedence

Abstract

An eyeball movement detection device (1) detects an eyeball movement of an eye in a side-to-side direction on the basis of a time shift in difference between an output from a far-infrared sensor (11) having directivity to an edge of an exposed surface of an eyeball on the side of the inner corner of the eye and an output from a far-infrared sensor (12) having directivity to an edge of the exposed surface of the eyeball on the side of the outer corner of the eye. This makes it possible to detect an eyeball movement in a noncontact manner, with a light weight, and with low power consumption.

Claims

1. An eyeball movement detection device comprising:

a first far-infrared sensor having directivity to a first edge of an exposed surface of an eyeball of an eye of a user;

a second far-infrared sensor having directivity to a second edge of the exposed surface of the eyeball, the second edge being opposed to the first edge;

a first output difference calculation section that calculates a difference between an output from the first far-infrared sensor and an output from the second far-infrared sensor; and

a detection section that detects an eyeball movement of the eyeball on the basis of a time shift in the difference thus calculated.

2. The eyeball movement detection device according to claim 1, wherein the detection section detects a direction of transfer of the user'"'"'s line of sight on the basis of a direction of a rising edge of the time shift in the difference.

3. The eyeball movement detection device according to claim 1, wherein the detection section detects an amount of transfer of the user'"'"'s line of sight on the basis of an angle of a rising edge of the time shift in the difference.

4. The eyeball movement detection device according to claim 1, wherein the first far-infrared sensor has directivity to the first edge of the exposed surface of the eyeball on a side of an inner corner of the eye, and

the second far-infrared sensor has directivity to the second edge of the exposed surface of the eyeball on a side of an outer corner of the eye.

5. The eyeball movement detection device according to claim 1, wherein the first far-infrared sensor has directivity to the first edge of the exposed surface of the eyeball on a side of an upper eyelid, and

the second far-infrared sensor has directivity to the second edge of the exposed surface of the eyeball on a side of a lower eyelid.