IMAGING DEVICE, DISPLAYING DEVICE, MOBILE TERMINAL DEVICE, AND CAMERA MODULE

• US 20140285420A1
• Filed: 12/06/2013
• Published: 09/25/2014
• Est. Priority Date: 03/22/2013
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: KAMIMURA, Takuya, YOSHIKAWA, Hiroyasu
• Application Number:
  US14/098,694
• Publication Number:
  US 20140285420A1
• Time in Patent Office: Days
• US Class Current: 345/156
• CPC Class Codes: G06F 3/013 Eye tracking input arrangements G06F3/015 takes precedence
• CPC Class Codes: G06F 3/0304 Detection arrangements using opto-electronic means constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042
• CPC Class Codes: H04N 23/21 from near infrared [NIR] radiation
• CPC Class Codes: H04N 23/56 provided with illuminating means
• CPC Class Codes: H04N 5/33 Transforming infrared radiation cameras or camera modules for generating image signals from infrared radiation H04N23/20; circuitry of SSIS for transforming infrared radiation into image signals H04N25/20

Abstract

An imaging device includes: a radiation unit configured to radiate light with a peak of a specific wavelength; a light receiver configured to have first sensitivity to a first wavelength longer than the specific wavelength, the first sensitivity being lower than second sensitivity to a second wavelength shorter than the specific wavelength; and a filter configured to block the second wavelength.

Claims

1. An imaging device comprising:

a radiation unit configured to radiate light with a peak of a specific wavelength;

a light receiver configured to have first sensitivity to a first wavelength longer than the specific wavelength, the first sensitivity being lower than second sensitivity to a second wavelength shorter than the specific wavelength; and

a filter configured to block the second wavelength.

2. The imaging device according to claim 1, wherein the light receiver is a CMOS sensor.

3. The imaging device according to claim 1, wherein radiation emitted at a wavelength of the light radiated by the radiation unit is reduced compared with adjacent wavelengths from sun light.

4. A displaying device comprising:

an imaging unit including;

a radiation unit configured to radiate light with a peak of a specific wavelength; and

a light receiver configured to have first sensitivity to a first wavelength longer than the specific wavelength, the first sensitivity being lower than second sensitivity to a second wavelength shorter than the specific wavelength and to have a filter to block the second wavelength, and

a detector configured to detect an eye gaze direction using positions of a pupil and cornea reflection obtained from an image taken by the imaging unit.

5. The displaying device according to claim 4, wherein the displaying device is assembled in an information processing device.

6. A mobile terminal device comprising:

an imaging unit including;

a radiation unit configured to radiate light with a peak around a specific wavelength; and

a light receiver configured to have first sensitivity to a first wavelength longer than around the specific wavelength, the first sensitivity being lower than second sensitivity to a second wavelength shorter than the specific wavelength, and

a detector configured to detect an eye gaze direction using positions of a pupil and cornea reflection obtained from an image taken by the imaging unit.

7. A camera module having a short wavelength cut filter that blocks components in wavelengths shorter than a wavelength at an emission intensity peak of illumination, and an image sensor with reduced sensitivity to components in wavelengths longer than the wavelength at the peak of illumination.

8. An imaging device comprising:

a light receiver disposed to receive light with a peak of a specific wavelength from an emitter, the light receiver having first sensitivity to a first wavelength longer than the specific wavelength and second sensitivity to a second wavelength shorter than the specific wavelength, the first sensitivity being lower than second sensitivity; and

a filter disposed between the emitter and the light receiver to block the second wavelength.