# US 9,753,312 B2 · Night vision enhancement using a wearable device

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- Number: US 9,753,312 B2
- Document ID: US9753312B2
- Status: Granted
- Kind: B2
- Application number: 14/849,255
- Filed: 2015-09-09
- Published: 2016-05-19
- Granted: 2017-09-05
- Earliest claimed: 2014-11-13
- Assignees: International Business Machines Corporation
- Applicants: International Business Machines Corporation
- Inventors: Stephen James Moore
- Web page: https://patentgrep.com/patent/US9753312B2

## CPC

- G02C 11/10: {Electronic devices other than hearing aids}
- G01J 1/0219: {Electrical interface; User interface}
- G01J 1/0238: {making use of sensor-related data, e.g. for identification of sensor or optical parts}
- G01J 1/16: using electric radiation detectors (G01J1/20 takes precedence)
- G01J 1/42: using electric radiation detectors (optical or mechanical part G01J1/04; by comparison with a reference light or electric value G01J1/10)
- G01J 1/4204: {with determination of ambient light (solar light G01J2001/4266)}
- G02C 11/04: Illuminating means
- G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00)
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)

## Abstract

There is provided a method for improving a night vision by operating a pair of eyeglasses comprising: a sensor that detects an intensity of a light near a user; a comparator device that compares the detected light intensity near the user against a dimness threshold; and an onboard projector in the pair of eyeglasses projecting a red light simultaneously into each eye of the user if the detected light intensity near the user becomes lower than the threshold.

## Claims

### Claim 1

A method for improving a night vision, the method comprising:
providing a pair of eyeglasses with a sensor that can detect an intensity of a light, the pair of eyeglasses adapted to be worn by a user;
detecting, by the sensor, the light intensity near the user;
comparing the detected light intensity near the user against a dimness threshold; and
projecting, by using a light projecting device associated with each lens of the pair of eyeglasses, a red light simultaneously into both eyes of the user if the detected light intensity near the user is below the threshold, said simultaneous projecting of red light into both eyes of the user to prevent a binocular rivalry and phoria.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the projecting comprises:
receiving a command from the user; and
using the light projecting devices, automatically projecting the red light simultaneously to the each lens of the pair of eyeglasses upon the receiving the command.

### Claim 3 (depends on 1)

The method according to claim 1, further comprising:
calibrating said eyeglasses to determine a threshold for a user, said calibrating comprising:
adjusting a red light projected in a dim ambient light;
measuring and recording the current luminance;
repeating the adjusting, measuring and luminance recording for different ambient light environments; and
obtaining an average value of the measured luminances as a dimness threshold for said eyeglasses.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the pair of eyeglasses includes a built-in camera for recording a luminance of an environment near the user as an image.

### Claim 5 (depends on 1)

The method according to claim 1, further comprising:
activating the projecting by one or more of:
a physical touch on the pair of eyeglasses, a physical motion of the user, or a voice of the user.