Iris recognition system

• US 20030156741A1
• Filed: 02/20/2003
• Published: 08/21/2003
• Est. Priority Date: 02/21/2002
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Won Hee, Chae, Jang Jin
• Application Number:
  US10/368,388
• Publication Number:
  US 20030156741A1
• Time in Patent Office: Days
• US Class Current: 382/117
• CPC Class Codes: A61B 3/1216 for diagnostics of the iris
• CPC Class Codes: A61B 3/152 for aligning
• CPC Class Codes: G06V 40/19 Sensors therefor
• CPC Class Codes: G06V 40/67 by interactive indications to the user

Abstract

The present relates to an eye position display housed in an iris recognition system and a method thereof. Particularly, the iris recognition system comprises: a board (PCB) including a controller for controlling emission of light; a light emitter with a LED mounted on the PCB for emitting a light and uniformly scattering and equalizing the intensity of the emitted light; a lens unit for maintaining a focal length of the emitted light from the light emitter, refracting and converging the light at a constant angle, and passing the light through a predetermined portion only so as to display a position where a user'"'"'s eye is should be; and a reflector unit for reflecting every wavelength band that passed through the lens unit except for a wavelength of a predetermined light.

Claims

1. An iris recognition system, comprising:

a board including a controller for controlling emission of light;

a light emitter mounted on the board for emitting a light and uniformly scattering and equalizing the intensity of the emitted light;

a lens unit for maintaining a focal length of the emitted light from the light emitter, refracting and converging the light at a constant angle, and passing the light through a predetermined portion only so as to display a position where a user'"'"'s eye is should be; and

a reflector unit for reflecting every wavelength band that passed through the lens unit except for a wavelength of a predetermined light.

2. The system according to claim 1, wherein the light emitter comprises a chip LED including a plurality of infrared ray LEDs and a diffusion sheet for uniformly diffusing the emitted light.

3. The system according to claim 2, wherein the chip LED is composed of a plurality of infrared ray LEDs in circular form.

4. The system according to claim 1, wherein the lens unit consists of circular-shaped lenses in form of LED mounted on the chip LED to be able to converge each LED light.

5. The system according to claim 4, wherein both ends of each LED lens are cut off to prevent refraction at tangential parts where the lenses of each LED are connected, whereby a plurality of lenses can be connected to each other.

6. The system according to claim 2, wherein the light emitter further comprises a hole mask for passing the light only through a predetermined part and equalizing intensity of the light passed through.

7. The system according to claim 1, wherein the lens unit further comprises a tube for keeping the light from the light emitter at a predetermined distance to focus the light.

8. The system according to claim 1, wherein the lens unit further comprises an instruction slit for manifesting a converged light in form of various masked patterns.

9. The system according to claim 8, wherein instructions can be given in at least one or diverse patterns.

10. The system according to claim 8, wherein the instructions shown on the reflector unit, namely cold mirror, are masked patterns, each pattern indicating a distance to the user.

11. The system according to claim 1, wherein the lens unit for converging the light comprises a lens for performing at least one of refraction and convergence of the light at a predetermined angle to enable the user to see the light with one eye only.

12. The system according to claim 1, wherein the user can see an emitted light from the light emitter, namely LED, only when the user sees the reflector unit, namely cold mirror, at a predetermined angle.

13. The system according to claim 1, wherein the lens hunt comprises a reflector hunt for reflecting every wavelength band except for a wavelength of the light emitted from the LED among visible rays of the light that passed through the lens, and passing infrared rays.

14. A method of recognizing an iris, comprising:

(1) pluralizing a distance between a user and an iris recognition system;

(2) if the user approaches the iris recognition system, emitting a light from at least one light emitter, and passing the light through a diffuser and a mask;

(3) allowing the user to see the refracted light from the lens;

(4) showing various instruction patterns in accordance with a view angle of the user toward a reflector unit or a distance between the user and the iris recognition system; and

(5) adjusting the distance from the user to the iris recognition system following the instructions manifested on the refractor unit.

15. The method according to claim 14, where the second step comprises the sub-steps of:

emitting a light from at least one light emitter as the user approaches the iris recognition system;

displaying a chip LED light only when the user looks into the reflector unit, namely cold mirror, perpendicularly, and

diffusing the LED light through a diffusion sheet and passing the same through the mask.

16. The method according to claim 14, wherein the third or fourth step comprises the sub-steps of:

passing the masked light through a tube for maintaining a focal length;

collecting the light through the lens'"'"' refraction to enable the user to see the refractor unit with only one eye; and

displaying various instruction patterns m accordance with a view angle of the user toward a reflector unit or a distance between the user and the iris recognition system