STRAY-LIGHT-COUPLED BIOMETRICS SENSING MODULE AND ELECTRONIC APPARATUS USING THE SAME

• US 20140168167A1
• Filed: 12/12/2013
• Published: 06/19/2014
• Est. Priority Date: 12/19/2012
• Status: Active Grant

• Current Assignee: J-Metrics Technology Co., Ltd.
• Original Assignee: Bruce C.S. Chou
• Inventors: CHOU, Bruce C.S.
• Granted Patent: US 9,298,317 B2
• Time in Patent Office: Days
• US Class Current: 345/175
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06V 40/1335 Combining adjacent partial images (e.g. slices) to create a composite input or reference pattern; Tracking a sweeping finger movement
• CPC Class Codes: G06V 40/1341 Sensing with light passing through the finger

Abstract

A stray-light-coupled biometrics sensing module includes a light-transparent body, a display unit and an optical module. The light-transparent body has a front side and a backside. The front side is configured to support an organic object thereon. The display unit attached to the backside of the light-transparent body displays a frame. The optical module is attached to the backside of the light-transparent body through an adhesive, and is disposed adjacent to the display unit. First light rays of the frame emitted from an eye-viewing screen couple into the organic object through the light-transparent body. After travelling a short distance in the organic object, the first light rays couple out of the organic object and re-enter the light-transparent body as second light rays entering the optical module. The optical module senses the second light rays to generate a biometrics image signal. An electronic apparatus is also disclosed.

Claims

1. A stray-light-coupled biometrics sensing module, comprising:

a light-transparent body having a front side and a backside, wherein the front side is configured to support an organic object thereon;

a display unit, which is attached to the backside of the light-transparent body and displays a frame; and

an optical module, which is attached to the backside of the light-transparent body through an adhesive, and is disposed adjacent to the display unit, wherein;

first light rays of the frame couple into the organic object through the light-transparent body;

after travelling a short distance in the organic object, the first light rays couple out of the organic object and become second light rays, which enter the optical module through the light-transparent body; and

the optical module senses the second light rays to generate a biometrics image signal.

2. The sensing module according to claim 1, wherein the display unit is a liquid crystal display unit or an organic light-emitting diode display unit.

3. The sensing module according to claim 1, wherein the backside of the light-transparent body is formed with touch electrodes, and the light-transparent body and the display unit constitute a touch display, on which a user performs touch behaviors.

4. The sensing module according to claim 1, further comprising a control processing unit, which is electrically connected to the display unit and the optical module, and controls operations of the display unit and the optical module.

5. The sensing module according to claim 4, wherein the control processing unit controls the display unit to display frames, and the optical module generates multiple image signals according to different wavelengths of light rays of the frames, respectively.

6. The sensing module according to claim 5, wherein the control processing unit selects one of the image signals as the biometrics image signal.

7. The sensing module according to claim 5, wherein the control processing unit generates the biometrics image signal by performing optimization and mutual compensation on the image signals.

8. The sensing module according to claim 5, wherein the image signals comprise fingerprint image and finger vein image messages.

9. The sensing module according to claim 1, wherein the optical module comprises:

a housing; and

a first waveguide, a pupil, a second waveguide and an optical image sensor, all of which are disposed in the housing, wherein the second light rays sequentially travel through the first waveguide, the pupil and the second waveguide and enter the optical image sensor so that the biometrics image signal is generated.

10. The sensing module according to claim 1, further comprising:

an invisible light source providing invisible light to the light-transparent body coupling into the organic object, contacting with the light-transparent body, through the light-transparent body to increase selectivity of sensing functions.

11. The sensing module according to claim 1, wherein the light-transparent body comprises a movable portion, the optical module is attached to the movable portion of the light-transparent body through the adhesive, and the optical module comprises a button switch, to be triggered by the movable portion to provide a button function.

12. The sensing module according to claim 1, wherein a length of a sensing area on the light-transparent body is greater than or equal to (2.54/x)*2 centimeters, wherein x represents a resolution in a lengthwise direction of the length of the sensing area, and the resolution has an unit represented as dots per inch (dpi).

13. An electronic apparatus, comprising:

a casing;

a mainboard disposed in the casing; and

the sensing module according to claim 4 connected to the casing, wherein the control processing unit, the display unit and the optical module are electrically connected to the mainboard.

14. The electronic apparatus according to claim 13, further comprising:

a central processing unit, which is electrically connected to the mainboard and controls an operation of the control processing unit.

15. The electronic apparatus according to claim 13, further comprising:

a storage device, which is electrically connected to the mainboard and stores data;

a memory, which is electrically connected to the mainboard and temporarily stores data; and

a power module, which is electrically connected to the mainboard and provides power.

16. The electronic apparatus according to claim 13, wherein the display unit comprises a bright region close to the optical module, and a brightness of the bright region is higher than a brightness of a region other than the bright region.