Systems and Methods for Sensing Fingerprints Through a Display

1 . A fingerprint swipe sensor, comprising:

a plurality of fingerprint sensor lines disposed on a first surface of an LCD (Liquid Crystal Display) covered on an opposite surface with motion sensing lines; and

a controller coupled to the fingerprint sensor lines to capture a fingerprint image when a user's finger is swiped about the fingerprint sensor lines.

2 . A fingerprint swipe sensor according to claim 1 , wherein the controller is further coupled to the motion sensing lines to capture finger motion on the LCD.

3 . A fingerprint swipe sensor according to claim 1 , wherein the plurality of fingerprint sensor lines are disposed under a mask layer on the opposite surface of the LCD.

4 . A fingerprint swipe sensor according to claim 1 , further comprising a mask layer disposed on the opposite surface of the LCD, wherein the mask layer includes an indication of a fingerprint swiping area.

5 . A Liquid Crystal Display (LCD) screen having a fingerprint swipe sensor, the LCD screen comprising:

an LCD module configured to produce a visible display;

a motion sensor circuit located on a first surface of the LCD module;

a protective layer located above the motion sensor circuit and configured to durably receive a user's finger surface;

fingerprint sensor lines disposed on a second surface of the LCD module, wherein the second surface of the LCD module is opposite the first surface of the LCD module; and

a controller coupled to the fingerprint sensor lines to capture a fingerprint image when a user's fingerprint is swiped about the sensor lines.

6 . An LCD screen according to claim 5 , further comprising an LCD controller coupled to the LCD module and configured to control the visible display of the LCD module.

7 . An LCD screen according to claim 6 , wherein the LCD controller is further coupled to the fingerprint sensor lines and further configured to control the fingerprint sensor lines.

8 . An LCD screen according to claim 5 , wherein the fingerprint sensor lines are disposed under a mask layer on the second surface of the LCD module.

9 . An LCD screen according to claim 8 , wherein the mask layer includes an identification of a fingerprint swiping area.

10 . A method of assembling an LCD display device having motion circuitry and fingerprint sensor circuitry, the method comprising:

providing a printed circuit board;

mounting an LCD controller on the printed circuit board;

mounting an LCD module above the printed circuit board;

applying motion sensor circuitry onto a first side of the LCD module;

applying a mask layer onto the first side of the LCD module; and

applying fingerprint sensor circuitry on a second side of the LCD module, wherein the second side of the LCD module is opposite the first side of the LCD module.

11 . A method according to claim 10 , further comprising mounting a user protective surface above the mask layer.

12 . A method according to claim 10 , wherein the LCD controller is configured to control the motion sensor circuitry and the fingerprint sensor circuitry.

13 . A method according to claim 12 , further comprising connecting the LCD controller to the motion sensor circuitry and the fingerprint sensor circuitry.

14 . A method according to claim 10 , further comprising mounting a fingerprint sensor controller on the printed circuit board.

15 . A method according to claim 14 , further comprising connecting the LCD controller to the motion sensor circuitry and connecting the fingerprint sensor controller to the fingerprint sensor circuitry.

16 . A method according to claim 10 , wherein applying fingerprint sensor circuitry on a second side of the LCD module includes bonding a fingerprint sensor to the second side of the LCD module using an optically clear adhesive.