Touch device and method for performing fingerprint detection on touch device

• US 10,452,166 B2
• Filed: 01/21/2016
• Issued: 10/22/2019
• Est. Priority Date: 10/30/2015
• Status: Active Grant

• Current Assignee: Shenzhen Goodix Technology Co., Ltd.
• Original Assignee: Shenzhen Goodix Technology Co., Ltd.
• Inventors: Chen, Weiwen, Deng, Gengchun, Ye, Jinchun
• Primary Examiner(s): Strege, John B
• Application Number:
  US15/548,846
• Publication Number:
  US 20180224955A1
• Time in Patent Office: 1,370 Days
• CPC Class Codes: G06F 1/3215 Monitoring of peripheral devices
• CPC Class Codes: G06F 1/3218 of display devices
• CPC Class Codes: G06F 1/325 Power saving in peripheral device
• CPC Class Codes: G06F 1/3287 by switching off individual functional units in the computer system
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/03547 Touch pads, in which fingers can move on a surface
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells
• CPC Class Codes: G06V 40/12 Fingerprints or palmprints
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

The present disclosure discloses a touch device and a method for performing fingerprint detection on the touch device, wherein the touch device includes: a touch plane configured to receive a user'"'"'s touch; a detection unit fixed to the touch plane and configured to detect the user'"'"'s touch; a fingerprint module configured to collect the user fingerprint; a control block, wherein the control block configured to enable the fingerprint module to collect the fingerprint of the user touched on the touch plane when the detection unit that the touch plane is touched by the user.

Claims

1. A touch device, comprising:

a touch plane configured to receive a touch of a user;

a detection unit comprising a touch sensor configured to detect the user'"'"'s touch;

a fingerprint module comprising a fingerprint sensor fixed to the touch plane and configured to collect a fingerprint of the user; and

a processor for executing computer-executable instructions stored in a non-transitory storage medium, when the computer-executable instructions are executed, the processor enables the fingerprint module to collect the fingerprint of the user'"'"'s touch on the touch plane, when the detection unit detects that the touch plane is touched by the user;

wherein the detection unit is further configured to detect a touch region of the user;

the processor is further configured to determine whether the area of the touch region of the user is within a pre-set range, and/or to determine whether the touch region of the user corresponds to the position of the fingerprint module, and enable a fingerprint collection function of the fingerprint module so as to collect the fingerprint of the user touched on the touch plane, when a determination result is positive;

wherein the detection unit comprises;

a plurality of row electrodes, and a plurality of column electrodes arranged on the touch plane, and a fourth calculation unit;

wherein the row electrodes and column electrodes are vertically interlaced with each other, and each of the row electrodes and column electrodes is provided with a switch,

wherein a signal of an electrode under a region touched by the user varies when the switch corresponding to the electrode is switched on;

wherein the fourth calculation unit is configured to;

switch on the row electrodes and/or the column electrodes in a pre-set cycle,

determine whether the touch plane is touched by a user according to the signals of the row electrodes and/or the column electrodes;

switch on at least one of the row electrodes and at least one of the column electrodes according to a pre-set order, and

determine the region touched by the user from the at least one of the row electrodes and the at least one of the column electrodes.

2. The touch device according to claim 1, wherein the detection unit is a pressure detection unit configured to detect the pressure generated by the user'"'"'s touch;

the touch plane to which the detection unit is fixed is a pressure touch plane.

3. The touch device according to claim 2, wherein, the processor is further configured to determine whether the pressure generated by the user'"'"'s touch exceeds a pre-set threshold;

and

the processor enables the fingerprint collection function of the fingerprint module so as to collect the fingerprint of the user'"'"'s touch on the touch plane, when the pressure generated by the user'"'"'s touch exceeds the pre-set threshold.

4. The touch device according to claim 2, wherein the detection unit is a mutual capacitive pressure detection unit which comprises a driving electrode for transmitting a signal, a sensing electrode for receiving the signal, and a first calculation unit;

when the touch plane deforms due to a user'"'"'s touch, a variation of a distance between the driving electrode and sensing electrode causes a variation of capacitance, and affect strength of the signal received by the sensing electrode;

wherein the first calculation unit calculates a pressure generated by the user'"'"'s touch according to the signal received by the sensing electrode.

5. The touch device according to claim 2, wherein the detection unit is a self-capacitance pressure detection unit which comprises an electrode for transmitting a signal and a second calculation unit;

the touch device has a device ground for receiving the signal;

when the touch plane deforms due to the user'"'"'s touch, the variation of the distance between the driving electrode and the device ground, and a capacitance variation is reflected, and affect the strength of the signal received by the device ground;

wherein the second calculation unit calculates the pressure generated by the user'"'"'s touch according to the signal received by the drive ground.

6. The touch device according to claim 2, wherein the detection unit is a resistive pressure detection unit comprising a resistance wire and a third calculation unit;

when the touch plane deforms due to the user'"'"'s touch, the variation of the resistance wire causes a variation of resistance thereof, and affect the strength of the signal passing through the resistance wire;

wherein the third calculation unit calculates the pressure generated by the user'"'"'s touch according to the signal passing through the pressure detection unit.

7. The touch device according to claim 1, further comprising:

a physical key arranged on a housing of the touch device and electrically connected with the processor, wherein the processor enables the fingerprint module to collect the fingerprint of the user when the physical key is triggered.

8. The touch device according to claim 1, wherein the touch plane is a touch pad or a touch screen.

9. A method for performing fingerprint detection on a touch device, the touch device comprising a touch plane configured to receive a touch of a user, a detection unit configured to detect the user'"'"'s touch, a fingerprint module fixed to the touch plane and configured to collect the user'"'"'s fingerprint;

wherein the method comprises;

detecting, by the detection unit, whether the touch plane is touched by the user; and

enabling the fingerprint module to collect the fingerprint of a user'"'"'s touch on the touch plane when the detection unit detects that the touch plane is touched by the user;

wherein, the method further comprises detecting by the detection unit a touch region of the user; and

determining, before enabling the fingerprint module to collect the fingerprint of the user'"'"'s touch on the touch plane, whether the area of the touch region of the user is within a pre-set range, and/or determining whether the touch region of the user corresponds to the position of the fingerprint module, and enable the fingerprint module to collect the fingerprint of the user'"'"'s touch on the touch plane when the determination result is positive,

wherein the detection unit comprises;

a plurality of row electrodes, and a plurality of column electrodes arranged on the touch plane, wherein the row electrodes and column electrodes are vertically interlaced with each other, each of the row electrodes and column electrodes is provided with a switch, and a signal of an electrode under a region touched by the user varies when the switch corresponding to the electrode is switched on;

wherein, the method further comprises;

switching on the row electrodes and/or the column electrodes in a pre-set cycle,

determining whether the touch plane is touched by a user according to the signals of the row electrodes and/or the column electrodes;

switching on at least one of the row electrodes and at least one of the column electrodes according to a pre-set order, and

determining the region touched by the user from the at least one of the row electrodes and the at least one of the column electrodes.

10. The method for performing fingerprint detection on a touch device according to the claim 9, wherein the detection unit is a pressure detection unit configured to detect the pressure generated by the user'"'"'s touch;

wherein the touch plane to which detection unit is fixed is a pressure touch plane.

11. The method for performing fingerprint detection on a touch device according to the claim 10, wherein before enabling the fingerprint module to collect the fingerprint of the user'"'"'s touch on the touch plane, the method further comprises:

determining whether the pressure generated by the user'"'"'s touch exceeds a pre-set threshold;

enabling the fingerprint module to collect the fingerprint of the user'"'"'s touch on the touch plane when the pressure generated by the user'"'"'s touch exceeds the pre-set threshold.

12. The method for performing fingerprint detection on a touch device according to claim 9, wherein the touch plane is a touch pad or a touch screen.