Fingerprint identification device, touch panel, input device and fingerprint identification method
First Claim
1. A fingerprint identification device, comprising:
- a fingerprint identification module, a plurality of gate lines and a plurality of signal lines;
wherein the gate lines and the signal lines cross so as to define a plurality of sensing regions, and each of the sensing regions comprises a thin film transistor and a sensing electrode connected to the thin film transistor;
a gate electrode of the thin film transistor is connected to the corresponding gate line, a source electrode thereof is connected to the corresponding signal line, and a drain electrode thereof is connected to the sensing electrode;
the signal lines comprise signal-transmitting lines and signal-receiving lines, and each sensing electrode comprises a transmitting electrode connected to the signal-transmitting line and a receiving electrode connected to the signal-receiving line;
an electric field is generated between the transmitting electrode and the receiving electrode adjacent to the transmitting electrode, and a direction of the electric field is from the transmitting electrode to the receiving electrode adjacent to the transmitting electrode;
the fingerprint identification module is connected to each of the signal-receiving lines, and determines, by detecting an intensity of the electric field when a finger is in the electric field, a fingerprint of the finger; and
the sensing electrodes in an identical row comprise the transmitting electrodes and the receiving electrodes, and are connected to an identical gate line;
wherein the fingerprint identification device further comprises;
first amplifiers, arranged at the sensing regions corresponding to the transmitting electrodes, wherein an output terminal of each of the first amplifiers is connected to the transmitting electrode of the corresponding sensing region, and an inverting input terminal of each of the first amplifiers is connected to the drain electrode of the thin film transistor of the corresponding sensing region; and
second amplifiers, arranged at the sensing regions corresponding to the receiving electrodes, wherein an output terminal of each of the second amplifiers is connected to the drain electrode of the thin film transistor of the corresponding sensing region, and an inverting input terminal of each of the second amplifiers is connected to the receiving electrode of the corresponding sensing region.
1 Assignment
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Accused Products
Abstract
The present disclosure provides a fingerprint identification device, a touch panel, an input device and a fingerprint identification method. The fingerprint identification device includes a fingerprint identification module, gate lines and signal lines. The gate lines and the signal lines cross so as to define a plurality of sensing regions including a thin film transistors and a sensing electrode connected to the thin film transistors. A gate electrode of the thin film transistor is connected to the corresponding gate line, a source electrode is connected to the corresponding signal line, and a drain electrode is connected to the corresponding sensing electrode. The signal lines include signal-transmitting lines and signal-receiving lines, the sensing electrodes include transmitting electrodes and receiving electrodes. An electric field is generated between the transmitting electrode and the receiving electrode adjacent to the transmitting electrode, and a direction of the electric field is from the transmitting electrode to the receiving electrode adjacent to the transmitting electrode. The fingerprint identification module is connected to the signal-receiving lines, and determines, by detecting the intensity of the electric field when a finger is in the electric field, a fingerprint of the finger.
8 Citations
20 Claims
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1. A fingerprint identification device, comprising:
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a fingerprint identification module, a plurality of gate lines and a plurality of signal lines; wherein the gate lines and the signal lines cross so as to define a plurality of sensing regions, and each of the sensing regions comprises a thin film transistor and a sensing electrode connected to the thin film transistor; a gate electrode of the thin film transistor is connected to the corresponding gate line, a source electrode thereof is connected to the corresponding signal line, and a drain electrode thereof is connected to the sensing electrode; the signal lines comprise signal-transmitting lines and signal-receiving lines, and each sensing electrode comprises a transmitting electrode connected to the signal-transmitting line and a receiving electrode connected to the signal-receiving line;
an electric field is generated between the transmitting electrode and the receiving electrode adjacent to the transmitting electrode, and a direction of the electric field is from the transmitting electrode to the receiving electrode adjacent to the transmitting electrode;the fingerprint identification module is connected to each of the signal-receiving lines, and determines, by detecting an intensity of the electric field when a finger is in the electric field, a fingerprint of the finger; and the sensing electrodes in an identical row comprise the transmitting electrodes and the receiving electrodes, and are connected to an identical gate line; wherein the fingerprint identification device further comprises; first amplifiers, arranged at the sensing regions corresponding to the transmitting electrodes, wherein an output terminal of each of the first amplifiers is connected to the transmitting electrode of the corresponding sensing region, and an inverting input terminal of each of the first amplifiers is connected to the drain electrode of the thin film transistor of the corresponding sensing region; and second amplifiers, arranged at the sensing regions corresponding to the receiving electrodes, wherein an output terminal of each of the second amplifiers is connected to the drain electrode of the thin film transistor of the corresponding sensing region, and an inverting input terminal of each of the second amplifiers is connected to the receiving electrode of the corresponding sensing region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 18, 19)
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13. A touch panel, comprising a fingerprint identification device, wherein the fingerprint identification device comprises:
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a fingerprint identification module, a plurality of gate lines and a plurality of signal lines; wherein the gate lines and the signal lines cross so as to define a plurality of sensing regions, and each of the sensing regions comprises a thin film transistor and a sensing electrode connected to the thin film transistor; a gate electrode of the thin film transistor is connected to the corresponding gate line, a source electrode thereof is connected to the corresponding signal line, and a drain electrode thereof is connected to the sensing electrode; the signal lines comprise signal-transmitting lines and signal-receiving lines, and each sensing electrode comprises a transmitting electrode connected to the signal-transmitting line and a receiving electrode connected to the signal-receiving line;
an electric field is generated between the transmitting electrode and the receiving electrode adjacent to the transmitting electrode, and a direction of the electric field is from the transmitting electrode to the receiving electrode adjacent to the transmitting electrode;the fingerprint identification module is connected to each of the signal-receiving lines, and determines, by detecting an intensity of the electric field when a finger is in the electric field, a fingerprint of the finger; and the sensing electrodes in an identical row comprise the transmitting electrodes and the receiving electrodes, and are connected to an identical gate line; wherein the fingerprint identification device further comprises an environment noise detection unit configured to detect an environment electric field of each of the sensing regions, wherein the environment electric field is an electric field when the finger is not in touch with the sensing region, by which a reference electric field is acquired when determining the fingerprint of the finger, so as to determine the fingerprint of the finger based on an intensity of the reference electric field and the intensity of the electric field when the finger is in the electric field; wherein the environment noise detection unit further comprises a third amplifier and an environment noise sensing electrode; an output terminal of the third amplifier is connected to the environment noise sensing electrode, and an inverting input terminal of the third amplifier is connected to the fingerprint identification module. - View Dependent Claims (14, 17)
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20. A fingerprint identification device, comprising:
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a fingerprint identification module, a plurality of gate lines and a plurality of signal lines; wherein the gate lines and the signal lines cross so as to define a plurality of sensing regions, and each of the sensing regions comprises a thin film transistor and a sensing electrode connected to the thin film transistor; a gate electrode of the thin film transistor is connected to the corresponding gate line, a source electrode thereof is connected to the corresponding signal line, and a drain electrode thereof is connected to the sensing electrode; the signal lines comprise signal-transmitting lines and signal-receiving lines, and each sensing electrode comprises a transmitting electrode connected to the signal-transmitting line and a receiving electrode connected to the signal-receiving line;
an electric field is generated between the transmitting electrode and the receiving electrode adjacent to the transmitting electrode, and a direction of the electric field is from the transmitting electrode to the receiving electrode adjacent to the transmitting electrode;wherein the fingerprint identification device further comprises an environment noise detection unit configured to detect an environment electric field of each of the sensing regions, wherein the environment electric field is an electric field when the finger is not in touch with the sensing region, by which a reference electric field is acquired when determining the fingerprint of the finger, so as to determine the fingerprint of the finger based on an intensity of the reference electric field and the intensity of the electric field when the finger is in the electric field; wherein the environment noise detection unit further comprises a third amplifier and an environment noise sensing electrode; an output terminal of the third amplifier is connected to the environment noise sensing electrode, and an inverting input terminal of the third amplifier is connected to the fingerprint identification module.
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Specification