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Optical fingerprint acquisition method, device and user terminal

A fingerprint collection and user terminal technology, applied in character and pattern recognition, instruments, computer components, etc., can solve the problems of reducing the accuracy of fingerprint collection, reducing the efficiency of fingerprint collection, and poor quality of fingerprint images

Inactive Publication Date: 2018-09-25
ONEPLUS TECH SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the existing optical fingerprint collection method, it is impossible to know whether the finger is kept within the fingerprint collection range during the collection process, and can only be confirmed indirectly through TP or pressure sensing, which makes it very easy for the user to appear during the fingerprint collection process. Poor fingerprint image quality or incomplete collection caused by removing the finger early or not placing the finger correctly will greatly reduce the accuracy of fingerprint collection, reduce the efficiency of fingerprint collection, and bring great inconvenience to optical fingerprint collection.

Method used

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  • Optical fingerprint acquisition method, device and user terminal
  • Optical fingerprint acquisition method, device and user terminal
  • Optical fingerprint acquisition method, device and user terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] refer to figure 2 , the first embodiment of the present invention provides an optical fingerprint collection method, including:

[0057] Step S10, when performing optical fingerprint collection on the fingerprint, detecting the signal input pin TS IN state in the fingerprint control IC; the TS IN state includes high and low;

[0058] Step S20, if the state of the TS IN is high, disable the interrupt detection, and stop the optical fingerprint collection of the fingerprint.

[0059] As mentioned above, the fingerprint control IC is the fingerprint control integrated circuit.

[0060] As mentioned above, the signal input pin is a pin, also called a pin, and it is called a Pin in English. It is the connection between the internal circuit of the integrated circuit (chip) and the peripheral circuit, and all the pins constitute the interface of the chip. A section of the end of a lead that is soldered to form a solder joint with a pad on a printed board. Pins can be divi...

Embodiment 2

[0066] refer to image 3 , the second embodiment of the present invention provides an optical fingerprint collection method, based on the above figure 2 In the first embodiment shown, after the step S10 "when collecting optical fingerprints, enable interrupt detection and detect the TS IN state", it also includes:

[0067] Step S30, if the TS IN state is low, continue to perform optical fingerprint collection on the fingerprint.

[0068] As mentioned above, it is further judged whether the user's finger remains within the fingerprint collection range during the fingerprint collection process through the high and low state of TS IN. When the state of TS IN is low, it is determined that the current user's finger is still in the fingerprint collection state state, still within the fingerprint collection range, and the finger has not left, and the optical fingerprint collection can continue.

[0069] Step S40, after the optical fingerprint collection of the fingerprint is compl...

Embodiment 3

[0074] refer to Figure 4 , the third embodiment of the present invention provides an optical fingerprint collection method, based on the above figure 2 In the second embodiment shown, after the step S40 "after the optical fingerprint collection of the fingerprint is completed, close the interrupt detection and detect the TSIN state", it also includes:

[0075] In step S60, if the TS IN state is high, it is determined that the fingerprint collection fails, and the information of the fingerprint collection failure is reported.

[0076] As mentioned above, after the fingerprint collection is completed, judge whether the fingerprint collection is successful again through the state of TS IN, the fingerprint control IC turns off the interrupt detection, and detects the TS IN state. Report failure message. As mentioned above, the reported failure message can be sending information about collection failure to the CPU, which is then processed by the CPU, or it can be sending prompt...

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Abstract

The invention provides an optical fingerprint acquisition method, device and a user terminal. The method comprises steps: when optical fingerprint acquisition is carried out on a fingerprint, the TS IN state of a signal input pin in a fingerprint control IC is detected, wherein the TS IN state comprises a high state or a low state; and if the TS IN state is high, interrupted detection is closed, and optical fingerprint acquisition on the fingerprint is stopped. Whether a finger leaves already is monitored through the hardware TS IN state, the finger can be constantly kept in a fingerprint acquisition range during a fingerprint acquisition process, the quality of a fingerprint image in the case of fingerprint acquisition is greatly enhanced and ensured, the fingerprint acquisition accuracyand the fingerprint acquisition efficiency are improved, and convenience is provided for optical fingerprint acquisition.

Description

technical field [0001] The present invention relates to the technical field of fingerprint collection, and more specifically, to an optical fingerprint collection method, device and user terminal. Background technique [0002] Fingerprint, because of its lifelong invariance, uniqueness and convenience, has almost become synonymous with biometric identification. Fingerprints are the uneven lines on the skin at the end of a person's fingers. The lines are arranged regularly to form different grain patterns. The starting point, ending point, joint point and bifurcation point of the ridge line are called the detail feature points of the fingerprint. [0003] Optical fingerprint collection technology is the oldest and most widely used fingerprint collection technology. The principle is the total reflection of light (MR). When the light hits the glass surface with fingerprints, the reflected light is obtained by CCD. The amount of reflected light depends on the depth of the rid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1324
Inventor 刘衍陶凯
Owner ONEPLUS TECH SHENZHEN
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