摘要:
A fingerprint detection apparatus and a fingerprint detection method are disclosed, wherein the fingerprint detection apparatus includes a collection module and a processing module, the collection module is configured to collect fingerprint information and generate a fingerprint detection signal, the processing module is configured to process the fingerprint detection signal and generate fingerprint image data, the processing module includes a frequency mixer, and the frequency mixer is configured to perform quadrature mixing and low pass filtering on the fingerprint detection signal, and to convert an alternating current signal of the fingerprint detection signal into a direct current signal. Therefore, the bandwidth of the fingerprint detection signal can be decreased, the noises in the fingerprint detection signal can be filtered out, the signal to noise ratio can be improved, the fingerprint detection sensitivity can be enhanced, and the anti-interference capacity can be increased, so that the adaptability of the fingerprint detecting apparatus to an application environment can be improved.
摘要:
A fingerprint sensor device for fingerprint detection includes an array of sensor pixels to capacitively couple with a touched portion of a finger to form an array of fingerprint associated capacitors having capacitive values indicative of a fingerprint. Each sensor pixel includes an output terminal configured to output an output signal that indicates a local capacitive coupling with the touched portion of the finger as part of fingerprint data for fingerprint detection; a capacitive sensing layer including an electrically conductive material that can be capacitively coupled to a local part of the touched portion of the finger, forming a fingerprint associated capacitor, the capacitive sensing layer operable to be coupled to the output terminal to cause the output signal; an integrated circuit layout layer that is electrically conductive; a fingerprint voltage generator; and a layout voltage generator.
摘要:
The present invention discloses a fingerprint detection apparatus and a mobile terminal. The fingerprint detection apparatus comprises a capacitive fingerprint sensor and a capacitive touch control chip which is electrically connected to the capacitive fingerprint sensor; wherein the capacitive fingerprint sensor is configured to collect fingerprint information and convert the fingerprint information to an analog signal; and the capacitive touch control chip is configured to convert the analog signal to a digital signal, and generate fingerprint image information according to the digital signal. As compared with the dedicated control chip in the related art, the capacitive touch control chip has mature design and manufacture technique, and thus the manufacture and application costs are lower. Particularly when the fingerprint detection apparatus is applied in a capacitive touch control terminal, the capacitive touch control chip of the capacitive touch control terminal may be used to achieve detection and identification of the fingerprint, which significantly improves the technical integration and reduces the application cost.
摘要:
The present invention provides a fingerprint detection circuit, a sensor, and a touch screen. The fingerprint detection circuit includes: a detection electrode, where a first capacitance is formed between a finger and the detection electrode, a second capacitance is formed between the finger and a virtual ground, and a parasitic capacitance is formed between the detection electrode and the virtual ground; an amplifier, where an inverting input end of the amplifier is connected to the detection electrode and a non-inverting input end of the amplifier is connected to an excitation signal; and a feedback capacitance, where one end of the feedback capacitance is connected to the inverting input end of the amplifier, the other end of the feedback capacitance is connected to an output end of the amplifier, and the output end of the amplifier outputs an output signal of the fingerprint detection circuit. According to the fingerprint detection circuit in the embodiments of the present invention, all signals of the circuit are in a detection chip and there is no need to connect an excitation signal to a finger of a user through an external electrode, making fingerprint detection applicable to more scenarios. For example, a detection electrode arranged in an array may be placed under the screen glass of a mobile terminal.
摘要:
Methods, systems, and devices are disclosed for optical sensing and tracking of eye movement. In one aspect, a method for tracking the movement of an eye includes emitting a first modulated light and a second modulated light toward an eye of a user, wherein the first modulated light and the second modulated light have substantially the same modulation frequency, but the modulation phases of the two modulated lights are substantially opposite to each other; receiving at a photodetector module a returned light including at least a partial retroreflected light from the eye of the user based on the first and second modulated lights; and processing the output signal from the photodetector module to determine positional and dimensional parameters of the eye of the user based at least on the partial retroreflected light corresponding to the first and second modulated lights.
摘要:
Embodiments of the present application provide a force detection method, a force detection apparatus and an electronic terminal thereof. The force detection method includes: acquiring an output electrical signal of a voltage dividing capacitor formed between a driving electrode and a force sensing electrode, and an output electrical signal of a force detecting capacitor formed between the force sensing electrode and a reference electrode, determining force feature data when a force is applied to the force sensing electrode based on the output electrical signal of the voltage dividing capacitor and the output electrical signal of the force detecting capacitor. Based on the present application, the force detection model is simplified, the voltage variation amount is increased, the impacts caused by environment changes to the force performance are mitigated or eliminated, and environment self-calibration and self-calibration of an initial gap between the force sensing electrode and the reference electrode are implemented.
摘要:
In one aspect, a fingerprint sensor device for fingerprint detection includes a light source configured to emit light at a wavelength. The fingerprint sensor device includes an array of sensor pixels to acquire an optical image indicative of a fingerprint. Each sensor pixel includes a photodetector to detect the emitted light reflected off of a target finger and output an optical signal based on the detected reflected light. Each sensor pixel includes a collimator disposed over the photodetector to direct the reflected light in a substantially vertical direction from above the photodetector toward the photodetector. Each sensor pixel includes sensor signal detection circuitry communicatively coupled to the photodetector to acquire the outputted optical signal.
摘要:
The present invention provides an output conversion circuit and a fingerprint identification system. The output conversion circuit includes: a comparator, a counter, and a reference signal generator, where the counter includes: a first input end, configured to receive a first output signal; a second input end; and an output end, configured to generate a comparison output signal; the counter is connected to the output end of the comparator, and configured to generate a second output signal; and the reference signal generator is connected to the second input end, and configured to generate a reference signal, where the reference signal generator includes a random digit generator configured to generate a random digit, and the reference signal is associated with the random digit; where the comparator generates the comparison output signal according to the first output signal and the reference signal. The output conversion circuit provided in the present invention has an advantage of improving statistical linearity of an output signal.
摘要:
The present invention discloses a method and system for processing input fingerprint information, and a mobile terminal thereof. The method includes the following steps: a fingerprint information identification step: when it is scanned that fingerprint information is input, identifying whether a fingerprint template matching with the input fingerprint information is present in a fingerprint database, wherein the fingerprint database includes a plurality of pre-registered fingerprint templates, each fingerprint template being associated with an application operation; and an operation execution step: if it is identified that a fingerprint template matching with the input fingerprint information is present in the fingerprint database, performing the application operation associated with the identified fingerprint template. According to the present invention, a plurality of fingerprints are pre-registered as a fingerprint template, and then an application operation is set to be associated with each fingerprint template. In this way, no matter in a screen on or screen off state, the associated application may be started, such that a user experiences more convenient and quicker services. In addition, since various application operations are all associated with specific fingerprint information, the privacy is better protected.
摘要:
The present invention discloses an encryption method and an encryption apparatus. The encryption method comprises: generating an AES initial key by using an SAES encryption algorithm, and expanding the AES initial key to obtain an AES encryption key; and encrypting information to be encrypted by using the AES encryption key according to an AES encryption algorithm to generate encrypted data. As such, the AES encryption key is encrypted by introducing the SAES algorithm, which increases the difficulty in cracking the AES encryption key. An attacker may crack the AES by firstly cracking the AES encryption key, which increases the overall difficulty in cracking the AES encrypted data. Further, the SAES encryption algorithm and the AES encryption algorithm are implemented by means of an ASIC integrated in an encryption chip. Since the ASIC is a customized circuit and no code or program can be intercepted, the risk that the SAES and the AES are cracked due to interception of the program or code is prevented. Finally, data security is improved.