Abstract: An optical fingerprint recognition system is disclosed. The optical fingerprint recognition system comprises a processing circuit; and an image sensor comprising a pixel array; wherein in an enrollment operation, the processing circuit is configured to set a first exposure time and control the image sensor to capture a first fingerprint image according to the first exposure time and in a matching operation, the processing circuit is configured to set a second exposure time and control the image sensor to capture a second fingerprint image for the matching operation according to the second exposure time; wherein the first exposure time is longer than the second exposure time.

Abstract: A fingerprint sensing apparatus having a large-area sensing mechanism is provided that includes at least three optical fingerprint sensing circuits and a processing circuit. The at least three optical fingerprint sensing circuits are configured to perform sensing within a plurality of sensing areas to obtain a plurality of sensed images, wherein each of the sensing areas corresponds to one of the optical fingerprint sensing circuits. The processing circuit is electrically coupled to the optical fingerprint sensing circuits to receive the sensed images and is configured to splice the sensed images together to form an integrated sensed image.

Abstract: An operating method of an optical fingerprint capture apparatus includes: by the apparatus upon receipt of a scan command from a host, entering an exposure mode where an image sensor thereof is exposed to light carrying information of a fingerprint; by the apparatus upon complete exposure of the image sensor to the light, entering a sample mode where multiple pieces of pixel data that cooperatively represent an image of the fingerprint are obtained and written to a data buffer thereof; and by the apparatus at a predetermined output time point that is later than a start of the sample mode and earlier than an end of the sample mode, outputting an interrupt request to cause the host to start reading the pieces of pixel data from the data buffer.

Abstract: An object identifying method, suitable for an object identifying circuit configured to be disposed under a display panel, includes the following operations: displaying a black pattern by the display panel; generating a plurality of first sensing signals of a plurality of first sensor pixels of the display panel arranged in the black pattern; generating a plurality of second sensing signals of a plurality of second sensor pixels of the display panel arranged in a contact area with which the display panel contacting an object to be identified; adjusting voltage levels of the plurality of second sensing signals according to the plurality of first sensing signals; and generating an image corresponding to the object to be identified from the adjusted plurality of second sensing signals.

Abstract: An image sensor includes a sensor layer and a metal layer. The sensor layer includes a plurality of sensing elements arranged as a 2-dimensional array along a first direction and a second direction. The metal layer includes a plurality of metal wires configured to form a plurality of apertures superposed on the plurality of sensing elements. At least one of the plurality of metal wires forming the plurality of apertures is entirely disposed along a third direction different from the first direction and the second direction.

Abstract: A signal processing circuit for receiving a sensing signal from a sensor includes a capacitor group, an amplifier and a switch. The sensing signal consists of a common-mode part and a differential-mode part. The capacitor group, coupled to a node, includes an input capacitor for coupling the sensing signal to the node and a compensation capacitor for coupling a compensation signal to the node. The amplifier, coupled to the node, is configured to amplify the sensing signal coupled from the input capacitor. The switch is coupled between the node and the amplifier.

Abstract: The present invention provides a method of obtaining image data for an image sensing system. The image sensing system includes a sensing area having a plurality of sensing pixels. The method includes the steps of: scanning at least two groups of sensing pixels among the plurality of sensing pixels with at least two integration times, respectively, to obtain a plurality of sensing results; obtaining a selected integration time from one of the at least two integration times according to the plurality of sensing results; and scanning the plurality of sensing pixels except for the at least two groups of sensing pixels with the selected integration time, to obtain the image data.

Abstract: The present invention provides a method of obtaining image data for an image sensing system. The image sensing system includes a sensing area having a plurality of sensing pixels. The method includes the steps of: scanning at least two groups of sensing pixels among the plurality of sensing pixels with at least two integration times, respectively, to obtain a plurality of sensing results; obtaining a selected integration time from one of the at least two integration times according to the plurality of sensing results; and scanning the plurality of sensing pixels except for the at least two groups of sensing pixels with the selected integration time, to obtain the image data.

Abstract: A fingerprint sensing apparatus having a large-area sensing mechanism is provided that includes at least three optical fingerprint sensing circuits and a processing circuit. The at least three optical fingerprint sensing circuits are configured to perform sensing within a plurality of sensing areas to obtain a plurality of sensed images, wherein each of the sensing areas corresponds to one of the optical fingerprint sensing circuits. The processing circuit is electrically coupled to the optical fingerprint sensing circuits to receive the sensed images and is configured to splice the sensed images together to form an integrated sensed image.

Abstract: An image sensor includes a sensor layer and at least one metal layer. The sensor layer includes a plurality of sensing elements arranged as a 2-dimensional array along a first direction and a second direction. Each of the at least one metal layer includes a plurality of metal wires configured to form a plurality of apertures for passing lights to the plurality of sensing elements. At least one of the plurality of metal wires forming the plurality of apertures is disposed along a third direction different from the first direction and the second direction.

Abstract: The present invention discloses a method of finger touch authentication through a fingerprint sensor. The method includes obtaining a plurality of touch operations through the fingerprint sensor, detecting a pattern of the plurality of touch operations; comparing the pattern with a registered pattern to generate a comparison result, and authenticating the plurality of touch operations on the basis of the comparison result, wherein the pattern indicates at least one feature, and the fingerprint sensor is capable of authenticating a fingerprint of a user after or before the finger touch authentication.

Abstract: An optical fingerprint sensing module includes an image sensing device, a light source and a light shielding structure. The image sensing device is configured to sense light transmitted from a fingerprint of a finger on a display panel. The image sensing device includes a light sensing plane having a first geometric center. The light source includes a light emitting plane having a second geometric center. The first geometric center is separated from the second geometric center by a distance from 2 mm to 20 mm. The light shielding structure is disposed between the image sensing device and the light source. In examples, the optical fingerprint sensing module further includes a field angle controller to constrain light pass there through with a field angle of 5-60 degrees. A display device including an optical fingerprint sensing module is disclosed herein as well.

Abstract: A method of switching a control voltage of a photo sensor cell for a photo sensor includes when the photo sensor cell is switched from a turned-off state to an turned-on state, sequentially switching the control voltage to at least one first voltage provided by at least one first voltage supply, and switching the control voltage to a first target voltage provided by a first charging pump circuit; and when the photo sensor cell is switched from the turned-on state to the turned-off state, sequentially switching the control voltage to at least one second voltage provided by at least one second voltage supply or a ground voltage, and switching the control voltage to a second target voltage provided by a second charging pump circuit.

Abstract: The present invention discloses a method of finger touch authentication through a fingerprint sensor. The method includes obtaining a plurality of touch operations through the fingerprint sensor, detecting a pattern of the plurality of touch operations; comparing the pattern with a registered pattern to generate a comparison result, and authenticating the plurality of touch operations on the basis of the comparison result, wherein the pattern indicates at least one feature, and the fingerprint sensor is capable of authenticating a fingerprint of a user after or before the finger touch authentication.

Abstract: A sensor device includes a fingerprint sensing module, configured to sense a first raw image using a first exposure time; and an exposure time adjusting module. The exposure time adjusting module is configured to obtain a first image according to the first raw image; determine whether the first image comprises a flicker noise; and adjust the first exposure time when the first image comprises the flicker noise, so as to mitigate the flicker noise.

Abstract: A fingerprint and proximity sensing apparatus for fingerprint recognizing and proximity sensing is provided. The fingerprint and proximity sensing apparatus includes a display panel, a fingerprint sensor, and at least one proximity sensing light emitting diode. The fingerprint sensor has an optical sensing array. The optical sensing array is configured to receive a first light emitted from the display panel and a second light emitted from the at least one proximity sensing light emitting diode at different time periods. The first light and the second light have different ranges of wave length. A sensing process is also provided.

Abstract: An LED lighting device driven by boosting alternating current includes a mains AC input terminal, an LED lighting load, and an AC boosting driving circuit. The mains AC input terminal is configured to input mains electricity. The AC boosting driving circuit is electrically connected the mains AC input terminal and the LED lighting load, and is configured to perform forward boosting and reverse boosting for the mains electricity from the mains AC input terminal so that the voltage of the mains electricity is boosted to 1.5 to 6 times to be supplied to the LED lighting load. The LED lighting load achieves the same luminous efficiency, and the current flowing through the LED lighting load is reduced, thereby reducing the heat generated by the LED lighting load. The operating temperature of the LED lighting load is reduced. The service life is prolonged.

Abstract: A capacitive image sensing device is provided. The capacitive image sensing device includes a first charge amplifier, a second charge amplifier and a differential amplifier. The first charge amplifier is coupled to one of sensing electrodes of a sensor array. The differential amplifier has a first input terminal, a second input terminal and a differential output terminal pair. The first input terminal of the differential amplifier is coupled to the first charge amplifier. The second input terminal of the differential amplifier is coupled to the second charge amplifier.

Abstract: An image sensor includes a sensor layer and at least one metal layer. The sensor layer includes a plurality of sensing elements arranged as a 2-dimensional array along a first direction and a second direction. Each of the at least one metal layer includes a plurality of metal wires configured to form a plurality of apertures for passing lights to the plurality of sensing elements. At least one of the plurality of metal wires forming the plurality of apertures is disposed along a third direction different from the first direction and the second direction.

Abstract: An optical fingerprint recognition system is disclosed. The optical fingerprint recognition system comprises a processing circuit; and an image sensor comprising a pixel array; wherein in an enrollment operation, the processing circuit is configured to set a first exposure time and control the image sensor to capture a first fingerprint image according to the first exposure time and in a matching operation, the processing circuit is configured to set a second exposure time and control the image sensor to capture a second fingerprint image for the matching operation according to a second exposure time; wherein the first exposure time is longer than the second exposure time.