Abstract: A processing device for executing convolution neural network computation and an operation method thereof are provided. The convolution neural network computation includes a plurality of convolutional layers. The processing device includes an internal memory and a computing circuit. The computing circuit executes convolution computation of each convolutional layer. The internal memory obtains weight data of a first convolutional layer from an external memory, and the computing circuit uses the weight data of the first convolutional layer to execute the convolution computation of the first convolutional layer. During a period when the computing circuit is executing the convolution computation of the first convolutional layer, the internal memory obtains weight data of a second convolutional layer from the external memory, so as to overwrite the weight data of the first convolutional layer with the weight data of the second convolutional layer.

Abstract: A sum of products calculation circuit and a sum of products calculation method thereof are provided. A first input terminal of a differential amplifier is coupled to a reference voltage. A first adjustable resistance unit and a first parallel resistance unit are connected in parallel between a second input terminal of the differential amplifier and an operating voltage. A second adjustable resistance unit and a second parallel resistance unit are connected in parallel between the second input terminal of the differential amplifier and ground. A processing circuit adjusts resistance values of the first adjustable resistance unit and the second adjustable resistance unit, and calculates a sum of the products of a first input parameter and a second input parameter according to the resistance value of the second adjustable resistance unit corresponding to a situation in which an output of the differential amplifier is in transition.

Abstract: The invention provides a fingerprint sensor including a sensing array. The sensing array includes a plurality of sensing units to form a plurality of sensing regions arranged in an array. Each of the plurality of sensing regions includes at least one column of sensing units. A first part of the plurality of sensing regions receives a power signal to perform fingerprint sensing. A second part of the plurality of sensing regions does not receive a power signal. Therefore, the fingerprint sensor of the invention can provide a fast and energy-saving large-area fingerprint sensing effect.

Abstract: The invention provides a fingerprint sensing device. A control circuit controls a part of point light sources to irradiate a fingerprint of a user. Reflected light generated by using the plurality of point light sources to irradiate the fingerprint of the user forms a light-emitted pattern including a plurality of reflected light patterns on a sensing layer, wherein each of the reflected light patterns is provided by a corresponding point light source, and each of the sensing units senses the reflected light patterns corresponding to at least two point light sources.

Abstract: A full-screen electronic device with a fingerprint sensing function and a fingerprint sensing method are provided. The full-screen electronic device includes a panel module, a plurality of fingerprint sensors and a control unit. The plurality of fingerprint sensors are aligned with the panel module and distributed into a plurality of scan regions in an array. The fingerprint sensing method includes the following steps. Firstly, a concerned information about a concerned position of the display panel is generated. After the control unit receives the concerned information, the control unit defines the scan regions of the concerned position as a first scan set according to the concerned information. Then, the control unit controls the fingerprint sensors corresponding to the first scan set according to a first scan strategy.

Abstract: The disclosure provides a fingerprint sensing device, including a glass cover plate, a display panel, a fingerprint sensing module, a liquid crystal layer module, and a control circuit. The display panel is disposed below the glass cover plate, and provides illumination light to a finger. The fingerprint sensing module is disposed below the glass cover plate, and senses light reflected by the finger. The liquid crystal layer module is disposed on the fingerprint sensing module. The control circuit is coupled to the liquid crystal layer module, and drives the liquid crystal layer module to focus the illumination light to the finger or focus the light reflected by the finger to the fingerprint sensing module.

Abstract: A current-driven pixel circuit and a related image sensor are disclosed. The image sensor includes a pixel circuit array and a current reference circuit. The pixel circuit array includes a plurality of pixel circuits, each having a photo detecting element and a power element. The photo detecting element changes impendence in response to illumination. The power element is arranged to selectively provide a driving current to the photo detecting element. The current reference circuit includes a current source, wherein the power element provides the driving current according to a reference current of the current source, respectively.

Abstract: A readout circuit for reading sensed signals of a pixel array. The readout circuit includes: an operational amplifier, a plurality of switching devices and a computation circuit. The operational amplifier is arranged to generate an output signal in each amplifier output cycle. In each amplifier output cycle, each of the switching devices is controlled by a switch controlling signal to selectively couple pixel circuits to the differential input terminals of the operational amplifier. The computation circuit is arranged to the recover a plurality of sensed signal respectively corresponding to a plurality of pixel circuits. In each amplifier output cycle, at least two of the switching devices are turned on, such that the operational amplifier receives the sensed signals of at least two pixel circuits in the pixel array simultaneously and sums the sensed signals of the at least two pixel circuits to generate the output signal.

Abstract: The invention provides a fingerprint sensor including a sensing array. The sensing array includes a plurality of sensing units to form a plurality of sensing regions arranged in an array. Each of the plurality of sensing regions includes at least one column of sensing units. A first part of the plurality of sensing regions receives a power signal to perform fingerprint sensing. A second part of the plurality of sensing regions does not receive a power signal. Therefore, the fingerprint sensor of the invention can provide a fast and energy-saving large-area fingerprint sensing effect.

Abstract: The invention provides an optical sensor and an image sensing method. The optical sensor includes a sensing array, a sampling circuit and an operational circuit. The sensing array performs an exposure operation to sense an object and output a plurality of first sensing signals, and performs a reset operation to output a plurality of second sensing signals. The sampling circuit outputs a plurality of first pixel data of an object image according to the plurality of first sensing signals, and outputs a plurality of second pixel data according to the plurality of second sensing signals. The operational circuit executes a subtraction operation on the plurality of first pixel data and the plurality of second pixel data to obtain a denoised object image. Therefore, the sampling circuit and the image sensing method of the invention can effectively obtain the denoised object image.

Abstract: The invention provides a fingerprint sensing device. A control circuit controls a part of point light sources to irradiate a fingerprint of a user. Reflected light generated by using the plurality of point light sources to irradiate the fingerprint of the user forms a light-emitted pattern including a plurality of reflected light patterns on a sensing layer, wherein each of the reflected light patterns is provided by a corresponding point light source, and each of the sensing units senses the reflected light patterns corresponding to at least two point light sources.

Abstract: A fingerprint sensing module includes a fingerprint sensing pixel array, a plurality of column circuitries and a constant current circuit. The fingerprint sensing pixel array includes a plurality of sensing pixels in an array arrangement. Each column circuitry is electrically coupled to a row of the sensing pixels via a corresponding row signal line. The constant current circuit generates a bias voltage to the column circuitries according to a reference current. In response to the bias voltage level, a row output current provided by each column circuitry and flowing through each row of the sensing pixels is equal to or close to the reference current. Since the row output current coincides with the reference current, the row output current is not adversely affected by the external factors.

Abstract: An optical fingerprint sensing apparatus is provided. A control circuit controls a first selection circuit to output at least one of fingerprint sensing signals on sensing signal lines, and controls a second selection circuit to output at least one of background noise signals on dummy sensing signal lines, so that the first selection circuit and the second selection circuit simultaneously output the fingerprint sensing signal and the background noise signal, respectively. The signal processing circuit cancels background noise of the fingerprint sensing signals according to the background noise signal.

Abstract: The disclosure provides a fingerprint sensing device, including a glass cover plate, a display panel, a fingerprint sensing module, a liquid crystal layer module, and a control circuit. The display panel is disposed below the glass cover plate, and provides illumination light to a finger. The fingerprint sensing module is disposed below the glass cover plate, and senses light reflected by the finger. The liquid crystal layer module is disposed on the fingerprint sensing module. The control circuit is coupled to the liquid crystal layer module, and drives the liquid crystal layer module to focus the illumination light to the finger or focus the light reflected by the finger to the fingerprint sensing module.

Abstract: An ion wind generating device includes a high voltage power supply, a capacitor connected in parallel to the high voltage power supply, a first metal cone connected in series to the high voltage power supply, a ground plate disposed on the same axis as the first metal cone, a starter motor, and a second metal cone disposed on a connecting shaft. The starter motor includes a rotating shaft and a connecting shaft perpendicular to the rotating shaft. After second metal cone moves to be located between first cone and the ground plate, the starter motor stops rotating. The high voltage power supply charges the capacitor with the high voltage power, and the capacitor discharges the first metal cone. When the second metal cone is located between the first metal cone and the ground plate, the first metal cone causes the second metal cone to discharge to generate an ionic wind.