Abstract: An array substrate is provided. The array substrate includes a first base material, and a display circuit layer and a recognition circuit layer laminated on the first base material. The display circuit layer includes multiple gate lines, multiple data lines, and multiple thin-film transistors (TFT). Projections of the multiple gate lines on the first base material and projections of the multiple data lines on the first base material define multiple sub-pixel projection areas. Each of projections of the multiple TFTs on the first base material falls into a corresponding area of the multiple sub-pixel projection areas. The recognition circuit layer includes multiple photoelectric sensors. Projections of the multiple photoelectric sensors on the first base material fall into different areas of the sub-pixel projection areas. The photoelectric sensor is configured to sense target lights carrying user fingerprint information. A display screen and an electronic device are further provided.

Abstract: Various examples related to sinusoidal pulse width modulation (SPWM) techniques for harmonic and electromagnetic interference (EMI) noise suppression are provided. In one example, a method includes applying a DC offset to a sinusoidal modulation waveform to change an average duty cycle of a switching circuit; and controlling switching of an array of switches of the switching circuit based at least in part upon the offset sinusoidal modulation waveform and a carrier waveform, thereby reducing total energy. In another example, a system includes a switching circuit with an array of semiconductor switches that control application of a voltage source to a load; and controller circuitry that can control switching of the array of semiconductor switches by applying a DC offset to a sinusoidal modulation waveform to change an average duty cycle of the switching circuit.

Abstract: Various examples related to electromagnetic interference (EMI) energy mitigation techniques are provided. In one example, a method includes adjusting switching angles of a switching circuit based on resolution bandwidths (RBWs) associated with an EMI frequency spectrum of the switching circuit and weight coefficients of the RBWs. The total energy of the switching circuit can be reduced by adjusting an average duty cycle of the switching circuit. EMI spectrum information can be determined based upon switching angles of a switching circuit. For example, weighted errors corresponding to differences between reference harmonic magnitudes and determined harmonic magnitudes can be determined. In response to a comparison of a maximum weighted error to a preset tolerance threshold, adjustment to the switching angles can be determined and/or applied.

Abstract: A display screen includes a display layer. The display layer has a fingerprint recognition area and a peripheral area adjacent to the fingerprint recognition area. The fingerprint recognition area is provided with first driving components. The peripheral area is provided with second driving components. An interval at which the first driving components are arranged is greater than an interval at which the second driving components are arranged. A display device includes the display screen and an optical fingerprint module located on one side of the display screen intended to away from a user. The optical fingerprint module is located in a position corresponding to the fingerprint recognition area, where light signals transmitted or received pass through the fingerprint recognition area.

Abstract: The present disclosure provides a display screen, a display device, and a mobile terminal. The display screen includes a light-shielding panel and a display panel. The light-shielding panel is provided with a hollow-out groove, and the hollow-out groove is configured so that a fingerprint module is fastened in the hollow-out groove. The display panel is superposed on a side of the light-shielding panel towards a user. A side of the display panel towards the light-shielding panel is provided with an ink layer. An orthographic projection area of the ink layer on the light-shielding panel coincides with the hollow-out groove. Chromaticity of the ink layer is consistent with chromaticity of a side of the light-shielding panel towards the display panel.

Abstract: The present disclosure provides an electronic device, a storage medium, and an image processing method, wherein, the electronic device includes a processing unit, a camera and a display screen covering the camera. Wherein, the display screen includes a light transmission area and a non-light transmission area, is configured to display a first image on the non-light transmission area under the control of the processing unit. The camera is disposed under the light transmission area, includes a projection assembly and an imaging assembly both electrically connected to the processing unit. The projection assembly is configured to project a second image on the display screen under the control of processing unit thereby to display the image on the light transmission area of the display screen, and the imaging assembly is configured to capture a third image through the light transmission area of the display screen.

Abstract: Methods and systems for image processing are provided. A target image may be acquired, wherein the target image may include a plurality of elements, an element of which may correspond to a pixel or a voxel. The target image may be decomposed into at least one layer, wherein the at least one layer may include a low frequency sub-image and a high frequency sub-image. The at least one layer may be transformed. The transformed layer may be reconstructed into a composite image.

Abstract: A display screen is provided, including a display layer and a first light shielding layer. The display layer has a display surface, the first light shielding layer is arranged on the display surface and has a fingerprint recognition area, the fingerprint recognition area includes at least one first through hole sensing signals emitted and received by a fingerprint unit located below the display screen can be transmitted through the first through hole. A display device is provided, including the display screen and an optical fingerprint unit. The optical fingerprint unit is disposed at a side of the display layer away from the first light shielding layer and located at a position corresponding to an optical fingerprint recognition area. The fingerprint unit includes a light emitter and a light inductor, and a light signal emitted by the light emitter is transmitted to a fingerprint and received by the light inductor after being reflected by the fingerprint. A mobile terminal is provided.

Abstract: There is provided p-type organic polymers of general formula I. The polymers may be useful as semi-conducting material. Thus, thin films and devices comprising such polymers are also provided.

Abstract: Three-Dimensional (3D) display device and method are disclosed. The device can include: a Light-Emitting Diode (LED) display, configured to display an image; a light path control structure including a multilayer pinhole type structure, configured to control emitting directions of light paths of the image to form 3D light field information, wherein multiple groups of pinhole arrays are arranged on each layer of the pinhole type structure; and a holographic function screen, configured to perform diffusion imaging on the 3D light field information to form a 3D image, wherein the LED display, the light path control structure and the holographic function screen are sequentially configured. The technical problems of the related art are solved.

Abstract: A method for controlling unlocking is provided. A password matching process is performed on a screen unlock password, an interrupt request is triggered and an original fingerprint image is acquired, and a fingerprint identification process is performed on the original fingerprint image, when a terminal device is in a screen-off state and the screen unlock password input by a user and a touch-press operation of the user on a fingerprint identification module of the terminal device are detected. A screen of the terminal device is lit up, when the password matching process is successful and the fingerprint identification process is successful.

Abstract: Systems and methods for determining a breast region in a medical image are provided. The methods may include obtaining a first image relating to the breast region, determining a first region including a first plurality of pixels in the breast region, determining a second region including a second plurality of pixels relating to an edge of the breast region, and determining the breast region by combining the first region and the second region. The second plurality of pixels may include at least a portion of the first plurality of pixels.

Abstract: An unlocking control method includes the follows. A password matching process is performed on a screen unlock password, an interrupt request is triggered, an original fingerprint image is acquired, and a fingerprint identification process is performed on the original fingerprint image, when a terminal device is in a screen-off state and the screen unlock password input by a user and a press operation of the user on a fingerprint identification module of the terminal device are detected. A screen of the terminal device is lit up, when the password matching process is matched and the fingerprint identification process is successful.

Abstract: A proximity-detection method, a non-transitory computer readable medium and an electronic device are disclosed. The proximity-detection method is applied to the electronic device. The electronic device may include a display screen and an infrared-light proximity sensor covered by the display screen and configured to detect whether an object is proximity to the electronic device, the display screen has a capability of allowing infrared lights to pass through. The proximity-detection method may include setting an operation timing of the display screen as a target timing when the infrared-light proximity sensor is enabled, wherein the target timing comprises a target duration and the display screen is controlled to emit no lights during the target timing; controlling the infrared-light proximity sensor to emit the infrared lights during the target duration; and performing proximity detection based on the infrared lights.

Abstract: Provided are a cascaded photovoltaic grid-connected inverter and a control method and control device thereof. The method includes: determining whether at least one of inverter units of the inverter is over-modulated; if yes, calculating a maximum reactive power and a minimum reactive power permitted to be injected to a power grid in a situation that a power factor of a system is not less than a minimum permitted value; simulating an operation state of the inverter after the maximum reactive power is injected to the power grid and determining whether each of the inverter units in the operation state is in a modulating region; if yes, injecting a suitable reactive power to the power grid; and if no, controlling the inverter to exit an operation mode of independently performing maximum power point tracking control on each photovoltaic panel.

Abstract: A method for screen unlocking, a method for image acquiring, and an electronic terminal are provided. In the method for screen unlocking, a most frequently used debug parameter is counted according to recorded debug parameters used for image selection in the most recent N instances. Auto-adjustment is performed on the debug parameters from the most frequently used debug parameter, and an image current acquired is debugged with the debug parameters adjusted, to obtain debugged images. A target fingerprint image is selected from the debugged images. Whether the target image satisfies an unlocking condition is identified and a screen of the electronic terminal is unlocked when the unlocking condition is satisfied. Accordingly, a method for image acquiring and an electronic terminal are also provided.

Abstract: Systems and methods for determining a breast region in a medical image are provided. The methods may include obtaining a first image relating to the breast region, determining a first region including a first plurality of pixels in the breast region, determining a second region including a second plurality of pixels relating to an edge of the breast region, and determining the breast region by combining the first region and the second region. The second plurality of pixels may include at least a portion of the first plurality of pixels.

Abstract: Methods and systems for image processing are provided. A target image may be acquired, wherein the target image may include a plurality of elements, an element of which may correspond to a pixel or a voxel. The target image may be decomposed into at least one layer, wherein the at least one layer may include a low frequency sub-image and a high frequency sub-image. The at least one layer may be transformed. The transformed layer may be reconstructed into a composite image.