18results about How to "Avoid flickering" patented technology

This invention relates to the field of mobile device camera testing technology, and discloses an Android dynamic adaptive screen camera testing system, including a light sensing module, an algorithm module, a parametric template system, a distortion compensation engine, and a differential rendering module. The light sensing module collects ambient absolute illuminance data; the algorithm module calculates the ambient illuminance gradient and controls the system state flow; the parametric template system reconstructs basic texture parameters based on the gradient to generate a two-dimensional texture of the test pattern; the distortion compensation engine constructs a non-uniform three-dimensional geometric mesh model based on the screen curvature radius and performs spatial distortion calculations on the vertices of the two-dimensional texture; the differential rendering module obtains a feature mask image, performs shading resource reallocation calculations, and sends a timing synchronization trigger command to the camera under test after rendering is completed. This invention can reduce the impact of sudden changes in external ambient light on the pattern display quality and compensate for the geometric deformation at the edges of curved screens.

The present application belongs to the technical field of complex illumination scene adaptive control, and particularly relates to a night vision strong light suppression imaging method for highway scenes. The method completes scene preliminary judgment through illumination statistical feature extraction, identifies strong light regions and extracts connected domain features, assigns differentiated suppression intensity factors based on light source types, automatically switches imaging modes, combines local exposure suppression, halo weakening, night vision enhancement, and infrared light supplementing with exposure closed-loop control, and realizes precise suppression of strong light glare, dark detail improvement, and dynamic stability of image brightness. The present application solves the problems of insufficient low-illumination imaging, difficulty in suppressing strong light, and unstable fixed parameters in the prior art, and is suitable for complex illumination scenes at night on highways, ensuring clear key information such as vehicle outlines and license plates, and meeting the needs of night safety monitoring and vehicle detection.

Disclosed is a display device including a light emitting element; and a pixel driving circuit connected to the light emitting element and configured to include a first node, a second node, a third node, and a fourth node, wherein the pixel driving circuit includes a driving transistor connected to the first node, the second node, and the third node, a plurality of switching transistors, a storage capacitor, and a plurality of signal lines and a plurality of voltage lines, wherein an initialization voltage applied through an initialization line among the plurality of signal lines and the plurality of voltage lines varies based on a data voltage.

The utility model provides a special vehicle display screen anti-screen flash protection circuit and a power management system, the special vehicle display screen anti-screen flash protection circuit comprises a microcontroller module and an enabling protection module, and the enabling protection module is composed of a signal control switch tube and an isolation diode. The anode of the isolating diode is connected with the display screen enable signal output end of the microcontroller, and the cathode is connected with the control end of the switching tube; the first end of the switch tube is connected with a vehicle-mounted display screen driving signal output end, and the second end is grounded. When a special vehicle is ignited and started, the circuit forcibly pulls down a display screen driving signal to a low level through the switching tube, so that the display screen enters a transient closing state, and power supply is recovered after a power supply system is stable, thereby avoiding the impact of voltage transient on a display module, preventing the vehicle-mounted display screen from flickering, and prolonging the service life of the display screen. And the running stability and durability of the display screen of the special vehicle are further improved.

The invention discloses a control method and device for a color temperature breathing light supplement lamp, and belongs to the technical field of illumination control. The method comprises the steps that a color temperature control curve is generated according to a preset periodic function, the color temperature control curve represents the change relation of the color temperature proportion along with time, and the color temperature proportion is the proportion of the cold light quantity in the total light quantity; periodically updating a color temperature proportion value corresponding to the current moment according to the color temperature control curve; respectively calculating driving parameters of the cold light emitting unit and the warm light emitting unit according to the color temperature proportion value; and controlling the output of the cold light emitting unit and the warm light emitting unit according to the driving parameters, so that the output color temperature of the light supplementing lamp is periodically and cyclically changed within a preset color temperature range. Breathing control and color temperature control are combined, alternate, continuous and cyclic change of color temperature is achieved, and the playing method of the light supplementing lamp is enriched.

This application provides a driving circuit for driving a load. The input terminal of the input adjustment circuit receives the input voltage, and the output terminal of the input adjustment circuit is grounded. The input terminal of the high power factor module and the first input terminal of the anti-flicker module are connected to the input terminal of the input adjustment circuit. The first terminal of the load is connected to the output terminal of the high power factor module, the second terminal of the load is connected to the second input terminal of the anti-flicker module, and the output terminal of the anti-flicker module is connected to the output terminal of the input adjustment circuit. This application can automatically switch its operating state according to the dimming angle. When the dimming angle is greater than a first predetermined value or when dimming is not performed, the high power factor module adjusts the input current of the input adjustment circuit into a multi-segment current to reduce total harmonic distortion and improve power factor and efficiency. When the dimming angle is less than or equal to the first predetermined value, the anti-flicker module adjusts the output current of the anti-flicker module to prevent the LED beads from flickering.

The application provides a dimming method, a dimming control device and a light source system, comprising: when the light source system is enabled and the dimming control device is powered on for the first time, setting a conduction angle to a maximum value and gradually reducing the maximum value; detecting brightness information of the light source; obtaining a flicker frequency of the light source according to the brightness information of the light source and comparing the flicker frequency with a preset reference flicker frequency; when the flicker frequency is less than or equal to the reference flicker frequency for the first time, setting the conduction angle at this time to a lower limit of the conduction angle. The dimming method, the dimming control device and the light source system can adaptively set the lower limit of the conduction angle according to the reference flicker frequency, adaptively limit the lower limit of the dimming brightness, avoid low-frequency flicker of the light source at a low dimming brightness, evade flicker of the light source at a low brightness while ensuring the dimming range of the light source system, and improve the practicability of the light source system.

The embodiment of the invention discloses a scene reconstruction method and device, equipment and a storage medium, and the method comprises the steps: carrying out the scene reconstruction through a preset scene reconstruction mode if a current moment is a first three-dimensional scene relative to a target scene, and obtaining a current three-dimensional scene; otherwise, acquiring a plurality of first image frames and second image frames formed by acquiring the target scene at different visual angles, and acquiring a previous three-dimensional scene reconstructed based on the target scene; according to the first image frames and the second image frames, performing pose adjustment on Gaussian points in the previous three-dimensional scene to obtain a deformed three-dimensional scene; performing Gaussian point addition and deletion and Gaussian point feature optimization processing on the deformed three-dimensional scene according to each second image frame to obtain a processed optimized three-dimensional scene; and determining the optimized three-dimensional scene as a current three-dimensional scene at the current moment. According to the method, the current three-dimensional scene with higher relevance with the previous three-dimensional scene can be obtained in the time domain, so that the smoothness and continuity from the previous three-dimensional scene to the current three-dimensional scene in the time domain are ensured.

The utility model relates to the technical field of electronic equipment interfaces, and discloses a DVI-24 + 1 pin connector with a hot plug function. Comprising a connector body, fixing screws are connected to the inner walls of the two sides of the connector body in a penetrating and threaded mode, an electrical interface end is fixedly connected to the end of the connector body, an auxiliary protection mechanism is arranged outside the electrical interface end, and the auxiliary protection mechanism is used for protecting the electrical interface end in a non-plugging state. The auxiliary protection mechanism comprises a protection cover arranged outside the electrical interface end in a sleeving mode, the opening end of the side, close to the fixing screws, of the protection cover is fixedly connected with a fixing frame, the side wall of the end, located at the electrical interface end, of the connector body is fixedly connected with a supporting plate, and the top of the supporting plate is symmetrically and fixedly connected with two supporting feet. According to the utility model, the protective cover is utilized to play a dustproof and waterproof role in the idle period of the electrical interface end, and meanwhile, when the electrical interface end accidentally falls to the ground, the protective cover can play a buffering role.

The invention discloses a self-adaptive clustering method for unmanned aerial vehicle-mounted 4D radar point clouds, and belongs to the field of radar signal processing. The method comprises the steps of obtaining an original point cloud of an unmanned aerial vehicle 4D radar, and performing motion compensation and dynamic ROI filtering preprocessing; dBSCAN parameter self-adaption is driven through a radar physical model, the neighborhood radius and the minimum core point number are dynamically adjusted, and coarse clustering is carried out on point clouds; setting a clustering quality evaluation standard, calculating a spatial covariance matrix, a point cloud number and geometric distribution characteristics of a coarse clustering cluster, and screening out a to-be-refined cluster with an under-segmentation risk; after a to-be-refined cluster is screened, a heterogeneous graph model fusing space, speed and intensity features is constructed, and an RCS condition gating strategy is adopted; and carrying out recursive cutting by utilizing spectral clustering. According to the method, the problems of over-segmentation and under-segmentation caused by sparse point clouds along with distances and target RCS flicker are effectively solved, and the target sensing precision and robustness of the unmanned aerial vehicle in a complex scene are improved.

The invention relates to the field of vehicle image processing, and particularly discloses an automatic driving obstacle detection method and system based on image recognition, and the method comprises the steps: detecting and segmenting a local degradation region in an original image, and generating a precise mask; restoring the region based on the inverse process of a physical degradation model, and fusing to generate a global restoration image; evaluating the credibility of the repair area, generating a repair credibility map to modulate the depth features, and obtaining an anti-repair artifact attention feature map; detecting the feature maps of the current frame and the historical frame through a time sequence collaborative attention mechanism, and outputting a stable obstacle list; the system comprises four modules with corresponding functions. According to the method, a repair credibility evaluation and feature purification mechanism is introduced, and time sequence consistency verification is combined, so that the deep problem that local repair artifacts interfere with detection is systematically solved, and the accuracy and robustness of obstacle detection under severe conditions of rain, snow, mud and the like are remarkably improved.

The present disclosure provides a video processing method, device, medium and electronic equipment, relating to the field of video processing, the method comprising: performing matting processing on a first target video by a video matting model to obtain a first foreground video and a first background video; the video matting model being trained according to at least a second target video output by a video synthesis model, the video synthesis model performing feature extraction on target video frames of the same moment in a second foreground video and a second background video to obtain first video frame features, and obtaining second video frame features corresponding to historical video frames of the same moment in the second foreground video and the second background video; and synthesizing the second foreground video and the second background video according to the first video frame features and the second video frame features to obtain the second target video. The video synthesis result of the present disclosure is more realistic, and thus the video matting model is trained based on the video synthesis result, so that the accuracy and efficiency of the video matting model are higher.

The invention relates to a gate driver and an electronic device having the same. The gate driver includes: an input circuit for transmitting an input signal to a first control node in response to a first clock signal; a pull-up circuit for pulling up the gate output signal to a high voltage in response to a signal of a second control node; a pull-down circuit for pulling down the gate output signal to a first low voltage in response to a signal of a third control node; a node separation circuit including a control electrode for receiving a high voltage, a first electrode connected to a first control node, and a second electrode connected to a second control node; a first control node control circuit for controlling a signal of the first control node in response to a signal of a third control node; and a third control node control circuit for controlling a signal of a third control node in response to a signal of the first control node.

The invention discloses a liquid crystal display panel and a display device, which are characterized in that a second electrode of a thin film transistor further comprises a first part, and the first part is at least partially overlapped with the orthographic projection of a grid line on a first substrate, so that parasitic capacitance formed between a grid electrode and the second electrode is equivalently compensated; under the condition of counterpoint fluctuation in the technological process, for example, a film layer where a grid electrode is located is equivalent to the overall left part under the ideal counterpoint condition, so that the overlapping capacitance between a third part of a left thin film transistor electrically connected with the same data line and the grid electrode is increased, and the overlapping capacitance between a first part and the grid electrode is decreased; the overlapping capacitance between the third part of the right thin film transistor electrically connected with the data line and the grid electrode is reduced, and the overlapping capacitance between the first part and the grid electrode is increased; the added first part can ensure that the Cgs of each sub-pixel on the left side and the right side of the same data line are roughly the same, the uniformity of Flickers is improved, and the problem of flicker of a display surface is avoided.

The invention relates to the technical field of medical equipment control, in particular to a power supply circuit of a cold-state light source and electronic equipment. The input end of an output management module is connected with a power supply module, and the output end of the output management module is connected with an output interface for accessing an external load; the input end of the voltage reference module is connected with the power supply module. The first output end of the voltage reference module is connected with the reference input end of the current-limiting protection module. The sampling input end of the current-limiting protection module is connected with the output end of the output management module, and the output end of the current-limiting protection module is connected with the feedback end of the output management module; the second output end of the voltage reference module is connected with the reference input end of the boost control module; the sampling input end of the boost control module is connected with the output end of the output management module, and the output end of the boost control module is connected with the feedback end of the output management module. Intelligent management of the cold-state light source is realized, and the starting success rate, the operation stability and the safety of the light source system of the medical equipment are improved.

This invention discloses a multi-dimensional perceptual gaze-point rendering method, system, and medium. The multi-dimensional perceptual gaze-point rendering method is characterized by the following steps: S1, acquiring the user's eye-tracking data in real-time within a virtual reality environment; S2, dividing the rendering sequence into saccade windows, recovery windows, and stable gaze windows; S3, constructing a multi-dimensional visual perception model that integrates saccade sequence features; S4, acquiring the perception critical frequency and mapping it to a resolution scaling factor to guide rasterization operations in the graphics pipeline; S5, invoking the resolution scaling factor and performing dynamic resolution rendering in the graphics rendering pipeline based on the resolution scaling factor. The system includes a data acquisition module, an event detection module, a model calculation module, a rendering scheduling module, and a graphics drawing module. This invention is rationally designed, effectively utilizing computing resources, improving the rendering system's frame rate, and enhancing the user experience.

This invention discloses an adjustable constant current output circuit, solving the problems of low accuracy, poor stability, and insufficient adaptability of existing circuits. The circuit includes a signal processing unit, a constant current control unit, and a noise suppression unit: the signal processing unit generates a reference voltage through a first operational amplifier, resistors, and capacitors; the constant current control unit uses a second operational amplifier and a PNP transistor to output the current; the noise suppression unit filters out ground loop noise through a capacitor. This circuit achieves precise milliampere-level current adjustment through a DAC1 signal and a resistor network, with an error ≤ ±0.5mA; the capacitor and feedback loop suppress power supply ripple, with current fluctuation <1% under 100mV ripple; it is specifically optimized for low current, offering flexible adjustment and low power consumption, making it suitable for scenarios such as precision sensor power supply, LED lighting driver, and chip testing equipment, improving equipment accuracy, stability, and battery life.

The application provides a display panel, which comprises an array substrate, a counter substrate and a liquid crystal layer arranged between the array substrate and the counter substrate. A display area of the array substrate comprises a plurality of pixel units for performing image display, each of the pixel units comprises a liquid crystal capacitor and a storage capacitor, the liquid crystal capacitor is connected with a first common electrode line, and the storage capacitor is connected with a second common electrode line. A switch unit is connected with the first common electrode line and the second common electrode line, and is used for electrically connecting the first common electrode line and the second common electrode line when power is turned off, so that the liquid crystal capacitor and the storage capacitor have the same voltage and discharging speed, thereby avoiding screen flickering and image sticking, and effectively improving display effect. The application further provides a display device comprising the display panel.