278results about How to "No flicker" patented technology

The invention provides a tiled display control system based on a cloud computing technology, an image display method adopting the system and an application of the system. The system comprises a plurality of displays, a plurality of distributed cloud registration controllers, a plurality of exchangers and system software, wherein a jointing wall is formed by the plurality of displays; an LAN (Local Area Network) is formed by cascading the plurality of exchangers, and a framework core of an IP (Internet Protocol) network is formed by a transmission channel for providing data and control commands; the plurality of distributed cloud registration controllers are accessed into the exchangers of the corresponding levels, and are connected with the corresponding displays through video connecting wires, and the cloud registration controller adopts a PCI-E (PCI Express) base-plate and is provided with an Inter processor. A plurality of data (IE) windows can be displayed on an assembled display simultaneously by adopting the performance of a flexibly configured server and an output channel of the system, and can be interacted in real time; furthermore, the tiled display control system has the functions of video decoding, server memory and the like after the system is applied to a video conference system; compared with the traditional scheme, the system has the advantages of high performance, high reliability, high development, low cost, information processing, strong analysis and management capacities, high resolution ratio, high performance cost ratio, real-time display, green environmental protection and the like.

The invention provides a method for application program starting authentication, which mainly comprises the steps that an event starting notice sent by a preset backstage service is received, wherein the event starting notice is generated based on a starting behavior of an application program intercepted by the backstage service; a response is made to the event starting notice, a locking interface is started to receive password input of a user, and the authentication is carried out to the starting behavior of the application program; and the backstage service is informed by an authentication result to release or prohibit starting of the application program. In addition, the invention also provides a device for the application program starting authentication. The method and the device for the application program starting authentication provided by the invention can realize locking before the self-starting of the application program, and determine whether the starting is realized by the user's authentication, so that the problem about frame blinking during the locking is solved, time wasting caused by timed polling of a CPU is avoided, and a program locking function with better user experience is realized.

The invention discloses a teaching system. The teaching system comprises a teacher terminal suitable to receive teaching contents configured by teachers and send the teaching contents which are configured in one or more modes of uploading voices, pictures, videos and texts, and a student terminal which is in communication connection with the teacher terminal and is suitable to receive homework contents written by students and send the homework contents to the teacher terminal. According to the technical scheme, the teaching efficiency and the teaching effect of the teaching system are improved.

The invention discloses an application program starting control method and device. Starting of an application program locked by safety software is controlled by means of system service used for processing safety service in a system framework layer. The method includes the steps that after the safety service monitors a command to start the application program, the safety software in an application program layer is called; the safety software executes a user authentication and verification process on the basis of a starting event; the system framework layer determines to start or lock the application program according to a user authentication result. Due to the facts that the application program is not started directly and the safety software is called back, the application program can be started only when user authentication is successful, and the application program is locked when authentication fails, so that the problem that the application program flashes due to the fact that the application program is started firstly and then the safety software is used for locking the application program is avoided, and the problem that CUP time is wasted in timed training in rotation is avoided.

The invention provides a light-emitting diode (LED) eye-protecting lamp with multiple illuminators which comprises an LED area light source, a heat dissipating shell, a rotating shaft structure matched with a natural light sensor and a low-voltage direct current drive controller used for adjusting brightness. The LED eye-protecting lamp with multiple illuminators has the advantages that adjustment control function is intelligent, low-voltage input is safe, appearance of the eye-protecting lamp can be designed variously, problems of direct glare of the light source illuminators and indirect glare of the lighting device are solved under the condition that high-light of the eye-protecting lamp is ensured, structure is reasonable and compact, manufacturing is convenient, purposes of energy-efficient, environmental protection, conscious, flicker-free, no radiation, no glare, no shadows and no light pollution are achieved truly, and the LED eye-protecting lamp with multiple illuminators has high social benefits and economic benefits.

The invention discloses an online examination method, device and system. The online examination method includes: acquiring examinee login information of examinees; finding examination paper types corresponding to the examinee login information according to the same; finding target examination paper pointed by the examination paper types from a examination paper set, and sending the target examination paper to examination terminals of the examinees, wherein the examination paper of various examination paper types is stored in the examination paper set, and examination questions in the examination paper of each examination paper type are configured by examiners having corresponding question compiling login information. By the online examination method, device and system, universality and convenience of examination are realized.

The invention discloses a method and a system for generating MIPI (mobile industry processor interface) signals for MIPI module detection. RGB image data are acquired through link video signals and then MIPI signals are acquired through the RGB image data. To be specific, the method comprises steps as follows: before the RGB signals are converted into the MIPI signals, the RGB image data converted from the video signals are cached; a local RGB image pixel clock is acquired according to required image timing sequence parameters displayed by an MIPI module; a stable local image timing sequence is generated under the control of the RGB image pixel clock according to the image timing sequence parameters, and image synchronization signals meeting the MIPI module detection requirement are generated; under the control of the image synchronization signals, MIPI conversion is performed on the cached RGB image data, and the MIPI signals meeting the MIPI module detection requirement are acquired. The system for generating MIPI signals for MIPI module detection can be realized on one FPGA (field programmable gate array) chip and has the characteristics of easiness in implementation, lower cost, convenience in operation, work stability, high reliability and the like.

The invention discloses a beef quality intelligent grading system and method based on machine vision. The system comprises a beef carcass placing platform, a camera obscura with a camera and a beef quality grading module, wherein the camera in the camera obscura is used as a collection device of the beef carcass information for collecting image signals of a beef carcass to be detected on the beef carcass holding platform; the output of the camera is connected with the beef quality grading module; and the output of the beef quality grading module is used as the output beef grading information of the beef quality intelligent grading system based on the machine vision. In the invention, a digital image processing technique is utilized to carry out relevant required processing on the collected cross section image of the beef carcass; three indexes, such as marbling, fat color and red beef color in an effective musculus ocularis area are utilized for analyzing, thus the whole beef carcass can be graded effectively, the shortage of misjudgement of the traditional beef grading system in which a single index is used can be overcome, and the accuracy and the objectivity of grading can be greatly improved.

The invention relates to a driving circuit for an LED (light emitting diode) lamp. The driving circuit comprises an anti-surge overflow and overvoltage circuit, an EMC (electro magnetic compatibility) filter circuit, a rectifier bridge, a harmonic suppression circuit, a boosted circuit, a backward-stage rectifier filter circuit and a constant current circuit, wherein the input end of the anti-surge overflow and overvoltage circuit is externally connected with a commercial power network, and the output end of the constant current circuit is externally connected with the LED lamp. According to the invention, the low voltage power supply in the prior art is changed into a high voltage power supply for the LED lamp; and meanwhile, a switching converter can be omitted, the energy consumption when the switching converter is started and closed can be reduced, the power factor and the energy utilization ratio can be improved, and the purposes of energy conservation and environmental friendliness can be achieved.

The invention discloses an LED drive power supply applicable to an electronic transformer. A first control circuit is used for controlling current which flows through an inductor so as to ensure that the electronic transformer can meet the requirements of the minimum load current under any loads, therefore the electronic transformer can normally work at the whole AC cycle and keep the output voltage of the power stage circuit substantially constant; and a steady-flow control circuit is used for controlling current which flows through an LED load so as to ensure that the LED load can steadily light, and high control precision and high response speed are achieved. The LED drive power supply provided by the invention can be matched with various electronic transformers in a conventional circuit structure and enables all the LED loads to work normally without flickering.

The invention discloses a refreshing method of an electronic ink screen. A monitor is added to a drawing device of the electronic ink screen for monitoring the frame drawing updating frequency of all the electronic ink screen; when the updating frequency is higher than a threshold, the monitor emits a global notification to enable a refreshing manger to refresh the electronic ink screen by use of a refresh mode; and when the updating frequency is lower than a threshold, the monitor emits the global notification to enable the refreshing manager to refresh the electronic ink screen by use of a second refresh mode. Whether two preset refresh modes need to be converted is flexibly determined according to the frame drawing updating frequency of the electronic ink screen in the application process of a user. When a static image is watched for long time, a system determines that replacement of a refreshing mode is unnecessary and an original refreshing mode is always maintained. In case of animations or other images with quite high local refreshing frequencies, the system automatically converts the original refreshing mode into the first refreshing mode, high-frequency refreshing is automatically started, and the influence exerted by a ghost image on reading of the user is reduced.

A cholester-phase reflection-type stereo LCD is composed of levorotary and dextrorotary cholester-phase LCDs, in which at least one pair of LCDs has opposite spiral structurcs. Its advantages includehigh definision, high resistance to moisture environment, low cost and power consumption, and high duty ratio.

An autostereoscopic display apparatus includes a backlight unit, a polarizing plate disposed in front of the backlight unit; a display panel displaying a left eye image and a right eye image by interlacing pixel lines of the left and right eye images alternately and sequentially; a lenticular lens sheet, disposed between the polarizing plate and the display panel, separating light emitted from the backlight unit into a left eye zone and a right eye zone; and a polarization switch controlling a polarization direction of light proceeding towards the left eye viewing zone so that light is incident on pixel lines of the display panel displaying the left eye image and a polarization direction of light proceeding towards the right eye viewing zone so that light is incident on pixel lines of the display panel displaying the right eye image, in synchronization with a vertical scanning time of the display panel.

Disclosed in the invention is a method for filling a cavity in a Kinect depth image in real time. The method comprises the following steps: step 1, obtaining a color image of a shooting scene and a corresponding depth image by using a Kinect camera and determining a foreground image position and a background image position by using an operating-period Gauss average method and a background differencing method; step 2, constructing a deepest image by using a Kinect depth image and filling a cavity in the deepest image; step 3, replacing the pixel of the deepest image with a background pixel of the depth image, thereby realizing cavity filling of the depth image background; and step 4, with the foreground image position obtained by the step 1, marking the cavity existed in the foreground position of the Kinect depth image and filling the marked cavity in real time. According to the invention, the object edge in the depth video with the filled cavity becomes stable; and the no flicker phenomenon occurs in the depth video. Meanwhile, the cavity filling speed in the depth image and the image stability can be improved effectively.

The invention discloses an LED (light-emitting diode) operating lamp adjusting the size and the shape of a lighting facula. The operating lamp is composed of a main lighting light source and an auxiliary lighting light source, wherein the two part light sources are realized through an LED array, the main lighting light source is divided into six regions which are respectively defined as W0,W1,W2,W3,W4 and W5; the auxiliary lighting light source is divided into two regions which are respectively defined as V1 and V2, each region is internally provided with a group of LED monomers, whether each group of LED monomers is lightened is controlled by a singlechip through a relay, and combinations of different regions form different sizes and shapes of irradiation faculae; and the main lighting light source and the auxiliary lighting light source also can realize adjustment of the lighting angle of a light source respectively through an angle adjusting mechanism, and the LED operating lamp realizes the control of switching-on and switching-off of a power switch, the size and shape of the main lighting or auxiliary lighting faculae size and the lighting angle through a key state on the control panel. Users adjust the required lighting effects through a control button according to the real lighting field requirement.

The invention provides an LED lamp bar drive circuit and a dimming method thereof, a backlight module and a display device, belongs to the technical field of display, and can solve the problem that existing PWM dimming can cause flickering or noise easily. The LED lamp bar drive circuit comprises a power supply unit for providing voltage for each branch of LED lamps, a current detection unit for detecting average value of total current input to LED lamp bars, and a control unit for controlling the LED lamps on each branch to be turned on / off according to the detection result of the current detection unit. The brightness of the LED lamp bars can be adjusted by controlling the on / off state of the lamps on the corresponding branch. The dimming method is high in efficiency, low in noise, and wider in dimming range. The LED lamp bar drive circuit is suitable for adjusting the brightness of various types of backlight modules.

The invention discloses an implementation method for enhancing the visual effect of user interfaces of a mobile phone and a device thereof. The method of the invention comprises the following steps: (A) acquiring and saving the current window interface W1; (B) acquiring and saving the next window interface W2 under the condition that the next window is not displayed; (C) generating a transition cartoon by utilizing the saved current window interface W1 and the saved next window interface W2, and playing the transition cartoon between the current window and the next window; and (D) after the transition cartoon is displayed, normally displaying the next window interface W2. The invention can realize the purpose of farther enhancing the visual effect of the mobile phone in the switching process of the user interfaces under the conditions that the hardware cost and the software cost are not increased, the development difficulty is not increased and the development cycle is not prolonged.

The invention discloses a linear nanometer carbon pipe composite field launching source and making method and specific device, which contains a conductive fiber weaving line substrate with single wall or multiple-wall nanometer carbon pipe film deposited on the substrate. The making method comprises the following steps: predisposing the surface of fiber weaving line; utilizing self-power pyrolytic CVD method grow single-wall or multiple-wall nanometer carbon pipe on the fiber weaving fiber. The length of composite field launching source is not limited, which produces linear pattern product. The device is fit for pipe-typed nanometer carbon pipe field launching luminous bulb, which can observe the field emitting condition.

The disclosure, which belongs to the technical field of displaying, relates to a refresh rate adjustment method and apparatus. The method comprises: a current first refresh rate of a screen and a current first brightness value of ambient light are obtained; according to the first refresh rate and the first brightness value, whether the refresh rate of the screen needs to be adjusted is determined; and if so, the refresh rate of the screen is adjusted based on the first brightness value. Therefore, the screen does not need to keep a high refresh rate all the time; and a non-stroboflash effect of the screen under various environmental light luminance can be guaranteed and power consumption of the screen can be reduced. The refresh rate adjustment method and apparatus are used for adjusting a refresh rate of a screen.

The invention is suitable for the field of driving of a LED and provides a pulse modulation control method and a pulse modulation control device for driving the LED. In the invention, according to received address information, gray level data of an LED lamp bank corresponding to the address information is acquired; then a pulse modulation signal or a plurality of pulse modulation signals with the same or special duty ratio are generated in a pulse modulation period according to preset parameters by combining the gray level data; and one pulse modulation signal is stored in a first preset storage space or a plurality of pulse modulation signals with the same or special duty ratio are stored in the first preset storage space to form a plurality of continuous pulse modulation signals with periodicity, so that the brightness of the LED in the working process is ensured to be changed smoothly without the phenomenon of blink or nonuniform brightness, and thus, the problems of blink and nonuniform brightness when the LED light-emitting device works, which are caused by a pulse modulation mode provided in the prior art, are solved.

The invention relates to the field of tunnel engineering, in particular to a method for laying a tunnel portal strengthened illuminating system. The method is characterized in that a plurality of illuminating devices are arranged in an entrance section and an exit section, and the illuminating devices arranged in the entrance section or the exit section are distributed in a thinning mode from a tunnel portal to a distribution area in a tunnel, namely the illumination level is reduced gradually from the tunnel portal to the inside of the tunnel. The method for laying the tunnel portal strengthened illuminating system has the advantages that the laying scheme is acquired by setting up a testing shed in the site to analyze, compare and select data of a plurality of schemes, and light guides are arranged in the entrance section and the exist section of the tunnel by the laying scheme to replace high strength gas-discharge light sources, so that the gentle transition of the illumination levels on road surfaces inside and outside the tunnel is realized, and the zero electric energy loss of tunnel strengthened illumination is realized.

The invention relates to the technical field of environmental protection, in particular to an efficient and low power consumption ballast water treatment device. The device contains a sea chest (101), a ballast pump (102), a salinity sensor or conductivity sensor (103), a filter (104), an equipment under test (EUT) (105), a control unit (106), an EUT power supply (107), a water outlet (108), a ballast tank (109), a filter sewage outlet (110), a valve (111), a tubular reverse osmosis (TRO) device (112), a flow detection unit (113) and a pipe, wherein the inside of the filter (104) is provided with a sterilization system; the sterilization system contains a sterilization system consisting of a solid light-emitting diode (LED) ultraviolet lamp and / or a sterilization system combining a solid LED ultraviolet lamp with photocatalysis; and the solid LED ultraviolet lamp is a hollow triangular prism or quadrangular prism type ultraviolet lamp. The device of the invention has the advantages of low power consumption, high efficiency, convenient installation and no pollution.

The invention discloses a wide and narrow viewing angle switching display device. The device comprises a display panel and a backlight module located on the back surface of the display panel; the backlight module comprises a back plate, a plurality of lamp strips located on the back plate, a diffusion plate located below the display panel and a glue frame around the display panel, the lamp stripsare evenly distributed on the bottom surface of the back plate, and LED lamps in each lamp strip are arranged with a preset angle; in a first display mode, all the LED lamps in each lamp strip are turned on, so that light emitted from all the light strips is diverged in different directions; in a second display mode, partial LED lamps in each lamp strip are turned on, so that light emitted from all the light strips is gathered in the center of the display panel, and current flowing through each lamp strip can be set to make the light-emitting brightness of all the lamp strips equal in the first display mode and the second display mode. The display modes are switched by controlling the quantity of the turned-on and turned-off LED lamps, the display brightness is controlled by controlling the magnitude of the current flowing through the LED lamps, and the good film watching effect is kept.

The invention discloses a high-resolution auto-stereoscopic display which is composed of a switching grating and a flat-panel display screen. The flat-panel display screen can be an LCD, a PDP, an LED or other equipment with a point-to-point image display function. The flat-panel display screen has high refresh frequency and can refresh an image at a frequency which is N times the base frequency under the control of a frequency-doubling player. A synchronizer controls the switching grating to carry out state switching which is synchronous with refreshing of the flat-panel display screen. Each frame of high-resolution stereoscopic synthetic image output by the frequency-doubling player is decomposed into N full-resolution sub images which are sequentially refreshed and displayed in a point-to-point manner in a basic refresh period, and the N sub images can be combined into an image with N-time definition under the action of the switching grating. The high-resolution auto-stereoscopic display has the outstanding advantage that large-viewing-angle and high-definition naked-eye stereoscopic display can be realized.

The invention provides an exposure control method, system and device for inhibiting a moving bright light source, and the method comprises the steps: obtaining the brightness of a target region in a display unit as the current brightness; judging whether the current brightness is within a preset brightness threshold interval or not; if the current brightness is greater than the upper limit value of the preset brightness threshold interval, recording the target area as overexposure, and suppressing exposure of the target area to reduce the current brightness to the target brightness; and if thecurrent brightness is smaller than the lower limit value of the preset brightness threshold interval, marking the target area as under exposure, and unlocking exposure of the target area to enable the current brightness to rise back to the target brightness. The method does not depend on the detection of the target main body, can quickly suppress exposure, and captures and identifies the target main body in a limited time. And when the target object moves and follows, the display image can be kept from flickering, and the stability of the display image is kept.

The invention discloses a portable operation shadowless lamp with a camera shooting function. The portable operation shadowless lamp is characterized in that the portable operation shadowless lamp is provided with a base capable of being dragged and moved, the base is provided with an accommodating box capable of being opened or closed and supporting rods detachably connected, and LED illumination devices and camera shooting devices are arranged at the ends of the supporting rods in a detachable mode; when the portable operation shadowless lamp is not used, the supporting rods, the LED illumination devices and the camera shooting devices are detached and placed into the accommodating box and can be conveniently dragged and moved; when the portable operation shadowless lamp is in use, the supporting rods, the LED illumination devices and the camera shooting devices are sequentially connected and assembled to form a floor shadowless lamp. The portable operation shadowless lamp has the advantages of being convenient to carry and flexible to use. Furthermore, because the portable operation shadowless lamp is provided with the illumination devices and the camera shooting devices, the portable operation shadowless lamp has the operation illumination function and can also conveniently achieve medical camera shooting. According to the portable operation shadowless lamp, the brightness and light spots of the illumination devices can be intelligently adjusted so as to meet different illumination requirements.

The invention discloses digital video signal switching circuit and method. The circuit comprises an external reference signal processing module, a synchronous processing and switching module, an SDI deserializing signal module A, an SDI deserializing signal module B, an INPUT1 memory, an INPUT2 memory, an MCU controller and an SDI signal serializing, converting and driving module which are integrated on the same circuit board. The method comprises the following steps of: synchronizing a digital video signal, and purely switching the digital video signal. In the invention, the synchronous processing and switching module is used for reading data in the memories according to a clock signal CLK of an external reference signal, the synchronization type required by a product and a row / field signal extracted by the external reference signal processing module by using an H / V / F signal as a reference, thus read signals are completely synchronized; and then the synchronous processing and switching module switches the signals according to a command sent by the controller MCU, thereby the signal switching is guaranteed to be complete and is free from dithering and flashing.