275results about How to "Eliminate flickering" patented technology

Methods and apparatuses to enable the development, deployment and update of composite applications on mobile devices. In one embodiment, a method processor in a mobile device may include a workflow engine and a cache manager which looks ahead of the current execution of a workflow to preload modules. The method processor may present modal user interfaces in a non-modal way to eliminate flicker, and use a logger to stamp the workflow related data with real time measurements, such as time, location, and vehicle bus information. The logger may capture screen images and global data of the workflow during the execution. The log data stream may be collected and sent from the mobile device in real time, or in a batch mode, for monitoring, debugging, diagnosing or tuning the execution of a workflow, for providing hot update, help and guidance against deviation during the execution, and for other features.

A ballast circuit for a high intensity discharge lamp includes a boost converter, responsive to a dc input voltage, for providing a boosted dc output voltage; a boost controller, responsive to the boosted dc output voltage, for driving the boost converter to maintain the boosted output voltage at a predetermined level; a buck converter, responsive to the boosted dc output voltage, for providing a reduced dc output voltage; and a buck controller, responsive to the reduced output voltage, for driving the buck converter to operate the discharge lamp in a transition mode and maintaining the reduced dc output voltage at a preselected level for operating the discharge lamp in a steady state mode.

An LCD includes a first gate line and a second gate line disposed parallel to each other and perpendicular to a first data line and a second data line, thereby defining a unit pixel region, a first common line disposed parallel to the gate lines, a second common line extending from the first common line, a pixel bar and pixel electrodes disposed in the unit pixel region and electrically connected to a first TFT, a second TFT electrically connected to the second common line, a common bar and common electrodes electrically connected to the second TFT, the common electrodes being disposed alternately with the pixel electrodes.

A display device includes a light source, a substrate transparent to a light source light, a pixel portion disposed at a side irradiated with the light source light, and a light extraction structure for extracting the light from the pixel portion to the outside. The light extraction structure includes a wall-like structure and a reflection layer. The pixel portion includes a laminated film formed by laminating the wavelength conversion layer for emitting fluorescent light through radiation of the light source light, and an excitation light absorbing layer disposed between the wavelength conversion layer and the substrate. The laminated film is disposed in the region partitioned by walls of the wall-like structure.

An inductorless LED driver powers a string of low current LEDs. A phase controlled triac dimmer, serially connected to a full-wave rectifier circuit, performs as an LED current and triac holding current control element. The output of the full-wave rectifier circuit is divided into two circuit paths; the first path provides power to drive a string of serially-connected low-current LEDs, and the second path connects to a dynamic load, which supplies a holding current that flows through the triac dimmer. There are two feedback control systems; the first regulates the luminance of the LEDs; the second regulates the triac holding current to eliminate lamp flicker.

This invention concerns a stereoscopic viewing device and a stereoscopic viewing method, and makes it possible to provide a satisfactory stereoscopic image without increasing of the quantity of recorded information and the quantity of transmitted information. According to the invention, the input television signal is classified respectively on the basis of the level distribution pattern for every pixel in the spatio-temporal region whose center is lying on each attentional pixel, and the input television signal is blocked for every pixel in the spatio-temporal region whose center is lying on each attentional pixel respectively so as to generate the pixel data for predictive calculation, and the predictive calculation of the predictive calculating pixel data is processed utilizing the predictive coefficient which is corresponding to the result of classification obtained from the classifying means out of the predictive coefficients of each set which have been previously prepared, so as to generate the video signal for left eye and the image signal for right eye respectively, and then the stereoscopic image is displayed on the basis of the video signal for left eye and the video signal for right eye; in this way a stereoscopic image can be projected on the displaying means such that a flicker is eliminated and a deterioration of the image quality is prevented.

A flicker detection device includes an accumulation section that divides a screen into a plurality of areas to perform accumulation of pixel levels, writing and reading of the accumulation result to and from a memory area allocated to every area, thereby accumulating the pixel levels in the area for every area, an accumulation result memory that stores the accumulation results of the accumulation section, an area discrimination section that discriminates whether or not every area is a still image area using the accumulation result obtained by the accumulation section and the accumulation result stored in the accumulation result memory, and a flicker level calculation section that averages the accumulation results of the areas discriminated as the still image area by the area discrimination section, and performs an operation using the averaged accumulation result and the accumulation result obtained by the accumulation section, thereby calculating a flicker level.

The invention discloses a refresh rate switching display method and device, computer equipment and a medium. One specific embodiment of the method comprises the following steps: acquiring gray-scale reference voltage of each gray scale; calculating gray scale voltage variation of each gray scale corresponding to different refresh rates; compensating the gray-scale reference voltage of the corresponding gray scale according to the gray-scale voltage variation of each gray scale corresponding to different refresh rates to obtain gray-scale compensation voltage of each gray scale corresponding todifferent refresh rates; and when the refresh rates in the same gray scale are switched, performing display driving by utilizing the gray scale compensation voltage of the current refresh rate corresponding to the gray scale. According to the embodiment, the display drive can be accurately and efficiently controlled, the image flicker phenomenon occurring when the refresh rate in the same gray scale is switched can be effectively eliminated, and then the display effect and the user experience can be improved.

The invention provides a luminance compensation method and a luminance compensation system. The luminance compensation method comprises the following steps: acquiring the current refresh frequency ofa display panel; acquiring a target luminance value corresponding to the current refresh frequency according to the corresponding relationship between the refresh frequency and the luminance value; acquiring a target current value corresponding to the target luminance value according to the corresponding relationship between the luminance value and the backlight drive current value; and generatinga drive current signal of a backlight unit of the display panel according to the target current value, and driving the backlight unit to emit light according to the drive current signal. The luminance compensation method and the luminance compensation system provided by the invention have the advantages that when the refresh frequency is changed, the current refresh frequency is acquired in time,and the backlight drive current is correspondingly adjusted to eliminate the phenomena such as luminance jump and screen flashing when the refresh frequency of the display panel is adjusted, therebyensuring the watching experience.

A visible light wireless communication receiver includes: a source code recognizing unit that receives a source bit stream and recognizes the source bit stream as source codes of a unit of a first number of bits; and a line coding unit that encodes each of the source codes into an encoding code of a unit of a second number of bits, the second number being larger than the first number. In particular, in the encoding code, the number of bits corresponding to 1 is the same as the number of bits corresponding to 0. Therefore, the change in brightness of lighting may be minimized in the visible light wireless communication.

A method for removing flicker in a sequence of images, wherein each image in the sequence of images includes a plurality of pixels. The method includes providing a sequence of images including a source image and a target image, defining a plurality of regions of interest in the source image and a plurality of spatially counterpart regions of interest in the target image, measuring an image quality for all of the pixels in each of the regions of interest in the source image, measuring an image quality for all of the pixels in each of the spatially counterpart regions of interest in the target image, and generating a corrected source image on a region of interest basis depending on the image quality for the pixels in each of the plurality of regions of interest in the source image and the spatially counterpart regions of interest in the target image.

An image-processing apparatus includes an integration section to integrate an image signal in more than one unit of horizontal synchronization period; an interpolation section to carry out an interpolation on the basis of integration values output by the integration section in order to generate integration values corresponding to a predetermined number of sampling positions set in advance during at least one period of flickers appearing on a screen under a fluorescent lamp; a normalization section to normalize an integration value output by the interpolation section or to normalize a difference value between integration values output by the interpolation section as integration values for adjacent fields or frames, respectively; a frequency analysis section to extract a spectrum of normalized integration value or difference values output by the normalization section; and a flicker inference section to infer a flicker component from the spectrum extracted by the frequency analysis section.

An image system comprises at least one image sensor, a light source and a processing unit. At least two images are obtained in sequence in each brightness variation zone of an environment light source. The light source is lighted once in each brightness variation zone, the light of the light source is lightened synchronous with one of the images obtained by the at least one image sensor. The difference between the image synchronous with the light of the light source and the image not synchronous with the light of the light source is calculated by the processing unit so that disturbance of the environment light source is eliminated. The invention further comprises an interference elimination method of the image system.

There is provided a light emitting device having a small area for mounting. The light emitting device of the invention includes a light emitting element having an electric signal terminal, that is driven to emit light by an electric signal given to the electric signal terminal from outside, and a semiconductor chip for driving the light emitting element, having a light emitting element drive circuit that is made of a semiconductor, outputs and applies the electric signal to the electric signal terminal. The light emitting elements are mounted on the surface of the semiconductor chip for driving the light emitting element, and a conductive path is provided for mutually connecting a plurality of light emitting elements on the surface of the semiconductor chip for driving the light emitting element.

The present invention discloses a method and an apparatus for applying a dynamic contrast expansion technique to plasma display panels through performing a gamma conversion for the inputted image to convert the relationship of the brightness and gray level of the inputted image into a linear relation, performing a subtraction for the gray level value of the image to maintain the image at its smallest color deviation, analyzing the image property histogram to compute the maximum gray level and the minimum gray level required for carrying out the image contrast expansion and obtaining an image contrast expansion gain, and adopting an average of several previously inputted image contrast expansion gains and a current image contrast expansion gain as the contrast expansion gain used in the actual contrast expansion gain formula, so as to compute a new outputted gray level value after the image contrast expansion is performed.

The invention discloses a liquid crystal display device, which comprises a liquid crystal panel circuit, a gate driving circuit, a source driving circuit, a time sequence control circuit, a backlight and a backlight control circuit, wherein the time sequence control circuit is used for outputting a gate driving signal and a source driving signal to the gate driving circuit and the source driving circuit correspondingly and outputting a backlight control signal to the backlight control circuit; the gate driving signal comprises a field synchronizing signal; the backlight control signal comprises a field synchronizing signal; the backlight control circuit is used for generating pulse-width modulation (PWM) signals and outputting the PWM signals to the backlight; and phase differences between the PWM signals and the field synchronizing signal are fixed. The invention also provides a liquid crystal display control method. The method is characterized by comprising the field synchronizing signal for controlling the output of the time sequence control circuit and the PWM signals for controlling the output of the backlight control circuit, so that the phase differences between the field synchronizing signal output by the time sequence control circuit and the PWM signals are fixed. By the liquid crystal display device and the liquid crystal display control method, the shortcoming that the image in the liquid crystal display device glitters is effectively overcome, and the quality of a liquid crystal display product is improved.

The invention discloses a liquid crystal display, a display panel and a VCOM voltage control method and device. The method comprises the following steps: acquiring a refresh frequency of the display panel; calling a preset VCOM voltage database to acquire VCOM voltage data corresponding to the refresh frequency according to the refresh frequency; generating a VCOM voltage regulation signal used for regulating a fixed output VCOM voltage signal of the display panel according to the VCOM voltage data; and performing synthetic processing on the VCOM voltage regulation signal and the fixed output VCOM voltage signal of the display panel so as to generate a VCOM voltage synthesis signal, and outputting the VCOM voltage synthesis signal to a VCOM voltage signal input end of the display panel. Therefore, the brightness and flicker indicator of the display panel under different refresh frequencies can be the same, namely a splash screen phenomenon of the display panel can be eliminated, and the using experience of the user is further improved.

An imaging device of the present invention comprises an image sensor having a plurality of pixels made up of a first pixel group and a second pixel group, a flicker detection section for detecting bright states and dark states of all taken images based on a periodic flicker action of a light source contained in a subject from image output from the second pixel group, and a flicker correction calculation section 4 for, when light of brightness having bright states and dark states due to periodic flicker is incident, correcting brightness output gain corresponding to all pixels of the plurality of pixels corresponding to the first pixel group so that brightness output of taking images from the first pixel group becomes a standard brightness output.

The invention discloses a video image haze-removing processing method, which can meet a real-time haze-removing function, and meanwhile, can effectively eliminate flicker of video images obtained after haze removing. The method comprises the following specific steps: calculating atmosphere optical value of each frame image through a dark channel and a self-adaptive adjustment method; calculating initial transmissivity of a first frame image through a dark channel apriori algorithm; constructing an inter-frame transmissivity estimation and neighborhood space energy function, and calculating optimal transmissivity value of each region block; refining the initial transmissivity through a quick guide filtering algorithm; and obtaining the video images after haze removing through a haze-removing model.

The invention discloses a control circuit for eliminating glittering and shutdown ghosting phenomena of a thin film field effect transistor. The problems of glittering and shutdown ghosting in the working process of a conventional TFT-LCD (thin film transistor-liquid crystal display) panel are mainly solved. The control circuit comprises a comparing module, an input control module and an output control module; the comparing module generates four output signals through the input control module; a first output signal is connected to an LCD data driving module; a second output signal and a thirdoutput signal are connected to the output control module; and a fourth output signal is connected to an LCD door driving module through the output control module. The descending slope of an output voltage can be adjusted by controlling the strength of the discharging current of a capacitor in the output control module; the common-mode error in the working process of a TFT-LCD is compensated; the glittering phenomenon is eliminated; electric charges in the TFT-LCD are released by controlling the shutoff sequence of the LCD data driving module and the LCD door driving module; and the shutdown ghosting is eliminated. By using the control circuit, the image display quality of the TFT-LCD is effectively improved, and the control circuit can be used for TFT-LCD display equipment.

The embodiment od of the invention provides a common electrode driving unit, a liquid crystal display panel and a liquid crystal display device, and the common electrode driving unit is used for providing driving voltage for a common electrode in the liquid crystal display panel. The liquid crystal display panel comprises a pixel electrode and a grid driving unit. The invention is characterized in that: the common electrode driving unit comprises an output unit which is connected between the grid driving unit and the common electrode; the output unit is used for correspondingly outputting a third driving voltage and a fourth driving voltage when the grid driving unit outputs a first driving voltage and a second riving voltage, wherein the second driving voltage is larger than the first driving voltage, and the third driving voltage is larger than the fourth driving voltage; and a first voltage difference and a second voltage difference mutually counteract, wherein the first voltage difference is voltage drop generated when the first driving voltage and the second driving voltage mutually convert on the pixel electrode, and the second voltage difference is the voltage drop generated when the third driving voltage and the fourth driving voltage mutually convert on the pixel electrode. By the invention, a flare phenomenon of a liquid crystal display is eliminated.

The invention provides a novel self-adaptive optical method and a system of a wavefront-free sensor. The method comprises the following steps of: establishing a initial wavefront; constructing a coupling efficiency evaluation function; acquiring a tilt compensation signal; and reconstructing wavefront matrix information; determining the optimal position of a guide endoscope; and adjusting a reconstructed wavefront matrix and the tilt compensation signal by a control loop. The system mainly comprises an optical receiving aperture lens (1), a light beam collimation lens (2), a first converging lens (3), a spatial light modulator, a collimation lens (4), the guide endoscope, a second converging lens (5) and a photodetector (6) which are sequentially connected by an optical path signal. The system is applied to high-speed spatial optical communication or optical imaging. The invention improves the reliability of a communication system, accords with the characteristics of the free spatial optimal communication system, has strong practicability and is convenient to popularize and apply.

The invention belongs to the technical field of televisions and particularly relates to a video playing method, device and television. The method comprises the steps that a video receiver obtains a current video playing state; when the obtained video playing state is a live state and a state switching indication is received, the live state is switched to a video-on-demand state; after the live state is switched to the video-on-demand state, video-on-demand data cached in a new video cache zone in advance are called to be played. According to the video playing method, device and television, the problems that a user needs to carry out multiple complex steps of manual operation when live video and video-on-demand video are switched, and video switching smooth degree is low are solved, so that smooth switching of the live video and the video-on-demand video on the intelligent television is achieved, and the shortcomings of a black screen, flickering, sticking and the like in a hardware switching process are overcome.

A liquid crystal display device is provided which is capable of improving quality of moving images. A field dividing driving operation is performed in which an odd field during which each of scanning electrodes in odd-numbered rows is sequentially driven and an even field during which each of scanning electrodes in even-numbered rows is sequentially driven occur, alternately and repeatedly, with time width of a refresh rate. In the former half of the odd field, display data is written in each of pixel regions corresponding to scanning electrodes in odd-numbered rows and, in the latter half of the odd field, black data is written in each of the pixel regions corresponding to scanning electrodes in the odd-numbered rows. In the former half of the even field, display data is written in each of pixel regions corresponding to scanning electrodes in the even-numbered rows and, in the latter half of the even field, black data is written in each of pixel regions corresponding to scanning electrodes in the even-numbered rows.

A liquid crystal display replaces the common electrodes of a conventional LCD with a plurality of switch electrodes. The plurality of switch electrodes is grouped into several switch electrode sets. Each of the switch electrode sets' potential is modulated by a different driving circuit. The driving circuits can also separately modulate the potentials of the switch electrode sets according to the scanning sequence of the LCD.

The invention discloses an intelligent distribution unit-area simulation device. The intelligent distribution unit-area simulation device comprises a high-voltage incoming line, a transformer, an analog voltage source, a metering mutual inductor, a measuring mutual inductor, fault simulators, virtual load analog current sources, outgoing line switches, intelligent ammeters, a reactive compensation controller and a rural power grid intelligent distribution transformer terminal. The high-voltage incoming line is connected to the metering mutual inductor through the transformer, the analog voltage source is connected to the metering mutual inductor, the metering mutual inductor is connected with the measuring mutual inductor through one fault simulator, one virtual load analog current source and another fault simulator in sequence, the intelligent ammeters and the measuring mutual inductor are connected with the metering mutual inductor, the metering mutual inductor is connected to the rural power grid intelligent distribution transformer terminal, the outgoing line switches are connected with the measuring mutual inductor, and the intelligent ammeters are connected through RS485. An intelligent distribution unit-area measures electric power operation data of the distribution transformer, carries out dynamic reactive power compensation, eliminates harmonic distortion, deals with asymmetry of phase voltages and eliminates voltage fluctuation and flickering, so that power supply reliability and electric energy quality are improved.