517 results about "Flicker" patented technology

A video signal including illumination flicker component is integrated at each of unit areas (horizontal lines) in a frame (field) of the video signal. The integrated level at each of the unit areas at the frame and the integrated level at the corresponding unit area of an adjacent frame are averaged. Dividing is effected between results of the averaging and integrating every unit area. It is judged whether flicker exists in the video signal by frequency-analyzing results of the dividing result at the unit areas. The unit area may be plural adjacent lines where flickering are negligible. The averaging circuit may be circulation type of or FIR filter. Threshold level for judging the flicker is changed according to a shutter speed control signal. Flicker compensation may be executed by controlling shutter speed or the AGC according to flicker judging result. A still condition at a block in a frame may be detected from the integration result at plural frames. When the block is judged to be still, the flicker is judged. An ac line frequency detection is also disclosed to detect the frequency of the ac line from a video signal generated under illumination including flicker. An imaging circuit may be provided to generate the video signal therein.

The present invention provides a display device with reduced power consumption and that reduces changes in luminance, and perceptibility of flicker, and a driving method thereof. A display device according to an exemplary embodiment comprises: a display panel configured to display a still image and a motion picture; a signal controller configured to control signals for driving the display panel; and a graphics processing unit configured to transmit input image data to the signal controller, wherein the signal controller comprises a frame memory configured to store the input image data, and the display panel is driven at a first frequency when the motion picture is displayed and the display panel is driven at a second frequency that is lower than the first frequency when the still image is displayed.

The invention provides a display image flicker adjusting circuit and a method and a display device, which belong to the technical field of display, and can solve the problem that a display image flickers at the refreshing frequency switching moment of display equipment matched with a G-sync display technology at present. The display image flicker adjusting circuit comprises an identification module used for identifying a first refresh frequency of a current frame of display image and a refresh frequency of a next frame of display image according to a refresh frequency control signal; an obtaining module is used for obtaining first brightness corresponding to a preset gray scale under the first refresh frequency and second brightness corresponding to a preset gray scale under the second refresh frequency according to the corresponding relation between the gray scales and the brightness under the different refresh frequencies; and the compensation module is used for compensating the second brightness of the next frame of display picture according to the difference between the second brightness and the first brightness.

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.

Viewing angle characteristics on the entire display surface are improved while suppressing harmful effects such as flicker and banding caused by viewing angle improvement control. A liquid crystal display apparatus (1) includes: a liquid crystal panel (11) which includes a plurality of pixels arranged in a matrix; a drive control unit (24) which performs viewing angle improvement processing by converting a gradation of a video signal input to the pixel; and a processing object determination unit (22) which determines whether or not an image displayed on each of the pixels of the liquid crystal panel (11) is an image having an intermediate color. The drive control unit (24) is configured to perform the viewing angle improvement processing on the pixel determined by the processing object determination unit (22) such that the pixel displays the image having the intermediate color.

A method for eliminating flicker of a multi-exposure imaging system is provided. The method includes the steps of: capturing a long exposure image based on a long exposure from a scene; capturing a short exposure image based on a short exposure from the scene; obtaining an exposure ratio of the long exposure to the short exposure; generating a long accumulated value by accumulating pixel values of a portion of the long exposure image; generating a short accumulated value by accumulating pixel values of a portion of the short exposure image corresponding to the portion of the long exposure image; and generating a flicker gain according to the long average value, the short average value and the exposure ratio.

A gate driver circuit, a display panel, and a display device. A number of emission start signals, with at least one a delay time, a pulse width, or a combination thereof, are supplied in a frame period in which display driving is performed at a low driving frequency. This decreases a degree by which luminance appearing in the frame period is reduced, or changes characteristics of frequency components of luminance, thereby preventing flicker from being observed. The display driving is performed at the low driving frequency reduces power consumption, and is performed at a lower driving frequency to improve the efficiency of the display device.

The invention relates to a flicker value calculation method based on improved FFT and an inverter. In order to solve the technical problems, the flicker value calculation method based on the improved FFT and the inverter are provided, and high-precision flicker value calculation is achieved. According to the technical scheme, the method includes the steps that (1), all phases of voltage signals are sampled to obtain a voltage sampled sequence; (2), a voltage root-mean-square value is calculated according to sampling length per semi-circle wave, so that a voltage root-mean-square value sequence is obtained; (3), the average value of the voltage root-mean-square value sequence is calculated, and the average value is subtracted from each voltage root-mean-square value, so that a new voltage root-mean-square value sequence is obtained; the new voltage root-mean-square value sequence is windowed, FFT is performed, and amplitude frequency is corrected through double spectrum line interpolation operation; (5), curve fitting is performed on voltage fluctuation and fluctuation frequency discrete points; (6), please see the formula in the specification, a transient flicker value P is calculated; (7), the steps from one to six are repeated, all transient flicker values P within ten minutes are calculated, and according to the formula in the specification, a short-time flicker value Pst is calculated. The flicker value calculation method and inverter are used for the field of electric power technologies.

Provided is a display device capable of suppressing electric power consumption as well as displaying an image with excellent quality. A host control section (30) in accordance with an aspect of the present invention includes: an image determining section (35) for determining whether or not an image has a characteristic of causing flicker to be easily recognizable; and a driving changing section (36) for, in a case where it is determined that the image has the characteristic of causing flicker to be easily recognizable, determining that (i) a display of the image is to be refreshed at a first refresh rate during a first period and (ii) the display of the image is to be refreshed at a different second refresh rate during a second period.

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.

One embodiment of the present invention sets forth a technique for reducing flicker in image frames captured with a rolling shutter. A flicker detection and correction engine selects a first channel from a first image frame for processing. The flicker detection and correction engine subtracts each pixel value in the first channel from a corresponding pixel value in a prior image frame to generate a difference image frame. The flicker detection and correction engine identifies a first alternating current (AC) component based on a discrete cosine transform (DCT) associated with the difference image frame. The flicker detection and correction engine reduces flicker that is present in the first image frame based on the first AC component. One advantage of the disclosed techniques is that the flicker resulting from fluctuating light sources is correctly detected and reduced or eliminated irrespective of the frequency of the fluctuating light source.

The invention relates to an electrode bridging connecting structure for inhibiting picture interference of a capacitance type touch screen. The electrode bridging connecting structure comprises a bottom connector made of a transparent conducting film, an insulating padding block arranged on the bottom connector, and an elongated connecting bridge being made of a metal film and bridging over the insulating padding block, wherein the bottom connector is used for connecting an electrode X extending along an X direction, the connecting bridge is used for connecting an electrode Y extending along a Y direction, and an inclined angel is formed by the extending direction and the Y direction of the connecting bridge. By the adoption of the electrode bridging connecting structure, the connecting bridge is prevented from covering all subpixels, therefore the color deviation of a pixel in which the subpixels exist is inhibited; when one subpixel is covered, adjacent pixels with different colors are covered partially; when the visual angel of eyes observing a picture changes slightly, the partial covering results in the transfer of the covered area among the subpixels in a gradually varied way, therefore the flicker of display pixels, which can be observed by naked eyes, can be avoided, and picture flicker can be reduced effectively.

An imaging apparatus according to one embodiment of the present invention includes a flicker correction unit for correcting a flicker component using a correction gain. The flicker correction unit includes an integrating unit for calculating a line integrated value from a video signal in one horizontal line in one vertical synchronization period, a normalization unit for normalizing the line integrated value for a plurality of the vertical synchronization periods so as to calculate a normalized line integrated value, an inter-frame DFT processing unit for performing Discrete Fourier Transform on the normalized line integrated value for the plurality of vertical synchronization periods, a flicker component calculation unit for calculating information of a flicker component based on a Fourier Transform processing result, and a correction gain calculation unit for calculating a correction gain based on the information of the flicker component in two or more horizontal lines.

A novel highly reliable display device is provided. Further, a novel display device capable of displaying images with less flicker is provided. Further, a display device capable of displaying eye-friendly still images is provided. The display device includes a feedthrough correction circuit which corrects a primary image signal. The feedthrough correction circuit corrects the primary image signal to compensate predicted feedthrough.

Suppression of a flicker and appreciated AF accuracy are both taken into account in a program diagram for AF for determining shooting conditions for capturing an image for executing an auto-focus detection process in a moving image/still image continuous shooting mode for recording a still image and moving images of a predetermined period just before the still image capturing. Specifically, in a sector of low luminance in which ISO sensitivity is not a minimum value, a shutter speed that can suppress the flicker is set, and then the ISO sensitivity is reduced to the minimum value to allow obtaining a moving image with the suppression of the flicker.

In one embodiment, a method a method of displaying an image on a display device is described. The display device includes a plurality of clusters. Each cluster has a plurality of pixels and an independent light source associated therewith. Each of the plurality of clusters are illuminated with their associated independent light source. The plurality of pixels in a cluster are refreshed with bits of gray scale. Simultaneously with the refreshing, the light source associated with the cluster where the plurality of pixels are being refreshed is switched off. When the plurality of pixels have been refreshed, the light source is switched on with a predetermined intensity of light. Each of the clusters are refreshed at a rate that is fast enough to eliminate flicker.

The present invention provides a liquid crystal display that divides pixels located in each row into a plurality of blocks, and calculates, for each of first to third colors, a pair of colors applied to each block containing a plurality of pixels. The grayscale difference between every two image data of adjacent odd pixels and even pixels. It can be determined that if the gray level difference between each pair of odd pixels and even pixels in a block of at least one color is equal to or greater than the critical value, then the block is the first point block or the second point according to the sign of the gray level difference. Two point blocks. If the current block is the first dot block and the previous block in the previous row and column is the second dot block, then the current block in the current row and column is determined to be a single dot block. If the number of single-dot blocks is a predetermined percentage of the total number of blocks, it can be determined to generate a single-dot pattern and change the single-dot inversion of the liquid crystal display to another inversion. In this way, the pattern that produces flicker is determined and the inversion type is changed to reduce flicker.