33results about How to "Solve afterimage" patented technology

The invention discloses a pixel circuit, a driving method of the pixel circuit and an organic light-emitting display device. Because of influences of the parasitic capacitance of an organic light-emitting diode, after each frame ends, electricity stored by the capacitance of the organic light-emitting diode is released, a light-emitting phenomenon happens when the current passes the organic light-emitting diode, and therefore a ghost shadow happens to the organic light-emitting display device. The pixel circuit is provided with a reverse initialization transistor (a seventh transistor) used for performing reverse initialization on the anode of the organic light-emitting diode, and therefore the ghost shadow problem of the organic light-emitting display device is effectively solved. According to the active matrix organic light-emitting display device, when the pixel circuit responds to a digital signal, it can be displayed that reverse initialization is performed once on the organic light-emitting diode at each frame of time, the problem that the ghost shadow happens to the parasitic capacitance of the organic light-emitting diode is effectively solved, and the display quality of the organic light-emitting display device is effectively improved.

The invention discloses a method for solving the smear problem of LCD pictures, wherein, black pictures are inserted in a blank time domain between two frames. By the way of inserting the black pictures in the line scanning blank time domain, the method helps fundamentally solve the image sticking problem while fast and dynamic pictures are displayed on LCD in the case of no change of system frequency of traditional drive and no addition of complexity of movable hardware route.

The invention relates to a device and a method for preventing display equipment from forming incomplete images. In the device, an input signal of a display screen is accessed to the device; and the device performs amendment on the content of a picture pointedly by analyzing the characteristic of the picture. A detailed method of the amendment comprises the steps of: for a part remaining still fora long time, selecting a few points at random, and amending the picture into a black picture for a short time; and outputting data of the amended picture to the display screen to achieve the aims of preventing the display equipment from forming the incomplete images and influencing the picture effect as little as possible. The device and the method can effectively solve the problem of the incomplete images of the display equipment and improve the picture quality.

The embodiment of the invention discloses a pixel circuit, a display panel and a driving method of the pixel circuit. The pixel circuit comprises a data writing module, a driving transistor, a storagemodule, a light-emitting control module, a light-emitting module, a first initialization module and a second initialization module. The first initialization module is connected between a first reference voltage input end and a grid electrode of the driving transistor. The first initialization module is used for initializing the grid electrode of the driving transistor under the control of a control signal input by the control end of the first initialization module. The second initialization module is connected between a second reference voltage input end and a first pole of the driving transistor. The second initialization module is used for initializing the first pole of the driving transistor under the control of an input signal of the control end of the second initialization module. The control ends of the first initialization module and the second initialization module are electrically connected with a first scanning signal input end. Compared with the prior art, the problem of ghosting is solved, and the display effect of the display panel is improved.

The invention discloses a liquid crystal display device which comprises an upper baseplate and a lower baseplate, wherein the lower baseplate is arranged facing to the upper baseplate; the lower baseplate is provided with a plurality of gate lines, data lines and common lines; the gate lines and the data lines are mutually vertical and definite a plurality of pixel areas. Each pixel area comprises pixel electrodes, common electrodes, a first thin film transistor, a second thin film transistor and a liquid crystal layer, wherein the common electrodes and the pixel electrodes are arranged in a staggered way; the first thin film transistor is used for controlling the pixel electrodes and inputting signals; the second thin film transistor is used for controlling the common electrodes and inputting signals; the liquid crystal layer is sandwiched between the upper baseplate and the lower baseplate; and when the first thin film transistor is switched off, the second thin film transistor is also switched off at the same time. Feed-through potential drop of an entire row of the gate lines does not need to be adjusted by potential provided by the common lines through the structural design, thereby the phenomenon of residual DC can not be produced, and the problem of residual shade can be fundamentally solved.

The invention discloses a display panel, a driving method thereof and a display device. A light-emitting element of the display panel is driven by a pixel circuit comprising a driving transistor, a first initialization module, a data writing module and a light-emitting control module, and in the reset stage of the driving period of the pixel circuit, the first initialization module responds to a first driving signal; a reference signal is used for carrying out preset reset processing on a first node of a pixel circuit, the reference signal comprises a periodic state signal, each period of the signal comprises a first state signal and a second state signal which are alternate, and the preset reset processing comprises carrying out alternate reset by using the first state signal and the second state signal. Therefore, the hysteresis effect of the driving transistor caused by the signal applied to the first node in the display process of the previous frame of picture is eliminated, the problem that the pixel circuit is influenced by the previous frame of picture in the process of driving the light-emitting element to emit light is avoided, and the problem of picture ghosting possibly occurring on the display panel is effectively solved.

A liquid crystal display panel comprises: a plurality of scanning lines, a plurality of data lines, a data driven circuit, a gray level processor and a memory. The minimal area enclosed by the data line and scanning line is defined as one pixel unit. The gray level processor receives the j(j>=1), j+1, k-1(j+2<=k<=h, h<=frame frequency), k frame gray level voltage from outside. When the j+1 frame of the pixel unit displays dynamic menu, and when the gray level voltage difference of the j and j+1 frames of the pixel unit is less than the gray level voltage difference of the j and k frames of the pixel unit, therefore the gray level voltages of the j+1 frame and k frame are exchanged. The memory stores the treated gray level output from the gray level processor and untreated residual gray level voltage output from the outside device, and the equal gray level voltages are output to the data driven circuit in turn. The liquid crystal display panel can improve the streaking phenomena of displaying dynamic menu.

The embodiment of the invention provides a display driving method, a driving circuit and a display device. The display driving method comprises the following steps: detecting a data latch signal output to a data driving circuit by a time sequence control circuit; after a first data latch signal after startup is detected, the power supply circuit is controlled to output a common voltage to the pixel circuit; wherein the data latch signal is used for controlling a data driving circuit to output data voltage to the pixel circuit. According to the display driving method and the display driving circuit provided by the embodiment of the invention, the data latch signal TP is introduced into the power supply circuit as a condition for triggering the output of the common voltage, so that the common voltage Vcom and the data voltage Source output can synchronously enter the pixel circuit of the display area, and the problems of white flashing and ghosting during startup can be fundamentally solved.

The invention relates to a driving voltage compensation method and a circuit of a display. The method comprises the following steps: setting a reference TFT; acquiring driving current of the referenceTFT; acquiring a compensation voltage value according to the driving current; and compensating the driving voltage of the display region TFT according to the compensation voltage value. Through the driving voltage compensation method disclosed by the embodiment of the invention, an IV feature curve drifting condition of the display region TFT is acquired by arranging one reference TFT, and the compensation voltage value is acquired through a drifting value of the driving current, the driving voltage of the display region TFT is compensated, thereby solving the a display image ghost or flickering problem caused by the IV feature curve drifting of the TFT due to long-term voltage difference.

A protection method for an OLED screen is used to protect a screen in an OLED display. The protection method for the OLED screen comprises the steps that screen signals of the OLED screen are sampled(S101); a control signal is output when changes of the sampled screen signals are detected and the duration of invariableness or periodical changing of the sampled screen signals within first preset time exceeds second preset time, wherein the first preset time exceeds the second preset time (S102); and the OLED screen is controlled to be restarted according to the control signal (S103). In this way, long-term invariableness or periodical changing of images of the OLED screen can be avoided; the problem about ghost shadows on the OLED screen can be solved; and no hardware components and hardware circuits are added, so the cost is reduced.

The invention discloses a pixel circuit, a method for driving the same and a display panel. The pixel circuit comprises a light emitting element, a driving transistor, a first reset module, a second reset module, a data writing module, a threshold compensating module and a holding module. The light emitting element is used for carrying out light emitting display in response to driving currents; the driving transistor is used for providing the driving currents for the light emitting element in light emitting phases; the first reset module is used for providing initialization voltages for a gridof the driving transistor in initialization phases; the second reset module is electrically connected with a first electrode of the driving transistor and is used for providing initialization voltages for the first electrode of the driving transistor in the initialization phases; the data writing module is used for writing data signals into the grid of the driving transistor; the threshold compensating module is used for compensating for threshold voltages of the driving transistor; the holding module is electrically connected with the grid of the driving transistor and is used for holding grid voltages of the driving transistor in the light emitting phases. According to the technical scheme, the pixel circuit, the method and the display panel in an embodiment of the invention have the advantages that the display uniformity can be improved, the problem of ghost shadow in display procedures can be solved, and display effects can be improved.

The invention discloses a common voltage driving circuit and a control method and display device thereof. The common voltage driving circuit comprises a first power switching tube and a second power switching tube which are in parallel connection; a first end of the first power switching tube is connected with a first control signal, a second end of the first power switching tube is connected witha signal input end, and a third end of the first power switching tube is connected with a signal output end; a first end of the second power switching tube is connected with a second control signal,a second end of the second power switching tube is connected with the signal output end, and a third end of the second power switching tube is connected with a grounding end. According to the common voltage driving circuit and the control method and display device thereof, by controlling the power switching tube of the common voltage driving circuit, a certain amount of offset voltage exists in output common voltage, the problem of charge residue or charge ghosting when a narrow viewing angle is switched to a wide viewing angle in a liquid crystal displaying device is solved, and the visual viewing effect of a user is improved.

The invention relates to the technical field of screen display, in particular to a method for testing screen ghosting, which comprises the following steps of: S1, setting all gray values of pixel points on a screen to be 128; S2, testing for the first time and recording the overall brightness value LVAP of the screen; S3, setting all gray values of pixel points on the screen to be N; S4, switching the gray values of the pixel points on the screen from all setting to N to all setting to 128; S5, carrying out mura detection on the screen in the darkroom; S6, testing for the second time and recording the overall brightness value LVBP of the screen; S7, calculating a brightness difference value ratio ABS (LVAP-LVBP) / LVAP; S8, comparing the brightness difference value ratio with 2%, and determining that the screen has no ghost shadow when the brightness difference value ratio is less than or equal to 2%; and when the brightness difference ratio is greater than 2%, determining that the screen has ghosting.

The invention discloses a method for eliminating a shutdown afterimage on a panel. The method for eliminating the shutdown afterimage on the panel includes the steps: acquiring a current voltage of astorage electrode when the display panel is shut down; acquiring a set voltage of the storage electrode; and updating the set voltage of the storage electrode according to the current voltage of the storage electrode. The invention further discloses a device for eliminating the shutdown afterimage on the panel. The storage electrode in a control system is set to a set voltage adjustable, and whenthe display panel is shut down, the set voltage of the reference electrode is updated, the influence of the storage electrode on a data line is reduced, charge in the pixel structure is effectively released, and the display panel is blackened to solve the afterimage problem.

The invention discloses a liquid crystal display device which comprises an upper baseplate and a lower baseplate, wherein the lower baseplate is arranged facing to the upper baseplate; the lower baseplate is provided with a plurality of gate lines, data lines and common lines; the gate lines and the data lines are mutually vertical and definite a plurality of pixel areas. Each pixel area comprisespixel electrodes, common electrodes, a first thin film transistor, a second thin film transistor and a liquid crystal layer, wherein the common electrodes and the pixel electrodes are arranged in a staggered way; the first thin film transistor is used for controlling the pixel electrodes and inputting signals; the second thin film transistor is used for controlling the common electrodes and inputting signals; the liquid crystal layer is sandwiched between the upper baseplate and the lower baseplate; and when the first thin film transistor is switched off, the second thin film transistor is also switched off at the same time. Feed-through potential drop of an entire row of the gate lines does not need to be adjusted by potential provided by the common lines through the structural design, thereby the phenomenon of residual DC can not be produced, and the problem of residual shade can be fundamentally solved.

The invention provides a manufacturing method of a component electrode. The manufacturing method comprises the following steps: (1) casting a ferrite base material: coating and casting ferrite slurry, and drying to form the ferrite base material; (2) printing a conductive adhesive on a release film: printing a photosensitive conductive adhesive layer on the PET release film, and heating and drying; (3) mask exposure: an electrode pattern mask is placed above the dried photosensitive conductive adhesive, and the photosensitive conductive adhesive is exposed, cured and denatured through ultraviolet irradiation; (4) showering and developing: showering and developing by using a developing solution, and forming an electrode pattern on the PET release film; and (5) temperature and pressure transfer: transferring the electrode pattern formed on the PET release film to the ferrite base material under the action of certain temperature and pressure. According to the method, the problems of ghost shadow, defect and the like when the ferrite base material is exposed and developed to manufacture the electrode are solved through the self-made ferrite slurry, the photosensitive conductive adhesive and the temperature-pressure transfer process.

A driving circuit for a liquid crystal display comprises a light sensitive element configured to be arranged on a liquid crystal panel of the liquid crystal display, and detect an operation state of a backlight source of the liquid crystal display; and a reset signal output device configured to receive an input signal from the light sensitive element in accordance with the operation state of the backlight source, and output a reset signal to a gate line driver of the liquid crystal display so as to turn on all of gate lines on the liquid crystal panel.

In the pixel circuit and its driving method and organic light emitting display device according to the present invention, due to the influence of the parasitic capacitance of the organic light emitting diode itself, after each frame ends, the electricity stored in the capacitance of the organic light emitting diode itself is released, and the current flows through the organic light emitting diode. During the diode period, there is a phenomenon of light emission, which causes afterimages to appear in the organic light-emitting display device. The pixel circuit has a reverse initialization transistor (seventh transistor) for reverse initialization of the anode of the organic light emitting diode, thereby effectively solving the image sticking problem of the organic light emitting display device. In the active matrix organic light-emitting display device of the present invention, when the pixel circuit responds to a data signal, it can display that the organic light-emitting diode is reversely initialized once for each frame time, which effectively solves the problem of organic light-emitting diode parasitic The image sticking problem caused by capacitance effectively improves the display quality of the organic light emitting display device.

The present application discloses a method for eliminating residual image after shutdown on the panel. The method for eliminating residual image after shutdown on the panel includes the following steps: obtaining the initial voltage of the data line and the set voltage of the reference electrode; when the display panel is powered off, obtaining the current voltage of the data line; and updating the set voltage of the reference electrode according to the initial voltage of the data line and the current voltage of the data line. The application also discloses a method and a device for eliminating afterimages after shutdown on the panel. Set the reference electrode in the control system to a set voltage that can be adjusted. When the display panel is turned off, the set voltage of the reference electrode is updated to reduce the clamping pressure between the voltage guideline of the data line and the set voltage of the reference electrode. Pixel structure The charge in the battery is effectively released, and the screen of the display panel becomes black, which solves the afterimage problem.

The invention discloses a display panel and a display device, and relates to the technical field of display. The display panel comprises a display area and a non-display area surrounding the display area; the display panel comprises a substrate, a common electrode layer, a first passivation layer, a pixel electrode layer and an alignment film which are sequentially arranged; the pixel electrode layer comprises a plurality of pixel electrodes arranged in an array in the first direction and the second direction; the common electrode layer comprises a common electrode; the first passivation layercomprises a plurality of first hollow-out parts which expose at least part of the common electrodes; the first hollow-out parts are positioned in the display area; at least one first hollow-out partis arranged on one side of at least part of the pixel electrodes in the display area along the first direction; and the alignment film is in contact with the common electrodes through the first hollow-out parts. The problem that in the prior art, the surface of the alignment film in the display panel is easy to gather with ions is solved.

The invention discloses a common voltage driving circuit and a control method and display device thereof. The common voltage driving circuit comprises a first power switching tube and a second power switching tube which are in parallel connection; a first end of the first power switching tube is connected with a first control signal, a second end of the first power switching tube is connected witha signal input end, and a third end of the first power switching tube is connected with a signal output end; a first end of the second power switching tube is connected with a second control signal,a second end of the second power switching tube is connected with the signal output end, and a third end of the second power switching tube is connected with a grounding end. According to the common voltage driving circuit and the control method and display device thereof, by controlling the power switching tube of the common voltage driving circuit, a certain amount of offset voltage exists in output common voltage, the problem of charge residue or charge ghosting when a narrow viewing angle is switched to a wide viewing angle in a liquid crystal displaying device is solved, and the visual viewing effect of a user is improved.

The embodiment of the invention discloses an image processing method. The method comprises the following steps: acquiring multiple frames of to-be-processed images in a to-be-processed video for a target object; processing the multiple frames of to-be-processed images, and determining target parameters of target pixel points of the multiple frames of to-be-processed images; determining whether the moving speed of the target object accords with a target set speed or not based on the target parameter of the target pixel point; under the condition that the moving speed of the target object accords with the target set speed, performing first processing on pixel points of the to-be-processed images to determine a target area of the target object; and under the condition that the moving speed of the target object does not conform to the target set speed, carrying out second processing on the pixel points of the to-be-processed images to determine a target area of the target object. The embodiment of the invention further discloses an image processing device.

A liquid crystal display panel comprises: a plurality of scanning lines, a plurality of data lines, a data driven circuit, a gray level processor and a memory. The minimal area enclosed by the data line and scanning line is defined as one pixel unit. The gray level processor receives the j(j>=1), j+1, k-1(j+2<=k<=h, h<=frame frequency), k frame gray level voltage from outside. When the j+1 frame of the pixel unit displays dynamic menu, and when the gray level voltage difference of the j and j+1 frames of the pixel unit is less than the gray level voltage difference of the j and k frames of the pixel unit, therefore the gray level voltages of the j+1 frame and k frame are exchanged. The memory stores the treated gray level output from the gray level processor and untreated residual gray level voltage output from the outside device, and the equal gray level voltages are output to the data driven circuit in turn. The liquid crystal display panel can improve the streaking phenomena of displaying dynamic menu.

The invention discloses a wide visual angle and narrow visual angle switching device and a wide visual angle and narrow visual angle switching method. The wide visual angle and narrow visual angle switching device comprises a display control module and a display drive module which are connected through a connector, wherein the display control module comprises a control unit, a transmitter and a wide visual angle and narrow visual angle signal switching module; the display drive module comprises a time schedule controller and a wide visual angle and narrow visual angle drive module. For the wide visual angle and narrow visual angle switching device and the wide visual angle and narrow visual angle switching method disclosed by the invention, the control unit controls a self-refresh signal and a wide visual angle and narrow visual angle signal, on one hand, the problem of residual charge or ghost existing when the narrow visual angle is switched to the wide visual angle is solved, a micro control unit does not need to be increased in the time schedule controller, and the sacrifice of partial functions is not needed; on the other hand, during switching of the wide visual angle and thenarrow visual angle, a system is in the state of quitting the PSR, so that the problem that no black picture insertion is available during wide visual angle and narrow visual angle switching under the PSR condition is avoided, and finally, the visual watching effect of a user is promoted.

The present application discloses a method for eliminating power-off residual image on the panel. The method for eliminating power-off residual image on the panel includes the following steps: when the display panel is powered off, obtain the current voltage of the storage electrode; obtain the setting of the storage electrode voltage; and updating the set voltage of the storage electrode according to the current voltage of the storage electrode. The application also discloses a method and a device for eliminating afterimages after shutdown on the panel. Set the storage electrode in the control system to a set voltage that can be adjusted. When the display panel is turned off, the set voltage of the storage electrode is updated to reduce the impact of the storage electrode on the data line. The charge in the pixel structure is effectively released, and the display The panel screen becomes black, solving the afterimage problem.