33results about How to "Solve afterimage" patented technology

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 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 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 data compression method for intelligent accelerating image display and a device. The method comprises the following steps: providing original image data and converting the original image data into YUV codes from RGB codes; compressing the original image data which is converted into the YUV codes; writing the compressed original image data into a storage medium according to a preset mode; uncompressing the compressed original image data; converting the original image data into the RGB codes from the YUV codes; and outputting the original image data to a display device by using a driving unit. The invention can rapidly process the image information and effectively solve the problem of generating ghosts on a LCD screen.

The invention relates to a driving voltage compensation method and circuit of a display. The method includes: setting a reference TFT; obtaining the driving current of the reference TFT; obtaining a compensation voltage value according to the driving current; and compensating the driving voltage of the TFT in the display area according to the compensation voltage value. In the embodiment of the present invention, by setting a reference TFT to obtain the drift of the IV characteristic curve of the TFT in the display area, and obtaining the compensation voltage value through the drift value of the driving current, the driving voltage of the TFT in the display area is compensated, thereby solving the problem caused by the long-term voltage difference This causes the IV characteristic curve of the TFT to drift, which in turn leads to image sticking or flickering on the display.

The invention discloses a display screen control method, device and display screen drive circuit, wherein the method comprises the steps that a present state of a terminal display screen is determined; if the display screen is at a black screen state, and it is determined whether or not a terminal is at a black screen gesture working state; if yes, a shared circuit is controlled to be alternatively connected with a scanning drive power and an earth point. According to the method, it is achieved that after a scanning operation is completed by the shared circuit, the shared circuit is connectedwith the earth point to quickly remove residual charges remaining on the shared circuit, thereby effectively solving the problem that screen flashing and ghost shadow occur when a follow-up display screen displays images, the reliable guarantee is provided for the displayed images of the display screen, and the user good use feeling is greatly improved.

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, which relate to the field of display technology, having a display area and a non-display area surrounding the display area, including: a base substrate, a common electrode layer, a first passivation layer, and a pixel electrode arranged in sequence layers and an alignment film; the pixel electrode layer includes a plurality of pixel electrodes arranged in an array along the first direction and the second direction, and the common electrode layer includes a common electrode; the first passivation layer includes a plurality of first hollow parts, and the first hollow The part exposes at least part of the common electrode, and the first hollow parts are all located in the display area; in the display area, along the first direction, at least one first hollow part is provided on one side of at least part of the pixel electrodes; the alignment film passes through the first hollow part in contact with the common electrode. The invention solves the problem that charged ions are easily gathered on the surface of the alignment film in the display panel in the prior art.

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.