37results about How to "Eliminate afterimage phenomenon" patented technology

The invention relates to the technical field of display, in particular to a pixel circuit, a pixel circuit driving method and a thin film transistor backplane. The pixel circuit comprises a driving transistor, a signal loading module, a light emitting control module and a storage capacitor. The pixel circuit provided by the invention has the advantages that in the light emitting diode driving process, the ghosting phenomenon caused by threshold voltage drift and the heterogeneity caused by the self threshold voltage of the driving transistor are effectively eliminated; the problem of brightness nonuniformity caused by different threshold voltages of the driving transistor among organic light emitting diodes of different pixel units in an active matrix organic light emitting diode display device is avoided; the driving effect of the pixel circuit on organic light emitting diodes is improved, and the display quality of the active matrix organic light emitting diode display device is further improved.

The present invention relates to the technical field of display and discloses a pixel driving circuit which comprises a data line, a gate line, a first power supply line, a second power supply line, a light emitting device, a driving transistor, a storage capacitor, a reset unit, a data writing unit, a compensation unit and a light emission control unit. The present invention also discloses a driving method, an array substrate and a display device. According to the pixel driving circuit of the present invention, the display unevenness caused by a driving transistor threshold voltage difference can be compensated and eliminated.

The invention discloses a display panel and a display device. The display panel comprises data lines, a pixel driving circuit, a light-emitting device and a voltage compensation circuit. The pixel driving circuit comprises a data signal input end and an output end, the data signal input end of the pixel driving circuit is connected with the data line, and the output end of the pixel driving circuit is connected with the light-emitting device; the voltage compensation circuit comprises a sampling and conditioning unit; the first switch unit comprises a control end, an input end and an output end; the control end of the first switch unit is connected with the output end of the sampling and conditioning unit, and the input end of the first switch unit is connected with the output end of the pixel driving circuit; the compensation unit comprises an input end and an output end, the input end of the compensation unit is connected with the output end of the first switch unit, and the output end of the compensation unit is connected with the data line. And the compensation unit generates compensation voltage to the data line according to the driving current of the pixel driving circuit, sothat the ghost phenomenon of the display image is eliminated and the display effect is improved.

The invention provides a GOA circuit and a liquid crystal display device. The GOA circuit comprises multiple gate drive modules used for inputting scanning signals into a scanning line. Each gate drive module comprises a GOA unit used for providing initial scanning voltage, and an output control unit connected with the corresponding GOA unit and used for eliminating ghost shadows of the liquid crystal display device, wherein the output control unit comprises a first control branch used for controlling the corresponding gate drive module to output switching scanning voltage related to the initial scanning voltage, and a second control branch used for controlling the corresponding gate drive module to output switching scanning voltage unrelated to the initial scanning voltage. According to the GOA circuit and the liquid crystal display device, the output control units are additionally arranged at an output end of an existing GOA unit, so that the ghost shallow phenomenon is eliminated, and a display effect is improved.

The invention relates to the technical field of display, in particular to pixel drive units, a drive method of the pixel drive units, and a pixel circuit comprising the pixel drive units. The pixel drive units comprise drive sub circuits and control sub circuits. The control sub circuits are connected with data lines, and the drive sub circuits are connected with the control sub circuits. The pixel drive units effectively eliminate heterogeneity caused by the threshold voltages of drive transistors and the shadow phenomenon caused by threshold voltage drifting in the process of driving light-emitting devices. The uneven brightness problem of an active matrix OLED due to the fact that the threshold voltages of the drive transistors of the light-emitting devices of the different pixel drive units in the active matrix OLED are different is avoided, the drive effect of the pixel drive units on the light-emitting devices is improved, and quality of the active matrix OLED is further improved.

The present disclosure relates to a field of display technology, and particularly to a pixel circuit and a method for driving the same. The pixel circuit includes a driving sub-circuit, a resetting sub-circuit, and a charging sub-circuit, wherein the driving sub-circuit includes a driving transistor, a first transistor, a third transistor, a first storage capacitor and a second storage capacitor; the resetting sub-circuit discharges the first storage capacitor and the second storage capacitor under the control of a first scan signal outputted from the first scan signal line; and the charging sub-circuit includes a fifth transistor and a sixth transistor. With the pixel circuit of the present disclosure, non-uniformity of driving transistors caused by threshold voltages of the driving transistors and an image sticking phenomenon caused by drifts of the threshold voltages of the driving transistors may be eliminated through the compensation; and the problem of non-uniform luminance among the light emitting devices in different pixel units of an Active Matrix Organic Light Emitting Diode Display caused by different threshold voltages of the driving transistors in the different pixel units may be avoided.

The invention provides a light-emitting diode (LED) display system capable of eliminating the residual shadow of an LED display screen, and a line scanning circuit of the system. The line scanning circuit comprises a plurality of line switching tubes, a plurality of pre-discharge switches and line scanning control logic, wherein the first connecting end of each line switching tube is connected to supply voltage, and the second connecting end of each line switching tube is connected to a corresponding line; the first connecting end of each pre-discharge switch is connected to pre-discharge reference voltage, and the second connecting end of each pre-discharge switch is connected to the corresponding line; the line switching tube and the pre-discharge switch which are connected to the same line correspond to each other; the line scanning control logic is used for providing a plurality of line driving signals for the control ends of all the line switching tubes so as to control on or off of all the line switching tubes, and is used for providing a plurality of pre-discharge control signals for the control ends of all the pre-discharge switches so as to control on or off of all the pre-discharge switches. Pre-discharge is carried out on the lines in an LED array, so that the residual shadow of the LED display screen can be effectively eliminated.

The invention provides an alignment film and a preparation method thereof, a display panel and a display device, which belong to the technical field of display and aim to solve the problem that residual images which occur during display cannot be eliminated in an existing display panel. The alignment film comprises a functional material, wherein the functional material is formed in a way that polyimide reacts with captured monomers in an alcoholysis mode, and the functional material is used for generating functional free radicals which can capture ion impurities.

The present invention relates to the field of display technology, and discloses a pixel drive circuit, including: data lines, gate lines, first power lines, second power lines, reference signal lines, light emitting devices, drive transistors, storage capacitors, reset units, data Write unit, compensation unit and light emission control unit. The invention also discloses a driving method, an array substrate and a display device. The pixel driving circuit of the present invention can compensate and eliminate display unevenness caused by the threshold voltage difference of driving transistors.

A method for quickly eliminating the shutdown afterimage of LCD includes receiving control signal, comparing the first with the second reference voltage, and outputting start signal to the controller of LCD power supply and fast discharge circuit for fast discharge if the first reference voltage is less than or equal to the second one. Its circuit is composed of manual selector, automatic detector, selection switch, fast discharge circuit and controller of LCD power supply.

The invention relates to the technical field of display, in particular to a pixel circuit and a driving method of the pixel circuit. The pixel circuit comprises a driving sub-circuit, a reset sub-circuit and a charging sub-circuit, wherein the driving sub-circuit comprises a driving transistor, a first transistor, a third transistor, a first storage capacitor and a second storage capacitor; the reset sub-circuit is used for discharging the first storage capacitor and the second storage capacitor under the control of a first scanning signal output from a first scanning signal line; the charging sub-circuit comprises a fifth transistor and a sixth transistor. According to the pixel circuit, heterogeneity caused by the threshold voltage of the driving transistor and the ghost shadow phenomenon caused by threshold voltage drifting can be effectively eliminated through compensation; the problem that the brightness of an active matrix light-emitting organic electrical display tube is not uniform because light-emitting devices of different pixel units in the active matrix light-emitting organic electrical display tube are different in threshold voltage of the driving transistor is avoided.

The present invention relates to the field of display technology, and discloses a pixel drive circuit, including: data lines, gate lines, first power lines, second power lines, light emitting devices, drive transistors, storage capacitors, reset units, data writing units, Compensation unit and lighting control unit. The invention also discloses a driving method, an array substrate and a display device. The pixel driving circuit of the present invention can compensate and eliminate display unevenness caused by the threshold voltage difference of driving transistors.

The invention provides an LED display system capable of eliminating a ghosting image on an LED display screen and an LED driving circuit. The LED driving circuit comprises a control logic unit and at least one column control circuit, wherein the column control circuit comprises an output driving unit, a ghosting image removing unit and a precharge switch. After a column driving control signal from the control logic unit jumps to be invalid, the output driving unit stops supplying driving current, and the output driving unit is detected by the ghosting image removing unit, so as to determine whether the output driving unit stops supplying the driving current; if the output driving unit stops supplying the driving current, a valid precharge control signal is output to control the precharge switch to be on so as to connect precharge reference voltage and a column wire; thus, the ghosting image of the LED display screen can be eliminated, and the LED driving circuit can be suitable for different driving currents.

The invention relates to the field of display technology and discloses a pixel driving circuit, which includes: a data line, a gate line, a first power line, a second power line, a light-emitting device, a driving transistor, a storage capacitor, a reset unit, and a data writing unit. Compensation unit and lighting control unit. The invention also discloses a driving method, array substrate and display device. The pixel driving circuit of the present invention can compensate and eliminate display unevenness caused by threshold voltage differences of driving transistors.

The invention provides a control device for a display device and a control method for a level conversion module, the control device comprises the level conversion module, a pull-up circuit and a gate drive circuit, and the level conversion module is connected with the pull-up circuit and the gate of a plurality of transistors in the gate drive circuit. A first negative voltage module in the pull-up circuit is connected with the source electrodes of part of the transistors, and a second negative voltage module is connected with the source electrodes of the remaining part of the transistors. When the level conversion module receives a power-down signal, voltage of grids of a plurality of transistors in the grid driving circuit can be pulled up to be first voltage, voltage of a first negative voltage module and a second negative voltage module can be pulled up to be second voltage, the second voltage is smaller than the first voltage, and the second voltage is opening voltage Vgh of the plurality of transistors. The voltage of the grid electrode of the transistor in the liquid crystal panel can be pulled up to be high voltage, and then the discharging speed of the liquid crystal panel is increased.

The invention discloses a source drive device, its polarity inversion control method and a liquid crystal display device. A polarity signal control unit is added to the source drive device, and the output terminal of the polarity signal control unit is connected to the positive and negative poles. The first channel selection module in the sex reversal control unit is connected to the control terminal of the second channel selection module. The trigger control signal input to the control terminal of the polarity signal control unit is used to control the inversion of the polarity inversion control signal output by the polarity signal control unit, specifically each time a trigger is input to the control terminal of the polarity signal control unit After controlling the signal, the polarity signal control unit will reverse the polarity of the originally output polarity inversion control signal and then output it, otherwise the polarity of the original output polarity inversion control signal will be maintained. The positive and negative polarity inversion control unit controls the polarity of the output signal according to the received polarity inversion control signal, so as to avoid the problem of DC residual and eliminate the image sticking phenomenon.