32results about How to "Solve afterimage problem" patented technology

The invention discloses a pixel circuit and a driving method thereof as well as a display device. The pixel circuit comprises a data writing-in module, a first light emitting control module, a secondlight emitting control module, a threshold compensation module, an anode resetting module, a capacitor module, a driving transistor and a light emitting diode; in a resetting phase, an anode of the light emitting diode is reset by utilizing the anode resetting module; meanwhile, the second light emitting control module is used for controlling the anode of the light emitting diode to be conducted with a second electrode of the driving transistor; the threshold compensation module is used for controlling a grid electrode of the driving transistor to be conducted with a first electrode of the driving transistor, so that voltage of a first electrode of the driving transistor is discharged toward the direction of the anode resetting module until the driving transistor is in a cut-off state; thus grid source voltage of the driving transistor keeps a constant value and is not influenced by a signal/picture of the last time, so that the residual image problem is solved.

The invention relates to a CMOS image sensor comprising a transistor and a photodiode, wherein the transistor comprises a grid dielectric layer and a grid electrode which are arranged on the surface of an epitaxial film in sequence and side walls arranged at both sides of the grid dielectric layer and the grid electrode in sequence, a doping well arranged in the epitaxial film at one side of the grid electrode, heavy-doping regions arranged in doping wells arranged at one side of the grid electrode and one sides of the side walls, and a threshold voltage regulation region arranged in the epitaxial film below the grid electrode, wherein the doping well surrounds an adjacent isolating structure, and the threshold voltage regulation region is adjacent to the doping well. The photodiode comprises a heavy-doping region arranged in the epitaxial film and a light-doping region arranged in the epitaxial film, wherein the heavy-doping region is a distance away from the adjacent isolating structure, the depth of the heavy-doping region is larger than that of the threshold voltage regulation region, and the heavy-doping region and the threshold voltage regulation region are partially overlapped; the conduction type of the light-doping region is opposite to that of the heavy-doping region, the depth of the light-doping region is smaller than that of the heavy-doping region and the light-doping region is adjacent to the isolating structure and the threshold voltage regulation region. The invention reduces the residual image of the image sensor, is suitable for the manufacture process of submicron layer, and has smaller drain current and simple manufacture process.

An embodiment of the invention provides a method and a device for determining driving voltages. The method includes determining an average value of a driving high voltage and a driving low voltage of each gray level according to a TFT-LCD (thin film transistor-liquid crystal display) pixel electrode jumping voltage of the gray level when a driving high voltage and a driving low voltage of a TFT-LCD are set; setting the driving high voltage and the driving low voltage of the TFT-LCD according to a relation curve of the average value of each gray level, a driving voltage of a source driving integrated circuit and the light transmittance of the TFT-LCD and a gamma curve of the TFT-LCD. The method and the device have the advantages that as an average value of the driving high voltage and the driving low voltage is determined according to the TFT-LCD pixel electrode jumping voltages, a phenomenon that driving voltages are asymmetrical due to the fact that a corresponding pixel electrode jumping voltage is different from the difference between an average value of a driving high voltage and a driving low voltage of each gray level and a reference voltage Vcom of an existing TFT-LCD is prevented, and the problem of residual images due to deviation of the pixel electrode jumping voltages of the existing TFT-LCD is solved.

The invention relates to the technical field of liquid crystal displaying and discloses a display substrate, a manufacturing method of the display substrate and a liquid crystal display panel. An ion barrier structure is arranged in a non-display area of the display substrate and used for preventing charged ions in the non-display area from being diffused to a display area, accordingly the problem that residual images are produced on the periphery of the display area can be effectively solved, and the display quality of a liquid crystal display device is improved.

The application provides a display panel and a touch display device. Since a conductive layer covered by a black matrix layer is provided in the display panel and the conductive layer is electricallyconnected to a common electrode or a ground line to derive charges of ions accumulated in the color filter substrate, the afterimage problem during the display of the display panel and the touch display device is avoided. In addition, the conductive layer located in the display panel can reduce the influence on the touch performance of the touch display device.

The invention discloses a pixel circuit, a driving method thereof, a display panel and a display device. The pixel circuit comprises a data writing module, a switch control module, a reset module, a light-emitting control module, a first light-emitting device, a second light-emitting device and a driving control module. The first light-emitting device and the second light-emitting device are arranged, a second electrode of the first light-emitting device is coupled to a first electrode of the second light-emitting device, and a first electrode of the first light-emitting device is coupled to asecond electrode of the second light-emitting device. Through cooperation of the data writing module, the switch control module, the reset module, the light-emitting control module and the driving control module, time-sharing display of the first light-emitting device and the second light-emitting device can be controlled, and long-time static display can be avoided, so that the residual image problem of the OLED display is avoided, the display life of the OLED display is prolonged, and the display performance of the OLED display is improved.

The invention discloses a display panel, a driving method thereof and a display device. The display panel comprises a plurality of columns of data lines, a plurality of rows of scanning lines, a plurality of pixel active switches, a pixel electrode, a plurality of reset circuits and a common electrode. The plurality of reset circuits and the plurality of pixel areas are arranged in a one-to-one correspondence manner, and the reset circuits are connected with the pixel electrodes; wherein the difference between the voltage value of the reset data signal and the voltage value of the common voltage signal is the offset value of the reset data signal; wherein the difference between the voltage value of the data signal and the voltage value of the common voltage signal is a data signal offset value; if the data signal offset value is an interval from zero to a positive value; the offset value of the reset data signal is any fixed value in a range from zero to a negative value; if the data signal offset value is an interval from zero to a negative value; the offset value of the reset data signal is any fixed value in a range from zero to a positive value. The problem that residual images are easily caused by positive and negative changes of voltage on a data line is solved.

The invention discloses a compound, a liquid crystal composition and a liquid crystal display device. The structural formula of the compound is shown as a formula I. The liquid crystal composition comprises one or more compounds shown as the formula I, one or more compounds shown as the formula II and one or more compounds shown as the formula III. The liquid crystal display component comprises the liquid crystal composition. The liquid crystal composition provided by the invention has high diffusivity, shortens the first-stage light irradiation time from 75-100s to 50-65s, reduces residual images caused by uneven diffusion, has high conversion rate, and can realize quick response; the liquid crystal display component has the characteristics of wider nematic phase temperature range, properor higher birefringence anisotropy delta n, high RM conversion rate and less residue, can effectively avoid the residual image problem, can shorten the preparation process, and improves the production efficiency.

The invention discloses a CMOS image sensor structure and a manufacturing method. The CMOS image sensor structure comprises a pixel unit array arranged on an SOI substrate and a peripheral circuit located around the pixel unit array, wherein the SOI substrate sequentially comprises a silicon substrate for a device, a buried oxide layer and a silicon substrate, and the pixel unit array comprises asilicon epitaxial layer arranged in the silicon substrate for the device, the buried oxide layer and the silicon substrate, and photosensitive parts of a plurality of pixel units arranged in the silicon epitaxial layer. According to the invention, a high-performance SOI device is still used in the peripheral circuit of an image sensor, and the high-performance pixel unit structure is manufacturedat the same time.

The invention discloses an array substrate and a manufacturing method thereof, a display panel and a display device. The array substrate comprises a substrate base plate, a color resistance layer, anorganic insulating film layer, a pixel electrode layer and a liquid crystal guide film layer, wherein the color resistance layer, the organic insulating film layer, the pixel electrode layer and the liquid crystal guide film layer are sequentially arranged on the substrate base plate. An ion barrier layer is further arranged between the organic insulating film layer and the liquid crystal guide film layer so as to prevent ions from reaching the liquid crystal guide film layer. By means of the mode, a problem of residual images of the panel can be avoided, and display quality is improved.

The invention relates to a compound represented by a formula I in the specification.

The embodiment of the invention provides a driving circuit and a display device, the driving circuit comprises an integrated power supply management circuit and a source electrode driving circuit, the source electrode driving circuit comprises a positive frame amplifier and a negative frame amplifier, the input end of the positive frame amplifier is connected with the integrated power supply management circuit, and the output end of the positive frame amplifier is used for outputting a positive polarity driving signal during positive frame driving; the input end of the negative frame amplifier is connected with the integrated power management circuit, and the output end of the negative frame amplifier is used for outputting a negative polarity driving signal during negative frame driving; and at least one of the positive frame amplifier and the negative frame amplifier is an adjustable amplifier with an adjustable voltage conversion rate, and the source electrode driving circuit is configured to improve or reduce the voltage conversion rate of the adjustable amplifier according to the charging difference of the positive frame driving and the negative frame driving. According to the design, the charging difference of positive frame driving and negative frame driving can be balanced by adjusting the voltage conversion rate of the adjustable amplifier, and the charging rates of positive and negative frames can be balanced even under the condition that the charging time is relatively short, so that the problem of generation of residual images can be avoided.

A liquid crystal display device comprises an array substrate, a color film substrate, and a liquid crystal layer between the array substrate and the color film substrate. The array substrate comprises a first transparent base, pixel electrodes, an insulating protective layer, first common electrodes and a first alignment layer; the pixel electrodes, the insulating protective layer, the first common electrodes and the first alignment layer are formed on the first transparent base; the pixel electrodes and the first common electrodes are electrically insulated by the insulating protective layer; the first common electrodes are arranged above the pixel electrodes; the first alignment layer is formed on the insulating protective layer and covers the first common electrodes. The color film substrate comprises a second transparent base, a shade array and second common electrodes; the shade array and the second common electrodes are formed on the second transparent base. The insulating protective layer is provided with through holes corresponding to the shade array; the through holes penetrate the insulating protective layer and allow the pixel electrodes to be exposed; the first alignment layer fills the through holes and contacts with the pixel electrodes.