7results about How to "Improve afterimage problem" patented technology

Disclosed is a liquid crystal composition. The liquid crystal composition includes liquid crystal molecules including at least one of a liquid crystal compound having an alkenyl group and a liquid crystal compound having an alkoxy group, and a first stabilizer including a compound having a structure represented by Formula 1:where n is 0 or 1; m is 0 or 1; k is 0 or 1; Z1, Z2, and Z3 are each independently a single bond, —C═C—, —OCO—, —COO—, —CF2O—, or a C1 to C5 alkylene group; X1, X2, X3, and X4 are each independently hydrogen or halogen; Y is hydrogen, an alkylene group, an alkoxy group, a hydroxyl group, —NHCOCH3, or ═O; and A and B are cyclic compounds.

The utility model provides a pixel circuit and a display device. The pixel circuit comprises a driving circuit, a first control circuit, a second control circuit and a first initialization circuit. The first control circuit controls the connection between the first node and the fourth node under the control of a first control signal; the second control circuit controls the fourth node to be communicated with the third node under the control of a second control signal; the first initialization circuit writes the first initial voltage into the fourth node under the control of the first initial control signal. The embodiment of the utility model provides a pixel circuit with a new structure, which can work normally under the condition that a GOA (Gate On Array) module arranged on an array substrate is not added, and can improve the hysteresis phenomenon of a driving transistor included in the driving circuit and the residual image.

The invention relates to a display panel and electronic equipment, the display panel comprises a substrate, a bottom shielding metal layer located on the substrate and a pixel circuit, the pixel circuit comprises a plurality of transistors, and at least part of the transistors are located on the bottom shielding metal layer; the bottom shielding metal layer comprises an alternating current signal access port, the alternating current signal access port is used for accessing a square wave alternating current signal, and the square wave alternating current signal is transmitted to the at least part of the transistors through the bottom shielding metal layer so as to perform coupling reset on channels of the at least part of the transistors. Square wave alternating current signals are added to the shielding metal layer through the alternating current signal access port, channel charge reset of a transistor arranged on the bottom shielding metal layer can be effectively promoted, and then the effect of effectively improving screen afterimage and screen switching color cast is achieved.

The invention relates to a pixel circuit, a driving method, a display panel and electronic equipment. The pixel circuit comprises a light-emitting element; the first transistor is provided with a back gate structure, the first transistor is coupled with the light-emitting element, and the first transistor is used for driving the light-emitting element to emit light; the second transistor is provided with a back gate structure, the first end of the second transistor is used for being coupled with a first signal line, the second end of the second transistor is coupled with the gate of the first transistor to form a first node, and the second transistor is used for initializing the gate of the first transistor; the third transistor is provided with a back gate structure, the first end of the third transistor is coupled with the first node, and the second end of the third transistor is coupled between the first transistor and the light-emitting element; wherein back gates formed by the back gate structures of the first transistor, the second transistor and the third transistor are all used for being coupled with a second signal line, and a second signal of the second signal line is used for resetting the first transistor, the second transistor and the third transistor.

The invention provides a display panel and a display device. Specifically, the display panel comprises a substrate layer, a first metal shielding layer, a second metal shielding layer and a driving layer, the first metal shielding layer, the second metal shielding layer and the driving layer are sequentially arranged on the substrate layer, and the first metal shielding layer is in conduction connection with the second metal shielding layer; wherein the driving layer comprises a first electrode layer; the second metal shielding layer is conducted and connected with the first electrode layer; the orthographic projection of the second metal shielding layer on the substrate layer and the orthographic projection of the first metal shielding layer on the substrate layer are at least partially overlapped and completely cover the substrate layer; the driving layer comprises a plurality of thin film transistors; the second metal shielding layer comprises a plurality of first shielding parts which are arranged at intervals; the orthographic projection of at least one thin film transistor on the substrate layer is located in the orthographic projection of the first shielding part on the substrate layer. According to the technical scheme, the influence of charges of the substrate layer on the thin film transistor is greatly reduced, and the technical effect of improving poor display such as residual images is achieved.

The invention relates to a pixel circuit, a driving method, a display panel and electronic equipment. The pixel circuit comprises a light-emitting element; the first transistor is provided with a back gate structure, the first transistor is coupled with the light-emitting element, and the first transistor is used for driving the light-emitting element to emit light; wherein a back gate formed by the back gate structure of the first transistor is used for being coupled with a first signal line, and a first signal of the first signal line is used for resetting the first transistor through the back gate of the first transistor. When the first transistor is reset by the first signal through the back gate, the charges captured by the trap state in the channel of the first transistor can be quickly released. The fast release of the charge reduces the hysteresis of the first transistor, and improves the problems of residual image and flicker of the display panel, thereby improving the image display effect.

In order to improve the AMOLED display quality, the application solves the residual image problem by using a polyimide material. The application discloses a polyimide precursor prepared from diamine monomers and dianhydride monomers. The application introduces 0.1-6 mol% fluorine-containing diamine monomers into the diamine monomers and 0-4 mol% fluorine-containing dianhydride monomers into the dianhydride monomers to reduce the dielectric constant of the polyimide precursor after curing. Meanwhile, the application discloses a preparation method of the polyimide precursor. The method controls the water content of the reaction system to perform high-temperature hydrolysis reaction, so as to control the proportion of the amine group as the end and the carboxyl group as the end, thereby achieving the effect of adjusting the viscosity of the polyimide precursor slurry. In the case of combining the fluorine-containing reaction raw materials and the high-temperature hydrolysis reaction, the viscosity of the polyimide precursor slurry is more controllable, the dielectric constant of the polyimide film is lower, and the expansion coefficient is smaller, thereby achieving a better effect of improving the residual image.