4results about How to "Improve Brightness Consistency" patented technology

The application discloses an energy-saving LED display screen with a reverse common cathode and a driving method thereof, and belongs to the technical field of LED display. The application aims at the problem that the single voltage power supply of the traditional common anode LED display screen leads to high power consumption and serious heat generation of the first display content LED, and adopts a reverse common cathode structure of dynamic anode voltage switching + cathode time-sharing gating: the ICND2018 row driving IC provides switchable double voltages for the common anode of the LED, outputs 2.6~2.8V low voltage when the first display content is displayed, and outputs 3.6~3.8V standard voltage when the second display content and the third display content are displayed; three pieces of ICND1065L16 channel constant current sink column driving IC are matched to independently control the three-color cathodes of the first display content, the second display content and the third display content, and precise power supply of color separation is realized. Under the premise of being fully compatible with the existing SMDTOP three-in-one common anode lamp beads, the first display content LED loop voltage difference is reduced from 1.8V to 0.8V, and the power consumption of the single first display content lamp is reduced by about 55%.

This application discloses a display panel and its driving method and display device, relating to the field of display technology. After the display panel enters a first display mode, the total duration H1 of the light emission control signal being at the enable level in the m light emission holding frames of the first screen refresh frame is set to be less than the total duration H2 of the light emission control signal being at the enable level in the m light emission holding frames of the second screen refresh frame, thereby reducing the light emission duration of the first screen refresh frame, and / or, the bias voltage signal DVH1 corresponding to the x-th light emission holding frame in the first screen refresh frame is set to be greater than the bias voltage signal DVH2 corresponding to the x-th light emission holding frame in the second screen refresh frame, thereby reducing the driving current of the driving transistor in the pixel circuit; thereby reducing the brightness of the first screen refresh frame, weakening the brightness jitter of the first screen refresh frame, improving the brightness consistency of the display panel in timing, and thus improving the display effect.

The application discloses a shift register unit and a control method thereof, a gate driving circuit and a display device. The shift register unit comprises an input circuit, a pull-up circuit, a first reset circuit and a second reset circuit. The input circuit transmits a signal at a second input end to a pull-up node under the control of an input signal at a first input end. The pull-up circuit outputs a clock signal at a clock signal end to an output end under the control of a potential at the pull-up node. The first reset circuit resets the pull-up node through a potential at a first power signal end under the control of a signal at a first reset end. The second reset circuit resets the pull-up node through the potential at the first power signal end under the control of a signal at a second reset end. An invalid level of the signals input at the first reset end and the second reset end is less than the potential input at the first power signal end. The embodiments provided in the application reset the pull-up node through the potential greater than the invalid level of the signals at the first reset end and the second reset end, thereby avoiding the output leakage jump.

The utility model relates to the field of direct-current LED lamps, in particular to an LED lamp power supply structure. A power supply structure of an LED lamp comprises a long-strip-shaped LED lamp panel and a power supply module. The LED lamp panel is provided with an inner positive electrode circuit, an inner negative electrode circuit and a plurality of LED lamp sets. The plurality of LED lamp groups are connected in parallel between the inner positive electrode circuit and the inner negative electrode circuit; the two ends of the inner positive electrode circuit are connected with outer positive electrode circuits used for being connected with a power source positive electrode. The two ends of the inner cathode line are connected with outer cathode lines used for being connected with the cathode of a power supply. The lengths of the two outer positive electrode circuits connected with the two ends of the inner positive electrode circuit are approximately equal; the lengths of the two outer negative electrode lines connected with the two ends of the inner negative electrode line are roughly equal; the two external positive electrode lines are connected to the positive electrode of the same power supply or the positive electrodes of two power supplies with the same voltage; and the two external cathode circuits are connected to the cathode of the same power supply or the cathodes of two power supplies with the same voltage. The beneficial effects of the utility model are that the LED light emitting is uniform, and the brightness consistency in the light distribution performance is high.