13results about How to "Improve Brightness Consistency" patented technology

The invention provides a display panel, a driving method thereof and a display device, relates to the technical field of display, and is used for improving the brightness consistency of the display panel. The first scanning driving unit is electrically connected with the first scanning control end of the first pixel driving circuit and the first scanning control end of the second pixel driving circuit. The working cycle of the pixel driving circuit comprises a data writing time period, and the data writing time period of the first pixel driving circuit is before the data writing time period of the second pixel driving circuit in the display time of one frame of picture; moreover, when the first pixel driving circuit and the second pixel driving circuit receive the same data voltage, the potential VN11 of a first node in the first pixel driving circuit is greater than the potential VN12 of a first node in the second pixel driving circuit after respective data writing periods.

The invention relates to a brightness compensation method and device of a display panel, computer equipment, a computer readable storage medium and a computer program product. The method comprises the steps that an initial image of a display panel is acquired, target pixel points in the initial image are determined, and the target pixel points are determined according to brightness values of the pixel points of the initial image; according to a difference value between the brightness value of the target pixel point and a preset brightness value, adjusting the brightness value of the target pixel point to obtain an intermediate image; and determining a target brightness value according to the brightness value of the pixel point of the intermediate image, and adjusting the display parameter of the pixel point of the display panel according to the target brightness value, so that the gray-scale value of the adjusted pixel point is matched with the target brightness value. The method can guarantee the compensation effect and improve the brightness consistency.

The invention provides a display panel, a driving method thereof and a display device, relates to the technical field of display, and is used for improving the brightness consistency of the display panel. The first scanning driving unit is electrically connected with the first scanning control end of the first pixel driving circuit and the first scanning control end of the second pixel driving circuit. The working cycle of the pixel driving circuit comprises a data writing time period, and the data writing time period of the first pixel driving circuit is before the data writing time period of the second pixel driving circuit in the display time of one frame of picture; moreover, when the first pixel driving circuit and the second pixel driving circuit receive the same data voltage, the potential VN11 of a first node in the first pixel driving circuit is greater than the potential VN12 of a first node in the second pixel driving circuit after respective data writing periods.

The invention discloses a display panel and a display device. The display panel comprises a first display area, a second display area and a first non-display area. In the first direction, the first non-display area is located on at least one side of the first display area, the first display area and the second display area are arranged in the second direction, and the first direction intersects with the second direction; the display panel comprises at least one first signal line and at least one row of first pixels which are located in a first display area; the first signal lines extend along a first direction, and the first signal lines are connected with one row of first pixels; the at least one second signal line and the at least one row of second pixels are located in the second display area; the second signal lines extend along the first direction, and the second signal lines are connected with one row of second pixels; the number of the first pixels arranged in the first direction is smaller than that of the second pixels arranged in the first direction; at least one compensation capacitor is located in the first non-display area and connected with the first signal line. The brightness difference of the display panel can be improved.

The invention discloses an LED frequency-explosion integrated circuit and a light supplementing device. The LED frequency-explosion integrated circuit comprises an AC-DC conversion power supply, a DC-DC boost power supply, an LED power supply switching circuit, an LED stroboscopic signal control and dimming control circuit, an LED explosion-flash signal control and dimming control circuit and a processor. The LED stroboflash is directly powered by the AC-DC conversion power supply, the LED explosion flash is powered by the DC-DC boost power supply, current control is carried out on the LED stroboflash and the explosion flash in different modes, the response time of the stroboflash and the explosion flash is only related to the signal processing time of the MCU and the operational amplifier and is irrelevant to the DC-DC boost power supply and the inductor, and the LED stroboflash and the explosion flash can be controlled by the DC-DC boost power supply. According to the utility model, the DC-DC boost power supply can realize large-current output only by using one chip power inductor and electrolysis, the response time is shorter than that of a control constant-current chip, the problems of poor adaptability, high cost and the like of the existing LED stroboflash and explosion flash light supplement lamp and a camera can be better solved, and the application requirements of different occasions are met.

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 invention provides a display panel, a driving method thereof and a display device, relates to the technical field of display, and is used for improving the brightness consistency of the display panel. The first scanning driving unit is electrically connected with the first scanning control end of the first pixel driving circuit and the first scanning control end of the second pixel driving circuit. The working cycle of the pixel driving circuit comprises a data writing time period, and the data writing time period of the first pixel driving circuit is before the data writing time period of the second pixel driving circuit in the display time of one frame of picture; moreover, when the first pixel driving circuit and the second pixel driving circuit receive the same data voltage, the potential VN11 of a first node in the first pixel driving circuit is greater than the potential VN12 of a first node in the second pixel driving circuit after respective data writing periods.

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 invention provides a display panel, a driving method thereof and a display device, relates to the technical field of display, and is used for improving the brightness consistency of the display panel. The first scanning driving unit is electrically connected with the first scanning control end of the first pixel driving circuit and the first scanning control end of the second pixel driving circuit. The working cycle of the pixel driving circuit comprises a data writing time period, and the data writing time period of the first pixel driving circuit is before the data writing time period of the second pixel driving circuit in the display time of one frame of picture; moreover, when the first pixel driving circuit and the second pixel driving circuit receive the same data voltage, the potential VN11 of a first node in the first pixel driving circuit is greater than the potential VN12 of a first node in the second pixel driving circuit after respective data writing periods.

The application provides a fisheye lens, which comprises first to eighth lenses and a protection glass in sequence along an optical axis from an object side to an image side, and a diaphragm is located between the fourth and fifth lenses; the first to third lenses all have negative refractive power, the object side surface is a convex surface, and the image side surface is a concave surface; the fourth and fifth lenses have positive refractive power and are biconvex; the sixth lens has negative refractive power, the object side surface is a concave surface, and the image side surface is a convex surface; the seventh lens has positive refractive power and is biconvex; the eighth lens has negative refractive power and is biconcave; all the lenses are glass spherical lenses; through specific refractive power arrangement, surface configuration, refractive index and Abbe number range limitation, a miniaturized structure with an optical total length less than 21 mm and an effective diameter of each lens less than phi 12 mm is realized, the MTF is greater than 0.6 in a 0.8 field of view at a spatial frequency of 83 lp / mm, the total field of view is greater than 0.45, the target surface height is greater than 4.6 mm to match a 1 / 2.4 inch sensor, the F-Theta distortion is less than 1%, and the relative luminance at the maximum field of view is greater than 55%.

The present invention discloses an LED flashing integrated circuit and fill light device, including an AC-DC conversion power supply, a DC-DC boost power supply, an LED power supply switching circuit, an LED strobe signal control and dimming control circuit, an LED flashing signal control and dimming control circuit, and a processor. In the present invention, the LED strobe is directly powered by the AC-DC conversion power supply, and the LED flashing is powered by the DC-DC boost power supply. At the same time, the LED strobe and flashing are controlled by current in different ways. The response time of the strobe and flashing is only related to the signal processing time of the MCU and the operational amplifier, and has nothing to do with the DC-DC boost power supply and the inductor. Therefore, the DC-DC boost power supply only needs to use a chip power inductor and electrolytic to achieve large current output, and the response time is faster than that of the control constant current chip. It can better solve the problems of poor compatibility of existing LED strobe and flashing fill lights with cameras and high cost, and meet the application requirements of different occasions.

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.