8results about How to "Potential stability" patented technology

The invention relates to the field of liquid on-line monitoring, and provides an electrochemical sensor for measuring conductivity and dielectric constant of liquid, comprising: a probe comprising a first electrode plate, a second electrode plate and a third electrode plate which are successively arranged; the measuring circuit comprises an RC circuit, an amplifying circuit, a comparison circuit and a NOT gate circuit, the NOT gate circuit is used for obtaining a fourth voltage u4, the duration time of a high level in the fourth voltage u4 is first time t1, the duration time of a low level in the fourth voltage u4 is second time t2, and the first time t1 is a second time t2; the first time t1 and the second time t2 are used for determining the conductivity and the dielectric constant. The dielectric property is determined through accurate time measurement, the measurement technology and high time / bandwidth are integrated together, and very high precision and repeatability are achieved. Wherein the accuracy of the conductivity can reach piezemens / meter (pS / m), and the accuracy of the dielectric constant can reach 0.0001.

The invention discloses a driving backboard and a display panel, and belongs to the technical field of display. The driving backboard comprises a substrate, a plurality of pixel driving circuits located on one side of the substrate, a plurality of first data lines and a plurality of second data lines. The plurality of first pixel driving circuits in one column of pixel driving circuits are electrically connected with one first data line, and the plurality of second pixel driving circuits in one column of pixel driving circuits are electrically connected with one second data line. In the first direction, signal output points in the first pixel driving circuit and / or the second pixel driving circuit are distributed between the first data line and the second data line, and the minimum distance between the signal output points and the first data line and the minimum distance between the signal output points and the second data line are both larger than 0. Thus, the two data lines can provide data signals for different pixel driving circuits respectively, it is guaranteed that each pixel driving circuit has sufficient charging time, and the display effect is improved.

The application provides a shift register unit, a gate drive circuit, a display panel and a display device. The shift register unit comprises an input module configured to transmit an input signal to a first node; a first control module configured to transmit a first voltage signal to a second node and configured to transmit a second voltage signal to the second node; a second control module configured to transmit the first voltage signal to a third node and configured to transmit a first clock signal to the third node; an output module configured to transmit the first voltage signal to an output terminal and configured to transmit the second voltage signal to the output terminal; a first capacitor configured to stabilize the potential of the first node; a second capacitor configured to stabilize the potential of the second node; and a third capacitor configured to stabilize the potential of the third node. The shift register unit provided by the application can stabilize the output signal and improve the display effect of the display panel.

The invention discloses a gate drive circuit, a display panel and a display device. A level transmission module is used for outputting a level transmission signal, and an output module is used for outputting a gate control signal. A first output unit of the output module is communicated with a current path between a first output end and a first power supply end according to a second clock signal in a first time period, the cascade transmission module receives a starting signal according to the first clock signal in a second time period, and the first time period and the second time period are at least partially overlapped; the level transmission signal is used for sharing the load corresponding to the output end outputting the grid control signal, the requirement for the driving capacity of the output module is reduced, the layout size of the grid driving circuit is reduced, the potential of the first output end can be kept stable in the level change process of the level transmission signal, and the reliability of the grid driving circuit is improved. And the influence of residual charges, electric leakage and other factors on the gate control signal output by the first output end is reduced.

The present invention provides a reference electrode for testing a valve-regulated lead-acid battery, and a preparation method and application thereof. The reference electrode is provided with a filamentary exposed reference electrode body, which is composed of a silver wire and a silver sulfate film layer coated on the surface of the silver wire; the diameter of the silver wire is 0.5-2 mm, and the length of the silver wire coated by the silver sulfate film layer is 100-200 mm; the length of the silver wire is greater than the length of the silver wire coated by the silver sulfate film layer; the silver sulfate film layer is a silver sulfate film layer prepared by the following method: using the silver wire as a working electrode, a platinum electrode as an auxiliary electrode, and a saturated calomel electrode as a reference electrode; performing an anodic polarization treatment on the working electrode in a sulfuric acid solution to form a silver sulfate film layer on the surface of the silver wire; the sulfuric acid solution is concentrated sulfuric acid with a mass concentration of 95%-98%, and a polarization current density of 5-7 mA / cm 2 , the polarization time is 18-22s. This reference electrode can be stably applied to electrochemical testing of valve-regulated lead-acid batteries for a long time.

The invention discloses a display panel, pictures displayed by the display panel comprise a first display picture and a second display picture which are continuously displayed, and the display panel comprises a plurality of sub-pixels, a plurality of scanning lines, a plurality of data lines and a compensation module, the polarity of a first data voltage input to the sub-pixel by the data line in the display time period of the first display picture is opposite to the polarity of a second data voltage input to the sub-pixel by the data line in the display time period of the second display picture; the compensation module is electrically connected with one end of each data line, the compensation module is used for inputting a first compensation voltage to the sub-pixels in the blank period of the first display picture and inputting a second compensation voltage to the sub-pixels in the blank period of the second display picture, and the polarity of the first compensation voltage is the same as that of the first data voltage; the polarity of the second compensation voltage is the same as that of the second data voltage, the first compensation voltage is not zero, and the second compensation voltage is not zero, so that the problem of flicker of the display panel is relieved.

The invention discloses a chlorine-free compound electrolyte for improving the performance of a magnesium battery and a preparation method of the chlorine-free compound electrolyte, and belongs to the technical field of magnesium-air battery electrolytes. The chlorine-free compound electrolyte for improving the performance of the magnesium battery is a mixed solution of sodium sulfate, sodium carbonate, 2-methylimidazole and deionized water. Sodium sulfate is used for replacing sodium chloride for the first time to prevent chloride ions from accelerating magnesium corrosion, sodium carbonate reacts with a magnesium matrix to form a uniform thin magnesium carbonate layer, and 2-methylimidazole adsorbs the surface of positively charged magnesium through an electronegative large pi bond structure, nitrogen atoms and the like to compact a film layer. Through the synergistic effect of the three materials, loose and porous discharge products can be inhibited from being deposited on the surface of the anode, the utilization efficiency of the anode is greatly improved to 87%, and the discharge voltage is improved to-1.9 V. The discharge performance of the air battery is improved to the greatest extent by adjusting the ratio of the solvent to the solute; the prepared battery has the advantages of being environmentally friendly, convenient to operate, simple in preparation process and the like, and can be applied to remote electronic equipment.

The invention provides a pixel circuit, a driving method and a display device. The pixel circuit comprises a light-emitting element, a driving circuit, an on-off control circuit, a first energy storage circuit and a data write-in circuit. The on-off control circuit controls the connection or disconnection between the first node and the second node under the control of the on-off control signal; the first energy storage circuit is electrically connected with the second node and the write-in node; the data write circuit provides a data voltage to a write node under the control of a scan signal. According to the invention, the first node and the second node can be controlled to be disconnected through the on-off control circuit under the control of the on-off control signal in the light emitting stage, so that the potential of the first node is not influenced by the floating write-in node, the potential of the first node is stable, and the display uniformity is improved.