45results about How to "Reduce current difference" patented technology

The invention relates to a dynamic loss reduction method for a distribution network and a synthesized loss reduction system of a distribution network. A principle that an electric field and a magnetic field are mutually symbiotic and affected is applied for dynamically realizing electromagnetic balance; the treatment of'peak load shifting'is carried out on the current difference value between three-phase unbalanced currents caused by the dynamic unbalance of the power used by a three-phase load at the secondary side of a distribution transformer so as to lead the current difference value to approach balance, reduce a zero sequence current and the unbalance degree of the three phases, and restrain a harmonic, thereby realizing the self loss (loss on transmission) of the distribution transformer and the line loss (the copper loss of the line) at the first side and the secondary side of the distribution transformer; the synthesized loss reduction system of the distribution network realizes the synthesized loss reduction management of the distribution network, the loss on transmission of the distribution transformer as well as the automatic measuring and accounting on the data of the copper loss of the line at the first side and the secondary side thereof; the system also realizes the remote automatic collection on the power data of the distribution transformer in the same time as well as the accounting of the line loss of a distribution line, calculates and accounts the line loss of the distribution network, calculates and analyzes the loss reduction as well as analyzes the benefits of energy saving and emission reduction.

The invention discloses a display and a display panel. A VDD wire is added in a special-shaped display area and the VDD wire is connected with pixels in the special-shaped display area through a plurality of breakover wires, so that benefit is brought to the design of narrow frames and the split screen risk caused by relatively large impedance is avoided.

The embodiment of the invention discloses a method, device and system for flow equalization, and relates to the field of electronics. Through the use of the method, device and system, flow equalization of which the volume, the cost and the extra loss are not increased is realized. The technical scheme adopted by the method comprises the following steps: through sampling, obtaining a present current value of a passage of each switching device in N switching devices which are connected in parallel; regulating a conduction angle of the switching device of which the present current value is greater than or equal to a first preset threshold value to a theta-alpha degree, wherein theta is the present conduction angle of the switching device of which the present current value is greater than or equal to the first preset threshold value, and alpha is greater than 0. The method, device and system disclosed by the invention are used for the flow equalization of the switching devices.

The invention discloses a driving method and device of a display panel. The display panel comprises a pixel circuit. The method comprises the following steps: setting a first initialization voltage according to a display brightness value; and providing a first initialization voltage to the pixel circuit, and initializing a light emitting module in the pixel circuit. The first initialization voltage is set according to the display brightness value, when the display brightness value is relatively low, the first initialization voltage is set to be relatively high, and in the light emitting stageof the pixel circuit, the leakage current of the driving current by providing the initialization voltage to a transistor of a light emitting device can be reduced, so that the leakage current phenomenon in the pixel circuit can be reduced, the current difference, caused by the leakage current characteristic of the transistor, of the pixel circuit for driving the light emitting device to emit lightis reduced, and the brightness uniformity of the display panel is improved.

The invention provides a solar cell module and a manufacture method thereof, comprising: cutting a solar cell piece into a plurality of blocks; testing the electric properties of each block to obtainthe efficiency and the maximum working current of each block; grouping the plurality of bocks according to the efficiencies of the blocks and a plurality of predetermined efficiency intervals to obtain a plurality of first block groups; grouping a plurality of blocks in each first block group according to the maximum working currents of the blocks and a plurality of predetermined current intervalsto obtain a plurality of second block groups; and manufacturing a solar cell module by using blocks in the same second block group. The current difference between blocks in the same solar cell modulecan be reduced, thus not only reducing the luminance difference between the blocks and improving the luminance of the module, but also ensuring that the parameters of the electric properties of the blocks are highly matched, so as to reduce the packaging loss of the module and improve the power output of the module.

The embodiment of the invention discloses a backlight lamp panel, a backlight module and a display device. The backlight lamp panel comprises a substrate and a light-emitting unit. The substrate is provided with a control circuit, a first power signal line and a second power signal line. The light-emitting unit comprises a plurality of sub light-emitting units, each sub light-emitting unit comprises a light-emitting device, a first control switch and a voltage dividing element which are connected in series between the first power supply signal line and the second power supply signal line, and the control circuit is electrically connected with the first control switches to control the first control switches to be switched on or switched off. The resistance values of the voltage dividing elements of the sub light-emitting units are gradually reduced in the direction from the input end to the output end of the first power signal line. The resistance values of the voltage dividing elements of the sub light-emitting units are gradually reduced in the direction from the input end to the output end of the first power signal line, so that the difference of currents flowing through all the sub light-emitting units is reduced, and the uniformity of the overall light-emitting brightness of the backlight lamp panel is improved.

The invention provides an organic light-emitting device, and a method for improving brightness uniformity. The device and the method are used for solving the problem of non-uniform brightness of an OLED light-emitting device in the prior art. The device is composed of a light-emitting region and a non-light-emitting region, the light-emitting region comprises a substrate, a first electrode, a functional layer and a second electrode, and the first electrode, the functional layer and the second electrode are sequentially arranged on the substrate in a layered mode, and the first electrode and the second electrode are used for being connected with a power source. The non-light-emitting region comprises an auxiliary electrode which is arranged between the first electrode and the functional layer and electrically connected with the first electrode, and the path resistance Ra of the auxiliary electrode, the path resistance Rb from the injection point of the auxiliary electrode to the point,farthest away from the injection point, of the light-emitting region and the equivalent resistance ROLED of the electroluminescent device meet a preset relational expression. By designing a longitudinal resistor and combining a transverse path resistor for proportional adjustment, the brightness uniformity of a screen is improved, the process is simple, and industrial production is easy to realize.

The invention discloses a current equalization circuit and method, and an LDO power supply system. The current equalization circuit comprises N compensation modules, wherein the N compensation modulesand the N LDOs are in one-to-one correspondence. Each compensation module comprises a branch current sampling module, an average current sampling module and a feedback module, wherein the branch current sampling module is used for sampling current provided for a current consumption point by the LDO corresponding to the branch current sampling module so as to obtain branch sampled current; the average current sampling module is used for sampling average current provided for the current consumption point by each LDO to obtain average sampled current; and the feedback module is used for comparing the branch sampled current with the average sampled current to obtain an error current, and feeding back the error current to the corresponding LDO. According to the current equalization circuit andmethod and the LDO power supply system provided by the invention, current equalization in power supply to the same network by multiple LDOs can be realized.

The invention provides a wafer electroplating device and electroplating method. The wafer electroplating device comprises an electroplating bath, an electroplating anode, a virtual anode and a power source. Electroplating liquid is arranged in the electroplating bath, a seed layer is arranged on the surface of a wafer, the electroplating anode comprises a first surface facing the seed layer, the seed layer comprises a second surface facing the electroplating anode, and at least part of the first surface and at least part of the second surface are immersed in the electroplating liquid. The power source comprises a positive electrode and a negative electrode, the electroplating anode is connected to the positive electrode of the power source, the seed layer is connected to the negative electrode of the power source, the virtual anode is immersed in the electroplating liquid and located between the electroplating anode and the seed layer, the virtual anode can enable ions in the electroplating liquid to pass through, and the resistance of the virtual anode is larger than the sum of the resistance of the electroplating liquid and the resistance of the seed layer. The wafer electroplating device and electroplating method solve the technical problem that the thickness of an electroplated layer formed on the wafer through electroplating is not uniform.

The invention provides a display driving circuit and a driving method of the display driving circuit. A source electrode driving module of the display driving circuit inputs a first data signal to a first input end of a selection module and inputs a control signal to a control end of the selection module, and a reverse bias circuit inputs a second data signal to a second input end of the selection module; in the display time of the display frame period, the selection module outputs the first data signal to the display module, and the display module emits light normally, and in the non-display time of the display frame period, in the non-display frame period or in a shutdown state, the selection module outputs the second data signal to the display module, and a pixel circuit of the display module is in a reverse bias state; the driving transistors are quenched and tempered, the state of electrons is recovered, the aging of the driving transistors is delayed, the threshold voltage Vth characteristic of the driving transistors is compensated, the current difference between the driving transistors is reduced, and the display uniformity of the display module is improved.

The invention relates to an adaptive power adjusting device for FDS testing. After a control module obtains a turning frequency calculated according to an approximate equivalent capacitance value of atested sample measured under a power frequency, a control signal is outputted to a power module according to the turning frequency; and the power module is controlled to enable the amplitude of the output voltage to be a first type of voltage amplitude when the frequency of the output voltage is smaller than the turning frequency and to enable the amplitude of the output voltage to be a second type of voltage amplitude when the frequency of the output voltage is larger than or equal to the turning frequency, wherein the first type of voltage amplitude is larger than the second type of voltageamplitude. On the basis of combination of the turning frequency, the frequency and the amplitude of the output voltage of the power module are adjusted; the voltage peak value can be adjusted duringthe frequency sweeping process of the tested sample testing; the current difference between the low frequency band and the high frequency band is reduced; and the measurement accuracy is improved. Meanwhile, the power output of the whole frequency sweeping stage can be controlled by adjusting the output voltage, so that waveform distortion caused by exceeding of the rated output power of the device can be avoided.

The invention discloses an anti-electric shock intelligent electric control cabinet and a use method thereof. The anti-electric shock intelligent electric control cabinet comprises a cabinet body, a dry-type transformer is arranged in an inner cavity of the cabinet body, U-shaped plates are fixedly connected to the two sides of the bottom of the dry-type transformer, the bottoms of the U-shaped plates make contact with the bottom of the inner cavity of the cabinet body, a support is transversely and fixedly connected to the inner cavity of the cabinet body, and the support is located above thedry-type transformer. The invention has the advantages of remote monitoring and control, and shock resistance and intelligent heat dissipation, and is advantageous in that data is synchronized to begiven to operators, and real time monitoring by the operators is facilitated; and the invention solves the problems that the existing power distribution cabinet has simple structure, does not have thefunctions of remote monitoring and control, cannot timely inform operators after the circuit of the electrical component fails, cannot effectively synchronize each data parameter to the remote operators, is not beneficial to the operators to quickly take remedial operation, does not have the functions of anti-vibration and intelligent heat dissipation, and reduces the applicability of the electrical control cabinet.

The invention provides a power MOSFET packaging thermal resistance comparison device, which comprises an adjustable DC power source, a switch power supply, a constant current control panel, a double-channel point temperature meter, a power MOSFET and a heat radiator. The power MOSFET is arranged on the heat radiator; the constant current control panel accurately controls different power MOSFETs to work in an amplification area and ensures same power consumption; and the double-channel point temperature meter measures the temperature on the surface of the power MOSFET and the temperature of the heat radiator at the lower portion of the power MOSFET. Through the control function of the constant current control panel, the current passing through the power MOSFETs is allowed to be controlled accurately, thereby greatly reducing the current difference since different power MOSFETs have start voltage difference; and meanwhile, under the condition of same power consumption, the temperature on the surface of the power MOSFET and the temperature of the heat radiator at the lower portion of the power MOSFET are measured by the double-channel point temperature meter, and thus packaging thermal resistance of the different power MOSFETs can be compared accurately and quickly.

An embodiment of the invention provides an Ethernet power supply equipment interface circuit and Ethernet power supply equipment. The Ethernet power supply equipment interface circuit comprises a first MOS tube, a second MOS tube, a current balance module, a first network transformer and a socket, wherein the current balance module is used for balancing current between a data line pair of the socket and an idle line pair of the socket; the first MOS transistor is connected with a first network transformer, and the first network transformer is connected with two pairs of data line pairs of thesocket; a positive electrode of a center tap of the first network transformer is connected with a POE positive electrode port, and a negative electrode of the center tap of the first network transformer is connected with a first PSE negative electrode port; and the second MOS transistor is connected with the current balance module, and the current balance module is connected with the idle line pair of the socket. According to the Ethernet power supply equipment interface circuit, the balance of the current power of two channels is realized, the situation that the single-path output power of the PSE chip is too large is reduced, the service life of the PSE chip is prolonged, and the heating and damage situations caused by the fact that the current is too large by a single-path line are reduced.