2results about How to "Consistent impedance" patented technology

The invention relates to the technical field of motor control, in particular to a brushless motor electronic speed regulation circuit for an unmanned aerial vehicle and a control method of the brushless motor electronic speed regulation circuit. The brushless motor electronic speed regulation circuit comprises a printed circuit board, a power supply module and a grid driving module. The printed circuit board is provided with a plurality of wiring layers which are stacked, and comprises a first power supply layer and a second power supply layer which are adjacent to each other in the vertical direction and are overlapped and aligned, and an electrical control layer. The power supply module is arranged on the first power supply layer and the second power supply layer, the first power supply layer and the second power supply layer are electrically connected through a matrix via hole array, and the power supply module is used for being electrically connected with an external power supply and supplying power to a circuit after processing. The grid driving module is arranged on the electrical control layer, is powered by the power supply module and is used for outputting driving voltage to the brushless motor, large current transmission and balanced distribution of the multi-channel motor controller can be realized on a single printed circuit board, and electromagnetic interference of a power loop on a control signal is inhibited.

The invention provides a binding device and a binding method of a flexible display panel, and the device comprises a carrying platform which is provided with two bearing surfaces which are oppositely arranged; the first pressing head and the second pressing head are located on the two sides of the carrying table respectively, and the orthographic projection of the first pressing head and the orthographic projection of the second pressing head on the bearing face are at least partially overlapped; the carrying table can move in the direction perpendicular to the bearing face. When the binding device is used for pressing the binding areas of the flexible display panel, the first pressing head and the second pressing head are used for pressing the binding areas on the carrying table at the same time, and the carrying table is movable and does not influence force transmission, so that the pressure of the first pressing head and the pressure of the second pressing head are the same, and the pressure, time and temperature of the multiple binding areas are completely the same; therefore, the impedance of each binding area is ensured to be consistent, and the problem of split screen display is avoided.