6results about How to "Reduce stress effects" patented technology

The utility model relates to the technical field of heat dissipation structures, in particular to a laminated mainboard heat dissipation structure of an intelligent watch, which comprises a watchcase, a main PCB (printed circuit board) arranged in the watchcase, an auxiliary PCB arranged in the watchcase and a substrate arranged in the watchcase and positioned between the main PCB and the auxiliary PCB. Liquid metal heat conduction layers are arranged on the contact faces of the base plate and the main PCB and the contact faces of the base plate and the auxiliary PCB respectively, the main PCB is electrically connected with the auxiliary PCB, a battery bin is arranged in the watchcase, the battery bin is arranged on the side of the main PCB and electrically connected with the main PCB, a mounting plate is fixedly connected into the watchcase, and the mounting plate is fixedly connected with the base plate. The utility model aims to provide the laminated mainboard heat dissipation structure of the intelligent watch, so as to solve the problem that the longitudinal space is not fully excavated due to the plane layout of a single-sided PCB (Printed Circuit Board).

A bypass diode for improving welding application of electric resistance welding is characterized in that the bypass diode is structurally connected with a chip through first solder paste, connected with the chip and a copper connecting piece in parallel through second solder paste and connected with the copper connecting piece through third solder paste from right to left, and the above structures are wrapped by a plastic package body; the third solder paste and the copper connecting piece are connected with the first copper frame, the second copper frame is arranged on the right side of the first solder paste, and the two copper frames are provided with a tin block boss, an electric resistance welding boss, an electric resistance welding groove, a tin block boss groove and a via hole. The bottom of the chip is connected with the second copper frame.

The application relates to a chip packaging structure, which comprises a packaging substrate and a chip. A first surface of the packaging substrate is provided with a chip mounting area and a stress buffering area surrounding the chip mounting area. The chip is located in the chip mounting area. At least one of the chip mounting area and the stress buffering area is provided with at least one buffering groove, which extends from the first surface to a second surface and at least partially penetrates the packaging substrate. The application can effectively reduce stress concentration of the chip by arranging the buffering groove on the packaging substrate, so as to reduce the stress influence on the chip during installation of a packaging cover, and improve the reliability and stability of the packaging structure.

The utility model provides a kind of unmanned aerial vehicle throwing device for emergency rescue, belong to unmanned aerial vehicle throwing device technical field, including the quick release module of unmanned aerial vehicle bottom setting, the throwing frame of quick release module bottom setting, the lower surface of quick release module is provided with support plate, support plate middle part is provided with throwing device, throwing device bottom is provided with limit ring groove, multiple receiving grooves are opened in limit ring groove, every receiving groove's adjacent side is provided with an opening, the upper portion of throwing frame is provided with connecting assembly, the surface of connecting disc is provided with one inserting block around, the utility model is connected by throwing device and connecting assembly, to make support block insert into limit slot, by pivot driving limit slot rotation, to make connecting disc connected with limit slot rotate, make inserting block fall into receiving groove, to make connecting disc can not be supported by the connection of electric lifting rod, to reduce the influence of motor and electric lifting rod received stress, improve the service life of its component.

The utility model relates to the technical field of curtain wall construction, and discloses a curtain wall supporting device which comprises a supporting seat, four connecting frames are integrally arranged on the supporting seat, turning parts are rotatably arranged in the connecting frames, connecting and fixing assemblies are rotatably arranged on the surfaces of the connecting frames in a sleeved mode, the ends of the connecting and fixing assemblies and the turning parts are installed, and the connecting frames are fixedly connected with the supporting seat. A connection claw is rotationally arranged on the turning piece and installed on the glass curtain wall. The curtain wall supporting device solves the problems that in the prior art, due to the fact that most structures of point type supporting devices are integrally-manufactured claw-shaped structures, when part of curtain walls generate slight radian along with the appearance design condition of a building, due to the limitation of the fixed structures of the supporting devices, the supporting devices are affected by a tiny included angle generated by installation deviation between the adjacent curtain walls, and the curtain walls cannot be supported. And in the supporting process, bending stress can be continuously generated on the fixed curtain wall, so that the curtain wall becomes fragile, and the situation that the curtain wall is prone to cracking under the pushing of wind power is avoided.

This application provides a display device and its driving method. The display device includes a display panel. The display panel includes a plurality of pixel units. Each pixel unit includes a first sub-pixel and at least one second sub-pixel. The first sub-pixel includes a first driving circuit and a first light-emitting diode. The first driving circuit includes a first pulse amplitude modulation control module, a first transistor, and a second transistor. The second sub-pixel includes a second driving circuit and a second light-emitting diode. The second driving circuit includes a second pulse amplitude modulation control module, a second pulse width modulation control module, a third transistor, and a fourth transistor. The technical solution of this application reduces the number of data signal lines, lowers the complexity of the driving circuit, improves color point stability and brightness uniformity, reduces transient current peaks, and improves the reliability of the display device.