7results about How to "Slow movement speed" patented technology

The invention discloses a light-emitting diode epitaxial wafer, a preparation method thereof and a light-emitting diode, and relates to the technical field of semiconductors. The light-emitting diode epitaxial wafer comprises a substrate, a buffer layer, an N-type semiconductor layer, a low-temperature stress release layer, a multi-quantum well light-emitting layer, an electron blocking layer and a P-type semiconductor layer. The multi-quantum well light-emitting layer comprises a first sub-layer, a second sub-layer, a third sub-layer and a fourth sub-layer which are stacked in sequence, and each of the first sub-layer, the second sub-layer, the third sub-layer and the fourth sub-layer comprises an InGaN quantum well layer and a GaN quantum barrier layer which are periodically and alternately stacked; an electron injection layer is inserted into at least one of the GaN quantum barrier layer of the first sub-layer, the GaN quantum barrier layer of the second sub-layer and the GaN quantum barrier layer of the third sub-layer; and a hole injection layer is inserted into the GaN quantum barrier layer of the fourth sub-layer. By implementing the invention, the electron hole matching degree of the multi-quantum well light-emitting layer can be improved, so that the luminous efficiency of the light-emitting diode is improved.

The invention relates to the technical field of photoelectricity, and discloses a light-emitting diode epitaxial wafer and a preparation method thereof, and an LED, the light-emitting diode epitaxial wafer comprises a substrate, and the substrate is sequentially provided with a buffer layer, a non-doped GaN layer, an N-type GaN layer, a stress release layer, a multi-quantum well layer, an electron blocking layer, and a P-type GaN layer; the multi-quantum well layer comprises a high-barrier multi-quantum well layer, a middle-barrier multi-quantum well layer, a low-barrier multi-quantum well layer and a low-barrier end multi-quantum well layer which are stacked in sequence. According to the light-emitting diode epitaxial wafer provided by the invention, the hole injection efficiency of the P-type semiconductor material can be improved, the phenomenon of insufficient hole concentration in the multi-quantum well layer is improved, and the matching degree of electron hole concentration in the multi-quantum well layer is improved, so that the radiation recombination efficiency in the multi-quantum well layer is improved, and the brightness and the lighting effect of an LED device are finally improved.

The present application relates to the field of cement, and in particular to a wiring harness cement and a preparation method thereof. The wiring harness cement, in parts by mass, comprises the following raw materials: 5 to 20 parts of high molecular weight polyisobutylene, 5 to 25 parts of functional polyisobutylene, 5 to 15 parts of silicone oil, 1 to 5 parts of functional resin, 0.2 to 1 part of antioxidant, 0.2 to 1 part of lubricant, 40 to 80 parts of filler, 3 to 10 parts of pigment, 0.01 to 0.4 parts of inhibitor, 0.1 to 0.8 parts of catalyst, and 8 to 15 parts of functional additive. The automotive wiring harness cement prepared in the present application not only retains good cement waterproofness, adhesion and thermal stability, but also can greatly increase the sealing, stickiness, operability and aging resistance of the cement during use on this basis, greatly reducing the oil seepage, stickiness and aging embrittlement of the cement during actual application, and has excellent application prospects in the automotive field.

The application discloses a self-adaptive GRG artistic modeling ceiling assembly structure and particularly relates to the technical field of house decoration, which comprises a GRG panel body, a keel frame, a self-adaptive assembly, a buffer assembly and a connecting assembly. The keel frame is detachably connected with a wall body through bolts, and the self-adaptive assembly is arranged on the keel frame. The buffer assembly is arranged in the self-adaptive assembly. The GRG panel body is connected with the self-adaptive assembly through the connecting assembly. The application has a reasonable structure design, can quickly fix the GRG panel, can self-adaptively adjust the installation of a curved ceiling, can improve the installation and adjustment capacity and efficiency of the GRG artistic modeling ceiling, can reduce the difficulty of fixing between two adjacent GRG panels, and can improve the installation stability of the GRG panel.

The invention relates to the technical field of PVC material preparation, in particular to a slush molding PVC skin preparation process based on a modified PVC material, which comprises the following steps: heating a slush molding mold, conveying a material box containing PVC slush molding powder to the lower part of the slush molding mold, and connecting and coupling the material box and the slush molding mold; turning over the coupled material box and slush molding mold for a plurality of times, separating the material box from the slush molding mold after the redundant PVC slush molding powder falls into the material box, cooling the slush molding mold, and demolding to output a finished product slush molding skin; determining the interval duration between the heating moment and the cooling moment based on the average roughness of the sampling area in the finished product slush molding skin; the first overturning speed of the slush molding mold is determined based on the proportion of the number of defective products in the slush molding skin of the finished product; and the second overturning speed is determined based on the maximum thickness difference quantity of the finished product slush molding skin. According to the invention, the preparation accuracy of the PVC material is improved.

The present invention discloses a surface cleaning device for building templates used in civil engineering, and relates to the technical field of building template cleaning. In order to improve the cleaning efficiency, the device specifically comprises a base and a cleaning part, wherein the cleaning part comprises: a guide column, which is fixed to the inner wall of a slide groove provided on the upper surface of the base by a pin, and the inner wall of the slide groove is movably connected with a slider; a spring 1, which is sleeved on the outer wall of the circumference of the guide column, and the two ends of the spring 1 are respectively fixed to the inner wall of one side of the slide groove and the outer wall of one side of the slider by a pin; a sleeve, which is fixed to the outer wall of the top of the slider by a pin. The present invention utilizes the gravity of the building template itself to control the movement of the conical pin during the downward movement, thereby releasing the limit on the mounting plate, and realizing the clamping and fixing of the building template. By providing a swing motor to drive the U-shaped support plate to swing, the building template is ensured to have no cleaning dead angles in both the horizontal and vertical directions during the cleaning process using a brush roller.