Abstract: Provided is a controller and a luminaire having the controller. The controller is provided in the luminaire, and may include a switch assembly provided on a side where a light outlet of the luminaire is located and configured to receive a selecting signal that is input from the outside, and a control board connected with the switch assembly and configured to generate a corresponding control signal on the basis of the selecting signal, so as to control a plurality of light sources of the luminaire to form at least two types of Correlated Color Temperatures (CCT), brightness and/or colors respectively. By the disclosure, the problem that it is hard for a user to adjust the CCT, the brightness and/or the color of the luminaire in the prior art is solved, and operating convenience of the user is improved.

Abstract: The present application relates to the technical field of semiconductors, and provides a gallium nitride (GaN)-based high electron mobility transistor epitaxial wafer and a preparation method therefor. The GaN-based high electron mobility transistor epitaxial wafer comprises a substrate, and a buffer layer, a high-resistance buffer layer, a channel layer, an AlGaN barrier layer, and a cap layer which are stacked on the substrate; the cap layer comprises first sublayers and second sublayers which are grown alternately; the first sublayers are GaN layers; the second sublayers are InGaN layers; both the first sublayers and the second sublayers are doped with a main doping element; the main doping element is at least one of Be and Mg; the second sublayers are further doped with an auxiliary doping element; the auxiliary doping element is at least one of O, Mg, Si and Zn.

Abstract: Provided is a controller and a luminaire having the controller. The controller is provided in the luminaire, and may include a switch assembly provided on a side where a light outlet of the luminaire is located and configured to receive a selecting signal that is input from the outside, and a control board connected with the switch assembly and configured to generate a corresponding control signal on the basis of the selecting signal, so as to control a plurality of light sources of the luminaire to form at least two types of Correlated Color Temperatures (CCT), brightness and/or colors respectively. By the disclosure, the problem that it is hard for a user to adjust the CCT, the brightness and/or the color of the luminaire in the prior art is solved, and operating convenience of the user is improved.

Abstract: The present application discloses a lamp, which comprises a housing, a radiator being provided with an accommodating space for accommodating a light source and a Printed Circuit Board (PCB) board, an optical device having a bottom surface facing towards the radiator and a top surface facing towards external space, and a switch being connected to the PCB board, wherein the optical device comprises an actuator which is cooperated with the switch, wherein the optical device is rotatably arranged relative to the radiator so that the switch is switched by the actuator. By means of such an arrangement, a user may manually rotate the optical device of the lamp to drive the switch located inside the lamp to be switched, so that the lamp is conveniently switched between different color temperatures, for example between cold light and warm light.

Abstract: The present application discloses a lamp, which comprises a housing, a radiator being provided with an accommodating space for accommodating a light source and a Printed Circuit Board (PCB) board, an optical device having a bottom surface facing towards the radiator and a top surface facing towards external space, and a switch being connected to the PCB board, wherein the optical device comprises an actuator which is cooperated with the switch, wherein the optical device is rotatably arranged relative to the radiator so that the switch is switched by the actuator. By means of such an arrangement, a user may manually rotate the optical device of the lamp to drive the switch located inside the lamp to be switched, so that the lamp is conveniently switched between different color temperatures, for example between cold light and warm light.

Abstract: An AlGaN template including a substrate and an Al1-xGaxN crystallization thin film deposited on the substrate, where 0<x<1. A method for preparing the AlGaN template includes providing a substrate; and depositing an Al1-xGaxN crystallization thin film on the substrate.

Abstract: An AlGaN template including a substrate and an Al1-xGaxN crystallization thin film deposited on the substrate, where 0<x<1. A method for preparing the AlGaN template includes providing a substrate; and depositing an Al1-xGaxN crystallization thin film on the substrate.