Abstract: Provided are a communication control method, a communication master device, and a system in a local area network. The method includes: sending, every first preset duration, a broadcast search instruction to each slave device for a device search, whereby each slave device randomly generates a first timing time slice, and makes a response after timing of the first timing time slice ends; after the device search is completed, sending a broadcast access instruction to each slave device, whereby each slave device randomly generates a second timing time slice, and makes a response after timing of the second timing time slice ends; and after device access is completed, sending, by a master device, a synchronization instruction to each slave device, whereby each slave device randomly generates a third timing time slice, and makes a response after timing of the third timing time slice ends.

Abstract: A LED dimming method includes obtaining an illumination set according to a preset dimming curve and an initial dimming grayscale set; obtaining an excitation signal set comprising a voltage signal set or a current signal set according to the illumination set; obtaining a measured illumination curve according to the excitation signal set and the initial dimming grayscale set; collecting a subdivision dimming grayscale set according to the measured illumination curve and the preset dimming curve, so that a dimming curve corresponding to the subdivided dimming grayscale set and the illumination set coincides with the preset dimming curve; and adjusting the excitation signal set according to the subdivision dimming grayscale set. The method can achieve an ideal and undistorted optical curve effect to meet the demands of the user, and therefore achieving an efficient and accurate dimming.

Abstract: A LED dimming method includes obtaining an illumination set according to a preset dimming curve and an initial dimming grayscale set; obtaining an excitation signal set comprising a voltage signal set or a current signal set according to the illumination set; obtaining a measured illumination curve according to the excitation signal set and the initial dimming grayscale set; collecting a subdivision dimming grayscale set according to the measured illumination curve and the preset dimming curve, so that a dimming curve corresponding to the subdivided dimming grayscale set and the illumination set coincides with the preset dimming curve; and adjusting the excitation signal set according to the subdivision dimming grayscale set. The method can achieve an ideal and undistorted optical curve effect to meet the demands of the user, and therefore achieving an efficient and accurate dimming.