Topological Thermocompensation for Light-Emitting Diode Linear Modules of Filament Lamps

Abstract

Results of theoretical and experimental investigations of the stationary thermal regime of linear modules of filament light-emitting diode lamps are presented. It is demonstrated that the concentrated heat sources (lightemitting diode crystals) placed on a substrate form a non-planar temperature profile that negatively affects the stability of light characteristics of the filament lamps. The concept of localization function is introduced for a one-dimensional non-uniform distribution of crystals along the substrate. It is proved that when placing point heat sources, there exists a certain dichotomy coefficient at which the crystal localization function provides the least curvature of the temperature profile at a characteristic point x. Experimental investigations demonstrate that the localization of crystals whose dichotomy coefficient differs from unity allows the order of curvature of the profile for the sample of light-emitting diode linear module to be decreased by an order of magnitude in comparison with samples possessing equidistant distribution of heat sources.