Αποτελέσματα Αναζήτησης
1 Φεβ 2024 · The junction temperature, drive current and case temperature of each LED obtained from the junction temperature prediction model are substituted into the luminous flux response surface model, and the error of Model II is within 5 % compared with the experimentally measured luminous flux.
8 Μαΐ 2024 · An increase in LED junction temperature can adversely affect luminous efficiency, underscoring the importance of its testing for semiconductor devices [17, 18]. Preserving LED performance necessitates maintaining the junction temperature at a reasonable level.
13 Ιαν 2021 · For this reason, the luminous flux of LED can be divided into “cold lumen” and “hot lumen”, which respectively represent the light output of LED at room temperature and a certain temperature. Generally, the relationship between LED luminous flux and junction temperature can be expressed by equation (1)
8 Μαΐ 2024 · In this review, we meticulously analyze and consolidate various techniques used for measuring the junction temperature of light-emitting diodes (LEDs) by examining recent advancements in the...
The research results show that in different lighting scenes involving time periods and weather conditions, the proposed method can dynamically adjust the lighting luminance in a long tunnel to...
17 Οκτ 2019 · The article presents results of simulation studies connected with the influence of construction and ambient factors that influence the value of junction temperature of exemplary LED panel sources.
15 Μαρ 2018 · Average differences between the modelled and the reference junction temperatures of three InGaN LED specimens of each lamp type with their standard deviations. The spectra were measured with direct currents of 205 mA for Master LED, 790 mA for PAR16, 380 mA for CL A60, and 370 mA for CL A80.
