Optimal Temperature Compensation for Multiple Chip LEDs

碩士 === 國立臺灣科技大學 === 電子工程系 === 99 === In recent years, LED is widely used to replace the traditional lighting source due to the demands of energy efficiency and carbon-emission reduction with the advancement of semiconductor material technology. However, the white LED lighting is facing its bottlenec...

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Main Authors: Ju-chi Liang, 梁如齊
Other Authors: Neng-chung Hu
Format: Others
Language:zh-TW
Published: 2011
Online Access:http://ndltd.ncl.edu.tw/handle/yhhaqn
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spelling ndltd-TW-099NTUS54280622019-05-15T20:42:06Z http://ndltd.ncl.edu.tw/handle/yhhaqn Optimal Temperature Compensation for Multiple Chip LEDs 多色LED之最佳化溫度補償機制 Ju-chi Liang 梁如齊 碩士 國立臺灣科技大學 電子工程系 99 In recent years, LED is widely used to replace the traditional lighting source due to the demands of energy efficiency and carbon-emission reduction with the advancement of semiconductor material technology. However, the white LED lighting is facing its bottlenecks in terms of low CRI, brightness decay, and color shifting caused from the rising of junction temperature. In this research, to obtain the high color rendering index and the tunable illumination, multiple chip LEDs are used to construct the full spectrum lighting source. Unfortunately, the emitting characteristics of LED are easy to be interfered by variation of junction temperature. The increasing of LED junction temperature results in low efficiency, wavelength shifting, and lifetime degradation. In addition, it also produces color errors in light spectrum reconstruction. This thesis provides a color correcting method for multiple chip LEDs lighting source. The variance of temperature (ΔT) is used to calculate the reconstruction coefficient variance (ΔC) of multiple chip LEDs systems. Moreover, the most efficient temperature compensation is developed by using reconstruction coefficient variance (ΔC) for LED selection optimization. Neng-chung Hu Chin-han Wu 胡能忠 吳錦銓 2011 學位論文 ; thesis 56 zh-TW
collection NDLTD
language zh-TW
format Others
sources NDLTD
description 碩士 === 國立臺灣科技大學 === 電子工程系 === 99 === In recent years, LED is widely used to replace the traditional lighting source due to the demands of energy efficiency and carbon-emission reduction with the advancement of semiconductor material technology. However, the white LED lighting is facing its bottlenecks in terms of low CRI, brightness decay, and color shifting caused from the rising of junction temperature. In this research, to obtain the high color rendering index and the tunable illumination, multiple chip LEDs are used to construct the full spectrum lighting source. Unfortunately, the emitting characteristics of LED are easy to be interfered by variation of junction temperature. The increasing of LED junction temperature results in low efficiency, wavelength shifting, and lifetime degradation. In addition, it also produces color errors in light spectrum reconstruction. This thesis provides a color correcting method for multiple chip LEDs lighting source. The variance of temperature (ΔT) is used to calculate the reconstruction coefficient variance (ΔC) of multiple chip LEDs systems. Moreover, the most efficient temperature compensation is developed by using reconstruction coefficient variance (ΔC) for LED selection optimization.
author2 Neng-chung Hu
author_facet Neng-chung Hu
Ju-chi Liang
梁如齊
author Ju-chi Liang
梁如齊
spellingShingle Ju-chi Liang
梁如齊
Optimal Temperature Compensation for Multiple Chip LEDs
author_sort Ju-chi Liang
title Optimal Temperature Compensation for Multiple Chip LEDs
title_short Optimal Temperature Compensation for Multiple Chip LEDs
title_full Optimal Temperature Compensation for Multiple Chip LEDs
title_fullStr Optimal Temperature Compensation for Multiple Chip LEDs
title_full_unstemmed Optimal Temperature Compensation for Multiple Chip LEDs
title_sort optimal temperature compensation for multiple chip leds
publishDate 2011
url http://ndltd.ncl.edu.tw/handle/yhhaqn
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AT liángrúqí optimaltemperaturecompensationformultiplechipleds
AT juchiliang duōsèledzhīzuìjiāhuàwēndùbǔchángjīzhì
AT liángrúqí duōsèledzhīzuìjiāhuàwēndùbǔchángjīzhì
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