隨著政府近年來大力推進節能減碳政策的實施，現代人環保意識提高，使人們更加認識到節能的重要性與迫切性。各類照明佔總用電量的三分之一，因此如何從照明方面節約能源，已成為地球村所關心的議題。傳統的白熾燈因使用壽命短、發光效率低，不符合環保提倡之訴求，近年來利用發光二極體 (Light Emitting Diode- LED)，來當作替換白熾燈、鹵素燈已成為時代的潮流。因 LED 具有壽命長、體積小、亮暗反應速度快、環保無使用汞和水銀材料，發光效率高等優點，但由於 LED 的亮度取決於順向導通電流，因此供應一恆定電流為 LED 驅動電路首要的課題。 一般家用調光型燈具的光源以燈泡為大宗，只需要搭配調光器即可。而日光燈源包含省電燈泡則無法調光，如果不考慮成本做出搭配的調光器，其調光範圍只有 20％，不敷日常生活所需；調光型 LED 燈具可以利用 RGB 的方式設計出不但可調光，同時也可以調色的應用，這是完全不同於傳統燈具的新式應用，此外LED 可調光源不僅僅適用在居家照明，更可以用在醫療方面；光線治療為藉由調整不同波長的光源照明以達到醫療的效果，此方法在西方國家已被廣泛的運用在改善睡眠及情緒的問題。本研究之 LED 驅動和調光控制 IC，電源電壓為 3.3V，輸出電流在溫度-25 ℃ 至100 ℃ 之間時，其輸出電流值隨溫度偏移率不超過3%，調光控制端；自動控制藉由溫度感測器傳送電流，以控制輸出電流隨溫度變化而調整光源，使光源在不同溫度下皆讓人感受舒適，手動控制端藉由抗雜訊電路使電路能依照個人喜好調整光源，滿足客製化的需求，使用 CIC 所提供之 TSMC 0.35μm 2P4M 3.3/5V CMOS 製程，晶片面積為 1.1 × 1.1 mm 2 ，其總消耗功率為 0.48W。

Nowadays, people raise the conscious of environmental protection in recent years. As a third of the total electricity consumption of all kinds of lighting, it’s a bigger problem that we needs to save energy. In recent years, the use of light-emitting diode (Light Emitting Diode- LED) have replaced the incandescent lamps and halogen lamps because the traditional incandescent bulb has short life of its usage and low luminous efficiency which do not meet the needs of energy saving policy. LED is environmental friendly without mercury materials and luminous efficiency. But the brightness of LED depends on the forward current, thus, the supplication of constant current becomes the most important topic of LED driving circuit. Normally the household light of dimming mainly use the bulbs and it only need to match the dimmer. However, it is not the fluorescent lamp. The dimmable LED can also adjust color via RGB lighting. Furthermore, LED extensively use in household lighting and medical usage. In the research, the power supply Vdd is 3.3V, the change of output current lower 3% when the temperature is -25 ℃ to 100 ℃. In the dimming control; the auto control can deliver the current via temperature sensor so as to control the output current which make people feel comfortable. Manual control can adjust the light by the users via low dropout liner regulator to meet the customers’ needs. It is fabricated with CIC provided by TSMC 0.35μm 2P4M 3.3V/5V CMOS process in an active area of 1.1 × 1.1 mm 2 . The total power dissipation is 0.48W.

目錄
論文審定書 .................................................................................................... i
誌謝 ............................................................................................................... ii
摘要 .............................................................................................................. iii
Abstract ........................................................................................................ iv
目錄 ............................................................................................................... v
圖目錄 ........................................................................................................ viii
表目錄 .......................................................................................................... xi
第一章 緒論 ................................................................................................. 1
1.1 研究背景 .................................................................................. 1
1.2 LED 驅動 IC 發展 ................................................................... 2
1.3 LED 調光 IC 發展 ................................................................. 18
1.4 研究動機 ................................................................................ 24
1.5 論文大綱 ................................................................................ 25
第二章 LED 之發光原理與整體架構簡介 .............................................. 26
2.1 LED 發光二極體 ................................................................... 26
2.1.1 概述 ................................................................................. 26
2.1.2 LED 的演變 ..................................................................... 27
2.1.3 LED 動作原理 ................................................................. 28
2.2 光與色彩 ................................................................................ 30
2.2.1 光之簡介 ......................................................................... 30
2.2.2 CIE 色度座標圖 .............................................................. 31
2.3 LED 之陣列結構 ................................................................... 32
2.3.1 LED 並聯陣列 ................................................................. 32
2.3.2 LED 串聯陣列 ................................................................. 33
2.3.3 LED 混聯陣列 ................................................................. 34
2.3.4 LED 交叉陣列 ................................................................. 34
2.4 LED 調光原理 ....................................................................... 35
2.4.1 調光器調光 ..................................................................... 35
2.4.2 類比調光 ......................................................................... 36
2.4.3 脈波寬度調變 ................................................................. 36
2.5 LED 驅動電路分析 ............................................................... 37
2.5.1 LED 驅動電路之基本需求 ............................................ 37
2.5.2 LED 驅動電路之分類及簡介 ........................................ 37
2.5.3 LED 驅動電路特性介紹和比較 .................................... 43
2.6 LED 驅動及調光 IC 架構理論 ............................................. 46
2.6.1 本研究之電路架構簡介 ................................................. 46
第三章 電路設計架構 ............................................................................... 48
3.1 溫度補償電路 (Temperature Compensation Circuit) ........... 48
3.2 電壓轉換電流調節電路 (V to I converters) ........................ 52
3.3 手動調變電路 (Manual control - LDO) ............................... 53
3.4 自動調變電路 (Auto control) ............................................... 58
3.5 過熱保護電路 (Overheat Protection Circuit - OTP) ............ 59
第四章 模擬結果與討論 ........................................................................... 61
4.1 溫度補償電路 (TPC) ............................................................ 61
4.2 電壓轉換電流調節電路 (V to I) .......................................... 63
4.3 手動調變電路 (Manual control - LDO) ............................... 65
4.4 自動調變電路 (Auto control) ............................................... 68
4.5 過熱保護電路 (OTP) ............................................................ 70
4.6 本研究之電路驗證結果和相關參考文獻比較 .................... 71
第五章 結果討論與未來展望 ................................................................... 73
5.1 結果討論 ................................................................................ 73
5.2 未來展望 ................................................................................ 74
參考文獻 ..................................................................................................... 75
Published ..................................................................................................... 81

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