自適應複合式感測調光器模組之應用研究

本論文針對調光器的多方應用，使用微控制器(microcontroller , MCU)整合環境光感測器(ambient light sensor)及雷射飛時測距技術(laser time-of-flight , LTF)，設計出自適應複合式感測調光器模組，利用環境光感測器偵測目前的環境光照度，並即時回授給控制單元，由控制單元對燈光進行控制。另外也為因應各個使用者的亮度適應問題，系統能夠對現有輸出的亮度進行多段微調，使其達到最適合使用者的亮度。雷射飛時測距使用在對於使用者的偵測，藉由飛時測距技術判斷使用者位置與模組的距離，並回授給主控制單元進行判別並執行相關動作。總結，調光方式選擇以最適合控制的脈波寬度調變(pulse-width modulation , PWM)進行調光，並整合以上主要技術來達到對使用者視力的保護及電力耗損的控制。本論文對自適應感測調光模組的應用做出動作原理的分析以及設計考量，並實現電路驗證，最後分別對數位望遠鏡顯示調光以及護眼檯燈的應用進行實驗與討論。

關鍵字

微控制器；環境光感測；飛時測距；調光器；脈波寬度調變

並列摘要

Focusing on multiple applications of dimmers, in this thesis, we use the microcontroller (MCU) to integrate the ambient light sensor and the laser time-of-flight (LTF) technology, to design and create an adaptive composite sensing dimmer. The light module can not only detect the current ambient illuminance by using the ambient light sensor, but also feedback to the control unit in real time, and then control the light via the control units. Moreover, the output brightness can be fine-tuned in multiple stages to make it have more suitable brightness for the users. In addition, the LTF ranging is used for the user detection so that the distance between the user's position and the module can be determined, and then fed back to the main control units for identifying which stage of the light module should be chosen, followed by executing all of the relative actions. In conclusions, the dimming method can select the most suitable pulse-width modulation(PWM) for dimming via integrating the above main technologies to protect the user's eyesight as well as control the electric power consumption. In this paper we present the principle for the application of the adaptive sensing dimming module with all design considerations, followed by executing the circuit implementation for verifications. Experiments and discussions are given on the applications for the cases of the digital telescope display dimming and the eye protection desk lamp.