本研究設計與實現一類數位多通道調光系統，以達到且便於調控LED (Light Emitting Diode)多階解析度之目的。
數位多通道(Digital Multiplex 512)採用非同步串列通訊傳遞，其傳輸的鮑率(Baudrate)為250Kbps，每組Frame有8個資料位元來決定動作，故可提供0至255的數值來描述各種不同的情境控制，所以每一組燈源具有256種顏色強度。此實驗規劃三組燈源(R、G、B各一組)，同時可共同混合出256×256×256=16,777,216種顏色。
本研究利用液晶面板做為顯示資料及訊息狀態，而按鍵則規劃為選單切換、強度調整及功能選擇，選單內可以多種選擇R、G、B不同的燈源，並適時調整工作週期(Duty Cycle)，可從1%到100%的範圍做變化，改變燈源的強度。本研究也可利用三組模擬類比轉數位的旋鈕，進行R、G、B燈源控制。除此之外，採用兩種不同廠牌之降壓式直流轉直流高效率電源驅動IC，來做定電流輸出控制，以避免輸出過載所造成之電路損壞。
LED矩陣電路板中，設計3串並聯短路裝置，避免因LED損壞，導致整串LED無法工作。在未來相關的延伸研究，可利用本系統的閘極驅動電路及矩陣式電路做為基礎架構。
本研究的實作與驗證說明了本研究設計概念的可行性。

In this study, we design and implement a class of digital multi-channel dimming systems to achieve the goal of convenienty regulating the change of multi-stage resolution in LED (Light Emitting Diode).
The digital multi-channel (Digital Multiplex 512) adopts asynchronous serial communication, in which the baudrate is 250Kbps, and each frame has eight data bits to determine the action. Therefore, it can provide the values from 0 to 255 to describe various different situational control, and each group of light sources has 256 kinds of color strength. In this experiment, three groups of light sources (R, G, B) are planned, and then 256 × 256 × 256 = 16,777,216 kinds of color can be constituted.
In this proposed concept, an LED panel is applied to displaying the status of data and signals. The buttons are designed for the menu switch, intensity adjustment, and functional selection. By using the selection menu, one not only can diversely select different R, G, B, light sources, but also can timely adjust duty cycle changing from 1%-100% to change the intensity of light sources. The R, G, B, light source control also can be processed by three groups of knobs simulating A/D conversion. Moreover, two different types of buck DC-DC high-efficiency power driving ICs are adopted to do the constant current output control.
In the LED matrix board, we design the series and parallel short-circuit device to prevent three strings of LED from not working due to the damage of any LED. In the future, we can extend relative research based on the gate driving circuit and matrix circuit.
Finally, the implementation and verification demonstrate the feasibility of the proposed design concept.

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