可延展的LED電子看板控制器設計和實作｜國立中央大學博碩士論文系統

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研究生：	歐俊良 Jan-liang Ou
論文名稱：	可延展的LED電子看板控制器設計和實作 Design and Implementation of Scalable LED Signage Controller
指導教授：	陳慶瀚 Ching-Han Chen
口試委員:
學位類別：	碩士 Master
系所名稱：	資訊電機學院 - 資訊工程學系 Department of Computer Science & Information Engineering
論文出版年：	2012
畢業學年度：	101
語文別：	中文
論文頁數：	56
中文關鍵詞：	數位電子看板、影像插補器控制器
外文關鍵詞：	Digital signage, image interpolator controller
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數位電子看板可播放生動動態影像，易於吸引人的目光，使得越來越多廣告
商利用數位電子看板來宣傳。在多數情況下，播放媒體內容的大小並非符合LED
電子看板解析度，因此需將輸入端的影像縮放至LED 電子看板正確畫面上。
本研究基於可擴充、可重組的電子看板系統設計需求，提出一個階層式、模
組化的控制器架構並採用PNN 影像插補器做為縮放的核心。利用此彈性可擴充
大型電子看板架構，可根據需求組成想要電子看板解析度。並藉由PNN 影像插
補器的平滑參數，可調整插補影像的銳利度和平滑度，對文字型的顯示內容其影
像放大顯示保有其最大銳利度，而照片(natural picture)放大影像考量鋸齒效應，改
用較大平滑度。以達到放大影像顯示最好的視覺感受。
最後實作整合 PNN 影像縮放器LED 電子看板顯示控制器，我們可以彈性組
成LED 電子看板的顯示大小，並達到即時影像縮放至電子看板正確畫面上，並
可視顯示需求調整影像的平滑銳利度，讓觀看者達到影像最好的視覺感受。

Digital signage can play vivid video and is easy to attract people. More and more
advertiser use digital signage to advertising. In many case, video content resolution
don’t fit LED digital signage resolution. So we have to enlarge the input video
resolution to fit LED digital signage resolution.
This paper base on extendable and reconfigurable LED digital signage design
requirements. We proposed hierarchical and modular controller architecture. And use
probabilistic neural network video interpolator to scale video resolution. Use this flexible
and extendable large digital signage architecture. We can combine any digital signage
resolution we need. Using smoothing parameter of probabilistic neural network
interpolator to adjust sharpness and smoothness of video frame. In order to the best visual
experience enlarge video frame. Text-based video content we should enlarge video frame
the shaper the better. Because sharp effect natural picture video frame should enlarge the
smoother the better.
Finally we implement PNN interpolator controller integrated into LED display
controller. We can flexibly combine signage resolution, and can real-time scale video
frame to signage. User can adjust sharpness and smoothness of video frame to the best
visual experience.

摘要 ................................................................................................................... I
Abstract ................................................................................................................. II
誌謝 ..................................................................................................................... III
目錄 ................................................................................................................. IV
圖目錄 ................................................................................................................. VI
表目錄 .............................................................................................................. VIII
第一章、緒論 ....................................................................................................... 1
1.1 研究動機 ................................................................................................ 1
1.2 論文架構 ................................................................................................. 2
第二章、LED 數位電子看板 ............................................................................... 3
2.1 LED 點矩陣顯示器 ................................................................................. 3
2.1.1 單色LED 模組 ............................................................................. 3
2.1.2 彩色LED 模組 ............................................................................ 4
2.2 LED 顯示原理與控制 ............................................................................. 5
2.2.1 LED 掃描顯示法 .......................................................................... 5
2.2.2 PWM 色彩控制 ............................................................................ 6
2.3 大尺寸LED 數位電子看板架構 ........................................................... 7
第三章、模組化LED 電子看板控制器設計 ...................................................... 9
3.1 LED 顯示單元電路模組設計 ................................................................. 9
3.2 顯示單元控制器架構設計 ................................................................... 17
3.3 顯示單元控制器實作 ........................................................................... 23
3.3.1 實驗平台 ................................................................................... 23
3.3.2 顯示單元控制器硬體設計 ....................................................... 25
V
3.3.3 控制器電路合成 ....................................................................... 30
3.3.4 實驗結果與討論 ....................................................................... 36
第四章、可延展的影像顯示控制器設計 ......................................................... 37
4.1 機率神經網路插補器 .......................................................................... 37
4.2 PNN 影像縮放器設計 .......................................................................... 42
4.3PNN 影像縮放器電路合成 ................................................................... 47
4.4 系統整合與實驗 ................................................................................... 52
第五章、結論與未來展望 ................................................................................. 53
5.1 結論 ...................................................................................................... 53
5.2 未來展望 .............................................................................................. 54
參考文獻 ............................................................................................................. 54
                                

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