應用動態部分可重組系統之LED模組控制器設計與實現

Design and Implementation of LED Module Controller Using Dynamic Partial Reconfigurable System

劉奕志(Yi-Chih Liu)

指導教授 ： 李宗演

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2010年)

https://doi.org/10.6841/NTUT.2010.00568

摘要

近年來隨著多媒體影像與資訊傳播的發展，節能減碳的意識持續高漲，帶動了LED設計的應用領域。廠商也陸續推出高亮度LED與高灰階LED驅動IC，更是讓大型顯示看板的市場逐年成長，由於高灰階色彩會增加控制器在模組影像處理的負擔。因此，提升LED模組控制器的驅動效能、影像模組的高掃描頻率與降低成本，是非常重要的研究課題。本文應用FPGA架構的動態部分可重組系統，設計一個在LED顯示模組控制器，搭配LED驅動IC的色差修正、高灰階以及故障偵測等即時功能，由高效能與平行處理的驅動能力擴大所能控制的LED模組範圍。並依顯示看板所需的規格整合局部模組驅動特性，且事先規劃各驅動模式為部分可重組區域的硬體內文儲存於外部記憶體，當系統提出單一驅動功能需求時，透過動態可重組功能配置硬體內文於部分可重組區域。由實驗結果顯示，本方法可減少38.58% 的硬體資源，提高了局部模組的掃描效率，擴大可控制局部LED模組的範圍，與傳統微處理器的驅動方式比較，可降低77.21% 成本。本設計的架構易擴展於不同規格之局部模組的驅動，將有助於縮短控制器開發時程。

關鍵字

灰階 ； 驅動 ； 控制器 ； FPGA ； 可重組

並列摘要

Since the conscious of energy saving and carbon reduction is rising, LED design applications has become more and more popular with the progress of multimedia video and information communication in recent years. Manufactures are now continuing promoting high-brightness LED and high-grayscale LED driver IC which already stimulated the LED display market. However, the high-grayscale color will also increase the controller’s loading during to process the image module. Therefore, how to improve the driving capability of controller platform, high-frequency scanner of video module and low-cost controller is really an important topic within the LED display system. In this paper, we design a LED module controller by applying the Dynamic Partial Reconfigurable（DPR）system of FPGA architecture which collocates with the real-time tasks, such as high-grayscale, LED open detection, and dot correction in driver IC. The driving capability has the feature of high-performance and parallel processing which can enlarge the controllable module range. When the system requests the single driving model, the hardware context will be dynamically reconfigured in the partial area. The experimental results show that the proposed methods can reduce the hardware resource in 38.58%, which can also promote the scanner efficiency of module and enlarge the range of controllable local modules. Compared with the traditional microprocessor driving, our design can reduce the cost in 77.21% and easily enlarge the driving of local module in different specifications, which can also shorten the lead time of controller development.

並列關鍵字

Grayscale ； Driver ； Controller ； FPGA ； Reconfigurable

參考文獻

[7] W. Kurdthongmee, “Design and Implementation of an FPGA-based Multiple-Colour Led Display Board,” Microprocessors and Microsystems, vol. 29, Issue 7, pp. 327-336, Sept. 2005.

[8] Y. K. Lo, K. H. Wu, K. J. Pai, and H. J. Chiu, “Design and Implementation of RGB LED Drivers for LCD Backlight Modules,” IEEE Trans. on Industrial Electronics, vol. 56, Issue 12, pp. 4862-4871, Dec. 2009.

[10] www.mblock.com.tw, “16-Channel PWM-Embedded LED Driver,” REVISED V1.00, Mar. 2006.

[11] H. J. Shin, S .B. Woo, S. J. Shin, K. D. Kwack and T. W. Kim, “A Novel High Gray Scale Data Driver for Passive Matrix OLED Displays,” International Conference on Parallel and Distributed Computing, Applications and Technologies, pp. 836-839, Dec. 2005.

[19]www.xilinx.com, “Early Access Partial Reconfiguration User Guide,” UG208 (v1.2), Sept. 2008.