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博碩士論文 etd-0720110-203438 詳細資訊
Title page for etd-0720110-203438
論文名稱
Title
用於影像品質提升之CSTN LCD 圖框調變器
CSTN LCD Frame Rate Controller For Image Quality Enhancement
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
57
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2010-07-06
繳交日期
Date of Submission
2010-07-20
關鍵字
Keywords
閃爍、波紋
Random Shift Algorithm, Frame rate control, Flicker, CASR, LFSR, Motion line, PRSG, CSTN
統計
Statistics
本論文已被瀏覽 5652 次,被下載 3
The thesis/dissertation has been browsed 5652 times, has been downloaded 3 times.
中文摘要
本論文針對用於顯示面板上的FRC (Frame Rate Control)控制,提出一種改良閃爍問題,架
構精簡,低功率,且可廣泛運用於各式面板上的改良FRC方法。
此設計主要可用於單色或彩色,以原本只能顯示8色的RGB三原色面板,能成功顯示32768
色,且完全沒有閃爍(Flicker)與波紋(Motion Line)問題。
此設計主要架構即是在原本單純的FRC方法中,針對每一個圖元(Pixel)設定一個位置數
值,此位置數值針對每一個圖元不能是有規則的,否則閃爍問題雖然可以解決,但伴隨而來的
是嚴重的波紋問題,這一樣會導致顯示效果不良。本論文提出ㄧ採用PRSG (Pseudo Random
Sequence Generator) 來產生位置數值,並加入每一個圖元,這樣在每一個圖框(Frame)裡,亮點
能被平均的分散在整個面板,就不會有閃爍與波紋問題。
Abstract
This thesis is mainly focused on FRC (Frame Rate Control) method which can be used for LCD
panels, where a new algorithm is proposed to improve the flicker problem. The proposed algorithm can
be implemented by simple digital circuits with low power consumption.
The proposed design can be applied in both mono- and color- STN panels. It can generate 32768
colors in a panel without any flicker and motion line problems, which can only allow 8 colors
originally.
The major contribution in this thesis is to add a location number to each pixel of the panel.Notably, the numbers for all the pixels can not be a regular pattern. Otherwise, the flicker problem is
resolved at the expense of a serious motion line issue. The consequence is poor display quality. To
resolve both the flicker and motion line problem, we propose to employ a PRSG (Pseudo Random
Sequence Generator) which generates a non-regular number sequence for all the pixels. Therefore, all
the ON pixels can be dispersed on the panel in all frames.
目次 Table of Contents
致謝 i
摘要 ii
Abstract iii
目錄 iv
圖目錄 vi
表目錄 viii
第一章 概論 1
1.1 研究背景 1
1.1.1 CSTN 面板現況與發展 1
1.1.2 Frame rate control 技術概論 3
1.2 研究動機 6
1.2.1 FRC 技術改良 6
1.3 論文大綱 7
第二章 RSA (Random Shift Algorithm) FRC方法與原理 8
2.1 簡介 8
2.2 電路架構 12
2.2.1 CSTN 面板佈局與時序圖 12
2.2.2 整體系統架構方塊圖 14
2.2.3 RSA FRC Generator架構 16
2.2.4 32x49 FRC Pattern (SR-3249) 區塊 20
2.2.5 PRSG (Pseudo Random Sequence Generator) 21
2.3 電路模擬與預計規格 25
2.3.1 RSA FRC演算法驗證 25
2.3.2 FPGA驗證CSTN面板顯示結果 25
第三章 晶片實作 31
3.1 晶片佈局 31
3.1.1 佈局平面圖 31
3.2 晶片量測 33
3.2.1 改良型FRC晶片量測 33
3.3 晶片實作量測之結論與討論 38
第四章 結論及成果 41
4.1 結論 41
4.1.1 改良型FRC 41
4.2 論文成果 41
參考文獻 42
參考文獻 References
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[2] J. Lei, and X. Zou, “Dynamic dithering algorithm and frame rate control technique for liquid crystal display controller,” in Proc. 5th International Conference on ASIC, vol. 2, pp.740-743, Oct. 2003.
[3] H. Shen, and J. Fan, “Efficient frame rate control algorithm and its implementation,” in Proc. First International Multi-Symposiums on Computer and Computational Sciences (IMSCCS '06), vol. 1, pp. 799- 802, Jun. 2006.
[4] PixTech The Field Emission Display Company, Producing Gray Scale On A Monochrome FED Using Frame Rate Control, Application Note G002, pp. 1-2, Aug. 1998.
[5] M. J. Bell, “An LCD column driver using a switch capacitor DAC,” IEEE Journal of Solid-State Circuits, vol. 40, no. 12, pp. 2756-2765, Dec. 2005.
[6] Emerging Display Technologies Corp., Data Sheet: ER0570A2NC6-ROHS, version 2, 2005.
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[8] Y.-H. Hsueh, and J.-D. Lee “Image improvement method for LCD frame rate controller,” in Proc. Symposiums on Consumer Electronics, 2008. ISCE 2008, pp. 1-4, May 2008.
[9] Y. Sun, H. Ma, Z. Zhang, and S.-T. Wu, “Reflective liquid-crystal display using an in-plane-switching super-twisted nematic cell,” Journal of Applied Physics, vol. 92, no. 4, pp. 1956-1959, May 2002.
[10] Sitronix, Data Sheet: ST7669 262K 132x162 Color Dot Matrix LCD Controller/Driver, ver1.3a, 2009.
[11] SOLOMON systech semiconductor technical, Data Sheet: SSD1789A 132RGB x 132 CSTN LCD Segment/Common COLOR Driver with Controller, Rev 1.0, July 2004.
[12] G. Derfel, and D. Krzyżański, “Influence of the surface tilt angle on the spatially periodic distortions in super-twisted nematic displays,” Journal of Applied Physics, vol. 95, no. 7, pp. 3535-3540, Aug. 2004.
[13] S. Komura, K. Kuwabara, O. Itou, K. Funahata, K. Kondo, T. Saito, Y. Nagashima, and K. Kubo, “An optical design for reflective color STN-LCDs,” in Proc. the 5th Asian Symposium on Information Display, ASID '99, pp. 37-40, Mar. 1999.
[14] Altera Corporation, “Altera Embedded Peripherals Handbook,” 2005.
[15] Altera Corporation, “On-Chip Memory Implementations Using Cyclone Memory Blocks,” Jan. 2007.
[16] H. Kawamoto, “The history of liquid-crystal displays,” in Proc. of the IEEE, vol. 90, no. 4, pp. 460-500, May 2002.
[17] Q. Yi, and J. Zhang, “The design and implementation of follower for CSTN-LCD driver,” International Conference on International Society for Eighteenth-Century Studies (ISECS) 2009, vol. 1, pp. 404-408, Aug. 2009.
[18] S.-T. Tang, and H.-S. Kwok, “Measurement of reflective liquid crystal displays,” Journal of Applied Physics, vol. 91, no. 11, pp. 8950-8954, June 2002.
[19] Z. Bojkovic, and A. Samcovic, “Variable frame rates control strategy based on human visual system,” International Conference on EUROCON 2005., vol. 1, pp.179-182, Oct. 2005.
[20] G. P. Crawford, “Liquid crystal displays,” IEEE Potentials, Vol. 17, no. 4, pp. 38-42, Oct. 1998.
[21] Altera Corporation, “Nios Development Board Reference Manual, Cyclone Edition,” Dec. 2004.
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