LCD面板上，每一個畫素都擁有一個捕取光訊號的感測器，主要是偵測周圍影像或某一特定光訊號作一些控制動作。這項研究主要是以 Hspice 模擬新的觸控式方法為目的, 我們使用CMOS光學感測器作為讀出的元素，並利用空間濾波器的觀念，將此空間濾波器所產生的訊號當作一個重要的係數，進而改進讀出電路效率。而進一步研究, 則可使用TFT陣列。
這份論文主要是瞄準開發一個高效率的方法，去使用背光光源來操控觸控式面板，針對LCD面板的光感測輸入功能作一個提升讀取性和降低雜訊的研究。在LCD面板上，通常是由CCFL或LED去產生一個均勻分佈的背光光源，本文針對這些背光光源發射時產生的不同頻率，利用一個空間濾波概念去產生一個重要參考係數，由於背光光源是一個固定發射的信號頻率，帶通濾波器可將這個頻率的信號突顯出來，亦即將其它外界頻率信號衰減，提高訊號雜訊比(SNR)，再經由雙重取樣器(CDS)去將畫素的固定雜訊消除。我們利用背光光源所發出的特定頻率，捕捉這一個固定的背光光源頻率,那麼我們將能在沒有光源的黑暗環境中繼續操控面板或手機。新的體驗將改變我們使用觸控式螢幕手機和面板的生活方式。接觸控制板的廣泛應用與新興技術，使得運用環境更寬廣，它將可作到體積小且更舒適的靈活操控，大大地增加了便利性。

In a LCD panel that has equipped with pixel photo sensors for image capture, the ambient light intensity detection is critical for the read-out circuit. In this study, for simulation purpose, we use CMOS optical sensors as detecting element and their spatial filtering signal as an indicating factor for improving the read-out circuit efficiency. In the further study, TFT array will be used for similar investigation.
This thesis aims at developing an efficient method for backlight light intensity detection in touch panel. By catching a fixed backlight light source frequency we can detect the touch on the panel even working in the dark. This new touch approach will change the way we use and control the mobile phones and panel. The detecting circuits for the touch panel are integrated directly onto the screen and this makes products lighter and smaller with added portability and convenience.

[1] P. R. Gray and R. G. Meyer, Analysis and Design of Analoi
Integrated Circuits.New York: Wiley, 1984.
[2] Z. Y. Chang and W. M. C. Sansen, Low-Noise Wide-Band Amplifiers
in Bipolar and CMOS Technologies. Boston, MA: Kluwer, 1991.
[3] Berthold Klaus Paul Horn,” Robot Vision”, The MIT Press,1990.
[4] E.A. Vittoz and X. Arreguit, ”Linear Networks Ba- sed on
Transistors”, Electronics Letters, Vol. 29, No. 3, pp. 297-299,February 1993.
[5] E.A. Vittoz, ”Pseudo-Resistive Networks and their Applications to
Analog Collective Computation”, Proc.MicroNeuro’97, pp. 163-173,
Dresden, 1997.
[6] M. Schanz, W. Brockherde, R. Hauschild, B.J. Hosticka and M.
Schwarz, ”Smart CMOS Image Sensor Arrays”,IEEE Transactions on
Electron Devices, Vol. 44, No. 10,pp. 1699-1705, October 1997.
[7] J. Huppertz, R. Hauschild, B.J. Hosticka, T. Kneip , S.Muller, and M.
Schwarz, ”Fast CMOS Imaging with High Dynamic Range”, Proc.
1997 IEEE W- orkshop on Charge-Coupled Devices & Advanced
Image Sensors, pp. R7- 1 to R7-4,bruges (Belgiu m ), June
1997.
[8] R. Hauschild, B.J. Hosticka, S. Muller and M. Schwarz,”A CMOS
Optical Sensor System Performing Image Sampling on a
Hexagonal Grid”, Proc. 22nd European Solid-state Circuits Confer-
ence, pp. 304-307, Neuchatel(Switzerland), September 1996.
[9] R. L. Geiger and E. Sánchez-Sinencio, "Active Filter Design Using
Operational Transconductance Amplifiers: A Tutorial,"
IEEE Circuits and Devices Magazine, Vol. 1, pp.20-32, March 1985.
[10] Y. Matsueda, M. Ashizawa, S. Aruga, H. Ohshima, and S.
Morozumi, New technologies for compact TFT LCDs with high-aperture ratio, Soc. Information Display, Tech. Dig., pp.315-318,1990.
[11] A. G. Lewis, I-W. Wu, T. Y. Huang, A. Chiang, and R. H. Bruce, Active matrix liquid crystal display design using low and high temperature processed polysilicon TFTs, in IEDM Tech. Dig., 1990, pp.843-846.
[12] R.G. Stewart, S.N.Lee, A.G. Ipri, D.A. Furst, S.A. Lipp, and W.R. Roach, A 9V polysilicon LCD with integrated gray-scale drivers, Soc. Information Display, Tech. Dig., pp.319-322,1990.
[13] Lee Hartley, Karan V. I. S. Kaler, Orly Yadid-Pecht, Hybrid Integration of an Active Pixel Sensor and Microfluidics for Cytometry on a Chip, IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS—I: REGULAR PAPERS, VOL. 54, NO. 1, JANUARY 2007
[14] R. Hauschild, B.J. Hosticka, S. Müller, and M. Schwarz, A CMOS
Optical Sensor System Performing Image Sampling on a
Hexagonal Grid, Fraunhofer Institute of Microelectronic Circuits
and Systems, Finkenstraße 61, D-47057 Duisburg, Germany.
[15] RICHARD D. JOLLY AND ROBERT H.McCHARLES, Low-Noise Amplifier for Switched Capacitor Filters, IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. SC-17, NO. 6, DECEMBER 1982.
[16] Y. Hayashi, H. Hayashi, M. Negishi, T. Matsushita, A Thermal
Printer Head with CMOS Thin-Film Transistors and Heating Elements Integrated on a Chip, IEEE Solid-State Circuits Conference(ISSCC), p.266, 1998.
[17] N. Yamauchi, Y. Inaba, and M. Okamura, An Integrated Photo
detector Amplifier using a-Si p-i-n Photodiodes and Poly-Si Thin Film Transistors, IEEE Photonic Tech. Lett., Vol. 5, p.319, 1993.
[18] A new correlated double sampling(CDS)technique for low voltage
design environment in advanced CMOS technology esscirc2002.