液晶平面顯示器時序控制與影像品質之改善

Abstract

TFT-LCD顯示器具有體積小，重量輕，低輻射和省電等優點，非常適合應用在行車裝置、個人隨身裝置、筆記型電腦、桌上型顯示器以及大尺吋的家庭電視。此篇論文我們以液晶的光電轉換特性切入並瞭解液晶應用於顯示科技上的原理，並且使用非揮發性記憶體存取時序控制設定值於時序控制器內，此設計可彈性化的應用於不同製程的液晶顯示器面版，以因應不同的時序控制時間。 在影像品質提升上，為配合六位元的驅動晶片往往影像品質就會變差，故此論文使用影像演算法在空間與時間上將影像品質延伸至近乎八位元的影像品質。 最後將時序控制器和影像演算法實現於XILINX FPGA 上並且在液晶顯示器上做影像演算法的驗證。

ABSTRACT

TFT-LCD is a lighter weight, lower power, no radiation and thinner display than bulky display. In virtue of these characteristics, it is convenient to deploy TFT-LCD in car, PDA, notebook, monitor and TV etc. In this thesis, we describe TFT-LCD panel operation, driving methods from system view, and use Verilog HDL to implementation flexible TFT-LCD timing controller. Due to that different panel module implementations have different characteristics, panel module will affect designs on timing control signals. In early timing controllers the constant timing value was used for a specific TFT-LCD panel. If we want to implement a new panel module we have to design new timing controller. In this thesis we use external EEPROM memory to save associated control timing value, it can reuse timing controller for different panel modules and reduce design cycle for panel system designer. The image data in TFT-LCD panel need to be harmony with 6-bits driver IC, therefore it has low image quality. In this thesis we use frame rate control algorithm to improve it becoming almost 8-bits image quality. Finally, we use XILINX FPGA to verify control timing and use TFT-LCD panel to verify frame rate control algorithm.