Design And Implementation Of LCD Controller For Graphic Application

Graphics controllers are widely used in many graphic and display equipments. Recently, focuses are put on the implement and optimization of graphics controllers in portable devices. It consists of MPEG-4 codec, 2D/3D graphics accelerator, camera interface etc. The size, power and cost for handheld devices need considering carefully. The small size LCD graphics controller is discussed in this paper used for image store, process and display. Furthermore, the controllers can be used in other image processing system as IP core. SRAM is embedded for display buffer which stores the display data. Hardware rotation, mirror and PIP+ functions are also supported. The 2D graphics accelerator is designed for accelerate the image move, copy, fill and color expansion. Besides, the camera data regulator, image resizer and YUV/RGB converter are embedded for photo function.Based on the research of FPD's theory and the analysis of function and architecture of graphics controllers in LCD display system, this dissertation presents a front-end design of a graphics controllers chip and FPGA verification with Top-Down design topology. Camera interface, image controller and the embedded SRAM are the most important parts in graphics controller system. Those sections are discussed particularly in the paper. Many focuses are put on techniques for multi-clock design, embedded SRAM bus protocol plan and arbitration method design. The design was implemented by trade-off between speed, power and area. The results of the simulation and FPGA verification are presented. It is a very high speed VLSI Design through the pipeline architecture with power optimization.In the paper, the RTL code of Graphics controller chip is described by using Verilog HDL. In succession, the function verification and logic simulation by Synopsys VCS 6.0.1, and the implementation with Xilinx ISE Series7.1i and Virtex-Ⅱpro xc2vp40-fg1152-5 FPGA device are presented. Finally, the details about the FPGA verification system information and steps are presented. Through the logic and function verification, the LCD/Camera controller proposed to meet the expected performance requirement of the system.