Research And ASIC Design On Integrated Framework Of Scaler And TCON Based On Adjustable Window Scaling Model

High Definition Flat Panel Display (FPD) industry is one of the most important components of national economy and enjoys high priority of scientific development blueprint. The post-process drving framework of FPD system has been studied and its composition characteristic has been analysised. Based on the drawbacks of traditional scaling engine in image pre-processing, and circuitry redundancy and information repetitive accession in scan-driving, this paper has proposed a novel adjustable window scaling model (AWSM) and established the organic integrated framework which combines the front-end datapath and back-end datapath in display systems. Main work and achievements of the paper are listed as follows:1.By means of researches on conventional image scaling algorithms, this paper brings forward a theory which is so called as"Even Energy Distribution". Based on the theory, an adjustable window scaling method (AWSM) is proposed and its related mathematic model and algorithm is deduced as well. Scaling with the proposed algorithm will achieve better results in any scaling ratio as compared to conventional algorithms and can efficiently preserve image edges and prevent mosaic effect.2.Traditional image post-process framework is mainly composed of two separate parts: the front-end datapath and the back-end datapath, which is represented by scaler and display timing controller (TCON) respectively. This paper studies the drawbacks caused by the structural separation and proposes to combine the two parts to achieve an integrated post-process framework called Scaler and TCON integrated framework. With the integrated framework, the hardware redundancy can be reduced and repetitive data accession can be eliminated as well, which in turn enhances the system reliability and efficiency and reduces product cost as well.3.The AWSM-based Scaler and TCON scan-drive IP core is designed, which realized the AWSM-based Scaler and TCON integrated framework. FPGA implementation was first carried out to verify the function of the integrated scan-drive model. After the FPGA verification, ASIC design for the integrated scan-drive IP was carried out. Test platforms which targeted a 17-inch 1280×1024 dot-matrix color TFT-LCD display have been constructed to verify the IP function. Successful results have indicated the effectiveness of the IP and suggested its good application value.Application objects in this paper are based on TFT-LCDs, while the proposed framework and achievements are of universal significance. With proper modification, the proposed integrated framework can be applied to other kinds of FPD displays.