Design And Verification On CMOS LCD Controller Based On OpenLDI Standard

After the PC industry has come into autumn, communication, network and household entertainment are regarded as main stimulus in the next period of electronic industry development. Thereinto, the application of the flat panel display in the future will be paid more attention. At the present time, LCD is the maturest and widest on application among all display devices. It has been put into industrialization and still has rapid development. So the development of LCD panel is the key to estimate the developing trend of the LCD controller chip. It is expected that the output of LCD controller chip will be greatly increased with the market mass requirement. This thesis concentrates on the design and verification of an integrated LCD controller with LVDS transmitter based on OpenLDI Standard.First OpenLDI Standard is analyzed and compared, the architecture of an integrated LCD controller with LVDS transmitter is introduced, which escapes the technical bottleneck of the high performance signal converter, and turn away image signal loss on the process of signal conversion at the analog interface. In addition, it realizes both image display controlling and image display scaling. The LVDS transmitter used as LCD controller interface is presented based on the OpenLDI Standard. LVDS driver, CMFB, 7 bits serializer and high precision bandgap-current reference are designed in the thesis.Theoretically, nearest neighbor, linear, cubic convolution and image interpolation based on wavelet are analyzed and compared on interpolation effect, computational complexity and hardware cost. Based on good image interpolation quality with low hardware cost, a new efficient algorithm of interpolation synthesizing nearest neighbor and bi-cubic convolution is proposed. The simulation results show that it has almost the same image interpolation quality and lower hardware cost as bi-cubic convolution. The dynamic dithering algorithm and FRC(Frame Rate Control) technique presented in this thesis provide an improved method for displaying image on LCD panel to greatly increase the number of grey shades or colors. Furthermore, some special effects such as hardware rotation, PIP, Ink-layer transparency and virtual display are realized through controlling image display data.Around the design of the integrated LCD controller with LVDS transmitter, this thesis process behavior, RTL, circuit level verifications, and system back-end design, including DFT, low power design and layout design and verification. The LCD controller has been taped out with standard 0.18μm 1P4M CMOS technology in the 1st Silicon. The results show that the LCD controller can fully satisfy system function requirements and OpenLDI Standard. The digital part of LCD controller work on 3.3V voltage, but the internal digital core work on 1.8V voltage, area is 11.8mm2, and power consumption is 12.2mW.