基于Mini-LVDS技术的TFT-LCD时序控制器的设计

发布时间：2018-04-01 13:06

本文选题：时序控制器　切入点：Mini-LVDS　出处：《液晶与显示》2014年02期

【摘要】：为了实现基于FPGA的具有Mini-LVDS接口的TFT-LCD时序控制器,对TFT-LCD的时序控制器、Mini-LVDS技术的数据排列方式和FPGA的功能进行了研究。通过对Mini-LVDS的数据排列方式的研究,提出了独特的数据处理方法。利用FPGA内嵌的SRAM,设计了一种并行转串行的转换器,把一行的数据分成前半部分和后半部分并同时向外输出;利用D触发器、延时的方法实现了相邻二点的数据串并转换;综合利用移位寄存器、串行加法器和DDR技术,设计了一种8∶1的并串转换电路,实现了子像素内数据的并串转换。利用Xilinx公司的FPGA的输出宏单元,设计了把CMOS逻辑电平信号转换为Mini-LVDS逻辑电平信号的数据发送器。利用Xilinx公司的FPGA的时钟宏单元块,探讨并解决了多时钟的问题。通过研究Mini-LVDS和时序控制器的特性,提出了复位信号的产生方法和相对应的数据处理方法。利用此方法设计出的具有Mini-LVDS接口的时序控制器已应用于本公司的分辨率为1 280×1 024的产品中,数据的传输频率达108MHz,颜色深度为24bit。这个产品的显示画面清晰,过渡自然。利用此方法设计的TFT-LCD的时序控制器基本符合稳定可靠、抗干扰能力强等要求。
[Abstract]:In order to realize the TFT-LCD timing controller with Mini-LVDS interface based on FPGA, the data arrangement mode of TFT-LCD timing controller Mini-LVDS and the function of FPGA are studied.Based on the research of Mini-LVDS data arrangement, a unique data processing method is proposed.Using the FPGA embedded SRAM, a parallel to serial converter is designed, which divides the data of one row into the front part and the back part and outputs out simultaneously, and realizes the parallel conversion of adjacent two points by D flip-flop and delay method.Using shift register, serial adder and DDR technology, a 8:1 parallel string conversion circuit is designed to realize parallel string conversion of subpixel data.A data transmitter for converting CMOS logic level signal to Mini-LVDS logic level signal is designed by using FPGA output macro unit of Xilinx Company.The problem of multi-clock is discussed and solved by using the clock macro cell block of FPGA of Xilinx Company.By studying the characteristics of Mini-LVDS and timing controller, the method of generating reset signal and the corresponding data processing method are proposed.The timing controller with Mini-LVDS interface designed by this method has been applied to our products with a resolution of 1 280 脳 1 024. The data transmission frequency is 108 MHz and the color depth is 24 bit.The display of this product is clear and natural.The timing controller of TFT-LCD designed by this method basically meets the requirements of stability and reliability, strong anti-jamming ability and so on.
【作者单位】：天马微电子股份有限公司研发中心;
【分类号】：TN873.93

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