基于FPGA的自滑动同步法TFT-LCD屏TCON的实现  

Implementation of TFT-LCD Screen TCON Based on FPGA by Self-sliding Synchronization Method

作　　者：王哲[1] 祝月文 王素珍[1] 邹开元 WANG Zhe;ZHU Yue-wen;WANG Su-zhen∗;ZOU Kai-yuan(School of Electronics&Information,Qingdao University,Qingdao 266071,China;Hisense Smart Precision Co.,LTD,Qingdao 266520,China)

机构地区：[1]青岛大学电子信息学院,山东青岛266071 [2]海信智动精工有限公司,山东青岛266520

出　　处：《中国电子科学研究院学报》2024年第1期30-41,共12页Journal of China Academy of Electronics and Information Technology

基　　金：山东省自然科学基金资助项目(ZR2020MF003);山东校企联合基金资助项目(RH1900012993)。

摘　　要：不同厂家、不同尺寸、不同分辨率的TFT-LCD屏与时序控制器TCON的接口不同,对应不同的差分信号格式。为了适应不同屏的图像显示,需要一种可编程的时序控制器TCON。通过在FPGA芯片上采用自滑动同步法,实现了TFT-LCD屏的TCON系统。该系统从视频处理主板输出的差分信号中提取视频数据,提出通过自滑动同步法使之与同步控制信号对齐;将提取的视频数据转换为源驱动器的输入信号,即mini-LVDS或RSDS格式的差分信号,同时产生门驱动器的时序信号;由源驱动器和门驱动器输出的信号驱动TFT-LCD屏显示图像信号。为了测试TCON的性能,使用两块FPGA电路板进行实验。一块FPGA电路板实现TCON时序控制器;另一块作为TCON的输入测试信号源,用于测试所设计的TCON性能。实验结果显示,所设计的TCON能够从LVDS视频差分数据中正确解析出视频数据,并转换为屏的源驱动器和门驱动器信号,驱动TFT-LCD屏显示视频信号。通过对比分析可知,使用自滑动同步法具有资源消耗少,功耗较低等优点。TFT-LCD screens of different manufacturers,sizes and resolutions have different interfaces with the TCON(timing controller),corresponding to different differential signal formats.In order to adapt to the image display of different screens,a programmable timing controller TCON is required.The TCON system for TFT-LCD screens is implemented by using the self-sliding synchronization method on an FPGA chip.The system extracts video data from the differential signal output of the video processing main board,and proposes a self-sliding synchronization method to align it with the synchronization control signal;converts the extracted video data into the input signals of the source driver,i.e.,differential signals in mini-LVDS or RSDS format,and at the same time generates timing signals for the gate driver;and the output signals from the source driver and the gate driver drive the TFT-LCD screen to display the image signals.To test the performance of the TCON,two FPGA boards are used for the experiment.One FPGA board implements the TCON;the other one is used as the input test signal source of the TCON to test the performance of the designed TCON.The experimental results show that the designed TCON is able to correctly parse the video data from the LVDS video differential data and convert it into the source driver and gate driver signals of the screen to drive the TFT-LCD screen to display the video.Through comparative analysis,it can be seen that the self-sliding synchronization method has the advantages of less resource consumption and lower power consumption.

关 键 词：TCON FPGA LVDS信号 自滑动同步法 源驱动器 门驱动器 

分 类 号：TN919.81[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]