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电子科技大学 中山学院, 广东 中山 528402
收稿日期:2015-12-22,
修回日期:2016-01-15,
纸质出版日期:2016-05-05
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郝亚茹, 邓招奇, 邓春健. LED显示控制系统移存频率加速方法研究[J]. 液晶与显示, 2016,31(5): 470-476
HAO Ya-ru, DENG Zhao-qi, DENG Chun-jian. Increasing shift frequency of LED display control system[J]. , 2016,31(5): 470-476
郝亚茹, 邓招奇, 邓春健. LED显示控制系统移存频率加速方法研究[J]. 液晶与显示, 2016,31(5): 470-476 DOI: 10.3788/YJYXS20163105.0470.
HAO Ya-ru, DENG Zhao-qi, DENG Chun-jian. Increasing shift frequency of LED display control system[J]. , 2016,31(5): 470-476 DOI: 10.3788/YJYXS20163105.0470.
针对LED显示控制系统中移存频率受限于SDRAM的有效读取频率的问题
提出一种加速移存频率的方法。以LED显示控制系统的硬件逻辑为基础
建立扫描频率、移存频率、SDRAM有效读取频率等关键参数的相关数学模型
分析影响扫描频率的各种因素
提出图像数据拆分重组算法用于提高SDRAM的有效读取频率和移存频率。利用硬件逻辑实现该算法后
移存频率由原来的8.25 MHz提升到66 MHz
这就可以最大限度的发挥LED灯驱动芯片的移存能力
LED显示屏扫描频率也随之大幅提高。
A method of increasing shift frequency is proposed in LED display control system. Firstly
mathematical relationship of shift frequency
scanning frequency and effective reading frequency of SDRAM is established to analyze how to increase the former based on hardware logic. Moreover
a splitting and reorganization algorithm of image data is realized to promote shift frequency from 8.25 MHz to 66 MHz
which can maximize the performance of the LED driver chip
and the scanning frequency is also greatly improved.
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