基于控制串行传输的LED屏列驱动芯片设计  

The design of LED display column driver chip based on control serial transmission

作　　者：李梦杰 邓良 陈章进[1,2] LI Meng-jie;DENG Liang;CHENG Zhang-jin(Microelectronic Research&Development Center,Shanghai University,Shanghai 200444,China;Computing Center,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学微电子研究与开发中心,上海200444 [2]上海大学计算中心,上海200444

出　　处：《微电子学与计算机》2020年第5期6-12,共7页Microelectronics & Computer

基　　金：国家自然科学基金(61674100,61774101)。

摘　　要：由于传统列驱动芯片在采用串行方式逐行逐列进行数据传输时存在传输效率低的问题,本文设计一种基于控制串行传输的列驱动芯片.该芯片结合串行传输以及并行传输方式的特点,在JXI5020列驱动芯片的基础上,增加控制数据移位寄存器以及控制数据处理器将用于子空间寻址的控制信号串行化传输,以串行方式实现基于并行传输的子空间扫描;该芯片打破了数据在串行方式下逐行逐列传输的限制,降低时间冗余率,提高了数据传输的效率.通过搭建LED扫描驱动系统及其仿真验证平台,验证了该驱动芯片的正确性.在显示256级灰度、分辨率为960*720的图像时,与JXI5020进行对比,得出本文设计的驱动芯片能够在没有亮度损失的条件下,将冗余率降低至5.9%,有效减少了单元面板信号接口的数量.Since the traditional column driver chip has the problem of low transmission efficiency when it adopts the serial mode to transmit data row by row and column by column, this paper designs a column driver chip based on the control serial transmission. The chip combines the characteristics of serial transmission and parallel transmission mode. Based on the JXI5020 column driver chip, the control data shift register and the control data processor are added to serialize the control signal for subspace addressing, so as to realize the subspace scanning based on parallel transmission in a serial mode. The chip breaks the limit of data transmission in serial mode, reduces the time redundancy and improves the efficiency of data transmission. The correctness of the drive chip is verified by setting up the LED scanning drive system and its simulation verification platform. Compared with JXI5020, the driver chip designed in this paper can reduce the redundancy rate to 5.9% without brightness loss, effectively reducing the number of cell panel signal interfaces.

关 键 词：发光二极管显示屏 列驱动芯片 串行传输 并行传输 子空间扫描 传输效率 

分 类 号：TN402[电子电信—微电子学与固体电子学] TN873.92