YCbCr的LCOS驱动芯片面积优化的方案设计

摘要

In the paper, a data processing scheme applied on the display driver chip is proposed, which solves the problem of the excessive area of display drive chip in LCOS micro display system under high resolution.This scheme converts the input data in RGB (format) to YCBCr (format).The YCBCr data is stored after the compression and decompress it when it is displayed.Then it will be restored to RGB image display by interpolation process.For the 1920×1080 resolution, the scheme saves 4 MB of data amount of drive chip.Taking an example of TSMC Memory Compiler at 65 nm, the estimated saving area is about 41.5 mm2, accounting for 31.8％of the total area.The size of the driving chip is reduced from 11.4 mm×11.5 mm to 9.4 mm×9.5 mm.%提出了一种应用在显示驱动芯片上的数据处理方案,解决了高分辨率下LCOS微显示系统中显示驱动芯片面积过大的问题.此方案将输入的RGB格式转换为YCbCr数据格式,对YCbCr数据进行压缩处理后进行存储,在显示时将存储的YCbCr数据解压缩,进行插值处理还原为RGB图像显示.对于分辨率为1920×1080的图像,本文提出的方案节省驱动芯片数据量4MB;在65nm工艺下以TSMC Memory Compiler进行面积估算,节省面积41.5mm2,占整体面积的31.8％,驱动芯片的大小由11.4mm×11.5mm减少为9.4mm×9.5mm,具有明显的面积优势.