LED显示屏虚拟组合像素的分析

doi:10.3969/j.issn.1001-2400.2012.04.032

J4 ›› 2012, Vol. 39 ›› Issue (4): 178-183.doi: 10.3969/j.issn.1001-2400.2012.04.032

LED显示屏虚拟组合像素的分析

赵小明¹;周筱媛²;张建奇¹;邵晓鹏¹

(1. 西安电子科技大学技术物理学院，陕西西安 710071；
2. 西安科技大学计算机科学与技术学院，陕西西安 710054)

收稿日期:2011-07-18 出版日期:2012-08-20 发布日期:2012-10-08
通讯作者: 赵小明
作者简介:赵小明(1974-)，男，副教授，西安电子科技大学博士研究生，E-mail: xmzh@mail.xidian.edu.cn．
基金资助:
国家部委预研基金资助项目(9140A0106110DZ0125);中央高校基本科研业务费资助项目

Analysis of the combined-virtual pixels in LED displays

ZHAO Xiaoming¹;ZHOU Xiaoyuan²;ZHANG Jianqi¹;SHAO Xiaopeng¹

(1. School of Technical Physics, Xidian Univ., Xi'an 710071， China;
2. School of Info. and Computing, Inst. of Computer Sci. and Tech., Xi'an Univ. of Sci. and Tech., Xi'an 710054， China)

Received:2011-07-18 Online:2012-08-20 Published:2012-10-08
Contact: ZHAO Xiaoming

摘要/Abstract

摘要：

分析了户外发光二极管(LED)显示屏中大量使用的虚拟组合像素技术，指出其本质是通过亚像素复用运算针对待显示图像中的单色分量进行低通滤波运算，并采用调制传递函数作为像质评价指标对其在LED显示屏分辨率上的贡献进行了定量分析．提出了LED显示屏的可寻址性概念，指出虚拟组合像素技术可明显提升显示系统的可寻址性，能改善图像显示的锯齿状边界；论证了虚拟组合像素技术未能提升显示分辨率，甚至会使部分画面的清晰度明显下降．

关键词: LED显示, 亚像素运算, 调制传递函数, 平滑滤波

Abstract:

The combined-virtual pixels technology widely employed in outside LED displays is analyzed in detail, with its essence of low-pass filtering to images' homochromatic via reusing subpixels indicated. And its contribution to resolution of LED displays is analyzed quantitatively using the MTF(Modulation transfer function) as an image quality index. The concept-addressability of LED displays is proposed, and it is pointed out that the combined-virtual pixels technology could improve addressability of LED displays and weaken jagged edges of displaying images. Simulation results verify that the combined-virtual pixels technology fails to improve the display resolution, and even causes the obvious decline in some parts of displaying images.

Key words: LED display, subpixel algorithms, modulation transfer function, smooth filtering

中图分类号:

TP274.2

赵小明;周筱媛;张建奇;邵晓鹏. LED显示屏虚拟组合像素的分析[J]. J4, 2012, 39(4): 178-183.

ZHAO Xiaoming;ZHOU Xiaoyuan;ZHANG Jianqi;SHAO Xiaopeng. Analysis of the combined-virtual pixels in LED displays[J]. J4, 2012, 39(4): 178-183.

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LED显示屏虚拟组合像素的分析

Analysis of the combined-virtual pixels in LED displays

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