[1]琚新刚,勾占锋,孙华..LED亮度调节中的人眼感受非线性校正[J].郑州大学学报(工学版),2012,33(05):138-140.[doi:10.3969/j.issn.1671-6833.2012.05.031]
　JU Xingang,GOU Zhanfeng,SUN Hua.Nonlinear Correction for Human Eye Feeling to LED Brightness Control[J].Journal of Zhengzhou University (Engineering Science),2012,33(05):138-140.[doi:10.3969/j.issn.1671-6833.2012.05.031]
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LED亮度调节中的人眼感受非线性校正()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
33
期数:
2012年05期
页码:
138-140
栏目:
出版日期:
2012-09-10

文章信息/Info

Title:
Nonlinear Correction for Human Eye Feeling to LED Brightness Control
作者:
琚新刚; 勾占锋; 孙华.
河南教育学院电路与系统重点学科组,河南郑州,450046, 郑州师范学院信息科学与技术学院,河南郑州,450044, 鹤壁职业技术学院电子信息工程系,河南鹤壁,458030
Author(s):
JU Xingang; GOU Zhanfeng; SUN Hua
1. Circuits and Systems Key Disciplines of Henan Education Institute ,Zhengzhou 450046, Cchina;2. College of Information Sci.ence and Engineer, Zhengzhou Normal University, 2hengzhou 450044, China;3. Electronic and information Engineering, HebiVocational and Technical College, Hebi 458030 ,China
关键词:
亮度感受;  非线性校正;  占空比;  LPM_ROM模块
Keywords:
brightness feeling;  nonlinear correction ;  duty cycle;  LPM_ROM Module
分类号:
TP331.2
DOI:
10.3969/j.issn.1671-6833.2012.05.031
摘要:
在PWM数字调光方式中,人眼对LED灯具亮度(光通量)线性变化的感受是非线性的.为了对这种非线性感受进行校正,需要对光通量进行补偿.由于光通量和PWM占空比成严格线性关系,故根据光通量和人眼亮度感受的反非线性特性,得到人眼线性亮度感受需要的非线性变化PWM占空比即可.系统采取查找表方式,利用QuartusⅡ平台的参数可设置宏模块,在存储器中预存按反非线性特性计算好的占空比数值,实现光通量补偿.测试显示,系统达到了校正目的.
Abstract:
In PWM digital dimming mode, the human eye Feeling to LED lighting brightness ( luminous fux)linear change is nonlinear. In order to make this nonlinear feeling has been corrected, luminous flux compen.sation is needed. Because a strict linear relationship exists between Luminous flux and pWM duty cycle,therefore, it will be done, according to the Luminous flux and the nonlinear characteristics of human eyebrightness feeling, to obtain nonlinear change PWM duty cycle of human eye linear brightness feeling. LUTand LPM of Quartus ll platform are used by the system, the data of duty cycle according to the nonlinear char-.ecteristics calculation are deposited to realize luminous flux compensation. As is shown in the test, the systemgets corect.
更新日期/Last Update: 1900-01-01