Nonlinear Correction for Human Eye Feeling to LED Brightness Control
[1]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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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
33
Number of periods:
2012 05
Page number:
138-140
Column:
Public date:
2012-09-10
- Title:
- Nonlinear Correction for Human Eye Feeling to LED Brightness Control
- Keywords:
- brightness feeling; nonlinear correction ; duty cycle; LPM_ROM Module
- CLC:
- TP331.2
- DOI:
- 10.3969/j.issn.1671-6833.2012.05.031
- 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.
- References:
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- Similar References:
Memo
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Last Update:
1900-01-01