Improved measurement of dynamic modulation transfer functions on display using pursuit camera method based on wavelet-denoising method

A new method was developed for studying dynamic modulation transfer functions (DMTFs) of liquid crystal display (LCD) based on the slanted edge method, improved wavelet-denoise (IWD) method, and Fourier transformation. Measurements were made for capturing the images of moving step-edge patterns on t...

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Bibliographic Details
Published in:Optical review (Tokyo, Japan) Japan), 2011-01, Vol.18 (1), p.153-156
Main Authors: Hsu, Shau-Wei, Chang, Chia-Ying, Chung, Zong-Ying, Wu, Kuei-Neng
Format: Article
Language:English
Subjects:
Atomic
Lasers
Microwaves
Molecular
Optical and Plasma Physics
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Quantum Optics
Regular Papers
RF and Optical Engineering
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Summary:A new method was developed for studying dynamic modulation transfer functions (DMTFs) of liquid crystal display (LCD) based on the slanted edge method, improved wavelet-denoise (IWD) method, and Fourier transformation. Measurements were made for capturing the images of moving step-edge patterns on the display by a slightly tilted pursuit camera. The scanning-rate and contrast-dependent DMTFs of a LCD were demonstrated, and the corresponding parameters such as blurred edge width (BEW), spatial sharpness, and motion picture response time (MPRT) were calculated from the DMTF curves. A simple linear relationship between these parameters was found. The properties of a cathode ray tube (CRT) display were also measured for comparison with those of the LCD.
ISSN:1340-6000
1349-9432
DOI:10.1007/s10043-011-0014-2