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Crystals 2018, 8(11), 421;

Optical Detection of Green Emission for Non-Uniformity Film in Flat Panel Displays

Department of Marine Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80543, Taiwan
Department of Engineering Science, National Cheng Kung University, Tainan 70101, Taiwan
Author to whom correspondence should be addressed.
Received: 9 September 2018 / Revised: 31 October 2018 / Accepted: 5 November 2018 / Published: 8 November 2018
(This article belongs to the Special Issue Thin Film Transistor)
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Among colours, the green colour has the most sensitivity in human vision so that green colour defects on displays can be effortlessly perceived by a photopic eye with the most intensity in the wavelength 555 nm of the spectrum. With the market moving forward to high resolution, displays can have resolutions of 10 million pixels. Therefore, the method of detecting the appearance of the panel using ultra-high resolutions in TFT-LCD is important. The machine vision associated with transmission chromaticity spectrometer that quantises the defects are explored, such as blackening and whitening. The result shows the significant phenomena to recognize the non-uniformity of film-related chromatic variation. In contrast, the quantitative assessment illustrates that the just noticeable difference (JND) of chromaticity CIE xyY at 0.001 is the measuring sensitivity for the chromatic variables (x, y), whereas JND is a perceptible threshold for a colour difference metric. Moreover, an optical device associated with a 198Hg discharge lamp calibrates the spectrometer accuracy. View Full-Text
Keywords: optical; green; colour difference; chromaticity; just noticeable difference optical; green; colour difference; chromaticity; just noticeable difference

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Tzu, F.-M.; Chou, J.-H. Optical Detection of Green Emission for Non-Uniformity Film in Flat Panel Displays. Crystals 2018, 8, 421.

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