Type of LCD Defect

Repairable defects and their manifestations on LCD units

	Repairable defects
	Defect identification	Description
Defects caused by customer	Scratch Front	Scratched front display panel
	Dust BLU	Dust or other contamination on BLU
Manufacturing defects	Scratch Back	Scratched rear part of the display facing BLU
	Bubble	Bubbles caught under polarised film
	Dust Polfilm	Dust under polarised film
	Polfilm Defect	Defective polarised film (glossy, dirty or clotted)
	BLU Defect	Irregular function of BLU (no light or with apparent waves, spots and other imperfections)
	Black Screen	BLU operative, black screen
	White Screen	BLU operative, white screen with coloured vertical lines
	Flicker	Flickering screen image
	Signal Error	Signal errors manifested through colour irregularities, interference, shadows, slow screen reaction and others
	H-Block	Horizontal block permanently lighted or dark (incl. colours)
	H-Line	Horizontal line permanently lighted or dark (incl. colours)
	V-Block	Vertical block permanently lighted or dark (incl. colours)
	V-Line	Vertical line permanently lighted or dark (incl. colours)

Non-repairable defects and their manifestations on LCD units

	Non-repairable defects
	Defect identification	Description
Defects caused by customer	Crack (Broken)	Broken glass panel
	Mura Black	Large or small (1cm) black mura
Manufacturing defects	Cell defect	Light halo around a defective pixel
	Light leakage	Light leaking beyond the image format
	Mura Color	Colour mura (yellow, strips, etc.). Irregular colour distribution.
	Mura White	Large or small (1cm) white mura
	Pixel defect	Permanently lighted or dark point(s), incl. colours
	Zaratsuki	Clusters of colour points and/or lines
	H-Line Cell Out Defect	Broken or incomplete horizontal line, incl. colours
	V-Line Cell Out Defect	Broken or incomplete vertical line, incl. colours