NEC LCD1550X-BK, Руководство по обслуживанию

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(2) Liquid crystal picture defect
Input the confirmation timing with signal generator. Visually check for the defects in each full mono color
pattern of white, black, red, green and blue. Carry out the measurement where there is little effect from outer
light (in a dark room, etc.).
Criterion: Must follow the details of “2.9 Liquid crystal display defect standards”.
2.9 Liquid crystal display defect standards
2.9.1 Condition of appearance inspection
2.9.1.1 Scope of inspection
(1) Visual check must be carried out for appearance inspection.
(2) The inspector (eye point) and the point to be inspected must be located as the picture shown below.
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45 : Appearance inspection when turning OFF the back light
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5 : Appearance inspection when turning ON the back light
2.9.1.2 Environment for inspection
(1) Surrounding temperature must be 25 .
Scope of inspection
(2) The outer light (except for the back light) must be approx. 500(lx) for the inspection with turning ON the back
light.
The outer light must be approx. 1000(lx) for the inspection with turning OFF the back light.
In addition, the outer light must be non-directivity.
(3) The back light must be operated for appearance inspection with turning ON the back light.
2.9.1.3 Picture pattern
Appearance inspection with turning ON the back light must be carried out with eight colored picture patterns
(grayscale 0 and 255).
2.9.2 Definition of applicable area
Liquid crystal display defect standards are only applied to the display part (pixel area).
Outer light
Scope of inspection
Approx. 300mm
STFT-LCD module