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Necessary Tools
• This projector
• Personal computer (PC)
• RS-232C cable (attachment)
• CD-ROM (RGB dot pattern)
• ND Filter (1.5 %, 2.5 %, 5 %)
Pixel Defects
(1) Test Conditions
Projection conditions : 40 ± 0.5 inches, Maximum zooming (The Zoom Ring is fully turned to the WIDE.)
Projection distance : Approx. 1.5 m
Test signal : Full white signal and full black signal
Test point : Entire screen
Image quality : Contrast: 0, Brightness: 0
Test start : Two minutes after the lamp illuminates
Projector positioning : Floor-mounted on a level surface with an inclination within ± 5 degrees
Ambient illumination : 5 lx or less at the test point
Test tools positioning : Vertical positioning
Other conditions : The components that have direct effect on the brightness, such as the projection lens, shall be
free from dirt and dust.
Defect Type
White defect : The transmittance of a pixel is 5 % or more of the saturated white when a full black image is
projected. Occurrence of this defect in two adjoining pixels shall be rejected.
White spot : The transmittance of a pixel is 2.5 % or more but less then 5 % of the saturated white when a full
black image is projected. Occurrence of this defect in two adjoining pixels shall be rejected.
Negligible white defect : For the red and blue LCD panels, the transmittance of a pixel is less than 2.5 % of the saturated
white when a full black image is projected. For the green LCD panel, the transmittance of a pixel
is 1.5 % or more but less than 2.5 % of the saturated white when a full black image is projected.
Black defect : A pixel doesn’t transmit the light at all when a full white image is projected.
Pixel short cut : When an image consisting of vertical or horizontal black and white lines having a width of one
pixel is projected, a pixel on a black line transmits the light or a pixel on a white line blocks the
light.
(Pixel short cut is a defect that a pixel wrongly transmits the light when the adjoining pixels are
transmitting the light or that a pixel wrongly blocks the light when the adjoining pixels are blocking
the light.)
CRITERIA OF THE DEFECT PIXEL ON THE LCD PANEL (FOR REFERENCE PURPOSE)
The light is being transmitted.
Pixel short cut
The light is being blocked.
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