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Meridian 3
Factory requirements
Factory requirements are taken into account.
It needs to do calibration to make sure the same detection distance.
Service requirements
Service requirements are taken into account.
In the factory mode, it needs to reserve the max. distance adjustment value to adjust distance ranges.
5 VISUAL CHARACTERISTICS
5.1 Test conditions
Unless otherwise specified, this specification is defined
under the following conditions.
(1) Input signal : signal sources must have 75 ohm output impedance.
(2) Luminance setting : controls to be set to 250 nits with full screen 100 % duty cycle white signal
(3) Warm up: more than 30 minutes after power on with signal supplied.
(4) Ambient light: 400 -- 600 lux.
(5) Ambient temperature: 20 ± 5 qC
5.2 Brightness/ Brightness uniformity
Follow Panel specification.
5.3 image size
Actual display size,follow panel spec.
5.4 Brightness uniformity
Set contrast at 100% and turn the brightness to get average above 300 nits at centre of the
screen.
Apply the Fig 1, it should comply with the following formula:
( B_max - B_min )
X 100% > 75%
B_max
Where B_max = Maximum brightness
B_min = Minimum brightness
5.5 Check Cross talk (S)
Apply Pattern 2. Set contrast and brightness at 100 %.
Measure YA. Then output Pattern 3 and measure YB.
the cross talk value :
ABS ( YA - YB )
X 100% < 1.5 %
YA
5.6 Color temperature adjustment
There are three factory preset white color 9300K, 6500K, sRGB.
Apply full white pattern, with brightness in 100 % position and the contrast control at 50 % position.
The 1931 CIE Chromaticity (color triangle) diagram (x ,y) coordinate for the screen center should be:
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