Visual Characteristics; Test Conditions; Brightness; Image Size - Philips 220S2CB/00 Service Manual

82 Meridian 2

4. VISUAL CHARACTERISTICS

4.1 Test conditions

Unless otherwise specified, this specification is defined under the following conditions.
(1) Input signal: As defined in 3.3, 1680 x 1050 non-interlaced mode (1680 x 1050@60Hz), signal
sources must have 75 ohm output impedance.
(2) Luminance setting: controls to be set to 300 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 °C

4.2 Brightness

Follow Panel specification.

4.3 Image size

Actual display size 337.920 mm x 270.336 mm

4.4 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:
Where B_max = Maximum brightness

4.5 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:

4.6 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:
Product specification
11500K
9300K
8200K
7500K
( B_max - B_min )
B_max
B_min = Minimum brightness
ABS (YA - YB)
⎯⎯⎯⎯⎯⎯⎯⎯⎯ X 100%
CIE coordinates
X 100% > 75%
YA
(x,y)
x = 0.270 ± 0.02
y = 0.281 ± 0.02
x = 0.283 ± 0.02
y = 0.297 ± 0.02
x = 0.291 ± 0.02
y = 0.306 ± 0.02
x = 0.298 ± 0.02
y = 0.314 ± 0.02
< 1.5 %
PerfecTune II
PerfecTune II
PerfecTune II
PerfecTune II