Acer Extensa 4220 Extensa 4620Z / 4220 User's Guide EN - Page 96

LCD panel ergonomic specifications - lcd screen

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76 LCD panel ergonomic specifications English Design viewing distance Design inclination angle Design azimuth angle Viewing direction range class Screen tilt angle Design screen illuminance Reflection class of LCD panel (positive and negative polarity) Image polarity Reference white: Pre-setting of luminance and color temperature @ 6500K (tested under BM7) Pixel fault class 500 mm 0.0° 90.0° Class IV 85.0° • Illuminance level: [250 + (250cosα)] lx where α = 85° • Color: Source D65 • Ordinary LCD: Class I • Protective or Acer CrystalBrite™ LCD: Class III Both • Yn • u'n • v'n Class II

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76
English
LCD panel ergonomic specifications
Design viewing distance
500 mm
Design inclination angle
0.0°
Design azimuth angle
90.0°
Viewing direction range class
Class IV
Screen tilt angle
85.0°
Design screen illuminance
Illuminance level:
[250 + (250cos
α
)] lx where
α
= 85°
Color: Source D65
Reflection class of LCD panel
(positive and negative polarity)
Ordinary LCD: Class I
Protective or Acer CrystalBrite
LCD:
Class III
Image polarity
Both
Reference white:
Pre-setting of luminance and
color temperature @ 6500K
(tested under BM7)
Yn
u'n
v'n
Pixel fault class
Class II