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7 Display Performance
7-5 Luminance Uniformi
Luminance uniformity means that the luminance
Table 7-3. Computing Luminance Uniformity
at the position of the lowest brightness must be
more than 70% of the luminance at the area with
Value
70 % (Min)
the highest brightness. Luminance is considered
Variation =
uniform only if the ratio of lowest to highest
Conditions
Display Image : White flat field.
brightness does not exceed 7:10.
Luminance
- Brightness cut off,
Contrast Max.
A: Luminance at position of highest
brightness.
C : Luminance at position of lowest
brightness.
7-6 Color Coordinates (Temperature)
Color temperature is a measure of the radiant
Table 7-4. Color Coordinates
energy transmitted by a color. For computer
monitors, the color temperature refers to the
Value
9300° K : x =0.283+0.02, y =0.29840.02.
radiant energy transmitted by white. Color
6500° K : x =0.313+0.02, y =0.329+0.02.
coordinates are the X and Y coordinates on the
:
:
;
chromaticity diagram of wavelengths for the
Conditions | Display mage — : White flat field at the
visible spect
:
center of display area.
Luminance
: Min: 5 FL, Max: 24 FL.
7-7 Misconvergence
Misconvergence occurs when one or more of the
electron beams in a multi beam CRT fail to meet
the other beams at a specified point, such as at an
opening in the shadow mask.
Center area of display
: (A) < 0.3 mm
Peripheral area of display : (B) < 0.4mm
267 mm
Conditions
_
Display Image: Crosshatch pattern mixed with
R,G,B colors.
7-8 Color Puri
Color purity is the absence of undesired color.
Conditions
Conspicuous mislanding (unexpected color in a
uniform field) within the display area shall not be
Display image: White flat field.
visible at a distance of 50 cm from CRT surface.
Luminance:
15 ft-L at the center of display
area.
Samsung Electronics SyncMaster 15GLi
7-3
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