Acer AL1716W Manuel d'entretien - Page 9
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ACER AL1716W
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2.5.6 Smudges, Streaks and Smears: When viewing
the panel oriented so as to max. reflected light,
there shall be no visible smudging, streaking,
smearing or other non-uniformity from
contaminants, fingerprints, or defects in any of
the visible surfaces. This is independent of
whether the unit is operating or off.
2.5.7 LCD Inspection: Put LCD panel on inspection
table and illuminate the panel with a daylight
fluorescent lamp located above the panel
surface such that the luminance at the LCD panel
is between 1000 lux. and 1500 lux. Defect limits
are given in Table 4.
Table 4. Descriptive Terms
Average Diameter
Smaller of (L+W)/2 or L/20 + 2W
< 0.1mm
0.1mm- 0.3mm
0.31mm- 0.5mm
0.51mm- 1.25mm
1.26mm- 2.5mm
2.51mm- 0.3mm
Greater than 3.75mm
Allowable distance between spots of two sizes is
the minimum separation number for the smaller
spot. Therefore, if there are two spots including
1.30mm and 0.4mm in diameter, they must be at
least 15mm apart.
2.6 Optical Characteristics:
2.6.1 Brightness uniformity: The uniformity is
determined by using a photometer (CA-210) to
measure the 9 points luminance in front of
monitor after at least 30 minutes warm up. It shall
be test at 1440x900/60Hz mode and full white
square pattern with contrast / brightness in
default value. The values specified are at an
approximate distance 20 cm from the LCD
surface and at 0 viewing angle. The 9 test points
are defined as below.
The brightness uniformity is calculated as below:
2. Flat Panel Specification (continued)
Acceptable Number
MinimumSeparation
Non countable
N/ A
10
15mm
10
15mm
5
15mm
3
25.4mm
3
25.4mm
None
Not applicable
Brightness uniformity
Remark: The black luminance non-uniformity are
no defined by panel spec, therefore, we don't
define the specification for black luminance
non-uniformity.
2.6.2 Contrast ratio (CR): The contrast ratio is determined
by using a photometer (CA-210) to measure the
maximum and minimum luminance in front of monitor
after at least 30 minutes warm up. It shall be test at
1440x900, 60Hz mode and full white and full black
square pattern with contrast and brightness in
default value whcih specified are at an approximate
distance 20cm from the LCD surface and at 0 viewing
angle. The contrast ratio is calculated as below.
CR=(Max. full white luminance)/(Max. full black
luminance)
CR = 500: 1(ty)
2.6.3 Response time: The response time is defined as
below.
Tr + Tf : 8 msec typ.
Remark: optical response time vs gray scale, test
condition for brightness set to max. and contrast set
to default.
2.6.4 Viewing angles: The viewing angles are measured at
CR>10 as below.
Horizontal Left: 70 degrees typ. (HSD170MGW1-A);
Right: 70 degrees typ. (HSD170MGW1-A);
Vertical
Up:65 degrees typ. (HSD170MGW1-A);
Down:65 degrees typ. (HSD170MGW1-A);
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