1.4.3 Polarizer Hardness
The outer face of the front polarizer panel shall be
covered with a coating witha#3hardness value
1.4.4 Backlight Requirements
1.4.4.1 General Requirements
The backlight assembly shall be designed to
support field replacement at the customer site or
authorized service center. The lamps shall have a
continuous operating life of at least 40,000 hours at
25 The operating life is defined as having ended
.
when the illumination of light has reached 50% of
the initial value. The lamps shall extend a sufficient
amount from the edge of the light guide that
sputtering over the life of the lamps shall not cause
degradation of the luminance uniformity (such as
non-illuminated bands along the edges of the
display).
1.4.4.2 Lamps Startup Time
The backlight lamps shall start about 2 sec of the
time the monitor power switch is pressed or the
monitor is restarted from a power - down mode
.The starting time shall stay about 2 sec. for the
minimum expected life of the lamps.
Test conditions are as follows :
Ambient Light ---------------------- < 1.0 lux
Temperature-------------------------- 10
Inactive Time ----------------------- > 24 hours
1.4.5 Defects
1.4.5.1 Visual Inspection
The LCD panel shall be inspected with all pixels
set to white , black , red , green , and blue. The
color variation, brightness variation , and overall
appearance must not be perceived as poor quality
by Lite-On . Areas and / or parameters considered
questionable shall be subjected to detailed
measurements .
1.4.5.2 Display Degradation
Over the life of the product , variation of the
parameters specified in Panel specification shall be
maintained within reasonable limits.The panel must
not exhibit any significant defects while in
operation ( excluding the CCFL operation ).This
does not in any way change the warranty given by
the panel manufacturer .
℃
1.4.5.3 Light Leakage
Except for the active display area , there shall be no
light emission visible from any angle from any other part
of the display . For this test , the ambient illumination
must follow panel's specification.
1.4.5.4 Allowable Defects
No cosmetic defects are allowed except those specified
below.The conditions of visual inspections are as follows
For R17 Series.
Viewing distance is to be approximately 35-50cm
Ambient illumination is to be 300 to 700 lux.
Viewing angle shall be at 90 degree.
Defects not apparent within one minute shall be
ignored.
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1. Product Specification (continued)
Dark / Spots / Lines
S po t s o r line s th a t ap p ea r d ar k in the d isp la y p atte rn s a n d a re
usually the result of contam ination. D efects do not vary in
size o r inte ns ity (c on tras t) w he n co n trast vo ltag e is va ried .
Contrast variation can be achieved through the use of varying
gray sh ade patterns.
Bright Spots / Lines
Spo ts o r lines that ap pear light in the display patterns.
Defects do not vary in siz e o r intensity (contrast) w hen
contrast voltage is varied. Con trast variation can be achieved
through the use of varying gray shad e patterns.
Po larizer Scratch
Wh en th e un it lights , lines ap p ear ligh t (w h ite) w ith d isp lay
patterns dark and do not vary in size. Physical dam age to the
polarizer that does not damage the glass
Polarizer Dent
Wh en th e u n it lights , sp ots a pp ea r ligh t (w h ite) with d isp lay
patte rns d ark an d do n ot va ry in siz e. Ph ysica l d amag e to th e
polarizer that does not damage the glass.
R ub b ing L ine
Horizontal or diagonal lines that appear gray with the display
patterns dark and may have resulted from an “out of control”
rub bin g p roc ess o n th e po lyim id e o r “w av es” on the BEF s o r
prism sheets.
New ton R ing The “rainbow” effect caused by non-uniform cell thickness.
Mottlin g
Wh en th e un it lights , variatio n / n on – unifo rmity
(splo tch in ess ) app ea rs light (w h ite) w ith th e d ispla y and
m ight v ary in size.
Dim Line
Wh en th e un it lights , line(s) in th e mon itor (v ertica l) or m a jor
(ho rizo n tal) ax is ap pe ar dim, but n ot co mple tely on o r off.
Cross Lines Off
Wh en th e un it lights , lines in b o th the m in or an d majo r ax is
do not appear.
Bright/DarkDot Asub–pixel(R,G,Bdot)stuckoff/on(electrical).
1.4.5.5 Defect Terminology
Table 3 gives the descriptive terms used in classifying
defects.
1.4.5.6 Smudges, Streaks and Smears
When viewing the panel oriented so as to maximize
reflected light , there shall be no visible smudging ,
streaking, smearing or other nonuniformity from
contaminants ,fingerprints,or defects in any of the visible
surfaces. This is independent of whether the unit is
operating or off .
1.4.5.7 Other Defects
Undefined defects that are considered to be rejectable
by Lite–On will be reviewed by Lite-On as they become
apparent. These panels will be referred to the Lite - On
Corporate / Manufacturer Purchasing Agreement for
disposition.
6
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