1.3.8 Display Communications Channel
The monitor assembly shall provide a display
communications channel that conforms to VESA
DDC2Bi hardware requirements. This configuration
shall contain the 128-byte EDID file as specified by
VESA EDID standard.The monitor should not write to
the EDID file for the first two minutes of operation
following power-up UNLESS some action taken by the
user or the host CPU forces the write (for instance,
requesting the serial number via the OSD).
Furthermore, it is recommended that CMOS switches
be incorporated to isolate the DDC IC from outside
connections while the EDID Fault Management is
being updated. This is to prevent corruption of the data
by attempts to read the data while it is being changed.
1.3.9 Firmware Update Function (same ISP function)
The update firmware need through from the D-Sub
connector, use DDC I2C bus to do update firmware.
1.4 PANEL ELECTRICAL
1.4.1 General Requirements
The panel used as the display device shall be an
WUXGA resolution, 24W TFT-LCD. This panel shall be
approved for use in this monitor.
1.4.2 Panel Timings
The controller included with the monitor shall translate all
video timings from the CPU that meet the timing
requirements listed in Panel specification into timings
appropriate for the panel. Under no circumstances may the
controller supply the panel with timings that may result in
damage. The controller shall insulate the panel from the
CPU , so that the panel shall always be driven per it's own
specification regardless of the timings being sent from the
CPU.
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.Product Specification (continued)
InputVoltage Range Theoperating rangeshall be from 90 to 132 and 195 to 265 AVC
sinusoidalfor all models specified.
InputFrequencyRange Inputpower frequencyrange sha;; be from 47.5 to 63 Hz over the
specifiedinput voltagerange.
PowerConsumption
Powerconsumption for the monitor shall be less than 46W over the
specifiedvoltage andfrequency ranges. In suspend or sleep mode
thepower consumption will be less than 2W.
LineFuse TheAC input shall be fused and become electricallyopen as a result
onan unsafe current level.The fuse many not be user replaceable.
Initial Cold Start
Thepower supply shall startand functionproperlywhen under full
load,with worst case conditions of inputvoltage, input frequenct,
operatingtemperature,and cold backlight lamps.
InrushCurrent
Theinrush current must be limitedto 30A wh en operatedat
120VAC,and 50A when operated at 220VAC. Inrush current is
measuredat an ambient tem perature of 25oC, with the unit
temperaturestabilized in the power-off.
HotStartCycle
Thepower supply shall be damaged when switched ON for one
secondand OFF for one second for sevenconsecutive after
operatingfor one hour at fullload, 25oC, and nominal input line
voltage.
UnderVoltage
Thepower supply shall contain protectioncircuitry such that the
applicationof an inputvoltage below the minimum specified in this
tableshall not cause damage to thepow ersupply unit nor cause
failureof the input.
LineTransient
Thepower supply shall operatewithin IEC 801-4 (± 1KV) and IEC
801-5(± 2KV) for the domestic U.S. version.The U PS power
supplyshall operate and comply with CE mark.
ACto DC Converter Requirements
Table 2
6
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ACERG24