Acer wistron rb23wabas Manual De Usuario

1. Product Specification (continued)

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. ELECTRICAL

1.4.1.General Requirements

The panel used as the display device shall be an

2048 x 1152 or an 1920x1080 resolution 23W, 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 with a # 3 hardness 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 50,000 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 Wistron . Areas and / or parameters

considered questionable shall be subjected to

detailed measurements .

℃

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ACER V233H