Flat Panel; Panel Timings; Polarizer Hardness; Visual Inspection - Acer S230HL Service Manual

1.4 Flat Panel:

1.4.1 General Requirements:
The panel shall be a FULL HD resolution 23" diagonal TFT-LCD

1.4.2 Panel Timings:

The controller in the monitor shall translate video timings from the PC to meet the timing requirements listed in
Panel specification. Under no circumstances may the controller supply the panel with timings that may result
in damage. The controller shall insulate the panel from the PC, so
according to its specification regardless of the timings being sent from the PC.

1.4.3 Polarizer Hardness:

The outer face of the front polarizer panel shall be covered with a coating with a 3H hardness value.
1.4.4 Backlight Requirements:
1.4.4.1 General Requirements:
The LED shall have a continuous operating life of at least 30000 hours at 25°C. The operating life is
defined as having ended when the illumination of light has reached 50% of the initial value. The
LED 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).
1.4.5 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 meet the SPEC.
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 . 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 will follow the panel specification 300
to 700 lux.
1.4.5.4 Allowable Defects:
No cosmetic defects are allowed except those specified below. The conditions of visual inspections
are as follows:
- Viewing distance: 35~50cm.
- Ambient illumination: 300 to 700 lux.
- Viewing angle range shall
1. Product Specification
be 170 degrees Horizontal and 160 degrees vertical typically.
ACER S230HL
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that the panel shall always be driven
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