Acer S230HL

1. Product Specification
ACER S230HL 14
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1.5 Optical Characteristics:
1.5.1 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 1920x1080/60Hz mode and full white square
pattern with contrast / brightness in default value. The values specified are at an approximate distance 50 cm
from the LCD surface and at 0 viewing angle.
The 9 test points are defined as below:
The variation in surface luminance , δW is defined as
Minimum (P1,P2 …..P9)
δW = --------------------------------------------- *100
Maximum (P1,P2 …..P9)
δW = 75% Mi n
Remark: The black luminance non-uniformity are no defined by panel spec, therefore, we don't define the
spec. for black luminance non-uniformity.
1.5.2 Contrast ratio (CR):
1.5.2.1 General 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
1920x1080/60Hz mode and full white/full black square pattern with contrast/brightness in default
value. The values specified are at an approximate distance 50cm from the LCD surface and at 0
viewing angle. The contrast ratio is calculated as below:
Max. Surface luminance with all white pixels
Contrast ratio (CR) = -----------------------------------------------------------------
Max. Surface luminance with all black pixels
CR = 1000:1 typ. (typ)
1.5.2.2 ACM (Auto Contrast Management):
The input image signal source may be various levels of illumination, and this ACM unit can analyze it
as histogram for the various levels of illumination, according to the analyzed result, when input a low-
luminance level image, display brightness will be adopted to corresponding low level, so that enhance
the contrast rate, this facilitates visual ergonomics enhancement .The monitor should me CR
>12000000:1 when ACM function is active.