User's Manual

Last change:
Dec 23, 2016
Torch Bigtide Digital Technology Co., Ltd.
Page 11 of 32
- Luminance meter
Minolta CA-310 or equivalent
- Graphics card
Nvidia Quadro K4000, K4200 or
equivalent
2.4.2 Brightness
 Factory Preset
DICOM 575(Default): Lmin=0.7±0.2 cd/m² Lmax = 575±45 cd/m²
DICOM 550: Lmin=0.7±0.2 cd/m² Lmax = 550±45 cd/m²
DICOM 500: Lmin=0.7±0.2 cd/m² Lmax = 500±40 cd/m²
DICOM 300: Lmin=0.7±0.2 cd/m² Lmax = 300±25 cd/m²
Max. Brightness: ≥600cd/m2 (adjust Backlight, Contrast and Brightness to
Maximum)
 Test Condition: White Luminance (L max) is defined as a luminance of L255 gray
level at the center point on LCD surface. Also Black Luminance (L min) is
defined as a Luminance of L0 Gray level at the center point on LCD surface.
(See Note 1 Note 4)
 The display luminance at the center of the screen shall be controlled to default
luminance of 575 cd/m
2
±25 cd/m² within 30 seconds of power on.
2.4.3 View angle
Left/Right and Up/Down typical 178 degree (CR≥10) (Note 2)
2.4.4 Brightness Uniformity
Homogeneity shall meet to DIN6868-157:2014
Test area at the left half 1920x1920 region and the right half 1920x1920 region.
Homogeneity between the center of the right half and the center of the left
half shall be <20% for DDL255 when tested according to DIN6868-157:2014
section 8.3.7.
Homogeneity H is calculated as follows:
H=200x(L
highest
-L
lowest
)/(L
highest
+L
lowest
)
(Note 5)
2.4.5 Contrast ratio
Default Typical 820:1
(note 3)