Mermaid Technology 150 Flat Panel Television User Manual


 
mermaid ventura 150 TFT x4 - User manual Version 1.1
P/N: 20-1700-00456 Page 21 of 24
Appendix F: Definition of viewing angle.
Viewing angle is defined as the range,
measured at a 90° angle from the display
surface plane in the centre of the display
panel to that angle, where the the
contrast value has dropped to 10:1 or
5:1. The exact value is defined by the
manufacturer of the panel. See drawing.
Viewing angle is defined both vertically
and horizontally.
The two sets of parameters are rarely
common.
The panels in the mermaid ventura 150 x4 have the folloing data:
Viewing angle Vertical +55°/-60°
Viewing angle Horizontal: +/-70°
Contrast: 300:1 (The difference between max. white and black)
Brightness: 250 cd/m
2
(Backlight output)
Because two panels are mounted on top of each other in pairs, it’s impossible to
experience the same contrast value on all 4 panels, when looking at them from
the same angle.
Please remember, thet even though the viewing angles are fairly high, the
contrast is allowed to drop from e.g. 300:1 to 5:1 within that range, which
equals to 60 times!
The user will typically experience this as colour differences and backlight
uniformity differences.
All 4 panels are taken from the same production batch, which ensures the best
panel homogeneity as possible.
+55°
-60°
0°
90°
+55°
-60°
0°
90°
mermaid
ventura 150x4
Upper
panels
Lower
panels