Appendix F Definition of viewing angle

mermaid ventura 150 TFT x4 - User manual Version 1.1

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/m2 (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.

90°

0° +55° -60°