Chassis Plans CPX2-173, Техническое описание, Страница: 9 / 54

Chassis Plans CPX2-173 Technical Reference Chapter 1 - Introduction
Page 3
Figure 3 – Comparison of Reflections with and without Optical Bonding
The resulting structure in conjunction with the CPX2-1732 Hi-Bright 1000nit panel has greatly enhanced optical
characteristics in high ambient light conditions. The optical adhesive used is a silicone RTV and offers other
benefits mechanically to the LCD as well. The adhesive remains pliable and therefore acts as a shock
absorbing medium for the front of the LCD. Together with the additional layers of glass provides a very rugged
composite structure. Another benefit is that should breakage actually occur the shards of glass will be retained
together to prevent injury to personnel. The adhesive also prevents any condensation from building up in the air
gap between the layers of glass which would cause fogging of the display. Finally, the added mass bonded to
the front of the LCD display adds a thermal conduction path to help dissipate the heat generated in the
backlights themselves.
By eliminating the majority of reflected light, the apparent contrast improves making the display more readable in
high bright situations. An alternative to improving the contrast is to increase the back light levels to overpower
the reflected light. The downside to this approach is the higher power requirements and higher heat generated
by the backlights.
Photo Courtesy of
GDS Clearview
Figure 4 – Comparison with and without Optical Bonding
Reflected
Light
Total
22.5%
4.5%
4.5%
4.5%
4.5%
4.5%
Without Optical Bonding
Or AR Coating
Reflected
Light
Total
0.7%
0.3%
With Optical Bonding
And AR Coating
0.1%
0.1%
0.1%
0.1%