What factors should you consider when choosing a TFT LCD display? part three

Readability

It is important that displays used in industrial applications support clear and accurate viewing from multiple angles in a variety of ambient light conditions. The brighter the environment, the more difficult it is to read a standard transmissive dot matrix LCD display with a typical brightness of 250 to 300 cd/m2. Ruixiang Digital has developed displays that can operate in the 800-cd/m2 range and above by implementing high-efficiency LEDs for the backlight unit – combined with special brightness-enhancing films if necessary.

Increasing the contrast ratio of displays is another effective way for display manufacturers to improve display readability in bright environments. Typical contrast ratios for non-industrial displays are in the range of 200:1 to 300:1, which may not be sufficient when a machine operator is viewing the display from a distance. Displays with a contrast ratio of approximately 500:1 or higher are more suitable for industrial environments. Another benefit of this approach is that it does not increase power consumption.