When you are designing an LCD screen it’s important to realize what the temperature limitations are especially if you are using the display on a computer that’s being used in the outdoors where the temperature extremes can dive to below zero. Several things can happen, one is contrast, some displays will either be difficult to view, or difficult to view at a wide range of angles. Another problem is condensation.
Here are the answers to your extreme temperature problems:
Also, you need to be aware of the type of backlighting and control circuitry selected can influence the overall temperature range of the environment.
If your design operates over wide temperature ranges, and especially in cold situations you’ll need to compensate for the temperature range.
One approach to that is Heatron’s Clearview Transparent heaters that can be placed over LCD displays without disturbing the clarity of the display.
Here are some limitations of different types of LCD displays.
Twisted Neumatic (TN) Temperature Ranges
The operational and storage temperature range of a Twisted Nematic (TN) Liquid Crystal Display is dependant on the drive and voltage of a part. The following parameters are for general reference.
TN Standard Temperature Range
Operating Temperature: -10°C to +60°C
Storage Temperature: -20°C to +60°C
TN Wide Temperature Range
Operating Temperature: -30°C to +80°C
Storage Temperature: -40°C to +80°C
There are also specially designed TN LCD that operates at an especially higher temperature (-20 to 105) or lower temperature (-55 to 85).
Super Twisted Nematic (STN) and Film Compensated STN (FSTN) Temperature Ranges
The operational and storage temperature range of a super Twisted Nematic (STN) and Film compensated STN (FSTN) LCDs are set pretty much into two ranges for standard products.
- STN/FSTN Standard Temperature Range
Operating Temperature: 0°C to +50°C
Storage Temperature: -10°C to +60°C
·STN/FSTN Wide Temperature Range
Operating Temperature: -20°C to +70°C
Storage Temperature: -30°C to +80°C
Just keep in mind that these are suggested operating ranges, but the contrast of the displays will change significantly with different temperatures as will the best angle of viewing.
The Answer to Your LCD Screen Heater Problems are Clearview Transparent Heaters
Ask Heatron’s engineers to help you design your display to work across the whole operating range with a Clearview Transparent heaters
Filed under: LCD Screen Heaters