By Sally | 14 October 2019 | 0 Comments

Limit operating temperature of LCD screen

Everyone knows that when designing the LCD screen, we will consider what temperature range of liquid crystal material to use. Usually our LCD screen work is divided into: normal temperature 0-50 degrees, wide temperature -20-70 degrees, ultra wide temperature -30-80 degrees, and even customers will choose -40 degrees of very special materials to design. So, can the LCD screen work normally at extreme temperatures?
In fact, this problem is a bit ambiguous. We know that, for example, the wide temperature range is -20-70 degrees. First, in an environment below minus 20 degrees and above 70 degrees, the LCD screen cannot theoretically work. However, if the temperature has not reached 70 degrees and minus 20 degrees, but it is very close, it can be said that the limit temperature, then the LCD screen can still work?
This is also a problem that many customers will ask. Many customers use a wide temperature LCD screen. When the temperature is very low, the word becomes very light, and in the case of high temperature, the word becomes very deep. It is how it happened?
In fact, it is well explained from the principle of the LCD screen. The reason why the LCD screen can display various patterns or pen segments is because the liquid crystal in the liquid crystal cell is working, and the liquid crystal, as the name suggests is liquid, must be subject to The influence of the environment, when the temperature is high, the liquid crystal will heat up, the flow speed will increase, the feedback will be on the display, the color will become very deep, and in the case of low temperature, the liquid crystal will start to crystallize, the flow will slow down, and the color will be displayed. It changes very shallow, not that it does not display properly, but shows that normal time will be much slower than normal temperature.
So everyone should be able to understand, the working temperature from the LCD screen, just that it can work in this temperature range, there will be no display or no refresh due to environmental factors.
Generally speaking, taking a wide temperature LCD screen as an example, starting from minus 5 degrees and starting at 50 degrees, the display rate will start to change. At minus 20 degrees and 70 degrees above zero, the limit temperature is reached, and feedback is reached. The screen is in a state of no display or darkness, and it is no longer usable. Therefore, the LCD usually advises the customer that if the actual temperature is close to the limit temperature, then it is necessary to select a wider temperature range of the LCD screen to use.

 

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