Why build in heater for LCD?

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udhay_cit

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Hi i am searching of a LCD display for a handheld equipment. The LCD from newhaven display looks good (NHD-C12864A1Z-FS(RGB)-FBW-HT1) because of the RGB backlight. (https://www.digikey.com/product-search/en?vendor=0&keywords=NHD-C12864A1Z-FS(RGB)-FBW-HT1)

The datasheet describes it has a build in 12V heater. I don't know what is build in heater & why it is required for a LCD display. Can anybody describe me the use & requirement of LCD heater!!!

Regards
Udhay
 

LCDs do not work well at low temperatures. If you want one to work at -40C for example then you can use a heater.

Keith
 


LCD lose speed on low temp. You can see effect on almost any mobile phone at low temp (<5C).


Best regards,
Peter
 
Thanks for the reply. I search lot of LCD's & mostly working with -20C to 70C. This one working with -40C. Non of other LCD having the build in heater function.

If i am not operating the LCD in low temperature, can i neglect the heater option?

I hope for the above LCD it has a build in temperature sensor to automatically turn ON the heater. Am i right?

Thanks & Regards
Udhay
 

If you don't need the heater you can either buy it without or ignore the heater pins. The don't include any control - just the heater - so you need your own controller. They have a suggested circuit in the datasheet but you may want to use something more sophisticated using your microcontroller. Bear in mind the heaters take 1A so they are quite power hungry.

Keith
 

Yes. thank you for the explanation...:smile:
 

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