Hi Folks -
I have an application for low temperature readability of a TFT display. Th e challenge I'm facing is that the convention heater options for displays a re very expensive for my application (large volume). An ITO heater adds si gnificant cost to the standard display.
Given that my end product will be housed in a watertight enclosure of a sma ll volume, it will have some internal heating from micro-controllers and ot her heat generating components. We'd ideally like to be able to read the display as low as -40C. The TFT that I'm looking at as an automotive spec and is rated to -30C although the suppliers indicates that it might not be readable at that temp. We typically update the display content around once per second.
I'm reaching out to see if others might have some clever workarounds or sug gestions for this challenge.
I've often thought about placing power resistors strategically, or using FE Ts to generate and control heat, but had anyone out there had any success w ith this? Here is an old example I found from Electronic Design magazine h ttp://
My display is 4.3" color TFT with a 700 nit backlight from 10 white LEDs.
Thanks!
Paul