I'm using a QC2004A 20 x 4 LCD (blue back ground/white text) with a PCF8574 I2C backpack in a GPS trip logger. I leave the trip logger in the car. When I start the car, the trip logger starts automatically. Everything works fine except on days when the car is hot inside. When first started up the LCD is all white (like if the contrast potentiometer is set incorrectly). As the A/C cools the inside of the car, the LCD returns to normal.
Is this heat slowly killing the LCD or will the LCD be OK?
The QC2004A data sheet I have shows:
- Operating Temperature -20°C~70° (158°F)
- Storage Temperature -30°C~80° (176°F)
While the car is warm, I doubt the temperature exceeds the specs.