hooziewhatsit
New member
I was wondering if CF had any specs on how contrast will change with temperature, for a constant Vo voltage?
I'm developing a product that will be used in vehicle cabs, so the temp range could range anywhere from 0*F to ~150*F.
I'll be using the CFAH2004K-TMI, running at 3.3v (I've read here that will work?). Vo will be connected between +3.3v and -3.3v.
I'm curious to know if a constant Vo will keep the LCD visible over this range? If not, I plan on using a digital pot to automatically change the Vo voltage to keep the LCD readable over this range (probably user defined values of 'readable')
The datasheet for that LCD says it's operating temperature range is -20 to 70*C (-4*F to 158*F). How much of that is because under normal single supply operation, the voltage range available at Vo is insufficient to provide a readable display?
Thanks in advance,
-Dave
I'm developing a product that will be used in vehicle cabs, so the temp range could range anywhere from 0*F to ~150*F.
I'll be using the CFAH2004K-TMI, running at 3.3v (I've read here that will work?). Vo will be connected between +3.3v and -3.3v.
I'm curious to know if a constant Vo will keep the LCD visible over this range? If not, I plan on using a digital pot to automatically change the Vo voltage to keep the LCD readable over this range (probably user defined values of 'readable')
The datasheet for that LCD says it's operating temperature range is -20 to 70*C (-4*F to 158*F). How much of that is because under normal single supply operation, the voltage range available at Vo is insufficient to provide a readable display?
Thanks in advance,
-Dave
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