check - http://www.cheap-thermocam.tk/
- for inspiration
where can i learn about reverse engineering an lcd?
text only or a graphical LCD?
Course LCD hacking:
Chapter 1: find the type and typenumber, you must open the device, and some LCD's just don't have a name and number => EXIT
Chapter 2: google the datasheet, relative easy
Chapter 3: identify the communication lines, can be harder
Chapter 4: sniff the data from them, Can it be soldered? or otherwise? What protocol is used?
Chapter 5: interpret them, can also be hard but mostly ASCII characters are used, what is the data, what is overhead?.
Chapter 6: process the data, relative easy if all other succeeded
Chapter 7: answers to the exercises,
Thats about the outline, can take one hour, can take 3 weeks.
The good part is that hacking a sensor is quite similar.