LCD source driver feedback system and method
View Patent ↗An electrical assembly for detecting failures in an LCD source driver includes a plurality of active channels on the source driver which communicate electronically with an LCD. A split active channel on the source driver is provided with an original signal and splits the original signal into an active split channel and a dummy split channel. The active split channel is sent to the LCD. A microprocessor receives the dummy split channel and compares the received dummy split channel signal to the original signal.
1. An electrical assembly for detecting failures in an LCD source driver comprising:
a plurality of active channels on the source driver which communicate electronically with an LCD;
a split active channel on the source driver which is provided with an original signal and splits this into an active split channel and a dummy split channel where the active split channel is sent to the LCD and the dummy split channel bypasses the LCD; and
a microprocessor which receives the dummy split channel and compares the received dummy split channel signal to the original signal.
2. The electrical assembly of claim 1 further comprising:
an analog to digital converter which digitizes the received dummy split channel signal before comparing it to the original signal.
3. The electrical assembly of claim 1 wherein:
the microprocessor is located on a display interface board.
4. The electrical assembly of claim 1 further comprising:
a second split active channel on the source driver which is provided with a second original signal and splits this into a second active split channel and a second dummy split channel where the second active split channel is sent to the LCD; and
wherein the microprocessor additionally receives the second dummy split channel and compares the received second dummy split channel to the second original signal.
5. The electrical assembly of claim 4 wherein:
the microprocessor is adapted to transmit an error message when either (1) the received dummy split channel signal does not match the original signal or (2) the received second dummy split channel signal does not match the second original signal.
6. The electrical assembly of claim 5 wherein:
the error message comprises any one of the following: a blank screen, flashing lights, a textual error message on the LCD, or an audible warning.
7. The electrical assembly of claim 1 wherein:
the microprocessor is adapted to transmit an error message when the received dummy split channel signal does not match the original signal.
8. The electrical assembly of claim 1 wherein:
the original signal is data for generating an image on the LCD.