LG M3704C Owner's Manual page 63

RS-232C
Transmission / Receiving Protocol
06. Contrast(Command : k g)
► To adjust screen contrast.
You can also adjust the contrast in the Picture menu.
Transmission
[k][g][ ][Set ID][ ][Data][Cr]
Data Min : 00H to Max : 64H
Acknowledgement
[g][ ][Set ID][ ][OK][Data][x]
Refer to 'Real data mapping' page A7.
*
07. Brightness(Command : k h)
► To adjust screen brightness.
You can also adjust the brightness in the Picture menu.
Transmission
[k][h][ ][Set ID][ ][Data][Cr]
Data Min : 00H to Max : 64H
* Refer to 'Real data mapping' as shown below.
Acknowledgement
[h][ ][Set ID][ ][OK][Data][x]
Refer to 'Real data mapping' page A7.
*
Controlling the Multiple Product
A8
A8