LG M3704CJ Owner's Manual page 63

Controlling the Multiple Product
RS-232C
Transmission / Receiving Protocol
07. Contrast(Command : g)
To adjust screen contrast.
You can also adjust the contrast in the Picture menu.
Transmission
Data Min : 00H to Max : 64H
Acknowledgement
* Real data mapping
0 : Step 0
:
A : Step 10
:
F : Step 15
10 : Step 16
:
64 : Step 100
08. Brightness(Command : h)
To adjust screen brightness.
You can also adjust the brightness in the Picture menu.
Transmission
Data Min : 00H to Max : 64H
* Refer to 'Real data mapping' as shown below.
Acknowledgement
Refer to 'Real data mapping' page A7.
*
A8
A8