If increasing brightness on the monitor menu dims the screen, the host system utilizes an inverted dimming logic curve. This behavior can sometimes be mitigated by adding an inline signal-inverting circuit or programming an adjusted voltage offset onto the DIM connection line.
: Often sold in 10-piece bulk packs for repair shops. Amazon : Listed under brands like WEIHU . gyd-9e datasheet
To read data from the GYD-9E, connect it to an Arduino Uno: If increasing brightness on the monitor menu dims