hmm.......... I have never used one of these "Chinese" displays- but I did some experimentation many years ago on altering the factory illumination levels on analogue dashboard modules.
If anyone here is willing to "try stuff" - maybe some of my early findings might work on these retrofit displays?
First and as indicated in a previous reply - the original clock-dial panel contains a photo-transistor that was embedded between the numerals "7" and "8" on the tacho (see below). I assume from
@Cuzoe that the Chinese AID displays do NOT have an equivalent device.
OK, I'm not sure if others are aware, but MQB platform cars use a bunch of adaptation channels called
dimming_characteristic_curve_adjustment to modulate illumination levels according to a variable component
These channels can be found in lots of modules and they generally consist of both "X" and "Y" series. On the module that lives @address hex17 ("Dashboard" for OBD11, or "Instruments" for VCDS) the channels specifically relate to the following display elements:
- clock dial day
- clock dial night
- gauge
- indicator lights
- middle display main field
- Phototransistor
In the case of the hex17 module, the variable component is the lighting level in the cabin generally, and the amount of sun-light that hits the body of the phototransistor specifically
Now, I don't know which of the facets above are used by the "Chinese" display, but my initial guess is that maybe the two likely option to investigate is
1. above -and notwithstanding that the phototransistor is not used, perhaps
6. above? For emphasis again, I'm guessing!
So, purely as a suggestion - maybe someone who has installed these Chinese displays could try altering the factory settings on their car and report back their observations.
As a guide to experimentation, see my tweak instructions
HERE AND
HERE. However, please be aware that my suggestions in the links are intended for an analogue display!
Don
PS: As a suggestion and given that the phototransistor no longer modulates the illumination level on the Chinese dispay - maybe try applying extreme values to ALL the set-points in the channels. Illumination incease happens on these channels when X values are decreased and when Y values are increased. So, for max illumination, maybe start by changing ALL X values to
00 in my first link and ALL Y values to
64 in my second link (64 means hex64 - which is decimal 100).
Of course- take note of the original factory settings before starting and revert back if needed
