Comment error: HT1621 may actually 1/3 bias

[xobs]

The following code appears to indicate that the HT1621 driver is using 1/2 Bias:

luma.lcd/luma/lcd/device.py

Line 922 in 990716e

self.command(0x52) # 1/2 Bias and 4 commons

However, my understanding of the command format of luma.lcd is that this is actually setting 1/3 Bias:

The comment should be updated, or the code should be changed to 0x50 in order to use 1/2 Bias

[thijstriemstra]

The comment should be updated, or the code should be changed to 0x50 in order to use 1/2 Bias

@xobs did you try if it still works properly (or even better) when changing the code to use 0x50?

[xobs]

For me, I had to use 1/3 bias in order to get the display to show anything. But the bias level depends on the display, so it varies from panel to panel.