My glasses with my Procyon seem to produce very bright light which is uncomfortable for me even at very low brightness setting (especially at night with no ambient lighting). The problem seems to be the individual LEDs are seen as point sources.
What I did was to place two pieces of black insulation tape about 1cm square over the inner sections so that the light is spread out and now comes from the two reflective strips instead. This works very well, I can now set the brightness at a level higher and still be comfortable.
This seems to have an additional benefit though. I reasoned that the brightness of the LEDs is controlled by timer/counters in the microcontroller set to PWM mode, which means there are a finite number of steps between off and fully on. When the brightnees control is set low this means there are fewer steps available from off to on. You can actually see this, if you look at the LEDs when the setting is high they seem to smoothly transition from on to off, at lower settings they seem to 'step' - in fact at very low settings sometimes some of the LEDs don't even come on. So being able to increase the setting actually seems to produce smoother LED changes.
The ideal solution would have been to open the Procyon and change the resistors that set the LED current, but the above seems to do a similar thing.
Mark.
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