In recent snow to make a clock with a 2.9-inch e-ink screen, time is part partial refresh every minute, the other does not refresh. However, the recent discovery of the screen when the partial refresh afraid of light, when the contents of the irradiation light in addition to the partial refresh lighter color portion, the partial refresh abscissa entire range of colors will be lighter, but stronger light, shallow faster. It is not known what they are afraid of light, ultraviolet, infrared or visible light, asked the sale, but the answers given are not suitable for this stuff clock, did not give a reason. And look at the code can not find the cause, is arguably partial refresh to refresh a rectangular area, but why would affect the content outside the region? Incomprehensible, I used python to do, but said the sale of C as well. The following is my experiment, hoping to understand this great God give some advice.
normal display:
Environmental illumination: now is the evening light illumination of 106 lumens, had no effect on the screen.
led illumination: The illumination of 6500 lumens, very bright, normal daytime indoor illumination is about 700, code is a one-hour brush, brush 700 to 20 times the basic illumination when illumination with the 6500 brush 5,6 almost twice the case.
Plus acceleration effect, substantially directly irradiated.
After irradiation seven minutes, in fact, partial refresh seven times. It can be seen significantly lighter color. And the content outside the range of the abscissa is not affected.
Added a so-called anti-ultraviolet radiation film, partial refresh six times, there is no improvement, it appears that visible light will not work (of course, buy a treasure on this film, how much credibility can not be reserved).
I wanted to know how this is going, I hope to explore the great God message.
