Aging of e-ink screens



Probably, many people remember the days when TV sets and computer displays were used only with cathode-ray tube. One of them was to reduce the disadvantages of contrast due to loss of properties of phosphor coating the screen tube.

TFT - screens which replaced them are very durable. The main element of wear and tear in their first models was backlight, but using LED backlight TFT-technology has become the longest-lived.

Can E-ink screens age? Let's think.

Aging of e-ink screens, dark stains in places which are always  lighted

Basic types of e-ink screens, are dark and light microcapsules which rise on the screen's surface with the appearance of an electric field. Very long and ( or) intensive using of such displays are actually observed by aging of screen. Part of the microcapsules is no longer subject to electrical impulses and " freezes " at one point. Moreover, in different parts of the screen , this phenomenon looks differently.

First, there is a slight loss of contrast over the entire usable area of the display , the screen becomes grayer . The process is not very noticeable , and judge it can be compared only with the new screen .

Second, in those screen areas where there is constantly the same image (e.g., image strips battery status indicating low battery condition , the points separating the hour and minute time display in the status bar , etc.) , dark microcapsules stuck at the screen surface , forming a dark stain . (See top photo ) The output of this place looks dull and washed out. These spots do not disappear after a full refresh .


Displays E-ink Sipix, E-ink Vizplex, E-ink Pearl, E-ink Sipix, E-ink Flex

Third , the edges of the screen image becomes grey noticeably harder than at the other area, and almost doesn't update. (See bottom photo ) Probably, this process is related to the diffusion of molecules of the adhesive layer, which are attached at the edges of the upper plate and the substrate is transparent screen. The image on these sites also looks fuzzy and non-contrast .

All of these processes occur very slowly . The photos shows the screen E-ink Vizplex diagonal of 5 inches, the production of PVI (E-ink), model ED050SC3, age 4.5 years and hours of operation of the order of 3 - 4 million of screen updates . ( 3,5 - 4,5 thousand reading the book ) . Read up on it is still possible, but not comfortable .

Different manufacturers provide different paper-like display life of those products . E-ink Corporation declares lifetime Screen E-ink Pearl equal to 10 million screen updates , or 5 years of service and OED Technologies CO., LTD. - 1000000 updates .


The Poll of E-ink-reader
On what device do you read?
I read only paper books
On an e-book (E-ink)
On an e-book (TFT)
On a tablet
On a smartphone
On a computer
On something else



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What to read?

Arkady Strugatsky, Boris Strugatsky "Roadside Picnic". Red Schuhart is a stalker, one of those strange misfits who are compelled by some unknown force to venture illegally into the Zone and, in spite of the extreme danger, collect the mysterious artefacts that the alien visitors left scattered around. His life is dominated by the Zone and the thriving black market in the alien products. Even the nature of his daughter has been determined by the Zone. And it is for her that Red makes his last, tragic foray into the hazardous and hostile depths...

What to read?

Dmitry Glukhovsky "Metro 2034". The basis of two bestselling computer games Metro 2033 and Metro Last Light, the Metro books have put Dmitry Glukhovsky in the vanguard of Russian speculative fiction alongside the creator of Night Watch, Sergei Lukyanenko. A year after the events of METRO 2033 the last few survivors of the apocalypse, surrounded by mutants and monsters, face a terrifying new danger as they hang on for survival in the tunnels of the Moscow Metro...

Jean Kwok "Girl in Translation". When Kimberly Chang and her mother emigrate from Hong Kong to Brooklyn squalor, she quickly begins a secret double life: exceptional schoolgirl during the day, Chinatown sweatshop worker in the evenings. Disguising the more difficult truths of her life-like the staggering degree of her poverty, the weight of her family's future resting on her shoulders, or her secret love for a factory boy who shares none of her talent or ambition-Kimberly learns to constantly translate not just her language but herself back and forth between the worlds she straddles....

To find these books, check out the "e-library".



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