Amazon Kindle has been selling well abroad. Although e-books with E-ink screens still have many shortcomings compared with iPads, the Kindle has attracted many users with its paper like reading experience.It is reported that Amazon's Kindle will soon be launched in China. What is this E-ink screen and what is its unique charm compared with traditional LCD screens? Let's take a look.
In fact, in addition to Amazon's Kindle, Nook, Shanda, Hanwang, Sony, etc. have also launched electronic products with E-ink screens, but their popularity is far less than Kindle's.
Many small "microcapsules" are attached to the surface of E-ink screen, which encapsulate black particles with negative electricity and white particles with positive electricity. By changing the charge, particles of different colors are arranged in order, thus presenting a clear visual effect of black and white.
After the substrate of the screen is powered on, particles of different colors can sink or float according to the principle of same-sex repulsion and heterosexual attraction. For example, in the following figure, the substrate at the bottom of the capsule on the left is positively charged, so particles with negative points are attracted down and white particles float up, so the screen displays white.The bottom of the capsule on the right is negatively charged, so the white particles with positive charge sink and the black ones float up, so the screen displays black.Through the simultaneous control of different currents, the capsules can achieve multi-level grayscale.
And once the position of particles changes, even if the power is no longer on, the position of particles will not change, that is, as long as we do not change the screen image, the screen will never consume power.Hehe, this is very important when the endurance of digital products is insufficient.Now there are even mobile phones with E-ink screen on the market. The battery life is very powerful. It is reported that the standby time can reach one month.
In addition, E-ink screen does not flicker. Compared with display technologies such as iPad, E-ink looks like ink on the paper, which is not dazzling when reading.As it is a non luminous body, it can be read clearly in the sun. It is not completely invisible in the solar energy like the iPad. Instead, the screen can be seen clearly in sufficient light, just like paper prints.
However, compared with LCD screen, E-ink has a very serious disadvantage.From the above principle introduction, we also know that there are only black and white particles inside the E-ink screen capsule, saying that this screen can only display two colors of black back.Therefore, this E-ink screen is mostly used to display text.For example, Kindle users are more likely to use it to view e-books and text content.
At present, manufacturers are still committed to improving E-ink screen technology. At present, we have seen some color E-ink screens. Maybe we will see color e-books in the future. In addition, E-ink screens can also become flexible screens. Our textbooks may be like this in the future.
