![]() In fact, in March last year, "Radio" has published an article on the small size EPD driver, at that time read the feeling is quite simple, is the same as driving the general serial LCD, through the SPI interface to send instructions and data to the EPD controller can be. TFT LCD and so on, such as the HR-TFT LCD used by Pebble is also advertised as electronic paper, but actually not EPD. However, PVI is not the only company that produces electronic paper, TMC, Lundin, AUO, Jiaxian and LG are all producing similar and compatible EPD products, so it is better to call them EPD rather than E-Ink. Preliminary researchįirst of all, for your convenience, let's distinguish a few terms, first is EPD, EPD is not the abbreviation of E-Paper Display, but should be the abbreviation of Electrophoretic Display, E-Ink is the registered trademark of PVI, used to refer to their EPD products. Recently, I found that the price of large size (6 inches, model ED060SC4) E-Ink screen has been reduced to less than 50, so I decided to start researching its driver, and also to make the simplest application: desk calendar. But at that time, their own poor technology, the screen is also expensive, did not successfully implement. At that time I thought if I could drive up with a microcontroller to play a good game. At that time I bought one, was really attracted to the effect of this display. ![]() A few years later, domestic manufacturers have also entered this field, the price of such electric paper books using the EPD screen to less than a thousand dollars. ![]() However, this screen also has some very important advantages, such as the display effect is very close to the paper, not harsh, only in the refresh power consumption and so on. This screen can only display black and white colors (or gray scale), the response speed is also very slow (about 400ms-1s), and also can not actively light, must use ambient light to display. The Kindle is not only designed to be used for reading books, but also has a hardware screen that can only be used for reading books: a black and white EPD screen. In 2007, Apple launched the first generation of iPhone, which completely changed people's understanding and awareness of smartphones, and smartphones and post-PC products have been strengthened, replacing what PCs could only do.
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