|Project duration:||~3 months|
|Projectvorm:||Fixed price, cost incurred|
|Period:||Summer 2015, spring 2016|
|Activities:||Idea, proof of concept, design electronics and firmware, prototyping, chip-on-glass|
|Technologies:||STM32 Cortex M4, SPI, DipTrace, C, USB, USB-MSC, EcFAT, solar power, COG|
This project is about the development of a monochrome reflective display system. Although quite similar to the preceding CMY display project, the focus is now on emphasis of the low-power nature of the technology.
The display elements of this technology consists of small 7x11-pixel 'tiles'. These tiles fit together to form a larger display element. Because of this modular approach, we have come up with a solution to add the necessary electronics on the back of each tile. Next these tiles are interconnected by a serial pixel bus and power distribution.
Being just a black&white display, the driving circuitry is much simpler than the 256-level PWM driving on the CMY display. Because of this, the tile-driver electronics is basically a single chip solution using a 80-channel high voltage driver with SPI-bus data interface.
One of the lead customers on this ECCB technology, a manufacturer of outdoor LED screens, has asked us to develop the interfacing between this new technology and their existing LED controllers. This gave them a quick start on experimenting and testing with these reflective screens.