Driving E-paper Display with Low Power Consumption

Electronic paper display (E-paper) is a new type of display device using micro-capsule technology and has traits like: low power consumption of refreshing, bi-stable (the last image updated can long stay on the screen even after disconnected, almost zero power consumption). However, we still need some control circuits for driving E-paper display.
 

Following are several ways to realize driving E-paper with low power consumption:
 

1. To control the E-paper to enter the deep sleep mode
In this mode, the IC data cannot be saved, and at the second time of E-paper refresh, IC needs to be reset. Generally, the current is about 5uA.
 

2. To control the electronic paper to enter the standby mode In this mode, the E-paper IC data will not be lost. The IC does not need reset operation and general current is about 20uA.
 

3. To control the E-paper to completely power off
A hardware switch is added at the front end of the E-paper drive circuit. It is generally recommended to use P-MOS. After E-paper refreshed, first let E-paper enter the deep sleep mode, and then directly cut off the power supply by controlling P-MOS to achieve zero power consumption.