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The different types of E ink imaging film

E ink film typeTemperature rangeColorsOperating
AuroraZero aboveblack, white
0°C to +50°C-20°C to +60°CStandard monochrome display for most indoor operating conditions.
Support fast updates.
Aurora -25Freezerblack, white
-25°C to +30°C-25°C to +60°CSuitable for freezing operating conditions.
Wide TemperatureWideblack, white
-15°C to +60°C
(Fast Update: 0°C to +50°C)
-25°C to +70°CNew generation of our unique monochrome display and support fast updates.
Spectra RedZero aboveblack, white, red
0°C to +40°C-25°C to +60°C3-colors pigments inside.
Taking longer time to complete a refresh.
Spectra 4Zero aboveblack, white, red, yellow
0°C to +40°C-25°C to +60°CNew generation of color display upgraded by BWR to provide additional yellow.

How to make your selection?

–Refresh cycle

  • Note that EPDs are suitable for refresh cycles (global update, full screen update) from tens of seconds to minutes.
  • Fast update rate (partial update – few hundred milliseconds) is feasible but please share your requirements with us for further support.
  • An EPD is more suitable for applications where a static image is maintained without electricity and doesn’t need to be refreshed frequently.

–Temperature & colors

  • Determine whether the operating temperature or color is the primary requirement for your product or use case.
  • If having red or yellow as one of the EPD colors is a primary requirement, note that Spectra EPDs cannot be operated at sub-zero temperatures.
  • If you need your product to operate under 0℃, wide-temperature EPD (black and white) will be the only suitable model.  Selecting Freezer if your case needs down to -25℃.
  • We recommend selecting Wide Temperature if it is not essential that you have a three- or four-colors display.


Driver comparison of iTC and eTC

Driver type
iTC (internal timing controller)
eTC (external timing controller)
EPD with host board
EPD with host board
Waveform location
iTC waveform
eTC waveform
Driving waveformEmbedded in driver IC (CoG)Controlled by MCU
Customization / Design flexibility
Design-in effortEasierNormal
Power consumptionNormalLower

  • The driving waveforms (LUTs, lookup tables) have been pre-programmed in the driver IC. Developers just need to send image data and update command to complete the screen refresh.

  • If developers need special support to change the waveforms, extra LUTs can be sent externally.

  • Following our driving guide, developers can fully control the driving flow and stage from the MCU.

  • Developers need to send converted image data at each specific stage.

  • Taking longer time to design-in.

  • Longer initial, power-up and power-off periods. (500ms above)

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