Pervasive Displays e-Paper BWRY Screens

After the monochrome black and white and the colour screens with red, Pervasive Displays has launched new e-paper screens featuring four colours black-white-red-yellow.

  • iTC 1.54" BWRY screen with 152 x 152 pixels
  • iTC 2.13" BWRY screen with 212 x 104 pixels
  • iTC 2.66" BWRY screen with 296 x 152 pixels

The screens connect through the the same 24 flat connector to the same EXT3-1 driving board, and use the same PDLS library.

​The screens were sampled by Pervasive Displays.

Hardware

The four basic colours can be combined to obtain six additional colours, thanks to the high density up to 140 dpi.
  • Grey: one pixel black, another pixel white;
  • Light red: one pixel red, another pixel white;
  • Light yellow: one pixel yellow, another pixel white;
  • Dark red: one pixel red, another pixel black;
  • Dark yellow: one pixel yellow, another pixel black;
  • Orange: one pixel red, another pixel yellow.

High contrasts between colours make the screens ideal for high-impact messages.

Software

A specific variant of the PDLS library, PDLS_EXT3_Basic_BWRY, manages the BWRY screens.

The colours are coded on two bits, so the size of the frame-buffer remains unchanged compared to the monochrome and the black-white-red screens.

​Updating the screens uses the global mode and takes 21 s, slightly faster than the 24 s required by the black-white-red version of the same 2.66" size.

Conclusion

The black-white-red-yellow screens add a fourth colour, a vibrant yellow to the deep black and saturated red.

This is perfect for incremental levels of messages: information in black, warning in yellow and danger in red.

This full hardware and software compatibility allows an easy in-place replacement of the monochrome and black-white-red panels by a black-white-red-yellow panel. 

Pros

  • Vivid red and yellow colours
  • Same driving board
  • Same library and memory requirement

Cons

  • Screen refresh takes 21 seconds

Wrap-Up

  • Vivid red and yellow colours
  • Large choice of sizes
  • Same hardware and software

Links
Posted: 03 Jul 2023
Updated: 13 Sep 2023