E Ink display

From MobileRead
Jump to: navigation, search

Contents

[edit] E Ink Display Specifications

Updated for E Ink Vizplex imaging film. The new E Ink Pearl display increases contrast to 10:1. See also E Ink Triton‎‎ for the color display and E Ink Mobius for a flexible display.

[edit] Optical

Vizplex Pearl Carta
White State Reflectivity: 40% (typical) 70% (minimum) 74%
Dark State Reflectivity 24% (maximum) 19%
Contrast Ratio: 7:1 (typical) 10:1 (minimum) 15:1
Viewing Angle: 180° near 180° near 180°
Reflective 40.7% (minimum) 44%
Grayscale Capability: 4-bit (16 gray levels) 4-bit, 16 gray levels 4-bit
Image Update Time: 740 ms (grayscale mode)
260 ms (1-bit mode)
600 ms (grayscale)
120 ms (1 bit)
120 ms (1 bit)
Resolution 200 ppi max 200 ppi plus 300 ppi plus

In actual practice the grayscale capability is up to the controller hardware and can range from 4 levels to 16 levels in currently shipped devices.

[edit] Mechanical / Dimensional for 6" Display

Pixel Count: 800 x 600 (SVGA) 167 ppi
Pixel Size: rectangular, 151 x 153 micron
Active Area: 122.4 x 90.6 mm (4.8" x 3.6")
152.3 mm (6 inches) diagonal
Display Thickness: 1.25 mm
Display Weight: 35 g

There are other display sizes available.

13.3" (71 x 203 mm, 10.67" x 8.0") 1600 x 1200 pixels, 150 ppi
10.2" (207 x 155 mm, 8.15" x 6.1") 1280 x 1024 pixels, 158 ppi
9.7" (202.9 x 139.5 mm, 8.0" x 5.5") 1200 x 825 pixels, 150 ppi and 1600 x 1200, 200 ppi (pearl)
8.0" (162.6 x 121.9 mm, 6.4" x 4.8") 1024 x 768, 160 ppi
6.0" (122.4 x 90.6 mm, 4.8" x 3.6") 800 x 600, 167 ppi and 1024 x 768, 213 ppi (pearl)
5.0" (101.5 x 76.1 mm, 4.0" x 3.0") 800 x 600, 200 ppi

Available sizes range from 2" to 13.3" diagonal.

[edit] Environmental

Operating Temperature Range: 0 — 50 C (32 — 122 F)
Storage Temperature Range: -27 — 70 C (-17 — 158 F)

[edit] Electrical

Supply Voltage: 2.7—3.3 V DC
Power Consumption: Active update peak: 1800 mW
Active update typical: 750 mW
Standby typical: 1 mW

[edit] E Ink controllers

The current controllers

  • Apollo is the original controller and is still popular and used on many readers.
  • IRex builds their own custom controller offering 16 levels of Grayscale.
  • Marvell builds a custom controller for their line of ARM processors.

Here is a discussion of interfacing to these controllers for Linux applications.

[edit] Notes on earlier E Ink devices.

The older display technology has 4 level gray scale and slower update times of 1000 ms for gray scale and 500 ms for 1-bit mode. These were primarily 6" devices. They also had less reflectivity. This causes these devices to appear less white (light grey background) and have less contrast.

The iRex iLiad, on the other hand, uses a custom display controller that achieves 16 levels of gray scale. They are also using an 8.1" display featuring a 1024 x 768 pixel display.

See also E-paper and E Ink

[edit] Review of electronic ink

Personal tools
Namespaces

Variants
Actions
Navigation
MobileRead Networks
Toolbox
Advertisement