% 2.7” TFT EPD Panel
% RePaper.org
% 2013



# 2.7” TFT EPD Panel Product Specifications

--------------------  -------------------------
Description           2.7” TFT EPD Panel
Model Name            EM027AS012
Doc. No.              1P033-00
Revision              01
--------------------  -------------------------


# General Description

## Overview

This is a 2.7” a-Si, active matrix TFT, Electronic Paper Display (EPD)
panel. The panel has such high resolution (117 dpi) that it is able to
easily display fine patterns. Due to its bi-stable nature, the EPD panel
requires very little power to update and needs no power to maintain an
image.


## Features

* a-Si TFT active matrix Electronic Paper Display(EPD)
* Resolution: 264 x 176
* Ultra low power consumption
* Super Wide Viewing Angle - near 180°
* Extra thin & light
* SPI interface
* RoHS compliant

## 1.3 Applications

* Electronic shelf label (ESL)
* Reusable container
* Badge


## General Specifications

-------------------------------------------------------------
Item               Specification                  Unit   Note
-----------------  -----------------------------  -----  ----
Outline Dimension  70.42(H) x 45.80(V) x 1.00(T)  mm     (1)

Active Area        57.288(H) x 38.192(V)          mm

Driver Element     a-Si TFT active matrix         -

FPL                V110                           -

Pixel Number       264 x 176                      pixel

Pixel Pitch        0.217 x 0.217 (117dpi)         mm

Pixel Arrangement  Vertical stripe                -

Display Colors     Black/White                    -

Surface Treatment  Anti-Glare                     -

-------------------------------------------------------------


Note (1): Not including the FPC.


## Mechanical Specifications

----------------------------------------------------------
Item                       Min.   Typ.   Max.   Unit  Note
----------  -------------  -----  -----  -----  ----  ----
Glass Size  Horizontal(H)  70.12  70.42  70.72  mm

            Vertical(V)    45.50  45.80  46.10  mm

            Thickness(T)   0.80   1.00   1.20   mm    (1)

Weight                     -      6.30   7.7    g

----------------------------------------------------------

Note (1): Not including the Masking Film.


## FPC Specification

-----------------------------------------------------------------------------
Item           Pin numbers  Pitch (mm)  Connector                        Note
-------------  -----------  ----------  -------------------------------  ----
Golden Finger  40           0.5         STARCONN 089H40 or Compatible

-----------------------------------------------------------------------------


![EPD Drawing](images/em027as012/epd_drawing.svg)


# Absolute Maximum Ratings

## Absolute Ratings of Environment

------------------------------------------------------------------
Item                           Symbol  Value        Unit  Note
-----------------------------  ------  -----  ----  ----  --------
                                       Min.   Max.

Storage Temperature            T~ST~   -20    +60   ºC    (1)

Operating Ambient Temperature  T~OP~   0      +50   ºC    (1), (2)

------------------------------------------------------------------

Note (1):

​* 90 %RH Max. (Ta ≦ 40 ºC), where Ta is ambient temperature.

​* Wet-bulb temperature should be 39 ºC Max. (Ta > 40 ºC).
* No condensation.

Note (2): The temperature of panel display surface area should be 0 ºC
Min. and 50 ºC Max. Refresh time depends on operation temperature.

![Operating Range of Relative Humidity and Temperature](images/common/operating_range_of_relative_humidity_and_temperature.svg)


## Reliability Test Item

-------------------------------------------------------------------------------
Item                            Test Condition                         Remark
------------------------------  -------------------------------------  --------
High Temperature Operation      50 ℃ for 240h                          ​(1) (2)

High Temperature Storage        60 ℃ for 240h                          ​(1) (2)

Low Temperature Operation       0 ℃ for 240h                           ​(1) (2)

Low Temperature Storage         -20 ℃ for 240h                         ​(1) (2)

High Temperature/Humidity       40 ℃ / 90 %RH for 168h                 ​(1) (2)
Operation

High Temperature/Humidity       50 ℃ / 80 %RH for 168h                 ​(1) (2)
Storage

Thermal Cycles (Non-operation)  1 Cycle:-20℃/30min → 60℃/30min, for    ​(1) (2)
                                100 Cycles

Package Drop Test               Drop from 97cm. (ISTA)                 ​(1) (2)
                                1 corner, 3 edges, 6 sides. One drop
                                for each.

Package Random Vibration Test   1.15Grms, 1Hz \~ 200Hz. (ISTA)         ​(1) (2)

-------------------------------------------------------------------------------


Note (1): End of test, function, mechanical, and optical shall be
satisfied.

Note (2): The test result and judgment are based on PDI’s 1bit driving
waveform, driving fixture and driving system.


# Electrical Characteristics

## Absolute Maximum Ratings of Panel

----------------------------------------------------------------
Parameter      Symbol  Value       Unit  Note
-------------  ------  -----  ---  ----  -----------------------
                       Min    Max

Digital Power  V~DD~   -0.3   5.0  V

Analog Power   V~CC~   -0.3   5.0  V

Ground         V~SS~   -           -     Connect V~SS~ to Ground

----------------------------------------------------------------

Ta = 25 ± 2 ºC


## Recommended Operation Conditions of Panel

-------------------------------------------------------------------------------
Parameter           Symbol       Value                    Unit  Note
------------  ----  -----------  --------  ---  --------  ----  ---------------
                                 Min       Typ  Max

Digital             V~DD~        2.7       3.0  3.3       V
Power

Analog Power        V~CC~        2.7       3.0  3.3       V

Input         High  V~IH~        0.8V~DD~  -    V~DD~     V     /CS, ID, SCLK,
Voltage                                                         SI, /RESET

              Low   V~IL~        V~SS~     -    0.2V~DD~  V

Output        High  V~OH~        0.8V~DD~  -    V~DD~     V     I~OH~=0.5mA,
Voltage                                                         SO, BUSY

              Low   V~OL~        V~SS~     -    0.2V~DD~  V     I~OL~=-0.5mA,
                                                                SO, BUSY

Input         High  I~IH~        -         -    1.0       uA
Leakage
Current

              Low   I~IL~        -         -    -1.0      uA

Input               I~DD~+I~CC~  -         8    -         mA    (1),(2)
Current                                                         not include
                                                                inrush current

DC/DC Inrush        I~PEAK~      -         40   -         mA    (1),(2)
Current

-------------------------------------------------------------------------------

Ta = 25 ± 2 ºC

Note (1):

![Test Pattern of Panel](images/em027as012/test_pattern_of_panel.bmp)

These currents are tested with PDI test jig.

Note (2):

V~DD~=V~CC~=3.0V

![Image Update Current Profile](images/common/image_update_current_profile.svg)

The “Time of DC/DC ON” which contains the some current peak of
V~GH~/V~DH~/V~GL~/V~DL~/V~COM~.

# Application Circuit Block Diagram

![Application Circuit Block Diagram](images/common/application_circuit_block_diagram.svg)


# Terminal Pin Assignment & Reference Circuit

## Terminal Pin Assignment

-------------------------------------------------------------------------------
No.  Signal          Type  Connected to          Function
---  --------------  ----  --------------------  ------------------------------
1    /CS             I     MCU                   Chip Select. Low enable

2    BUSY            O     MCU                   When BUSY = High, EPD stays in
                                                 busy state that EPD ignores
                                                 any input
                                                 data from SPI.

3    ID              I     Ground                Set SPI interface.

4    SCLK            I     MCU                   Clock for SPI

5    SI              I     MCU                   Serial input from host MCU to
                                                 EPD

6    SO              O     MCU                   Serial output from EPD to host
                                                 MCU

7    /RESET          I     MCU                   Reset signal. Low enable

8    ADC\_IN         -     -                     Not connected

9    V~CL~           C     Capacitor             -

10   C42P            C     Charge-Pump           -
                           Capacitor

11   C42M            C                           -

12   C41P            C     Charge-Pump           -
                           Capacitor

13   C41M            C                           -

14   C31M            C     Charge-Pump           -
                           Capacitor

15   C31P            C                           -

16   C21M            C     Charge-Pump           -
                           Capacitor

17   C21P            C                           -

18   C16M            C     Charge-Pump           -
                           Capacitor

19   C16P            C                           -

20   C15M            C     Charge-Pump           -
                           Capacitor

21   C15P            C                           -

22   C14M            C     Charge-Pump           -
                           Capacitor

23   C14P            C                           -

24   C13M            C     Charge-Pump           -
                           Capacitor

25   C13P            C                           -

26   C12M            C     Charge-Pump           -
                           Capacitor

27   C12P            C                           -

28   C11M            C     Charge-Pump           -
                           Capacitor

29   C11P            C                           -

30   V~COM\_DRIVER~  RC    Resistor & Capacitor  The signal duty cycle can
                                                 drive V~COM~ voltage from
                                                 source driver IC.

31   V~CC~           P     V~CC~                 Power supply for analog part
                                                 of source driver.

32   V~DD~           P     V~DD~                 Power supply for digital part
                                                 of source driver.

33   V~SS~           P     Ground                -

34   V~GH~           C     Capacitor             -

35   V~GL~           C     Capacitor             -

36   V~DH~           C     Capacitor             -

37   V~DL~           C     Capacitor             -

38   BORDER          I     -                     Connect to V~DL~ via control
                                                 circuit for white frame border

39   V~ST~           P     V~COM\_PANEL~         -

40   V~COM\_PANEL~   C     Capacitor             V~COM~ to panel

-------------------------------------------------------------------------------


Note:

Type: I: Input

O: Output
C: Capacitor
RC: Resistor and Capacitor
P: Power

## Reference Circuit


![EPD Reference Circuit](images/common/epd_reference_circuit.svg)

Note: (1) V~DD~ and V~CC~ must be discharged promptly after power off.


# Optical Characteristics

## Optical Test Conditions

----------------------------------------------
Item                 Symbol        Value  Unit
-------------------  ------------  -----  ----
Ambient Temperature  Ta            25±2   ºC

Ambient Humidity     Ha            50±10  %RH

Supply Voltage       V~CC~& V~DD~  3.0    V

----------------------------------------------

## Optical Specifications

## Optical Measurement with D65 light source

--------------------------------------------------------------------------------
Item                Symbol  Rating               Unit  Note
------------------  ------  ------  -----  ----  ----  -------------------------
                            Min.    Typ.   Max.

Contrast ratio      CR      5:1     7:1    -     -     θx=θy=0
                                                       (1),(2),(3),(4)

Refresh time        Tr      -       3      -     sec   (3)

White Chromaticity  Wx      -       0.313  -     -     θx=θy=0
                                                       (1),(4)

                    Wy      -       0.338  -

Reflectance         R%      25      32     -     %     (1),(4)

--------------------------------------------------------------------------------

Note (1): Panel is driven by PDI waveform without masking film and
optical measurement by CM-700D with D65 light source and SCE mode.

![Optical measurement](images/common/optical_measurement.svg)

Note (2): Definition of Viewing Angle (qx, qy):

![Definition of Viewing Angle to Measure Contrast Ratio](images/common/definition_of_viewing_angle_to_measure_contrast_ratio.svg)

Note (3): Refresh time is the time that e-paper particles move not
including the power on and off time. The refresh time is measured at
25ºC.The refresh time and contrast ratio varies due to different films,
display performance requirements, and ambient temperatures.

Note (4): Contrast ratio (C.R.): The Contrast ratio is calculated by the
following expression. C.R. =(R% White) / (R% Black). Reflectance is
measured at 120 seconds after refresh.

# include ghosting

# include precautions


# Definition of Labels

![Model Labels](images/em027as012/model_labels.svg)

![Definition of Model Labels](images/common/definition_of_model_labels.svg)

![Carton Label](images/common/carton_label.svg)

![Pallet Label](images/common/pallet_label.svg)

-----

# include glossary

-----

# include copyright

