DT028ATFT(-TS) Specification Datasheet by Displaytech

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Efl Displaytech Ltd? a seacomp company www.dis la tech.cnm.hk
Website: www.displaytech.com.hk
LCD Module
Product Specification
Product: DT028ATFT & DT028ATFT-TS
2.8'' TFT Display Module (240RGBx320DOTS)
Contents in this document are subject to change without notice. No part of this document
may be reproduced or transmitted in any form or by any means, electronic or mechanical,
for any purpose, without the express written permission of Displaytech Ltd.
3 November 2011.
Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
1
1. REVISION RECORD
VERSION
DATE
1.0
26 April 2011
2.0
9 June 2011
2.1
3 November 2011
Table of Content
Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
2
Table of Content
1.!REVISION RECORD .......................................................................... 1!
2.!Introduction .......................................................................................... 3!
3.!General Specifications .......................................................................... 3!
4.!Mechanical Drawing ............................................................................. 4!
5.!Interface Description ............................................................................ 6!
6.!Absolute Maximum Ratings ................................................................ 8!
7.!Electrical Characteristics ..................................................................... 8!
8.!Display Controller /Power Supply Timing ......................................... 8!
9.!Backlight specification ......................................................................... 9!
10.!Optical Characteristics ......................................................................... 9!
11.!Safety Precaution ................................................................................ 12!
Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
3
2. Introduction
DT028ATFT and DT028ATFT-TS is a display module that contains a TFT display with a
320 * 240 RGB resolution. The driver used for this project is the Ilitek ILI9341 or
compatible and can display 262K colors. The driver is mounted on the glass and the
interconnection via FPC including components to drive the display module.
3. General Specifications
Item
Specification
Unit
LCD mode
Transmissive
---
Resolution
240(RGB)
Line
320
Line
Diagonal Size
2.8
Inch
Overall Size
50.00
mm
69.20
mm
Active area
43.20
mm
57.60
mm
Optimum Viewing Direction
6 o’clock
---
Driver IC
ILI9341
---
Interface type
MCU parallel / RGB (1)
---
Colours
262K
---
Operation temperature range
-20~70
°C
Storage temperature range
-30~80
°C
Remarks:
(1) Serial interface is available, but not recommendable, as the speed of it is very slow.
(2) Recommended mating connector: Hirose FH19SC-45S-0.5SH, FH12S-45S-0.5SH; or
Molex 0512964593, 0512964594; or equivalent
(3) Color tune may be changed slightly by temperature and driving voltage.
(4) RoHS compliant.
Component Life Cycle
1) Storage Life: min. 1 Year
2) Operation Life (*1): min. 43 x 10³ h (24hr/day x 7days/week x 52weeks/year x 5years)
(Not include backlight)
3) Storage and Operation Life Times are defined for a temperature of +25°C
Notes:
*1. Operation life ends when one of the listed faults occurs:
The on/off response-times reach 1.5 times of the max. value specified for a new display
The contrast is reduced to 0.5 of the original contrast value
Loss of function
The number of cosmetic defects exceeds the maximum defined
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Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
4
4. Mechanical Drawing
DT028ATFT
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Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
5
DT028ATFT-TS
7 Select lhe MCU inlerface mode DB Fm m use IMs IM2 lMi IMD MCUrImerface Mode ReglsleV/Comem GRAM an 37 I o o o 0 MC” '3‘ bus D[7 u] D[7 o] Imerlace 1 o o o 1 so MCU 16m bus D17 0] D1150] Imerface 1 so MCU 9431 b o o 1 o ‘ “5 D[7:0] D[s:o] Inlerlace 1 an , 'l o o 1 1 MC” ‘3 b' bus D[7 u] D[17 o] Inlevlace 1 0 1 0 1 g-wtte e-m data serial SBA |v1/OUT mterrace 1 D 1 1 o Arwlre arm data sevlal SDA: WOW Inlerlace 1 an Mcu 157m bus 1 D[17 m], l 0 O 0 Imevface || D[8.I] ma 1] 1 o o 1 go MCU e'b“ bus D[1710] D[17 1o] mterrace u 50 MCU 1m: t b 1 n 1 o , ' ”5 D[8|] D[17G] Imerlace u 1 o 1 I 50 MCU 9"“ bus D[17.m] D[17,e] Imevface n 1 1 D 1 erlre em data seua1 sun In Imevlace In six) om 1 1 1 0 4rwlre aabu data serial SDI: In Inlerlace 1: 590cm MPU Parallel interlace bus and serial interface select If use FIGS Inlerface musl selecl serial inlerface. “ : Fix this pin 3! VDDI or VSS.
Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
6
5. Interface Description
Pin no
Symbol
I/O
Description
1
LED A
---
Backlight anode.
2
LED K1
---
Backlight cathode K1
3
LED K2
---
Backlight cathode K2
4
LED K3
---
Backlight cathode K3
5
LED K4
---
Backlight cathode K4
6
IM0
I
7
IM1
8
IM2
9
IM3
10
FMARK
O
Tearing effect output pin to synchronize MPU to frame writing, activated by S/W
command. When this pin is not activated, this pin is low.
If not used, open this pin.
11
VSYNC
I
Frame synchronizing signal for RGB interface operation.
Fix to VDDI or VSS level when not in use.
12
HSYNC
I
Line synchronizing signal for RGB interface operation.
Fix to VDDI or VSS level when not in use.
13
DOTCLK
I
Dot clock signal for RGB interface operation.
Fix to VDDI or VSS level when not in use.
14
ENABLE
I
Data enable signal for RGB interface operation.
Fix to VDDI or VSS level when not in use.
15~32
DB17~DB0
I/O
18-bit parallel bi-directional data bus for MCU system and RGB interface mode
Fix to VSS level when not in use.
Please refer to the IM[0:3] setting.
33
CS
I
Chip select input pin (“Low” enable).
This pin can be permanently fixed “Low” in MPU interface mode only.
34
WR
I
- 8080-I / 8080-II system (WRX): Serves as a write signal and writes data at the
rising edge.
- 4-line system (D/CX): Serves as command or parameter select.
Fix to VDDI or VSS level when not in use.
Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
7
Pin no
Symbol
I/O
Description
35
RS/SCL
I
This pin is used to select “Data or Command” in the parallel interface or 4-wire 8-
bit serial data interface.
When RS = ‘1’, data is selected.
When RS = ‘0’, command is selected.
This pin is used serial interface clock in 3-wire 9-bit / 4-wire 8-bit serial data
interface.
If not used, this pin should be connected to VDDI or VSS.
36
RD
I
8080-I / 8080-II system (RDX): Serves as a read signal and MCU read data at the
rising edge.
Fix to VDDI or VSS level when not in use.
37
RESET
I
Reset pin.
38
SDO
O
Serial output signal.
The data is outputted on the falling edge of the SCL signal.
If not used, open this pin
39
SDI
I
When IM[3] : Low, Serial in/out signal.
When IM[3] : High, Serial input signal.
The data is applied on the rising edge of the SCL signal.
If not used, fix this pin at VDDI or VSS.
40
VCC
---
Power supply 2.8V
41
GND
---
Power ground 0V
42
NC / YD
---
No connection (DT028ATFT) / YD of touch screen (DT028ATFT-TS)
43
NC / XR
---
No connection (DT028ATFT) / XR of touch screen (DT028ATFT-TS)
44
NC / YU
---
No connection (DT028ATFT) / YU of touch screen (DT028ATFT-TS)
45
NC / XL
---
No connection (DT028ATFT) / XL of touch screen (DT028ATFT-TS)
Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
8
6. Absolute Maximum Ratings
(Ta=25°C)
Item
Symbol
Min.
Max.
Unit
Power supply voltage
VCC
-0.3
+ 4.6
V
Logic signal input/output
voltage
Vcc
-0.3
+ 4.6
V
Operating Temperature
TOP
-20
+70
°C
Storage Temperature
TST
-30
+80
°C
Note:
When temperature is below 0°C, the response time of liquid crystal (LC) will be slower and the
color of panel will be darker.
If module driving condition exceeds the absolute maximum ratings, permanent damaged may be
resulted. If module is driven within the absolute maximum ratings but exceeded the DC
characteristics, mal-function may be resulted.
VDD/VCC > VSS
7. Electrical Characteristics
DC Characteristics
(Vss=0V, Ta=25°C)
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
Power supply
VCC / VDD
2.5
2.8
3.3
V
Input voltage “H”
VIH
---
0.7 VCC
---
VCC
V
Input voltage “L”
VIL
---
VSS
---
0.3 VCC
V
Output voltage “H”
VOH
IOL=-1.0mA
0.8 VCC
---
VCC
V
Output voltage “L”
VOL
IOL=1.0mA
VSS
---
0.2 VCC
V
8. Display Controller /Power Supply Timing
See Display Controller Specification: Ilitek ILI9341
o V' NW 0“ I‘TFK'TT WWW ‘7
Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
9
9. Backlight specification
(Vcc=2.8V, Vss=0V, Ta=25°C)
Item
Symbol
Condition
Min
Typ
Max
Unit
Note
Supply voltage
Vf
If=80mA
2.9
3.2
3.5
V
1
Forward current
If
---
---
80
mA
2
Uniformity
ΔBp
If=80mA
80
---
---
%
Color coordination
X
0.270
---
0.315
---
Y
0.270
---
0.315
---
LED circuit diagram:
Constant current If=4x20mA=80mA; Vf=3.2V(typ)
Note:
1) The LEDs driver mode needs to be constant current mode.
2) Permanent damage to the device may occur if maximum values are exceeded. Functional operation should be
restricted to the conditions described under normal operating conditions.
10. Optical Characteristics
(Vcc=2.8V, Vss=0V, Ta=25°C)
Item
Symbol
Condition
Min
Typ
Max
Unit
Note
Brightness
Bp
θ=0º
Ф=0º
180
220
---
cd/m²
1
Uniformity
ΔBp
80
---
---
%
1, 2
Viewing Angle
θ1
(Ф=90°
or 270°)
Cr10
-70 ~ 50
deg
3
θ2
(Ф=0°
or
180°)
-70 ~ 70
Contrast ratio
Cr
θ=0º
Ф=0º
400
500
---
---
4
Response Time
Tr
---
25
30
ms
5
Tf
CIE (x,y)
Chromaticity
White
x
θ=0º
Ф=0º
0.230
0.280
0.330
---
1, 6
y
0.248
0.298
0.348
Red
x
0.580
0.630
0.680
y
0.279
0.329
0.379
Green
x
0.288
0.338
0.388
y
0.557
0.607
0.657
Blue
x
0.093
0.143
0.193
y
0.025
0.075
0.125
NTSC Ratio
S
---
65
---
%
m :I Delecter W w/e W13 5 0 Q) G) (4) @ @ gm (3 :00) mums on) 7-:270’
Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
10
Note 1:
The data are measured after LEDs are turned on for 5 minutes. LCM displays full white.
The brightness is the average value of 9 measured spots. Measurement equipment PR-705 (Φ8mm)
Measuring condition:
- Measuring surroundings: Dark room.
- Measuring temperature: Ta=25°C.
- Adjust operating voltage to get optimum contrast at the center of the display.
Measured value at the center point of LCD panel after more than 5 minutes while backlight turning on.
Note 2:
The luminance uniformity is calculated by using following formula.
ΔBp = Bp (Min.) / Bp (Max.)×100 (%)
Bp (Max.) = Maximum brightness in 9 measured spots
Bp (Min.) = Minimum brightness in 9 measured spots.
Measurement equipment PR-705 (Φ8mm)
Note 3:
The definition of viewing angle:
Refer to the graph below marked by θ and Ф
W/6
W/3
W/3
L/6
L/3
L/3
u 100% 90% 10% ‘93} as Chuniunw nmm. T: Tr
Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
11
Note 4:
The definition of contrast ratio (Test LCM using PR-705):
Contrast Ratio (CR) =
Luminance When LCD is at “White” state
Luminance When LCD is at “Black” state
(Contrast Ratio is measured in optimum common electrode voltage)
Note 5:
Definition of Response time. (Test LCD using DMS501):
The output signals of photo detector are measured when the input signals are changed from “black” to
“white” (falling time) and from “white” to “black” (rising time), respectively.
The response time is defined as the time interval between the 10% and 90% of amplitudes. Refer to figure
as below.
The definition of response time
Note 6:
Definition of Color of CIE Coordinate and NTSC Ratio.
Color gamut:
S =
area of RGB triangle
x 100%
area of NTSC triangle
Displaytech Ltd
LCD MODULE
DT028ATFT / DT028ATFT-TS
Version: 2.1
12
11. Safety Precaution
Handling precautions:
This device is susceptible to Electro-Static Discharge (ESD) damage. Observe Anti-Static precautions.
Power supply precautions:
Identify and, at all times, observe absolute maximum ratings for both logic and LC drivers. Note that
there is some variance between models.
Prevent the application of reverse polarity to VCC and GND, however briefly.
Use a clean power source free from transients. Power up conditions are occasionally joltingand may
exceed the maximum ratings of the modules.
The VCC power of the module should also supply the power to all devices that may access the display.
Dont allow the data bus to be driven when the logic supply to the module is turned off.
Operating precautions:
DO NOT plug or unplug the module when the system is powered up.
Minimize the cable length between the module and host MPU.
Operate the module within the limits of the modules temperature specifications.
Mechanical/Environmental precautions:
Improper soldering is the major cause of module difficulty. Use of flux cleaner is not recommended as
they may seep under the elastomeric connection and cause display failure.
Mount the module so that it is free from torque and mechanical stress.
Surface of the LCD panel should not be touched or scratched. The display front surface is an easily
scratched, plastic polarizer. Avoid contact and clean only when necessary with soft, absorbent cotton
dampened with petroleum benzene.
Always employ anti-static procedure while handling the module.
Prevent moisture build-up upon the module and observe the environmental constraints for storage
temperature and humidity.
Do not store in direct sunlight
If leakage of the liquid crystal material should occur, avoid contact with this material, particularly
ingestion. If the body or clothing becomes contaminated by the liquid crystal material, wash thoroughly
with water and soap

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