Display Elektronik GmbH
TFT MODULE
DEM 7201280A
VMH-PW-N (C-TOUCH)
5“ TFT + PCT
Product Specification
Ver.: 0
28.11.2017
DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
Revision History
VERSION
DATE
0
28.11.2017
Version: 0
REVISED PAGE NO.
Note
First Issue
PAGE: 2
DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
Contents
1. Summary
2. General Specification
3. Interface
4. Counter Drawing
5. Absolute Maximum Ratings
6. Electrical Characteristics
7. DC Characteristics
8. AC Characteristics
9. Power ON/OFF Sequence
10. Optical Characteristics
11. Reliability
12. Touch Panel Information
Version: 0
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
1. Summary
This 5.0” TFT is a color active matrix thin film transistor (IPS) liquid crystal display (LCD) that
uses amorphous silicon TFT as a switching device. This TFT LCD has a 4.99 (16:9) inch
diagonally measured active display area with HD (720 horizontal by 1280 vertical pixel)
resolution. This module is a composed of a TFT_LCD module and follows RoHS.
2. General Specifications
n
Size: 5.0 Inch
n
Dot Matrix: 720 x RGB x 1280 Dots
n
Module Dimension: 73.30 x 127.60 x 3.45 mm
n
Active Area: 62.10 x 110.40 mm
n
Dot Pitch: 0.08625 x 0.08625 mm
n
LCD Type: IPS TFT, Normally Black, Transmissive
n
Viewing Angle: 80/80/80/80
n
Aspect Ratio: 16:9
n
Backlight Type: LED ,Normally White
n
Brightness: 200cd/m2 (in front of the touch)
n
CTP IC: GT928 (Goodix)
n
With / Without TP: With Capacitive Touch and I2C-Interface
n
Surface: Glare
*Color tone slight changed by temperature and driving voltage.
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
3. Interface
3.1. LCM PIN Definition
Pin
1
2
3
4
5
6
7
8
9
Symbol
NC
NC
NC
NC
NC
NC
NC
NC
NC
10-11
VCI
12-13
NC
14
RESET
15
TE
16
17-18
NC
GND
19-20
IOVCC
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36-37
38
39
40
GND
D3P
D3N
GND
D2P
D2N
GND
CLKP
CLKN
GND
D1P
D1N
GND
D0P
D0N
GND
LED+
LED1LED2-
Version: 0
Function
No connection
No connection
No connection
No connection
No connection
No connection
No connection
No connection
No connection
Power supply for analog circuits. Connect to an
external power supply of 2.5V to 3.6V
No connection
The external reset input
Initializes the chip with a low input. Be sure to execute a
power-on reset after supplying power.
Fix to VDDI level when not in use.
Tearing effect output pin.
Leave the pin open when not in use.
No connection
Power ground
Power supply for analog circuits. Connect to an
external power supply of 1.65V to 3.6V
Power ground
Remark
MIPI DSI differential data pair. (Data lane 3)
Power ground
MIPI DSI differential data pair. (Data lane 2)
Power ground
MIPI DSI differential clock pair
Power ground
MIPI DSI differential data pair. (Data lane 1)
Power ground
MIPI DSI differential data pair. (Data lane 0)
Power ground
Power for LED backlight anode
Power for LED1 backlight cathode
Power for LED2 backlight cathode
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DEM 7201280A VMH-PW-N (C-TOUCH)
3.2. CTP PIN Definition
Production Specification
Pin
Symbol
1
SDA
I2C data input and output
2
SCL
I2C clock input
3
RST
External Reset, Low is active
4
INT
External interrupt to the host
5
VDD
Power Supply : +3.3V
6
GND
Ground for analog circuit
Version: 0
Function
Remark
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
4. Counter Drawing
Version: 0
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
5. Absolute Maximum Ratings
Item
Symbol
Min
Typ
Max
Unit
Operating Temperature
TOP
-20
-
+70
°C
Storage Temperature
TST
-30
-
+80
°C
Note: Device is subject to be damaged permanently if stresses beyond those absolute
maximum ratings listed above
1.
Temp. ≦60°C, 90% RH MAX. Temp.>60°C,
Absolute Humidity shall be less than 90% RH at 60°C
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
6. Electrical Characteristics
6.1. Typical Operation Conditions
Item
Power Supply for Analog
Circuit
Power Supply for Logic
Circuit
Supply Voltage for Touch
Logic
Symbol
Values
Unit
Min.
Typ.
Max.
VCI
2.5
3.3
3.6
V
IOVCC
1.65
1.8
3.6
V
VDDT
2.8
-
3.3
V
IDD
-
44
-
mA
Current for Driver
6.2. Backlight Driving Conditions
Parameter
Symbol
LED Current
ILED
LED Voltage
VLED+
LED Lifetime
Remark
VDD=3.3V
Note1
Min.
Typ.
Max.
Unit
Remark
-
40
-
mA
19.6
-
23.8
V
Note 1
30,000
-
-
Hr
Note 2,3,4
Note 1: There are 1 Groups LED
1
3
5
7
9
11 13
LED+
2
4
6
8
10 12 14
LED1LED2-
Note 2: Ta = 25°C
Note 3: Brightness to be decreased to 50% of the initial value
Note 4: The single LED lamp case7.3.
Version: 0
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
7. DC CHARATERISTICS
7.1. Basic Characteristics for Panel Driving
Rating
Parameter
Symbol
Min
Typ
Logic Low Level
Input Voltage
Logic High Level
Input Voltage
Logic Low Level
Output Voltage (TE)
Logic High Level
Output Voltage (TE)
Max
Unit
Condition
Note
VIL
-0.3
-
0.3*IOVCC
V
Note1
VIH
0.7*IOVCC
-
IOVCC
V
Note1
VOL
0
0.2*IOVCC
V
IOL= +1.0mA
Note1
VOH
0.8*IOVCC
IOVCC
V
IOH= -1.0mA
Note1
NOTE1:
Ta = -20°C to 70°C, VCI = 2.5V to 3.6V, IOVCC = 1.65V to 3.6V
7.2. DSI DC Characteristics
LP Mode
Spike/Glitch Rejection
Version: 0
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
High Speed Mode
Version: 0
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DEM 7201280A VMH-PW-N (C-TOUCH)
Version: 0
Production Specification
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
8. AC Characteristics
8.1. DSI Interface Timing Characteristics
8.1.1 High Speed Mode – Clock Channel Timing
Notes:
1. UI = UIINSTA = UIINSTB
8.1.2 High Speed Mode – Data Clock Channel Timing
Version: 0
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
8.1.3 High Speed Mode – Rising and Falling Timings
Version: 0
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
8.1.4 Low Power Mode – Bus Turn Around
BTA from the MCU to Display Module
BTA from Display Module to the MCU
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
8.1.5 Data Lanes from Low Power Mode to High Speed Mode
8.1.6 Data Lanes from High Speed Mode to Low Power Mode
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
8.1.7 Clock Lanes High Speed Mode to/from Low Power Mode Timing
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
8.2. Reset Timing
Signal
RESX
Symbol
Parameter
tRW
Reset pulse duration
tRT
Reset cancel
Min
Max
10
Unit
us
5 (Note 1, 5)
120 (Note 1, 6, 7)
ms
Notes:
1. The reset cancel includes also required time for loading ID bytes, VCOM setting and other settings from NVM
(or similar device) to registers. This loading is done every time when there is HW reset cancel time (tRT) within 5
ms after a rising edge of RESX.
2. Spike due to an electrostatic discharge on RESX line does not cause irregular system reset according to the
table below:
3. During the Resetting period, the display will be blanked (The display is entering blanking sequence, which
maximum time is 120 ms, when Reset Starts in Sleep Out –mode. The display remains the blank state in Sleep In
–mode.) and then return to Default condition for Hardware Reset.
4. Spike Rejection also applies during a valid reset pulse as shown below:
5. When Reset applied during Sleep In Mode.
6. When Reset applied during Sleep Out Mode.
7. It is necessary to wait 5msec after releasing RESX before sending commands. Also Sleep Out command
cannot be sent for 120msec.
Version: 0
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
9. Power ON/OFF Sequence
Case A:
Case B:
Version: 0
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
10. Optical Characteristics
Item
Symbol
Response Time
Tr
Tf
Contrast Ratio
CR
Color
Wx
Chromaticity
White
Hor.
Viewing
Angle
Brightness
Ver.
Wy
Condition.
θ=0°、Φ=0°
ΦT
Typ.
Max.
Unit
-
10
15
.ms
-
20
25
.ms
640
800
-
-
At optimized
viewing angle
θ=0°、Φ=0
ΘR
ΘL
Min
CR≧10
ΦB
-
-
-
80
-
-
80
-
200
-
-
Note 3,5
Note 4,5
Note 2,6,7
0.283 0.303 0.323
0.303 0.323 0.343
80
80
Remark
Deg.
cd/m2
Note 1
Center of
display
Ta=25°C±2°C
Note 1: Definition of viewing angle range
Fig. 11.1. Definition of viewing angle
Note 2: Test equipment setup:
After stabilizing and leaving the panel alone at a driven temperature for 10 minutes, the
measurement should be executed. Measurement should be executed in a stable, windless,
and dark room. Optical specifications are measured by Topcon BM-7or BM-5 luminance meter
1.0° field of view at a distance of 50cm and normal direction.
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
Fig. 11.2. Optical measurement system setup
Note 3: Definition of Response time:
The response time is defined as the LCD optical switching time interval between “White” state
and “Black” state. Rise time, Tr, is the time between photo detector output intensity changed
from 90%to 10%. And fall time, Tf, is the time between photo detector output intensity changed
from 10%to 90%
D isp la y
D a ta
W h ite (T F T O F F )
B la c k (T F T O N )
W h ite ( T F T O F F )
100%
90%
10%
0%
Note 4: Definition of contrast ratio:
The contrast ratio is defined as the following expression.
Contrast ratio (CR) =
Luminance measured when LCD on the "White" state
Luminance measured when LCD on the "Black" state
Note 5: White Vi = Vi50 ± 1.5V
Black Vi = Vi50 ± 2.0V
“±” means that the analog input signal swings in phase with VCOM signal.
“±” means that the analog input signal swings out of phase with VCOM signal.
The 100% transmission is defined as the transmission of LCD panel when all the input
terminals of module are electrically opened.
Note 6: Definition of color chromaticity (CIE 1931)
Color coordinates measured at the center point of LCD
Note 7: Measured at the center area of the panel when all the input terminals of LCD panel are
electrically opened.
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
11. Reliability
Content of Reliability Test (Wide temperature, -20°C~+70°C)
Environmental Test
Test Item
High Temperature
storage
Low Temperature
storage
High Temperature
Operation
Low Temperature
Operation
High Temperature/
Humidity Operation
Thermal shock
resistance
Content of Test
Endurance test applying the high storage temperature
for a long time.
Endurance test applying the low storage temperature
for a long time.
Endurance test applying the electric stress (Voltage &
Current) and the thermal stress to the element for a
long time.
Endurance test applying the electric stress under low
temperature for a long time.
The module should be allowed to stand at
60℃,90%RH max
The sample should be allowed stand the following 10
cycles of operation
-20°C
+25°C
+70°C
Note
2
-20°C
200hrs
+60°C,90%RH
96hrs
-20°C/+70°C
10 cycles
1
1,2
——
1,2
——
30min
Vibration test
Static electricity test
5min
30min
1 cycle
Endurance test applying the vibration during
transportation and using.
Test Condition
+80°C
200hrs
-30°C
200hrs
+70°C
200hrs
Endurance test applying the electric stress to the
terminal.
Total fixed amplitude : 3
1.5mm
Vibration Frequency :
10~55Hz
One cycle 60
seconds to 3
directions of X,Y,Z for
Each 15 minutes
VS=±600V(Contact), ——
±800V(Air),
RS=330Ω
CS=150pF
10 times
Note1: No dew condensation to be observed.
Note2: The function test shall be conducted after 4 hours storage at the normal
Temperature and humidity after remove from the test chamber.
Note3: The packing have to including into the vibration testing.
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
12. Touch Panel Information
12.1. I2C Communication
GT928 provides standard I2C interface for communication. In the system, GT928 always
works in slave mode, all communications are initiated by master, and the baud rate can be up
to 400K bps. The definition of I2C timing is as following:
Test condition1: 1.8V communication interface, 400Kbps, pull up resistor is 2K ohm
Parameter
Symbol
Min.
Max.
Unit
SCL low period
Tlo
0.9
-
us
SCL high period
Thi
0.8
-
us
SCL setup time for START condition
tst1
0.4
-
us
SCL setup time for STOP condition
tst3
0.4
-
us
SCL hold time for START condition
thd1
0.3
-
us
SDA setup time
tst2
0.4
-
us
SDA hold time
thd2
0.4
-
us
Test condition2: 3.3V communication interface, 400Kbps, pull up resistor is 2K ohm
Parameter
Symbol
Min.
Max.
Unit
SCL low period
Tlo
0.9
-
us
SCL high period
Thi
0.8
-
us
SCL setup time for START condition
tst1
0.4
-
us
SCL setup time for STOP condition
tst3
0.4
-
us
SCL hold time for START condition
thd1
0.3
-
us
SDA setup time
tst2
0.4
-
us
SDA hold time
thd2
0.4
-
us
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
GT928 has 2 sets of slave address 0xBA/0xBB & 0x28/29. Master can control Reset & INT pin
to configure the slave address in power on initial state like following :
Power on diagram:
Timing of setting slave address to 0x28/0x29:
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
Timing of setting slave address to 0xBA/0xBB:
a) Data Transmission
(eg. slave address is 0xBA/0xBB)
Communication is always initiated by master, A high-to-low transition of SDA with SCL high is a
start condition.
All addressing signal are serially transmitted to and from on bus in 8-bit word. GT928 sends a
“0” to acknowledge when the addressing word is 0xBA/BB( or 0x28/0x29 ). This happens
during the ninth clock cycle. If the slave address is not matched, GT928 will stay in idle state.
The data words are serially transmitted to and from in 9-bit information: 8-bit data + 1-bit ACK
or NACK sent by GT928. Data changes during SCL low periods and keep valid during SCL
high.
A low-to-high transition of SDA with SCL high is a stop condition.
b) Write Data to GT928
(eg. slave address is 0xBA/0xBB)
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DEM 7201280A VMH-PW-N (C-TOUCH)
Production Specification
Write operations
Please check the above figure, master start the communication first, and then sends device
address 0XBA preparing for a write operation.
After receiving ACK from GT928, master sends out 16-bit register address, and then the data
word in 8-bit, which is going to be wrote into GT928.
The address pointer of GT928 will automatically increase one after one byte writing, so master
can sequentially write in one operation. When operation finished, master stop the
communication.
c) Read Data from GT928
(eg. slave address is 0xBA/0xBB)
Read operation
Please check the above figure, master start the communication first, and then sends device
address 0xBA for a write operation.
After receiving ACK from GT928, master sends out 16-bit register address, to set the address
pointer of GT913. After receiving ACK, master produce start signal once again and send
device address 0xBB, then read data word from GT928 in 8-bit.
GT928 also supports sequential read operation, and the default setting is sequential read
mode. Master shall send out ACK after every byte reading successfully but NACK after the last
one. Then sends stop signal to finish the communication
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