4DLCD-144
Datasheet
Revision 1.3
Copyright © 2023 4D Systems
Content may change at any time. Please refer to the resource centre for latest documentation.
Contents
1. General Specification
3
2. TFT LCD Display Drawing
4
3. Absolute Maximum Ratings
5
4. Electrical Characteristics
5
5. Backlight Characteristics
5
6. Electro-Optical Characteristics
6
7. Interface Descriptions
9
8. Initialisation Codes
10
8.1. ST7735 Driver IC Version
10
8.2. ST7735R Driver IC Version
12
8.3. ILI9163C Driver IC Version
13
8.4. ST7735S Driver IC Version
14
8.5. Reading Driver IC
15
9. LCD Timing Details
16
9.1. Timing Chart
16
9.2. Reset Timing
18
9.3. Power On Sequence
19
9.3.1. Case 1 - RES line is held High or Unstable by Host at Power ON
19
9.3.2. Case 2 - RES line is held Low by Host at Power ON
19
9.4. Power-off Sequence - Uncontrolled Power Off
19
10. Reliability Test
20
11. Precautions for Using LCD Modules
21
11.1. Handing Precautions
21
11.2. Storage Precautions
23
12. Revision History
4D Systems
24
DATASHEET
Page 2 of 24
4DLCD-144
General Specification
1. General Specification
4DLCD-144ST is a colour active matrix LCD module incorporating amorphous silicon TFT (Thin Film
Transistor). It is composed of a colour TFT-LCD panel, driver IC, Solder Type FPC and a back light unit.
The module display area contains 128x128 pixels. This product accords with RoHS environmental
criterion.
ITEM
CONTENTS
UNIT
LCD Type
TFT / Transmissive / Normally white
Size
1.44
Inch
Viewing Direction
12:00 (without image inversion)
O'Clock
Gray Scale
InversionDirection
6:00
O'Clock
LCD (W × H x D)
30.9 x 36.51 x 2.9
mm
Active Area (W × H)
25.5 × 26.5
mm
Dot Pitch (W × H)
0.199 × 0.207
mm
Number of Dots (Pixels)
128 (RGB) × 128
Driver IC
ST7735S
Backlight Type
1 LED
Surface Luminance
120 (typical)
Interface Type
MCU-8bit
Color Depth
262K
Pixel Arrangement
RGB Vertical Stripe
Surface Treatment
AG
Weight
4
Physical Connection Type
Solder Type FPC - 0.8mm pitch, see drawing (Solders direct to PCB, no
connector)
cd/m2
g
Part Number Details
4DLCD - 4DLCD LCD Display
144ST - 1.44 inch, 128 x 128 Resolution, Standard Model
Note
1. RoHS compliant
2. LCD weight tolerance: ± 5%.
4D Systems
DATASHEET
Page 3 of 24
4DLCD-144
TFT LCD Display Drawing
2. TFT LCD Display Drawing
4D Systems
DATASHEET
Page 4 of 24
4DLCD-144
Absolute Maximum Ratings
3. Absolute Maximum Ratings
Absolute Maximum Ratings
PARAMETER
SYMBOL
MIN
MAX
UNIT
VDD
-0.3
4.6
V
IF
-
25
mA
Operating Temperature
TOP
-20
70
°C
Storage Temperature
TST
-30
80
°C
Humidity
RH
10%
90% (Max 60°C)
RH
Supply Voltage for LCD Logic
LED forward current (each
LED)
4. Electrical Characteristics
Electrical Characteristics
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
Power Voltage
VDD
2.6
2.8
3.3
V
Input Current
(Logic)
IVDD
-
10
-
mA
Input Voltage ‘H’
Level
VIH
0.7VDD
-
VDD
V
Input Voltage ‘L’
Level
VIL
0
-
0.2VDD
V
SYMBOL
MIN
TYP
MAX
UNIT
Voltage for LED
backlight
Vl
-
2.8
3.1
V
Current for LED
backlight
Il
-
20
25
mA
LED Life Time
-
30000
-
-
Hrs
5. Backlight Characteristics
Backlight Characteristics
PARAMETER
Note
The LED life time is defined as the module brightness decrease to 50% of original brightness at Ta=25°C.
4D Systems
DATASHEET
Page 5 of 24
4DLCD-144
Electro-Optical Characteristics
6. Electro-Optical Characteristics
Electro-Optical Characteristics
ITEM
SYM
CONDITION
MIN
TYP
MAX
UNIT
REMARK
Response Time
Tr+Tf
θ=0
-
25
-
ms
see figure
Contrast Ratio
Cr
°
-
350
-
-
see figure
∅=0
75
80
-
%
see figure
Luminance
Uniformity
δ
WHITE
Surface
Luminance
Lv
20mA
-
120
-
cd/m2
see figure
Viewing Angle
Range
θ
∅ = 90°
-
35
-
deg
see figure
∅ = 270°
-
15
-
deg
∅ = 0°
-
45
-
deg
∅ = 180°
-
45
-
deg
x
0.558
0.608
0.628
y
0.296
0.316
0.336
CIE (x,y)
Cromacity
Red
Green
Blue
White
Transmittance
4D Systems
x
θ=0°
0.285
0.305
0.325
y
∅=0°
0.536
0.556
0.576
x
Ta=25
0.115
0.135
0.155
y
0.117
0.137
0.157
x
0.285
0.305
0.325
y
0.314
0.334
0.354
T
-
6
-
DATASHEET
see figure
%
Page 6 of 24
4DLCD-144
Electro-Optical Characteristics
The definition of response time
Measuring method for Contrast ratio, surface luminance, Luminance
uniformity, CIE (x, y) chromaticity
The definition of viewing angle
4D Systems
DATASHEET
Page 7 of 24
4DLCD-144
Electro-Optical Characteristics
Note
1. Contrast Ratio(CR) is defined mathematically as below, for more information see figure.
2. Surface luminance is the LCD surface from the surface with all pixels displaying white. For more
information, see figure.
3. The uniformity in surface luminance δ WHITE is determined by measuring luminance at each test
position 1 through 5, and then dividing the maximum luminance of 5 points luminance by the minimum
luminance of 5 points luminance. For more information, see figure.
4. Response time is the time required for the display to transition from white to black (Rise Time, Tr) and
from black to white (Decay Time, Tf). For additional information see Figure 1. The test equipment is the
Autronic-Melchers ConoScope series.
5. CIE (x, y) chromaticity, the x and y value is determined by measuring luminance at each test position 1
through 5, and then making the average value.
6. Viewing angle is the angle at which the contrast ratio is greater than 2. For the TFT module, the contrast
ratio is greater than 10. The angles are determined for the horizontal or x-axis and the vertical or y-axis to
the z-axis which is normal to the LCD surface. For more information, see figure.
7. For viewing angle and response time testing, the testing data is based on the Autronic-Melchers
ConoScope series. Instruments for Contrast Ratio, Surface Luminance, Luminance Uniformity, and CIE the
test data is based on TOPCONs BM-5 photodetector.
4D Systems
DATASHEET
Page 8 of 24
4DLCD-144
Interface Descriptions
7. Interface Descriptions
LCD Interface
PIN NO.
4D Systems
SYMBOL
DESCRIPTION
1
VDD
Logic Power Supply
2
GND
Logic Power GND
3
NC
Not Connected
Can tie to GND
4
TE-NC
Not Connected
Can tie to GND
5
CS
Chip select input pin (Active Low)
6
RS
Data/Command selection pin
7
RD
Read Select signal (Active Low)
8
WR
Write Select signal (Active Low)
9
RESET
LCD Reset Pin (Active Low)
10
D0
Databus Bit 0
11
NC
Not Connected
12
D0
Databus Bit 1
13
NC
Not Connected
14
D0
Databus Bit 2
15
NC
Not Connected
16
D0
Databus Bit 3
17
NC
Not Connected
18
D0
Databus Bit 4
19
NC
Not Connected
20
D0
Databus Bit 5
21
NC
Not Connected
22
D0
Databus Bit 6
23
NC
Not Connected
24
D0
Databus Bit 7
25
NC
Not Connected
26
LEDK (-)
Backlight LED Supply -ve
27
LEDA (+)
Backlight LED Supply +ve
DATASHEET
REMARK
Leave Open
Leave Open
Leave Open
Leave Open
Leave Open
Leave Open
Leave Open
Leave Open
Page 9 of 24
4DLCD-144
Initialisation Codes
8. Initialisation Codes
There are 4 versions of the 4DLCD-144, as the Driver IC has been changed over the years and new init
codes are required. ST7735, ST7735R, ST7735S and ILI9163C
8.1. ST7735 Driver IC Version
Sold approximately early 2010 (Initial batch sold only)
Value
Remarks
NVCTR1
0xD9
unique to ST7735
COLMOD
0x3a
PWCTR6
0xFC
unique to ST7735
FRMCTR1
0xB1
VCOM4L
0xFF
unique to ST7735
FRMCTR2
0xB2
SWRESET
0x01
FRMCTR3
0xB3
RDDID
0x04
INVCTR
0xB4
SLPIN
0x10
DISSET5
0xB6
SLPOUT
0x11
PWCTR1
0xC0
PTLON
0x12
PWCTR2
0xC1
DISPOFF
0x28
PWCTR3
0xC2
DISPON
0x29
PWCTR4
0xC3
CASET
0x2A
PWCTR5
0xC4
RASET
0x2B
VMCTR1
0xC5
RAMWR
0x2C
GAMCTRP1
0xE0
RAMRD
0x2E
GAMCTRN1
0xE1
PTLAR
0x30
F0new
0xF0
MADCTL
0x36
F6new
0xF6
4D Systems
Value
DATASHEET
Remarks
Page 10 of 24
4DLCD-144
ST7735 Driver IC Version
Init Code: (Command, Data1, Data2...DataN)
SWRESET,
Delay 10ms,
SLPOUT,
Delay 120ms,
VCOM4L, 0x40, 0x03, 0x1a,
NVCTR1, 0x60, 0xc7, 0x90,
Delay 200ms,
FRMCTR1, 0x04, 0x25, 0x18,
FRMCTR2, 0x04, 0x25, 0x18,
FRMCTR3, 0x04, 0x25, 0x18, 0x04, 0x25, 0x18,
INVCTR, 0x03,
DISSET5, 0x15, 0x02,
PWCTR1, 0x02, 0x70,
PWCTR2, 0x07,
PWCTR3, 0x01, 0x01,
PWCTR4, 0x02, 0x07,
PWCTR5, 0x02, 0x04,
PWCTR6, 0x11, 0x17,
VMCTR1, 0x3c, 0x4f,
MADCTL, 0xc8,
COLMOD, 0x05,
GAMCTRP1, 0x08, 0x19, 0x16, 0x36, 0x38, 0x2d, 0x25, 0x2a, 0x28, 0x26, 0x33, 0x3d, 0x04, 0x06,
0x03, 0x0e,
GAMCTRN1, 0x09, 0x1f, 0x17, 0x36, 0x37, 0x33, 0x2c, 0x32, 0x2f, 0x2c, 0x33, 0x3c, 0x06, 0x06,
0x03, 0x0f,
DISPON,
Delay 10ms,
RAMWR
4D Systems
DATASHEET
Page 11 of 24
4DLCD-144
ST7735R Driver IC Version
8.2. ST7735R Driver IC Version
Sold approximately 2011 to 2013
Value
Value
Value
SWRESET
0x01
RAMRD
0x2E
PWCTR2
0xC1
RDDID
0x04
PTLAR
0x30
PWCTR3
0xC2
SLPIN
0x10
MADCTL
0x36
PWCTR4
0xC3
SLPOUT
0x11
COLMOD
0x3a
PWCTR5
0xC4
PTLON
0x12
FRMCTR1
0xB1
VMCTR1
0xC5
DISPOFF
0x28
FRMCTR2
0xB2
GAMCTRP1
0xE0
DISPON
0x29
FRMCTR3
0xB3
GAMCTRN1
0xE1
CASET
0x2A
INVCTR
0xB4
F0new
0xF0
RASET
0x2B
DISSET5
0xB6
F6new
0xF6
RAMWR
0x2C
PWCTR1
0xC0
Init Code: (Command, Data1, ... DataN)
SWRESET,
delay 10ms,
SLPOUT, //Sleep Out
delay 120ms,
FRMCTR1, 0x02, 0x35, 0x36, //Setup Frame Rate Control (In
FRMCTR2, 0x02, 0x35, 0x36, //Setup Frame Rate Control (In
FRMCTR3, 0x02, 0x35, 0x36, 0x02, 0x35, 0x36, //Frame Rate
INVCTR, 0x07,
DISSET5, 0xB4, 0xF0,
PWCTR1, 0xA2, 0x02, 0x84,
PWCTR2, 0xC5,
PWCTR3, 0x0A, 0x00,
PWCTR4, 0x8A, 0x2A,
PWCTR5, 0x8A, 0xEE,
VMCTR1, 0x06,
MADCTL, 0xC8,
GAMCTRP1, 0x12, 0x1C, 0x10, 0x18, 0x33, 0x2C, 0x25, 0x28,
0x03, 0x10,
GAMCTRN1, 0x12, 0x1C, 0x10, 0x18, 0x2D, 0x28, 0x23, 0x28,
0x03, 0x10,
F0new, 0X01,
F6new, 0X00,
COLMOD, 0X05,
CASET, 0x00, 0x02, 0x00, 0x81,
RASET, 0x00, 0x03, 0x00, 0x82,
DISPON,
delay 10ms,
RAMWR
4D Systems
DATASHEET
Normal Mode/ Full Colours)
Idle Mode/ 8-Colors)
Control (Partial Mode/ Full Colours)
0x28, 0x27, 0x2F, 0x3C, 0x00, 0x03,
0x28, 0x26, 0x2F, 0x3B, 0x00, 0x03,
Page 12 of 24
4DLCD-144
ILI9163C Driver IC Version
8.3. ILI9163C Driver IC Version
Sold approximately 2013 to late 2019
Value
Value
SWRESET
0x01
FRMCTR1
0xB1
SLPOUT
0x11
SDDC
0xB7
GAMMASET
0x26
PWCTR1
0xC0
DISPOFF
0x28
PWCTR2
0xC1
DISPON
0x29
VMCTR1
0xC5
CASET
0x2A
VOC
0xC7
RASET
0x2B
GAMCTRP1
0xE0
RAMWR
0x2C
GAMCTRN1
0xE1
RAMRD
0x2E
UNDOC
0xEC
MADCTL
0x36
GRSEL
0xF2
IPF
0x3A
Init Code: (Command, Data1, ... DataN)
SWRESET,
delay 10ms,
DISPON,
delay 100ms,
SLPOUT,
delay 20ms,
GAMMASET, 0x04,
FRMCTR1, 0x0B, 0x14,
PWCTR1, 0x10, 0x00,
PWCTR2, 0x03,
VMCTR1, 0x46, 0x40,
VOC, 0xBD,
UNDOC, 0x0C,
IPF, 0x05,
CASET, 0x00, 0x00, 0x00, 0x7F,
PASET, 0x00, 0x00, 0x00, 0x7F,
MADCTL, 0xC8,
SDDC, 0x00,
GRSEL, 0x01,
GAMCTRP1, 0x3F, 0x29, 0x27, 0x2C, 0x27, 0x0C, 0x54, 0xC7, 0x40, 0x19, 0x17, 0x1E, 0x02, 0x01,
0x00,
GAMCTRN1, 0x00, 0x16, 0x18, 0x13, 0x18, 0x13, 0x2B, 0x38, 0x3F, 0x06, 0x18, 0x21, 0x3D, 0x3E,
0x3F,
DISPON
4D Systems
DATASHEET
Page 13 of 24
4DLCD-144
ST7735S Driver IC Version
8.4. ST7735S Driver IC Version
Sold approximately late 2019 to present
Value
Value
Value
SWRESET
0x01
RAMRD
0x2E
PWCTR2
0xC1
RDDID
0x04
PTLAR
0x30
PWCTR3
0xC2
SLPIN
0x10
MADCTL
0x36
PWCTR4
0xC3
SLPOUT
0x11
COLMOD
0x3a
PWCTR5
0xC4
PTLON
0x12
FRMCTR1
0xB1
VMCTR1
0xC5
DISPOFF
0x28
FRMCTR2
0xB2
GAMCTRP1
0xE0
DISPON
0x29
FRMCTR3
0xB3
GAMCTRN1
0xE1
CASET
0x2A
INVCTR
0xB4
F0new
0xF0
RASET
0x2B
DISSET5
0xB6
F6new
0xF6
RAMWR
0x2C
PWCTR1
0xC0
Init Code: (Command, Data1, ... DataN)
SWRESET,
delay 10ms,
SLPOUT, //Sleep Out
delay 120ms,
FRMCTR1, 0x02, 0x35, 0x36, //Setup Frame Rate Control (In
FRMCTR2, 0x02, 0x35, 0x36, //Setup Frame Rate Control (In
FRMCTR3, 0x02, 0x35, 0x36, 0x02, 0x35, 0x36, //Frame Rate
INVCTR, 0x07,
DISSET5, 0xB4, 0xF0,
PWCTR1, 0xA2, 0x02, 0x84,
PWCTR2, 0xC5,
PWCTR3, 0x0A, 0x00,
PWCTR4, 0x8A, 0x2A,
PWCTR5, 0x8A, 0xEE,
VMCTR1, 0x06,
MADCTL, 0xC8,
GAMCTRP1, 0x12, 0x1C, 0x10, 0x18, 0x33, 0x2C, 0x25, 0x28,
0x03, 0x10,
GAMCTRN1, 0x12, 0x1C, 0x10, 0x18, 0x2D, 0x28, 0x23, 0x28,
0x03, 0x10,
F0new, 0X01,
F6new, 0X00,
COLMOD, 0X05,
CASET, 0x00, 0x02, 0x00, 0x81,
RASET, 0x00, 0x03, 0x00, 0x82,
DISPON,
delay 10ms,
RAMWR
4D Systems
DATASHEET
Normal Mode/ Full Colours)
Idle Mode/ 8-Colors)
Control (Partial Mode/ Full Colours)
0x28, 0x27, 0x2F, 0x3C, 0x00, 0x03,
0x28, 0x26, 0x2F, 0x3B, 0x00, 0x03,
Page 14 of 24
4DLCD-144
Reading Driver IC
8.5. Reading Driver IC
The following application (written in 4DGL for 4D Systems Processors) can be used to identify which
driver IC is used. This program can be ported to another language if not using a 4D Processor.
Essentially it reads 3 bytes from the display at a specified address, and those 3 bytes dictate which
driver IC is being used.
#platform "GOLDELOX"
#inherit
"4DGL_16bitColours.fnc"
#constant RDDID 0x04
func main()
var ID1, ID2, ID3, msg ;
disp_WriteControl(RDDID);
disp_ReadByte(); // dummy read
ID1 := disp_ReadByte();
ID2 := disp_ReadByte();
ID3 := disp_ReadByte();
gfx_MoveTo(0,0);
gfx_Rectangle(0, 0, peekB(SYS_X_MAX), peekB(SYS_Y_MAX), BLUE) ;
// decide which device
if (ID1 == 0x5C && ID2 == 0x88
msg := "ST7735" ;
else if (ID1 == 0x5C && ID2 ==
msg := "ST7735R" ;
else if (ID1 == 0x7C && ID2 ==
msg := "ST7735S" ;
else if (ID1 == 0x54 && ID2 ==
msg := "ILI9163C" ;
else
msg := 0 ;
endif
&& ID3 == 0x35)
// "ST7735"
0x89 && ID3 == 0xF0) // "ST7735R"
0x89 && ID3 == 0xF0) // "ST7735S"
0x80 && ID3 == 0x66) // "ILI9163C"
gfx_MoveTo(10, 10);
if (msg == 0)
print("Unknown Driver IC,\nID bytes:-\n");
print([HEX2]ID1, " " , [HEX2]ID2, " " , [HEX2]ID3);
to (COM0); print("Unknown Driver IC, ID bytes:- ");
to (COM0); print([HEX2]ID1, " " , [HEX2]ID2, " " , [HEX2]ID3, "\n") ;
else
print("Driver IC is\n", [STR] msg) ;
to (COM0); print("Driver IC is ", [STR] msg, "\n") ;
endif
repeat forever
endfunc
4D Systems
DATASHEET
Page 15 of 24
4DLCD-144
LCD Timing Details
9. LCD Timing Details
9.1. Timing Chart
SIGNAL
DCX
CSX
WRX
4D Systems
SYMBOL
PARAMETER
MIN
MAX
UNIT
DESCRIPTION
tast
Address setup time
10
-
ns
-
taht
Address hold time
(Write/Read)
10
-
ns
-
tchw
CSX “H” pulse width
0
-
ns
-
tcs
Chip Select setup time
15
-
ns
-
trcs
Chip Select setup time
(Read ID)
45
-
ns
-
trcsfm
Chip Select setup time
(Read FM)
350
-
ns
-
tcsf
Chip Select Wait time
(Write/Read)
10
-
ns
-
tcsh
Chip Select Hold time
10
-
ns
-
twc
Write cycle
100
-
ns
-
twrh
Write Control Pulse H
duration
30
-
ns
-
twrl
Write Control Pulse L
duration
30
-
ns
-
DATASHEET
Page 16 of 24
4DLCD-144
Timing Chart
SIGNAL
SYMBOL
RDX(FM)
trcfm
RDX(ID)
D[7:0]
PARAMETER
MIN
MAX
UNIT
Read cycle (FM)
450
-
ns
trdhfm
Read Control Pulse H
duration (FM)
90
-
ns
trdlfm
Read Control Pulse L
duration (FM)
355
-
ns
Read cycle (ID)
160
-
ns
trdh
Read Control Pulse H
duration
90
-
ns
trdl
Read Control Pulse L
duration
45
-
ns
tdst
Write data setup time
10
-
ns
tdht
Write data hold time
10
-
ns
trat
Read access time
-
40
ns
Tratfm
Read access time
-
340
ns
20
80
ns
trc
trod
Read output disable
time
DESCRIPTION
When read ID Data
When read from
frame memory
Note
Timing parameter (VDD=3.3V, GND=0V, Ta=25˚C)
4D Systems
DATASHEET
Page 17 of 24
4DLCD-144
Reset Timing
9.2. Reset Timing
SIGNAL
SYMBOL
PARAMETER
MIN
MAX
UNIT
RESET (RESX)
T RESW
Reset pulse
duration
10
-
us
T REST
Reset cancel
-
5
ms
-
120
ms
Note
• The reset cancel includes the time required for loading ID bytes, VCOM setting and other settings from
the EEPROM (or similar device) to register. This loading is done every time when there is HW reset cancel
time (trest) within 5 ms after a siring edge of RESX.
• Spike due to an electrostatic discharge on RESX line does not cause irregular system reset according to
the table below
4D Systems
RESX Pulse
Action
Shorter than 5us
Reset rejected
Longer than 9us
Reset
Between 5us and 9us
Reset starts
DATASHEET
Page 18 of 24
4DLCD-144
Power On Sequence
9.3. Power On Sequence
9.3.1. Case 1 - RES line is held High or Unstable by Host at Power ON
9.3.2. Case 2 - RES line is held Low by Host at Power ON
9.4. Power-off Sequence - Uncontrolled Power Off
Uncontrolled power off is a situation where power is removed unexpectedly, e.g. a battery powering
a device is disconnected without using the controlled power off sequence. There will not be any da
mage to the display module, nor will the display module cause any damage to the host. During an
uncontrolled power off event, ST7735S causes the display to blank its content and there will not be
any further abnormal visible effects on the display after 1 second of the power being removed. The
display will remain blank until the Power On Sequence occurs.
4D Systems
DATASHEET
Page 19 of 24
4DLCD-144
Reliability Test
10. Reliability Test
Reliability Test
No.
SYMBOL
TEST CONDITION
1
High Temperature Storage
80˚C±2˚C 96H
Restore 2H at 25˚C
Power off
2
Low Temperature Storage
-30˚C±2˚C 96H
Restore 2H at 25˚C
Power off
3
High Temperature Operation
70˚C±2˚C 96H
Power on
4
Low Temperature Operation
-20˚C±2˚C 96H
Power on
5
High Temperature & Humidity
Operation
60˚C±2˚C
90%RH 96H
Power on
REMARK
After test cosmetic and electrical defects
should not happen.
-20˚C25˚C70˚C
30min 5min 30min
6
Temperature Cycle
7
Vibration Test
10Hz~150Hz, 100m/s 2,
120min
8
Shock Test
Half-sinewave, 300m/s 2,
11ms
After 10 cycles, restore 2H
at 25˚C
Power off
Note
The Displays are of the highest rated ‘Grade A’, which allows for 0-4 defective pixels. A defective pixel could be
solid Black (Dead), White, Red, Green or Blue.
4D Systems
DATASHEET
Page 20 of 24
4DLCD-144
Precautions for Using LCD Modules
11. Precautions for Using LCD Modules
11.1. Handing Precautions
• The display panel is made of glass and a polarizer. The glass is fragile. It tends to be chipped
during handling, especially on the edges. Please avoid dropping or jarring. Please be careful not
subject it to a mechanical shock by dropping it on impact.
• If the display panel is damaged and the liquid crystal substance leaks out, be sure not to get any
of it in your mouth. If the substance contacts your skin or clothes, wash it off using soap and
water.
• Do not apply excessive force to the display surface or the adjoining areas since this may cause
the color tone to vary. Do not touch the display with bare hands. This will stain the display area
and degrade insulation between terminals (some cosmetics are determined by the polarizer).
• The polarizer covering the display surface of the LCD module is soft and easily scratched. Handle
this polarizer carefully. Do not touch, push or rub the exposed polarizer with anything harder
than an HB pencil lead (e.g., glass, tweezers, etc.). Do not put or attach anything to the display
area to avoid leaving marks on it. Condensation on the surface and contact with terminals due to
cold temperatures will damage, stain or contaminate the polarizer. After products are tested at
low temperatures they must be warmed up in a container before coming into contact with
room-temperature air.
• If the display surface becomes contaminated, breathe on the surface and gently wipe it with a
soft dry cloth. If it is heavily contaminated, moisten the cloth with one of the following solvents
• Isopropyl alcohol
• Ethyl alcohol Do not scrub hard as it might damage the display surface.
• Solvents other than those mentioned above may damage the polarizer. Especially the following.
• Water
• Ketone
• Aromatic solvents Wipe off saliva or water drops immediately, contact with water over a long
period may cause deformation or color fading. Avoid contact with oil and fat.
• Take necessary precautions to minimize corrosion of the electrode. Corrosion of the electrodes is
accelerated by water droplets, moisture condensation or current flow in a high-humidity
environment.
• Install the LCD Module by using the mounting holes. When mounting the LCD module, make
sure it is free of twisting, warping and distortion. In particular, do not forcibly pull or bend the I/O
cable or the backlight cable.
• Do not attempt to disassemble or process the LCD module.
• NC terminal should be open. Do not connect anything to it.
• If the logic circuit power is off, do not apply input signals.
4D Systems
DATASHEET
Page 21 of 24
4DLCD-144
Handing Precautions
• Control Electro-Static Discharge. Since this module uses a CMOS LSI, the same careful attention
should be paid to electrostatic discharge as for an ordinary CMOS IC. To prevent the destruction
of the elements by static electricity, ensure that an optimum work environment is maintained.
• Before removing the LCM from its packing case or incorporating it into a set, be sure that the
module and your body have the same electric potential. Be sure to ground your body when
handling the LCD modules.
• To reduce the amount of static electricity generated, do not conduct assembly and other
work under dry conditions. To reduce the generation of static electricity, please ensure that
the air in the work environment is not too dry. Relative humidity of 50%-60% is
recommended. As much as possible, make the electric potential of your work clothes and
that of the workbench the ground potential.
• The LCD module is coated with a film to protect the display surface. Be careful when peeling
off this protective film since static electricity may be generated.
• Since the LCM has been assembled and adjusted with a high degree of precision, avoid applying
excessive shocks to the module or making any alterations or modifications to it.
• Do not alter, modify or change the shape of the tab on the metal frame.
• Do not make extra holes on the printed circuit board, modify its shape or change the
positions of the components to be attached.
• Do not damage or modify the pattern writing on the printed circuit board.
• Do not modify the zebra rubber strip (conductive rubber) or heat seal connector.
• Do not drop, bend or twist the LCM.
4D Systems
DATASHEET
Page 22 of 24
4DLCD-144
Storage Precautions
11.2. Storage Precautions
When storing the LCD modules, the following precautions are necessary.
• Store them in a sealed polyethylene bag. If properly sealed, there is no need for the desiccant.
• Store them in a dark place. Do not expose to sunlight or fluorescent light, keep the temperature
between 0℃ and 35℃, and keep the relative humidity between 40%RH and 60%RH.
• The polarizer surface should not come in contact with any other objects. (We advise you to store
them in an anti-static electricity container in which they were shipped. Some Liquid crystals
solidify under low temperatures (below the storage temperature range) leading to defective
orientation or the generation of air bubbles (black or white). Air bubbles may also be generated if
the module is subjected to low temperatures.
• If the LCD modules have been operating for a long time showing the same display patterns, the
display patterns may remain on the screen as ghost images and a slight contrast irregularity may
also appear. A normal operating status can be regained by suspending use for some time. It
should be noted that this phenomenon does not adversely affect performance reliability.
• To minimize the performance degradation of the LCD modules resulting from the destruction
caused by static electricity etc., please avoid holding the following sections when handling the
modules’
• The exposed area of the printed circuit board
• Terminal electrode sections
4D Systems
DATASHEET
Page 23 of 24
4DLCD-144
Revision History
12. Revision History
Document Revision
4D Systems
REVISION
DATE
COMMENT
1.0
29/01/2010
Initial Version
1.1
20/05/2012
Driver IC Change
1.2
14/01/2021
Facelift of Datasheet, updated information
1.3
20/01/2023
Modified datasheet for web-based documentation
DATASHEET
Page 24 of 24
