4DLCD-24QA
Datasheet
Revision 1.1
Copyright © 2023 4D Systems
Content may change at any time. Please refer to the resource centre for latest documentation.
Contents
1. Specifications
3
1.1. Mechanical Specifications
4
1.2. Pin Descriptions
5
2. Electrical Specifications
7
2.1. Absolute Maximum Ratings
7
2.2. DC Characteristics
7
2.3. LED Backlight Maximum Ratings
8
2.4. LED Backlight Optical Characteristics
8
3. Optical Characteristics
9
4. Touch Characteristics
11
5. Initialisation Codes
12
5.1. Command Definitions
12
5.2. Init Code
13
6. Quality Testing
14
6.1. Reliability Test
14
7. Precautions for Using LCD Modules
16
7.1. Handing Precautions
16
7.2. Storage Precautions
18
8. Using LCD Modules
19
8.1. Installing LCD Modules
19
8.2. Precautions for Operation
20
8.3. Safety
20
8.4. Return LCM under Warranty
21
9. Revision History
4D Systems
22
DATASHEET
Page 2 of 22
4DLCD-24QA
Specifications
1. Specifications
General Specifications
S.No.
Items
Specifications
1
Screen size (inch)
2.4" Diagonal
2
LCD Type
TFT, Positive, TRANSMISSIVE
3
Colors
65K Color
4
Display Resolution
240 x RGB x 320
5
Module Outline (mm)
42.72 x 60.26 x 3.7 (W x H x T)
6
Active Area (mm)
36.72 x 48.96 (W x H)
7
Touch Panel Dimension
42.3 x 59.03 x 1.2
8
Viewing Direction
6:00 O’ Clock
9
Pixel Arrangement
RGB Vertical Stripe
10
Interface
8080, 8/16 bit CPU Interface
11
Assembly Type
Connector type FPC
12
Driver IC
ILI9341
13
Backlight
4 x White LED
14
Pixel Arrangement
RGB Vertical Stripe
4D Systems
DATASHEET
Page 3 of 22
4DLCD-24QA
Mechanical Specifications
1.1. Mechanical Specifications
4D Systems
DATASHEET
Page 4 of 22
4DLCD-24QA
Pin Descriptions
1.2. Pin Descriptions
4D Systems
Pin
Symbol
I/O
Function
1
GND
Power
Ground
2
GND
Power
Ground
3
IMO(8/16)
Control
Interface Mode
0: for 16bit Mode
1: for 8bit Mode
4
FMARK
Control
Output a frame head pulse signal
5
Y- (YD)
INPUT
Touch Panel Y
6
X+ (XL)
INPUT
Touch Panel X
7
RESET
INPUT
A Reset Signal
8
RS
INPUT
A Register select signal
9
CS
INPUT
A Chip select signal
10
RD
INPUT
Read signal
11
WR
INPUT
Write signal
12
VCC
Power
3.3V: Analog Power Supply
13
NC
-
Not Connected
14
GND
Power
Ground
15~22
DB15~ DB08
I/O
Parallel interface data bus
23
DB7
I/O
Parallel interface data bus
24
DB6
I/O
Parallel interface data bus
25
DB0
I/O
Parallel interface data bus
26
DB1
I/O
Parallel interface data bus
27
DB2
I/O
Parallel interface data bus
28
DB3
I/O
Parallel interface data bus
29
DB4
I/O
Parallel interface data bus
30
DB5
I/O
Parallel interface data bus
31
Y+(YU)
INPUT
Touch Panel Y
32
X- (XR)
INPUT
Touch Panel X :
33
LEDA
LED Anode
34
LEDK1
LED cathode
DATASHEET
Page 5 of 22
4DLCD-24QA
4D Systems
Pin Descriptions
Pin
Symbol
I/O
Function
35
LEDK2
LED cathode
36
LEDK3
LED cathode
37
LEDK4
LED cathode
38
NC
-
Not Connected
39
NC
-
Not Connected
40
GND
Power Ground
DATASHEET
Page 6 of 22
4DLCD-24QA
Electrical Specifications
2. Electrical Specifications
2.1. Absolute Maximum Ratings
Absolute Maximum Ratings
Items
Symbol
Condition
Min.
Max.
Unit
Power supply
Voltage
V CI
Ta = +25°C
-0.3
+4.6
V
V GH – V SS
-0.3
+18.5
V
V SS – V GL
-0.3
+18.5
V
Input Voltage
Vin
-0.3
V CI + 0.3
V
Operating
Temperature
T OP
-
-20
+70
°C
Storage Temperature
T ST
-
-30
+80
°C
Storage Humidity
HD
-
20
90
%RH
Caution
Any stresses exceeding the absolute Maximum Ratings may cause substantial damage to the device.
2.2. DC Characteristics
DC Characteristics
Items
Symbol
Conditions
Min.
Typ.
Max.
Unit
Power supply
voltage
V CI
Ta = +25°C
2.6
2.8
3.3
V
Input High
Voltage
V IH
0.8V CI
-
V CI
V
Input Low
Voltage
V IL
-0.3
-
0.2V CI
V
Output High
Voltage
V OH
0.8V CI
-
-
V
Output Low
Voltage
V OL
-
-
0.2V CI
V
4D Systems
DATASHEET
Page 7 of 22
4DLCD-24QA
LED Backlight Maximum Ratings
2.3. LED Backlight Maximum Ratings
LED Backlight Maximum Ratings
Items
Symbol
Conditions
Min.
Typ.
Max.
Unit
Forward
Current
IF
Ta = +25°C
-
-
60
mA
Forward
Voltage
VF
-
-
3.5
V
Power
Dissipation
PD
-
-
210
mW
2.4. LED Backlight Optical Characteristics
LED Backlight Optical Characteristics
Items
Symbol
Conditions
Min.
Typ.
Max.
Unit
Forward Voltage
VF
IF = 60mA
2.8
3.2
3.5
V
Average Brightness
(without LCD)
IV
VF =3.2V
3500
-
-
cd/m2
Chromaticity
Coordinates
X
4 x White
LEDs
0.26
-
0.31
Y
Ta = +25°C
0.26
-
0.31
Color
4D Systems
White
DATASHEET
Page 8 of 22
4DLCD-24QA
Optical Characteristics
3. Optical Characteristics
Optical characteristics are determined after the unit has been 'ON' and stable for approximately
30min in a dark environment at 25°C.
Optical Characteristic Measurement and Method
The values specified are at an approximate distance of 50cm from the TFT-LCD surface at a viewing
angle of θ = Φ = 0°. VCC = 2.8V
Optical Characteristics
Item
Symbol
Contrast ratio
Cr
Response time
Tr+Tf
Color Filter
chromaticity
Red x
Condition
Min
Typ
Max
Unit
Remark
-
250
-
-
Note 3
Ta = +25°C
θx = θy = 0°
-
30
-
ms
Note 2
Ta = +25°C
θx = θy = 0°
0.606
0.626
0.646
-
Note 1
Red y
0.314
0.334
0.354
-
Green x
0.257
0.277
0.297
-
Green y
0.529
0.549
0.569
-
Blue x
0.122
0.142
0.162
-
Blue y
0.102
0.122
0.142
-
White x
0.283
0.303
0.323
-
White y
0.305
0.325
0.345
-
Average Brightness
Pattern = white
display (main)
Iv
IF = 60mA
-
150
-
cd/m2
Uniformity
∆B
IF = 60mA
80
-
-
%
4D Systems
DATASHEET
Note 1
Page 9 of 22
4DLCD-24QA
Optical Characteristics
Note
1. ∆B = B(min) / B(max) ×100%
2. Measurement Condition for Optical Characteristics:
a. Environment: 25°C±5°C / 60±20%R.H no wind, dark room below 10 Lux with a typical lamp.
b. Current and typical operating frequency.
c. Measurement Distance: 500 ± 50mm, (θ = 0°).
d. Equipment: TOPCON BM-7 fast, (field 1°), after 10 minutes of operation.
e. The uncertainty of the C.I.E coordinate measurement ±0.01, Average Brightness ± 4%
Response Time
The output signals of the photodetector 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 10% and 90% of Amplitudes.
Contrast Ratio
Viewing Angle
Note
The Screens used are the highest rated 'Grade A' Displays which allow for 0-4 defective pixels. A defective
pixel could be solid Black (Dead), Red, Green or Blue. 4D Systems is not liable for a return/replacement for any
Display that has 4 or fewer defective pixels.
4D Systems
DATASHEET
Page 10 of 22
4DLCD-24QA
Touch Characteristics
4. Touch Characteristics
Touch Parameters
Parameter
Conditions
Min
Typ
Max
Units
Operating Voltage
-
5
-
V
Linearity
±1.5
%
Terminal Resistance X
X film side
200
300
800
Ohm
Terminal Resistance Y
Y film side
300
600
900
Ohm
Operating Temperature
-10
-
60
°C
Storage Temperature
-20
-
70
°C
Transmittance
80
-
-
%
Life Time – Tapping
Durability
1
-
-
Million
1
-
-
Million
10
ms
Life Time – Pen
Durability
Stylus Pen or Finger
Press
Response Time
• ITO Film: Single Layer/Clear Hard Coating
• Tail Type: FPC by Golden Plated
• Connection: FPC Connector
• RoHS Compliant
4D Systems
DATASHEET
Page 11 of 22
4DLCD-24QA
Initialisation Codes
5. Initialisation Codes
5.1. Command Definitions
Command Definitions
READ_DISPLAY_PIXEL_FORMAT
0x0C
SLEEP_OUT
0x11
GAMMA_SET
0x26
DISPLAY_OFF
0x28
DISPLAY_ON
0x29
SET_COLUMN_ADDRESS
0x2A
SET_PAGE_ADDRESS
0x2B
WRITE_MEMORY
0x2C
READ_MEMORY
0x2E
MEMORY_ACCESS_CONTROL
0x36
WRITE_MEMORY_CONTINUE
0x3C
READ_MEMORY_CONTINUE
0x3E
PIXEL_FORMAT_SET
0x3A
FRAME_RATE_CONTROL
0xB1
DISPLAY_FUNCTION_CONTROL
0xB6
POWER_CONTROL_1
0xC0
POWER_CONTROL_2
0xC1
VCOM_CONTROL_1
0xC5
VCOM_CONTROL_2
0xC7
POWER_CONTROL_A
0xCB
POWER_CONTROL_B
0xCF
POSITIVE_GAMMA_CORRECTION
0xE0
NEGATIVE_GAMMA_CORRECTION
0xE1
DRIVER_TIMING_CONTROL_A
0xE8
DRIVER_TIMING_CONTROL_B
0xEA
POWER_ON_SEQUENCE_CONTROL
0xED
UNDOCUMENTED_0xEF
0xEF
ENABLE_3G
0xF2
INTERFACE_CONTROL
0xF6
PUMP_RATIO_CONTROL
0xF7
4D Systems
DATASHEET
Page 12 of 22
4DLCD-24QA
Init Code
5.2. Init Code
Format: (Command, Data1, Data2...DataN)
INTERFACE_CONTROL, 0x01, 0x01, 0x00,
POWER_CONTROL_B, 0x00, 0xC1, 0x30,
POWER_ON_SEQUENCE_CONTROL, 0x64, 0x03, 0x12, 0x81,
DRIVER_TIMING_CONTROL_A, 0x85, 0x00, 0x7A,
POWER_CONTROL_A, 0x39, 0x2C, 0x00, 0x34, 0x02,
PUMP_RATIO_CONTROL, 0x20,
DRIVER_TIMING_CONTROL_B, 0x00, 0x00,
POWER_CONTROL_1, 0x26,
POWER_CONTROL_2, 0x11,
VCOM_CONTROL_1, 0x39, 0x37,
VCOM_CONTROL_2, 0xA6,
MEMORY_ACCESS_CONTROL, 0x08,
DISPLAY_FUNCTION_CONTROL, 0x0A, 0xA2,
FRAME_RATE_CONTROL, 0x00, 0x1B,
ENABLE_3G, 0x00,
GAMMA_SET, 0x01,
PIXEL_FORMAT_SET, 0x55,
POSITIVE_GAMMA_CORRECTION, 0x0f, 0x2D, 0x0E, 0x08, 0x12, 0x0A, 0x3D, 0x95, 0x31, 0x04, 0x10,
0x09, 0x09, 0x0D, 0x00,
NEGATIVE_GAMMA_CORRECTION, 0x00, 0x12, 0x17, 0x03, 0x0d, 0x05, 0x2c, 0x44, 0x41, 0x05, 0x0F,
0x0a, 0x30, 0x32, 0x0F,
WRITE_MEMORY,
SLEEP_OUT, 0x0006,
DelayMS(120),
DISPLAY_ON
4D Systems
DATASHEET
Page 13 of 22
4DLCD-24QA
Quality Testing
6. Quality Testing
Result Evaluation Criterion:
• T = 25 + 2°C, Indoors, Not exposed to sunlight, Humidity = 60 + 5 % RH.
• Operating State: Samples subject to the test shall be in operating conditions.
6.1. Reliability Test
No.
ITEM
CONDITION
Pass/
Fail
1
High
Temperature
Storage
80°C ± 2°C, 96Hrs
Pass
2
Low
Temperature
Storage
-30°C ± 2°C, 96Hrs
Pass
3
High
Temperature
Operation
60°C, 96Hrs
Pass
4
Low
Temperature
Operation
-10°C, 96Hrs
Pass
5
High
Temperature &
Humidity
Storage
60 °C, 90%RH, 96Hrs
Pass
6
High
Temperature &
Humidity
Operation
40 °C, 90%RH, 96Hrs
Pass
7
Thermal Shock
-20°C->25°C->70°C->25°C
30min→30min→30min→30min
10 cycles
Pass
8
Vibration Test
(Packaged)
10Hz~55Hz (1min)
Amplitude: 1.5mm
Each direction (x,Y,Z) for 2hrs
Pass
9
Drop Test
(Packaged)
Packing Weight (Kg)
Drop Height
(cm)
0 ~ 45.4
122
45.4 ~ 90.8
76
90.8 ~ 454
61
Over 454
46
4D Systems
DATASHEET
REMARK
Module without
confirmation
Drop Direction 1
corner 3 edges 6
slides Each time
Page 14 of 22
4DLCD-24QA
No.
10
ITEM
Electrostatic
Test
Reliability Test
CONDITION
Pass/
Fail
Air Discharge
Apply 2KV with 5 times discharge for each
polarity +/-
Contact
Discharge
Apply 250V
with 5 times
discharge for
each polarity
+/-
REMARK
Pass
1. Temperature ambiance: 15°C ~ 35°C
2. Relative Humidity: 30% ~ 60%
3. Energy storage capacitance: CS + CD:
150pF + 10%
4. Discharge Resistance (Rd): 330Ω + 10%
5. Discharge, Mode of operation: Single
discharge (time between successive
discharges at least 1s) (Tolerance if the
output voltage indication: + 5%.)
4D Systems
DATASHEET
Page 15 of 22
4DLCD-24QA
Precautions for Using LCD Modules
7. Precautions for Using LCD Modules
7.1. 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 16 of 22
4DLCD-24QA
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 17 of 22
4DLCD-24QA
Storage Precautions
7.2. 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°C and 35°C, 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 18 of 22
4DLCD-24QA
Using LCD Modules
8. Using LCD Modules
8.1. Installing LCD Modules
The hole in the printed circuit board is used to fix LCM as shown in the picture below. Attend to the
following items when installing the LCM.
1. Cover the surface with a transparent protective plate to protect the polarizer and LC cell.
2. When assembling the LCM into other equipment, the spacer to the bit between the LCM and
the fitting plate should have enough height to avoid causing stress to the module surface, refer
to the individual specifications for measurements. The measurement tolerance should be
±0.1mm. Precaution for assembling the module with BTB connector:
Please note the position of the male and female connector position, don't assemble or assemble like
the method that the following picture shows.
4D Systems
DATASHEET
Page 19 of 22
4DLCD-24QA
Precautions for Operation
8.2. Precautions for Operation
1. The viewing angle varies with the change in liquid crystal driving voltage (VLCD). Adjust VLCD to
show the best contrast.
2. It is an indispensable condition to drive LCDs within the specified voltage limit since a higher
voltage than the limit causes a shorter LCD life. An electrochemical reaction due to direct current
causes LCD's undesirable deterioration so the use of a direct current drive should be avoided.
3. Response time will be extremely delayed at a lower temperature than the operating temperature
range and on the other hand at higher temperatures it shows dark color in them. However, those
phenomena do not mean malfunction or out-of-order with LCDs, which will come back at the
specified operating temperature.
4. If the display area is pushed hard during operation, the display will become abnormal. However,
it will return to normal if it is turned off and then back on.
5. Slight dew depositing on terminals is a cause for electrochemical reaction resulting in terminal
open circuit. Usage under the maximum operating temperature, 50%RH or less is required.
6. Input each signal after the positive/negative voltage becomes stable.
7. Please keep the temperature within the specified range for use and storage. Polarization
degradation, bubble generation or polarizer peel-off may occur with high temperature and high
humidity.
8.3. Safety
• It is recommended to crush damaged or unnecessary LCDs into pieces and wash them off with
solvents such as acetone and ethanol, which should later be burned.
• If any liquid leaks out of a damaged glass cell and comes in contact with the hands, wash off
thoroughly with soap and water. Limited Warranty.
4D Systems
DATASHEET
Page 20 of 22
4DLCD-24QA
Return LCM under Warranty
8.4. Return LCM under Warranty
No warranty can be granted if the precautions stated above have been disregarded. The typical
examples of violations are
• Broken LCD glass.
• PCB eyelet is damaged or modified.
• PCB conductors damaged.
• Circuit modified in any way, including the addition of components.
• PCB is tampered with by grinding, engraving or painting varnish.
Module repairs will be invoiced to the customer upon mutual agreement. Modules must be returned
with a sufficient description of the failures or defects. Any connectors or cables installed by the
customer must be removed completely without damaging the PCB eyelet, conductors and
terminals.
4D Systems
DATASHEET
Page 21 of 22
4DLCD-24QA
Revision History
9. Revision History
Document Revision
REVISION
1.1
4D Systems
DATE
20/01/2023
COMMENT
Modified datasheet for web-based documentation
DATASHEET
Page 22 of 22
