LMT024FNHFWA-NAN
LCD Module User Manual
Prepared by:
Checked by:
Approved by:
SunQi
Date: 2022-07-12
Date:
Date:
Rev. Descriptions
Release Date
0.1
Preliminary release
2022-04-07
0.2
Minor Updata
2022-06-09
0.3
Minor Updata
2022-07-05
0.4
Minor Updata
2022-07-12
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Table of Content
1. Basic Specifications ............................................................................................................................. 3
1.1 Block Diagram ................................................................................................................................................................................ 3
1.2 Terminal Functions ........................................................................................................................................................................ 4
2. Absolute Maximum Ratings ................................................................................................................ 4
3. Electrical Characteristics ..................................................................................................................... 5
3.1 DC Characteristics ......................................................................................................................................................................... 5
3.2 AC Characteristics ......................................................................................................................................................................... 5
3.3 Backlight Control Timing .............................................................................................................................................................. 6
4. Functions ................................................................................................................................................. 8
4.1 Display Commands ....................................................................................................................................................................... 8
4.2 Power off the LCD Module ......................................................................................................................................................... 12
4.3 Refreshing The LCD Module ..................................................................................................................................................... 12
5. Optical Characteristics ....................................................................................................................... 13
6. LCD Module Design and Handling Precautions .......................................................................... 15
7. Appendix A <Inspection items and criteria for appearance defect> ..................................... 17
8. Outline Drawing ................................................................................................................................... 18
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1. Basic Specifications
Screen Size(Diagonal) :
2.4”
Color Depth:
262K color
Number of dots :
320 x 240(RGB)
Active Area :
48.96 x 36.72 mm
Dot Pitch :
0.153 x 0.153 mm
Display Technology :
a-Si TFT active matrix
Display Mode :
Transmissive With Normally White
Interface:
CPU 8bits/ SPI
Pixel Configuration :
RGB Vertical Stripe
Viewing Direction :
All viewing angle
Backlight Type:
LEDs
Outline Dimension :
71.5 x 49.1 x 7.70MAX mm
Operating Temperature :
-20 ~ +70°C (No Condensation)
Storage Temperature :
-30 ~ +80°C (No Condensation)
Note:
1. For saturated color display content (eg. pure-red, pure-green, pure-blue or pure-colors-combinations).
2. For “color scales” display content.
3. Color tone may slightly change by temperature and driving condition.
1.1 Block Diagram
BLEN
Backlight Circuit
320x 240 （ RGB) pixels
TFT Panel
FMARK ， /RD ， /WR ， D/C ， /CS ， /RES
SI,SCL
IM0~IM3
TFT Driver
ST7789VI or equivalent
D0~D7
VDD,VSS
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1.2 Terminal Functions
Pin No.
PIN Name
I/O
Descriptions
1(K1)
VSS
Power
Negative power supply ,0V
2(K1)
VSS
Power
3(K1)
BLEN
Input
Backlight control.Program dimming levels by driving pin with digital
pulses.
4(K1)
VDD
Power
Positive power supply
5(K1)
VDD
Power
6(K1)
/RD
Input
Read enable input, active LOW
7(K1)
/WR
Input
Write enable input, active LOW
Register Select Signal:
8(K1)
D/C
Input
D/C = H, Transferring the Display Data
D/C = L, Transferring the Control Data
Chip Select Signal:
9(K1)
/CS
Input
/CS=L, enable access to the LCD module
/CS=H, disable access to the LCD module
10(K1)
D0
I/O
:
:
I/O
Data Bus
17(K1)
D7
I/O
Reset Signal:
18(K1)
/RES
Input
/RES = L, Initialization is executed
/RES = H, Normal running
19(K1)
FMARK
Output
Displaying timing frame signal
20(K1)
NC
-
NC
21((K1))
VSS
Power
Negative power supply ,0V
22((K1))
VDD
Power
Positive power supply
23((K1))
SI
Input
Serial in signal.
24((K1))
SCL
Input
Serial Clock
Register Select Signal:
25((K1))
D/C
Input
D/C = H, Transferring the Display Data
D/C = L, Transferring the Control Data
26((K1))
Reset Signal:
/RES
Input
/RES = L, Initialization is executed
/RES = H, Normal running
27((K1))
Chip Select Signal:
/CS
Input
/CS=L, enable access to the LCD module
/CS=H, disable access to the LCD module
28((K1))
BLEN
Input
Backlight control.Program dimming levels by driving pin with digital
pulses.
Note: SPI and parallel port configuration method
Mode
Install
No install
RP3
CPU 8bit
RP1,RP2(100 Ω , 0603*4)
R2,R4,R6,R8
(default)
R1,R3,R5,R7,R12 (0 Ω ,0603)
C9,C10,C12,C13,C14
C15,C18,C20,C21
RP3(100 Ω , 0603*4)
R1,R4,R6,R8(0 Ω ,0603)
SPI
RP1,RP2
C9,C10,C12,C13,C14(0 Ω ,0603)
R2,R3,R5,R7,R12
C15,C18,C20,C21(0 Ω ,0603)
2. Absolute Maximum Ratings
Items
Symbol
Min.
Max.
Unit
Condition
Supply Voltage
VDD
-0.3
+5.3
V
VSS = 0V
Input Voltage
/RES, /WR,/RD
D0~D7,D/C,/CS
-0.3
3.4
V
VSS = 0V
Operating Temperature
T OP
-20
+70
C
-
Storage Temperature
T ST
-30
+80
C
-
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Cautions:
Any Stresses exceeding the Absolute Maximum Ratings may cause substantial damage to the device. Functional
operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure
to extreme conditions may affect device reliability.
3. Electrical Characteristics
3.1 DC Characteristics
VDD=5.0V ,VSS=0V, T OP =25 C
Items
Symbol
MIN.
TYP.
MAX.
Unit Application Pin
Supply Voltage
VDD
4.7
5.0
5.3
V
VDD
Input High Voltage
V IH
2..4
-
3.4
V
/RES, /CS, D/C,
Input Low Voltage
V IL
-
-
1.0
V
D0~D7,/WR,/RD
Output High Voltage
V OH
2.7
-
-
V
Output Low Voltage
V OL
-
-
0.7
V
D0~D7,FMARK
IDD
-
86.4
90
mA
Backlight are
Operating Current
ON
IDD
-
6.36
6.5
mA
Backlight are
OFF
3.2 AC Characteristics
3.2.1 8080 Mode System Bus Timing
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3.2.2 Reset Timing
VDD=3.3V,VSS=0V, T OP =25 C
Item
Symbol
MIN.
TYP.
MAX.
Unit
Reset LOW pulse width
T RW
10
-
-
us
Reset time
T RT
-
-
120
ms
3.3 Backlight Control Timing
VDD=3.3V,VSS=0V, T OP =25 C
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Signal Symbol
Parameter
Spec.
Description
Min TYP. MAX.
Unit
T HI
Time Delay between Steps
0.5
-
-
us
BLEN
T LO
CTRL LOW Time for Diming
0.5
-
500
us
H:1.2V
L:0.5V
T SD
CTRL LOW ,shutdown Pulse
-
ms
Width
-
1.6
Note:for basic ON/OFF function,please beware of minimum pulse width.
Register BLEN timing
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4. Functions
4.1 Display Commands
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Note: Please refer to Sitronix ST7789VI data sheet for more details.
4.2 Power off the LCD Module
It recommends that enter Sleep Mode before power off the LCD module.
4.3 Refreshing The LCD Module
It recommends that the operating modes and display contents be refreshed periodically to prevent
the effect of unexpected noise.
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5. Optical Characteristics
Item
Symbol Condition
Min
Typ
Max
Unit
Remark
θT
70
80
-
View Angles
θB
CR ≧ 10
70
80
-
Degree Note2,3
θL
70
80
-
θR
70
80
-
Contrast Ratio
CR
θ= 0°
600
800
-
Note 3
T ON
Response Time
25 ℃
-
20
30
ms
Note 4
T OFF
x
-
-
-
White
Note 1,5
y
-
-
-
x
-
-
-
Red
Note 1,5
Chromaticity
Backlight is
y
-
-
-
x
on
-
-
-
Green
Note 1,5
y
-
-
-
x
-
-
-
Blue
Note 1,5
y
-
-
-
Uniformity
U
-
80%
-
%
Note 6
NTSC
65%
70%
-
%
Note 5
Luminance
L
250
300
-
cd/ ㎡ Note 7
Test Conditions:
1.I LEDA = 80mA, and the ambient temperature is 25 ℃ .
2. The test systems refer to Note 1 and Note 2.
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Note 1: : reference Figure1
The optical characteristics should be measured in dark
room. After 5 Minutes operation, the optical properties are
measured at the center point of the LCD screen. All input
terminals LCD panel must be ground when measuring the
center area of the panel.
Measuring condition:
- Measuring surroundings: Dark room
- Measuring temperature: Ta=25 ℃ .
- Adjust operating voltage to get optimum
Figure 1
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: reference Figure2
The luminance uniformity is calculated by using following
formula.
△ Bp = Bp (Min.) / Bp (Max.)×100 (%)
Bp (Max.) = Maximum brightness in 9 measured spots
Bp (Min.) = Minimum brightness in 9 measured spots.
Note 3: reference Figure3
The definition of contrast ratio:
Figure 2
Luminance When LCD is at
“White” state
ContrastRatio(CR)= Luminance When LCD is at
“Black” state
(Contrast Ratio is measured in optimum common
electrode voltage)
“ White state “ : The state is that the LCD should drive by
Vwhite. “ Black state ” : The state is that the LCD should
Figure 3
drive by Vblack.Vwhite: TBD V Vblack: TBD V.
Note 4: Definition of Response time
The response time is defined as the LCD optical switching
time interval between “ White ” state and
“ Black ” state. Rise time (TON) is the time between
photo detector output intensity changed from 90%
to 10%. And fall time (TOFF) is the time between photo
detector output intensity changed from 10% to 90%.
Note 5: Definition of color chromaticity (CIE1931)
Color coordinates measured at center point of LCD.
Note 6: Definition of Luminance Uniformity Figure4
Figure 4
Active area is divided into 9 measuring areas (Refer Fig.
2). Every measuring point is placed at the
center of each measuring area.
Luminance Uniformity (U) = Lmin/ Lmax
L-------Active area diameter,W----- Active area width
Lmax: The measured Maximum luminance of all
measurement position.
Lmin: The measured Minimum luminance of all
measurement position.
Note 7: Definition of Luminance:
Measure the luminance of white state at center point.
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6. LCD Module Design and Handling
6. 液晶显示模块设计和使用须知
Precautions
- Please ensure V0, VCOM is adjustable, to enable LCD module get the - 请注意 V0, VCOM 的设定, 以确保液晶显示模块
best contrast ratio under different temperatures, view angles and
在不同的使用温度下以及在不同的视角和位置观
positions.
察模块显示，均能达到最佳对比度，请务必将应
用电路上设置为对比度可调。
- Normally display quality should be judged under the best contrast ratio - 请注意液晶显示模块的显示品质判定是指在正常
within viewable area. Unexpected display pattern may com out under
对比度下以及视窗(V.A)范围内进行的，非正常对
abnormal contrast ratio.
比度下液晶可能会出现非预期的显示不良，应注
意区分。
- Never operate the LCD module exceed the absolute maximum ratings.
- 请勿在最大额定值以外使用液晶显示模块。
- Never apply signal to the LCD module without power supply.
- 请勿在没有接通电源的条件下，给液晶显示模块
输送信号。
- Keep signal line as short as possible to reduce external noise - 请尽可能缩短信号线的连接，以避免对液晶显示
interference.
模块的信号干扰。
- IC chip (e.g. TAB or COG) is sensitive to light. Strong light might cause - 集成电路因 IC 芯片(如 TAB 或 COG)对紫外线极为
malfunction. Light sealing structure casing is recommended.
敏感，强光环境下可能会引起液晶显示模块功能
失效，故应采用不透光的外壳。
- Make sure there is enough space (with cushion) between case and LCD - 请在液晶显示模块与外壳之间保留足够的空间(可
panel, to prevent external force passed on to the panel; otherwise that
使用衬垫)，以缓冲外力对液晶显示模块的损坏或
may cause damage to the LCD and degrade its display result.
因受力不均而产生的显示不匀等异常现象。
- Avoid showing a display pattern on screen for a long time (continuous - 避免液晶显示屏在某一画面下长时间点亮，否则
ON segment).
有出现残影的风险；请通过软件每隔一段时间改
变一次画面。
- LCD module reliability may be reduced by temperature shock.
- 液晶显示模块的可靠性可能因温度冲击而降低。
- When storing and operating LCD module, avoids exposure to direct - 请勿在阳光直射、高湿、高温或低温下储存和使
sunlight, high humidity, high or low temperature. They may damage or
用液晶显示模块，这将造成液晶显示模块的损坏
degrade the LCD module.
或失效。
- Never leave LCD module in extreme condition (max./min storage/operate - 请勿在极限环境(最大/最小存储/工作温度)下使
temperature) for more than 48hr.
用或放置液晶显示模块超过 48 小时以上。
- Recommend LCD module storage conditions is 0 C~40 C <80%RH.
- 液晶显示模块建议存储条件为: 0 C~40 C <80%RH 。
- LCD module should be stored in the room without acid, alkali and harmful - 请勿让液晶显示模块存储于带有 酸性, 碱性, 有
gas.
害气体环境之中。
- Avoid dropping & violent shocking during transportation, and no - 在运输过程中, 请勿让液晶显示模块跌落与猛烈
excessive pressure press, moisture and sunlight.
震动, 同时避免 异常挤压, 高湿度, 与阳光照
射.
- LCD module can be easily damaged by static electricity. Please maintain - 液晶显示模块极易受静电损坏，请务必保证液晶
an optimum anti-static working environment to protect the LCD module.
显示模块在防静电的工作环境中使用或保存。
(eg. ground the soldering irons properly)
(如: 烙铁正确接地,等)
- Be sure to ground the body when handling LCD module.
- 拿取液晶显示模块时需注意操作人员的接地情
况。
- Only hold LCD module by its sides. Never hold LCD module by applying - 请手持液晶显示模块的边沿取放模块，防止热压
force on the heat seal or TAB.
纸或 TAB 部位受力。
- When soldering, control the temperature and duration avoid damaging - 焊接液晶模块时，请注意控制烙铁的温度、焊接
the backlight guide or diffuser which might degrade the display result
时间，以免烫坏导光板或偏光片，导致显示不匀
such as uneven display.
等不良现象发生。
- Never let LCD module contact with corrosive liquids, which might cause - 请勿使用洗板水等腐蚀性液体接触液晶模块，以
damage to the backlight guide or the electric circuit of LCD module.
免腐蚀导光板或模块电路。
- Only clean LCD with a soft dry cloth, Isopropyl Alcohol or Ethyl Alcohol. - 仅可使用柔软的干布, 异丙醇或乙醇清洁液晶屏
Other solvents (e.g. water) may damage the LCD.
表面，其他任何溶剂(如:水)都有可能损坏液晶模
块。
- Never add force to components of LCD module. It may cause invisible - 请勿挤压液晶显示模块上的元器件，以避免产生
damage or degrade the module's reliability.
潜在的损坏或失效而影响产品可靠性。
- When mounting LCD module, please make sure it is free from twisting, - 装配液晶显示模块时，请务必注意避免液晶显示
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warping and bending.
模块的扭曲或变形。
- Do not add excessive force on surface of LCD, which may cause the - 请勿挤压液晶显示屏表面，这将导致显示颜色的
display color change abnormally.
异常。
- LCD panel is made with glass. Any mechanical shock (e.g. dropping from - 液晶屏由玻璃制作而成，任何机械碰撞(如从高处
high place) will damage the LCD module.
跌落)均有可能损坏液晶显示模块。
- Protective film is attached on LCD screen. Be careful when peeling off - 液晶屏表面带有保护膜, 揭除保护膜时需要注意
this protective film, since static electricity may be generated.
可能产生的静电。
- Polarizer on LCD gets scratched easily. If possible, do not remove LCD - 因液晶显示屏表面的偏光片极易划伤，安装完成
protective film until the last step of installation.
之前请尽量不要揭下保护膜。
- When peeling off protective film from LCD, static charge may cause - 请缓慢揭除保护膜，在此过程中液晶显示屏上可
abnormal display pattern. The symptom is normal, and it will turn back to
能会产生静电线，此为正常情况，可在短时间内
normal in a short while.
消失。
- LCD panel has sharp edges, please handle with care.
- 请注意避免被液晶显示屏的边缘割伤。
- Never attempt to disassemble or rework LCD module.
- 请不要试图拆卸或改造液晶显示模块。
- If display panel is damaged and liquid crystal substance leaks out, be - 当液晶显示屏出现破裂, 内部液晶液体可能流出;
sure not to get any in your mouth, if the substance comes into contact
相关液体不可吞吃, 绝对不可接触嘴巴, 如接触
with your skin or clothes promptly wash it off using soap and water.
到皮肤或衣服, 请使用肥皂与清水彻底清洗.
Warranty
This product has been manufactured to our company’s specifications as a part for use in your company’s general
electronic products. It is guaranteed to perform according to delivery specifications. For any other use apart from general
electronic equipment, we cannot take responsibility if the product is used in medical devices, nuclear power control
equipment, aerospace equipment, fire and security systems, or any other applications in which there is a direct risk to
human life and where extremely high levels of reliability are required. If the product is to be used in any of the above
applications, we will need to enter into a separate product liability agreement.
-
We cannot accept responsibility for any defect, which may arise form additional manufacturing of the product
(including disassembly and reassembly), after product delivery.
-
We cannot accept responsibility for any defect, which may arise after the application of strong external force to the
product.
-
We cannot accept responsibility for any defect, which may arise due to the application of static electricity after the
product has passed our company’s acceptance inspection procedures.
-
When the product is in CCFL models, CCFL service life and brightness will vary according to the performance of the
inverter used, leaks, etc. We cannot accept responsibility for product performance, reliability, or defect, which may
arise.
-
We cannot accept responsibility for intellectual property of a third part, which may arise through the application of our
product to our assembly with exception to those issues relating directly to the structure or method of manufacturing
of our product.
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7. Appendix A <Inspection items and criteria for appearance defect>
Items
Criteria
Open Segment or Common
Not permitted
Short
Not permitted
Wrong Viewing Angle
Not permitted
Decliners
Not permitted
Contrast Ration Uneven
According to the limit specimen
Crosstalk
According to the limit specimen
White spots
X>1 pixel
A-area
Not permitted
Max 6 spots allowed
B-area
Max. 1 allowed
1/2 pixel<X≤1 pixel
A-area
Not permitted
B-area
Max. 2 allowed
X≤1/2 pixel
A-area
Max. 1 allowed
B-area
Max. 4 allowed
Black Sport
X>1 pixel
A-area
Not permitted
B-area
Max. 2 allowed
X≤1/2 pixel
A-area
Max. 1 allowed
B-area
Max. 4 allowed
Line Defect
Apparent vertical horizontal line defects are not permitted
Note:
1. On Pixel include 3 dots (RedDot + GreenDot + BlueDot)
2. Definition of Panel “A-area” and “B-area”
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8. Outline Drawing
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Document Name: LMT024FNHFWA-NAN-Manual-Rev0.4
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