MODEL NO
:
LMT121EAGFWA
SPEC VERSION :
V1.2
ISSUED DATE:
2021-06-01
Preliminary Specification
Final Product Specification
Customer :
Approved by
Notes
TOPWAY Confirmed :
Prepared by
Checked by
Approved by
Dong Qiang
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LMT121EAGFWA
Table of Contents
Table of Contents............................................................................................................................ 2
Record of Revision .......................................................................................................................... 3
1
General Specifications ............................................................................................................. 4
2
Input/Output Terminals ............................................................................................................. 5
3
Absolute Maximum Ratings ...................................................................................................... 7
4
Electrical Characteristics .......................................................................................................... 8
5
Timing Chart .......................................................................................................................... 10
6
Optical Characteristics ........................................................................................................... 20
7
Environmental / Reliability Test .............................................................................................. 24
8
Mechanical Drawing ............................................................................................................... 25
9
Packing Drawing .................................................................................................................... 26
10 Precautions For Use of LCD Modules .................................................................................... 27
11 Incoming Inspection Standard ................................................................................................ 28
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Record of Revision
Rev Issued Date
Description
Editor
1.0
2021-04-12 Preliminary Specification Released.
Dong Qiang
1.1
2021-05-10
modify Selection of scan direction at page 5 & 18
Dong Qiang
1.2
2021-05-31 modify The circuit diagram of BLU at page 6
Dong Qiang
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LMT121EAGFWA
1 General Specifications
Feature
Spec
Size
12.1 inch
Resolution
1024(RGB) x 768
Technology Type
SFT
Pixel Configuration
R.G.B. Vertical Stripe
Display Spec.
Pixel Pitch (mm)
0.240 (H) 0.240 (V)
Display Mode
Transmissive, Normally Black
Surface Treatment(Up Polarizer)
HC
Viewing Direction
All direction
LCM (W x H x D) (mm)
260.5x203x9.5
Active Area(mm)
245.76*184.32
Mechanical
With /Without TSP
Without Touch Screen
Characteristics
Matching Connection Type
FI-SEB20P-HFE
Weight (g)
(550g)
Electrical
Interface
1port LVDS 8bit / 6-bit
Characteristics
Color Depth
16.7M&262K
Note 1: Viewing direction for best image quality is different from TFT definition, there is a 180
degree shift.
Note 2 : Requirements on Environmental Protection: Q/S0002
Note 3 : LCM weight tolerance : +/- 5%
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2 Input/Output Terminals
2.1 TFT LCD Panel (CN1)
Connector type: JAE FI-SEB20P-HFE
Input data signal: 8-bit
Pin No. Symbol
Signal
Input data
Remark
MAP A
MAP B
signal: 6-bit
s
A
D3+
Pixel data
R0-R1,G0-G1,B0-B
R6-R7,G6-G7,B6-B
-
1
1
7
B
GND
Ground
-
Ground
A
D3-
Pixel data
R0-R1,G0-G1,B0-B
R6-R7,G6-G7,B6-B
-
2
1
7
B
GND
Ground
-
Ground
3
DPS
Selection
High :
Normal scan
of scan direction
Low or Open :
Reverse scan
4
FRC
Selection of the
number of colors
High
Low or Open
5
GND
Ground
Ground
6
CLK+
Pixel clock
Pixel clock
7
CLK-
8
GND
Ground
Ground
9
D2+
Pixel data
B4-B7,DE
B2-B5,DE
10
D2-
11
GND
Ground
Ground
12
D1+
Pixel data
G3-G7,B2-B3
G1-G5,B0-B1
13
D1-
14
GND
Ground
Ground
15
D0+
Pixel data
R2-R7,G2
R0-R5,G0
16
D0-
17
GND
Ground
Ground
18
MSL
Selection of
LVDS input map
Low(Note1)
High or Open
Low(Note2)
19
VCC
Power supply
Power supply
20
VCC
Note1: FRC is high
Note2: FRC is low
Note3: Detail can refer to Page 13~14
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2.1 Backlight (CN2)
Connector type: SM10B-SHLS-TF(LF)
No
Symbol
I/O
Description
Remarks
1
Vi
P
Converter input voltage
2
Vi
P
Converter input voltage
3
Vi
P
Converter input voltage
4
Vi
P
Converter input voltage
5
V GND
P
Converter ground
6
V GND
P
Converter ground
7
V GND
P
Converter ground
8
V GND
P
Converter ground
9
EN
I
Enable pin
Default L(Note1)
10
PWM
I
Backlight Adjust
Default H(Note2)
I/O definition:
I----Input
O----Output
I/O----Input/Output
P----Power/Ground N — No Connect
Note1 ： The circuit diagram of PWM on LCM is as follows
Note2 ： The circuit diagram of EN on LCM is as follows
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3 Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
Remarks
LCD panel signal processing
Power supply
board
VCC
-0.5 to +5.0
voltage
V
LED driver
V i
9V to 28V
Low level
Logic Input
VIL
0 to 0.3VCC
Ta= 25 C
Voltage
V
Input voltage
High level
ViH
0.7VCC to VCC
for signals
PWM
TBD to +(5.5)
LED driver
V
EN
TBD to (12)
Inrush current
Irush
-
A
Storage temperature
Tst
-40 to +90
C
-
Front surface
TopF
-30 to +80
C
Note1
Operating temperature
Rear surface
TopR
-30 to +80
C
Note2
95
%
Ta 40 C
85
%
40 C < Ta 50 C
Relative humidity
55
%
50 C < Ta 60 C
Note4
RH
36
%
60 < Ta 70 C
24
%
70 < Ta 80 C
Absolute humidity
70
Note3
AH
Note4
g/m 3
Ta = 80 C
Note1: Measured at LCD panel surface (including self-heat)
Note2: Measured at LCD module's rear shield surface (including self-heat)
Note3: No condensation
Note4: Water amount at Ta= 80°C and RH= 24%
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4 Electrical Characteristics
4.1 Driving TFT LCD Panel
(Ta= 25 C)
Parameter
Symbol
min.
typ.
max.
Unit
Remarks
Power supply voltage
VCC
(3.2)
3.3
(3.4)
V
-
Power supply current
ICC
-
(TBD)
(TBD)
Note1
Note2
mA
at VCC= 3.3V
Permissible ripple voltage
VRPC
-
-
100
mVp-p
for VCC
High
VTH
-
-
(+100)
Differential input threshold
at VCM= 1.2 V
voltage
mV
Note3
Low
VTL
(-100)
-
-
Input voltage for
High
VFH1
(0.7VCC)
-
(VCC)
DPS,FRC and MSL signal
V
CMOS level
Low
VFL1
0
-
0.3VCC
Input current for
High
IFH1
-
-
(-300)
DPS,FRC and MSL signal
A
-
Low
IFH1
(-300)
-
-
Note1: Checkered flag pattern [by IEC 61747-6]
Note2: Pattern for maximum current
Note3: Common mode voltage for LVDS receiver
4.2 Driving Backlight
(Ta= 25 C)
Parameter
Symbol
min.
typ.
max.
Unit
Remarks
Power supply voltage
V i
(11.2)
12.0
(12.8)
V
Note1
Power supply current
192
(TBD)
Note2
Ii
-
(TBD)
Note3
mA
Note4
Permissible ripple voltage
VRPD
-
-
200
mVp-p
for VDD
High
VDFH1
(1.2)
-
(5.5)
V
Input voltage for
PWM signal
-
Low
VDFL1
0
-
(0.35)
V
High
VDFH2
TBD
(12)
TBD
V
Input voltage for
EN signal
-
Low
VDFL2
0
-
(0.8)
V
PWM frequency
f PWM
（ 200 ）
-
（ 10K ）
Hz
Note5, Note6
PWM duty ratio
DR PWM
（ 5% ）
-
（ 100 ）
%
Note7
PWM pulse width
tPWH
TBD
-
-
s
LED Life Time
LT
-
50000
-
Hrs
Note8
Note1:When designing of the power supply, take the measures for the prevention of surge
voltage.
Note2:The power supply lines (Vi and GND) may have ripple voltage during luminance control
of LED. There is the possibility that the ripple voltage produces acoustic noise and
signal wave noise in audio circuit and so on. Put a capacitor between the power supply
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lines (Vi and GND) to reduce the noise if necessary.
Note3:This value excludes peak current such as overshoot current.
Note4:At the maximum luminance control
Note5:A recommended f PWM value is as follows.
2n − 1
f PWM
=
fv
4
(n = integer, fv = frame frequency of LCD module)
Note6:Depending on the frequency used, some noise may appear on the screen, please
conduct a thorough evaluation.
Note7:The recommended PWM frequency is 200Hz to 10kHz, but the LED current cannot be
100% proportional to duty cycle, especially for high frequency and low duty ratio.
While the EN signal is high, do not set the tPWH (PWM pulse width) is less than 0.1 s.
It may cause abnormal working of the backlight. In this case, turn the backlight off and
then on again by EN signal.
Note8: Optical performance should be evaluated at Ta=25 ℃ only.
If LED is driven by high current, high ambient temperature & humidity condition.
The life time of LED will be reduced.
Operating life means brightness goes down to 50% of initial brightness.
Typical operating life time is estimated data.
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4.3 Block Diagram
Host
LCD module (Product)
D0+
D0-
H-driver
with timing controller
D1+
100
D1-
D2+
100
D2-
D3+
100
D3-
CLK+
LCD panel
100
H: 1024 × 3 (R, G, B)
CLK-
V: 768
DPS
FRC
MSL
Power
supply for
GND
Note1
Note2
Fuse
F Fus u
F us
DC/DC
VCC
se e
e
converter
Fuse
Fuse
Vi
PWM
LED Backlight
LED driver
EN
GND
FG
Note1
LCD panel signal processing board
Note2
Note1:GND (Signal ground) is connected to FG (Frame ground) in the LCD module
Note2:GND and FG must be connected to customer equipment’s ground, and it is
recommended that these grounds to be connected together in customer equipment.
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4.4
Fuse
Fuse
Parameter
Fusing
Type
Supplier
Rating
characteristics
Remarks
1.5A
VCC
(FCC16152ABT
P)
KAMAYA
250%/5s max
36V
Note1
2A
Vi
(FCC16202ABT
P)
KAMAYA.
250%/5s max
36 V
Note1:The power supply’s rated current must be more than the fusing current. If it is less than
the fusing current, the fuse may not blow in a short time, and then nasty smell, smoke
and so on may occur.
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5 Timing Chart
5.1
Timing Characteristics
Parameter
Symbol
min.
typ.
max.
Unit
Remarks
CLK
Frequency
1/tc
(50.34)
50.66
(65.34)
MHz
19.739ns (typ.)
-
21.477
-
s
Cycle
th
46.561 kHz
Horizontal
(typ.)
1084
1,088
1214
CLK
DE
Display period
thd
1024
CLK
-
Vertical
-
16.666
-
ms
Cycle
tv
60.0Hz (typ.)
(One
774
776
897
H
frame)
Display period
tvd
768
H
-
Note1: Definition of parameters is as follows.
tc= 1CLK, th= 1H
Note2: See the data sheet of LVDS transmitter.
Note3:Vertical cycle (tv) should be specified in integral multiple of Horizontal cycle (th).
5.2
Input signal timing chart
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Note1:DATA = R0-R7, G0-G7, B0-B7
5.3
LVDS data input format
Input data signal: 8-bit
VESA (MAP B)format
JEIDA (MAP A)format
Note1: LSB (Least Significant Bit) – R0, G0, B0 ； MSB (Most Significant Bit) – R7, G7,
B7
Note2: Twist pair wires with 100 (Characteristic impedance) should be used between
LCD panel signal processing board and LVDS transmitter.
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Input data signal: 6-bit
Note1: LSB (Least Significant Bit) – R0, G0, B0
MSB (Most Significant Bit) – R7, G7,
B7
Note2: Twist pair wires with 100 (Characteristic impedance) should be used between
LCD panel signal processing board and LVDS transmitter.
5.4 LVDS Rx AC SPEC
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
Clock
frequency
RXFCLK
10
-
110
MHz
1 data bit time
UI
1/7
1/RXFCLK
Position 1
Rspos1
-0.2
0
0.2
UI
Position 2
Rspos2
0.8
1
1.2
UI
Position 3
Rspos3
1.8
2
2.2
UI
Position 4
Rspos4
2.8
3
3.2
UI
Position 5
Rspos5
8
4
4.2
UI
Position 6
Rspos6
4.8
5
5.2
UI
Position 7
Rspos7
5.8
6
6.2
UI
Input data skew
|VID|=100mV
margin
TRSKM
-
-
0.2
UI
RXVCM=1.2V
RXFCLK=75MHz
Clock high time TLVCH
-
4/(7*RXFCLK)
-
ns
Clock low time
TLVCL
-
3/(7*RXFCLK)
-
ns
PLL wake-up
time
TenPLL
-
-
150
us
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Ideal TX Pulse Position
Ideal TX Pulse Position
TRSKM: Receiver strobe margin
Tsw : Strobe width ( internal data
sampling window )
VTH=Rxvcm+|VID|/2, VTL=Rxvcm-|VID|/2
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5.5 Display Colors and Input Data Signals
5.5.1 16,777,216 colors
This product can display equivalent of 16,777,216 colors with 256 gray scales (FRC:High).
Also the relation between display colors and input data signals is as follows.
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5.5.2 262,144colors
This product can display equivalent of 262,144 colors with 64 gray scales (FRC:Low).
Also the relation between display colors and input data signals is as follows.
5.6 Display Positions
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5.7 Scanning Direction
The following figures are seen from a front view.
Figure1. Normal scan (DPS: High)
Figure2. Reverse scan (DPS: Low)
5.8 POWER SUPPLY VOLTAGE SEQUENCE
5.8.1 LCD panel signal processing board
ON
OFF
ON
VCC
3.0V
Note1
0V
0.3V
TBD Tr < TBD
Toff TBDms
Display signals*
Function signals
0V
Note2
VALID period
0ms < t < TBD
0ms < t < TBD
* These signals should be measured at the terminal of 100 resistance.
Note1:If there is a voltage variation (voltage drop) at the rising edge of VCC below 3.0V,
there is a possibility that a product does not work due to a protection circuit.
Note2: Display signals (D0+/-, D1+/-, D2+/- and CLK+/-) and function signals (DPS)
must be set to Low or High-impedance, except the VALID period (See above
sequence diagram), in order to avoid the circuitry damage.
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If some of display and function signals of this product are cut while this product
is working, even if the signal input to it once again, it might not work normally. If
a customer stops the display and function signals, VCC also must be shut down.
5.8.2 LED Driver
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6 Optical Characteristics
6.1 Optical Specification
Ta=25 ℃
Item
Symbol
Condition
Min
Typ
Max
Unit
Remark
θT
70
88
-
θB
70
88
-
View Angles
CR ≧ 10
Degree Note 2
θL
70
88
-
θR
70
88
-
Note1
Contrast Ratio
CR
θ=0°
800
1000
-
-
Note3
T ON
-
25
35
Note1
Response Time
25 ℃
ms
T OFF
-
25
35
Note4
x
TBD
White
y
TBD
x
TBD
Red
y
TBD
Note5
Chromaticity
Backlight is
-
x
on
TBD
Note1
Green
y
TBD
x
TBD
Blue
y
TBD
Note1
Uniformity
U
-
75
80
-
%
Note6
NTSC
-
-
65
72
-
%
Note 5
Luminance
L
-
TBD
500
-
cd/m 2
Note1
Test Conditions:
1.
The ambient temperature is 25± 2 ℃ .humidity is 65± 7%
2.
The test systems refer to Note 1 and Note 2.
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Note 1: Definition of optical measurement system.
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.
Photo detector
Field
TFT-LCD Module
LCD Panel
The center of the screen
Note 2: Definition of viewing angle range and measurement system.
viewing angle is measured at the center point of the LCD by CONOSCOPE(ergo-80) 。
Fig. 1 Definition of viewing angle
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Note 3: Definition of contrast ratio
“White state “:The state is that the LCD should driven by Vwhite.
“Black state”: The state is that the LCD should driven by Vblack.
Vwhite: To be determined Vblack: To be determined.
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.
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Note 6: Definition of Luminance Uniformity
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 length W ----- Active area width
Fig. 2 Definition of uniformity
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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7 Environmental / Reliability Test
No
Test Item
Condition
Remark
1
High Temperature
IEC60068-2-1
Operation
Ta = +80 ℃ ,240 hours
GB2423.2
2
Low Temperature
IEC60068-2-1
Operation
Ta = -30 ℃ , 240 hours
GB2423.1
3
High Temperature
IEC60068-2-1
Storage
Ta = +90 ℃ , 240 hours
GB2423.2
4
Low Temperature
IEC60068-2-1
Storage
Ta = -40 ℃ , 240 hours
GB2423.1
High Temperature & Ta = +60 ℃ , 90% RH max,240
5 High Humidity
IEC60068-2-78
hours
Operation
GB/T2423.3
Start with cold temperature,
6
Thermal Shock
-30 ℃ 30 min~+80 ℃ 30 min,
(non-operation)
Change time:5min, 100 Cycle
End with high temperature,
IEC60068-2-14,GB2423.22
C=150pF,R=330Ω,9point/pan
el
7 ESD
Air:± 15Kv,5times;
IEC61000-4-2
Contact:± 8Kv,5times
GB/T17626.2
(Environment:15 ℃ ~35 ℃ ,
30%~60%.86Kpa~106Kpa)
5~100HZ ， 19.60m/s2
8
Vibration Test (Non
IEC60068-2-6
Op)
1min/cycle 120times Per
GB/T17626.6
X\Y\Z
539m/s2, 11ms
9
Mechanical Shock
IEC60068-2-27
(Non Op)
5times ± X 、± Y 、± Z
GB/T2423.5
Note1: Ts is the temperature of panel’s surface.
Note2: Ta is the ambient temperature of sample.
Note3: Before cosmetic and function test, the product must have enough recovery time, at least 2
hours at room temperature.
Note 4: In the standard condition, there shall be no practical problem that may affect the display
function. After the reliability test, the product only guarantees operation, but don’t guarantee all of
the cosmetic specification.
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8 Mechanical Drawing
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9 Packing Drawing
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10 Precautions for Use of LCD Modules
10.1
Handling Precautions
10.1.1 The display panel is made of glass. Do not subject it to a mechanical shock by dropping it
from a high place, etc.
10.1.2 If the display panel is damaged and the liquid crystal substance inside it leaks out, be sure
not to get any in your mouth, if the substance comes into contact with your skin or clothes,
promptly wash it off using soap and water.
10.1.3 Do not apply excessive force to the display surface or the adjoining areas since this may
cause the color tone to vary.
10.1.4 The polarizer covering the display surface of the LCD module is soft and easily scratched.
Handle this polarizer carefully.
10.1.5 If the display surface is contaminated, breathe on the surface and gently wipe it with a soft
dry cloth. If still not completely clear, moisten cloth with one of the following solvents:
— Isopropyl alcohol
— Ethyl alcohol
Solvents other than those mentioned above may damage the polarizer. Especially, do not
use the following:
— Water
— Ketone
— Aromatic solvents
10.1.6 Do not attempt to disassemble the LCD Module.
10.1.7 If the logic circuit power is off, do not apply the input signals.
10.1.8 To prevent destruction of the elements by static electricity, be careful to maintain an
optimum work environment.
10.1.8.1 Be sure to ground the body when handling the LCD Modules.
10.1.8.2 Tools required for assembly, such as soldering irons, must be properly ground.
10.1.8.3 To reduce the amount of static electricity generated, do not conduct assembly and
other work under dry conditions.
10.1.8.4 The LCD Module is coated with a film to protect the display surface. Be care when
peeling off this protective film since static electricity may be generated.
10.2
Storage Precautions
10.2.1 When storing the LCD modules, avoid exposure to direct sunlight or to the light of
fluorescent lamps.
10.2.2 The LCD modules should be stored under the storage temperature range. If the LCD
modules will be stored for a long time, the recommend condition is:
Temperature : 0 ℃ ～ 40 ℃
Relatively humidity: ≤80%
10.2.3 The LCD modules should be stored in the room without acid, alkali and harmful gas.
10.3
Transportation Precautions
The LCD modules should be no falling and violent shocking during transportation, and also
should avoid excessive press, water, damp and sunshine.
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11.DEFECT CRITERIA
11.1.1 Display specifications
(Note1)
Defect pattern
Condition
Criteria
Line defect
Display of black , white, red, green, blue
0line
Red + Green + Blue
3dots
Close defect dots
0mm < D 15mm
Same color
Note5
and different
0set
Note7
color
Bright dots
Note2, Note3
Same color
0set
2 defect
dots
Linked defect dots
D = 0mm
Different color
1set
Note6
Note7
3 defect
Same color
dots or
and different
0set
more
color
Red + Green + Blue
3dots
Close defect dots
0mm < D 15mm
Same color
Note5
and different
0set
Note7
color
Dark dots
Note2, Note4
Same color
2 defect
dots
and different
Linked defect dots
D = 0mm
color
Note6
Note7
0set
3 defect
Same color
dots or
and different
more
color
Close defect dots
0mm < D 15mm
Same color
and different
Note5
Allowed
Note7
color
Between Bright dots
2 defect
Same color
and Dark dots
dots
and different
Allowed
Linked defect dots
D = 0mm
color
Note6
Note7
3 defect
Same color
dots or
and different
0set
more
color
Total
Bright dots + Dark dots
6dots
Note1: Inspection conditions are as follows.
Temperature
25 5 C
Inspection viewing distance
20cm (The distance between the inspector's eye and
screen.)
0 R 20 , 0 L 20
Inspection direction
0 U 20
Inspection illumination
60lx (at a display surface)
Note2: See "The common inspection specifications of LCD module product
(DOD-PE-16097)" for the definitions.
Note3: Inspection display patterns for Bright dots are referred to "The common
inspection specifications of LCD module product (DOD-PE-16097)".
Note4: Inspection display patterns for Dark dots are referred to "The common
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inspection specifications of LCD module product (DOD-PE-16097)".
Note5: See "4.11.2 Close defect dots" .
Note6: See "4.10.3 Linked defect dots" .
Note7: D is the distance between defect dots.
11.1.2 Close defect dots
: Bright dot
Defect pattern
Criteria
: Dark dot
Same color and Different color
Bright dots
0mm < D 15mm
0set
Same color and Different color
Dark dots
0mm < D 15mm
Combination of bright dot
0mm < D 15mm
and dark dot
Allowed
11.1.3 Linked defect dots
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11.1.4 Appearance specifications
(Note1, Note2, Note3)
Defect pattern
Condition
Criteria
d < 0.2mm
Allowed
Dot
0.2mm d < 0.3mm
10points
shape
0.3mm d 0.5mm
3points
Impure
d > 0.5mm
0point
ingredient
W < 0.05mm
Stains
Allowed
Dust
L < 0.7mm
Line
shape
0.05mm W 0.1mm
0.7mm L 1.0mm
4points
L > 1.0mm
0point
W > 0.1mm
d 0.2mm
Allowed
Bubbles, Wrinkles, Dent
0.2mm < d 0.5mm
2points
d > 0.5mm
0point
S 0.2mm 2
Allowed
Scratch (Surface of polarizer)
S > 0.2mm 2
0point
Note1: Definition of symbols is as follows.
d: Average diameter
(This diameter is the average length of a long axis and a short axis in each
defect pattern.)
W: Width, L: Length, S: Area
Note2: Inspection conditions are as follows.
Temperature
25 5 C
Inspection viewing distance
20cm (The distance between the inspector's eye and
screen.)
0 R 45 , 0 L 45
Inspection direction
0 U 45 , 0 D 45
Inspection illumination
700lx (at an inspection desk surface)
Note3: Inspection area
C
Bezel opening
A=
A
Display
B
0.7mm
B=
0.7mm
D
Inspection
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