MODEL NO
:
LMT121ENLFWA
MODEL VERSION:
00
SPEC VERSION :
V2.0
ISSUED DATE:
2021-03-23
□ Preliminary Specification
■ Final Product Specification
Topway Confirmed :
Prepared by
Checked by
Approved by
wangxikuan
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Document Name: LMT121ENLFWA-Manual-Rev2.0(w_dwg)
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TOPWAY
LCD Module User Manual
LMT121ENLFWA
Table of Contents
Table of Contents ............................................................................................................................ 2
Record of Revision .......................................................................................................................... 3
1
General Specifications.............................................................................................................. 4
2
Input/Output Terminals ............................................................................................................. 5
3
Absolute Maximum Ratings ...................................................................................................... 6
4
Electrical Characteristics .......................................................................................................... 7
5
Timing Chart ........................................................................................................................... 13
6
Optical Characteristics ........................................................................................................... 16
7
Environmental / Reliability Test ............................................................................................... 20
8
Mechanical Drawing ............................................................................................................... 21
9
Precautions For Use of LCD Modules ................................................................................... 22
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LCD Module User Manual
LMT121ENLFWA
Record of Revision
Rev Issued Date
Description
Editor
1.0
2019-01-25 Preliminary Specification Released.
wangxikaun
1.1
2019-10-23 Update more details.
wangxikaun
1.2
2020-03-10
Update mechanical drawing(modify screw hole of
wangxikaun
short side) on page18.
1.3
2020-04-01
Modify display direction on page5.
Update timing on page10.
wangxikaun
1.4
2020-08-06 Update vibration test condition on page17
wangxikaun
2.0
2021-03-23 Final Version Released.
wangxikaun
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LCD Module User Manual
LMT121ENLFWA
1 General Specifications
Feature
Spec
Size
12.1 inch
Resolution
1280(RGB) x 800
Technology Type
SFT
Pixel Configuration
R.G.B. Vertical Stripe
Display Spec.
Pixel Pitch (mm)
0.204x0.204
Display Mode
Transmissive, Normally Black
Surface Treatment(Up Polarizer)
AG
Viewing Direction
All direction
LCM (W x H x D) (mm)
278.0x184.0x9.9
Active Area(mm)
261.1x163.2
Mechanical
With /Without TSP
Without Touch Screen
Characteristics
Matching Connection Type
JAE:FI-X30CL
Weight (g)
445
Electrical
Interface
1port LVDS, 6/8bit selectable
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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LCD Module User Manual
LMT121ENLFWA
2 Input/Output Terminals
2.1 TFT LCD Panel
Connector type: MSAKT2407P30HB(STM)
Matching Connector: JAE FI-X30CL or compatible
No
Symbol
I/O
Description
Comment
1
VLED
P Backlight power supply +12V
2
VLED
P Backlight power supply +12V
3
VLED
P Backlight power supply +12V
4
VLED
P Backlight power supply +12V
5
VLED_EN
I
Backlight on/off control (1: ON, 0:OFF)
6
VLED_PWM
I
Backlight dimming control
7
GND
P Power ground
8
GND
P Power ground
9
VDD
P
Power Supply +3.3V
10
VDD
P
Power Supply +3.3V
11
GND
P Power ground
12
GND
P Power ground
13
Rxin0-
I
-LVDS differential data input(R0~R5,G0)
14
Rxin0+
I
+LVDS differential data input(R0~R5,G0)
15
GND
P Power ground
16
Rxin1-
I
-LVDS differential data input(G1~G5,B0~B1)
17
Rxin1+
I
+LVDS differential data input(G1~G5,B0~B1)
18
GND
P Power ground
19
Rxin2-
I
-LVDS differential data input(B2~B5,HS,VS,DE)
20
Rxin2+
I
+LVDS differential data input(B2~B5,HS,VS,DE)
21
GND
P Power ground
22
RxCLK-
I
-LVDS differential data input
23
RxCLK+
I
+LVDS differential data input
24
GND
P Power ground
25
Rxin3-
I
-LVDS differential data input(R6~R7,G6~G7,B6~B7)
26
Rxin3+
I
+LVDS differential data input(R6~R7,G6~G7,B6~B7)
27
GND
P Power ground
28
SEL6/8
I
Low-->6 bit input mode
High or NC-->8 bit input mode
29
GND
P Power ground
30
GND
P Power ground
Note1: I/O definition: I-----Input
P----Power/Ground
Note2: Display direction (PCB at down side)
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LMT121ENLFWA
3 Absolute Maximum Ratings
3.1 Driving TFT LCD Panel
GND=0V
Item
Symbol
MIN
MAX
Unit
Remark
Voltage Input
VDD
-0.50
4.00
V
Stress Rating.
LED power
VLED
-0.50
33V
V
LED control
VLED_EN 、
-0.50
5.5V
V
VLED_PWM
Operating Temperature
T op
-20.0
70.0
℃
Storage Temperature
T st
-30.0
80.0
℃
--
≤ 95
%
Ta ≤ 40 ℃
--
≤ 85
%
40 ℃＜ Ta ≤ 50 ℃
Relative Humidity
(Note1)
RH
--
≤ 55
%
50 ℃＜ Ta ≤ 60 ℃
--
≤ 36
%
60 ℃＜ Ta ≤ 70 ℃
--
≤ 24
%
70 ℃＜ Ta ≤ 80 ℃
Absolute Humidity
AH
--
≤ 70
g/m ³
Ta ＞ 70 ℃
Table 3.1 absolute maximum rating
Note1: Ta means the ambient temperature.
It is necessary to limit the relative humidity to the specified temperature range.
Condensation on the module is not allowed.
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LCD Module User Manual
LMT121ENLFWA
4 Electrical Characteristics
4.1 Driving TFT LCD Panel
VCC=3.3V,GND=0V, Ta=25 ℃
Item
Symbol
MIN
TYP
MAX
Unit
Remark
Power supply Voltage
VDD
3.00
3.30
3.60
V
Include ripple
Power supply ripple
Vp-p
-
-
100
mV
Power supply current
IDD
-
200
-
mA
Power consumption
P
-
660
-
mW
Note1
Differential input voltage
|Vid|
200
-
600
mV
Differential input common
voltage
V CM
1
1.2
1.4
V
Differential
Low level
VTL
-100
-
-
mV
input threshold
voltage
High level
VTH
-
-
100
mV
Inrush current
Irush
-
-
1.5
A
Note2
Table 4.1 LCD module electrical characteristics
Note1: To test the current dissipation, using the “ white pattern ” shown .
Note2: Inrush current definition.
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LCD Module User Manual
LMT121ENLFWA
4.2
LVDS DC electrical characteristics
Figure 4.2.1 LVDS DC characteristics
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LMT121ENLFWA
Figure 4.2.2 LVDS signal characteristics
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LCD Module User Manual
LMT121ENLFWA
4.3
LVDS AC electrical characteristics
Figure 4.3 LVDS AC electrical characteristics
Note: The min value of clock frequency(30MHZ) is based on IC SPEC, user should set on
suggested value(refer to page13).
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LMT121ENLFWA
4.4 Driving Backlight
Ta=25 ℃
Item
Symbol Min
Typ
Max
Unit
Remark
Backlight power supply voltage
VLED
11
12
13
V
Backlight power supply current
I_LED
-
787
-
mA
Backlight power consumption
P_LED
-
9444
-
mW
Input voltage for
High level
-
1.2
-
5.0
V
VLED_PWM
signal
Low level
-
0
-
0.35
V
Input voltage for
High level
-
1.5
-
5.0
V
VLED_EN
Low level
-
0
-
0.8
V
VLED_PWM frequency
Fpwm
200
-
10K
HZ
VLED_PWM duty
D
3
-
100
%
Note1
Operating Life Time
--
50000
-
--
hrs
Note2
Inrush current
I R
-
-
1.5
A
Rising time:470us
Table 4.4 Backlight driving condition
Note 1: According to LED driver IC characteristics, the minimum value of VELD_PWM duty may
vary with VLED_PWM frequency, higher the frequency, bigger the duty.
Note 2: Optical performance should be evaluated at Ta=25 ℃ only.
Note 3: If LED is driven by high current, high ambient temperature & humidity condition. The life
time of LED will be reduced.
Note 4: Operating life means brightness goes down to 50% of initial brightness. Typical operating
life time is estimated data.
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LMT121ENLFWA
4.5 Block Diagram
Host
LCD module Product)
GOA
Rxin 0+
Rxin0 -
LCD panel
Rxin 1+
Rxin1-
H: 1280 × 3 (R, G, B)
1-
V: 800
Rxin2+
Rxin2-
D2-
Rxin3+
Rxin3-
D3-
RxCLK +
RxCLK-
SEL6/8
800 lines
Power supply
for gradation
GOA
GND
Note1
Note2
DC/DC
VDD
converter
Fuse
VLED
VLED_PWM
LED driver
VLED_EN
LED Backlight
GND
LCD panel signal processing board
FG
Note1: Relations between GND (Signal ground and LED driver ground) and FG (Frame ground) in
the LCD module are as follows:
GND - FG
Connected
Note2: GND and FG must be connected to customer equipment’s ground, and it is recommended
that these grounds be connected together in customer equipment.
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LMT121ENLFWA
5 Timing Chart
5.1 LVDS signal timing characteristics
VCC=3.3V, GND=0V, Ta=25 ℃
Parameter
Symbol
Value
min
typ
max
Unit
Note
CLK frequency
t clk
68
73
78
Mhz
Horizontal blanking time
t HBT
102
162
222
t clk
t HBP + t HFP
+ t HPW
Horizontal back porch
t HBP
88
t clk
Horizontal display area
t HD
1280
t clk
Horizontal front porch
t HFP
-
72
-
t clk
Horizontal period
t H
1382
1442
-
t clk
Horizontal pulse width
t HPW
-
2
-
t clk
Vertical blanking time
t VBT
26
40
74
t H
t VBP + t VFP
+ t VPW
Vertical back porch
t VBP
23
t H
Vertical display area
t VD
800
t H
Vertical front porch
t VFP
-
15
-
t H
Vertical period
t V
826
840
874
t H
Vertical pulse width
t VPW
2
t H
Table 5.1 timing parameter
Note: Blanking setting must be even numbers.
5.2 Input Clock and Data timing Diagram:
Figure 5.2 Input signal data timing
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5.3 LVDS data input format
Figure 5.3 LVDS data input format (VESA standard)
Note: This LCD module supports HV mode only, so HSYNC&VSYNC signal is necessary.
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LMT121ENLFWA
5.4 Power On/Off Sequence
Item
Symbol
Min
Typ
Max
Unit
Remark
VDD on to VDD stable
Tp1
0.5
-
-
ms
VDD stable to signal on
Tp2
50
-
-
ms
Signal on to VLED_EN on
Tp3
200
-
-
ms
PWM on to VLED_EN on
Tp4
0
-
-
ms
VLED to PWM on
Tp5
10
-
-
ms
VLED on to VELD stable
Tp6
0.5
-
10
ms
VDD off time
Tp7
-
-
10
ms
VDD off to next VDD on
Tp8
500
-
-
ms
Signal off before VDD off
Tp9
0
-
50
ms
VLED_EN off before signal off
Tp10
200
-
-
ms
VLED_EN off before PWM off
Tp11
0
-
-
ms
PWM off before VLED off
Tp12
10
-
-
ms
Table 5.4 Power on/off sequence
Figure 5.4 Interface power on/off sequence
Note: It is advised that backlight turned on later than display stabled.
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LMT121ENLFWA
6 Optical Characteristics
Ta=25 ℃
Item
Symbol
Condition
Min
Typ
Max
Unit
Remark
θ T
75
85
-
θ B
75
85
-
View Angles
CR ≧ 10
Degree Note 2
θL
75
85
-
θR
75
85
-
Note1
Contrast Ratio
CR
θ=0 °
800
1000
-
-
Note3
Note1
Response Time
T ON+ T OFF
25 ℃
-
25
40
ms
Note4
x
0.250
0.30
0.350
White
y
0.270
0.320
0.370
x
0.593
0.643
0.693
Red
y
0.286
0.336
0.386
Note5
Chromaticity
Backlight is
-
x
on
0.253
0.303
0.353
Note1
Green
y
0.571
0.621
0.671
x
0.096
0.146
0.196
Blue
y
0.032
0.082
0.132
Note1
Uniformity
U
-
70
75
-
%
Note6
NTSC
-
-
67
72
-
%
Note 5
2
Note1
Luminance
L
-
360
450
-
cd/m
Note7
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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LMT121ENLFWA
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
500mm
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 shou ld 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 bet ween 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
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
Ta=+70 ℃ , 240hrs
(Note1)
Operation
IEC60068-2-1:2007,GB2423.2-2008
2
Low Temperature
Ta=-20 ℃ , 240hrs
IEC60068-2-1:2007
Operation
GB2423.1-2008
High Temperature
Ta=+80 ℃ , 240hrs
IEC60068-2-1:2007
3 Storage
GB2423.2-2008
(non-operation)
Low Temperature
Ta=-30 ℃ , 240hrs
IEC60068-2-1:2007
4 Storage
GB2423.1-2008
(non-operation)
High Temperature & Ta = +60 ℃ , 90% RH max,240 (Note2)
5 High Humidity
hours
IEC60068-2-78 :2001
Operation
GB/T2423.3 — 2006
-30 ℃ 30 min~+80 ℃ 30 min, Start with cold temperature,
6
Thermal Shock
(non-operation)
Change time:5min,100cycles End with high temperature,
IEC60068-2-14:1984,GB2423.22-2002
Electro Static
C=150pF,R=330Ω ;
IEC61000-4-2:2001
7 Discharge
Contact:±4Kv, 5times;
GB/T17626.2-2006
(operation)
Air: ± 8KV,5times;
Vibration
5~100HZ , 19.60m/s2,1min/cycle (Note2)
8
(non-operation)
120times Per X\Y\Z
IEC60068-2-6:1982
GB/T2423.10 — 1995
60G 6ms, ±X,±Y,±Z 3 times (Note2)
9
Shock
(non-operation)
for each direction
IEC60068-2-27:1987
GB/T2423.5 — 1995
10 Package Drop Test
Height:80 cm,1 corner, 3
GB/T4857.5 — 1992
edges, 6 surfaces
Frequency ： 5-20-200HZ ，
PSD ： 0.01-0.01-0.001
11 Package Vibration
GB/T4857.23-2012
Total ： 0.781g2/HZ,
（ x/y/z each direction 30min ）
Note1: Ta is the ambient temperature of sample.
Note2: When vibration/shock test, LCD module is laid down and fixed to the test equipment.
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8 Mechanical Drawing
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LMT121ENLFWA
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LMT121ENLFWA
9 Precautions For Use of LCD Modules
a)
Handling Precautions
i.
The display panel is made of glass. Do not subject it to a mechanical shock by dropping it
from a high place, etc.
ii.
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.
iii.
Do not apply excessive force to the display surface or the adjoining areas since this may
cause the color tone to vary.
iv.
The polarizer covering the display surface of the LCD module is soft and easily scratched.
Handle this polarizer carefully.
v.
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
vi.
Do not attempt to disassemble the LCD Module.
vii.
If the logic circuit power is off, do not apply the input signals.
viii.
To prevent destruction of the elements by static electricity, be careful to maintain an
optimum work environment.
1.
Be sure to ground the body when handling the LCD Modules.
2.
Tools required for assembly, such as soldering irons, must be properly ground.
3.
To reduce the amount of static electricity generated, do not conduct assembly and
other work under dry conditions.
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.
b)
Storage Precautions
i.
When storing the LCD modules, avoid exposure to direct sunlight or to the light of
fluorescent lamps.
ii.
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%
iii.
The LCD modules should be stored in the room without acid, alkali and harmful gas.
c)
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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