LMT043DFFFWD
LCD Module User Manual
Prepared by:
Checked by:
Approved by:
Li Yinyang
Date: 2016-09-20
Date:
Date:
Rev. Descriptions
Release Date
0.1
Preliminary
2016-09-20
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Document Name: LMT043DFFFWD-Manual-Rev0.1
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LCD Module User Manual
LMT043DFFFWD
Table of Content
1. General Specification ............................................................................................................ 3
2. Block Diagram ........................................................................................................................ 3
3. Terminal Functions ................................................................................................................ 4
3.1
Interface ............................................................................................................................... 4
4. Absolute Maximum Ratings .................................................................................................. 5
5. Electrical Characteristics ...................................................................................................... 5
5.1
DC Characteristics (MCU terminal)....................................................................................... 5
5.2
LED Backlight Circuit Characteristics ................................................................................... 5
5.3
AC Characteristics ................................................................................................................ 6
5.3.1
Clock and Date Input Timing Diagram ..................................................................... 6
5.3.2
SYNC Mode Timing Diagram ..................................................................................... 7
5.3.3
DE Mode Timing Diagram .......................................................................................... 7
5.3.4
Power ON Sequence ................................................................................................. 8
5.3.5
Power Off Sequence .................................................................................................. 9
6. Optical Characteristics .......................................................................................................... 9
7. Precautions of using LCD Modules .................................................................................... 11
8. Appendix A <Inspection items and criteria for appearance defect> ................................ 11
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Document Name: LMT043DFFFWD-Manual-Rev0.1
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1. General Specification
Screen Size(Diagonal) :
4.3 inch
Resolution :
480(RGB) x 272
Signal Interface :
24bit parallel interface
Color Depth :
16.7M color (24bit) *1
Dot Pitch :
0.198 x 0.198 (mm)
Pixel Configuration :
RGB Stripe
Display Mode :
Transmissive / Positive (normal white)
Surface Treatment :
Anti-Glare Treatment
Viewing Direction :
12 o’clock (Gray Scale Inversion Direction) （ *2 ）
6 o’clock （ *3 ）
Outline Dimension :
105.5 x 67.2 x 2.9 (mm)
(exclude FPC, see attached drawing for details)
Active Area :
95.04 x 53.86 (mm)
Weight :
(44.4g)
Backlight :
2x5 LEDs
Driver IC
ST7282T
Operating Temperature :
-20 ~ +70°C
Storage Temperature :
-30 ~ +80°C
Note:
*1 Color tune may slightly changed by temperature and driving voltage.
*2 For saturated color display content (eg. pure-red, pure-green, pure-blue or pure-colors-combinations).
*3 For ”color scales” display content.
2. Block Diagram
VLED-, VLED+
Backlight Circuit
480(x3) x 272 pixels
TFT Panel
R0~R7, G0~G7, B0~B7
TFT Driver
VDD, GND
ST7282T or equivalent
DCLK, HSYNC, VSYNC, DE,DISP
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3. Terminal Functions
3.1 Interface
Pin Pin
No. Name
I/O
Descriptions
1
VLED-
P
Backlight LED Cathode supply
2
VLED+
P
Backlight LED Anode supply
3
GND
P
Power Ground (0V)
4
VDD
P
Positive Power Supply
5
R0
I
Red color data input
:
:
12
R7
13
G0
I
Green color data input
:
:
20
G7
21
B0
I
Blue color data input
:
:
28
B7
29
GND
P
Power Ground (0V)
30
DCLK
I
Data clock signal input, rising edge trigger
Display on/of control (internally pull low)
31
DISP
I
DISP=0: standby mode
DISP=1: normal operation
32
HSYNC
I
Horizontal Sync signal input, active low
(If not using, pull high)
33
VSYNC
I
Vertical Sync Signal Input, active low
(If not using, pull high)
34
DE
I
Data Enable Signal Input, active high
(If not using, pull low)
35
NC
-
No connection, leave open
36
GND
P
Power Ground (0V)
37
NC
-
No connection, leave open
38
NC
39
NC
40
NC
Note:
The LMT043DFFFWD both supports DE mode and Sync mode timing.
SYNC mode, DE pull-lo, HSYNC and VSYNC for timing control
DE mode, HSYNC and VSYNC pull-hi, DE for timing control
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4. Absolute Maximum Ratings
Items
Symbol
Min.
Max.
Unit
Condition
Supply Voltage
V DD
-0.3
+4.6
V
GND = 0V
Operating Temperature
T OP
-20
+70
 C
No Condensation
Storage Temperature
T ST
-30
+80
 C
No Condensation
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.
5. Electrical Characteristics
5.1 DC Characteristics (MCU terminal)
GND=0V, V DD =3.3V, T OP =25  C
Items
Symbol
MIN.
TYP.
MAX.
Unit Applicable Pin
Operating Voltage
V DD
3.0
3.3
3.6
V
VDD
Input High Voltage
V IH
0.7VDD
-
VDD
V
Input pins
Input Low Voltage
V IL
GND
-
0.3VDD
V
Input pins
Frame Freq
F FRAME
-
60
-
Hz
Dot Data Clock
f DOTCLK
-
9.0
15
MHz
Operating Current (*1)
I DD
-
18.4
-
mA
VDD
Standby Current (*2)
I DD
-
15.2
-
uA
VDD
Note.
*1. test image is Black Mode, Frame Freq=60Hz
*2. DISP=0
5.2 LED Backlight Circuit Characteristics
If VLED+ =40mA, T OP =25  C
Items
Symbol
MIN.
TYP.
MAX.
Unit Note
Forward Voltage
Vf
-
16.0
-
V
Forward Current
If VLED+
-
40
50
mA
Life Time
-
10,000
(20,000)
-
hr
Cautions:
Exceeding the recommended driving current could cause substantial damage to the backlight and shorten its lifetime.
VLED+
VLED-
No. of LEDs = 2x5 pcs
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5.3 AC Characteristics
5.3.1 Clock and Date Input Timing Diagram
Tclk
Timing Diagram
VDDI =3.3V, VDD=3.3V, AGND=0V,T OP =25  C
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5.3.2 SYNC Mode Timing Diagram
5.3.3 DE Mode Timing Diagram
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5.3.4 Power ON Sequence
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5.3.5 Power Off Sequence
6. Optical Characteristics
Item
Symbol Condition
Min
Typ
Max
Unit
Remark
θT
70
80
-
View Angles
θB
CR ≧ 10
50
60
-
Degree Note2,3
θL
70
80
-
θR
70
80
-
Contrast Ratio
CR
θ =0 °
700
900
-
Note 3
T ON
Response Time
25 ℃
-
20
30
ms
Note 4
T OFF
x
0.255
0.305 0.355
White
Note 1,5
y
0.277
0.327
0.377
x
0.534
0.584
0.634
Red
Note 1,5
Chromaticity
Backlight is
y
0.300
0.350
0.400
x
on
0.290
0.340
0.390
Green
Note 1,5
y
0.543
0.593
0.643
x
0.102
0.152
0.202
Blue
Note 1,5
y
0.040
0.090
0.140
Uniformity
U
75
80
-
%
Note 6
NTSC
45
50
-
%
Note 5
Luminance
L
350
400
-
cd/ ㎡ Note 7
1.I F = 40 mA, and the ambient temperature is 25 ℃ .
2. The test systems refer to Note 1 and Note 2.
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Note 1:
Note 2:
The data are measured after LEDs are turned on for 5 minutes.
The definition of viewing angle:
LCM displays full white. The brightness is the average value of 9 Refer to the graph below marked by θ and Ф
measured spots. Measurement equipment SR-3A (1°)
Measuring condition:
- Measuring surroundings: Dark room
- Measuring temperature: Ta=25 ℃ .
- Adjust operating voltage to get optimum contrast at
the center of the display.
Note 3:
The definition of contrast ratio (Test LCM using SR-3A (1°)):
Note 4:
Contrast
Luminance When LCD is at “White” state
Definition of Response time. (Test LCD using BM-7A(2°)):
Ratio(CR)
=
Luminance When LCD is at “Black” state
The output signals of photo detector are measured
(Contrast Ratio is measured in optimum common electrode
when the input signals are changed from
voltage)
“black” to “white”(falling time)
and from “white” to “black”(rising time), respectively.
The response time is defined as
the time interval between the 10% and 90% of amplitudes.Refer to
figure as below.
Note 5:
Note 6:
Definition of Color of CIE1931 Coordinate and NTSC Ratio.
The luminance uniformity is calculated by using following formula.
△ Bp = Bp (Min.) / Bp (Max.)×100 (%)
Color gamut:
Bp (Max.) = Maximum brightness in 9 measured spots
Area of RGB triangle
S=
X100%
Bp (Min.) = Minimum brightness in 9 measured spots .
Area of NTSC triangle
Note 7:
Measured the luminance of white state at center point
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7. Precautions of using LCD Modules
Please refer to "LCD-Module-Design-Handling-Precaution.pdf".
8. 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
B-area
Max. 1 allowed
1/2 pixel<X≤1 pixel
A-area
Not permitted
allowed
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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