LMT070DDCFWD-3 (TOPWAY)
LCD Module User Manual

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LMT070DDCFWD-3
LCD Module User Manual
Prepared by:
Lin Li
Date: 2018-10-12
Checked by:
Date:
Approved by:
Date:
Rev. Descriptions
0.1 Preliminary release
URL: www.topwaydisplay.com
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Release Date
2018-10-12
Document Name: LMT070DDCFWD-3-Manual-Rev0.1
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LCD Module User Manual
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Table of Content
1. Applications ...........................................................................................................................3
2. General Specification ............................................................................................................ 3
3. Block Diagram........................................................................................................................ 3
4. Terminal Function.................................................................................................................. 4
4.1 K1 TFT Input Terminal ........................................................................................................................................... 4
5. Absolute Maximum Ratings .................................................................................................. 5
6. Electrical Characteristics ...................................................................................................... 5
6.1 DC Characteristics ................................................................................................................................................. 5
6.2 Current Consumption ............................................................................................................................................. 5
6.3 LED Backlight Circuit Characteristics..................................................................................................................... 5
6.4 Power Sequence.................................................................................................................................................... 6
7. AC Characteristics................................................................................................................. 7
7.1 Timing Characteristics............................................................................................................................................ 7
7.2 Input Clock and Data Timing Diagram ................................................................................................................... 7
7.3 Timing .................................................................................................................................................................... 8
7.4 Data Input Format .................................................................................................................................................. 9
7.5 Optical Characteristics ......................................................................................................................................... 10
8. Precautions of using LCD Modules .................................................................................... 11
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LCD Module User Manual

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1. Applications
LCD Module User Manual
LMT070DDCFWD-3
This Module is designed for portable DVD, GPS car TV & PMP(portable multimedia player)
application which require high quality flat panel displays. It is also a good substitute for many
outmoded CSTN module in the industrial application.
This product is composed of a TFT-LCD panel, driver ICs, FPC ,LED backlight unit .
2. General Specification
Signal Interface :
Display Technology :
Display Mode :
Screen Size(Diagonal) :
Outline Dimension :
Active Area :
Number of dots :
Pixel Pitch :
Pixel Configuration :
Backlight :
Viewing Direction :
Operating Temperature :
Storage Temperature :
Surface Treatment :
Digital 24-bits RGB
a-Si TFT active matrix
TN Type Full Color / Transmissive / Normal White
7.0”
164.9 x 100.0 x 5.7 (mm)
(see attached drawing for details)
154.08 x 85.92 (mm)
800 x 3 (RGB) x 480
0.1926 x 0.179 (mm)
RGB Stripe
LED
6 o’clock(Gray scale Inversion) (*1)
12 o’clock (*2)
-20 ~ +60°C
-30 ~ +80°C
Anti-Glare Treatment
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.
3. Block Diagram
VLED+,VLED-
Backlight Circuit
DVDD, GND, AVDD
VCOM
VGH, VGL
DCLK
DE, HS, V
S
MODE
DITHB
R0~R7, G0~G7, B0~B7
7’’ TFT Panel
Source Driver
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4. Terminal Function
4.1 K1 TFT Input Terminal
Pin No. Pin Name
I/O
Descriptions
1 VLED+
2 VLED+
3 VLED-
4 VLED-
5 GND
Power
Power
Power
Positive Backlight Power Supply
Negative Backlight Power Supply
Power GND (0V)
6 VCOM
7 DVDD
8 MODE
Input
Power
Input
Common voltage
Power for Digital Circuit
DE/SYNC mode select (*1)
9 DE
Input
Data input enable
10 VS
Input
Vertical Sync Input
11 HS
Input
Horizontal Sync Input
12 B7
::
Input
8bit Data for Blue
19 B0
20 G7
::
Input
8bit Data for Green
27 G0
28 R7
::
Input
8bit Data for Red
35 R0
36 GND
Power Power GND (0V)
37 DCLK
Input
Sample clock(*2)
38 GND
Power Power GND (0V)
39 L/R
Input
Left / right selection (*3)
40 U/D
Input
Up/down selection (*3)
41 VGH
42 VGL
43 AVDD
44 RESET
Power
Power
Power
Input
Gate ON Voltage
Gate OFF Voltage
Power for Analog Circuit
Global reset pin (*4)
45 NC
- No connection
46 VCOM
47 DITHB
Input
Input
Common Voltage
Dithering function (*5)
48 GND
Power Power GND (0V)
49 NC
50 NC
- No connection
Note:
* 1: DE/SYNC mode select. Normally pull high.
When select DE mode, MODE=”1”, VS and HS must pull high.
When select SYNC mode, MODE= “0”, DE must be grounded.
* 2: Data shall be latched at the falling edge of DCLK.
* 3: Selection of scanning mode
Setting of scan control input
U/D L/R
GND
DVDD
DVDD
GND
GND
GND
DVDD
DVDD
Scanning direction
Up to down, left to right
Down to up, right to left
Up to down, right to left
Down to up, left to right
*4: Global reset pin. Active low to enter reset state. Suggest to connect with an RC reset circuit for stability. Normally pull high.
*5: Dithering function enable control, normally pull high.
When DITHB=”1”,Disable internal dithering function.
When DITHB=”0”,Enable internal dithering function.
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5. Absolute Maximum Ratings
LMT070DDCFWD-3
Items
Symbol Min.
Max. Unit Condition
Power voltage
Operating Temperature
DVDD
AVDD
VGH
VGL
VGH -VGL
TOP
-0.3
6.5
-0.3
-20.0
-
-20
5.0
13.5
40.0
0.3
40.0
60
V
V
V
V
V
°C No Condensation
Storage Temperature
TST -30 80 °C No Condensation
Note:
*1. This rating applies to all parts of the module. And should not be exceeded.
*2. The operating temperature only guarantees operation of the circuit. The contrast, response speed,
and the other specification related to electro-optical display quality is determined at the room temperature, TOP=25.
*3. Ambient temperature when the backlight is lit (reference value)
*4. 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.
6. Electrical Characteristics
6.1 DC Characteristics
Items
Symbol Min. Typ. Max. Unit Remark
DVDD 3.0 3.3 3.6
V *2
Power voltage
AVDD
VGH
10.2
14.5
10.4
15.0
10.6
15.5
V
V
VGL -10.5 -10.0 -9.5
V
Input signal voltage
VCOM
3.54 4.04 4.54
V
Input logic high voltage
Input logic low voltage
VIH
VIL
0.7VDD
0
-
-
DVDD
0.3DVDD
V
V
*3
Note:
*1.Be sure to apply DVDD and VGL to the LCD first, and then apply VGH.
*2: DVDD setting should match the signals output voltage (refer to Note 3) of customer’s system board.
*3: DCLK,HS,VS,RESET,U/D, L/R,DE,R0~R7,G0~G7,B0~B7,MODE,DITHB.
6.2 Current Consumption
Items
Current for Driver
Symbol
IGH
IGL
IDVDD
IAVDD
Min.
0.05
0.2
1
5
Typ.
0.2
0.2
4.0
20
Max.
1.0
1.0
10
50
Unit
mA
mA
mA
mA
Remark
VGH = 15.0V
VGL = -10.0V
DVDD=3.3V
AVDD=10.4V
6.3 LED Backlight Circuit Characteristics
Items
Symbol MIN. TYP. MAX. Unit Note
Forward Voltage
Vf 8.8
10.5 V
Forward Current
If - 230 - mA
Cautions:
Exceeding the recommended driving current could cause substantial damage to the backlight and shorten its lifetime.
Top=25
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6.4 Power Sequence
6.4.1 Power on:
LCD Module User Manual
LMT070DDCFWD-3
6.4.2 Power off:
DVDD VGLAVDDVGHDataB/L
B/L DataVGHAVDD VGLDVDD
Note :Data include R0~R7,B0~B7,G0~G7,U/D,L/R,DCLK,HS,VS,DE.
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7. AC Characteristics
7.1 Timing Characteristics
Item
Symbol
HS setup time
HS hold time
Thst
Thhd
VS setup time
Tvst
VS hold time
Tvhd
Data setup time
Data hole time
Tdsu
Tdhd
DE setup time
Tesu
DVDD Power On Slew rate
TPOR
DCLK cycle time
DCLK pulse duty
Tcph
Tcwh
MIN.
8
8
8
8
8
8
8
-
20
40
TYP.
-
-
-
-
-
-
-
-
-
50
MAX.
-
-
-
-
-
-
-
20
-
60
Note: For the details of the timing, please see the Driver IC data sheet.
Unit
ns
ns
ns
ns
ns
ns
ns
ms
ns
%
Remark
From 0 to 90%
DVDD
7.2 Input Clock and Data Timing Diagram
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7.3 Timing
Item
Horizontal Display Area
DCLK Frequency
One Horizontal Line
HS pulse width
HS Blanking
HS Front Porch
Vertical Display Area
VS period time
VS pulse width
VS Blanking
VS Front Porch
LCD Module User Manual
LMT070DDCFWD-3
Symbol MIN.
thd -
fclk 26.4
th 862
thpw
1
thb 46
thfp 16
tvd -
tv 510
tvpw
1
tvb 23
tvfp 7
TYP. MAX.
800 -
33.3 46.8
1056 1200
- 40
46 46
210 354
480 -
525 650
- 20
23 23
22 147
Unit
DCLK
MHz
DCLK
DCLK
DCLK
DCLK
TH
TH
TH
TH
TH
Remark
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7.4 Data Input Format
LCD Module User Manual
LMT070DDCFWD-3
Figure 6-4-1 Horizontal input timing diagram.
Figure 6-4-2 Vertical input timing diagram.
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7.5 Optical Characteristics
Item
Viewing angle
(CR10)
Response Time
Contrast ratio
Color chromaticlty
Luminance
Luminance uniformity
Symbol
θL
θR
θT
θB
Tf
Tr
CR
WX
WY
L
YU
Condition
9 o’clock
3 o’clock
12 o’clock
6 o’clock
Normal
θ=0o
MIN.
60
60
40
60
-
-
400
0.26
0.28
-
70
TYP.
70
70
50
70
10
15
500
0.31
0.33
900
75
Note:
*1. Definition of Contrast Ratio
The contrast ratio could be calculate by the following expression:
Contrast Ratio (CR) = Luminanc with all pixels white / Luminance with all pixels black
*2 Definition of Viewing Angle
MAX.
-
-
-
-
20
30
-
0.26
0.38
-
-
UNIT
degree
msec
msec
-
-
-
cd/m2
%
Note.
*2
*3
*1
*4
*4
*3 Definition of response time
*4 Definition of Luminance Uniformity
Luminance uniformity (Lu)=
Min. Luminance form pt1~pt9 / Max Luminance form Pt1~pt9
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8. Precautions of using LCD Modules
Mounting
- Mounting must use holes arranged in four corners or four sides.
- The mounting structure so provide even force on to LCD module. Uneven force (ex. Twisted stress)
should not applied to the module. And the case on which a module is mounted should have sufficient
strength so that external force is not transmitted directly to the module.
- It is suggested to attach a transparent protective plate to the surface in order to protect the polarizer.
It should have sufficient strength in order to the resist external force.
- The housing should adopt radiation structure to satisfy the temperature specification.
- Acetic acid type and chlorine type materials for the cover case are not desirable because the former
generates corrosive gas of attacking the polarizer at high temperature and the latter causes circuit
break by electro-chemical reaction.
- Do not touch, push or rub the exposed polarizers with glass, tweezers or anything harder than HB
pencil lead. Never rub with dust clothes with chemical treatment. Do not touch the surface of
polarizer for bare hand or greasy cloth.(Some cosmetics deteriorate the polarizer.)
- When the surface becomes dusty, please wipe gently with absorbent cotton or other soft materials
like chamois soaks with petroleum benzine. Normal-hexane is recommended for cleaning the
adhesives used to attach front / rear polarizers. Do not use acetone, toluene and alcohol because
they cause chemical damage to the polarizer.
- Wipe off saliva or water drops as soon as possible. Their long time contact with polarizer
Operating
- The spike noise causes the mis-operation of circuits. It should be within the ±200mV level (Over and
under shoot voltage)
- Response time depends on the temperature.(In lower temperature, it becomes longer.)
- Brightness depends on the temperature. (In lower temperature, it becomes lower.) And in lower
temperature, response time(required time that brightness is stable after turned on) becomes longer.
- Be careful for condensation at sudden temperature change. Condensation makes damage to
polarizer or electrical contacted parts. And after fading condensation, smear or spot will occur.
- When fixed patterns are displayed for a long time, remnant image is likely to occur.
- Module has high frequency circuits. Sufficient suppression to the electromagnetic interference shall
be done by system manufacturers. Grounding and shielding methods may be important to minimized
the interference
Electrostatic Discharge Control
Since a module is composed of electronic circuits, it is not strong to electrostatic discharge. Make certain
that treatment persons are connected to ground through wrist band etc. And don’t touch interface pin
directly.
Strong Light Exposure
Strong light exposure causes degradation of polarizer and color filter.
Storage
When storing modules as spares for a long time, the following precautions are necessary.
- Store them in a dark place. Do not expose the module to sunlight or fluorescent light. Keep the
temperature between 5°C and 35°C at normal humidity.
- The polarizer surface should not come in contact with any other object. It is recommended that they
be stored in the container in which they were shipped.
Protection Film
- When the protection film is peeled off, static electricity is generated between the film and polarizer.
This should be peeled off slowly and carefully by people who are electrically grounded and with well
ion-blown equipment or in such a condition, etc.
- The protection film is attached to the polarizer with a small amount of glue. If some stress is applied
to rub the protection film against the polarizer during the time you peel off the film, the glue is apt
tore main on the polarizer. Please carefully peel off the protection film without rubbing it against the
polarizer.
- When the module with protection film attached is stored for a long time, sometimes there remains a
very small amount of glue still on the polarizer after the protection film is peeled off.
- You can remove the glue easily. When the glue remains on the polarizer surface or its vestige is
recognized, please wipe them off with absorbent cotton waste or other soft material like chamois
soaked with normal-hexane.
Transportation
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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