LMT070DDCFWD-2

LMT070DDCFWD-2

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

Lin Li

Date: 2018-10-12

Date:

Rev. Descriptions

Release Date

0.1

Preliminary release

2018-10-12

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 1 of 11

TOPWAY

LCD Module User Manual

LMT070DDCFWD-2

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

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 2 of 11

TOPWAY

LCD Module User Manual

LMT070DDCFWD-2

1. Applications

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 :

Digital 24-bits RGB

Display Technology :

a-Si TFT active matrix

Display Mode :

TN Type Full Color / Transmissive / Normal White

Screen Size(Diagonal) :

7.0”

Outline Dimension :

164.9 x 100.0 x 6.8 (mm)

(see attached drawing for details)

Active Area :

154.08 x 85.92 (mm)

Number of dots :

800 x 3 (RGB) x 480

Pixel Pitch :

0.1926 x 0.179 (mm)

Pixel Configuration :

RGB Stripe

Backlight :

LED

Viewing Direction :

6 o’clock(Gray scale Inversion) (*1)

12 o’clock (*2)

Operating Temperature :

-20 ~ +70°C

Storage Temperature :

-30 ~ +80°C

Surface Treatment :

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

7’’ TFT Panel

DCLK

DE, HS, V

MODE

DITHB

R0~R7, G0~G7, B0~B7

Source Driver

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 3 of 11

TOPWAY

LCD Module User Manual

LMT070DDCFWD-2

4. Terminal Function

4.1

K1 TFT Input Terminal

Pin No.

Pin Name

I/O

Descriptions

V LED+

Power

Positive Backlight Power Supply

V LED-

Power

Negative Backlight Power Supply

GND

Power

Power GND (0V)

V COM

Input

Common voltage

DV DD

Power

Power for Digital Circuit

MODE

Input

DE/SYNC mode select (*1)

Input

Data input enable

Input

Vertical Sync Input

Input

Horizontal Sync Input

Input

8bit Data for Blue

Input

8bit Data for Green

Input

8bit Data for Red

GND

Power

Power GND (0V)

DCLK

Input

Sample clock(*2)

GND

Power

Power GND (0V)

L/R

Input

Left / right selection (*3)

U/D

Input

Up/down selection (*3)

V GH

Power

Gate ON Voltage

V GL

Power

Gate OFF Voltage

AV DD

Power

Power for Analog Circuit

RESET

Input

Global reset pin (*4)

No connection

V COM

Input

Common Voltage

DITHB

Input

Dithering function (*5)

GND

Power

Power GND (0V)

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

Scanning direction

GND

DV DD

Up to down, left to right

DV DD

GND

Down to up, right to left

GND

Up to down, right to left

DV DD

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.

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 4 of 11

TOPWAY

LCD Module User Manual

LMT070DDCFWD-2

5. Absolute Maximum Ratings

Items

Symbol

Min.

Max.

Unit

Condition

DV DD

-0.3

5.0

AV DD

6.5

13.5

Power voltage

V GH

-0.3

40.0

V GL

-20.0

0.3

V GH - V GL

40.0

Operating Temperature

T OP

-20

 C

No Condensation

Storage Temperature

T ST

-30

 C

No Condensation

High Temperature High

60  C,90%RH, 72h

No Condensation

Humidity Storage test

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, T OP =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.

*5. Before cosmetic and function test, the product must have enough recovery time, at least 24 hours at room temperature ， with no

condensation

6. Electrical Characteristics

6.1 DC Characteristics

Items

Symbol

Min.

Typ.

Max.

Unit

Remark

DV DD

3.0

3.3

3.6

Power voltage

AV DD

10.2

10.4

10.6

V GH

14.5

15.0

15.5

V GL

-10.5

-10.0

-9.5

Input signal voltage

V COM

3.54

4.04

4.54

Input logic high voltage

V IH

0.7VDD

DV DD

Input logic low voltage

V IL

0.3DV DD

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

Symbol

Min.

Typ.

Max.

Unit

Remark

I GH

0.05

0.2

1.0

V GH = 15.0V

Current for Driver

I GL

0.2

0.5

1.0

V GL = -10.0V

IDV DD

4.0

DV DD =3.3V

IAV DD

AV DD =10.4V

6.3 LED Backlight Circuit Characteristics

Top=25 ℃

Items

Symbol

MIN.

TYP.

MAX.

Unit

Note

Forward Voltage

9.0

9.6

10.5

If=180mA

Forward Current

180.0

Cautions:

Exceeding the recommended driving current could cause substantial damage to the backlight and shorten its lifetime.

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 5 of 11

TOPWAY

LCD Module User Manual

LMT070DDCFWD-2

6.4 Power Sequence

6.4.1 Power on:

DV DD → VGL → AVDD → VGH → Data → B/L

6.4.2 Power off:

B/L → Data → VGH → AVDD → VGL → DV DD

Note :Data include R0~R7,B0~B7,G0~G7,U/D,L/R,DCLK,HS,VS,DE.

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 6 of 11

TOPWAY

LCD Module User Manual

LMT070DDCFWD-2

7. AC Characteristics

7.1 Timing Characteristics

Item

Symbol

MIN.

TYP.

MAX.

Unit

Remark

HS setup time

Thst

HS hold time

Thhd

VS setup time

Tvst

VS hold time

Tvhd

Data setup time

Tdsu

Data hole time

Tdhd

DE setup time

Tesu

DV DD Power On Slew rate

TPOR

From 0 to 90%

DV DD

DCLK cycle time

Tcph

DCLK pulse duty

Tcwh

Note: For the details of the timing, please see the Driver IC data sheet.

7.2 Input Clock and Data Timing Diagram

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 7 of 11

TOPWAY

LCD Module User Manual

LMT070DDCFWD-2

7.3 Timing

Item

Symbol

MIN.

TYP.

MAX.

Unit

Remark

Horizontal Display Area

thd

800

DCLK

DCLK Frequency

fclk

26.4

33.3

46.8

MHz

One Horizontal Line

862

1056

1200

DCLK

HS pulse width

thpw

DCLK

HS Blanking

thb

DCLK

HS Front Porch

thfp

210

354

DCLK

Vertical Display Area

tvd

480

VS period time

510

525

650

VS pulse width

tvpw

VS Blanking

tvb

VS Front Porch

tvfp

147

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 8 of 11

TOPWAY

LCD Module User Manual

LMT070DDCFWD-2

7.4 Data Input Format

Figure 6-4-1 Horizontal input timing diagram.

Figure 6-4-2 Vertical input timing diagram.

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 9 of 11

TOPWAY

LCD Module User Manual

LMT070DDCFWD-2

7.5 Optical Characteristics

Item

Symbol

Condition

MIN.

TYP.

MAX.

UNIT

Note.

θ L

9 o’clock

Viewing angle

θ R

3 o’clock

(CR ≥ 10)

degree

θ T

12 o’clock

θ B

6 o’clock

T f

msec

Response Time

T r

msec

Contrast ratio

400

500

Normal

W X

0.26

0.31

0.26

Color chromaticlty

θ=0 o

W Y

0.28

0.33

0.38

Luminance

500

cd/m 2

Luminance uniformity

Y U

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

*3 Definition of response time

*4 Definition of Luminance Uniformity

Luminance uniformity (Lu)=

Min. Luminance form pt1~pt9 / Max Luminance form Pt1~pt9

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 10 of 11

TOPWAY

LCD Module User Manual

LMT070DDCFWD-2

8. Precautions of using LCD Modules

Please refer to "LCD-Module-Design-Handling-Precaution.pdf".

URL: www.topwaydisplay.com

Document Name:LMT070DDCFWD-2-Manual-Rev0.1

Page: 11 of 11