LMT121DNGFWD-1

LMT121DNGFWD-1

LCD Module User Manual

Prepared by:

Checked by:

Approved by:

Liu

Date: 2019-03-27

Date:

Rev. Descriptions

Release Date

0.1

Preliminary

2019-03-27

URL: www.topwaydisplay.com

Document Name: LMT121DNGFWD-1-Manual-Rev0.1

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LCD Module User Manual

LMT121DNGFWD-1

Table of Content

1. General Specification ............................................................................................................ 3

2. Block Diagram ........................................................................................................................ 3

3. Input/Output Terminals .......................................................................................................... 4

3.1

TFT LVDS Input Terminals (K1) ............................................................................................................................. 4

3.2

BackLight Terminals (K2) ....................................................................................................................................... 4

3.3

Control Board LVDS Output Terminal (K4) ............................................................................................................ 4

3.4

HDMI Terminals (K7) ............................................................................................................................................. 5

3.5

Backlight Voltage Terminal (K12) ........................................................................................................................... 5

3.6

Power Supply Terminals (K13)............................................................................................................................... 5

4. Absolute Maximum Ratings .................................................................................................. 5

5. Electrical Characteristics ...................................................................................................... 6

5.1

Driving TFT LCD Panel .......................................................................................................................................... 6

5.2

Power supply voltage Sequence ............................................................................................................................ 6

6. Optical Characteristics .......................................................................................................... 7

7. Touch panel Design Precautions .......................................................................................... 9

8. Precautions of using LCD Modules .................................................................................... 10

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Document Name: LMT121DNGFWD-1-Manual-Rev0.1

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1. General Specification

Signal Interface :

HDMI

Display Technology :

a-Si TFT active matrix

Display Mode :

TN Type Full Color / Transmissive / Normal White

Screen Size :

12.1 inch (Diagonal)

Outline Dimension :

279.0x209.0x9.0 (mm)

(see Outline DWG for details)

Active Area :

245.76 x184.32 (mm)

Number of dots :

1024 x 768

Dot Pitch :

0.240 x 0.240(mm)

Pixel Configuration :

R.G.B. Vertical Stripe

Backlight :

White LED

Surface Treatment :

Anti-Glare

Viewing Direction :

6 o’clock

Operating Temperature :

0 ~ +50°C

Storage Temperature :

-10 ~ +60°C

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.

2. Block Diagram

12.1’’ TFT Module

20 1

Signals

Backlight

K12

Control Board

K13

HDMI Input

12V Power Supply Input

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LCD Module User Manual

LMT121DNGFWD-1

3. Input/Output Terminals

3.1 TFT LVDS Input Terminals (K1)

Pin No. Pin Name

Descriptions

24Bit Mode

18Bit Mode

VCC

Power TFT Power Input (3.3V)

GND

Power Ground

FRC

Input

H:8Bits LVDS Input

L/NC: 6Bits LVDS Input

(24bit mode)

(18bit mode)

RIN0-

Input LVDS receiver negative signal channel 0

RIN0+

Input LVDS receiver positive signal channel 0

GND

Power Ground

RIN1-

Input LVDS receiver negative signal channel 1

RIN1+

Input LVDS receiver positive signal channel 1

GND

Power Ground

RIN2-

Input LVDS receiver negative signal channel 2

RIN2+

Input LVDS receiver positive signal channel 2

GND

Power Ground

CLKIN-

Input LVDS receiver negative signal clock

CLKIN+

Input LVDS receiver positive signal clock

GND

Power Ground

RIN3-

Input

LVDS receiver negative signal channel 3.(Used for 8Bits LVDS

Input; GND for 6Bits)

RIN3+

Input

LVDS receiver positive signal channel 3.(Used for 8Bits LVDS

Input; GND for 6Bits)

DPS

Input

Display Reversed Function

(H: Display Reverse; L/NC: Normal Display)

No Connection

3.2 BackLight Terminals (K2)

Pin No. Pin Name

Descriptions

No Connection

BLADJ

Input

Backlight dimming control

PWM may be used to adjust the output brightness

BLEN

Input

Backlight Driver Control

BLEN=Hi, Backlight enable; BLEN=Lo, Backlight disable.

BLGND

Power Power Supply GND (0V)

BLVCC

Power Positive Power Supply

3.3 Control Board LVDS Output Terminal (K4)

Pin No. Pin Name I/O

Descriptions

1-3

VCC

Power TFT Power Output (3.3V)

4-6

GND

Power Power Supply GND (0V)

TXD0-

Output

TXD0+

Output

LVDS Ch0 signal

TXD1-

Output

TXD1+

Output

LVDS Ch1 signal

TXD2-

Output

TXD2+

Output

LVDS Ch2 signal

13-14

GND

Power Power Supply GND (0V)

TXDC-

Output

TXDC+

Output

LVDS Clk signal

17-30

Reserved, leave open

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LMT121DNGFWD-1

3.4 HDMI Terminals (K7)

Pin No.

Pin Name

I/O

Descriptions

TMDS_D2+

Input

HDMI receiver positive signal channel 2

TMDS_D2 Shield

Power

Power Supply GND (0V)

TMDS_D2 -

Input

HDMI receiver negative signal channel 2

TMDS_D1+

Input

HDMI receiver positive signal channel 1

TMDS_D1 Shield

Power

Power Supply GND (0V)

TMDS_D1 -

Input

HDMI receiver negative signal channel 1

TMDS_D0+

Input

HDMI receiver positive signal channel 0

TMDS_D0 Shield

Power

Power Supply GND (0V)

TMDS_D0 -

Input

HDMI receiver negative signal channel 0

TMDS_Clock+

Input

HDMI receiver positive signal clock

TMDS_Clock Shield Power

Power Supply GND (0V)

TMDS_Clock-

Input

HDMI receiver negative signal clock

No connection

SCL_HDMI

Input

Serial data clock

SDA_HDMI

I/O

Serial data out

GND

Power

Power Supply GND (0V)

+5_Power

Power

Power supply for DDC memory

Hot_Plug_Detect

Output Hot Plug Detect signal

3.5 Backlight Voltage Terminal (K12)

Pin No. Pin Name

I/O

Descriptions

No Connection

VSS

Power

Power Supply VSS （ 0V ）

PWM

Output

Backlight Control Signal （ PWM ） (Active High) (*1)

BLEN

Output

Backlight Enable Signal (Active High) （ *1 ）

12V(VDD)

Power

Power Supply for TFT （ 12V ）

No Connection

3.6 Power Supply Terminals (K13)

Pin No. Pin Name

Descriptions

12V(VDD)

Power Positive Power Supply(+12V)

Backlight Driver Control (default: BLEN = Hi)

NC(BLEN)

Input BLEN=Hi, Backlight Driving Booster enable

BLEN=Lo, Backlight Driving Booster disable

PWM

Input

Backlight dimming control (default: PWM = 100%)

PWM may be used to adjust the output brightness

VSS

Power Power Supply VSS (0V)

4. Absolute Maximum Ratings

Items

Symbol

MIN.

MAX.

Unit

Condition

Power supply voltage

VDD

-0.3

V VSS = 0V

PWM or BLEN Voltage

-0.3

5.5

V VSS = 0V

Operation Temperature

T op

℃

No Condensation

Storage Temperature

T st

-10

℃

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.

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5. Electrical Characteristics

5.1 Driving TFT LCD Panel

V VSS =0V, V DD =12.0V, T OP =25 ℃

Items

Symbol

MIN.

TYP.

MAX.

Unit

Note

Power supply voltage

VDD

11.0

12.0

13.0

VDD

Power supply current

I VDD

550

650

750

PWM Input Frequency

f PWM

200

20k

Input high voltage

V IH

2.0

3.3

Input low voltage

V IL

0.8

PWM,BLEN

PWM pulse width

tPWH

PWM duty ratio

DR PWM

100

*3,*4

*1: All black pattern.

*2: Depending on the frequency used ,some noise may appear on the screen,please conduct a thorough

evaluation,

*3: While the BLEN signal is high ,do not set the tPWH(PWM pulse width ) is less than 5us .It may cause

abnormal working is the backlight .In this case,turn the backlight off and then on again by BLEN signal.

*4: Regardless of the PWM frequency,both PWM duty radio and PWM pulse width must be always more than

the minimum values.

5.2 Power supply voltage Sequence

Note1:The backlight should be turned on within the valid period of display and function signals,in order to

avoid unstable data display.

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LMT121DNGFWD-1

6. Optical Characteristics

(Note*1,*2)

Measuring

Parameter

Condition

Symbol min.

typ.

max.

Unit

instrument

Remarks

White at center

Luminance

cd/m2 BM-5A

θ R = 0 o , θ L = 0 o , θ U = 0 o , θ D = 0 o 

300

450

White/Black at center

Contrast ratio

θ R = 0 o , θ L = 0 o , θ U = 0 o , θ D = 0 o 

500

700

BM-5A

Note3

White

Luminance uniformity

θ R = 0 o , θ L = 0 o , θ U = 0 o , θ D = 0 o 

1.25

(1.33)

BM-5A

Note6

x coordinate

0.263 0.313 0.363

White

y coordinate

0.279 0.329 0.379

x coordinate

TBD

Red

y coordinate

TBD

x coordinate

TBD

Chromaticity

Green

y coordinate

TBD

x coordinate

TBD

SR-3

Note5

Blue

y coordinate

TBD

θ R = 0 o , θ L = 0 o , θ U = 0 o , θ D = 0 o

Color gamut

at center, against NTSC color space

White to Black

Ton

(3)

(5)

BM-5A

Note4

Response time

Black to White

Toff

(5)

(8)

-10000

Right

θ U = 0 o , θ D = 0 o ,CR ≥ 10

θ R

o 

Left

θ U = 0 o , θ D = 0 o ,CR ≥ 10

θ L

o 

Viewing angle

θ R = 0 o , θ L = 0 o ,CR ≥ 10

θ U

o 

Note2

Contrast

Down

θ R = 0 o , θ L = 0 o ,CR ≥ 10

θ D

o 

Note:

*1. The value above are initial Characteristics.

* 2: Measurement conditions are as follows.

Ta= 25 ℃ , VDD= 12.0V, PWM duty ratio: 100%,

Display mode: XGA, Horizontal cycle= 1/48.363kHz, Vertical cycle= 1/60.0Hz,

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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

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. Touch panel Design Precautions

1. It should prevent front case

touching the touch panel

Active Area (A.A.) to prevent

abnormal touch.

It should left gab (e.g.

0.2~0.3mm) in between.

2. Outer case design should take care about the area outside the A.A.

Those areas contain circuit wires which is having different thickness. Touching those areas could de-

form the ITO film. As a result case the ITO cold be damaged and shorten its lifetime.

It is suggested to protect those areas with gasket (between the front case and the touch panel).

The suggested figures are B≥0.50mm; C≥0.50mm 。

3. The front case side wall should keep space

(e.g. 0.2 ~ 0.3mm) from the touch panel.

4. In general design,

touch panel V.A. should be bigger than the LCD V.A.

and touch panel A.A. should be bigger than the LCD A.A.

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8. Precautions of using LCD Modules

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

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