TOPWAY LMT070DICFWD-NDA-2 LCD Module User Manual

TOPWAY LMT070DICFWD-NDA-2 LCD Module

LCD Module User Manual

• Product Name: LMT070DICFWD-NDA-2
• Prepared by: Cai Siqing
• Date: 2023-05-29
• URL: www.topwaydisplay.com

General Specification

• Signal Interface: LVDSVESA 24 bit
• Display Mode: LMT070DICFWD-NDA-2
• Screen Size(Diagonal): Not specified
• Outline Dimension: Not specified
• Active Area: Not specified
• Number of dots: 800(x3) x 480 pixels
• Pixel Pitch: Not specified
• Pixel Configuration: Not specified
• Backlight: Not specified
• Viewing Direction: Not specified
• Touch Panel: Not specified
• Operating Temperature: Not specified
• Storage Temperature: Not specified
• Surface Treatment: Not specified

Block Diagram
The block diagram shows the various components of the LCD module, including the touch panel, backlight, gate driver, source driver, LVDS interface, and power circuit.

Terminal Function
The terminal functions are divided into two parts – K1 LVDS Terminal and K2 Backlight Terminal.

K1 LVDS Terminal
The K1 LVDS Terminal has 20 pins and is used for 24-bit input. It also has a power positive and power supply selection of scanning mode. The scanning direction can be set to up to down, left to right, down to up, right to left, or up to down, right to left.

K2 Backlight Terminal
The K2 Backlight Terminal has 4 pins and is used for backlight dimming control. The PWM signal may be used to adjust the output brightness, and the backlight driver control can be enabled or disabled.

Absolute Maximum Ratings
The absolute maximum ratings are not specified in the user manual.

Electrical Characteristics
The electrical characteristics include the following:

• Power Supply Voltage: 3.0V (Typ.)
• Power Consumption: Not specified
• Signal Voltage: Not specified
• Signal Current: Not specified
• Timing Characteristics: Not specified
• Input Impedance: Not specified
• Output Impedance: Not specified

AC Characteristics
The AC characteristics include the following:

• Response Time: Not specified
• Contrast Ratio: Not specified
• Brightness: Not specified
• Viewing Angle: Not specified

Product Usage Instructions

The LMT070DICFWD-NDA-2 LCD module is designed to be used in a variety of applications that require high-quality display capabilities. To use the module, follow these instructions:

1. Connect the LVDS interface to the K1 LVDS Terminal.
2. Connect the backlight control to the K2 Backlight Terminal.
3. Apply power to the module and ensure that the voltage levels are within the specified range.
4. Configure the scanning mode and scanning direction using the K1 LVDS Terminal.
5. Adjust the output brightness using the PWM signal connected to the K2 Backlight Terminal.
6. Display your content on the module and adjust the viewing angle as needed.

General Specification

• Signal Interface : LVDS（VESA 24 bit）
• Display Mode : Transmissive / Normal White
• Screen Size(Diagonal) : 7.0”
• Outline Dimension : 190.0 x 112.0x 13.3 (mm) (see attached drawing for details)
• Active Area : 154.08 x 85.92 (mm)
• Number of dots : 800 x 480
• Pixel Pitch : 0.1926 x 0.179 (mm)
• Pixel Configuration : RGB Stripe
• Backlight : White LED
• Viewing Direction : 6 o’clock
• Touch Panel: 4-wire resistive
• Operating Temperature : -20 ~ +70°C
• Storage Temperature : -30 ~ +80°C
• Surface Treatment : Anti-Glare Treatment

Block Diagram

Terminal Function

K1 LVDS Terminal

24Bit
1| RX3+| Input| LVDS receiver positive signal channel 3
2| RX3-| Input| LVDS receiver negative signal channel 3
3| NC| –| No connection
4| NC| –| No connection
5| GND| Power| Ground
6| RXC+| Input| LVDS receiver positive signal clock
7| RXC-| Input| LVDS receiver negative signal clock
8| GND| Power| Ground
9| RX2+| Input| LVDS receiver positive signal channel 2
10| RX2-| Input| LVDS receiver negative signal channel 2
11| GND| Power| Ground
12| RX1+| Input| LVDS receiver positive signal channel 1
13| RX1-| Input| LVDS receiver negative signal channel 1
14| GND| Power| Ground
15| RX0+| Input| LVDS receiver positive signal channel 0
16| RX0-| Input| LVDS receiver negative signal channel 0
17| LR| Input| Display X-Flip Setting (1)
18| UD| Input| Display Y-Flip Setting (1)
19| VCC_IN| Power| Positive Power Supply
20| VCC_IN

Note:   Selection of scanning mode

K2 Backlight Terminal

PWM may be used to adjust the output brightness(*1)

3

| ****

BL_EN

| ****

Input

| Backlight Driver Control

BLEN=Hi, Backlight Driving Booster enable BLEN=Lo, Backlight Driving Booster disable

4| BL_GND| Power| Power Supply GND (0V)

Note

• PWM signal vs brightness is non-linear;
  • lower PWM signal might provide vary brightness on module.
  • 100% PWM signal could provide guaranteed typical brightness.

Touch Panel Terminal

Absolute Maximum Ratings

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.

Electrical Characteristics

Driving TFT LCD Panel

VCMLVDS

|

–

|

3.0

|

–

| V| Note1
Sync Frequency| FVD| –| 60| 70| Hz|
VCC_IN Power Consumption| IVCC_IN| –| 100| 250| mA|

Note1: The value may be different for different LCM.

LED Backlight Circuit Characteristics

Parameter| Symbo l| MIN.| TYP.| MAX.| Unit| Note
---|---|---|---|---|---|---
Operating Voltage| BL_VI| 11.5| 12.0| 12.5| V|
Input High Voltage| VIH| 3.0| –| BL_VI| V| BL_EN, BL_ADJ
Input Low Voltage| VIL| BL_GND| –| 0.3| V| BL_EN, BL_ADJ
Operating Current| IBL_VI| –| 110| 275| mA| BL_VI

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

Note:

• BL_EN=Hi, BL_ADJ=Hi;
• Recommended BL_ADJ PWM Freq. is 3kHz
•  Terminal circuit（Fig.1） :

  ---

Touch panel Characteristics

Note1: Exceeding the recommended Condition could cause substantial damage to the touch panel and shorten its lifetime.
Note2: Before cosmetic and function test, the product must have enough recovery time, at least 24 hours at room temperature.

Touch Panel Logic Details

Power On/Off Sequence

AC Characteristics

LVDS Input Timing Conditions

Item| Symbol| MIN.| TYP.| MAX.| Unit| Condition
---|---|---|---|---|---|---
CLK OUT Period| tRCP| 11.8| T| 66.6| ns| VCC=3.0~3.6V
CLK OUT HIGH TIME| tRCH|  | 4T/7|  | ns|
CLK OUT LOW TIME| tRCL|  | 3T/7|  | ns|
RCLK+/- to CLK OUT Delay| tRCD|  | 5T/7|  | ns|
TTL Data Setup to CLK OUT| tRS| 0.35T-0.3|  |  | ns|
TTL Data Hold From CLK OUT| tRH| 0.45T-1.6|  |  | ns|
Input Data Position 0

(T =11.76ns )

| tRIP1| -0.4| 0| +0.4| ns|
Input Data Position 1 (T = 11.76ns )| tRIP0| T/7-0.4| T/7| T/7+0.4| ns|
Input Data Position 2 (T = 11.76ns )| tRIP6| 2T/7-0.4| 2T/7| 2T/7+0.4| ns|
Input Data Position 3 (T = 11.76ns )| tRIP5| 3T/7-0.4| 3T/7| 3T/7+0.4| ns|
Input Data Position 4 (T = 11.76ns )| tRIP4| 4T/7-0.4| 4T/7| 4T/7+0.4| ns|
Input Data Position 5 (T = 11.76ns )| tRIP3| 5T/7-0.4| 5T/7| 5T/7+0.4| ns|
Input Data Position 6 (T = 11.76ns )| tRIP2| 6T/7-0.4| 6T/7| 6T/7+0.4| ns|

LVDS Timing Diagram

Data Input 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| th| 862| 1056| 1200| DCLK|
HS pulse width| thpw| 1| –| 40| DCLK|
HS Blanking| thb| 46| 46| 46| DCLK|
HS Front Porch| thfp| 16| 210| 354| DCLK|
Vertical Display Area| tvd| –| 480| –| TH|
VS period time| tv| 510| 525| 650| TH|
VS pulse width| tvpw| 1| –| 20| TH|
VS Blanking| tvb| 23| 23| 23| TH|
VS Front Porch| tvfp| 7| 22| 147| TH|

Data Input Format

Optical Characteristics

Item| Symbol| Condition| MIN.| TYP.| MAX.| UNIT| Note.
---|---|---|---|---|---|---|---

Viewing angle (CR≥10)

| θL| 9 o’clock| 60| 70| –| ****

degree

| ****

*2

θR| 3 o’clock| 60| 70| –
θT| 12 o’clock| 40| 50| –
θB| 6 o’clock| 60| 70| –

Response Time

| Tf| ****

Normal θ=0o

| –| 10| 20| msec| ****

*3

Tr| –| 15| 30| msec
Contrast ratio| CR| 400| 500| –| –| ****

*1

Color chromaticlty| WX| 0.26| 0.31| 0.26| –
WY| 0.28| 0.33| 0.38| –
Luminance| L| –| 225| –| cd/m2| 4
Luminance uniformity| YU| 70| 75| –| %| 4

Note:

• 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

• Definition of Viewing Angle

LCD Module Design and Handling Precautions

• Please ensure V0, VCOM is adjustable, to enable LCD module get the best contrast ratio under different temperatures, view angles and positions.
• Normally display quality should be judged under the best contrast ratio within viewable area. Unexpected display pattern may com out under abnormal contrast ratio.
• Never operate the LCD module exceed the absolute maximum ratings.
• Never apply signal to the LCD module without power supply.
• Keep signal line as short as possible to reduce external noise interference.
• IC chip (e.g. TAB or COG) is sensitive to light. Strong light might cause malfunction. Light sealing structure casing is recommended.
• Make sure there is enough space (with cushion) between case and LCD panel, to prevent external force passed on to the panel; otherwise that may cause damage to the LCD and degrade its display result.
• Avoid showing a display pattern on screen for a long time (continuous ON segment).
• LCD module reliability may be reduced by temperature shock.
• When storing and operating LCD module, avoids exposure to direct sunlight, high humidity, high or low temperature. They may damage or degrade the LCD module.
• Never leave LCD module in extreme condition (max./min storage/operate temperature) for more than 48hr.
• Recommend LCD module storage conditions is 0 C~40 C <80%RH.
• LCD module should be stored in the room without acid, alkali and harmful gas.
• Avoid dropping & violent shocking during transportation, and no excessive pressure press, moisture and sunlight.
• LCD module can be easily damaged by static electricity. Please maintain an optimum anti-static working environment to protect the LCD module. (eg. ground the soldering irons properly)
• Be sure to ground the body when handling LCD module.
• Only hold LCD module by its sides. Never hold LCD module by applying force on the heat seal or TAB.
• When soldering, control the temperature and duration avoid damaging the backlight guide or diffuser which might degrade the display result such as uneven display.
• Never let LCD module contact with corrosive liquids, which might cause damage to the backlight guide or the electric circuit of LCD module.
• Only clean LCD with a soft dry cloth, Isopropyl Alcohol or Ethyl Alcohol. Other solvents (e.g. water) may damage the LCD.
• Never add force to components of LCD module. It may cause invisible damage or degrade the module’s reliability.
• When mounting LCD module, please make sure it is free from twisting, warping and bending.
• Do not add excessive force on surface of LCD, which may cause the display color change abnormally.
• LCD panel is made with glass. Any mechanical shock (e.g. dropping from high place) will damage the LCD module.
• Protective film is attached on LCD screen. Be careful when peeling off this protective film, since static electricity may be generated.
• Polarizer on LCD gets scratched easily. If possible, do not remove LCD protective film until the last step of installation.
• When peeling off protective film from LCD, static charge may cause abnormal display pattern. The symptom is normal, and it will turn back to normal in a short while.
• LCD panel has sharp edges, please handle with care.
• Never attempt to disassemble or rework LCD module.
• If display panel is damaged and liquid crystal substance 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.

CTP Mounting Instructions

Bezel Mounting (Figure 1)

• The bezel window should be bigger than the CTP active area. It should be≥0.5mm each side.
• Gasket should be installed between the bezel and the CTP surface. The final gap should be about 0.5~1.0mm.
• It is recommended to provide an additional support bracket for backside support when necessary (e.g. slim type TFT module without mounding structure). They should only provide appropriate support and keep the module in place.
• The mounting structure should be strong enough to prevent external uneven force or twist act onto the module.

Surface Mounting (Figure 2)

• As the CTP assembling on the countersink area with double side adhesive.
  The countersink area should be flat and clean to ensure the double side adhesive installation result.

• The Bezel is recommend to keep a gap (≥0.3mm each side) around the cover lens for tolerance.

• It is recommended to provide an additional support bracket with gasket for backside support when necessary (e.g. TFT module without mounding structure). They should only provide appropriate support and keep the module in place.

• The mounting structure should be strong enough to prevent external uneven force or twist act onto the module

Additional Cover Lens Mounting (Figure 3)

• For the case of additional cover Lens mounting, it is necessary to recheck with the CTP specification about the material and thickness to ensure the functionality.
• It should keep a 0.2~0.3mm gap between the cover lens and the CTP surface..
• The cover lens window should be bigger than the active area of the CTP.It should be≥0.5mm each side.
• It is recommended to provide an additional support bracket for backside support when necessary (e.g. slim type TFT module without mounding structure). They should only provide appropriate support and keep the module in place.
• The mounting structure should be strong enough to prevent external uneven force or twist act onto the module.

RTP Mounting Instructions

• It should bezel touching the RTP Active Area (A.A.) to prevent abnormal touch.It should left gab D=0.2~0.3mm in between.
  (Figure 4)

• Outer bezel 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 bezel the ITO film be damaged and shorten its lifetime.
  It is suggested to protect those areas with gasket (between the bezel and RTP).The suggested figures are B≥0.50mm; C≥0.50mm.(Figure 4)

• The bezel side wall should keep space E= 0.2 ~ 0.3mm from the RTP. (Figure 4)

In general design,
RTP V.A. should be bigger than the TFT V.A. and RTP A.A. should be bigger than the TFT A.A.(Figure 5)

Warranty

This product has been manufactured to our company’s specifications as a part for use in your company’s general electronic products. It is guaranteed to perform according to delivery specifications. For any other use apart from general electronic equipment, we cannot take responsibility if the product is used in medical devices, nuclear power control equipment, aerospace equipment, fire and security systems, or any other applications in which there is a direct risk to human life and where extremely high levels of reliability are required. If the product is to be used in any of the above applications, we will need to enter into a separate product liability agreement.

• We cannot accept responsibility for any defect, which may arise form additional manufacturing of the product (including disassembly and reassembly), after product delivery.
• We cannot accept responsibility for any defect, which may arise after the application of strong external force to the product.
• We cannot accept responsibility for any defect, which may arise due to the application of static electricity after the product has passed our company’s acceptance inspection procedures.
• When the product is in CCFL models, CCFL service life and brightness will vary according to the performance of the inverter used, leaks, etc. We cannot accept responsibility for product performance, reliability, or defect, which may arise.
• We cannot accept responsibility for intellectual property of a third part, which may arise through the application of our product to our assembly with exception to those issues relating directly to the structure or method of manufacturing of our product.

URL: www.topwaydisplay.com

References

• 液晶显示模块-7寸显示屏-2.8寸显示屏-液晶屏厂家 | 拓普微科技

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