TOPWAY LMT035KDH03-NJN LCD Module User Manual

TOPWAY LMT035KDH03-NJN LCD Module

• Product Name: LMT035KDH03-NJN
• Prepared by: Caiwei
• Date: 2022-06-08
• URL: www.topwaydisplay.com
• Release Date: 2022-06-08

General Specification

• Screen Size (Diagonal): 3.5 inch
• Active Area: 70.08 x 52.56 (mm)
• Number of Dots: 320(RGB) x 240
• Pixel Pitch: 0.219 x 0.219 (mm)
• Color Depth: For saturated color display content (e.g. pure-red, pure-green, pure-blue or pure-colors-combinations) and for color scales display content.
• Display Technology: LCD
• Display Mode: Transmissive
• Display Interface: 8bit MCU Mode (Default)
• Viewing Direction: 6 o’clock
• Operating Temperature: -20°C to +70°C
• Storage Temperature: -30°C to +80°C

Terminal Functions

Product Usage Instructions

Follow the below instructions for using the LCD module:

1. Connect VSS pin to Power Supply GND (0V).
2. Connect VDD pin to Positive Power Supply.
3. No connection needed for NC pin.
4. Connect /WR pin to Write Enable, active Low.
5. Connect /RD pin to Read Enable, active Low.
6. Connect /CS pin to Chip Select. When /CS is Low, Data IO is enabled.
7. Use the Command Summary in the Function Specifications section to send commands to the LCD module.
8. Refer to the LCD Module Design and Handling Precautions section for important information regarding handling and design of the module.

Prepared by:

Caiwei

| Checked by:| Approved by:
---|---|---

Date: 2022-06-08

|

Date:

|

Date:

General Specification

• Screen Size(Diagonal) : 3.5 inch
• Active Area : 70.08 x 52.56 (mm)
• A number of dots : 320(RGB) x 240
• Pixel Pitch： 0.219 x 0.219 (mm)
• Color Depth: 2bpp
• Display Technology: a-Si TFT active matrix
• Display Mode : Normal White, Transmissive
• Display Interface: MCU Interface
• Viewing Direction : 6 o’clock(Grayscale Inversion) (1)12 o’clock (2)
• Operating Temperature: -20 ~ +70°C
• Storage Temperature: -30 ~ +80°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.

Block Diagram

Terminal Functions

Terminal (K1/K2)

Pin No.(K1)| Pin No.(K2)| Pin Name| I/O| 8bit MCU Mode (Default) Description
---|---|---|---|---
1| 1,2| VSS| Power Input| Power Supply GND (0V)
2| 3,4| VDD| Power Input| Positive Power Supply
3|  | NC| –| No Connect
4| 18| /WR| Input| Write Enable, active Low
5| 17| /RD| Input| Read Enable, active Low
6| 6| /CS| Input| Chip Select /CS=Low: Data IO is enabled

7

|

5

|

A0

|

Input

| Access Mode

A0=High: Accessing Data A0=Low: Accessing Address

8| 7| /RES| Input| Reset

/RES=Low: Reset

/RES=High: Normal operation

9| 8| DB0|

Bi-directional I/O

|

8-bit Bi-directional data bus

:| :| DB1
14| 13| :
15| 14| DB6
16| 15| DB7
17| 16| /WAIT| Output| WAIT Signal
18|  | NC| –| No Connect
19| 19| BL_ADJ| Input| Backlight Driver enable signal, active High, PWM(*1) can be possible
20| 20-24| NC| –| No Connect

Note:
The PWM frequency is between 200Hz and 500Hz

Absolute Maximum Ratings

Caution:
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

Items| Symbol| MIN.| TYP.| MAX.| Unit| Applicable Pin
---|---|---|---|---|---|---
Operating Voltage| VDD| 3.0| 3.3| 3.6| V| VDD
Input High Voltage| VIH| 0.8VD D| –| VDD| V| Input pins, Bi-direction pins
Input Low Voltage| VIL| VSS| –| 0.2VDD| V| Input pins, Bi-direction pins
Operating Current| IDD| –| 155| 200| mA| On Backlight Power on status

DC Characteristics

AC Characteristics
8080 Mode Timing

Note : Tmclk = period of internal MCLK clock signal.

Indirect 8-bit Function Select

Reset Timing

Note:

1. When using an external oscillator, a delay is required following the rising edges of both RESET# and VDD to allow for system stabilization. This delay allows the clock used by the internal oscillator circuit to become stable before use. The delay time depends on a crystal. The S1D13709 must not be accessed before the oscillation circuit is stable.
   When using the internal oscillator with an external crystal, a delay is required after exiting power save mode. For direct mode, writing REG[08h] bit 0 will exit power save mode and start the internal oscillator. For indirect mode, writing the SYSTEM SET command will exit power save mode and start the internal oscillator.

2. The S1D13709 requires a reset pulse of at least 100 ns after power-on in order to re-initialize its internal state. For maximum reliability, it is not recommended to apply a DC voltage to the LCD panel while the S1D13709 is reset. Turn off the LCD power supplies for at least one frame period after the start of the reset pulse.
   Note that during the reset period, the S1D13709 cannot receive commands. Commands to initialize the internal registers should be issued soon after a reset. During reset, the LCD drive signals FPDAT, LP and FR are halted.
   For more information and details please refer to LCD controller (S1D13709) datasheet.

Optical Characteristics

Note ： The parameter may slightly change over temperature, driving voltage and materials.

Note 1:
The data are measured after LEDs are turned on for 5 minutes. LCM displays full white. The brightness is the average value of 9 measured spots. Measurement equipment PR-705 (Φ8mm)

Measuring condition:

• Measuring surroundings: Dark room
• Measuring temperature: Ta=25℃.
• Adjust operating voltage to get optimum contrast at the center of the display.
  Measured value at the center point of LCD panel after more than 5 minutes while backlight turning on

Note 2 : reference Figure4

The luminance uniformity is calculated by using following formula. △Bp = Bp (Min.) / Bp (Max.)×100 (%) Bp (Max.) = Maximum brightness in 9 measured spots Bp (Min.) = Minimum brightness in 9 measured spots

Note 3: reference Figure5 The definition of viewing angle: Refer to the graph below marked by θ and Ф

Note 4: The definition of contrast ratio (Test LCM using PR-705):

Note 5 : reference Figure6
Definition of Response time. (Test LCD using DMS501):
The output signals of photo detector are measured when the input signals are changed from “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 6: reference Figure7
Definition of Color of CIE Coordinate and NTSC Ratio.

Function Specifications

Command Summary

For more information and details please refer to S1D13709 datasheet.

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 the viewable area. Unexpected display patterns may come out under an 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 modules should be stored in a 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 the 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.

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.

WIRING DIAGRAM

URL : www.topwaydisplay.com
Document Name: LMT035KDH03-NJN -Manual-Rev0.3

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
• 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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