TXW395017S0-HY 3.95-inch TFT LCD+CTP Product Specification

Issuing Party: Shenzhen Tianxianwei Technology Co., Ltd.

1. Product Basic Description

1.1 Scope of Application

This specification applies to the TXW395017S0-HY LCD module supplied by Shenzhen Tianxianwei Technology Co., Ltd. The native resolution of this module is 480×RGB×480 dots. For the full parameters of the driver IC, please refer to the official specification and data book of the Sitronix ST7701SN chip. All raw materials and production processes of this module meet lead-free requirements.

1.2 Core LCM Features

• The complete stacked structure consists of TFT panel, driver IC, flexible FPC circuit board, backlight unit and capacitive touch panel, adopting an all-viewing IPS display design
• The panel is equipped with 480 segment electrode outputs and 480 common electrode outputs, which can realize 16.7M full-color display through software configuration
• Equipped with side-lit white LED backlight and 2-lane MIPI high-speed serial interface
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1.3 Recommended Application Scenarios

Suitable for industrial human-machine interaction terminals, smart home control panels, portable medical display devices, IoT intelligent terminals and other scenarios

2. General Parameters of LCM Module

• Basic display type: Normally Black Active Matrix TFT
• Total number of pixels: 480×3RGB (Horizontal) × 480 (Vertical) Dots
• Pixel arrangement: RGB Vertical Stripe
• Pixel pitch: 0.1497mm (Horizontal), 0.1462mm (Vertical)
• Active display area size: 71.86mm (Width) × 70.18mm (Height)
• Viewing direction: All Viewing, typical viewing angle parameter 80/80/80/80
• TFT driver IC model: ST7701SN
• TFT interface type: 2lane MIPI Interface
• Outline dimension of bare LCM: 74.66mm (Width) × 76.54mm (Height) × 2.06mm (Thickness)
• Overall stacking dimension with touch panel: 83.00mm (Width) × 83.00mm (Height) × 3.29mm (Thickness)
• Touch structure type: G+FF
• Touch driver IC model: GT911
• Touch communication interface: I2C
• Default unspecified dimensional tolerance: ±0.20mm
• Exclusive performance parameters of touch panel: Operating voltage range 2.8V-3.3V, overall light transmittance ≥82%, surface hardness 6H. It is recommended that the size of the touch window is enlarged by 0.3~0.5mm unilaterally compared with the LCM active display area to avoid edge optical black border
• Parameters of IR semi-transparent black area: Light transmittance at 550nm visible wavelength is 15%±5%, and transmittance at 940nm infrared wavelength is ＞80%
• Panel stacking structure details: The cover plate is made of 0.7mm thickness AGC glass, the touch sensor adopts 0.35mm thickness ITO conductive film, total thickness of touch layer is 1.05±0.1mm
• Backlight performance: Side-lit backlight integrated with 8 white LED chips, typical brightness with full stack is 350cd/m², minimum brightness uniformity is 80%
• Environmental protection compliance requirements: Fully RoHS compliant
• Operating temperature range: -20℃~+70℃, corresponding operating humidity 20%~90%RH
• Storage temperature range: -30℃~+80℃, corresponding storage humidity 20%~90%RH
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3. Absolute Maximum Ratings

Any operation exceeding the following limit values may cause irreversible hardware damage to the module:

• Maximum LCM normal operating temperature: +70℃, minimum: -20℃
• Maximum LCM limit storage temperature: +80℃, minimum: -30℃
• Maximum allowable operating temperature and humidity of touch panel: +70℃ / 90%RH, minimum: -20℃ / 20%RH
• Maximum allowable storage temperature and humidity of touch panel: +80℃ / 90%RH, minimum: -30℃ / 20%RH
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4. Electrical Characteristics

4.1 TFT DC Characteristics

• Supply voltage for I/O domain: Minimum 1.65V, typical 1.8V, maximum 3.3V
• Supply voltage for core DC/DC circuit: Minimum 2.6V, typical 3.3V, maximum 3.3V
• Normal operating current and sleep mode current parameters can be obtained by referring to the corresponding ST7701SN chip manual
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4.2 Backlight Unit Characteristics

This backlight system is side-lighting type, integrated with 8 white LED chips, the core parameters are as follows:

• Forward voltage: Minimum 11.2V, maximum 12.8V
• Rated forward operating current: Typical 40mA
• Typical brightness with full LCM+CTP stack: 350cd/m²
• Nominal service life of LED: 30000 hours. This life is defined as the time when the module brightness attenuates to 50% of the initial brightness under the condition that the driving current of each single LED is 20mA. If the driving current of a single LED exceeds 25mA for a long time, the service life of the backlight will be shortened accordingly.
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5. 30Pin FPC Pin Definition Description

Pin 1: LEDK, Backlight Cathode Power Supply Input Terminal
Pin 2: LEDA, Backlight Anode Power Supply Input Terminal
Pin 3: CTP-VCC, Touch Panel Power Supply Terminal, Rated Power Supply Range 2.8~3.3V
Pin 4: NC, No Connection
Pin 5: CTP-SCL, Touch Panel I2C Communication Clock Line, 3.3V Level Support
Pin 6: NC, No Connection
Pin 7: CTP-SDA, Touch Panel I2C Communication Data Line, 3.3V Level Support
Pin 8: NC, No Connection
Pin 9: CTP-RST, Touch Panel Reset Signal Terminal, 3.3V Level Support
Pin 10: NC, No Connection
Pin 11: CTP-INT, Touch Panel Interrupt Output Signal Terminal
Pin 12~13: NC, No Connection
Pin 14: GND, Power Ground Terminal
Pin 15: RESET, Display Driver Reset Signal Input Terminal, Low Level Active
Pin 16~17: TE, Tearing Effect Output Pulse Terminal, Used for Frame Refresh Synchronization
Pin 18: VDD, Display Core Power Supply Terminal, Typical 3.3V
Pin 19~20: VDDIO, I/O Domain Power Supply Terminal, Typical 1.8V
Pin 21: GND, Power Ground Terminal
Pin 22: NC, No Connection
Pin 23: GND, Power Ground Terminal
Pin 24: NC, No Connection
Pin 25: GND, Power Ground Terminal
Pin 26: CLKP, Positive Polarity of Low Voltage Differential Clock Signal
Pin 27: CLKN, Negative Polarity of Low Voltage Differential Clock Signal
Pin 28: GND, Power Ground Terminal
Pin 29: MIPI_1N, Negative Polarity of Low Voltage Differential Data 1 Signal
Pin 30: MIPI_1P, Positive Polarity of Low Voltage Differential Data 1 Signal
The remaining MIPI_0N, MIPI_0P and matching ground pins are the differential data transmission terminals corresponding to the 2-lane MIPI communication. The timing characteristics refer to the power-on sequence, MIPI high speed/low power mode, and Burst mode description documents on page 7 to 11 of the manual.

6. Reliability Test Standards and Requirements

All mass production and delivery modules pass the following 96-hour continuous strict reliability verification. After all tests, the functions must be completely normal, and no missing segments, short circuits, blurred display, no display, abnormal display, liquid crystal leakage are allowed. At the same time, no adverse phenomena such as low-temperature bubbles, loose and falling edge sealing, panel rainbow patterns shall appear:

1. High temperature storage test: Continuous placement for 96 hours in +80℃ environment
2. Low temperature storage test: Continuous placement for 96 hours in -30℃ environment
3. High temperature continuous operation test: Continuous power-on operation for 96 hours in +70℃ environment
4. Low temperature continuous operation test: Continuous power-on operation for 96 hours in -20℃ environment
5. High temperature and high humidity storage test: Continuous placement for 96 hours in 50℃, 90%RH environment
6. Thermal and cold shock cycle test: In static state, hold at -20℃ for 30 minutes and hold at 60℃ for 30 minutes as one cycle, complete 50 cycles of test in total.
   The unspecified packaging method of this product is currently TBD (To Be Determined).