480*480 Square Lcd Screen 50Pin 3.95 IPS TFT Display With ST7701s
1. Specification of 4 inch touch screen module
| MODEL NO. | CH400WV17B-CTBA |
| Module type | TFT+CTP |
| Module size | 86.0(W)×86.0(H)×3.55(T) mm |
| TFT/CTP Active area | 71.856(W)×70.176(H) mm |
| LENS Viewing area | 68(W)×68(H) mm |
| Driver IC | ST7701S |
| Back Light | 8pcs White LED |
| Interface | 3line SPI + 24bit RGB |
2. Description of 3.95 inch touch screen module
chenghao is an LCD display supplier, providing OEM/ODM services for global display users. CH400WV17B-CTBA is an All Black Effect Touch Screen Display customized by chenghao for customers. It is a color active matrix thin film transistor (TFT) liquid crystal display (LCD) that uses amorphous silicon TFT as a switching device. It mainly includes a All Black Effect glass cover, a tft lcd panel, a driver IC, a backlight and FPC, etc.
(1) The glass cover is All Black Effect. Even when the screen is off, the display surface still looks pure black, and the components of the touch screen module cannot be seen through the glass cover.
(2) The Tft Lcd Panel has a 3.95” ( square screen ) diagonally measured active display area with 480(RGB)x480 dot resolution.
(3) The ST7701S mounted on the glass is used as the driver IC of the Touch Screen Module, and is interconnected with other components through the FPC. By inputting RGB signals to the driver IC, this Touch Screen Module can display 16M colors.
(4) The Back Light has 16 parallel white LEDs. By inputting IF=40mA and VF=25.6V to BL, the display screen can generate a Luminance of 300 cd/m2.
(5) FPC can also be customized according to customer requirements, such as modifying back-light and FPC structure, interface definition, etc.
RoHS Compliance & Halogen Free.
3. Drawings of 4 inch tft touch screen module
Notes:
(1) Display Type : 3.95inch TFT+CTP
(2) Viewing Direction : 80/80/80/80
(3) Display Mode : IPS / Transmissive / Normally Black
(4) Operating Temp : -20~70 ℃
(5) Storage Temp : -30~80 ℃
(6) Unmarker Tolerance: ±0.20
(7) Protection : ROHS
4. Caution for operation
It is an indispensable condition to drive LCD’s within the specified voltage limit since the
higher voltage then the limit cause the shorter LCD life.
An electrochemical reaction due to direct current causes LCD’s undesirable deterioration, so
that the use of direct current drive should be avoided.
Response time will be extremely delayed at lower temperature then the operating
temperature range and on the other hand at higher temperature LCD’s how dark color in
them. However those phenomena do not mean malfunction or out of order with LCD’s,
which will come back in the specified operation temperature.
If the display area is pushed hard during operation, some font will be abnormally displayed
but it resumes normal condition after turning off once.
A slight dew depositing on terminals is a cause for electro-chemical reaction resulting in
terminal open circuit.
Usage under the maximum operating temperature, 50%Rh or less is required.
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