3.9 inch High Brightness, Wide Temperature, Bar LCD TFT - RFS390B-AQH-DNN
3.9 inch High Brightness, Wide Temperature, Bar LCD TFT - RFS390B-AQH-DNN

3.9" High Brightness, Wide Temperature, Bar TFT LCD

Model No. RFS390B-AQH-DNN

RFS390B-AQH-DNN is a TN transmissive type color active matrix bar TFT LCD display module. This bar LCD display has a 3.9 inch diagonally measured active display area with 480x128 dots resolution. RFS390B-AQH-DNN bar TFT display module uses HX8278-A driver IC supporting 24-bit RGB interface. It features high brightness, providing brightness 1000 cd/m2 with contrast ratio (typical value) 500: 1.

The supply voltage of RFS390B-AQH-DNN module ranges from 3.0V-3.6V, the typical value is 3.3V. The module works within wide temperature range from -30 to +80℃,Storage Temperature covers from -40 to +90℃.

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  • General Specs
  • Interface Pin Function
  • Contour Drawing
  • Absolute Maximum Ratings
  • Electrical Characteristics
Item Dimension Unit
TFT Series Bar Type TFT LCD / High Brightness TFT / Wide Temperature TFT
Size (Diagonal) 3.9 inch
Dot Matrix / Resolution 480 × 128 × RGB (TFT) dots
Module Dimension 105.5(W) × 37.0(H) × 3.05(D) mm
Active Area 95.04 × 25.34 mm
Dot / Pixel Pitch 0.066(W) × 0.198(H) mm
LCD Type TFT, Normally White, Transmissive
View Direction 6 o’clock
Gray Scale Inversion Direction 12 o’clock
Aspect Ratio Bar Type
Backlight Type LED, Normally White
Control Board No
TFT Driver IC HX8278-A or Equal
Interface RGB-24BIT (SYNC mode)
Touch Panel Without Touch Screen
Surface Anti-Glare
Brightness 1000 cd/㎡
Mounting Hole No
Operating Temperature -30~+80 °C
Storage Temperature -40~+90 °C

LCM PIN Definition

No. Symbol Description
1 VLED- Backlight LED Cathode
2 VLED+ Backlight LED Anode.
3 GND System Ground
4 VCC Power supply for logic operation
5~12 R0~R7 Data bus
13~20 G0~G7 Data bus
21~28 B0~B7 Data bus
29 GND System Ground
30 DCLK Pixel clock signal
31 DISP Display on/off control
32 HSYNC Horizontal Sync signal
33 VSYNC Vertical Sync signal
34 NC No connection (Option DE)
35 NC No connection
36 GND System Ground
37 NC No connection (Option XR for RTP)
38 NC No connection (Option YD for RTP)
39 NC No connection (Option XL for RTP)
40 NC No connection (Option YU for RTP)

3.9 inch High Brightness, Wide Temperature, Bar LCD TFT - RFS390B-AQH-DNN

Item Symbol Min Typ Max Unit
Operating Temperature TOP -30 +80
Storage Temperature TST -40 +90

Operating conditions

Item Symbol Condition Min Typ Max Unit
Supply Voltage For LCM VCC 3.0 3.3 3.6 V
Supply Current For LCM ICC 15 25 mA

LED driving conditions

Item Symbol Min Typ Max Unit
Forward Current ILED 40 mA
Forward Voltage VLED+ 19.6 21 23.8 V
Backlight life time 50000 hr