DBC037LCDBVN40R035A Datasheet – 3.71-Inch 240×960 Bar TFT LCD

DBC037LCDBVN40R035A Datasheet provides the technical specifications for a
3.71-inch ultra-narrow bar TFT LCD module with
240 × 960 resolution, RGB + SPI interface and
ST7701S LCD driver IC. The module features a long
22.96 × 91.44 mm active display area, 350 cd/m² typical brightness,
1000:1 typical contrast ratio and an operating temperature range of
-20°C to +70°C.

DBC037LCDBVN40R035A 3.71-Inch Bar TFT LCD Overview

The DBC037LCDBVN40R035A is an a-Si TFT-LCD designed around an unusually narrow
portrait-format display area. Its 240 × 960 pixel matrix creates an approximately
1:4 aspect ratio, making this module fundamentally different from conventional 4:3, 16:9 or square TFT panels.

The display uses an RGB vertical stripe pixel arrangement, supports
16.7 million colors and operates in normally-black mode.
The specification identifies the viewing direction as ALL, which is supported by the wide
optical viewing-angle values published later in the datasheet.

240×960 Ultra-Narrow Display Format

The defining characteristic of the DBC037LCDBVN40R035A is its
240 × 960 ultra-tall display format. The active display area is only
22.96 mm wide but extends to 91.44 mm in height.

This geometry is useful for embedded interfaces where installation width is severely restricted but a longer
vertical information area is available. Typical design concepts may include status panels, equipment sidebars,
compact control interfaces and narrow information displays.

The complete LCM measures approximately
25.3 × 98.89 × 2.1 mm, making the module relatively thin despite its elongated
mechanical format.

RGB Video Interface with SPI Control

DBC037LCDBVN40R035A combines a parallel RGB video interface with a separate
SPI control interface.

The RGB section provides:

• DCLK: RGB dot clock
• DE: RGB data enable
• VS: RGB frame synchronization
• HS: RGB line synchronization
• DB0–DB17: RGB pixel data signals

The 18 RGB data lines correspond to a 6-bit-per-color RGB data path, while the ST7701S controller provides
the panel-driving and control functions required by the display.

The SPI section includes:

• SDA: SPI data
• SCL: SPI clock
• CS: SPI chip select
• RSTB: LCD module reset

This separation of high-speed pixel data and serial configuration signals should be considered when designing
the host processor or custom controller board.

40-Pin Interface Assignment

The module uses a 40-pin interface carrying the display power, backlight, SPI configuration,
RGB video data and additional reserved touch-related signals.

Important display-side pins include:

• VDD: 2.8V nominal LCD power
• VLED+ / VLED-: LED backlight supply
• RSTB: module reset
• SDA / SCL / CS: SPI interface
• DCLK / DE / VS / HS: RGB timing signals
• DB0–DB17: RGB image data

Pins 35 through 39 are identified as TP_INT, TP_SDA, TP_SCL, TP_RESET and TP_VCI.
However, the general specification explicitly identifies this module as
without TSP / without CTP. These signals should therefore not be interpreted as confirmation
that a touch panel is included with the standard module.

2.8V LCD Operating Voltage

The TFT-LCD circuitry operates from a relatively low-voltage supply.
The recommended operating voltage range is 2.6V to 3.3V, with
2.8V typical.

System designers should distinguish this 2.8V nominal LCD logic rail from the separate LED backlight
driving requirement.

12V LED Backlight and 25,000-Hour Lifetime

The backlight section uses four LEDs according to the general specification. The electrical section specifies
a 20 mA LED current and approximately
12V LED forward voltage.

• LED current: 20 mA
• LED voltage: 12 V
• LED quantity: 4 LEDs
• Specified LED lifetime: 25,000 hours

The datasheet defines LED lifetime at 25°C as the period until brightness decreases to approximately
50% of the initial value.

350 cd/m² Brightness and 1000:1 Contrast Ratio

The optical specification lists a
300 cd/m² minimum and 350 cd/m² typical luminance under the specified backlight
test condition.

The normally-black panel also provides a
1000:1 typical contrast ratio, with a minimum value of 800:1.

Key optical specifications include:

• Brightness: 300 cd/m² minimum, 350 cd/m² typical
• Contrast ratio: 800:1 minimum, 1000:1 typical
• Top viewing angle: 85° typical
• Bottom viewing angle: 85° typical
• Left viewing angle: 85° typical
• Right viewing angle: 85° typical
• Rise response time: 35 ms typical
• Fall response time: 35 ms typical
• Luminance uniformity: 70% minimum, 80% typical
• NTSC: 50%

The four-direction 85° viewing-angle specification is a particularly useful characteristic
for a long narrow display that may be mounted vertically or viewed from different positions.

RGB Interface Timing Considerations

The datasheet provides a timing diagram for the RGB interface and defines configurable limits for horizontal
and vertical synchronization parameters.

The timing section identifies parameters for:

• Horizontal sync width
• Horizontal back porch
• Horizontal front porch
• Vertical sync width
• Vertical back porch
• Vertical front porch

However, the specification does not provide a complete fixed pixel-clock and total-frame timing table for this
model. Engineers developing their own RGB controller should therefore use the original timing diagram and
confirm the required ST7701S initialization and RGB timing before freezing the hardware design.

-20°C to +70°C Operating Temperature

The absolute maximum ratings specify an operating temperature range of
-20°C to +70°C and a storage temperature range of
-30°C to +80°C.

The reliability test section separately documents:

• High-temperature operation: +70°C for 240 hours
• Low-temperature operation: -20°C for 240 hours
• High-temperature storage: +80°C for 240 hours
• Low-temperature storage: -30°C for 240 hours
• High-temperature/humidity storage: +60°C, 90% RH for 160 hours
• Thermal shock: -30°C to +80°C, 30 cycles
• Air ESD: ±8 kV
• Contact ESD: ±4 kV
• Vibration: 10–55 Hz, 2 hours per X/Y/Z direction
• Mechanical shock: 60G, 6 ms
• Package drop: 80 cm

The test methods reference IEC 60068 and IEC 61000 series standards in the original specification.
These published conditions provide additional engineering reference when evaluating the module for
industrial equipment subjected to temperature cycling, vibration and handling stress.

Download the DBC037LCDBVN40R035A Datasheet

Download the complete DBC037LCDBVN40R035A Datasheet for detailed information covering
the 240 × 960 display format, 40-pin interface assignment, RGB and SPI signals, ST7701S driver,
2.8V LCD power requirements, LED backlight conditions, optical characteristics, environmental tests
and mechanical drawings.

For controller-board development, verify the
240 × 960 native resolution, RGB + SPI interface, 18-bit RGB data path, ST7701S initialization,
2.8V logic supply and 25.3 × 98.89 mm module outline before finalizing the hardware design.