RG-T040BCSA-01 — 4.0″ 720x720 IPS Round TFT LCD Module

Panel, resolution and form factor

The panel uses IPS Round; a circular active area, meaning the usable display region is a circle rather than a rectangle — firmware layouts, icon fonts and any pixel-perfect UI must be designed around the corner areas, which sit outside the visible circle; the native resolution is 720x720.

Active area 101.52x106.55 mm sits inside an outline of 105.61x109.87x2.09 mm — the difference is the bezel, driver area and connector allowance your mechanical drawing must reserve.

Backlight brightness and viewing conditions

Typical luminance is 400 cd/m². That suits indoor products with normal ambient light and semi-outdoor enclosures that avoid direct sun. It is a common specification for meter and instrument panels, and for indoor kiosks with controlled brightness. Direct sunlight would still wash the image out, so outdoor-facing products should consider a high-brightness or sunlight-readable option.

The panel is IPS, which keeps colours and viewing angles stable when viewed off-axis — useful where the screen is not directly facing the user, such as angled panels, handheld instruments or equipment mounted at a slight tilt.

MCU interface and display driver IC

The module is driven over 4 LANE MIPI 40PIN. This is the electrical interface between your MCU and the panel, and it determines two things: how many pins and how much board area your PCB needs, and how fast the screen can be refreshed.

MIPI DSI is a high-speed serial interface commonly supported by application processors; it carries pixel data plus control signals over a small number of lanes.

Display driver IC: SC7707. Knowing the driver lets your firmware team pull the correct initialisation sequence and timing parameters — this is the usual starting point when bringing up a new panel.

Touch capability

This configuration is without touch — display only. That suits products where input comes from buttons, a rotary encoder, a keypad or a remote control, and it keeps the module thinner, lower-cost and free of touch-panel calibration work. If your product needs on-screen interaction, ask for the capacitive-touch variant of this size.

Environmental range and storage

Operating temperature is -20 °C to 70 °C — the panel must be within this range during operation. Specify enclosure ventilation and consider thermal rise from electronics inside the housing, because internal temperature can exceed ambient.

Storage range is -30 °C to 80 °C, which matters for shipping, warehousing and unpowered periods — particularly relevant for products shipped through hot climates or stored in containers.

Integration and ordering notes

Every model in this series is held in permanent stock with MOQ 0, so samples and production quantities ship from the same bin and the specification does not change between them. Stock items typically ship within 24–48 hours.

If your project needs something the standard configuration does not cover — a different interface, touch type, brightness range, backlight life or outline dimension — it is worth asking for a custom quotation. Adjusting an interface or outline within an existing family is usually far cheaper and faster than starting a new module from scratch, and the factory-direct route means you deal with the manufacturer rather than a trading company.