What is the cost of a 3.4 inch 480x480 TFT module?

If you’re scouting for a compact display for your next embedded project, the 3.4 inch 480x480 TFT module typically lands in the $15 to $35 range for single-unit purchases, depending on the interface, backlight brightness, and whether it includes a touch panel or driver board. For example, a standard SPI or RGB interface variant without capacitive touch from a reputable supplier like 3.4 inch 480x480 transmissive tft display can be found around $22 to $28 per piece. But don’t lock that number in your head—pricing shifts dramatically with volume, customizations, and the specific silicon inside. Let’s break down the real cost drivers with hard data.

Display specs that hit your wallet
The 3.4-inch diagonal with a 480x480 resolution gives you a 1:1 aspect ratio, which is rare in the TFT world—most small panels are 4:3 or 16:9. This square format is a favorite for smart home controllers, wearables, and industrial HMI panels because it fits nicely into circular or square bezels. The pixel density sits at roughly 200 PPI (480 / (3.4 * 0.707) for the diagonal), which is sharp enough for icons and 12-point text. The module itself is usually built on an a-Si TFT backplane with a TN or IPS LCD cell. IPS panels cost about 15-20% more than TN due to better viewing angles (up to 80 degrees in all directions) and higher contrast ratios (typically 800:1 vs 500:1 for TN). You’ll see the price gap widen if you need an optical bonding layer for anti-glare or reduced parallax, which adds another $3-$5 to the BOM.

Interface matters more than you think
The interface is the biggest cost variable after the display itself. A 4-line SPI interface (with CS, DC, SCLK, MOSI) is the cheapest to implement because it uses only 4 GPIO pins on your MCU, but it’s slow—max refresh around 30-40 fps at 480x480 with 16-bit color. That’s fine for static menus but not for video. An 8-bit parallel RGB interface (RGB565) can push 60 fps easily, but it requires 18-24 pins on the host side, which drives up the module cost by $4-$8 because of the extra flex cable traces and driver IC complexity. Some modules also offer MIPI DSI (2-lane or 4-lane), which is common in smartphone displays but rare in this size—expect a $10-$15 premium for that. The driver IC itself, like the ILI9488 or ST7789, is a commodity part costing around $1.50 to $3 in volume, but the IC’s RAM buffer (for frame storage) adds to the die size. A 480x480x16-bit frame buffer requires about 460 KB of SRAM, which is why these drivers often have built-in 512 KB or 1 MB of dedicated memory.

Backlight and optical stack
The backlight is a major cost center. A typical 3.4-inch module uses 6 to 8 white LEDs in a side-edge configuration, with a total forward current of 60-120 mA at 3.0-3.3V. The brightness specification—usually 300 to 600 nits—directly correlates with LED binning and the number of LEDs. A 300-nit backlight adds about $2 to the BOM, while a 600-nit high-brightness version (often using GaN-on-SiC LEDs) can cost $4-$5 more. If you need a transmissive panel (which is the standard for most TFT modules), the backlight is always on, so power efficiency matters. Some modules come with a PWM dimming circuit built into the flex, which adds a small cost (<$0.50) but saves you from designing an external driver. The polarizer stack—a linear polarizer on the bottom and a quarter-wave retarder on top for circular polarization—is another $0.30-$0.50 in materials, but it’s critical for outdoor readability.

Touch panel integration
Adding a touch screen is where the price jumps. A resistive touch panel (4-wire or 5-wire) is the cheapest option, adding $2-$4 to the module cost. It works with a stylus or gloved finger, but it’s not multi-touch and has a 75-85% light transmission, which reduces display brightness slightly. A capacitive touch panel (projected capacitive, or PCAP) with a glass cover lens and an ITO sensor layer costs $6-$12 more, depending on whether it supports 5-point or 10-point multi-touch. The touch controller IC, like the FT6336 or CST816S, adds another $1-$2 in BOM. If you need an optical bonding between the touch panel and the display (to reduce reflections and improve contrast), that’s an additional $3-$5 in manufacturing labor and materials. For a fully bonded module with a 10-point capacitive touch and 600-nit backlight, the single-unit price can easily hit $35-$45.

Volume pricing and MOQ
Single-unit pricing is always the worst. At 100-piece quantities, the per-unit cost typically drops by 25-35%. At 1,000 pieces, you’re looking at a 40-50% discount off the single-unit price. For example, a module that sells for $25 each at qty 1 might be $15 at qty 100 and $12.50 at qty 1,000. The minimum order quantity (MOQ) varies by supplier—some will sell you a single unit for prototyping, but custom designs (like a specific FPC connector or different cable length) often require a MOQ of 500-1,000 pieces. The lead time for standard modules is usually 4-6 weeks from Asian factories, but custom variants can stretch to 8-12 weeks because of the tooling for the flex circuit and the backlight assembly.

Hidden costs: connectors, cables, and driver boards
Don’t forget the ancillary components. The module itself comes with a 0.5mm pitch FPC connector (usually 24-pin or 30-pin), but you need a matching socket on your PCB—that’s about $0.10-$0.30 in volume. If you’re using a breakout board or a pre-assembled driver board (like one with an ESP32-S3 or STM32F4), that adds $8-$15 to the total cost. Some modules come with an integrated TCON (timing controller) that handles the RGB interface timing, while others require an external TCON—the latter is cheaper for the module but pushes cost to your PCB. For a 3.4-inch 480x480 module, the TCON is usually built into the driver IC, so you don’t need an external one unless you’re using a parallel interface without a dedicated controller.

Real-world price examples from suppliers
Let’s look at actual data points. A 3.4-inch 480x480 IPS module with SPI interface from a Chinese manufacturer (like Shenzhen Newhaven or Winstar) is often listed at $18-$22 for a single unit on Alibaba or direct sales. A similar module with RGB interface and capacitive touch from a US distributor (like Digi-Key or Mouser) can be $28-$35 due to logistics and warranty. For a high-brightness (600 nit) variant with optical bonding, expect $40-$50 from a specialty supplier like DisplayModule or 4D Systems. The table below summarizes typical pricing tiers:

Why the 480x480 resolution is a sweet spot
This resolution is not arbitrary. At 480x480, the display can run at 60 fps with a 16-bit color depth using a 24 MHz SPI clock or a 10 MHz RGB clock. The pixel clock for a 480x480 RGB interface at 60 fps is roughly 480 * 480 * 60 * 1.2 (blanking overhead) = 16.6 MHz, which is well within the capability of most MCUs like the ESP32 or STM32H7. The square format also means you can rotate the display 90 degrees without losing aspect ratio, which is useful for portrait or landscape layouts. The active area is about 69.1mm x 69.1mm (with a 3.4-inch diagonal), giving you a 4775 mm² viewing area—that’s 23% more than a 3.5-inch 480x320 panel (which has 3870 mm²). So you’re getting more screen real estate per dollar compared to a standard rectangular panel.

Supply chain and lead times
The display module market is heavily influenced by the LCD glass cycle. Most 3.4-inch panels use Gen 4 or Gen 5 glass (about 730x920 mm or 1100x1300 mm), which yields about 80 to 150 panels per sheet depending on the design. The driver ICs are typically fabricated on 200mm or 300mm wafers at 90nm or 110nm nodes, and the current lead time for these ICs (as of mid-2024) is 8-12 weeks due to ongoing semiconductor shortages. The backlight LEDs are also in tight supply—GaN-based LEDs for high brightness are allocated to automotive and industrial customers first. If you’re ordering a custom module with a non-standard FPC length (e.g., 50mm instead of the standard 30mm), the tooling cost for the flex circuit is about $200-$500 one-time, and the per-unit cost increases by $0.50-$1.00.

Testing and quality assurance
The cost of a module also includes the testing overhead. Reputable manufacturers run 100% visual inspection for dead pixels (typically Class II or Class III per ISO 13406-2, allowing up to 5 dead pixels per million), backlight uniformity testing (within 20% variation across the panel), and interface signal integrity checks at 25°C and 60°C. Some suppliers offer environmental testing (like 85°C/85% RH for 500 hours) for an extra $2-$5 per unit in small batches. For a module that costs $25, the testing and packaging (including anti-static bags and foam inserts) accounts for about $1.50 to $2.00 of the price.

Where to save money
If you’re on a tight budget, consider buying a bare module without a touch panel and adding your own resistive touch overlay (which you can source for $1-$2 from a generic supplier). Also, opt for a TN panel instead of IPS if your viewing angles are limited to 30 degrees off-axis. And if you don’t need high brightness, a 250-nit backlight can knock off $3-$5 from the module cost. Finally, avoid custom FPC lengths—stick with the standard 30mm or 40mm cable to avoid tooling charges.