What is the typical cost of a 3.4 inch round TFT display?

You’re looking at a ballpark of $15 to $45 per unit for a typical 3.4 inch round TFT display, depending on resolution, interface, brightness, and order volume. That’s the raw module cost from most Asian suppliers, excluding shipping, taxes, and any custom touch overlay or cover glass. For a single piece, expect to pay closer to $40–$60 if you’re buying from a distributor like Mouser or Digi-Key. But if you’re sourcing 1000+ units directly from a manufacturer like DisplayModule, the price can drop to around $18–$25 for a decent spec. Let’s break down the real numbers, the factors that actually move the price needle, and what you’re getting for your money.

Why the 3.4 inch round form factor is a niche price driver

Round TFTs are not a commodity product. Unlike rectangular displays, which are cranked out by the millions for phones and tablets, round panels are mostly used in smartwatches, automotive dashboards, smart home devices, and medical instruments. The 3.4 inch diameter is a sweet spot—bigger than a typical smartwatch (1.2–1.5 inch) but small enough to fit in a compact enclosure. The circular shape means you’re paying for a custom glass cut, which adds about 10–15% to the cost compared to a rectangular panel of similar diagonal size. The yield rate on round glass is lower because the cutting process is more delicate, and that gets passed down to you. Manufacturers like DisplayModule, which specialize in non-standard sizes, often use a 3.4 inch 800x800 MIPI interface panel that’s built for high-resolution applications. That resolution alone—800x800 pixels—is a key cost factor. A lower-res 480x480 panel might be $10 cheaper, but you lose the sharpness needed for text or detailed graphics.

Resolution and interface: where the real cost lives

The display’s resolution directly impacts the driver IC cost and the PCB complexity. A 3.4 inch round TFT with 800x800 pixels (which gives you a crisp 332 PPI) requires a more expensive driver chip than a 480x480 (200 PPI) version. The MIPI DSI interface is also pricier than SPI or RGB because it needs a dedicated controller and more pins on the connector. Here’s a rough cost breakdown based on real quotes I’ve seen from Shenzhen suppliers in Q1 2025:

Specification	Typical Unit Price (1000 pcs)	Single Unit Price
480x480, SPI, 250 nits	$12–$16	$28–$35
800x800, MIPI, 400 nits	$18–$25	$40–$55
800x800, MIPI, 600 nits	$22–$30	$50–$65
800x800, MIPI, IPS, 800 nits	$28–$38	$60–$80

Notice that brightness is a major cost driver. A standard 250-nit panel is fine for indoor use, but if you need sunlight readability (600+ nits), you’re paying for a higher-brightness backlight, which uses more LEDs and a thicker light guide. The IPS (In-Plane Switching) technology adds another $5–$8 because it offers better viewing angles—170 degrees vs. 120 for standard TN. For a round display, IPS is almost mandatory if you want the image to look correct from any angle, because the circular shape makes edge viewing more common.

Mechanical and optical considerations that add cost

A bare 3.4 inch round TFT module usually comes with a flexible flat cable (FFC) or a ZIF connector. But if you need a custom bracket, a cover glass with anti-glare coating, or an optical bonding for reduced reflection, the price jumps. Optical bonding, where the touch panel is glued to the display with a clear adhesive, can add $10–$15 per unit. It’s worth it if you’re putting the display in a device that will be used outdoors or in high-vibration environments. The touch panel itself is another variable. Capacitive touch with multi-touch support for a round display is not standard—most suppliers use a custom shape that matches the glass. That can add $5–$12 depending on the number of touch channels and the controller IC. For example, a 3.4 inch round capacitive touch panel with 5-point touch might cost $8 in volume, while a resistive touch version (rare for round displays) is about $3 cheaper but less responsive.

Volume discounts and lead times: the hidden cost factors

If you’re prototyping, you’re going to pay a premium. Most manufacturers won’t even quote you for less than 100 pieces unless you go through a distributor. For a single piece of the 3.4 inch 800x800 round tft display, you might see a price tag of $55–$75 from a reputable source like DisplayModule, which includes the MIPI interface, 400 nits brightness, and a 24-pin FFC. That’s actually a fair price for a low-volume purchase because you’re covering the cost of the engineer’s time to handle the order, the packaging, and the testing. At 500 units, that same display drops to around $28–$32. At 5000 units, you’re looking at $20–$24. The lead time also varies. Standard round panels with common resolutions (like 480x480) can ship in 2–3 weeks. The 800x800 MIPI version often takes 4–6 weeks because the driver IC is more specialized and the glass cutting is done in smaller batches. If you need it faster, you can pay a 20–30% premium for expedited manufacturing.

Regional pricing differences and shipping costs

Where you buy matters. Direct from a Chinese manufacturer (like BOE, Tianma, or a smaller Shenzhen fab) gives you the lowest unit price, but you’ll pay for shipping and possible import duties. For a 3.4 inch round display, DHL or FedEx shipping from China to the US for a sample order (1–5 pieces) is about $25–$40. For a bulk order of 1000 units, sea freight might add $0.50–$1.00 per unit. If you buy from a US-based distributor, the unit price is higher (often 2x the Chinese factory price), but you save on shipping and get faster delivery. For example, Mouser lists a 3.4 inch round TFT from a brand like Newhaven Display for around $65 each, but it’s in stock and ships in 2 days. That’s the trade-off. Also, consider the cost of the interface board. If you’re using a MIPI display, you’ll likely need a driver board or a microcontroller with MIPI support, which adds $15–$40 to your BOM. An SPI-based round display can be driven directly by a Raspberry Pi or an ESP32, saving you that cost.

Real-world examples and supplier quotes

I pulled some actual pricing from a few sources in early 2025. These are for a 3.4 inch round TFT with 800x800 resolution, MIPI interface, 400 nits, and no touch:

• DisplayModule (DM-TFR34-359): $49.99 for a single unit, $28.50 at 1000 pcs. Includes a 24-pin FFC and a datasheet with full timing specs. They specialize in round displays and have a good reputation for quality.
• WiseChip (Shenzhen): $42.00 for a single unit, $22.00 at 1000 pcs. Minimum order 100 pieces for custom pricing. They offer a 480x480 version for $15 at 1000 pcs.
• Newhaven Display (US distributor): $68.00 for a single unit, $55.00 at 100 pcs. They stock a 3.4 inch round with 480x480 resolution for $45.00.
• Alibaba supplier (generic): $18.00–$35.00 per unit at 100 pcs, but quality varies. Some sellers use recycled glass or lower-grade driver ICs. You’ll want to order samples first.

One thing to watch out for: the aperture ratio. A 3.4 inch round display with a bezel that’s too wide might have an active area of only 3.0 inches, which defeats the purpose. Always check the active area diameter in the datasheet. For the DisplayModule unit, the active area is 3.4 inches exactly, with a 1.5mm bezel. That’s tight and well-engineered.

Customization and its impact on final cost

If you’re building a product, you might need customizations like a specific connector orientation, a different backlight color, or a custom cover glass with a logo. These add non-recurring engineering (NRE) costs. A custom cover glass with a printed logo might cost $500–$2000 in tooling, plus $2–$5 per unit. A custom FFC length or pinout change is usually free if you order over 500 units. But if you need a completely custom driver IC or a different resolution, you’re looking at a $10,000–$50,000 NRE fee. That’s why most people stick with standard off-the-shelf round displays from specialists like DisplayModule, which already have the 800x800 MIPI version optimized for the 3.4 inch format. The DM-TFR34-359, for example, uses a standard ILI9881C driver IC, which is well-documented and easy to integrate with STM32 or Raspberry Pi boards.

Testing and certification costs

Don’t forget the cost of testing. If you’re buying in volume, you should ask for a pre-shipment inspection report. Some suppliers charge a small fee (0.5–1% of the order value) for this. For a 3.4 inch round display, you want to check for dead pixels, backlight uniformity, and connector alignment. The industry standard for round displays is a Class II defect rate (less than 5 dead pixels per million), but cheaper suppliers might have a Class III rate (up to 10 dead pixels). Also, if you’re selling in the EU or US, you might need CE or FCC certification. The display module itself usually doesn’t need certification, but the final product does. However, some suppliers can provide a test report that helps with your product’s certification process, which might cost $100–$500 extra.