Bài viết 2026 · Seoul, South Korea

Thiết kế và thi công bức tường trưng bày COB Pro P1.25 lõm 42m² tại Seoul

A Korean enterprise client needed a corporate showroom centerpiece in Seoul: a 42-square-meter concave Đèn tường COB LED wrapping across the room's focal wall. The catch — COB Pro cabinets are straight-edged aluminum die-castings, not flexible panels. To turn 208 flat cabinets into one smooth, deep concave arc, we engineered a custom curved floor-standing frame plus wedge-shaped arc connecting plates that set the exact pivot angle at every joint. The result: 15.6 meters of continuous, facet-free curve, driven by a single NovaStar H9 video wall splicer loaded with three H_20xRJ45 sending cards across 42 active Ethernet ports for 27 million pixels.

Phạm vi dự án

42.12 m²

Arc 15.6m × 2.7m high

Pixel Pitch

P1.25

COB Pro · Flip-Chip

Tủ

208

26 × 8 · 600×337.5mm

Tổng số điểm ảnh

27M

Độ phân giải xấp xỉ 3.25× 4K

Gửi bởi Nhóm Kỹ thuật DOIT VISION · · Xét bởi Kris LiangĐồng sáng lập · Tháng 8 năm 2026

CE · EMC · RoHS

15 kỹ sư · Đội ngũ 60 người tại Thâm Quyến

Hơn 55 quốc gia · NovaStar · Colorlight

PCB định hình + Linh hoạtMooncell + ResolumeLắp ráp Poka-Yoke

Tổng Quan Dự Án

Trong nháy mắt

Khách hàng

Client Doanh nghiệp

Seoul, Hàn Quốc

Địa điểm

Seoul, Hàn Quốc

Cài đặt tại chỗ

hiển thị Công nghệ

P1.25 COB Pro

Flip-chip · 10,000:1 contrast

Form Factor

Concave Arc

Deep curve · smooth transition

Structure

Custom Curved Frame

Floor-standing · arc baseline

Bù góc

Arc Connecting Plates

Straight cabinets → smooth curve

Bộ xử lý video

NovaStar H9

3× H_20xRJ45 · 60 ports

Thử thách chính

Seamless Concave Curve

208 straight-edge cabinets

01 — Tóm tắt

A Concave Centerpiece, Not a Flat Wall

The client didn't want another flat rectangle. They wanted the wall to curve inward around the room — an immersive concave canvas that pulls visitors into the content.

An enterprise client in Seoul reached out with a specific requirement for their corporate showroom: a 42.12-square-meter concave COB LED wall — 15.6 meters of arc length wrapping across the room's focal wall, rising 2.7 meters high. Content would be brand films, product visualizations, and data dashboards, all viewed by VIP visitors standing Cách xa 1.5 đến 2 mét.

At that viewing distance, pixel pitch matters. P1.5 or P1.8 would show visible pixel structure. We specified COB Pro P1.25 — flip-chip COB with 10,000:1 contrast and a sealed 5H surface — so the image stays crisp and the screen survives cleaning and accidental touch in a high-traffic showroom.

The real problem, though, wasn't the pitch. It was the đường cong.

Empty Seoul showroom with the custom curved floor-standing frame erected before cabinet installation

02 — The Geometry Problem

Straight Cabinets Don't Bend

A flexible LED panel bends natively — but it gives up the image quality. COB Pro delivers the image; the hard part is making its rigid aluminum cabinets follow a curve.

The COB Pro cabinet is a 600×337.5mm aluminum die-casting with perfectly straight edges — engineered for flat walls and front-service access, not for bending. Chained along a concave arc, 26 straight cabinets behave like a 26-segment polygon: every flat face must pivot outward at each joint to follow the curve.

Bolt those cabinets together with standard flat brackets and you get visible facets — angular breaks at every joint where the eye catches a corner instead of a curve. The deeper the arc, the worse it gets. The client's arc was deep, and "seamless, smooth transition" was a hard requirement written into the brief.

Facet LinesAt 26 joints, even a fraction of a degree of misalignment becomes a visible seam line down the wall.
Pixel Gap DriftAs cabinets angle away from each other, the pixel-to-pixel spacing across the joint grows — breaking image continuity at every seam.
Flatness vs. CurvatureA concave wall has no single flat reference plane, so standard laser-leveling and flat brackets can't establish the geometry.

Side view of the concave LED wall showing straight-edge cabinets assembled into an arc before modules were installed

03 — Structural Solution

A Curved Frame & Wedge Connecting Plates

The solution had two parts: one to define the arc, và một để set the angle at every joint.

First, we designed a custom curved floor-standing frame. CNC-machined to the exact concave radius, it forms the single continuous reference line the cabinets mount onto. Because it stands on the floor rather than hanging from the wall, it absorbs the full 832 kg weight of 208 cabinets and gives installers a rigid, repeatable baseline to work from.

Second, we manufactured wedge-shaped arc connecting plates that sit between every pair of adjacent cabinets. Each plate is machined to the precise pivot angle for its position on the arc — so when two straight cabinets meet, the plate closes the gap and locks both faces onto the curve. The result is a continuous surface where the joints disappear into the arc instead of announcing themselves as flat segments.

Why Not Just Use Flexible Panels?

Flexible SMD panels bend natively but trade away exactly what a corporate showroom needs up close: COB Pro's 10,000:1 contrast, flip-chip color uniformity, and sealed 5H surface. The frame-and-plate approach keeps every image-quality advantage of COB Pro while adding the curve — no compromise on either axis. Front-service access is also preserved, so any future module swap happens from the viewing side in minutes.

Front view of the concave LED wall unlit with modules partially installed during Seoul construction

Arc connecting plates between each cabinet pair lock the pivot angle so 26 straight faces read as one continuous concave curve.

CAD diagram showing how 26 straight-edge cabinets form a smooth concave arc through wedge connecting plates at each joint

04 — Kiến trúc hệ thống

Driving 27 Million Pixels

The curve was the visible challenge. The quieter one was behind the wall: 42 square meters of P1.25 COB doesn't run on a standard LED sender.

At P1.25, a single square meter holds 640,000 pixels. Across 42.12 m² that's 26,956,800 pixels — a 12,480 × 2,160 canvas, roughly 3.25 times the resolution of 4K. That pixel count dictates the entire processing topology.

/* PIXEL-TO-PROCESSOR CALCULATION */

[1] Total pixels: 26,956,800

[2] Per-port capacity: ≈ 650,000 (1G Ethernet)

[3] Số cổng cần thiết: 26,956,800 ÷ 650,000 ≈ 42

[4] H_20xRJ45 card: 13M pixels / 20 ports per card

[5] 2 cards: 26M pixels → insufficient

[6] 3 cards: 39M pixels · 60 ports (42 + 18 spare)

Two H_20xRJ45 sending cards top out at 26 million pixels — mathematically just short of the wall's 26.96M. So we loaded a single Máy ghép nối tường video NovaStar H9 với three H_20xRJ45 LED 4K sending cards. Because all three cards live inside one chassis with a shared frame lock, content sweeping across the 15.6-meter arc stays perfectly synchronized with zero tearing at the card boundaries — no external sync card required.

Why the Headroom Matters

Three cards running at 27M pixels sit at roughly 69% of their 39M combined capacity — comfortable margin, not a redline. That headroom absorbs peak content loads and leaves room to extend the wall later. The 18 spare Ethernet ports also mean a single failed port never takes a section of the arc offline mid-presentation.

Receiving cards are distributed across the 208 cabinets, with each active Ethernet port feeding a conservative count of cards — well within the recommended load, so no port risks frame drops even at peak content.

By Numbers

Thông số dự án

42.12

Mét vuông

15.6m arc length × 2.7m height · Concave curve

208

Tủ

26 columns × 8 rows · 600×337.5mm die-casting

27M

Tổng số điểm ảnh

12,480 × 2,160 · ≈ 3.25× 4K resolution

NovaStar H9 Splicer

3× H_20xRJ45 cards · 60 ports (42 active + 18 spare)

P1.25

Pixel Pitch

COB Pro · Flip-chip · 10,000:1 contrast

832

Total Cabinet Weight (kg)

208 × 4kg · Carried by floor-standing frame

Chúng tôi đã giao hàng như thế nào

From Shenzhen to Seoul in Four Weeks

Giai đoạn 01

Arc Geometry & Design

Room dimensions and viewing distance captured. Concave radius and per-joint pivot angle calculated. Curved floor frame and wedge connecting plates designed.

Giai đoạn 02

Frame & Plates Machining

Custom curved frame and arc connecting plates CNC-machined in Shenzhen, while 208 COB Pro P1.25 cabinets run through standard production in parallel.

Giai đoạn 03

Pre-assembly & Aging

Full wall pre-assembled on the arc frame in-factory and run through 72-hour aging. Joints inspected for facet-free transitions before disassembly and packing.

Giai đoạn 04

Install & Commissioning

Frame installed in Seoul, cabinets mounted, NovaStar H9 with 3× H_20xRJ45 cards configured. Color calibration across the 15.6m arc with remote commissioning support.

Planning a curved LED wall?

Get a free arc geometry + processor topology design from our engineering team within 48 hours. Includes concave radius calculation, frame and connecting plate spec, and the exact processor count for your pixel load — specific to your room dimensions.

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Câu hỏi của người mua

Câu Hỏi Thường Gặp

How do you build a concave (inward-curving) LED wall from straight-edged cabinets?

You don't bend the cabinets — you angle them. Each straight 600×337.5mm cabinet sits on a custom curved floor-standing frame, and a wedge-shaped arc connecting plate between every pair of cabinets sets the exact pivot angle so the flat faces follow the curve. This is how 208 straight COB Pro cabinets became one smooth 15.6m concave arc with no visible facet lines.

Why use COB Pro instead of a flexible LED panel for a concave wall?

Flexible SMD panels bend natively, but give up the image quality COB Pro provides — 10,000:1 contrast, flip-chip uniformity, and a sealed 5H surface that tolerates cleaning and accidental touch. A corporate showroom is viewed from 1.5–2m, where those differences are obvious. The frame-and-plate approach keeps COB Pro's image quality while delivering the curve.

What viewing distance does P1.25 COB support?

P1.25 COB supports comfortable viewing from about 1.25m and beyond — individual pixels become indistinguishable at that distance. Corporate showroom visitors typically stand 1.5–2m from the wall, so P1.25 gives a retina-crisp image with margin. It's the right pitch when the wall is a focal point viewed at conversational distance rather than from across a large hall.

What video processor does a 27-million-pixel COB wall need?

27 million pixels is about 3.25× a 4K signal. A single NovaStar H9 video wall splicer handles it with three H_20xRJ45 sending cards — each card drives up to 13 million pixels across 20 Ethernet ports. Three cards give 39 million pixels of headroom and 60 ports, of which 42 are active. The rough formula: total pixels ÷ 650,000 = minimum active ports.

Can the concave curve use a different radius, or multiple curves?

Yes. The curved frame and arc connecting plates are CNC-machined per radius, so any concave radius is possible — and S-curves or convex arcs use the same principle with the plates flipped. For each project we take your room dimensions and viewing distance, calculate the arc geometry, and machine the frame and plates to match. No new cabinet tooling is required.

What is the lead time for a custom concave COB showroom wall?

About 4 weeks from order to operational display. COB Pro P1.25 cabinets are standard production items; the custom arc frame and connecting plates are CNC-machined in parallel, and the full wall is pre-assembled and aged in our Shenzhen factory before shipping. Pre-assembly cuts on-site installation time significantly, since the arc geometry is already locked before the frame arrives.

What certifications do DOIT VISION COB Pro displays carry?

DOIT VISION holds CE, EMC, RoHS company-wide. We serve 55+ countries and coordinate additional local certifications through accredited third-party labs when needed.

Do you provide remote support for overseas installations like Seoul?

Yes. Our Shenzhen engineers support installations across 55+ countries, including South Korea, with English-speaking engineers available during local business hours. For this Seoul project we provided remote commissioning — configuring screen mapping, arc alignment checks, and color calibration. On-site commissioning is available for larger or more complex projects.

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Nhóm Kỹ thuật DOIT VISION 15 kỹ sư nội bộ · Cơ sở tại Thâm Quyến với 60 nhân viên · Xét bởi Kris LiangĐồng sáng lập · 19 năm kinh nghiệm kỹ thuật màn hình LED · Đã phục vụ hơn 55 quốc gia