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COB LED Display Technology, Explained
Chip-on-Board Packaging · P0.62–P1.87 · 5 Product Lines
COB (Chip-on-Board) is the flip-chip LED packaging technology behind five of our product lines — COB Pro, COB Beta, COB Poster, COB Cube, and our All-in-One LED TV. This guide explains how COB works, how it compares to SMD and MIP, and which of our products is the right fit for your project.
Chip-on-Board: One Substrate, No Visible Seams
COB stands for Chip-on-Board. Instead of packaging each LED individually and mounting it onto a PCB like SMD (Surface-Mounted Device), COB bonds multiple flip-chip LEDs directly onto a single substrate, then encapsulates the whole surface. The result is a smoother, more uniform display surface with less visible pixel structure at close range, higher contrast, and better resistance to moisture, dust, and physical impact than individually packaged LEDs.
DOIT VISION has built flip-chip COB technology into five product lines — fine pitch (COB Pro, COB Beta), portable signage (COB Poster), creative cube displays (COB Cube), and integrated meeting-room displays (All-in-One LED TV). We’re a Shenzhen-based manufacturer founded in 2013, with 15 in-house engineers and products shipped to 55+ countries.
How COB Compares
COB is one of three main LED packaging routes. Here’s how it stacks up against the alternatives, with links to our full engineering breakdowns.
COB vs SMD
SMD packages each LED individually — cheaper up front, more design flexibility. COB bonds chips onto one substrate — seamless surface, better moisture resistance, lower 5-year maintenance cost.
Read TCO AnalysisCOB vs MIP
MIP factory color-bins each mini-LED before mounting, reaching 100,000:1 contrast and single-LED field repair at a 20–40% premium over COB Pro. COB Pro is the standard choice for most control rooms.
Read Full GuideCOB vs GOB (Poster)
For LED posters specifically, COB competes with GOB (Glue-on-Board) encapsulation. Different durability, cost, and repair trade-offs for portable, frequently-moved digital signage.
Why COB Is Growing
Micro COB adoption has accelerated in fine pitch since 2024 as chip yields improved and prices dropped closer to SMD. Where the market is heading through 2026.
Read Market ViewWhere COB Lives at DOIT VISION
Each COB product targets a different buying scenario. Pick the one that matches your application, then go to its detail page for full specs and pricing.
COB Pro
Our 16:9 flagship. Flip-chip COB, 600×337.5mm cabinets, built for control rooms, broadcast studios, and premium indoor video walls.
View Details
COB Beta
4:3 value tier COB. Sized for multi-screen control walls and retail displays where budget matters more than 16:9 framing.
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COB Poster
Freestanding digital signage with flip-chip COB panels. Built-in wheels and speakers, 2K/4K, for retail, hospitality, and exhibitions.
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COB Cube
Seamless 90° right-angle cube display with magnetic front service. Custom sizing for showrooms, retail, and museums.
View Details
All-in-One LED TV
COB-integrated display for meeting rooms and control rooms — no external processor needed, dual OS, interactive touch.
View DetailsCOB Installations We’ve Documented
No stock photos — every case below is a real DOIT VISION project with the problem, the fix, and the result written up.
33sqm Immersive P0.9 COB Showroom, New Jersey
Corner-wrap COB Pro wall with 90° pixel-offset mapping for a seamless immersive brand experience.
Read Case Study
42sqm Concave COB Pro P1.25 Showroom Wall, Seoul
Curved cabinet engineering for a concave showroom feature wall without visible seams.
Read Case Study
3m Suspended Borderless Circle & Halo Array, Bangkok
Ceiling-suspended circular COB display with a supporting halo array for a hospitality atrium.
Read Case Study
Casino Gaming Machine P1.86 COB Beta LED Wrap
Custom-cutout COB Beta panels wrapped around a gaming machine chassis, poka-yoke assembly.
Read Case Study
4-in-1 COB Prototype for AT&T Retail Pillars
Prototyping a 4-in-1 COB module to upgrade an existing national retail pillar rollout.
Read Case Study
Bespoke Hub Board for P0.78 COB Medical Device
Custom hub board engineering for an OEM partner embedding a P0.78 COB panel into a medical device.
Read Case StudyCOB Technology Articles
COB vs MIP vs SMD: Which LED Packaging Technology Is Right for Your 2026 Project?
A full breakdown of all three routes with a decision framework.
Read Guide
Is COB LED Worth the Premium? A 5-Year Maintenance Cost Analysis
Real numbers on where COB pays for itself over a 5-year install lifecycle.
Read Analysis
Why Micro COB LED Display Technology Is Winning the Fine Pitch LED Market in 2026
Chip yield improvements and pricing trends behind the shift toward COB.
Read Analysis
COB vs GOB vs SMD LED Poster: Which Encapsulation Survives the Real World?
Durability and repair trade-offs specific to portable LED poster signage.
COB LED Display FAQ
Answered by the DOIT VISION engineering team.
COB (Chip-on-Board) mounts multiple LED chips directly onto a single substrate before encapsulation, instead of packaging each LED individually like SMD. The result is a smoother surface with less visible pixel structure, higher contrast, and better moisture resistance. DOIT VISION uses flip-chip COB across five product lines: COB Pro, COB Beta, COB Poster, COB Cube, and our All-in-One LED TV.
COB Pro is our 16:9 flagship — 600×337.5mm cabinets, P0.62 to P1.875, up to 10,000:1 contrast, built for control rooms and broadcast studios. COB Beta is 4:3, 640×480mm cabinets, P1.25 to P1.86, sized for multi-screen control walls and retail. They use different cabinet dimensions and cannot be tiled together — decide your aspect ratio first.
It depends on the application, not a universal “better.” COB wins on seamlessness, contrast, and moisture resistance — better for immersive walls and control rooms. SMD wins on design flexibility and lower upfront cost. Full 5-year cost comparison in our COB vs SMD TCO analysis.
COB Pro delivers up to 10,000:1 contrast and covers P0.62–P1.875 at standard fine pitch pricing. MIP factory color-bins each mini-LED individually, reaching 100,000:1 contrast and single-LED field repair, at a 20–40% price premium. Choose MIP for 24/7 mission-critical screens; choose COB Pro for most control room and broadcast projects.
Novastar and Colorlight sending boxes and video processors are compatible with all our COB product lines — COB Pro, COB Beta, COB Poster, and COB Cube. We recommend the specific sending card and processor model based on your screen resolution and refresh rate requirement during quotation.
COB typically carries a premium over standard SMD at the same pixel pitch, since flip-chip mounting and encapsulation add manufacturing steps. The gap narrows at finer pixel pitches (below P1.5) where SMD’s own packaging cost rises. Exact pricing depends on pitch, cabinet size, and order volume — request a quote for a same-day number.
Five product lines: COB Pro (fine pitch, 16:9), COB Beta (fine pitch, 4:3), COB Poster (freestanding digital signage), COB Cube (4/5/6-sided creative display), and our All-in-One LED TV (108″–163″ integrated meeting room display). Each targets a different application — see the product cards above to find yours.
Not sure which COB
product fits your project?
Send us your screen dimensions and application. Our engineering team will recommend COB Pro, COB Beta, COB Poster, COB Cube, or All-in-One TV — with factory pricing and lead time — same day.