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Creative & Custom LED Displays Retrofitting P1.8 COB LED Stairs
at the Johnny Cash Museum
Integrating digital displays into new construction is straightforward. But embedding high-definition LED screens into a fully finished, high-traffic heritage site without altering the existing structure — that requires engineering. The Johnny Cash Museum asked DOIT VISION to transform a central 12-step wooden staircase into a dynamic digital canvas. Using value engineering with standard 320×160mm COB modules, ultra-slim aluminum profiles, and impact-resistant epoxy encapsulation, the entire system was designed, manufactured, and delivered in just 15 days.
At a Glance
The Strict Dimensional Constraints
The client provided the exact, unchangeable dimensions of the existing staircase:
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Total Steps12 risers
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Riser Height5 7/8" (approx. 150mm)
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Riser Width11 steps at 77.5" (1968.5mm) + 1 bottom step at 61" (1549.4mm)
The dilemma was clear. Standard LED cabinets are bulky — usually 500×500mm or 1000×250mm — which would completely ruin the depth of the stairs or protrude past the rounded lips of the wooden treads. Custom-sized PCB boards for a relatively small 12-step project would skyrocket R&D costs and blow the museum's budget.
Standard Modules, Custom Results
Instead of reinventing the wheel with expensive custom circuit boards, our engineering team looked at the client's dimensions and immediately identified a mathematical synergy with our standard mass-produced modules.
We selected our standard 320×160mm P1.8 COB LED modules. The 160mm module height was a near-perfect fit for the 150mm exposed riser height, maximizing visual area without a single custom PCB. By placing 6 modules horizontally (320mm × 6), we achieved an exact width of 1920mm — perfectly centered within the 1968.5mm stair width with a clean, symmetrical margin on both sides.
This value engineering approach — using standard modules creatively instead of designing bespoke PCBs — saved the museum tens of thousands in custom fabrication costs while keeping the 15-day delivery timeline achievable.
Ultra-Slim Profile Design & Wiring
We engineered custom ultra-slim aluminum profile cabinets measuring exactly 1920×160mm — rigid backbones that added minimal depth to the existing stairs.
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Direct Screw-MountingBecause the stairs were wood, the local crew simply drove screws from behind the stairs directly into the aluminum frames — no messy brackets, no structural alteration.
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100% Front-ServiceableCOB modules attach via heavy-duty magnets. If a module ever needs replacement, a technician pulls it off from the front with a suction tool — no disassembly required.
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Hidden InfrastructureAll power supplies and receiving cards were routed behind the hollow wooden stair structure, keeping the face of the stairs completely clean.
From Shenzhen to Tennessee in 15 Days
By heavily utilizing standard 320×160mm COB modules rather than drafting custom PCBs, we slashed the production timeline drastically. The complete 12-step system was manufactured, tested, and dispatched in just 15 days.
Upon arrival in Tennessee, the client's local crew handled the physical mounting smoothly thanks to the plug-and-play design. DOIT VISION's support team then stepped in via remote video link to map the 12 separate risers in software, digitally stacking them so that when the museum plays a video, content cascades seamlessly up and down the stairs as a single unified canvas.
True engineering mastery isn't always about building the most complex custom circuit board. Often, it's about having the intelligence to use standard, highly reliable components in creative ways to solve strict physical constraints, respect budgets, and crush delivery deadlines.
Why COB is Mandatory for Stair Displays
Specifying the right LED packaging technology is the difference between an installation lasting 5 years or 5 days. For any display installed at foot level, SMD is a liability.
The Vulnerability of SMD
Standard SMD (Surface-Mounted Device) screens consist of millions of tiny LED bulbs soldered onto a board. A single accidental kick from a shoe shears off multiple diodes, resulting in permanent dead pixels — unacceptable in a premium museum environment.
COB (Chip-on-Board) directly bonds the LED chips to the PCB, which is then completely coated and sealed in hardened epoxy resin. This creates a flat, smooth surface with 5H Hardness rating — highly resistant to scratches, kicks, and direct impacts. Because the surface is sealed, it's inherently water-resistant, meaning museum staff can safely wipe down and clean the stairs without damaging internal electronics.
Project Specs
15-Day Retrofit Process
Dimensional Capture
Fixed dimensions verified: 150mm risers, 1968.5mm / 1549.4mm widths. Value engineering identified 320×160mm module synergy.
Aluminum Profile Fab
Custom 1920×160mm ultra-slim aluminum profiles fabricated with rear screw-mounting points and magnetic module interface.
Production & Dispatch
12 complete COB stair assemblies manufactured, tested, and dispatched in 15 days. All power and data pre-routed.
Remote Pixel Mapping
Local crew handled physical mounting. DOIT VISION engineers mapped 12 risers remotely — content cascades as one unified canvas.
Planning a retrofit installation?
Don't demolish your existing architecture just to fit standard LED cabinets. Our engineering team uses ultra-slim profiles and standard module synergy to save you thousands in custom fabrication costs.
Frequently Asked Questions
Can LED displays be installed on existing staircases without demolition?
Why is COB mandatory for stair and floor LED applications?
What's the advantage of using standard modules over custom PCBs?
How do you map content across multiple stair risers as one canvas?
How fast can DOIT VISION deliver a stair LED retrofit?
Is front maintenance possible on stair LED installations?
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