About a 4-minute read
An LED panel looks like one flat rectangle on the wall. Under the hood it’s five things working together: frame, module, power supply, receiving card, and hub.
You don’t need to become an engineer. You do need enough vocabulary to read a quote, ask better questions, and know what fails when a square goes dark on Sunday. That’s it.
1. Frame (the cabinet)
The frame is the skeleton. Die-cast aluminum is common because it’s stiff and holds alignment. Extruded aluminum shows up too — different manufacturing path, same job: keep the face flat and the seams tight.
Weight matters more than people think. A lighter cabinet is easier to hang and service. A heavier outdoor-style frame might be the right call for weather and wind — wrong call for a fine-pitch sanctuary wall. (If you’re still sorting outdoor vs indoor, start here: outdoor vs indoor LED panels.)
Alignment is everything. Pins, magnets, locks — they pull cabinets together so the wall doesn’t look like a quilt. Bad alignment = visible seams, no matter how pretty the modules are.
2. Module (the pixels you actually see)
Modules are the tiles of LEDs mounted on a board. Each pixel” is usually a cluster of red, green, and blue. You’ll hear SMD a lot (surface-mount diodes on the face). COB (chip-on-board) is another packaging approach you’ll see on some fine-pitch product — different build, same idea: make color and light.
On the module youve also got the IC driver chips that tell each LED how bright to be. That’s what turns a grid of lights” into a controllable image.
Pixel pitch lives here. Tighter pitch = more detail up close. Coarser pitch = fine when people sit farther back. Match the room, not the brochure brag.
3. Power supply
Every cabinet needs clean power. The power supply (PSU) converts wall power into what the modules and cards need. Ratings matter voltage, current, how much load the cabinet draws at the brightness youll actually run.
Certifications show up on quotes for a reason: FCC, UL, CE, and similar marks. They’re not decoration. For a church LED screen install, ask whats certified and how the electrical side gets signed off with your electrician and AHJ. Cheap mystery PSUs are a bad place to save money.
Different walls, different PSU layouts — how many supplies per cabinet, how redundancy works, how easy it is to swap one when it dies. Service access counts.
4. Receiving card
The receiving card is the brain in the cabinet. The processor / sending side pushes the signal; the receiving card takes its slice of the image and drives the modules in that panel.
Not all receiving cards are equal. Capacity (how many pixels they can handle), features, refresh behavior with cameras, mapping quirks, brand ecosystem — it varies. Touring and rental walls sometimes prioritize different tradeoffs than a fixed sanctuary install.
When a whole section of the wall goes weird — wrong colors, blank, scrambled — the receiving card (or its data path) is often in the suspect list. Knowing it exists already puts you ahead of “the screen is broken” as a diagnosis.
5. Hub (between card and modules)
The hub sits in the middle. It takes the receiving card’s output and fans it out to the modules the wiring / connector board that keeps data and sometimes power distribution tidy inside the cabinet.
It’s not glamorous. It’s also why a “simple panel isn’t just LEDs glued to aluminum. Bad hub connections = dead modules or intermittent tiles that drive tech teams crazy.
When youre shopping, you don’t need to memorize hub part numbers. You do want a design that’s serviceable: modules, cards, and supplies you can get to without tearing the whole wall apart.
Why this matters when youre buying
Quotes love marketing names. Your team lives with modules, cards, and power supplies.
Ask how cabinets lock together, what pitch fits your seats, how PSUs are rated/certified, which receiving-card ecosystem you’re in (and whether spares are realistic), and whether you can service a module or card without a full teardown.
That’s the practical layer on our products and LED video wall pages. More context: LED screen history. And when something fails next year: China-made panels and USA support.
Bottom line
Frame. Module. Power supply. Receiving card. Hub. Five parts. One wall.
You don’t need a datasheet tattoo. You need enough of the map to buy smart and troubleshoot calm. If you want help matching those pieces to your room, contact Visualize LED — we’ll talk like humans, not like a coil of ribbon cable.
FAQ
What are the 5 components of an LED panel? Frame (cabinet), LED module, power supply, receiving card, and hub board.
What’s the difference between a module and a panel? A module is the pixel tile. A panel (cabinet) is the frame plus modules, power, card, and hub assembled as one unit you hang on the wall.
Why does the receiving card matter? It takes the video signal for that cabinet and drives the modules. Card choice affects capacity, features, and how you map the wall.
Do churches need to pick every part separately? Usually you buy a complete cabinet system. Still worth knowing the five pieces so quotes and service calls make sense.
