SMD vs GOB vs COB LED Screens: Which One Do You Need? (2026 Guide)

“SMD screen” is what most people in Pakistan call any LED screen. But the way the LEDs are mounted and protected makes a big difference to how the screen looks up close, how long it lasts and what it costs.

This guide explains the main types of LED screens DIGIX supplies: SMD, GOB, COB, transparent and flexible. It shows where each one makes sense, so you only pay for what your project needs.

1. The Five Types at a Glance

Type	How it is built	Best for	Typical pitch	Price vs SMD
SMD	Each LED is a small package soldered onto the board	Most indoor and outdoor screens	P1.5 – P10	Base price
GOB	SMD with a clear glue layer poured over the LEDs	Malls, events, rental, screens people can touch	P1.5 – P4	About +30%
COB	LED chips mounted directly on the board and sealed in one surface	Boardrooms, control rooms, studios, luxury retail	P0.9, P1.2, P1.5, P1.8	About +60%
Transparent	LED strips with open gaps so you can see through the screen	Shop windows, glass façades, showrooms	Depends on model	On request
Flexible	Soft modules that bend	Pillars, curves, waves and creative shapes	Depends on model	On request

Prices are a rough guide for the same size and pitch. Your exact price depends on brand, size, structure and site conditions.

2. SMD LED Screens

SMD stands for Surface Mounted Device. Each pixel is a tiny package with red, green and blue LEDs, soldered onto the module. It is the most common LED technology in the world and the default choice for most projects.

• Strengths: the best value for money, a wide choice of pixel pitches and easy repair, as single LEDs can be replaced.
• Watch out for: the LEDs stand slightly above the board, so a hard knock can break one off. Indoor SMD screens are not protected against water or heavy dust.
• Best for: lobbies, retail stores, restaurants, halls and almost all outdoor billboards.

Some modern SMD modules, such as the Unilumin LC1.839P, also come with a nano coating. This thin protective layer helps keep the LEDs from falling off without the cost of full GOB.

3. GOB LED Screens (Glue on Board)

A GOB screen starts as a normal SMD module. A layer of clear, hard glue is then poured over the whole LED surface and cured. The result looks like a smooth sheet of glass over the pixels.

• Strengths: it protects the LEDs from knocks, dust, moisture and static. It is safe to touch and easy to wipe clean, and the matte surface reduces glare.
• Watch out for: it costs about 30% more than SMD, and repairs are done module by module instead of LED by LED.
• Best for: screens at hand height in malls and shops, event and rental screens that are set up and taken down often, and dusty or busy places.

4. COB LED Screens (Chip on Board)

In a COB module there are no separate LED packages. The bare LED chips are mounted directly onto the circuit board and sealed together under one flat, matte surface. It is the newest technology and the best choice for fine-pitch screens viewed up close.

• Strengths: very high contrast, deep blacks and no reflections. It is very tough, as there are no LEDs to knock off, and it resists moisture and dust. It runs cooler and uses less power.
• Watch out for: it costs about 60% more than SMD and is mainly made in fine pitches.
• Popular pitches: P0.9, P1.2, P1.5 and P1.8.
• Best for: boardrooms, control rooms, TV studios, experience centres and luxury retail, where people stand close to the screen.

5. SMD vs COB: Real Datasheet Numbers

Here is how two indoor Unilumin modules of a similar pitch compare, taken from the manufacturer’s datasheets. Both use the standard 320 × 160 mm module size.

Specification	SMD (nano coated), LC1.839P	COB, LC1.5
Pixel pitch	1.839 mm	1.53 mm
Pixels per module	174 × 87 (15,138)	208 × 104 (21,632)
Brightness	650 – 1,000 nits	500 – 600 nits
Contrast ratio	9,000:1	10,000:1
Average power	163 W/m²	130 W/m²
Maximum power	488 W/m²	285 W/m²
Refresh rate	3,840 Hz (7,680 Hz optional)	3,840 Hz and above
Viewing angle	160° / 160°	160° / 160°
Surface	Nano coated LEDs	Sealed, matte, no reflection
Lifespan	100,000 hours	100,000 hours

What this means: the COB module packs more pixels into the same module, gives deeper blacks and uses noticeably less power. The SMD module is brighter, which helps in bright, sunlit indoor spaces, and costs less.

Figures are the manufacturer’s reference values. Real results vary with configuration, content and environment.

6. Transparent and Flexible LED Screens

Transparent LED screens

Transparent screens are built from thin LED strips with gaps between them, so light and people’s view pass through. From outside, the content seems to float on the glass; from inside, the room stays bright and the view is not blocked.

• Best for: shop windows, glass building fronts, car showrooms and exhibition stands.

Flexible LED screens

Flexible modules use a soft base that bends, so the screen can wrap around round pillars or follow curves and waves.

• Best for: mall pillars, curved walls, ceilings and creative brand installations.

See flexible SMD walls in action in our projects gallery, for example the curved SMD walls at Ethnic’s Dolmen Mall flagship.

7. Which One Should You Choose?

Your situation	Our usual advice
Lobby, store or restaurant, viewed from 3 m or more	SMD, P2.5 – P4
Outdoor billboard or building façade	Outdoor SMD, P4 – P10
Screen at hand height, or in a busy mall corridor	GOB
Event or rental screen, set up and moved often	GOB
Boardroom, control room or studio, viewed from 1–3 m	COB, P0.9 – P1.8
Shop window or glass front	Transparent LED
Round pillar or curved wall	Flexible LED

Not sure about size and pixel pitch? Start with our free planner. It suggests the right pitch for your viewing distance and gives a tentative price for a standard SMD screen.

[digix_planner_cta title=”Plan your screen size and pixel pitch” text=”Enter your wall size and viewing distance – get the right pixel pitch, resolution, power use and a tentative SMD price in 60 seconds.”]

For GOB, add about 30% to the SMD estimate; for COB, add about 60%. For transparent or flexible screens, ask our team for a quotation.

8. Frequently Asked Questions

What is the difference between SMD and COB?

In an SMD screen each LED is a separate package soldered onto the board. In a COB screen the bare LED chips are mounted directly on the board and sealed under one surface. COB gives deeper blacks, a tougher surface and lower power use, but costs about 60% more.

What does GOB mean in an LED screen?

GOB means Glue on Board. A clear protective glue layer is poured over a normal SMD module to protect the LEDs from knocks, dust and moisture.

Is GOB better than SMD?

GOB is more durable, so it is better where people can touch the screen or where it is moved often. For a screen mounted high on a wall, standard SMD gives the same picture for less money.

Is COB worth the extra cost?

Yes, when viewers stand close, as in boardrooms, control rooms and studios, or when you need fine pitch below P1.8. For screens viewed from a distance, SMD is the better value.

Which pixel pitches are available in COB?

The most popular COB pitches are P0.9, P1.2, P1.5 and P1.8.

Are GOB and COB screens waterproof?

They resist moisture and dust much better than indoor SMD, but indoor GOB and COB screens are still meant for indoor use. For outdoor screens choose a weatherproof outdoor model.

Does DIGIX supply all these types?

Yes. DIGIX supplies and installs SMD, GOB, COB, transparent and flexible LED screens across Pakistan, with offices in Lahore, Karachi and Islamabad.

Get the right screen for your project

Tell us where the screen will go, its size and how close people will stand. Our team will recommend the right type and send an itemised quotation.

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