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GOB Technology in LED Displays | TENSHANG
2026-04-27
Core Definition
GOB (Glue on Board)is an advanced packaging and surface protection technology for Led Displays, evolved from the mature SMD (Surface Mount Device) packaging process. It is a high cost-performance, ruggedized solution that applies a seamless, high-transparency optical-grade polymer adhesive layer over the entire surface of a soldered SMD LED module, fully encapsulating the PCB board, LED lamp beads, and solder joints to form an integrated protective barrier, without altering the core electrical structure of the original SMD design.
Working Principle & Core Manufacturing Process
GOB technology retains the inherent light-emitting characteristics of traditional SMD LED displays, with a streamlined and mature production flow:
- Complete reflow soldering of SMD 3-in-1 LED chips onto the PCB board, followed by initial performance and quality testing;
- Clean the module surface, then use high-precision automated dispensing or vacuum molding equipment to evenly fill the gaps between LED beads with nano-grade optical adhesive (modified epoxy resin or polyurethane, with light transmittance ≥95%);
- Cure the adhesive via UV or thermal process, forming a flat, sealed protective film with flatness error controlled within ±0.01mm;
- Perform final performance testing on the cured GOB module to ensure display quality and protective performance meet standards.
Key Advantages of GOB LED Displays
1. Industry-leading ruggedness and environmental adaptability
The cured adhesive layer delivers IP54 to IP65 level protection, providing comprehensive waterproof, dustproof, moisture-proof, anti-collision, and anti-static performance. It effectively prevents LED bead falling off, solder joint cracking, and pixel failure caused by bumps during transportation, installation, and daily use. GOB displays can operate stably in harsh environments with temperatures ranging from -40°C to +100°C and humidity up to 95%, with impact resistance more than 3 times that of traditional bare SMD displays.
2. Optimized visual performance and viewing experience
The adhesive layer merges the discrete point light sources of SMD beads into a near-surface light source effect, improving light uniformity, widening the viewing angle up to 170° horizontal/vertical, reducing glare and moiré interference during shooting. It maintains high color consistency, a contrast ratio of up to 5000:1, and a high refresh rate of 1920Hz to 7680Hz, delivering flicker-free, smooth dynamic display performance.
3. Lower total cost of ownership and easy maintenance
GOB technology is fully compatible with existing mature SMD production lines, with significantly lower manufacturing costs than COB (Chip on Board) technology. Unlike fully sealed COB modules, GOB displays support on-site rapid maintenance of single pixels, with maintenance costs only about 1/3 of COB products. The seamless, flat surface is also easy to clean and maintain in long-term use.
GOB vs. COB: Core Technical Differences
| Feature | GOB LED display | COB LED Display |
|---|---|---|
| Core Process | SMD packaging + surface adhesive coating | Direct chip mounting on PCB, fully integrated encapsulation |
| Protection Level | IP54-IP65 | IP65+ |
| Pixel Pitch Support | Mainly P1.0 to P2.5, hard to break through P0.8 | Ultra-fine pitch down to P0.4-P1.2, for ultra-high resolution |
| Maintenance | On-site single-pixel repair, low cost | Module-level replacement, high maintenance cost |
| Cost | Lower upfront and maintenance cost, high cost-performance | Higher manufacturing cost |
TENSHANG GOB LED Display Technology & Product Portfolio
TENSHANG integrates industry-leading GOB technology into its full range of LED display products, creating a rugged, high-performance display solution for global commercial and industrial scenarios:
- Full pixel pitch coverage: TENSHANG GOB series covers mainstream pixel pitches including P1.25, P1.53, P1.86, P2, P2.5, P3, P3.91, etc., meeting both indoor fine-pitch and semi-outdoor high-brightness display needs;
- Premium component configuration: Adopts high-quality LED chips from top brands (Nationstar, Kinglight, San'an), stable high-brush driver ICs, and is fully compatible with mainstream control systems (Novastar, Colorlight, Linsn, Huidu), ensuring long-term stable operation;
- Customized solution capability: TENSHANG provides customized GOB display solutions for special scenarios, including flexible curved GOB screens, interactive LED floor tiles, rental stage screens, and high-protection transportation hub displays, balancing display quality, durability, and cost efficiency.
Typical Application Scenarios
GOB technology is ideal for scenarios with high requirements for durability, frequent movement, or harsh operating environments, including:
- Rental and stage events, exhibition displays
- Commercial retail, shopping mall digital signage
- Transportation hubs, subway stations, airports
- Indoor interactive installations, LED dance floors
- Semi-outdoor window displays, high-humidity industrial sites
