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COB Strip Dam Structure Technology
Dam Structure COB LED Strip: Definition and Advantages
Definition
A dam structure COB (Chip-on-Board) LED strip is an advanced lighting technology where LED chips are mounted directly on a substrate (e.g., aluminum or copper base) and encapsulated by a specialized "dam glue" structure. This dam structure consists of two parallel glue barriers flanking the LED chips, which physically confine the phosphor-containing encapsulation layer (e.g., pull-glue or dot-glue layers) above the chips34. Unlike traditional COB strips, this design narrows the beam angle to approximately 145°, creating a more focused light output1.
Key Advantages
Enhanced Light Control
The dam barriers prevent lateral light dispersion and minimize color deviation (e.g., green light leakage), ensuring consistent color uniformity from end to end. This results in high color accuracy (CRI >90) and reduced chromatic aberration13.
Improved Reliability
The dam glue secures LED chips during encapsulation, preventing positional shifts and physical damage. It also contains the encapsulation material, eliminating spillage and ensuring robust protection against environmental stressors (e.g., vibrations, humidity)34. This extends the product’s lifespan and reduces failure rates.
Higher Production Efficiency
By stabilizing chips and encapsulant, the dam structure streamlines the manufacturing process. It enables selective dot-glue application on specific chips (e.g., alternating intervals), allowing customizable brightness/color zones without complex circuitry36.
Optimized Thermal Management
Copper/aluminum substrates offer superior heat dissipation, reducing thermal degradation. Combined with the dam’s protective role, this maintains luminous efficacy (up to 400 lm/m) even under high-power operation15.
Application Versatility
Ideal for scenarios demanding precision lighting—commercial displays, architectural accent lighting, and photography—where focused beams and color fidelity are critical