Understanding LED Encapsulation Adhesive in One Article
2026-06-04 15:29
LED light bulbs, TV backlights, and outdoor digital displays are everywhere in our daily lives. We tend to focus on the bright light sources themselves, yet we rarely pay attention to a crucial component hidden inside: the LED encapsulant adhesive. Though it may seem like just a small bottle of glue, this material is the key to ensuring that the entire LED device emits light reliably and lasts for years.
I. What is LED encapsulant?
The light-emitting chip inside an LED is highly precise yet fragile; when exposed to air, it is极易 susceptible to moisture-induced oxidation and damage, leading to failure. The encapsulation process involves fully coating the chip with a specialized adhesive, effectively giving the component a protective outer layer—this adhesive is known as LED encapsulant.
The encapsulant serves three core functions:
1. Protective chip: Isolates moisture and air to prevent corrosion and failure of the chip.
2. Adjusting the emitted light: As an optical medium, it can tailor the desired light parameters through phosphors and other materials.
3. Auxiliary heat dissipation: Helps the chip transfer heat away, extending its service life.
Without encapsulant, an LED may fail within just a few minutes of being turned on. The performance of the encapsulant directly determines the LED’s lifespan and light quality.
II. What types of encapsulating adhesives are there?
Currently, mainstream LED encapsulant adhesives are divided into two major systems:
Based on refractive index, silicone encapsulants are further classified into three types:
III. Betely Position in This Field
In the domestic push to localize LED encapsulation adhesives, Betely is one of the earliest local manufacturers.
More than a decade ago, the domestic LED encapsulant market was long dominated by major overseas manufacturers. Imported products were priced steeply, and supply lead times were frequently unstable, keeping procurement costs high for downstream LED manufacturers. Riding the wave of rapid development in China’s optoelectronics industry, Betely focused on mastering formulation technologies and mass‑production processes, successfully establishing in‑house production of silicone‑based LED encapsulants and breaking the industry’s exclusive foreign‑capital monopoly.
After years of product refinement and supply-chain validation, Betely products have now been successfully added to the supplier lists of leading LED manufacturers such as MLS and Zhaochi Shares. According to data from the industry research firm Zhongyan Puhua, in 2024 the company’s silicone‑based LED encapsulant achieved a 16% share of the domestic market. From starting from scratch to capturing nearly 20% of the market, this milestone reflects more than a decade of persistent efforts to advance domestic substitution.
In the next installment, we will take a detailed look at the evolution of Betely LED encapsulant and its technological breakthroughs in the Mini-LED field. Stay tuned!
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