Do COB LEDs generate heat?

When current passes through COBLED, it inevitably generates heat despite its efficient design. This phenomenon has aroused people's curiosity: Why can't we feel its significant heating? To answer this question, we must delve into COBLED technology and its relationship with heat generation. COBLED, or Chip on Board LED technology, aims to improve light efficiency and light output by attaching LED chips directly to circuit boards, while theoretically reducing energy losses. However, according to Joule's law, the heat generated when current passes through a conductor is proportional to the square of the current, the resistance, and the power-on time. Even COBLEDs with higher efficiency cannot completely escape this natural law.

Due to the dense arrangement of multiple LED chips in the COBLED package, the current flows in a small area, which increases the local resistance and generates more heat. So why don't we feel obvious heating when using COBLED products? The key lies in the advanced heat dissipation design used in COBLED technology. This design uses high thermal conductivity materials and an expanded heat dissipation area to effectively conduct and disperse the generated heat, thereby keeping the surface temperature of the device at a low level.

In addition, in practical applications such as stage lighting or outdoor billboards, in order to further reduce the impact of heat on LED performance, fans, heat sinks and even liquid cooling systems are used to help cool down and ensure stable operation of the equipment. Although COBLED generates a certain amount of heat during operation, its unique design concept and heat dissipation mechanism enable it to find a perfect balance between high efficiency and temperature control. From TV backlights to car headlights, COBLED is gradually occupying an important position in the lighting industry with its excellent light quality and low heat characteristics. Therefore, although it is impossible to completely avoid heat generation, through scientific design and reasonable heat dissipation measures, COBLED has successfully achieved its excellent performance in a variety of application scenarios.