In the ever-evolving world of semiconductor lighting, COB (Chip-on-Board) technology has emerged as a game-changer, especially in the realm of hotel and commercial store lighting. Its advantages—such as easier dimming, high brightness, and the ability to address chromatic aberration and multiple side spots—have solidified its place as the market's leading choice. Various domestic and international manufacturers have responded by launching an array of innovative COB products.
As COB technology matures, some domestic manufacturers now rival their foreign counterparts in terms of performance. In the pursuit of innovation, LED packaging giants have continued to refine their techniques. One notable advancement is the introduction of CCOB (Composite Cross-distribution COB), a two-color COB light source with a unique uniform cross-distribution composite package. The name CCOB stems from its compound and cross-distribution features: "Cross" refers to evenly distributed chips of different color temperatures, while "Compound" signifies a flip-chip structure combining a bare chip unit with at least one wrapped chip unit through phosphor layers.
Simplified, CCOB is a two-color COB light source with a composite package, allowing adjustments in brightness ratios to alter the light’s color. Major light source brands have embraced this concept, leading to a competitive landscape where features vary significantly. For example, the table below highlights key differences among several brands:
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To delve deeper into the dimming and color performance of CCOB, samples were provided by Guangzhou Tianxin Optoelectronics for evaluation. These ceiling lights, with a diameter of 135mm, use a lens and reflector system, offering a comprehensive view of how CCOB performs under real-world conditions.
The COB light source itself measures approximately 14mm in diameter, with visible yellow and white LEDs evenly spaced across the surface. This setup allows for seamless blending of colors, ensuring no noticeable color separation even during dimming. The results of these evaluations underscore the excellent light quality and mixing capabilities of CCOB.
Testing with a smart spectrometer revealed impressive metrics: a color temperature of 2811K, Duv of -0.0032, and an excellent color rendering index (Ra > 80, Rf > 80, Rg > 90). The stroboscopic percentage was minimal, making it ideal for prolonged indoor use. Further analysis showed consistent performance across varying brightness levels, with only slight increases in stroboscopic percentages when dimming.
The adaptability of CCOB extends beyond technical excellence. As smart lighting becomes increasingly prevalent, spaces like galleries, restaurants, and high-end homes require flexible color temperature and dimming options. From basic dimming to sophisticated color-matching systems, intelligent lighting Solutions are evolving to meet these demands, providing personalized experiences tailored to user preferences.
In conclusion, the integration of COB and CCOB technologies marks a significant leap forward in semiconductor lighting. As the industry moves toward smarter applications, these innovations not only enhance lighting performance but also create new opportunities for customization and functionality. Whether for residential, commercial, or hospitality settings, the future of lighting is undeniably smart, versatile, and exciting.
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