COB vs COG: Key Factors Shaping LCD Packaging Technology Choices
The choice between COB and COG LCD packaging technologies is increasingly critical for product designers, with clear trade-offs based on size, cost, and performance requirements. A comprehensive analysis from DGH Technology outlines core differences: COB (Chip on Board) excels in cost-sensitive small devices, while COG (Chip on Glass) dominates high-performance medium-to-large displays. COB’s integration on PCBs offers lower initial costs but limited heat management, making it suitable for calculators and simple meters. COG’s direct glass mounting enables thinner profiles (under 3mm) and better heat dissipation, ideal for automotive dashboards and medical equipment. Industry data shows that COG reduces prototyping time by 60% for small displays, as no PCB layout revisions are needed. However, COG’s higher tooling costs make it economical only for large-scale production. Manufacturers are increasingly adopting hybrid strategies, with BOE and TCL Huaxing developing COB-MIP combined solutions to balance pixel density and cost in ultra-large displays.
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