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根据 @范饭爱可乐 的评论补充一种更大的可能，那就是cof出了问题。 什么是COF，就是Chip On Flex,中文叫做覆晶薄膜，是将集成电路(IC)固定在柔性线路板上的晶粒软膜构装技术。

how to repair COF of LED TV SAMSUNG

COF应用于显示面板上，可以有效减小显示面板下边框D-Border的宽度，提高产品显示面积占比，给消费者带来更强的视觉冲击效果。 COF和COG产品D-Border对比图示. COF结构按照状态划分，可以分为： 卷状结构 和 片状结构；按照层数来划分，可以分为：单层COF和双层COF，接下来我们逐一说明。 1、卷状结构和片状结构. ①卷状结构. 卷状结构是由很多片状结构的COF排列而成，卷状COF不能直接使用，需要使用模具冲切成单片有效的COF后才能使用。 卷状COF示意 …

2020年6月8日 · COF IC is a flexible Printed packaging technology, which is used for transferring video signal data into the panel. This technology package gives the highest density and high reliability. In a COF IC have lots of passive components to provide better service. And this is a Two-layer flexible printed structure.

2020年9月19日 · 驱动IC主要是控制液晶层电压从而控制每个像素亮度,FPC是充当显示模组和主板的连接载体。 目前主流的屏幕的封装工艺主要有三种,分别为COG、COF、COP。 具体来说,有以下特点: 图1:三种封装技术对比. 1、COG (Chip On Glass):这是最传统的封装方法之一,技术门槛低、成本低,是屏幕最常用技术。 从英文上也可以看出,这种方式的封装是将 IC芯片 、FPC排线放置在屏幕的背板玻璃上。 但由于IC芯片就在LCD的正下方,挤压了相当大部分的屏幕空间,因此不可 …

2021年6月10日 · As long as the water enters the LCD Panel PCB, it will corrode and seriously burn out the COF and OC. Because the user’s home is too tightly sealed and poorly ventilated in winter, it is easy to produce water vapor under the action of heating, which flows to the side along the screen On the board.

2024年4月8日 · COF（Chip On Film），即芯片贴膜技术，是一种将集成电路封装在柔性薄膜上的技术。 在液晶电视中，COF是用于将TCON板和液晶屏之间连接的芯片。 COF技术具有生产成本低、体积小、可靠性高等优点

2023年4月7日 · Connection, information diagrams about COF chip (Chip On Film) repair. COF chips are small chips used in LCD panels to multiplex digital video signals. The diagrams indicate test points for operating voltages. COF faults result in errors such as a blank screen, gradual blackout, or colored horizontal lines.