Edge Type Backlight Module COF Thermal Management

The backlight module is divided into multiple light source regions (first light sources at the edge and second light sources at the bottom), separating the lighting function from the heat generation location. This segmentation allows the COF area to be positioned in a lower temperature zone while maintaining adequate illumination through the light guide plate.

Different regions of the backlight module are assigned different functions: the edge region provides primary illumination while the bottom region provides supplemental lighting and serves as a heat distribution zone. The COF is specifically positioned in the lower temperature bottom region, creating local quality differences in temperature distribution.

The light source arrangement transitions from a single-dimensional edge placement to a two-dimensional configuration involving both edge and bottom regions. This dimensional expansion distributes heat generation across multiple locations rather than concentrating it at the edge, reducing peak temperatures.

The heat generated by the LED light bars is redirected to serve a beneficial function by positioning the COF in a region with more moderate temperatures. The thermal energy that would otherwise degrade the COF is instead distributed to areas where it does not cause reliability issues, and the alternating light source configuration ensures adequate illumination is maintained.