It is used in the backlight module to reflect the light exposed on the bottom surface back to the light guide plate to improve the efficiency of light use Product structure: heavy film/glue/light film Heavy film: AS4/AS4#75HRPET Adhesive: Teraoka 7692 high and low sticky Light strength film: S75C30 Quality points: 1) High requirements for appearance and cleanliness 2) Low silicon rotation