Integrated Light-Blocking Optical Sheet for LCD Backlight

The patent integrates the light-blocking function directly into the optical sheet by forming a light-blocking layer on the optical sheet itself, merging two separate components (optical sheet and light-blocking tape) into one unified structure. This eliminates the attachment interface that causes separation due to thermal expansion differences, while maintaining effective light leakage prevention.

By forming the light-blocking layer directly on the optical sheet, the patent eliminates the need for a separate light-blocking tape component. This integration allows the optical sheet to maintain its thin profile while still providing adequate light-blocking functionality through the integrated layer, removing the trade-off between thickness and attachment surface area.

The patent integrates the light-blocking function directly into the optical sheet structure, eliminating the separate light-blocking tape component that can detach and contaminate the display. This merger ensures that the light-blocking material remains permanently fixed to the optical sheet, preventing impurity generation while maintaining effective light leakage prevention.

The patent integrates the light-blocking layer directly onto the optical sheet, reducing the component count from two separate parts (optical sheet and light-blocking tape) to a single integrated component. This simplification reduces assembly steps and eliminates the risk of attachment failure, while the light-blocking layer can still be applied using standard manufacturing processes.