Backlight Module Reflector Sheet Protrusion Thermal Shrinkage

The reflector sheet is designed with protrusions at specific locations (corners and/or edges) that have different functional properties from the rest of the sheet. These protrusions serve as localized constraint points that limit thermal movement while allowing the majority of the reflector sheet to maintain its reflective function. This localized structural modification resolves the contradiction by adding precision control only where needed rather than constraining the entire sheet.

The reflector sheet is segmented into a main body area and protrusion elements. The protrusions are separated from the main reflective surface, allowing independent functional optimization. The protrusions handle the constraint function while the main body maintains light reflection, thus achieving both manufacturing simplicity and display uniformity.

Instead of adding complex constraint mechanisms across the entire reflector sheet, the invention applies simple protrusion structures only at specific locations (corners and/or edges). These localized protrusions provide the necessary thermal movement constraint without requiring complex overall structural modifications, thus improving display uniformity while minimizing device complexity.

The protrusions on the reflector sheet serve dual functions: they maintain the light-reflecting capability of the reflector sheet while simultaneously providing self-constraint against thermal shrinkage movement. The reflector sheet structure itself provides the constraint function through its protrusions, eliminating the need for separate constraint mechanisms.

The protrusions are designed as simple localized extensions from the reflector sheet edges or corners, requiring minimal additional material and fabrication steps. By concentrating the structural modification only at perimeter locations rather than across the entire reflective surface, the light reflection area is preserved while manufacturing complexity is kept low.

The reflector sheet is divided into the main reflective body and separate protrusion elements. This segmentation allows the protrusions to be formed through simple edge modifications or additions during the manufacturing process, maintaining ease of fabrication while ensuring the protrusions effectively limit thermal movement and preserve the light reflection area.