Curved Light Guide Plate Protection Member Curvature

The patent introduces a protection member as an intermediary component between the curved light guide plate and the light source. This protection member has a curvature different from the light guide plate, creating a buffer zone that prevents direct contact and deformation transfer. The protection member acts as a mediator that allows the light guide plate to maintain its curved shape for optical performance while preventing it from deforming and damaging the light source during use.

The patent applies beforehand cushioning by providing a protection member with a different curvature than the light guide plate before thermal expansion occurs. This protection member creates a predetermined buffer space that accommodates the thermal expansion of the light guide plate. When the light guide plate expands due to heat from the light source, the buffer space absorbs the expansion, preventing the light guide plate from contacting and damaging the light source.

The protection member serves as an intermediary that maintains an optimized gap between the light guide plate and the light source. This gap is carefully controlled to ensure sufficient light extraction efficiency while preventing direct contact. The protection member allows the light guide plate to be positioned close enough to the light source for efficient light extraction, but prevents it from contacting the light source during thermal expansion and deformation, thus maintaining both efficiency and reliability.