Movable Light Guide Member for Direction Control

The patent applies the dynamics principle by making the light guide member movable relative to the light-emitting unit through a movement mechanism. This allows the light guide member to be positioned at different locations, thereby changing the radiation direction of light dynamically without requiring multiple fixed optical components for each direction. The movable light guide member enables adaptable light direction control while maintaining a relatively simple device structure.

The patent applies the intermediary principle by introducing a light guide member as a mediator between the light-emitting unit and the external environment. The light guide member receives light from the light-emitting unit, guides it through its internal structure with reflective surfaces, and directs it toward specific radiation directions. This intermediary component significantly improves light extraction efficiency by capturing and redirecting light that would otherwise be wasted, while maintaining a compact and manageable device structure.

The patent applies the universality principle by designing a single movable light guide member that performs multiple functions: it guides light from the light-emitting unit, controls the radiation direction through its positioning, and extracts light efficiently through its optical structure. This multi-functional component eliminates the need for multiple separate optical components (such as multiple lenses or reflectors for different directions), thereby achieving adaptable light direction control while maintaining a compact device size.