Vehicle Headlamp Optical Deflection for Heater-Free Defogging

The patent replaces the mechanical/thermal heater system with an optical system. Specifically, it uses an optical probe apparatus that emits infrared light to heat only the fogging on the outer lens surface, rather than using wire heaters that heat the entire lamp chamber. This substitution of heating method resolves the contradiction by achieving fogging removal without excessive overall temperature increase.

The patent applies local quality by directing infrared light specifically to the fogging-affected regions of the outer lens. The optical probe apparatus emits infrared light that is absorbed by the fog droplets, heating only the localized fogging areas rather than the entire lamp chamber. This localized heating approach enables effective fogging removal while maintaining appropriate overall temperature levels.

The patent implements periodic action by controlling the optical probe apparatus to emit infrared light only when fogging is detected. The system uses a fogging detection unit to monitor the outer lens surface and activates the infrared heating only when needed, rather than continuous operation. This periodic activation reduces energy consumption while maintaining reliable fogging removal capability.

The patent applies self-service through the fogging detection unit that automatically monitors and triggers the infrared heating system only when fogging is present. The system serves itself by detecting its own operational needs and activating the appropriate countermeasure, eliminating the need for continuous energy consumption and enabling on-demand fogging removal.