Optical Sensor Module Lead Frame Light Leakage Prevention

The patent merges the light-blocking function with the existing structural components by making the housing itself serve as the light-blocking wall. The housing is designed with light-blocking properties and positioned to naturally separate the light-receiver from the light-emitters, eliminating the need for additional dedicated light-blocking components. This integration reduces structural complexity while maintaining effective light leakage prevention.

The patent employs a composite structure where the housing is made from a material with superior heat dissipation properties compared to the PCB. The housing serves dual purposes: providing structural support and acting as a heat dissipation pathway. This composite approach allows the module to maintain manufacturing simplicity while significantly improving heat dissipation performance through the strategic use of thermally conductive materials in the housing.

The patent applies local quality by creating a light-blocking environment specifically in the regions between the light-receiver and light-emitters, while maintaining their close proximity for compactness. The housing is designed with light-blocking walls positioned strategically to block direct light paths from emitters to receiver, while allowing the components to remain closely spaced. This localized light-blocking approach enables compact device size without sacrificing performance by preventing light interference.