Keyboard Backlight Module Light Leakage Prevention via Attaching Layer

A filling structure is introduced as an intermediary element that occupies the penetrating holes in the light guide plate. This filling structure prevents light from leaking through the holes while still allowing pillars to pass through and air to flow for heat dissipation, thus resolving the contradiction between structural function and light leakage prevention

The filling structure is applied locally at the penetrating holes where light leakage occurs, rather than modifying the entire light guide plate. This localized solution prevents light leakage at critical points while maintaining the overall structural integrity and functionality of the keyboard assembly

The attaching layer is designed as a thin film structure that attaches the masking plate to the light guide plate, blocking light leakage through penetrating holes while maintaining minimal thickness. This thin film approach prevents light from escaping through the side walls of penetrating holes without significantly increasing the overall thickness of the backlight module

Instead of blocking light leakage by adding thickness in the vertical dimension, the solution uses the attaching layer to create a sealed structure that redirects light leakage prevention to a different dimensional approach, where the attaching layer forms a barrier that prevents light from escaping through penetrating holes while maintaining compact thickness