Touch Key Window Structure for Bezel Light Leakage Blocking

The patent introduces light blocking members as intermediary elements between the touch key light source and the window bezel area. These members act as mediators that selectively block light in specific directions while allowing the touch key function to operate normally, thus resolving the contradiction between enabling the touch key and preventing light leakage.

The patent applies light blocking members with specific properties (black adhesive tape with particular thickness and optical characteristics) at specific locations (between the light source and the bezel area). This local application of specialized materials blocks light leakage in the problematic bezel area while maintaining light transmission where needed for the touch key icon visibility.

The patent employs black adhesive tape as the light blocking member, which is a simple, inexpensive, and easily replaceable material. This approach prevents light leakage using a low-cost solution that does not add significant complexity to the device structure, as adhesive tape is a standard component that simplifies assembly and potential replacement.

The patent uses thin film-based light blocking members (adhesive tape) that can be easily integrated into the existing device structure. These thin films conform to the required geometry and can be applied without modifying the fundamental structure of the window or light source assembly, thus preventing light leakage while minimizing increases in device complexity.