Selective Light-Transmitting Layer for Under-Display Optical Sensors

The patent applies local quality by making the light-blocking layer selective in its light-blocking properties. Specifically, the light-blocking layer is designed to block visible light while allowing infrared light to pass through. This is achieved by using materials or structures with specific optical properties that differentiate between different wavelengths of light. The local quality principle is applied at the material level, where the light-blocking layer has different transmission characteristics for different types of light, thereby simultaneously protecting the sensing function from visible light interference while maintaining aesthetic appearance by preventing reflected light visualization.

The patent employs parameter changes by altering the optical transmission parameters of the light-blocking layer. Instead of using a conventional light-blocking layer that blocks all light, the patent modifies the layer's properties to selectively block visible light wavelengths while transmitting infrared light wavelengths. This parameter change is achieved through material selection or structural design that creates wavelength-dependent transmission characteristics. By changing the transmission parameter from uniform blocking to selective wavelength-based blocking, the patent resolves the contradiction between sensing function protection and aesthetic appearance.

The patent applies local quality by creating a light-blocking layer with spatially varying properties. The layer includes regions with different light transmission characteristics: areas with openings that allow infrared transmission while maintaining visible light blocking, and areas without openings that provide both visible light blocking and structural support. This local differentiation enables the opening regions to facilitate optical sensor operation while the surrounding blocked regions prevent reflected light visualization, thereby resolving the aesthetic contradiction.

The patent employs composite materials or composite structures in the light-blocking layer to achieve simultaneous visible light blocking and infrared light transmission. The light-blocking layer may consist of multiple material layers or a composite material with specific optical properties that allow selective wavelength transmission. This composite approach enables the opening regions to transmit infrared light for sensor operation while the material composition maintains visible light blocking to prevent reflected light visualization, thus resolving the contradiction between sensor function and aesthetics.

The patent applies parameter changes by fundamentally altering the light transmission parameters of the light-blocking layer from uniform blocking to wavelength-selective blocking. The layer is designed with specific optical parameters that allow it to block visible light wavelengths (400-700nm) while transmitting infrared light wavelengths (>700nm). This parameter change is achieved through material selection with specific bandgap properties or structural design that creates wavelength-dependent transmission. By changing the transmission parameter to be wavelength-selective rather than uniform, the patent simultaneously achieves aesthetic appearance (by blocking visible light) and optical sensor operation (by transmitting infrared light).

The patent applies local quality by creating regions in the light-blocking layer with different optical properties. The layer includes openings or regions with modified properties that specifically allow infrared light transmission while maintaining visible light blocking capabilities. This local differentiation enables specific areas to facilitate infrared transmission for sensor operation while other areas maintain strong visible light blocking for aesthetic purposes, thereby resolving the contradiction between appearance and functionality.