Abstract: An integrated circuit (IC) structure includes a substrate having several regions, several semiconductor devices formed at the substrate and respectively within the regions, and an ultra-deep (UD) trench isolation structure formed in the substrate. The substrate has a top surface and a bottom surface oppositely, and the UD trench isolation structure formed in the substrate surrounds peripheries of each of the regions for structurally and physically isolating the semiconductor devices within different regions. The UD trench isolation structure penetrates the substrate by extending from the top surface of the substrate to the bottom surface of the substrate.

Abstract: An icon display structure includes a display panel including a silkscreen interlayer, a diffusion sheet, and a light source. The diffusion sheet includes a light transmission zone. The silkscreen interlayer includes a silkscreen icon and defines a hollow icon. The silkscreen icon is aligned with the hollow icon and appears directly on the display panel. The light transmission zone of the diffusion sheet is aligned with the silkscreen icon and the hollow icon. The light source is positioned behind the diffusion sheet. The light source emits light and the light transmits through the light transmission zone and the hollow icon to light up the silkscreen icon on the display panel.

Abstract: An air purification device includes a housing, an air quality sensor, an LED light group, and a controller. The air quality sensor is mounted within the housing and detects air quality parameters in real time. The LED light group is mounted within the housing and includes at least one LED light. The controller is mounted within the housing and controls the at least one LED light of the LED light group to emit light of a corresponding color according to the air quality parameters. The emitted light corresponds in color to indicate an air quality.