US Patent 11202488 Sun shade

The present disclosure describes a sun shade and a parking shade for a parking lot that includes a plurality of parking spots and one or more driving lanes. One sun shade includes: a panel that is configured to be inflated with a lifting gas to create a buoyant force and comprises hooks or eyelets for attaching tethers; one or more photochromic surfaces that reversibly darken on exposure to ultraviolet radiation and are arranged on a top surface of the panel, wherein portions of the panel that overlap with the one or more photochromic surfaces are transparent; and one or more photovoltaic units that are arranged on the top surface of the panel.