Abstract: A projection method and system, and an electronic device are provided. In this method, a user can drag a projection window in a remote device to a local device. For example, the user may drag the projection window in the remote device to the local device by using a mouse. The user may drag the projection window from the local device to the remote device. The user may adjust, on the local device, a size of the projection window displayed on the local device. In the technical solution provided in this application, a user operation is simple during projection.

Abstract: A device control method includes: a destination projection device, after displaying a projection window of a source projection device, that generates a touch slide event in response to a touch slide operation performed by a user by sliding from outside the projection window to inside the projection window, and when a start touch point of the touch slide operation is located in a target area, converts the touch slide event into an edge slide event of the source projection device, and then sends the edge slide event to the source projection device, where the target area is an area formed by extending a preset distance outward from an edge of the projection window; and the source projection device updates screen display content based on the edge slide event after receiving the edge slide event.

Abstract: A first electronic device displays a first interface including first content, where the first interface further includes a status bar and/or a navigation bar of the first electronic device. A second electronic device displays a first projection window including the first content, where the first projection window further includes any one of the status bar, the navigation bar, and a title bar of a projection application. The first electronic device switches from displaying the first interface to displaying a second interface, where the second interface includes second content, and the second interface does not include the status bar and the navigation bar. The second electronic device switches from displaying the first projection window to displaying a second projection window, where the second projection window includes the second content, and the second projection window does not include the status bar, the navigation bar, and the title bar.

Abstract: In a surface modification method for fluoride luminescent materials, an inorganic coating layer AxMFy coated substrate AxMFy:Mn4+ is mixed with an organic solution containing a metal phosphate, an alkoxysilane, an organic carboxylic acid or an organic amine. The solution is evaporated to give the organic-inorganic coating layer coated surface-modified fluoride luminescent material. The phosphor photoluminescence intensity and quantum efficiency of the modified phosphors can be maintained at 85%-95% under high temperature and high humidity conditions. After being coated with the inorganic coating layer, the surface defects of the phosphor are reduced, and the photoluminescence intensity and quantum yield of the phosphor are increased by 5%-15%. After being coated with the organic coating layer, the photoluminescence intensity of the phosphor is reduced <3%.