Accessory, electronic assembly, control method, and method for forming an accessory

A protective cover covering an electronic device, wherein the electronic device has a display area and the protective cover comprises:

• a coupling portion coupled to the electronic device;
• and
• a cover portion coupled to the coupling portion, the cover portion being flipped, rotating with respect to the coupling portion, to cover the display area of the electronic device, and the cover portion including:
• a transparent layer,
• a first layer disposed on one side of the transparent layer and having a plurality of first apertures;
• and
• a second layer disposed on the other side of the transparent layer and having a plurality of second apertures, each of the plurality of first apertures of the first layer corresponds to one of the plurality of second apertures of the second layer, wherein the plurality of the first and second apertures with the transparent layer form a plurality of light-transmitting areas, wherein the plurality of light transmitting areas are arranged in an array, wherein when the cover portion covers the display area, an image is displayed by the display area, wherein the first image displayed by the display area contains a plurality of discrete blocks each of the plurality of blocks corresponds to one of the plurality of light transmitting areas, and each of the blocks contains a plurality of pixels, and the image is projected out of the corresponding light transmitting areas as a projected image forming a dotted character, a dotted symbol, or a dotted pattern.