Illumination device

An illumination device, comprising:

• a substrate including a light-emitter;
• an instrument main body including a substrate arrangement surface, the substrate being on the substrate arrangement surface;
• a cover that is attached to the instrument main body, covers the substrate, and is transparent;
• an antenna on the cover and configured to receive a signal from an outside of the illumination device;
• a driver on the instrument main body and configured to supply power to the light-emitter;
• and
• a controller configured to control the power supplied from the driver to the light-emitter based on the signal received by the antenna,
• wherein the cover includes a diffusion factor from 40% to 90%, and
• the cover includes a rectangular shape in a planar view, and the antenna is on an end portion of the cover.

An illumination device, comprising:

• a substrate including a light-emitter;
• an instrument main body including a substrate arrangement surface, the substrate being on the substrate arrangement surface;
• a cover that is attached to the instrument main body, covers the substrate, and is transparent;
• an antenna on the cover and configured to receive a signal from an outside of the illumination device;
• a driver on the instrument main body and configured to supply power to the light-emitter;
• and
• a controller configured to control the power supplied from the driver to the light-emitter based on the signal received by the antenna,
• wherein the cover includes a diffusion factor from 40% to 90%,
• the antenna is on a transparent base material,
• the transparent base material is mechanically connected to the controller, and
• the antenna is electrically connected to the controller.

An illumination device, comprising:

• a substrate including a light-emitter;
• an instrument main body including a substrate arrangement surface, the substrate being on the substrate arrangement surface;
• a cover that is attached to the instrument main body, covers the substrate, and is transparent;
• an antenna on the cover and configured to receive a signal from an outside of the illumination device;
• a driver on the instrument main body and configured to supply power to the light-emitter;
• and
• a controller configured to control the power supplied from the driver to the light-emitter based on the signal received by the antenna,
• wherein the cover includes a diffusion factor from 40% to 90%,
• the antenna and the controller are wirelessly connected, and
• the power is supplied from the controller to the antenna by electromagnetic induction.