Abstract: A contactless key is provided, including a substrate, a plurality of light-emitting elements, a light-blocking element, and an imaging film. The light-emitting elements are fixed to the substrate. The light-blocking element is fixed to the substrate. The light-blocking element has a plurality of accommodating spaces, a first surface, and a second surface. The first surface is opposite the second surface, and the first surface has a plurality of light outlets. The accommodating spaces penetrate through the first surface and the second surface and communicate with each other via the light outlets. The light-emitting elements are respectively located in the accommodating spaces. The imaging film is opposite the first surface.

Abstract: A contactless button includes a shell, a circuit board, a signal-transmitting element, a signal-sensing element, and a signal-blocking element. The shell has an opening. The circuit board is connected to the shell and has a surface facing the opening. The signal-transmitting element is electrically connected to the circuit board and is fixed to the surface. The signal-transmitting element is located in the shell and is adapted to emit a signal to the opening. The signal-sensing element is electrically connected to the circuit board and is fixed to the surface. The signal-sensing element is adapted to receive the signal reflected outside the shell. The signal-blocking element is arranged between the signal-transmitting element and the signal-sensing element.

Abstract: A floating image device includes a collimating optical assembly, a light source assembly, an imaging unit, and a microlens array. The light source assembly is suitable for emitting a beam to the collimating optical assembly, the beam is converted into a collimated beam by the collimating optical assembly, and a spread angle of the collimated beam at a half-intensity position is smaller than +/?15°. The imaging unit is arranged on one side of the collimating optical assembly that is away from the light source assembly, and the collimated beam is suitable for being converted into an image beam by the imaging unit in a collimated manner; and the microlens array is arranged on one side of the imaging unit. The microlens array focuses the image beam and projects a focused image beam into a floating image. The floating image device is capable of making the floating image clear.

Abstract: A light reflective cover includes a concave main reflective surface and a ridge having a connecting surface, a ridge-top reflective surface, a light source end, and a light emitting end. The light source end and the light emitting end are opposite to each other. The connecting surface is opposite to the ridge-top reflective surface and connected to the main reflective surface. The ridge-top reflective surface extends between the light source end and the light emitting end. The ridge-top reflective surface includes a step for dividing the ridge-top reflective surface into a first part near the light source end and a second part near the light emitting end. The second part recesses with respect to the first part toward the connecting surface. The endpoint of the second part at the light emitting end does not protrude beyond an extension line along a first arc formed by the first part.

Abstract: A light reflective cover in the present invention includes a main reflective surface and a ridge. The main reflective surface is a concave surface. The ridge protrudes from the main reflective surface. The ridge has a light source end and a light emitting end that are opposite to each other, and a ridge-top reflective surface extending between the light source end and the light emitting end. The ridge-top reflective surface includes a first part near the light source end and a second part near the light emitting end. The ridge-top reflective surface has a step between the first part and the second part. An illumination apparatus includes the light reflective cover and a light source. The light source is disposed at one side of the light reflective cover having the main reflective surface and the ridge.