Light-guiding cover and illumination device having the same

An illumination device, comprising:

• a light-guiding cover integrally formed in one piece, wherein the light-guiding cover includes a light input surface and a light output surface, the light input surface defines a central axis perpendicular thereto, and each one of the light input surface and the light output surface is symmetrical about the central axis,
• wherein the light-guiding cover has a reflecting portion inwardly formed from the light input surface and substantially symmetrical about the central axis, the reflecting portion surrounding the central axis has a first surface and a corresponding second surface, and wherein the light input surface is defined as an inner region and an outer region by the reflecting portion, the first surface of the reflecting portion facing the light output surface is arranged away from the central axis to act as an outer reflecting surface, the second surface of the reflecting portion facing the central axis is arranged near to the central axis to act as an inner reflecting surface;
• and
• an LED having a light emitting surface arranged in a top surface thereof, wherein the LED is arranged adjacent to the light input surface of the light-guiding cover, and the light emitting surface orientates toward the light input surface;
• wherein the light emitting surface of the LED is sized to be substantially the same as the light input surface of the light-guiding cover;
• wherein the LED is configured to emanate portions of light beams into the light-guiding cover via the inner region of the light input surface and reflected by the inner reflecting surface to exit from an upper light output region of the light output surface, another portions of light beams emanate into the light-guiding cover via the outer region of the light input surface and reflected by the outer reflecting surface to exit from the upper light output region and a lower light output region of the light output surface.