Lens for LED light sources

A lens for LED (light emitting diode) light sources, comprising:

• a lower lens unit having a bottom surface coupled to an LED light source;
• and
• an upper lens unit coupled to the lower lens unit, comprising an upper reflective surface symmetrical about a center axis of the lens and angled with respect to the center axis,
• wherein the upper lens unit and the lower lens unit are coupled to define between them an inner space symmetrical about the center axis of the lens, and at least a portion of an upper surface of the lower lens unit in contact with the inner space, forms an inner reflective surface symmetrical about the center axis of the lens and inclined at a predetermined angle, so that light entering the lens from the LED light source through the bottom surface is reflected by the upper reflective surface and exits the lens through the upper lens unit in a direction substantially perpendicular to the center axis of the lens, and light entering the lens from the LED light source through the bottom surface is reflected by the inner reflective surface and exits the lens through the lower lens unit in a direction substantially perpendicular to the center axis of the lens.

A lens for LED (light emitting diode) light sources, comprising:

• a lower lens unit having a bottom surface coupled to an LED light source;
• an upper lens unit coupled to the lower lens unit, comprising an upper reflective surface symmetrical about a center axis of the lens and angled with respect to the center axis, wherein the upper lens unit and the lower lens unit are coupled to define between them an inner space having a ring shape;
• and
• an inside reflective surface provided on an inside boundary surface of the inner space, so that part of light entering the lens from the LED light source through the bottom surface is reflected by the inside reflective surface and exits the lens in a direction substantially perpendicular to the center axis of the lens.