초록 ▼

The principles of nonimaging optics, rather than imaging optics, are used to provide an asymmetrical flux extraction cup for an LED illumination lamp that has an asymmetrical limited viewing angle or cutoff angle. The cup has a flat section in the bottom normal to the optical axis, for attachment of

The principles of nonimaging optics, rather than imaging optics, are used to provide an asymmetrical flux extraction cup for an LED illumination lamp that has an asymmetrical limited viewing angle or cutoff angle. The cup has a flat section in the bottom normal to the optical axis, for attachment of the LED. In a cross section of one side of the cup, there is a circular section extending from the flat section to a lower point located at an intersection with a line from the opposite cup lip through a nearest edge point of a top surface of an envelope in which the LED is positioned. Next is a lower parabolic section extending from the lower point to an upper point located at an intersection with a projection of the top surface of the positioning envelope. The lower parabolic section has a vertex at the lower point, an axis projecting through the nearest edge point and the lower point, and a focus at the nearest edge point. Then there is an upper parabolic section extending from the upper point to the cup lip. The upper parabolic section has a vertex at the cup lip, an axis extending through the farthest edge point and parallel to the axis of the lower parabolic section, and a focus located at the farthest edge point of the top surface of the positioning envelope.

대표청구항 ▼

A flux extractor cup for extracting light efficiently from an LED positioned on an optical axis within an axially symmetrical virtual positioning envelope and for directing light emitted by the LED within a flux path which is asymmetrical relative to the optical axis, the cup being asymmetrical with

A flux extractor cup for extracting light efficiently from an LED positioned on an optical axis within an axially symmetrical virtual positioning envelope and for directing light emitted by the LED within a flux path which is asymmetrical relative to the optical axis, the cup being asymmetrical with at least one high lip portion and one low lip portion; a flat section located at the bottom of the cup and normal to the optical axis, the flat section having a width equal to a diameter of the positioning envelope; an LED mounted on the bottom of the cup within the positioning envelope; and comprising in at least one side of a first longitudinal cross section: a circular section extending from the flat section to a lower point located at an intersection with a line from the opposite cup lip through a nearest edge point of a top surface of the positioning envelope, the circular section having a constant radius and a center at the nearest edge point; a lower parabolic section extending from the lower point to an upper point located at an intersection of the cup surface with a projection of the top surface of the positioning envelope, the lower parabolic section having a vertex at the lower point, an axis projecting through the nearest edge point and the lower point, and a focus at the nearest edge point; and an upper parabolic section extending from the upper point to the nearer cup lip, the upper parabolic section having a vertex at the nearer cup lip, an axis extending through the farthest edge point and parallel to the axis of the lower parabolic section, and a focus located at the farthest edge point of the top surface of the positioning envelope; and comprising in at least one side of a second longitudinal cross section different from the first longitudinal cross section: a circular section extending from the flat section to a lower point located at an intersection with a line from the opposite cup lip through a nearest edge point of a top surface of the positioning envelope, the circular section having a constant radius and a center at the nearest edge point; a lower parabolic section extending from the lower point to an upper point located at an intersection of the cup surface with a projection of the top surface of the positioning envelope, the lower parabolic section having a vertex at the lower point, an axis projecting through the nearest edge point and the lower point, and a focus at the nearest edge point; and an upper parabolic section extending from the upper point to the nearer cup lip, the upper parabolic section having a vertex at the nearer cup lip, an axis extending through the farthest edge point and parallel to the axis of the lower parabolic section, and a focus located at the farthest edge point of the top surface of the positioning envelope.