Lighting device

Abstract

A lighting device is provided. The lighting device includes: a light source module mounted on a substrate; a lens unit provided on the light source module and including an accommodating groove accommodating the light source module; a housing unit accommodating the lens unit therein to protect the lens unit from an outside; a supporting unit fixed to the substrate and including a coupling hole having the housing unit coupled thereto to thereby support the housing unit; and a height adjustment unit allowing the housing unit to be vertically-movably coupled to the supporting unit and adjusting a height of the lens unit such that the height of the lens unit is varied.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2010-0088407 filed with the Korean Intellectual Property Office on Sep. 9, 2010, the disclosure of which is hereby incorporated by reference. technical field [0002] The invention relates to a lighting device. Background technique [0003] In general, a light emitting device package including a light emitting device that emits light according to an electrical signal applied to the light emitting device has been widely used in various electronic products and mobile communication terminals (eg, personal cell phones, personal digital assistants (PDAs) and the like). [0004] Recently, as the efficiency of light emitting devices increases, the application range of light emitting device packages has expanded, and for various applications of light emitting device packages, a secondary lens is required. [0005] Here, the secondary lens refers to a lens formed such that light emitted from the light emit...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the direct attachment method may be that the function of the direct attachment method to protect the light emitting device package and the secondary lens from the external environment is defective.

[0009] Also, since the secondary lens needs to be attached directly to the substrate, an attachment area wider than the diameter of the secondary lens may be required

[0010] In addition, the column structure attachment method is a method of fixing the secondary lens by using a separate columnar device, and the column structure attachment method may have a disadvantage in that there may be damage to the lens due to deformation of the columnar device (deformation of the columnar shape). The arrangement and optical performance of the

[0011] In addition, similar to the direct attachment method, the post structure attachment method may require an attachment area wider than the diameter of the secondary lens, and in the post structure attachment method, precise placement of the light emitting device package may be hindered due to injection molding of the posts.

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