Patent ID: 8558266
Filing Date: 2013-10-15
Classification: G02B

Abstract:
1. An LED lighting device comprising: an LED module for fixing an LED element; and a light guide body placed in parallel with the LED module, facing an LED element side of the LED module, having a reflecting surface, wherein the LED lighting device irradiates light emitted from the LED element of the LED module and propagated through the inside of the light guide body by reflecting the light on the reflecting surface of the light guide body in a direction of an irradiation axis, and wherein the reflecting surface is formed of division lines and a connection line connecting between the division lines, each division line dividing a cross section line of a virtual reflecting surface crossing projection lines, each projection line drawn radially at a selected angle from a selected point of a given distance away from a center point of the LED element toward the cross section line of the virtual reflecting surface of the light guide body, and each division line being adjusted by similar amplification or similar contraction so as to be contained within a thickness line whose distance is large enough to receive all incoming light.