Lighting device for creating linear lighting

DE102024208944A1Pending Publication Date: 2026-03-19ISRA VISION GMBH
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-09-18
Publication Date
2026-03-19

AI Technical Summary

Technical Problem

Existing lighting devices for generating linear illumination are inefficient and costly, particularly when using LEDs with wide beam angles, and cylindrical lenses struggle with deformation and material usage during long-length production.

Method used

A lighting device utilizing a lens element with a transparent body that employs total internal reflection (TIR) and a constant cross-sectional profile, incorporating reflective and output coupling surfaces to enhance luminous efficacy and reduce material usage, featuring steps and inclined surfaces to maintain dimensional stability and reduce Fresnel losses.

Benefits of technology

The TIR lens design achieves up to 220% improved luminous efficacy, reduces material usage by 70%, and allows for longer profile production while maintaining optical imaging quality, with reduced manufacturing costs.

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Abstract

The invention relates to a lighting device (10) for generating linear illumination along a longitudinal direction, comprising a lens element (12) which defines an optical center plane (16) along the longitudinal direction and has a constant cross-sectional profile on at least one section, with one or more light sources (14, 14') arranged along the longitudinal direction on one side of the lens element, wherein the lens element is a transparent lens body with one or more coupling surfaces (60, 61, 62) facing the light source(s) through which the light emitted by the light source(s) enters the lens body, with one or more reflection surfaces (68, 69) at which at least a portion of the coupled light is totally reflected within the lens body, and with one or more output coupling surfaces (70, 71, 72) through which the coupled light exits the lens body.having and wherein the lens element and the light source or light sources are arranged such that the light exiting the lens body through the coupling surfaces converges.
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Citation Information

Patent Citations

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