Linear Lighting Device: Preventing Glare and Misassembly
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Summary
Problems
Linear lighting devices using elongated light guides for vehicle interior lighting face issues with glare prevention, misassembly, and non-uniform illumination due to the light guide's thin and long design, which can bend or twist, making it difficult to attach correctly and resulting in undesirable illumination patterns.
Innovation solutions
A linear lighting device design featuring an elongated light guide with grooves and a stepped cutout at one end, a protruding portion on the case, and light shielding and scattering elements to prevent misassembly and improve illumination uniformity, including a light shaping wall for a gradational illumination effect.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the light guide is made thin and long to achieve linear illumination, then the illumination coverage is improved, but the light guide bends or twists causing misassembly and non-uniform illumination
Why choose this principle:
The patent applies preliminary action by pre-forming grooves and a stepped cutout on the light guide surface, and providing a protruding portion on the case before assembly. These features are prepared in advance to guide correct positioning and prevent bending or twisting during installation, thereby maintaining shape stability while achieving linear illumination coverage.
Principle concept:
If the light guide is made thin and long to achieve linear illumination, then the illumination coverage is improved, but the light guide bends or twists causing misassembly and non-uniform illumination
Why choose this principle:
The patent employs asymmetry through the stepped cutout and protruding portion configuration, where the cutout has specific depth variations and the protruding portion is positioned asymmetrically on the case. This asymmetric design creates a unique fitting geometry that prevents misassembly and ensures the light guide maintains its intended shape during installation.
Application Domain
Data Source
AI summary:
A linear lighting device design featuring an elongated light guide with grooves and a stepped cutout at one end, a protruding portion on the case, and light shielding and scattering elements to prevent misassembly and improve illumination uniformity, including a light shaping wall for a gradational illumination effect.
Abstract
The present invention provides a linear lighting device which includes an elongated light guide, a light source disposed at an end in a longitudinal direction of the light guide, and a case accommodating the light guide and the light source. In the linear lighting device, the light guide has a plurality of grooves arranged in the longitudinal direction of the light guide, and has a stepped cutout at the other end on an opposite side from the end, and a protruding portion protruding into the cutout is formed on an inner surface of the case which faces the cutout.