LED Bar Lighting Uniform Illumination via Bar Lens

The patent introduces a lens as an intermediary component between the LED chip and the illuminated surface. The lens has specific optical surfaces (first optical surface and second optical surface) that refract and redirect light rays to achieve uniform illumination distribution. This intermediary element allows a single LED chip to produce uniform illumination without requiring multiple chips, thereby resolving the contradiction between illumination uniformity and device complexity

The patent changes the optical parameters of the system by designing specific lens surface profiles (convex or concave shapes with defined radii of curvature). By adjusting the lens parameters (surface curvature, thickness, material refractive index), the light distribution pattern is transformed from non-uniform (bright center, dark edges) to uniform across the illuminated area. This parameter change approach enables uniform illumination while maintaining a simple single-chip configuration

The lens acts as an optical intermediary that redistributes light from a single LED chip uniformly across the target area. This eliminates the need to purchase and install multiple LED chips, directly reducing material costs while achieving the desired illumination uniformity

The lens creates multiple virtual light sources through refraction, effectively copying the light output in different directions. This optical copying allows one physical LED chip to illuminate multiple areas uniformly, replacing the need for multiple physical chips and reducing overall system cost