Decorative Bulb Inner Lens for Uniform Light Distribution
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Solution Overview
Problem
Decorative bulbs with a pointed-bulb shape exhibit uneven brightness due to the non-uniform light emission along their outer surface, resulting in a visually unappealing effect with dark areas in the middle when viewed from the outside.
Innovation Solution
A decorative bulb design featuring an inner semi-ellipsoid optical lens with a cone-shaped cavity and a light refraction strengthening part on its outer surface, combined with a conical and cylindrical light bulb covering cavity, and a translucent filling layer, which refracts and scatters light uniformly across the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pointed-bulb-shaped decorative bulb with a luminous plate at the bottom is used, then the bulb structure is simple and easy to manufacture, but the light emission is non-uniform causing dark areas in the middle when viewed from the outside
Solution Approach 1:
An optical lens is introduced as an intermediary component between the luminous plate and the light bulb covering. The lens includes a light refraction strengthening part with annular wave structure that mediates the light transmission process, refracting light to eliminate dark areas and achieve uniform brightness distribution across the bulb surface.
Solution Approach 2:
The optical lens changes the optical parameters of light transmission by incorporating a light refraction strengthening part with specific annular wave structure. The wave structure parameters (crest and trough angles decreasing from bottom to top, wave height increasing then decreasing) are optimized to control light refraction and achieve uniform light emission.
2Illumination intensity
If an optical lens with light refraction strengthening part is added to achieve uniform light emission, then the illumination uniformity is improved, but the device complexity increases
Solution Approach 1:
The optical lens is integrally formed with the mounting base, merging two components into one. The light refraction strengthening part is integrally formed with the lens, further reducing part count. This merging approach achieves uniform light emission while minimizing the increase in device complexity.
Solution Approach 2:
The optical lens serves multiple functions: it focuses light from the luminous plate, refracts light to eliminate dark areas, and distributes light uniformly across the bulb surface. The mounting base with integrated lens also serves as both structural support and optical element, reducing the need for separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves uniform brightness and a better visual effect by refracting and scattering light to eliminate dark areas, providing consistent illumination from all angles.
Implementation Method 1
the lens part is provided with a light refraction strengthening part on an outer surface of the lens part... refracts and scatters light uniformly across the surface
Data Source
AI summary
A decorative bulb with inner lens includes a mounting base; a light bulb covering mounted on the mounting base; an optical lens, comprising a mounting part and a lens part integrally formed with the mounting part, the lens part is a semi-ellipsoid structure, and the lens part is provided with a light refraction strengthening part on an outer surface of the lens part, the light refraction strengthening part extends from a top of the lens part along the outer surface of the lens part to a bottom of the lens part, and a cross section of the light refraction strengthening part is in a shape of annular wave; a light unit mounted in the cone-shaped cavity.