Variable Shaped Lamp Shade for Uniform LED Illumination
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Solution Overview
Problem
Conventional LED lamp shades provide inadequate light distribution, leading to non-uniform illumination and increased power consumption when used with LED light sources, as they are designed primarily for protection and decoration rather than functional light distribution.
Innovation Solution
A variable shaped lamp shade with a special optical structural design using translucent materials and optical refraction units with curved surfaces and reflective surfaces to control and diffuse light uniformly within specific angles, reducing the need for additional LEDs and enhancing illumination uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional lamp shades with simple curved surfaces (spherical or cylindrical) are used, then the lamp shade structure is simple and easy to manufacture, but the light distribution is poor resulting in non-uniform illumination and too-bright middle phenomenon
Solution Approach 1:
The lamp shade is divided into multiple light distribution units, each corresponding to one or more LED light sources. Each unit has independently designed curved surfaces that can be optimized for specific light distribution patterns, allowing uniform illumination across different regions while maintaining manufacturing simplicity through modular construction
Solution Approach 2:
Different regions of the lamp shade have different curved surface designs tailored to local light distribution needs. The first curved surface and second curved surface in each light distribution unit are designed with specific curvature radii to control light propagation in different directions, achieving uniform illumination by addressing local lighting requirements rather than using a uniform design throughout
2Illumination intensity
If more LED light sources are installed to improve illumination uniformity, then the light distribution becomes more uniform, but the power consumption increases and cost-effectiveness decreases
Solution Approach 1:
The patent introduces optical elements (curved surfaces with specific curvature radii) as intermediaries between the LED light sources and the illuminated space. These optical elements redirect and distribute light more uniformly without requiring additional LEDs, thereby maintaining illumination uniformity while avoiding increased power consumption
Solution Approach 2:
The patent optimizes the curvature radii of the first and second curved surfaces in each light distribution unit to control light propagation characteristics. By adjusting these geometric parameters, the system achieves uniform light distribution from a fixed number of LED sources, eliminating the need to increase LED quantity and associated power consumption
3Adaptability or versatility
If conventional lamp shades designed for traditional light sources are applied to LED lamps, then the lamp shade structure can be reused, but the LED light source is further narrowed proportionally resulting in too-bright middle phenomenon
Solution Approach 1:
The lamp shade design achieves universality by creating a modular structure with multiple light distribution units that can accommodate different LED light source configurations. Each unit is designed to work optimally with LED characteristics (point light source with greatest brightness at middle), transforming what would be a mismatch into a optimized configuration that works specifically for LED lamps while maintaining structural reusability
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 improved light intensity and uniformity while reducing power consumption by controlling light distribution within a specific range of angles, making it suitable for LED lamps and addressing the limitations of traditional lamp shades.
Implementation Method 1
at least one strip-shaped optical refraction unit, having an external refractive surface, an internal refractive surface corresponding to the external refractive surface
Implementation Method 2
diffuse the light uniformly within a specific range of angles
Implementation Method 3
optical refraction units with curved surfaces and reflective surfaces to control and diffuse light uniformly within specific angles
Data Source
AI summary
In a variable shaped lamp shade of an LED lamp, the lamp shade is made of a translucent material matched with an LED lamp strip and a lamp holder and includes at least one strip-shaped optical refraction unit having an external refractive surface, an internal refractive surface corresponding to the external refractive surface, and an assembling structure for matching the lamp holder. The external refractive surface or internal refractive surface is a curved surface without an inflection point and the curved surface has a constant or gradually changing curvature; and a non-curved surface is formed on the other side. The variable shaped lamp overcomes the problems of conventional LED lamp strips having a low illumination and a non-uniform illumination caused by a direct projection or an installation of a conventional lamp shade, and a low light utility caused by a too-large illumination range.