L-Shaped Cabinet Light With Diffuser and Reflector for Uniform Illumination
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Solution Overview
Problem
Existing cabinet lights have low light conversion efficiency and uneven illumination, failing to adequately illuminate the inner environment of cabinets.
Innovation Solution
A cabinet light with a diffuser and reflector behind an L-shaped lamp shade, featuring a diffusion plate and reflection plate arranged obliquely between the luminous unit and the lamp shade, along with convex prismatic elements on the lamp shade surface, to enhance illumination uniformity and light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If edge type surface illuminating cabinet lights are used, then the cabinet light can be manufactured in a thin shape with generally uniform illuminance, but the light conversion efficiency is low and the illuminance at the edge is relatively higher than the center
Solution Approach 1:
The patent introduces a light guide plate as an intermediary component between the LED light source and the emitting surface. The light guide plate receives light from the LED and guides it to the emitting surface through internal reflection and refraction, achieving thin profile while improving light distribution uniformity and conversion efficiency
Solution Approach 2:
The patent applies different surface treatments to different regions of the light guide plate. The front surface has a diffuse transmitting layer for uniform light output, while the side surface has a reflective layer to redirect edge light toward the center, creating locally optimized light distribution properties
2Shape
If edge type surface illuminating cabinet lights are used, then the cabinet light can be manufactured in a thin shape, but the illuminance at the edge is relatively higher than the center of the emitting surface
Solution Approach 1:
The patent applies different surface treatments to different regions of the light guide plate. The front surface has a diffuse transmitting layer for uniform light output, while the side surface has a reflective layer to redirect edge light toward the center, creating locally optimized light distribution properties
Solution Approach 2:
The patent transitions from edge-only lighting to a three-dimensional light distribution system by adding vertical light extraction surfaces and internal reflective structures, transforming the light path from a two-dimensional edge constraint to a multi-dimensional distribution pattern that achieves uniform illumination
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 design achieves even lighting across the lamp shade surfaces, increases the luminous area, and protects users' eyes from harmful light effects, while optimizing power consumption and providing adjustable lighting options.
Implementation Method 1
A diffusion plate and a reflection plate are arranged between the lamp shade and the luminous unit. The diffusion plate is obliquely arranged on the upper side of the luminous unit
Implementation Method 2
The reflection plate is obliquely arranged on the lower side of the luminous unit. The diffusion plate and the reflection plate enclose to form a light refraction region
Implementation Method 3
the outer surface of the lamp shade has a plurality of convex prismatic elements
Data Source
AI summary
A cabinet light includes a housing, a luminous unit arranged inside the cover, and an L-shaped lamp shade connected to the housing. The lamp shade is configured as an L-shape structure. Light emitting elements of the luminous unit are arranged to project light towards the inner side of the lamp shade. A diffusion plate and a reflection plate are obliquely arranged between the lamp shade and the luminous unit. A pulse width modulation rotary switch and a passive infrared sensor might be used to control the luminous unit.