Dual Light Guide Plate Lighting Module for Hot Spot Elimination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional lighting solutions, such as electric bulbs and fluorescent lamps, have short lifespans and degrade over time, leading to reduced illuminance, and lack control over light direction and hot spot removal.
Innovation Solution
A lighting module comprising a first and second light guide plate, a reflector, and light emitting devices on substrates, with optical plates and cases that allow for adjustable light emission direction, control of light intensity, and hot spot removal through prism sheets and patterned surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional electric bulbs or fluorescent lamps are used, then they provide basic illumination, but they have short lifespan and degraded illuminance over time
Solution Approach 1:
The patent changes the light source from conventional bulbs or fluorescent lamps to LEDs, which fundamentally alters the operational parameters including lifespan, energy consumption, and illuminance stability. LEDs provide long-lasting illumination without the degradation issues of conventional lighting.
Solution Approach 2:
The patent replaces the mechanical/electrical systems of conventional bulbs and fluorescent lamps with LED technology, which uses electroluminescence to produce light. This substitution eliminates the filament burning out in bulbs and the phosphor degradation in fluorescent lamps, resolving the lifespan and illuminance degradation problems.
2Adaptability or versatility
If single-direction light emission is used, then the structure is simple, but it cannot provide both upward and downward illumination simultaneously
Solution Approach 1:
The patent divides the lighting system into two separate light guide plates (first and second light guide plates) with distinct light-emitting surfaces facing opposite directions. This segmentation allows independent control of upward and downward light emission while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent transitions from single-direction to multi-directional light emission by adding vertical dimensionality with two light guide plates oriented in opposite directions. This enables the system to illuminate both upward and downward simultaneously without significantly complicating the horizontal layout.
3Illumination intensity
If light emitting devices are densely arranged, then high luminance is achieved, but hot spots are generated
Solution Approach 1:
The patent introduces light guide plates as intermediary components between the LED light emitting devices and the final illumination output. The light guide plates distribute the light from densely arranged LEDs across a larger area, maintaining high luminance while preventing hot spots through optical diffusion and redirection.
Solution Approach 2:
The patent applies different surface characteristics to different regions of the light guide plates, with light-emitting surfaces optimized for illumination and other surfaces designed for light guidance. This local differentiation allows dense LED arrangement for high luminance while managing heat distribution to prevent hot spots.
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
Enables simultaneous upward and downward light emission, adjustable light distribution, and elimination of hot spots, extending the lifespan of the lighting module while improving illuminance and reducing power consumption.
Implementation Method 1
a first light guide plate which includes a top surface and a bottom surface, each of which emits light, and a light incident side
Implementation Method 2
a reflector which is disposed between the first light guide plate and the second light guide plate
Implementation Method 3
an optical plate which is disposed between the side of the first light guide plate and the first light emitting devices and includes a fluorescent substance
Data Source
Figure 1~2
Figure 3~6
AI summary
A lighting module may be provided that includes: a first light guide plate which includes a top surface and a bottom surface, each of which emits light, and a light incident side; a second light guide plate which is disposed below the first light guide plate and includes a top surface and a bottom surface, each of which emits light, and a light incident side; a reflector which is disposed between the first light guide plate and the second light guide plate; and a light source which includes first light emitting devices disposed on a side of the first light guide plate, and second light emitting devices disposed on a side of the second light guide plate.