LED Lighting Device Height Control via Integrated Power Source
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Solution Overview
Problem
Existing LED illumination devices face issues with height control, light output efficiency, cost, and glare control due to the placement of power sources and optical components, leading to uneven light distribution and increased costs.
Innovation Solution
An LED illumination device design featuring a light source carrier with a base that includes a power source within its accommodating space, an optical member with a first and second light distribution unit, and a power source configuration that minimizes additional height and optimizes light output uniformity, reducing light loss and enhancing structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the power source is disposed at the back surface of the bottom frame, then the power source can be installed, but the additional height space increases and height control becomes difficult
Solution Approach 1:
The patent integrates the power source into the accommodating space formed by the base and side walls, merging the power source installation with the overall housing structure. This eliminates the need for separate back surface mounting and avoids additional height space.
Solution Approach 2:
The power source is nested within the accommodating space defined by the base and side walls of the housing. This nesting approach allows the power source to be contained within the existing structural boundaries without increasing overall device height.
2Illumination intensity
If light emitted by the light bar passes through the light guide plate and diffusion plate, then light distribution is achieved, but light loss increases and light output efficiency decreases
Solution Approach 1:
The patent removes the light guide plate from the optical path, extracting this component that caused significant light loss. The design achieves light distribution through alternative means (direct LED arrangement and housing structure) without requiring the light guide plate.
Solution Approach 2:
The patent segments the lighting function across multiple LED light sources arranged in arrays, with each LED contributing to overall light distribution. This segmentation eliminates the need for a single light bar requiring a light guide plate, thereby reducing light loss.
3Loss of energy
If the diffusion plate is removed to reduce light loss, then light output efficiency improves, but uneven light output occurs
Solution Approach 1:
The patent applies local quality by arranging multiple LED light sources at different positions and orientations within the housing. Each LED provides localized illumination, and their combined effect creates uniform overall light distribution, eliminating the need for a diffusion plate.
Solution Approach 2:
The patent transitions from a single light bar source to a three-dimensional array of multiple LEDs positioned at various heights and locations. This dimensional change enables uniform light distribution through spatial arrangement rather than relying on a diffusion plate.
4Illumination intensity
If the light guide plate is used for light distribution, then light can be guided, but the cost increases and glare control is unsatisfactory
Solution Approach 1:
The patent extracts and removes the expensive light guide plate from the design. Light guidance functions are replaced by direct LED placement and housing structure design, significantly reducing material costs while improving glare control.
Solution Approach 2:
The patent replaces the expensive light guide plate with simple, low-cost LED components and housing structures. The design uses economical LED bulbs and basic housing elements to achieve the same or better optical performance at lower cost.
5Reliability
If grilles are disposed at the light output side for protection, then the light source is protected, but height control becomes difficult and packaging cost increases
Solution Approach 1:
The patent merges the protective function with the existing housing structure. The housing itself provides protection for the LED light sources, eliminating the need for separate grille components and maintaining compact height dimensions.
Solution Approach 2:
The housing structure serves multiple functions simultaneously: it provides mechanical support, contains the LED components, and offers protection. This multi-functionality replaces the need for dedicated protective grilles, maintaining height control.
Data Source
AI summary
The present invention provides an LED illumination device, including: a light source carrier including a base, an accommodating space formed on the base; a light emitting unit including a light emitter and a lamp board fixed to the light source carrier; and an optical member covering or at least partially covering the light emitting unit. The light emitting unit and the optical member are both disposed in the accommodating space. The optical member includes a first light distribution unit and a second light distribution unit. At least 70% of a luminous flux generated by the light emitter in operation is directly emitted from the LED illumination device through the second light distribution unit.