Panel Light LED Arrangement Reduces Lamp Shadow
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Solution Overview
Problem
Conventional panel light devices suffer from a significant 'firefly phenomenon' due to large intervals between LED beads of the same color temperature, resulting in visible lamp shadows, which detract from the appearance and comfort of lighting.
Innovation Solution
A panel light device design featuring a face frame with a rim section and frame body where LED beads of two color temperatures are alternately arranged at equal intervals, with a specific ratio of A/P ≥ 1.2, and a wider rim section to reduce lamp shadow visibility, while maintaining a consistent light emitting area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LED beads are arranged with large intervals to reduce complexity, then device complexity is reduced, but lamp shadow phenomenon becomes more serious
Solution Approach 1:
The patent divides the LED bead arrangement into two distinct color temperature groups (first and second color temperatures) that are alternately positioned. This segmentation allows each color temperature group to have sufficient spacing while maintaining overall uniform illumination, thereby reducing lamp shadow effects without requiring excessive reduction in device complexity.
Solution Approach 2:
The patent applies local quality by positioning LED beads of different color temperatures at different locations within the light source assembly. Specifically, LED beads of the first color temperature and LED beads of the second color temperature are arranged alternately, creating local variations in color temperature distribution that compensate for the large intervals between individual LEDs and reduce visible lamp shadows.
2Stability of the object's composition
If LED beads are arranged alternately with two color temperatures to reduce lamp shadow, then illumination uniformity is improved, but device complexity increases
Solution Approach 1:
The patent segments the LED bead population into two color temperature groups arranged in an alternating pattern. This segmentation achieves illumination uniformity by ensuring that no single color temperature dominates any particular region, while the regular alternating pattern keeps the arrangement systematic rather than chaotic, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent merges two different color temperature LED bead types into a single integrated light source assembly. By combining LED beads of the first color temperature and LED beads of the second color temperature in an alternating arrangement within the same support structure, the patent achieves uniform illumination while consolidating the system into a single device unit, thus limiting the practical increase in device complexity.
3Stability of the object's composition
If rim section width is increased to reduce lamp shadow visibility, then illumination uniformity is improved, but frame body width must be reduced
Solution Approach 1:
The patent applies local quality by giving the rim section a different width characteristic compared to the frame body. The rim section, which directly affects light emission and uniformity, is designed with a greater width (12-18mm) than the frame body (5-9mm). This local differentiation allows the rim section to provide sufficient light mixing distance for uniform illumination while keeping the overall device footprint controlled by the narrower frame body.
Solution Approach 2:
The patent resolves the width conflict by introducing a dimensional hierarchy: the rim section width (12-18mm) is optimized for light mixing in the horizontal dimension, while the frame body width (5-9mm) controls the overall device footprint. The rim section extends beyond the frame body in some dimensions, creating a layered structure where the light-emitting portion has different dimensional characteristics than the structural support portion, thus satisfying both illumination uniformity and compact size requirements.
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 effectively minimizes the lamp shadow phenomenon by ensuring sufficient mixing of light and maintaining a uniform illumination area, enhancing the aesthetic and comfort aspects of panel light devices.
Implementation Method 1
a plurality of LED beads are provided on the light source plate in a lateral way, two color temperatures are provided by the plurality of LED beads, and the LED beads with the two color temperatures are alternately arranged at equal intervals
Implementation Method 2
the lights emitted by the LED beads have a distance large enough for sufficiently mixing light to make the lights at the edge of the rim section uniform
Data Source
Figure 1~2
Figure 3
AI summary
A panel light device includes a back plate (1), a light emitting assembly (2) and a face frame (3) provided with a light emitting opening, which are sequentially disposed from top to bottom; the face frame (3) includes a frame body (4) and a rim section (5) disposed at an inner side of the frame body (4), one end of the rim section (5) is connected with the frame body (4), and the other end is a free end; the light emitting assembly (2) abuts against the rim section (5), and the light emitting assembly (2) includes a light source plate (21) disposed at the inner side of the frame body (4) with a plurality of LED beads (22) being disposed on the light source plate (21) in a lateral way; at least two color temperatures are provided by the plurality of LED beads (22), and the LED beads (22) of a same color temperature being arranged at intervals, where a distance from the LED beads (22) to the free end of the rim section (5) is A, and a distance between the centers of two adjacent LED beads (22) of the same color temperature is P, then a ratio of A/P≧1.2. In the present application, when the width of the face frame (3) is constant or slightly changed, through reducing the width of the frame body (4) and relatively extending the width of the rim section (5), the light emitting area can remain unchanged or not significantly reduced, when the lamp shadow phenomenon of the panel light device is weaken.