Table Lamp Asymmetric LED Arrangement Glare Control
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Solution Overview
Problem
Current table lamps struggle to meet requirements for low glare hazard, even light distribution, and low blue light hazard simultaneously, often resulting in thick designs that are not interchangeable between left-handed and right-handed modes and are costly, with many designs failing to meet blue light hazard standards due to small numbers of high power LEDs.
Innovation Solution
A compact table lamp design featuring two elongate LED arrangements, each providing asymmetric light output, with a shared beam-shaping lens structure and independent control, allowing for left-handed and right-handed operation without reconfiguration, utilizing a large number of low power LEDs to manage blue light hazard and achieve desired light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a small number of high power LEDs are used, then the device complexity is reduced, but the blue light hazard requirement cannot be met
Solution Approach 1:
The patent divides the lighting system into multiple individual LED sources (typically 3-5 LEDs) instead of using a single high power LED. Each LED is equipped with its own optical element, creating a segmented approach to light generation that reduces blue light hazard while maintaining sufficient illumination.
Solution Approach 2:
Optical elements (lenses or reflectors) are introduced as intermediary components between each LED and the work surface. These optical elements shape and distribute the light from multiple low-power LEDs to achieve uniform illumination while controlling blue light exposure.
2Illumination intensity
If an asymmetric light output is provided, then the light distribution requirement is met, but the lamp becomes suitable for mounting with only one orientation
Solution Approach 1:
The patent employs asymmetric optical elements (lenses or reflectors) for each LED that are specifically shaped to direct light toward the work surface and control the light distribution pattern. This asymmetric design achieves uniform illumination across the workspace while the overall symmetric arrangement of multiple LEDs maintains mounting flexibility.
3Object-affected harmful factors
If the light source is recessed out of view, then the glare hazard is reduced, but the lamp head becomes thick
Solution Approach 1:
The patent positions multiple LED sources along the longitudinal axis of the lamp head rather than recessing them deeply in the transverse dimension. This dimensional reorganization allows the light sources to remain visible yet control glare through their linear arrangement and the use of optical elements that direct light away from the user's eyes.
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 effective glare control, uniform light distribution, and compliance with blue light hazard standards while being compact, cost-effective, and aesthetically pleasing, with a thin profile and adjustable orientation to suit various user needs.
Implementation Method 1
beam-shaping lens structure associated with the two LED arrangements
Implementation Method 2
The lens structure may form a top surface of the light guiding body for reflecting light towards a bottom light exit surface of the light guiding body
Implementation Method 3
The ridges may comprise total internal reflection facets for reflecting light towards the bottom light exit surface
Implementation Method 4
two elongate LED arrangements each extending along the length direction of the elongate head, each LED arrangement providing a light output pattern
Data Source
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AI summary
A table lamp comprises a base and an elongate head. The head has two elongate LED arrangements each extending along the length direction of the elongate head, each LED arrangement providing a light output pattern which is asymmetric and is generally directed to a respective lateral side of the elongate head. A beam-shaping lens structure is associated with the two LED arrangements. Each LED arrangement is independently controlled. Thus, separate LED arrangements are provided, one for left-handed use and one for right-handed use. This avoids the need for reconfiguration between left-handed and right-handed operation, and the lamp design is able to meet requirements of glare control, light uniformity, and blue light hazard control.