Flat Light Guide with Segmented Direct Indirect Emission
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Solution Overview
Problem
Existing surface lights using plate-shaped light-guiding elements lack flexibility in designing direct and indirect light output, requiring separate lamp arrangements for homogeneous emission and limiting design options.
Innovation Solution
A lamp design featuring a plate-shaped light-guiding element with two distinct lighting groups, where the first group's light is coupled into the element for direct emission and the second group's light is deflected for indirect emission using optical elements, with lens-like projections and reflectors for optimized light distribution, allowing separate control of both components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If light sources are arranged along the light coupling side of the light guide element, then the installation height can be reduced, but the flexibility in designing direct and indirect light output is limited
Solution Approach 1:
The light sources are divided into two distinct groups: a first group arranged along the light coupling side for direct light emission through the light guide element, and a second group arranged on the rear side for indirect light emission through the reflector. This segmentation allows each group to serve a specific lighting function while maintaining a compact overall structure with low installation height.
Solution Approach 2:
Different regions of the luminaire are assigned different light emission characteristics: the front region with the first light source group provides direct illumination through the light guide element, while the rear region with the second light source group provides indirect illumination through the reflector. This local differentiation enables flexible design of direct and indirect light output ratios.
2Stability of the object's composition
If separate lamp arrangements are used for homogeneous emission, then light distribution can be optimized, but the device complexity increases
Solution Approach 1:
The luminaire combines two separate lighting functions (direct and indirect emission) into a single integrated device. The first light source group couples light into the light guide element for homogeneous direct emission, while the second light source group uses the reflector for indirect emission. Both functions are merged into one luminaire structure, reducing the need for separate lamp arrangements while maintaining homogeneous light distribution.
Solution Approach 2:
The light guide element serves multiple functions: it guides light from the first light source group for direct emission, provides structural support, and works in conjunction with the reflector to achieve both direct and indirect lighting from a single device. This multi-functionality reduces overall device complexity by eliminating the need for separate homogeneous emission arrangements.
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 flexible control of direct and indirect light emissions, achieving homogeneous light distribution over a large area with a compact, low-height design, and allows for individual adjustment of color and color temperature.
Implementation Method 1
a plate-shaped light-guiding element into which light is coupled laterally. The light-guiding element serves to distribute the laterally coupled light uniformly and to emit it via a flat surface
Implementation Method 2
light is coupled laterally into the flat light guide
Implementation Method 3
The light guide element has light coupling structures on its light coupling side, each associated with a specific group of light sources. These light coupling structures are formed by laterally projecting, lens-like projections.
Implementation Method 4
The light from the second group of light sources, on the other hand, is deflected and emitted by means of optical elements in a direction opposite to the direction of light emission from the luminaire.
Data Source
Figure 1
Figure 2a~2b
Figure 3~4
AI summary
A luminaire (100) has a plate-shaped light guide element (10) configured to emit light coupled into it via one side of the light guide element (10) through a flat surface (11) oriented substantially perpendicular to the light coupling side (12) in a light emission direction of the luminaire (100). Furthermore, light sources are provided which are arranged along and directed towards the light coupling side (12) of the light guide element (10), wherein the light sources comprise a first and a second light source group (31a, 31b), the light from the first light source group (31a) being coupled into the light guide element (10) and emitted through it in the light emission direction, and the light from the second light source group (31b) being deflected and emitted by means of optical elements in a direction opposite to the light emission direction of the luminaire (100).