Backlighting Module With Embedded Emission Sources
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Solution Overview
Problem
Conventional backlight modules are expensive to manufacture and consume high energy, particularly when used for large objects, as the power of the emission source increases with the size of the object, making them inefficient and costly for applications like large advertising posters or road signs.
Innovation Solution
A lighting module with multiple low-power Electro Luminescent Diodes (ELDs) placed inside a light guide made of a liquid or pasty material that solidifies after insertion, emitting light parallel to the guide's faces, allowing for efficient light distribution and reducing manufacturing and energy costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the power of the emission source is increased to illuminate larger objects, then the illumination area is improved, but the energy consumption and manufacturing cost increase
Solution Approach 1:
The light guide is divided into multiple segments, each containing a separate emission source. This allows the system to illuminate large areas by distributing multiple low-power sources rather than using a single high-power source, thereby reducing overall energy consumption while maintaining large area coverage
Solution Approach 2:
The emission sources are positioned inside the light guide volume rather than on the surface, and light is emitted in directions parallel to the guide faces. This three-dimensional arrangement allows more efficient light distribution across large areas without proportionally increasing energy consumption
2Area of stationary object
If the power of the emission source is increased to illuminate larger objects, then the illumination area is improved, but the manufacturing cost increases
Solution Approach 1:
The system uses multiple independent emission sources instead of a single high-power source. Each source can be manufactured and tested separately, allowing for more economical production and easier replacement, thereby reducing manufacturing costs for large area illumination applications
Solution Approach 2:
The invention employs multiple low-cost emission sources that can be easily manufactured and replaced if needed. This approach is more economical than using expensive high-power sources, especially for large area applications where multiple units are required
3Illumination intensity
If emission sources are placed inside the light guide, then light distribution is improved, but the device complexity increases
Solution Approach 1:
The emission sources are integrated directly into the light guide structure, with the guide material itself serving as the encapsulating medium. This merging of components simplifies the overall device architecture while achieving improved light distribution uniformity through the internal positioning of sources
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 enables the creation of large, cost-effective, and energy-efficient lighting modules that can adapt to various sizes, providing uniform illumination without the need for intermediate spaces, thus reducing energy losses and manufacturing expenses.
Implementation Method 1
a light guide comprising a transmission face arranged to transmit light emitted by the emission sources to an object to be illuminated
Implementation Method 2
means for returning towards the interior of the guide the light emitted by the emission sources and received by the return face
Implementation Method 3
the guide is preferably made of a material that is initially liquid or pasty during the manufacture of the module, said material being solidified (by cooling, by thermofusion, by polymerization, by cross-linking or other) after insertion of the emission sources in the guide
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a lighting module (1) comprising: a plurality of light emission sources (2); a lightguide plate (3) having a transmission face (4), designed to transmit light emitted by the emission sources (2) from the lightguide to an object to be lit, and a reflection face (5), facing the transmission face (4); and means (12, 13) for sending the light emitted by the emission sources (2) and received by the reflection face (5) back into the lightguide (3). According to the invention, the emission sources (2) are located within the lightguide (3) between the transmission face (4) and the reflection face (5), each of the emission sources (2) being designed to emit light in an emission direction (9, 29) approximately parallel to the reflection face (5).