Lighting Device With Light Adjusting Structure To Block Oblique Emission
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Solution Overview
Problem
Conventional lighting devices suffer from reduced lighting quality due to input light emission to adjacent units, which affects the overall display quality.
Innovation Solution
The proposed lighting device incorporates a plurality of first and second lighting units, each equipped with a light source, a reflective layer, and a light converting structure containing quantum dots. The light converting structures are designed to convert light into specific output spectra, with the first output light having a sub peak between 400 nm and 500 nm and a main peak between 590 nm and 780 nm, and the second output light having a sub peak and main peak in different spectral ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional lighting devices are used, then the lighting units can emit light, but the input light emits to adjacent lighting units causing reduced lighting quality
Solution Approach 1:
A light adjusting structure is introduced as an intermediary component between the light source and the output. This structure includes a light blocking portion that selectively blocks oblique input light while allowing normal light to pass through to the quantum dots, preventing harmful light from reaching adjacent lighting units while maintaining desired light output
2Illumination intensity
If light blocking structures are added to prevent light emission to adjacent units, then lighting quality improves, but device complexity increases
Solution Approach 1:
The light adjusting structure serves multiple functions simultaneously: it blocks oblique light from reaching adjacent units, allows normal light to pass through to the quantum dots for conversion, and maintains the overall lighting function. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in device complexity
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
This configuration enhances lighting quality by minimizing light emission to adjacent units, resulting in improved display quality and increased collimation of light, which is approximately parallel to the normal direction after passing through the light adjusting structures.
Implementation Method 1
a first light converting structure configured to convert the first light into the first output light, wherein the first light converting structure is disposed on the first light source, and the first light converting structure includes a plurality of first quantum dots
Implementation Method 2
a first reflective layer configured to reflect the first light, wherein the first reflective layer is disposed on one side of the first light source
Data Source
AI summary
A lighting device includes a plurality of first lighting units and a plurality of second lighting units. The first lighting unit includes a first light source, a first reflective layer, and a first light converting structure and emits a first output light. The second lighting unit includes a second light source, a second reflective layer, and a second light converting structure and emits a second output light. A normal intensity of a first sub peak of the first output light is less than a normal intensity of a second sub peak of the second output light, and the normal intensity of the first sub peak is in a range from 0.1% to 10% based on 100% of a normalized intensity of a normal intensity of the first main peak of the first output light.