Radiation-emitting Component with Optical Waveguide for High Luminance
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Solution Overview
Problem
Existing radiation-emitting components face challenges in achieving high luminance without the need for high-current operations, which can be undesirable due to design and operational limitations.
Innovation Solution
A radiation-emitting component design that includes a semiconductor layer sequence as a radiation source, an optical waveguide device, and a conversion element, where the emission surface of the radiation source is larger than the input surface of the conversion element, allowing for efficient radiation guidance and conversion, thereby achieving high luminance without high-current conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-current operation is used to achieve high luminance, then radiation emission luminance is improved, but operational reliability and design suitability deteriorate
Solution Approach 1:
The invention segments the radiation emission process into two distinct stages: (1) radiation generation by the semiconductor chip, and (2) radiation concentration and emission by the optical element. This segmentation allows the semiconductor chip to operate at safe current densities while the optical element handles the luminance concentration, thereby resolving the contradiction between high luminance and operational reliability
Solution Approach 2:
The invention transitions from a direct emission approach (single dimension of current density control) to a two-dimensional approach combining (a) extended emission surface area and (b) optical concentration. The optical element concentrates radiation from the extended surface onto a smaller target area, achieving high luminance without requiring high current density operation
2Illumination intensity
If high-current operation is used to achieve high luminance, then radiation emission luminance is improved, but design complexity increases
Solution Approach 1:
By separating the radiation generation function (semiconductor chip) from the luminance concentration function (optical element), the invention avoids the need for complex high-current management circuits and cooling systems that would be required for direct high-current operation. Each component operates within its optimal design parameters
Solution Approach 2:
The optical element acts as an intermediary between the semiconductor chip and the target application. It receives radiation from the chip and concentrates it to achieve high luminance, thereby eliminating the need for complex high-current operation and associated design challenges
3Productivity
If emission surface is made larger than conversion element input surface, then radiation concentration efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates preliminary alignment features directly into the optical element design, such as integrated mounting structures and alignment marks. These features enable precise positioning of the optical element relative to the semiconductor chip during assembly, thereby achieving high radiation concentration efficiency without requiring extremely tight manufacturing tolerances on the emission surfaces themselves
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 design enables high luminance radiation emission by concentrating radiation on the conversion element, allowing for efficient radiation conversion and reemission in all directions, thus overcoming the limitations of high-current requirements.
Implementation Method 1
a radiation source (120, 220) comprising at least one semiconductor layer sequence that generates radiation
Implementation Method 2
an optical waveguide device (130, 230) disposed downstream of the radiation source
Implementation Method 3
a conversion element (140, 240) for radiation conversion disposed downstream of the optical waveguide device
Data Source
AI summary
A radiation-emitting component includes a radiation source including at least one semiconductor layer sequence that generates radiation; an optical waveguide device disposed downstream of the radiation source; and a conversion element for radiation conversion disposed downstream of the optical waveguide device, wherein radiation is emittable from the radiation source via an emission surface and couplable into the optical waveguide device, radiation is couplable from the optical waveguide device into the conversion element via an input surface, and the emission surface of the radiation source is larger than the input surface of the conversion element.