Semiconductor Component Quantum Structure Color Gamut
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Solution Overview
Problem
Current backlighting technologies for display devices, such as LCDs, face challenges in achieving a high color gamut while maintaining efficiency, as they often require complex electronic control and suffer from reduced efficiency when adding multiple phosphors or direct LED radiation.
Innovation Solution
A semiconductor component comprising a semiconductor chip that generates primary radiation in the ultraviolet or blue spectral range, combined with a radiation conversion element using a quantum structure to produce secondary radiation in the green, yellow, or red spectral range, which together emit mixed radiation appearing white to the human eye, enhancing color gamut and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple phosphors are added to improve color gamut, then color gamut is improved, but efficiency decreases
Solution Approach 1:
The patent segments the radiation conversion function into multiple independent quantum structure layers, each layer containing quantum dots with specific size distributions that emit at different wavelengths. This allows precise control over the emission spectrum without requiring multiple phosphor materials, thereby maintaining high conversion efficiency while achieving broad color gamut coverage.
Solution Approach 2:
The patent employs composite quantum structures combining different semiconductor materials (e.g., CdSe, CdTe, ZnSe) with distinct bandgap energies within the same layer sequence. Each material contributes to specific portions of the spectrum, enabling efficient multi-wavelength emission from a single integrated structure rather than mixing multiple phosphor materials.
2Adaptability or versatility
If three different LEDs are used to generate red, green and blue radiation, then color gamut is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple radiation conversion functions into a single integrated semiconductor component. Multiple quantum structure layers with different emission characteristics are stacked within one device, all excited by a single blue or UV LED source. This eliminates the need for three separate LED chips and their associated complex driving electronics, while still achieving full-color emission.
Solution Approach 2:
The patent creates a universal radiation conversion platform where a single LED source can excite multiple quantum structure layers to produce different colors. The quantum structures serve multiple functions simultaneously: absorbing blue/UV light, converting it to different wavelengths, and emitting red, green, and blue radiation, all within one device architecture.
3Adaptability or versatility
If phosphors are used for radiation conversion, then color gamut can be improved, but color purity is reduced
Solution Approach 1:
The patent applies local quality control by precisely engineering the size distribution of quantum dots within each layer to emit at specific wavelengths with narrow full-width-at-half-maximum (FWHM). Each quantum structure layer is optimized to emit in a specific spectral region with high purity, and the combination of these narrow-band emissions achieves broad color gamut while maintaining superior color purity compared to broad-spectrum phosphors.
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 solution achieves a high color gamut with high efficiency by using a quantum structure-based radiation conversion element, offering thermal stability, adaptable emission wavelengths, and reduced heat loss, while simplifying production and achieving higher color purity compared to traditional phosphor-based systems.
Implementation Method 1
a radiation conversion element, which converts the primary radiation at least partly into secondary radiation having a second peak wavelength
Data Source
AI summary
A semiconductor component and an illumination device is disclosed. In an embodiment the semiconductor component includes a semiconductor chip configured to generate a primary radiation having a first peak wavelength and a radiation conversion element arranged on the semiconductor chip. The radiation conversion element includes a quantum structure that converts the primary radiation at least partly into secondary radiation having a second peak wavelength and a substrate that is transmissive to the primary radiation.