Semiconductor Device Quantum Structure Phosphor Color Gamut
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Solution Overview
Problem
Existing semiconductor components for generating electromagnetic radiation struggle to achieve high efficiency and large color gamut simultaneously, particularly in display devices like LCDs, as they require complex electronic control systems and compromise on efficiency when trying to cover a wide range of colors.
Innovation Solution
A semiconductor component comprising one or more semiconductor chips generating primary radiation, a first conversion element with a quantum structure that shifts the radiation into secondary radiation, and a second conversion element with a phosphor that generates tertiary radiation, allowing for efficient color generation and a large color space with a simpler design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If three different light-emitting diodes are used to generate radiation in the red, green and blue spectral range, then a high color gamut is achieved, but a complex electronic control system is required
Solution Approach 1:
The invention segments the color generation function into two independent parts: (1) a single blue LED generates primary radiation, and (2) two separate conversion elements (quantum structure for green, phosphor for red) convert this radiation to different spectral ranges. This segmentation eliminates the need for complex electronic control of multiple LEDs while achieving high color gamut through spectral conversion.
Solution Approach 2:
The invention introduces conversion elements as intermediaries between the blue LED and the final output colors. The quantum structure and phosphor act as mediators that transform the blue light into green and red radiation respectively, enabling color generation without directly controlling multiple LED sources.
2Adaptability or versatility
If phosphors are added to improve color gamut, then the available colors increase, but the efficiency decreases
Solution Approach 1:
The invention uses a composite conversion system combining two different materials with complementary properties: a quantum structure for high-efficiency green conversion with narrow emission bandwidth, and a phosphor for red conversion. This composite approach optimizes both efficiency and color gamut by selecting materials whose emission characteristics do not overlap significantly, minimizing energy loss.
Solution Approach 2:
The invention applies different conversion mechanisms to different spectral regions: quantum structures for the green region where narrow-band emission is critical for efficiency, and phosphors for the red region. Each conversion element is optimized for its specific spectral range, achieving high overall efficiency while expanding color gamut.
3Adaptability or versatility
If conversion elements with phosphors are used, then color generation is achieved, but the emission bandwidth is broad (FWHM 50-100 nm) reducing color purity
Solution Approach 1:
The invention changes the emission bandwidth parameter by using quantum structures instead of conventional phosphors for green conversion. The quantum structure's emission FWHM is controlled at 30-50 nm through material composition and layer thickness parameters, achieving narrow-band emission and high color purity while maintaining efficient conversion.
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 achieves high efficiency and a large color gamut with greater color purity and reduced complexity, using quantum structures for spectrally narrow-band emission and phosphors to generate desired tertiary radiation, improving the available color space effectively.
Implementation Method 1
at least one first conversion element with a quantum structure is provided, with the quantum structure being designed to at least partially shift the primary radiation into a secondary radiation with a second peak wavelength
Implementation Method 2
at least one second conversion element is provided, which has a phosphor, the phosphor being designed to shift electromagnetic radiation to tertiary radiation with a dominant wavelength
Data Source
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AI summary
The invention relates to a semiconductor component having a semiconductor chip for producing an electromagnetic primary radiation having a first peak wavelength, having a first conversion element, which has a quantum structure, wherein the quantum structure is designed to shift the primary radiation at least partially into a secondary radiation having a second peak wavelength, wherein a second conversion element is provided, which has a luminescent substance, wherein the luminescent substance is designed to shift an electromagnetic radiation into a tertiary radiation having a dominant wavelength, wherein the first conversion element is designed to produce a secondary radiation that has a peak wavelength that is smaller than the dominant wavelength of the tertiary radiation.