Quantum Dot Sheet with Reflective Areas for Display Luminance
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Solution Overview
Problem
Existing display apparatuses face challenges in achieving suitable luminance due to light scattering and loss caused by additional sheets, particularly those using quantum dot materials, which affect color reproducibility and light concentrating power.
Innovation Solution
A display apparatus design featuring a quantum dot sheet with alternately disposed reflective and quantum dot areas, and a refractive sheet with high and low refractive areas, where the low refractive area's bottom edge aligns with the reflective area's edge, enhancing light concentration and color reproduction without the need for additional light concentrating sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a quantum dot sheet is added to improve color reproducibility, then color reproduction is enhanced, but light scattering increases and luminance decreases
Solution Approach 1:
The quantum dot sheet is segmented into alternating reflective areas and quantum dot areas, allowing different regions to perform different functions (light reflection vs. wavelength conversion) to reduce overall light scattering while maintaining color reproduction
Solution Approach 2:
Different areas of the sheet have different optical properties - reflective areas with high reflectivity and quantum dot areas with wavelength conversion capability, optimizing local light interaction to balance color reproduction and luminance
2Illumination intensity
If a light concentrating prism sheet is added to increase luminance, then light concentration is improved, but light is lost due to reflection and refraction at side surfaces
Solution Approach 1:
The light concentrating function is extracted from a separate prism sheet and integrated directly into the quantum dot sheet structure, eliminating the need for additional sheets and reducing light loss at interfaces
Solution Approach 2:
Multiple functions (quantum dot light conversion, light concentration, and reflection) are merged into a single integrated sheet structure, reducing the number of interfaces and associated light losses
3Illumination intensity
If multiple additional sheets are used to achieve suitable luminance, then light concentration is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
Multiple functional sheets (quantum dot sheet and light concentrating sheet) are merged into a single integrated structure, reducing the total number of components and simplifying manufacturing
Solution Approach 2:
The integrated sheet performs multiple functions simultaneously - quantum dot light conversion, light concentration, and reflection - eliminating the need for separate specialized sheets
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 improves color reproducibility and light concentrating power, reducing light loss and enhancing luminance while minimizing manufacturing costs by eliminating the need for additional prism sheets.
Implementation Method 1
a quantum dot area including a quantum dot that scatters the light irradiated from the light source
Implementation Method 2
a reflective area that reflects light irradiated from the light source
Implementation Method 3
a refractive sheet disposed on the quantum dot sheet, and on which a high refractive area and a low refractive area are alternately disposed
Data Source
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AI summary
A display apparatus is provided. The display apparatus includes a light source, a quantum dot sheet on which a reflective area that reflects light irradiated from the light source and a quantum dot area including a quantum dot that scatters the light irradiated from the light source are alternately disposed, and a display panel that displays an image using light provided from the quantum dot sheet.