Curved Quantum Dot Accommodator for Display Backlight Uniformity
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Solution Overview
Problem
Current LED backlight units face challenges in reducing optical loss and improving color uniformity for producing white light, which hinders their application in display devices.
Innovation Solution
Incorporating a wavelength converting member with wavelength converting particles, such as quantum dots, housed in an accommodating part with a curved surface, which converts light from the LEDs into white light by refraction, scattering, and reflection, ensuring uniform light distribution across the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a quantum dot structure is used to produce white light, then color reproduction characteristics are improved, but optical loss increases and color uniformity deteriorates
Solution Approach 1:
The patent applies a curved surface structure to the accommodating part containing quantum dots. This curvature design modifies light propagation paths through refraction and reflection, enabling more uniform light distribution across the display panel while reducing optical loss and improving color uniformity compared to flat structures
2Illumination intensity
If a quantum dot structure is used to produce white light, then color reproduction characteristics are improved, but color uniformity across the display panel deteriorates
Solution Approach 1:
The curved surface of the accommodating part acts as an optical element that redistributes light rays. By designing the curvature appropriately, the patent achieves uniform color distribution across the entire display panel, solving the color uniformity problem while maintaining excellent color reproduction characteristics
Solution Approach 2:
The patent positions the quantum dot-containing accommodating part at specific locations within the backlight unit, strategically arranged to ensure uniform light distribution across the display panel. This local optimization approach addresses color uniformity while preserving the superior color reproduction properties of quantum dots
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 enhances brightness uniformity and overall brightness of the display device by uniformly incident light on the display panel, reducing Fresnel loss and improving color uniformity, thus making the display more efficient and durable.
Implementation Method 1
converts light from the LEDs into white light by refraction, scattering, and reflection
Implementation Method 2
converts light from the LEDs into white light by refraction, scattering, and reflection
Implementation Method 3
converts light from the LEDs into white light by refraction, scattering, and reflection
Data Source
AI summary
Provided are an optical member and a display device. The display device includes a light source, a plurality of wavelength converting particles, an approximately, and a display panel. The wavelength converting particles convert a wavelength of light emitted from the light source. The accommodating part accommodates the wavelength converting particles and has a curved surface. The display panel is configured to display images using light changed by the wavelength converting particles.